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source: trunk/gui/scripts/vtkvolumeviewer.tcl @ 4183

Last change on this file since 4183 was 4183, checked in by ldelgass, 11 years ago
Fix for vtkvolume tester: prevent infinite loop
File size: 103.1 KB

Line
1	# -- mode: tcl; indent-tabs-mode: nil --
2
3	# ----------------------------------------------------------------------
4	# COMPONENT: VtkVolumeViewer - Vtk volume viewer
5	#
6	# It connects to the Vtk server running on a rendering farm,
7	# transmits data, and displays the results.
8	# ======================================================================
9	# AUTHOR: Michael McLennan, Purdue University
10	# Copyright (c) 2004-2012 HUBzero Foundation, LLC
11	#
12	# See the file "license.terms" for information on usage and
13	# redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES.
14	# ======================================================================
15	package require Itk
16	package require BLT
17	#package require Img
18
19	option add *VtkVolumeViewer.width 4i widgetDefault
20	option add VtkVolumeViewercursor crosshair widgetDefault
21	option add *VtkVolumeViewer.height 4i widgetDefault
22	option add *VtkVolumeViewer.foreground black widgetDefault
23	option add *VtkVolumeViewer.controlBackground gray widgetDefault
24	option add *VtkVolumeViewer.controlDarkBackground #999999 widgetDefault
25	option add *VtkVolumeViewer.plotBackground black widgetDefault
26	option add *VtkVolumeViewer.plotForeground white widgetDefault
27	option add *VtkVolumeViewer.font \
28	--helvetica-medium-r-normal--12-* widgetDefault
29
30	# must use this name -- plugs into Rappture::resources::load
31	proc VtkVolumeViewer_init_resources {} {
32	Rappture::resources::register \
33	vtkvis_server Rappture::VtkVolumeViewer::SetServerList
34	}
35
36	itcl::class Rappture::VtkVolumeViewer {
37	inherit Rappture::VisViewer
38
39	itk_option define -plotforeground plotForeground Foreground ""
40	itk_option define -plotbackground plotBackground Background ""
41
42	constructor { hostlist args } {
43	Rappture::VisViewer::constructor $hostlist
44	} {
45	# defined below
46	}
47	destructor {
48	# defined below
49	}
50	public proc SetServerList { namelist } {
51	Rappture::VisViewer::SetServerList "vtkvis" $namelist
52	}
53	public method add {dataobj {settings ""}}
54	public method camera {option args}
55	public method delete {args}
56	public method disconnect {}
57	public method download {option args}
58	public method get {args}
59	public method isconnected {}
60	public method parameters {title args} {
61	# do nothing
62	}
63	public method scale {args}
64	public method updateTransferFunctions {}
65
66	private method BuildViewTab {}
67	private method BuildVolumeComponents {}
68	private method ComputeAlphamap { cname }
69	private method ComputeTransferFunction { cname }
70	private method GetColormap { cname color }
71	private method GetDatasetsWithComponent { cname }
72	private method HideAllMarkers {}
73	private method AddNewMarker { x y }
74	private method InitComponentSettings { cname }
75	private method ParseLevelsOption { cname levels }
76	private method ParseMarkersOption { cname markers }
77	private method ResetColormap { cname color }
78	private method SendTransferFunctions {}
79	private method SetInitialTransferFunction { dataobj cname }
80	private method SetOrientation { side }
81	private method SwitchComponent { cname }
82	private method RemoveMarker { x y }
83
84	private variable _current ""; # Currently selected component
85	private variable _volcomponents ; # Array of components found
86	private variable _componentsList ; # Array of components found
87	private variable _cname2style
88	private variable _cname2transferFunction
89	private variable _cname2defaultcolormap
90	private variable _cname2defaultalphamap
91
92	private variable _parsedFunction
93	private variable _transferFunctionEditors
94
95	protected method Connect {}
96	protected method CurrentDatasets {args}
97	protected method Disconnect {}
98	protected method DoResize {}
99	protected method DoRotate {}
100	protected method AdjustSetting {what {value ""}}
101	protected method InitSettings { args }
102	protected method Pan {option x y}
103	protected method Pick {x y}
104	protected method Rebuild {}
105	protected method ReceiveDataset { args }
106	protected method ReceiveImage { args }
107	protected method ReceiveLegend { colormap title vmin vmax size }
108	protected method Rotate {option x y}
109	protected method Zoom {option}
110
111	# The following methods are only used by this class.
112
113	private method BuildAxisTab {}
114	private method BuildCameraTab {}
115	private method BuildCutplaneTab {}
116	private method BuildDownloadPopup { widget command }
117	private method BuildVolumeTab {}
118	private method DrawLegend {}
119	private method DrawLegendOld {}
120	private method Combo { option }
121	private method EnterLegend { x y }
122	private method EventuallyResize { w h }
123	private method EventuallyRequestLegend {}
124	private method EventuallyRotate { q }
125	private method EventuallySetCutplane { axis args }
126	private method GetImage { args }
127	private method GetVtkData { args }
128	private method IsValidObject { dataobj }
129	private method LeaveLegend {}
130	private method MotionLegend { x y }
131	private method PanCamera {}
132	private method RequestLegend {}
133	private method SetLegendTip { x y }
134	private method SetObjectStyle { dataobj comp }
135	private method Slice {option args}
136
137	private variable _arcball ""
138	private variable _dlist "" ; # list of data objects
139	private variable _obj2datasets
140	private variable _obj2ovride ; # maps dataobj => style override
141	private variable _datasets ; # contains all the dataobj-component
142	; # datasets in the server
143	private variable _colormaps ; # contains all the colormaps
144	; # in the server.
145	private variable _dataset2style ;# maps dataobj-component to transfunc
146
147	private variable _click ; # info used for rotate operations
148	private variable _limits ; # autoscale min/max for all axes
149	private variable _view ; # view params for 3D view
150	private variable _settings
151	private variable _style; # Array of current component styles.
152	private variable _initialStyle; # Array of initial component styles.
153	private variable _reset 1; # indicates if camera needs to be reset
154	# to starting position.
155
156	private variable _first "" ; # This is the topmost dataset.
157	private variable _start 0
158	private variable _title ""
159	private variable _seeds
160
161	common _downloadPopup; # download options from popup
162	private common _hardcopy
163	private variable _width 0
164	private variable _height 0
165	private variable _resizePending 0
166	private variable _rotatePending 0
167	private variable _cutplanePending 0
168	private variable _legendPending 0
169	private variable _fields
170	private variable _curFldName ""
171	private variable _curFldLabel ""
172	private variable _cutplaneCmd "imgcutplane"
173	private variable _activeVolumes; # Array of volumes that are active.
174	}
175
176	itk::usual VtkVolumeViewer {
177	keep -background -foreground -cursor -font
178	keep -plotbackground -plotforeground
179	}
180
181	# ----------------------------------------------------------------------
182	# CONSTRUCTOR
183	# ----------------------------------------------------------------------
184	itcl::body Rappture::VtkVolumeViewer::constructor {hostlist args} {
185	package require vtk
186	set _serverType "vtkvis"
187
188	EnableWaitDialog 900
189
190	# Rebuild event
191	$_dispatcher register !rebuild
192	$_dispatcher dispatch $this !rebuild "[itcl::code $this Rebuild]; list"
193
194	# Resize event
195	$_dispatcher register !resize
196	$_dispatcher dispatch $this !resize "[itcl::code $this DoResize]; list"
197
198	# Rotate event
199	$_dispatcher register !rotate
200	$_dispatcher dispatch $this !rotate "[itcl::code $this DoRotate]; list"
201
202	# Legend event
203	$_dispatcher register !legend
204	$_dispatcher dispatch $this !legend "[itcl::code $this RequestLegend]; list"
205
206	# X-Cutplane event
207	$_dispatcher register !xcutplane
208	$_dispatcher dispatch $this !xcutplane \
209	"[itcl::code $this AdjustSetting cutplanePositionX]; list"
210
211	# Y-Cutplane event
212	$_dispatcher register !ycutplane
213	$_dispatcher dispatch $this !ycutplane \
214	"[itcl::code $this AdjustSetting cutplanePositionY]; list"
215
216	# Z-Cutplane event
217	$_dispatcher register !zcutplane
218	$_dispatcher dispatch $this !zcutplane \
219	"[itcl::code $this AdjustSetting cutplanePositionZ]; list"
220
221	#
222	# Populate parser with commands handle incoming requests
223	#
224	$_parser alias image [itcl::code $this ReceiveImage]
225	$_parser alias dataset [itcl::code $this ReceiveDataset]
226	$_parser alias legend [itcl::code $this ReceiveLegend]
227
228	# Initialize the view to some default parameters.
229	array set _view {
230	qw 0.853553
231	qx -0.353553
232	qy 0.353553
233	qz 0.146447
234	zoom 1.0
235	xpan 0
236	ypan 0
237	ortho 0
238	}
239	set _arcball [blt::arcball create 100 100]
240	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
241	$_arcball quaternion $q
242
243	array set _settings {
244	axesVisible 1
245	axisGridX 0
246	axisGridY 0
247	axisGridZ 0
248	axisLabels 1
249	background black
250	cutplaneEdges 0
251	cutplaneLighting 1
252	cutplaneOpacity 100
253	cutplanePositionX 50
254	cutplanePositionY 50
255	cutplanePositionZ 50
256	cutplaneVisible 0
257	cutplaneVisibleX 1
258	cutplaneVisibleY 1
259	cutplaneVisibleZ 1
260	cutplaneWireframe 0
261	legendVisible 1
262	outline 0
263	volumeAmbient 40
264	volumeBlendMode composite
265	volumeDiffuse 60
266	volumeLighting 1
267	volumeOpacity 50
268	volumeQuality 80
269	volumeSpecularExponent 90
270	volumeSpecularLevel 30
271	volumeThickness 350
272	volumeVisible 1
273	}
274
275	itk_component add view {
276	canvas $itk_component(plotarea).view \
277	-highlightthickness 0 -borderwidth 0
278	} {
279	usual
280	ignore -highlightthickness -borderwidth -background
281	}
282
283	itk_component add fieldmenu {
284	menu $itk_component(plotarea).menu -bg black -fg white -relief flat \
285	-tearoff no
286	} {
287	usual
288	ignore -background -foreground -relief -tearoff
289	}
290	set c $itk_component(view)
291	bind $c <Configure> [itcl::code $this EventuallyResize %w %h]
292	bind $c <4> [itcl::code $this Zoom in 0.25]
293	bind $c <5> [itcl::code $this Zoom out 0.25]
294	bind $c <KeyPress-Left> [list %W xview scroll 10 units]
295	bind $c <KeyPress-Right> [list %W xview scroll -10 units]
296	bind $c <KeyPress-Up> [list %W yview scroll 10 units]
297	bind $c <KeyPress-Down> [list %W yview scroll -10 units]
298	bind $c <Enter> "focus %W"
299	bind $c <Control-F1> [itcl::code $this ToggleConsole]
300
301	# Fixes the scrollregion in case we go off screen
302	$c configure -scrollregion [$c bbox all]
303
304	set _map(id) [$c create image 0 0 -anchor nw -image $_image(plot)]
305	set _map(cwidth) -1
306	set _map(cheight) -1
307	set _map(zoom) 1.0
308	set _map(original) ""
309
310	set f [$itk_component(main) component controls]
311	itk_component add reset {
312	button $f.reset -borderwidth 1 -padx 1 -pady 1 \
313	-highlightthickness 0 \
314	-image [Rappture::icon reset-view] \
315	-command [itcl::code $this Zoom reset]
316	} {
317	usual
318	ignore -highlightthickness
319	}
320	pack $itk_component(reset) -side top -padx 2 -pady 2
321	Rappture::Tooltip::for $itk_component(reset) "Reset the view to the default zoom level"
322
323	itk_component add zoomin {
324	button $f.zin -borderwidth 1 -padx 1 -pady 1 \
325	-highlightthickness 0 \
326	-image [Rappture::icon zoom-in] \
327	-command [itcl::code $this Zoom in]
328	} {
329	usual
330	ignore -highlightthickness
331	}
332	pack $itk_component(zoomin) -side top -padx 2 -pady 2
333	Rappture::Tooltip::for $itk_component(zoomin) "Zoom in"
334
335	itk_component add zoomout {
336	button $f.zout -borderwidth 1 -padx 1 -pady 1 \
337	-highlightthickness 0 \
338	-image [Rappture::icon zoom-out] \
339	-command [itcl::code $this Zoom out]
340	} {
341	usual
342	ignore -highlightthickness
343	}
344	pack $itk_component(zoomout) -side top -padx 2 -pady 2
345	Rappture::Tooltip::for $itk_component(zoomout) "Zoom out"
346
347	itk_component add volume {
348	Rappture::PushButton $f.volume \
349	-onimage [Rappture::icon volume-on] \
350	-offimage [Rappture::icon volume-off] \
351	-variable [itcl::scope _settings(volumeVisible)] \
352	-command [itcl::code $this AdjustSetting volumeVisible]
353	}
354	$itk_component(volume) select
355	Rappture::Tooltip::for $itk_component(volume) \
356	"Don't display the volume"
357	pack $itk_component(volume) -padx 2 -pady 2
358
359	itk_component add cutplane {
360	Rappture::PushButton $f.cutplane \
361	-onimage [Rappture::icon cutbutton] \
362	-offimage [Rappture::icon cutbutton] \
363	-variable [itcl::scope _settings(cutplaneVisible)] \
364	-command [itcl::code $this AdjustSetting cutplaneVisible]
365	}
366	Rappture::Tooltip::for $itk_component(cutplane) \
367	"Show/Hide cutplanes"
368	pack $itk_component(cutplane) -padx 2 -pady 2
369
370
371	if { [catch {
372	BuildViewTab
373	BuildVolumeTab
374	BuildCutplaneTab
375	BuildAxisTab
376	BuildCameraTab
377	} errs] != 0 } {
378	puts stderr errs=$errs
379	}
380	# Legend
381
382	set _image(legend) [image create photo]
383	itk_component add legend {
384	canvas $itk_component(plotarea).legend -height 50 -highlightthickness 0
385	} {
386	usual
387	ignore -highlightthickness
388	rename -background -plotbackground plotBackground Background
389	}
390	bind $itk_component(legend) <KeyPress-Delete> \
391	[itcl::code $this RemoveMarker %x %y]
392	bind $itk_component(legend) <Enter> \
393	[list focus $itk_component(legend)]
394
395	# Hack around the Tk panewindow. The problem is that the requested
396	# size of the 3d view isn't set until an image is retrieved from
397	# the server. So the panewindow uses the tiny size.
398	set w 10000
399	pack forget $itk_component(view)
400	blt::table $itk_component(plotarea) \
401	0,0 $itk_component(view) -fill both -reqwidth $w \
402	1,0 $itk_component(legend) -fill x
403	blt::table configure $itk_component(plotarea) r1 -resize none
404
405	# Bindings for rotation via mouse
406	bind $itk_component(view) <ButtonPress-1> \
407	[itcl::code $this Rotate click %x %y]
408	bind $itk_component(view) <B1-Motion> \
409	[itcl::code $this Rotate drag %x %y]
410	bind $itk_component(view) <ButtonRelease-1> \
411	[itcl::code $this Rotate release %x %y]
412	bind $itk_component(view) <Configure> \
413	[itcl::code $this EventuallyResize %w %h]
414
415	if 0 {
416	bind $itk_component(view) <Configure> \
417	[itcl::code $this EventuallyResize %w %h]
418	}
419	# Bindings for panning via mouse
420	bind $itk_component(view) <ButtonPress-2> \
421	[itcl::code $this Pan click %x %y]
422	bind $itk_component(view) <B2-Motion> \
423	[itcl::code $this Pan drag %x %y]
424	bind $itk_component(view) <ButtonRelease-2> \
425	[itcl::code $this Pan release %x %y]
426
427	#bind $itk_component(view) <ButtonRelease-3> \
428	# [itcl::code $this Pick %x %y]
429
430	# Bindings for panning via keyboard
431	bind $itk_component(view) <KeyPress-Left> \
432	[itcl::code $this Pan set -10 0]
433	bind $itk_component(view) <KeyPress-Right> \
434	[itcl::code $this Pan set 10 0]
435	bind $itk_component(view) <KeyPress-Up> \
436	[itcl::code $this Pan set 0 -10]
437	bind $itk_component(view) <KeyPress-Down> \
438	[itcl::code $this Pan set 0 10]
439	bind $itk_component(view) <Shift-KeyPress-Left> \
440	[itcl::code $this Pan set -2 0]
441	bind $itk_component(view) <Shift-KeyPress-Right> \
442	[itcl::code $this Pan set 2 0]
443	bind $itk_component(view) <Shift-KeyPress-Up> \
444	[itcl::code $this Pan set 0 -2]
445	bind $itk_component(view) <Shift-KeyPress-Down> \
446	[itcl::code $this Pan set 0 2]
447
448	# Bindings for zoom via keyboard
449	bind $itk_component(view) <KeyPress-Prior> \
450	[itcl::code $this Zoom out]
451	bind $itk_component(view) <KeyPress-Next> \
452	[itcl::code $this Zoom in]
453
454	bind $itk_component(view) <Enter> "focus $itk_component(view)"
455
456	if {[string equal "x11" [tk windowingsystem]]} {
457	# Bindings for zoom via mouse
458	bind $itk_component(view) <4> [itcl::code $this Zoom out]
459	bind $itk_component(view) <5> [itcl::code $this Zoom in]
460	}
461
462	set _image(download) [image create photo]
463
464	eval itk_initialize $args
465	Connect
466	}
467
468	# ----------------------------------------------------------------------
469	# DESTRUCTOR
470	# ----------------------------------------------------------------------
471	itcl::body Rappture::VtkVolumeViewer::destructor {} {
472	Disconnect
473	image delete $_image(plot)
474	image delete $_image(download)
475	catch { blt::arcball destroy $_arcball }
476	}
477
478	itcl::body Rappture::VtkVolumeViewer::DoResize {} {
479	if { $_width < 2 } {
480	set _width 500
481	}
482	if { $_height < 2 } {
483	set _height 500
484	}
485	set _start [clock clicks -milliseconds]
486	SendCmd "screen size $_width $_height"
487
488	EventuallyRequestLegend
489	set _resizePending 0
490	}
491
492	itcl::body Rappture::VtkVolumeViewer::DoRotate {} {
493	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
494	SendCmd "camera orient $q"
495	set _rotatePending 0
496	}
497
498	itcl::body Rappture::VtkVolumeViewer::EventuallyResize { w h } {
499	set _width $w
500	set _height $h
501	$_arcball resize $w $h
502	if { !$_resizePending } {
503	set _resizePending 1
504	$_dispatcher event -after 400 !resize
505	}
506	}
507
508	itcl::body Rappture::VtkVolumeViewer::EventuallyRequestLegend {} {
509	if { !$_legendPending } {
510	set _legendPending 1
511	$_dispatcher event -idle !legend
512	}
513	}
514
515	set rotate_delay 100
516
517	itcl::body Rappture::VtkVolumeViewer::EventuallyRotate { q } {
518	foreach { _view(qw) _view(qx) _view(qy) _view(qz) } $q break
519	if { !$_rotatePending } {
520	set _rotatePending 1
521	global rotate_delay
522	$_dispatcher event -after $rotate_delay !rotate
523	}
524	}
525
526	itcl::body Rappture::VtkVolumeViewer::EventuallySetCutplane { axis args } {
527	if { !$_cutplanePending } {
528	set _cutplanePending 1
529	$_dispatcher event -after 100 !${axis}cutplane
530	}
531	}
532
533	# ----------------------------------------------------------------------
534	# USAGE: add <dataobj> ?<settings>?
535	#
536	# Clients use this to add a data object to the plot. The optional
537	# <settings> are used to configure the plot. Allowed settings are
538	# -color, -brightness, -width, -linestyle, and -raise.
539	# ----------------------------------------------------------------------
540	itcl::body Rappture::VtkVolumeViewer::add {dataobj {settings ""}} {
541	if { ![IsValidObject $dataobj] } {
542	return; # Ignore invalid objects.
543	}
544	array set params {
545	-color auto
546	-width 1
547	-linestyle solid
548	-brightness 0
549	-raise 0
550	-description ""
551	-param ""
552	-type ""
553	}
554	array set params $settings
555	set params(-description) ""
556	set params(-param) ""
557	array set params $settings
558
559	if {$params(-color) == "auto" \|\| $params(-color) == "autoreset"} {
560	# can't handle -autocolors yet
561	set params(-color) black
562	}
563	set pos [lsearch -exact $_dlist $dataobj]
564	if {$pos < 0} {
565	lappend _dlist $dataobj
566	}
567	set _obj2ovride($dataobj-color) $params(-color)
568	set _obj2ovride($dataobj-width) $params(-width)
569	set _obj2ovride($dataobj-raise) $params(-raise)
570	$_dispatcher event -idle !rebuild
571	}
572
573
574	# ----------------------------------------------------------------------
575	# USAGE: delete ?<dataobj1> <dataobj2> ...?
576	#
577	# Clients use this to delete a dataobj from the plot. If no dataobjs
578	# are specified, then all dataobjs are deleted. No data objects are
579	# deleted. They are only removed from the display list.
580	#
581	# ----------------------------------------------------------------------
582	itcl::body Rappture::VtkVolumeViewer::delete {args} {
583	if { [llength $args] == 0} {
584	set args $_dlist
585	}
586	# Delete all specified dataobjs
587	set changed 0
588	foreach dataobj $args {
589	set pos [lsearch -exact $_dlist $dataobj]
590	if { $pos < 0 } {
591	continue; # Don't know anything about it.
592	}
593	# Remove it from the dataobj list.
594	set _dlist [lreplace $_dlist $pos $pos]
595	array unset _obj2ovride $dataobj-*
596	array unset _settings $dataobj-*
597	set changed 1
598	}
599	# If anything changed, then rebuild the plot
600	if { $changed } {
601	$_dispatcher event -idle !rebuild
602	}
603	}
604
605	# ----------------------------------------------------------------------
606	# USAGE: get ?-objects?
607	# USAGE: get ?-visible?
608	# USAGE: get ?-image view?
609	#
610	# Clients use this to query the list of objects being plotted, in
611	# order from bottom to top of this result. The optional "-image"
612	# flag can also request the internal images being shown.
613	# ----------------------------------------------------------------------
614	itcl::body Rappture::VtkVolumeViewer::get {args} {
615	if {[llength $args] == 0} {
616	set args "-objects"
617	}
618
619	set op [lindex $args 0]
620	switch -- $op {
621	"-objects" {
622	# put the dataobj list in order according to -raise options
623	set dlist {}
624	foreach dataobj $_dlist {
625	if { ![IsValidObject $dataobj] } {
626	continue
627	}
628	if {[info exists _obj2ovride($dataobj-raise)] &&
629	$_obj2ovride($dataobj-raise)} {
630	set dlist [linsert $dlist 0 $dataobj]
631	} else {
632	lappend dlist $dataobj
633	}
634	}
635	return $dlist
636	}
637	"-visible" {
638	set dlist {}
639	foreach dataobj $_dlist {
640	if { ![IsValidObject $dataobj] } {
641	continue
642	}
643	if { ![info exists _obj2ovride($dataobj-raise)] } {
644	# No setting indicates that the object isn't visible.
645	continue
646	}
647	# Otherwise use the -raise parameter to put the object to
648	# the front of the list.
649	if { $_obj2ovride($dataobj-raise) } {
650	set dlist [linsert $dlist 0 $dataobj]
651	} else {
652	lappend dlist $dataobj
653	}
654	}
655	return $dlist
656	}
657	-image {
658	if {[llength $args] != 2} {
659	error "wrong # args: should be \"get -image view\""
660	}
661	switch -- [lindex $args end] {
662	view {
663	return $_image(plot)
664	}
665	default {
666	error "bad image name \"[lindex $args end]\": should be view"
667	}
668	}
669	}
670	default {
671	error "bad option \"$op\": should be -objects or -image"
672	}
673	}
674	}
675
676	# ----------------------------------------------------------------------
677	# USAGE: scale ?<data1> <data2> ...?
678	#
679	# Sets the default limits for the overall plot according to the
680	# limits of the data for all of the given <data> objects. This
681	# accounts for all objects--even those not showing on the screen.
682	# Because of this, the limits are appropriate for all objects as
683	# the user scans through data in the ResultSet viewer.
684	# ----------------------------------------------------------------------
685	itcl::body Rappture::VtkVolumeViewer::scale {args} {
686	array set style {
687	-color BCGYR
688	-levels 6
689	-opacity 1.0
690	-markers ""
691	}
692	array unset _limits
693	array unset _volcomponents
694
695	foreach dataobj $args {
696	if { ![$dataobj isvalid] } {
697	continue; # Object doesn't contain valid data.
698	}
699	# Determine limits for each axis.
700	foreach axis {x y z v} {
701	foreach { min max } [$dataobj limits $axis] break
702	if {"" != $min && "" != $max} {
703	if { ![info exists _limits($axis)] } {
704	set _limits($axis) [list $min $max]
705	} else {
706	foreach {amin amax} $_limits($axis) break
707	if {$min < $amin} {
708	set amin $min
709	}
710	if {$max > $amax} {
711	set amax $max
712	}
713	set _limits($axis) [list $amin $amax]
714	}
715	}
716	}
717	# Determine limits for each field.
718	foreach { fname lim } [$dataobj fieldlimits] {
719	if { ![info exists _limits($fname)] } {
720	set _limits($fname) $lim
721	continue
722	}
723	foreach {min max} $lim break
724	foreach {fmin fmax} $_limits($fname) break
725	if { $fmin > $min } {
726	set fmin $min
727	}
728	if { $fmax < $max } {
729	set fmax $max
730	}
731	set _limits($fname) [list $fmin $fmax]
732	}
733	# Get limits for each component.
734	foreach cname [$dataobj components] {
735	if { ![info exists _volcomponents($cname)] } {
736	lappend _componentsList $cname
737	}
738	lappend _volcomponents($cname) $dataobj-$cname
739	array unset limits
740	array set limits [$dataobj valueLimits $cname]
741	foreach {min max} $limits(v) break
742	if { ![info exists _limits($cname)] } {
743	set _limits($cname) [list $min $max]
744	} else {
745	foreach {vmin vmax} $_limits($cname) break
746	if { $min < $vmin } {
747	set vmin $min
748	}
749	if { $max > $vmax } {
750	set vmax $max
751	}
752	set _limits($cname) [list $vmin $vmax]
753	}
754	}
755	}
756	BuildVolumeComponents
757	updateTransferFunctions
758	}
759
760	# ----------------------------------------------------------------------
761	# USAGE: download coming
762	# USAGE: download controls <downloadCommand>
763	# USAGE: download now
764	#
765	# Clients use this method to create a downloadable representation
766	# of the plot. Returns a list of the form {ext string}, where
767	# "ext" is the file extension (indicating the type of data) and
768	# "string" is the data itself.
769	# ----------------------------------------------------------------------
770	itcl::body Rappture::VtkVolumeViewer::download {option args} {
771	switch $option {
772	coming {
773	if {[catch {
774	blt::winop snap $itk_component(plotarea) $_image(download)
775	}]} {
776	$_image(download) configure -width 1 -height 1
777	$_image(download) put #000000
778	}
779	}
780	controls {
781	set popup .vtkviewerdownload
782	if { ![winfo exists .vtkviewerdownload] } {
783	set inner [BuildDownloadPopup $popup [lindex $args 0]]
784	} else {
785	set inner [$popup component inner]
786	}
787	set _downloadPopup(image_controls) $inner.image_frame
788	set num [llength [get]]
789	set num [expr {($num == 1) ? "1 result" : "$num results"}]
790	set word [Rappture::filexfer::label downloadWord]
791	$inner.summary configure -text "$word $num in the following format:"
792	update idletasks ;# Fix initial sizes
793	return $popup
794	}
795	now {
796	set popup .vtkviewerdownload
797	if {[winfo exists .vtkviewerdownload]} {
798	$popup deactivate
799	}
800	switch -- $_downloadPopup(format) {
801	"image" {
802	return [$this GetImage [lindex $args 0]]
803	}
804	"vtk" {
805	return [$this GetVtkData [lindex $args 0]]
806	}
807	}
808	return ""
809	}
810	default {
811	error "bad option \"$option\": should be coming, controls, now"
812	}
813	}
814	}
815
816	# ----------------------------------------------------------------------
817	# USAGE: Connect ?<host:port>,<host:port>...?
818	#
819	# Clients use this method to establish a connection to a new
820	# server, or to reestablish a connection to the previous server.
821	# Any existing connection is automatically closed.
822	# ----------------------------------------------------------------------
823	itcl::body Rappture::VtkVolumeViewer::Connect {} {
824	set _hosts [GetServerList "vtkvis"]
825	if { "" == $_hosts } {
826	return 0
827	}
828	set result [VisViewer::Connect $_hosts]
829	if { $result } {
830	if { $_reportClientInfo } {
831	# Tell the server the viewer, hub, user and session.
832	# Do this immediately on connect before buffering any commands
833	global env
834
835	set info {}
836	set user "???"
837	if { [info exists env(USER)] } {
838	set user $env(USER)
839	}
840	set session "???"
841	if { [info exists env(SESSION)] } {
842	set session $env(SESSION)
843	}
844	lappend info "hub" [exec hostname]
845	lappend info "client" "vtkvolumeviewer"
846	lappend info "user" $user
847	lappend info "session" $session
848	SendCmd "clientinfo [list $info]"
849	}
850
851	set w [winfo width $itk_component(view)]
852	set h [winfo height $itk_component(view)]
853	EventuallyResize $w $h
854	}
855	return $result
856	}
857
858	#
859	# isconnected --
860	#
861	# Indicates if we are currently connected to the visualization server.
862	#
863	itcl::body Rappture::VtkVolumeViewer::isconnected {} {
864	return [VisViewer::IsConnected]
865	}
866
867	#
868	# disconnect --
869	#
870	itcl::body Rappture::VtkVolumeViewer::disconnect {} {
871	Disconnect
872	}
873
874	#
875	# Disconnect --
876	#
877	# Clients use this method to disconnect from the current rendering
878	# server.
879	#
880	itcl::body Rappture::VtkVolumeViewer::Disconnect {} {
881	VisViewer::Disconnect
882
883	$_dispatcher cancel !rebuild
884	$_dispatcher cancel !resize
885	$_dispatcher cancel !rotate
886	$_dispatcher cancel !xcutplane
887	$_dispatcher cancel !ycutplane
888	$_dispatcher cancel !zcutplane
889	$_dispatcher cancel !legend
890	# disconnected -- no more data sitting on server
891	set _outbuf ""
892	array unset _datasets
893	array unset _data
894	array unset _colormaps
895	array unset _seeds
896	array unset _dataset2style
897	array unset _obj2datasets
898
899	array unset _cname2style
900	array unset _parsedFunction
901	array unset _cname2transferFunction
902
903	set _resizePending 0
904	set _rotatePending 0
905	set _cutplanePending 0
906	set _legendPending 0
907	set _reset 1
908	}
909
910	# ----------------------------------------------------------------------
911	# USAGE: ReceiveImage -bytes <size> -type <type> -token <token>
912	#
913	# Invoked automatically whenever the "image" command comes in from
914	# the rendering server. Indicates that binary image data with the
915	# specified <size> will follow.
916	# ----------------------------------------------------------------------
917	itcl::body Rappture::VtkVolumeViewer::ReceiveImage { args } {
918	array set info {
919	-token "???"
920	-bytes 0
921	-type image
922	}
923	array set info $args
924	set bytes [ReceiveBytes $info(-bytes)]
925	StopWaiting
926	if { $info(-type) == "image" } {
927	if 0 {
928	set f [open "last.ppm" "w"]
929	puts $f $bytes
930	close $f
931	}
932	$_image(plot) configure -data $bytes
933	set time [clock seconds]
934	set date [clock format $time]
935	#puts stderr "$date: received image [image width $_image(plot)]x[image height $_image(plot)] image>"
936	if { $_start > 0 } {
937	set finish [clock clicks -milliseconds]
938	#puts stderr "round trip time [expr $finish -$_start] milliseconds"
939	set _start 0
940	}
941	} elseif { $info(type) == "print" } {
942	set tag $this-print-$info(-token)
943	set _hardcopy($tag) $bytes
944	}
945	}
946
947	#
948	# ReceiveDataset --
949	#
950	itcl::body Rappture::VtkVolumeViewer::ReceiveDataset { args } {
951	if { ![isconnected] } {
952	return
953	}
954	set option [lindex $args 0]
955	switch -- $option {
956	"scalar" {
957	set option [lindex $args 1]
958	switch -- $option {
959	"world" {
960	foreach { x y z value tag } [lrange $args 2 end] break
961	}
962	"pixel" {
963	foreach { x y value tag } [lrange $args 2 end] break
964	}
965	}
966	}
967	"vector" {
968	set option [lindex $args 1]
969	switch -- $option {
970	"world" {
971	foreach { x y z vx vy vz tag } [lrange $args 2 end] break
972	}
973	"pixel" {
974	foreach { x y vx vy vz tag } [lrange $args 2 end] break
975	}
976	}
977	}
978	"names" {
979	foreach { name } [lindex $args 1] {
980	#puts stderr "Dataset: $name"
981	}
982	}
983	default {
984	error "unknown dataset option \"$option\" from server"
985	}
986	}
987	}
988
989	# ----------------------------------------------------------------------
990	# USAGE: Rebuild
991	#
992	# Called automatically whenever something changes that affects the
993	# data in the widget. Clears any existing data and rebuilds the
994	# widget to display new data.
995	# ----------------------------------------------------------------------
996	itcl::body Rappture::VtkVolumeViewer::Rebuild {} {
997	update
998	set w [winfo width $itk_component(view)]
999	set h [winfo height $itk_component(view)]
1000	if { $w < 2 \|\| $h < 2 } {
1001	$_dispatcher event -idle !rebuild
1002	return
1003	}
1004
1005	# Turn on buffering of commands to the server. We don't want to
1006	# be preempted by a server disconnect/reconnect (which automatically
1007	# generates a new call to Rebuild).
1008	StartBufferingCommands
1009
1010	if { $_reset } {
1011	set _width $w
1012	set _height $h
1013	$_arcball resize $w $h
1014	DoResize
1015	#
1016	# Reset the camera and other view parameters
1017	#
1018	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
1019	$_arcball quaternion $q
1020	if {$_view(ortho)} {
1021	SendCmd "camera mode ortho"
1022	} else {
1023	SendCmd "camera mode persp"
1024	}
1025	DoRotate
1026	InitSettings outline background axisGridX axisGridY axisGridZ axisFlyMode \
1027	axesVisible axisLabels
1028	PanCamera
1029	}
1030	set _first ""
1031
1032	SendCmd "imgflush"
1033	set _first ""
1034
1035	SendCmd "volume visible 0"
1036
1037	# No volumes are active (i.e. in the working set of displayed volumes).
1038	# A volume is always invisible if it's not in the working set. A
1039	# volume in the working set may be visible/invisible depending upon the
1040	# global visibility value.
1041	array unset _activeVolumes
1042	foreach dataobj [get -objects] {
1043	if { [info exists _obj2ovride($dataobj-raise)] && $_first == "" } {
1044	set _first $dataobj
1045	}
1046	set _obj2datasets($dataobj) ""
1047	foreach comp [$dataobj components] {
1048	set tag $dataobj-$comp
1049	if { ![info exists _datasets($tag)] } {
1050	set bytes [$dataobj vtkdata $comp]
1051	set length [string length $bytes]
1052	if { $_reportClientInfo } {
1053	set info {}
1054	lappend info "tool_id" [$dataobj hints toolId]
1055	lappend info "tool_name" [$dataobj hints toolName]
1056	lappend info "tool_version" [$dataobj hints toolRevision]
1057	lappend info "tool_title" [$dataobj hints toolTitle]
1058	lappend info "dataset_label" [$dataobj hints label]
1059	lappend info "dataset_size" $length
1060	lappend info "dataset_tag" $tag
1061	SendCmd [list "clientinfo" $info]
1062	}
1063	append _outbuf "dataset add $tag data follows $length\n"
1064	append _outbuf $bytes
1065	set _datasets($tag) 1
1066	SetObjectStyle $dataobj $comp
1067	}
1068	lappend _obj2datasets($dataobj) $tag
1069	if { [info exists _obj2ovride($dataobj-raise)] } {
1070	SendCmd "volume visible 1 $tag"
1071	}
1072	break
1073	}
1074	}
1075	if {"" != $_first} {
1076	set location [$_first hints camera]
1077	if { $location != "" } {
1078	array set view $location
1079	}
1080
1081	foreach axis { x y z } {
1082	set label [$_first hints ${axis}label]
1083	if { $label != "" } {
1084	SendCmd "axis name $axis $label"
1085	}
1086	set units [$_first hints ${axis}units]
1087	if { $units != "" } {
1088	SendCmd "axis units $axis $units"
1089	}
1090	}
1091	$itk_component(field) choices delete 0 end
1092	$itk_component(fieldmenu) delete 0 end
1093	array unset _fields
1094	set _curFldName ""
1095	foreach cname [$_first components] {
1096	foreach fname [$_first fieldnames $cname] {
1097	if { [info exists _fields($fname)] } {
1098	continue
1099	}
1100	foreach { label units components } \
1101	[$_first fieldinfo $fname] break
1102	# Only scalar fields are valid
1103	if {$components == 1} {
1104	$itk_component(field) choices insert end "$fname" "$label"
1105	$itk_component(fieldmenu) add radiobutton -label "$label" \
1106	-value $label -variable [itcl::scope _curFldLabel] \
1107	-selectcolor red \
1108	-activebackground $itk_option(-plotbackground) \
1109	-activeforeground $itk_option(-plotforeground) \
1110	-font "Arial 8" \
1111	-command [itcl::code $this Combo invoke]
1112	set _fields($fname) [list $label $units $components]
1113	if { $_curFldName == "" } {
1114	set _curFldName $fname
1115	set _curFldLabel $label
1116	}
1117	}
1118	}
1119	}
1120	$itk_component(field) value $_curFldLabel
1121	}
1122
1123	InitSettings volumeColormap \
1124	volumeAmbient volumeDiffuse volumeSpecularLevel volumeSpecularExponent \
1125	volumeBlendMode volumeThickness \
1126	volumeOpacity volumeQuality volumeVisible \
1127	cutplaneVisible \
1128	cutplanePositionX cutplanePositionY cutplanePositionZ \
1129	cutplaneVisibleX cutplaneVisibleY cutplaneVisibleZ
1130
1131	if { $_reset } {
1132	InitSettings volumeLighting
1133	SendCmd "camera reset"
1134	SendCmd "camera zoom $_view(zoom)"
1135	RequestLegend
1136	set _reset 0
1137	}
1138	# Actually write the commands to the server socket. If it fails, we don't
1139	# care. We're finished here.
1140	blt::busy hold $itk_component(hull)
1141	StopBufferingCommands
1142	blt::busy release $itk_component(hull)
1143	}
1144
1145	# ----------------------------------------------------------------------
1146	# USAGE: CurrentDatasets ?-all -visible? ?dataobjs?
1147	#
1148	# Returns a list of server IDs for the current datasets being displayed. This
1149	# is normally a single ID, but it might be a list of IDs if the current data
1150	# object has multiple components.
1151	# ----------------------------------------------------------------------
1152	itcl::body Rappture::VtkVolumeViewer::CurrentDatasets {args} {
1153	set flag [lindex $args 0]
1154	switch -- $flag {
1155	"-all" {
1156	if { [llength $args] > 1 } {
1157	error "CurrentDatasets: can't specify dataobj after \"-all\""
1158	}
1159	set dlist [get -objects]
1160	}
1161	"-visible" {
1162	if { [llength $args] > 1 } {
1163	set dlist {}
1164	set args [lrange $args 1 end]
1165	foreach dataobj $args {
1166	if { [info exists _obj2ovride($dataobj-raise)] } {
1167	lappend dlist $dataobj
1168	}
1169	}
1170	} else {
1171	set dlist [get -visible]
1172	}
1173	}
1174	default {
1175	set dlist $args
1176	}
1177	}
1178	set rlist ""
1179	foreach dataobj $dlist {
1180	foreach comp [$dataobj components] {
1181	set tag $dataobj-$comp
1182	if { [info exists _datasets($tag)] && $_datasets($tag) } {
1183	lappend rlist $tag
1184	}
1185	}
1186	}
1187	return $rlist
1188	}
1189
1190	# ----------------------------------------------------------------------
1191	# USAGE: Zoom in
1192	# USAGE: Zoom out
1193	# USAGE: Zoom reset
1194	#
1195	# Called automatically when the user clicks on one of the zoom
1196	# controls for this widget. Changes the zoom for the current view.
1197	# ----------------------------------------------------------------------
1198	itcl::body Rappture::VtkVolumeViewer::Zoom {option} {
1199	switch -- $option {
1200	"in" {
1201	set _view(zoom) [expr {$_view(zoom)*1.25}]
1202	SendCmd "camera zoom $_view(zoom)"
1203	}
1204	"out" {
1205	set _view(zoom) [expr {$_view(zoom)*0.8}]
1206	SendCmd "camera zoom $_view(zoom)"
1207	}
1208	"reset" {
1209	array set _view {
1210	qw 0.853553
1211	qx -0.353553
1212	qy 0.353553
1213	qz 0.146447
1214	zoom 1.0
1215	xpan 0
1216	ypan 0
1217	}
1218	if { $_first != "" } {
1219	set location [$_first hints camera]
1220	if { $location != "" } {
1221	array set _view $location
1222	}
1223	}
1224	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
1225	$_arcball quaternion $q
1226	DoRotate
1227	SendCmd "camera reset"
1228	}
1229	}
1230	}
1231
1232	itcl::body Rappture::VtkVolumeViewer::PanCamera {} {
1233	set x $_view(xpan)
1234	set y $_view(ypan)
1235	SendCmd "camera pan $x $y"
1236	}
1237
1238
1239	# ----------------------------------------------------------------------
1240	# USAGE: Rotate click <x> <y>
1241	# USAGE: Rotate drag <x> <y>
1242	# USAGE: Rotate release <x> <y>
1243	#
1244	# Called automatically when the user clicks/drags/releases in the
1245	# plot area. Moves the plot according to the user's actions.
1246	# ----------------------------------------------------------------------
1247	itcl::body Rappture::VtkVolumeViewer::Rotate {option x y} {
1248	switch -- $option {
1249	"click" {
1250	$itk_component(view) configure -cursor fleur
1251	set _click(x) $x
1252	set _click(y) $y
1253	}
1254	"drag" {
1255	if {[array size _click] == 0} {
1256	Rotate click $x $y
1257	} else {
1258	set w [winfo width $itk_component(view)]
1259	set h [winfo height $itk_component(view)]
1260	if {$w <= 0 \|\| $h <= 0} {
1261	return
1262	}
1263
1264	if {[catch {
1265	# this fails sometimes for no apparent reason
1266	set dx [expr {double($x-$_click(x))/$w}]
1267	set dy [expr {double($y-$_click(y))/$h}]
1268	}]} {
1269	return
1270	}
1271	if { $dx == 0 && $dy == 0 } {
1272	return
1273	}
1274	set q [$_arcball rotate $x $y $_click(x) $_click(y)]
1275	EventuallyRotate $q
1276	set _click(x) $x
1277	set _click(y) $y
1278	}
1279	}
1280	"release" {
1281	Rotate drag $x $y
1282	$itk_component(view) configure -cursor ""
1283	catch {unset _click}
1284	}
1285	default {
1286	error "bad option \"$option\": should be click, drag, release"
1287	}
1288	}
1289	}
1290
1291	itcl::body Rappture::VtkVolumeViewer::Pick {x y} {
1292	foreach tag [CurrentDatasets -visible] {
1293	SendCmd "dataset getscalar pixel $x $y $tag"
1294	}
1295	}
1296
1297	# ----------------------------------------------------------------------
1298	# USAGE: $this Pan click x y
1299	# $this Pan drag x y
1300	# $this Pan release x y
1301	#
1302	# Called automatically when the user clicks on one of the zoom
1303	# controls for this widget. Changes the zoom for the current view.
1304	# ----------------------------------------------------------------------
1305	itcl::body Rappture::VtkVolumeViewer::Pan {option x y} {
1306	switch -- $option {
1307	"set" {
1308	set w [winfo width $itk_component(view)]
1309	set h [winfo height $itk_component(view)]
1310	set x [expr $x / double($w)]
1311	set y [expr $y / double($h)]
1312	set _view(xpan) [expr $_view(xpan) + $x]
1313	set _view(ypan) [expr $_view(ypan) + $y]
1314	PanCamera
1315	return
1316	}
1317	"click" {
1318	set _click(x) $x
1319	set _click(y) $y
1320	$itk_component(view) configure -cursor hand1
1321	}
1322	"drag" {
1323	if { ![info exists _click(x)] } {
1324	set _click(x) $x
1325	}
1326	if { ![info exists _click(y)] } {
1327	set _click(y) $y
1328	}
1329	set w [winfo width $itk_component(view)]
1330	set h [winfo height $itk_component(view)]
1331	set dx [expr ($_click(x) - $x)/double($w)]
1332	set dy [expr ($_click(y) - $y)/double($h)]
1333	set _click(x) $x
1334	set _click(y) $y
1335	set _view(xpan) [expr $_view(xpan) - $dx]
1336	set _view(ypan) [expr $_view(ypan) - $dy]
1337	PanCamera
1338	}
1339	"release" {
1340	Pan drag $x $y
1341	$itk_component(view) configure -cursor ""
1342	}
1343	default {
1344	error "unknown option \"$option\": should set, click, drag, or release"
1345	}
1346	}
1347	}
1348
1349	# ----------------------------------------------------------------------
1350	# USAGE: InitSettings <what> ?<value>?
1351	#
1352	# Used internally to update rendering settings whenever parameters
1353	# change in the popup settings panel. Sends the new settings off
1354	# to the back end.
1355	# ----------------------------------------------------------------------
1356	itcl::body Rappture::VtkVolumeViewer::InitSettings { args } {
1357	foreach spec $args {
1358	if { [info exists _settings($_first-$spec)] } {
1359	# Reset global setting with dataobj specific setting
1360	set _settings($spec) $_settings($_first-$spec)
1361	}
1362	AdjustSetting $spec
1363	}
1364	}
1365
1366	#
1367	# AdjustSetting --
1368	#
1369	# Changes/updates a specific setting in the widget. There are
1370	# usually user-setable option. Commands are sent to the render
1371	# server.
1372	#
1373	itcl::body Rappture::VtkVolumeViewer::AdjustSetting {what {value ""}} {
1374	if { ![isconnected] } {
1375	if { $_reset } {
1376	# Just reconnect if we've been reset.
1377	Connect
1378	}
1379	return
1380	}
1381	switch -- $what {
1382	"background" {
1383	set bgcolor [$itk_component(background) value]
1384	array set fgcolors {
1385	"black" "white"
1386	"white" "black"
1387	"grey" "black"
1388	}
1389	configure -plotbackground $bgcolor \
1390	-plotforeground $fgcolors($bgcolor)
1391	$itk_component(view) delete "legend"
1392	DrawLegend
1393	}
1394	"outline" {
1395	set bool $_settings(outline)
1396	SendCmd "outline visible 0"
1397	foreach tag [GetDatasetsWithComponent $_current] {
1398	SendCmd "outline visible $bool $tag"
1399	}
1400	}
1401	"legendVisible" {
1402	set bool $_settings(legendVisible)
1403	set _settings($_current-legendVisible) $bool
1404	}
1405	"volumeVisible" {
1406	set bool $_settings(volumeVisible)
1407	set _settings($_current-volumeVisible) $bool
1408	# Only the data objects in the array _obj2ovride(*-raise) are
1409	# in the working set and can be displayed on screen. The global
1410	# volume control determines whether they are visible.
1411	#
1412	# Note: The use of the current component is a hold over from
1413	# nanovis. If we can't display more than one volume,
1414	# we don't have to limit the effects to a specific
1415	# component.
1416	foreach tag [GetDatasetsWithComponent $_current] {
1417	foreach {dataobj cname} [split $tag -] break
1418	if { [info exists _obj2ovride($dataobj-raise)] } {
1419	SendCmd "volume visible $bool $tag"
1420	}
1421	}
1422	if { $bool } {
1423	Rappture::Tooltip::for $itk_component(volume) \
1424	"Hide the volume"
1425	} else {
1426	Rappture::Tooltip::for $itk_component(volume) \
1427	"Show the volume"
1428	}
1429	}
1430	"volumeBlendMode" {
1431	set val [$itk_component(blendmode) value]
1432	set mode [$itk_component(blendmode) translate $val]
1433	set _settings(volumeBlendMode) $mode
1434	set _settings($_current-volumeBlendMode) $mode
1435	foreach tag [GetDatasetsWithComponent $_current] {
1436	SendCmd "volume blendmode $mode $tag"
1437	}
1438	}
1439	"volumeAmbient" {
1440	set val $_settings(volumeAmbient)
1441	set _settings($_current-volumeAmbient) $val
1442	set ambient [expr {0.01*$val}]
1443	foreach tag [GetDatasetsWithComponent $_current] {
1444	SendCmd "volume shading ambient $ambient $tag"
1445	}
1446	}
1447	"volumeDiffuse" {
1448	set val $_settings(volumeDiffuse)
1449	set _settings($_current-volumeDiffuse) $val
1450	set diffuse [expr {0.01*$val}]
1451	foreach tag [GetDatasetsWithComponent $_current] {
1452	SendCmd "volume shading diffuse $diffuse $tag"
1453	}
1454	}
1455	"volumeSpecularLevel" - "volumeSpecularExponent" {
1456	set val $_settings(volumeSpecularLevel)
1457	set _settings($_current-volumeSpecularLevel) $val
1458	set level [expr {0.01*$val}]
1459	set exp $_settings(volumeSpecularExponent)
1460	foreach tag [GetDatasetsWithComponent $_current] {
1461	SendCmd "volume shading specular $level $exp $tag"
1462	}
1463	}
1464	"volumeLighting" {
1465	set bool $_settings(volumeLighting)
1466	set _settings($_current-volumeLighting) $bool
1467	foreach tag [GetDatasetsWithComponent $_current] {
1468	SendCmd "volume lighting $bool $tag"
1469	}
1470	}
1471	"volumeOpacity" {
1472	set val $_settings(volumeOpacity)
1473	set _settings($_current-volumeOpacity) $val
1474	set val [expr {0.01*$val}]
1475	foreach tag [GetDatasetsWithComponent $_current] {
1476	SendCmd "volume opacity $val $tag"
1477	}
1478	}
1479	"volumeQuality" {
1480	set val $_settings(volumeQuality)
1481	set _settings($_current-volumeQuality) $val
1482	set val [expr {0.01*$val}]
1483	foreach tag [GetDatasetsWithComponent $_current] {
1484	SendCmd "volume quality $val $tag"
1485	}
1486	}
1487	"axesVisible" {
1488	set bool $_settings(axesVisible)
1489	SendCmd "axis visible all $bool"
1490	}
1491	"axisLabels" {
1492	set bool $_settings(axisLabels)
1493	SendCmd "axis labels all $bool"
1494	}
1495	"axisGridX" - "axisGridY" - "axisGridZ" {
1496	set axis [string tolower [string range $what end end]]
1497	set bool $_settings($what)
1498	SendCmd "axis grid $axis $bool"
1499	}
1500	"axisFlyMode" {
1501	set mode [$itk_component(axismode) value]
1502	set mode [$itk_component(axismode) translate $mode]
1503	set _settings($what) $mode
1504	SendCmd "axis flymode $mode"
1505	}
1506	"cutplaneEdges" {
1507	set bool $_settings($what)
1508	foreach dataset [CurrentDatasets -visible] {
1509	if {$_cutplaneCmd != "imgcutplane"} {
1510	SendCmd "$_cutplaneCmd edges $bool $dataset"
1511	}
1512	}
1513	}
1514	"cutplaneWireframe" {
1515	set bool $_settings($what)
1516	foreach dataset [CurrentDatasets -visible] {
1517	if {$_cutplaneCmd != "imgcutplane"} {
1518	SendCmd "$_cutplaneCmd wireframe $bool $dataset"
1519	}
1520	}
1521	}
1522	"cutplaneVisible" {
1523	set bool $_settings($what)
1524	foreach dataset [CurrentDatasets -visible] {
1525	SendCmd "$_cutplaneCmd visible $bool $dataset"
1526	}
1527	}
1528	"cutplaneLighting" {
1529	set bool $_settings($what)
1530	foreach dataset [CurrentDatasets -visible] {
1531	if {$_cutplaneCmd != "imgcutplane"} {
1532	SendCmd "$_cutplaneCmd lighting $bool $dataset"
1533	} else {
1534	if {$bool} {
1535	set ambient 0.0
1536	set diffuse 1.0
1537	} else {
1538	set ambient 1.0
1539	set diffuse 0.0
1540	}
1541	SendCmd "imgcutplane material $ambient $diffuse $dataset"
1542	}
1543	}
1544	}
1545	"cutplaneOpacity" {
1546	set val $_settings($what)
1547	set sval [expr { 0.01 * double($val) }]
1548	foreach dataset [CurrentDatasets -visible] {
1549	SendCmd "$_cutplaneCmd opacity $sval $dataset"
1550	}
1551	}
1552	"cutplaneVisibleX" - "cutplaneVisibleY" - "cutplaneVisibleZ" {
1553	set axis [string tolower [string range $what end end]]
1554	set bool $_settings($what)
1555	if { $bool } {
1556	$itk_component(${axis}CutScale) configure -state normal \
1557	-troughcolor white
1558	} else {
1559	$itk_component(${axis}CutScale) configure -state disabled \
1560	-troughcolor grey82
1561	}
1562	foreach dataset [CurrentDatasets -visible] {
1563	SendCmd "$_cutplaneCmd axis $axis $bool $dataset"
1564	}
1565	}
1566	"cutplanePositionX" - "cutplanePositionY" - "cutplanePositionZ" {
1567	set axis [string tolower [string range $what end end]]
1568	set pos [expr $_settings($what) * 0.01]
1569	foreach dataset [CurrentDatasets -visible] {
1570	SendCmd "$_cutplaneCmd slice ${axis} ${pos} $dataset"
1571	}
1572	set _cutplanePending 0
1573	}
1574	"volumeThickness" {
1575	set _settings($_current-volumeThickness) $_settings(volumeThickness)
1576	updateTransferFunctions
1577	}
1578	"volumeColormap" {
1579	set color [$itk_component(colormap) value]
1580	set _settings(colormap) $color
1581	set _settings($_current-colormap) $color
1582	ResetColormap $_current $color
1583	}
1584	"field" {
1585	set label [$itk_component(field) value]
1586	set fname [$itk_component(field) translate $label]
1587	set _settings(field) $fname
1588	if { [info exists _fields($fname)] } {
1589	foreach { label units components } $_fields($fname) break
1590	if { $components > 1 } {
1591	puts stderr "Can't use a vector field in a volume"
1592	return
1593	}
1594	set _curFldName $fname
1595	set _curFldLabel $label
1596	} else {
1597	puts stderr "unknown field \"$fname\""
1598	return
1599	}
1600	foreach dataset [CurrentDatasets -visible $_first] {
1601	SendCmd "dataset scalar $_curFldName $dataset"
1602	}
1603	SendCmd "camera reset"
1604	DrawLegend
1605	}
1606	default {
1607	error "don't know how to fix $what"
1608	}
1609	}
1610	}
1611
1612	#
1613	# RequestLegend --
1614	#
1615	# Request a new legend from the server. The size of the legend
1616	# is determined from the height of the canvas.
1617	#
1618	itcl::body Rappture::VtkVolumeViewer::RequestLegend {} {
1619	set _legendPending 0
1620	set font "Arial 8"
1621	set lineht [font metrics $itk_option(-font) -linespace]
1622	set c $itk_component(legend)
1623	set w [winfo width $c]
1624	set h [winfo height $c]
1625	set h [expr {$h-$lineht-20}]
1626	set w [expr {$w-20}]
1627	# Set the legend on the first volume dataset.
1628	foreach dataset [CurrentDatasets -visible $_first] {
1629	foreach {dataobj comp} [split $dataset -] break
1630	if { [info exists _dataset2style($dataset)] } {
1631	SendCmdNoWait \
1632	"legend2 $_dataset2style($dataset) $w $h"
1633	#"legend $_dataset2style($dataset) scalar $_curFldName {} $w $h 0"
1634	break;
1635	}
1636	}
1637	}
1638
1639	# ----------------------------------------------------------------------
1640	# CONFIGURATION OPTION: -plotbackground
1641	# ----------------------------------------------------------------------
1642	itcl::configbody Rappture::VtkVolumeViewer::plotbackground {
1643	if { [isconnected] } {
1644	set color $itk_option(-plotbackground)
1645	set rgb [Color2RGB $color]
1646	SendCmd "screen bgcolor $rgb"
1647	$itk_component(legend) configure -background $color
1648	}
1649	}
1650
1651	# ----------------------------------------------------------------------
1652	# CONFIGURATION OPTION: -plotforeground
1653	# ----------------------------------------------------------------------
1654	itcl::configbody Rappture::VtkVolumeViewer::plotforeground {
1655	if { [isconnected] } {
1656	set color $itk_option(-plotforeground)
1657	set rgb [Color2RGB $color]
1658	SendCmd "axis color all $rgb"
1659	SendCmd "outline color $rgb"
1660	SendCmd "cutplane color $rgb"
1661	$itk_component(legend) itemconfigure labels -fill $color
1662	$itk_component(legend) itemconfigure limits -fill $color
1663	}
1664	}
1665
1666	itcl::body Rappture::VtkVolumeViewer::BuildViewTab {} {
1667	foreach { key value } {
1668	grid 0
1669	axes 1
1670	outline 0
1671	volume 1
1672	legend 1
1673	particles 1
1674	lic 1
1675	} {
1676	set _settings($this-$key) $value
1677	}
1678
1679	set fg [option get $itk_component(hull) font Font]
1680	#set bfg [option get $itk_component(hull) boldFont Font]
1681
1682	set inner [$itk_component(main) insert end \
1683	-title "View Settings" \
1684	-icon [Rappture::icon wrench]]
1685	$inner configure -borderwidth 4
1686
1687	checkbutton $inner.axes \
1688	-text "Axes" \
1689	-variable [itcl::scope _settings(axesVisible)] \
1690	-command [itcl::code $this AdjustSetting axesVisible] \
1691	-font "Arial 9"
1692
1693	checkbutton $inner.outline \
1694	-text "Outline" \
1695	-variable [itcl::scope _settings(outline)] \
1696	-command [itcl::code $this AdjustSetting outline] \
1697	-font "Arial 9"
1698
1699	checkbutton $inner.legend \
1700	-text "Legend" \
1701	-variable [itcl::scope _settings(legendVisible)] \
1702	-command [itcl::code $this AdjustSetting legendVisible] \
1703	-font "Arial 9"
1704
1705	checkbutton $inner.volume \
1706	-text "Volume" \
1707	-variable [itcl::scope _settings(volumeVisible)] \
1708	-command [itcl::code $this AdjustSetting volumeVisible] \
1709	-font "Arial 9"
1710
1711	label $inner.background_l -text "Background" -font "Arial 9"
1712	itk_component add background {
1713	Rappture::Combobox $inner.background -width 10 -editable no
1714	}
1715	$inner.background choices insert end \
1716	"black" "black" \
1717	"white" "white" \
1718	"grey" "grey"
1719
1720	$itk_component(background) value $_settings(background)
1721	bind $inner.background <<Value>> [itcl::code $this AdjustSetting background]
1722
1723	blt::table $inner \
1724	0,0 $inner.axes -cspan 2 -anchor w \
1725	1,0 $inner.outline -cspan 2 -anchor w \
1726	2,0 $inner.volume -cspan 2 -anchor w \
1727	3,0 $inner.legend -cspan 2 -anchor w \
1728	4,0 $inner.background_l -anchor e -pady 2 \
1729	4,1 $inner.background -fill x \
1730
1731	blt::table configure $inner r* -resize none
1732	blt::table configure $inner r5 -resize expand
1733	}
1734
1735	itcl::body Rappture::VtkVolumeViewer::BuildVolumeTab {} {
1736	set font [option get $itk_component(hull) font Font]
1737	#set bfont [option get $itk_component(hull) boldFont Font]
1738
1739	set inner [$itk_component(main) insert end \
1740	-title "Volume Settings" \
1741	-icon [Rappture::icon volume-on]]
1742	$inner configure -borderwidth 4
1743
1744	label $inner.volcomponents_l -text "Component" -font $font
1745	itk_component add volcomponents {
1746	Rappture::Combobox $inner.volcomponents -editable no
1747	}
1748	$itk_component(volcomponents) value "BCGYR"
1749	bind $inner.volcomponents <<Value>> \
1750	[itcl::code $this AdjustSetting current]
1751
1752	checkbutton $inner.visibility \
1753	-text "Visible" \
1754	-font $font \
1755	-variable [itcl::scope _settings(volumeVisible)] \
1756	-command [itcl::code $this AdjustSetting volumeVisible]
1757
1758	label $inner.lighting_l \
1759	-text "Lighting / Material Properties" \
1760	-font "Arial 9 bold"
1761
1762	checkbutton $inner.lighting \
1763	-text "Enable Lighting" \
1764	-font $font \
1765	-variable [itcl::scope _settings(volumeLighting)] \
1766	-command [itcl::code $this AdjustSetting volumeLighting]
1767
1768	label $inner.ambient_l \
1769	-text "Ambient" \
1770	-font $font
1771	::scale $inner.ambient -from 0 -to 100 -orient horizontal \
1772	-variable [itcl::scope _settings(volumeAmbient)] \
1773	-showvalue off -command [itcl::code $this AdjustSetting volumeAmbient] \
1774	-troughcolor grey92
1775
1776	label $inner.diffuse_l -text "Diffuse" -font $font
1777	::scale $inner.diffuse -from 0 -to 100 -orient horizontal \
1778	-variable [itcl::scope _settings(volumeDiffuse)] \
1779	-showvalue off -command [itcl::code $this AdjustSetting volumeDiffuse] \
1780	-troughcolor grey92
1781
1782	label $inner.specularLevel_l -text "Specular" -font $font
1783	::scale $inner.specularLevel -from 0 -to 100 -orient horizontal \
1784	-variable [itcl::scope _settings(volumeSpecularLevel)] \
1785	-showvalue off -command [itcl::code $this AdjustSetting volumeSpecularLevel] \
1786	-troughcolor grey92
1787
1788	label $inner.specularExponent_l -text "Shininess" -font $font
1789	::scale $inner.specularExponent -from 10 -to 128 -orient horizontal \
1790	-variable [itcl::scope _settings(volumeSpecularExponent)] \
1791	-showvalue off -command [itcl::code $this AdjustSetting volumeSpecularExponent] \
1792	-troughcolor grey92
1793
1794	label $inner.opacity_l -text "Opacity" -font $font
1795	::scale $inner.opacity -from 0 -to 100 -orient horizontal \
1796	-variable [itcl::scope _settings(volumeOpacity)] \
1797	-showvalue off -command [itcl::code $this AdjustSetting volumeOpacity] \
1798	-troughcolor grey92
1799
1800	label $inner.quality_l -text "Quality" -font $font
1801	::scale $inner.quality -from 0 -to 100 -orient horizontal \
1802	-variable [itcl::scope _settings(volumeQuality)] \
1803	-showvalue off -command [itcl::code $this AdjustSetting volumeQuality] \
1804	-troughcolor grey92
1805
1806	label $inner.field_l -text "Field" -font $font
1807	itk_component add field {
1808	Rappture::Combobox $inner.field -editable no
1809	}
1810	bind $inner.field <<Value>> \
1811	[itcl::code $this AdjustSetting field]
1812
1813	label $inner.transferfunction_l \
1814	-text "Transfer Function" -font "Arial 9 bold"
1815
1816	label $inner.thin -text "Thin" -font $font
1817	::scale $inner.thickness -from 0 -to 1000 -orient horizontal \
1818	-variable [itcl::scope _settings(volumeThickness)] \
1819	-showvalue off -command [itcl::code $this AdjustSetting volumeThickness] \
1820	-troughcolor grey92
1821
1822	label $inner.thick -text "Thick" -font $font
1823	$inner.thickness set $_settings(volumeThickness)
1824
1825	label $inner.colormap_l -text "Colormap" -font $font
1826	itk_component add colormap {
1827	Rappture::Combobox $inner.colormap -width 10 -editable no
1828	}
1829	$inner.colormap choices insert end \
1830	"BCGYR" "BCGYR" \
1831	"BGYOR" "BGYOR" \
1832	"blue" "blue" \
1833	"blue-to-brown" "blue-to-brown" \
1834	"blue-to-orange" "blue-to-orange" \
1835	"blue-to-grey" "blue-to-grey" \
1836	"green-to-magenta" "green-to-magenta" \
1837	"greyscale" "greyscale" \
1838	"nanohub" "nanohub" \
1839	"rainbow" "rainbow" \
1840	"spectral" "spectral" \
1841	"ROYGB" "ROYGB" \
1842	"RYGCB" "RYGCB" \
1843	"brown-to-blue" "brown-to-blue" \
1844	"grey-to-blue" "grey-to-blue" \
1845	"orange-to-blue" "orange-to-blue"
1846
1847	$itk_component(colormap) value "BCGYR"
1848	bind $inner.colormap <<Value>> \
1849	[itcl::code $this AdjustSetting volumeColormap]
1850
1851	label $inner.blendmode_l -text "Blend Mode" -font $font
1852	itk_component add blendmode {
1853	Rappture::Combobox $inner.blendmode -editable no
1854	}
1855	$inner.blendmode choices insert end \
1856	"composite" "Composite" \
1857	"max_intensity" "Maximum Intensity" \
1858	"additive" "Additive"
1859
1860	$itk_component(blendmode) value "[$itk_component(blendmode) label $_settings(volumeBlendMode)]"
1861	bind $inner.blendmode <<Value>> \
1862	[itcl::code $this AdjustSetting volumeBlendMode]
1863
1864	blt::table $inner \
1865	0,0 $inner.volcomponents_l -anchor e -cspan 2 \
1866	0,2 $inner.volcomponents -cspan 3 -fill x \
1867	1,0 $inner.field_l -anchor e -cspan 2 \
1868	1,2 $inner.field -cspan 3 -fill x \
1869	2,0 $inner.lighting_l -anchor w -cspan 4 \
1870	3,1 $inner.lighting -anchor w -cspan 3 \
1871	4,1 $inner.ambient_l -anchor e -pady 2 \
1872	4,2 $inner.ambient -cspan 3 -fill x \
1873	5,1 $inner.diffuse_l -anchor e -pady 2 \
1874	5,2 $inner.diffuse -cspan 3 -fill x \
1875	6,1 $inner.specularLevel_l -anchor e -pady 2 \
1876	6,2 $inner.specularLevel -cspan 3 -fill x \
1877	7,1 $inner.specularExponent_l -anchor e -pady 2 \
1878	7,2 $inner.specularExponent -cspan 3 -fill x \
1879	8,1 $inner.visibility -anchor w -cspan 3 \
1880	9,1 $inner.quality_l -anchor e -pady 2 \
1881	9,2 $inner.quality -cspan 3 -fill x \
1882	10,0 $inner.transferfunction_l -anchor w -cspan 4 \
1883	11,1 $inner.opacity_l -anchor e -pady 2 \
1884	11,2 $inner.opacity -cspan 3 -fill x \
1885	12,1 $inner.colormap_l -anchor e \
1886	12,2 $inner.colormap -padx 2 -cspan 3 -fill x \
1887	13,1 $inner.blendmode_l -anchor e \
1888	13,2 $inner.blendmode -padx 2 -cspan 3 -fill x \
1889	14,1 $inner.thin -anchor e \
1890	14,2 $inner.thickness -cspan 2 -fill x \
1891	14,4 $inner.thick -anchor w
1892
1893	blt::table configure $inner r* c* -resize none
1894	blt::table configure $inner r* -pady { 2 0 }
1895	blt::table configure $inner c2 c3 r15 -resize expand
1896	blt::table configure $inner c0 -width .1i
1897	}
1898
1899	itcl::body Rappture::VtkVolumeViewer::BuildAxisTab {} {
1900
1901	set fg [option get $itk_component(hull) font Font]
1902	#set bfg [option get $itk_component(hull) boldFont Font]
1903
1904	set inner [$itk_component(main) insert end \
1905	-title "Axis Settings" \
1906	-icon [Rappture::icon axis1]]
1907	$inner configure -borderwidth 4
1908
1909	checkbutton $inner.visible \
1910	-text "Show Axes" \
1911	-variable [itcl::scope _settings(axesVisible)] \
1912	-command [itcl::code $this AdjustSetting axesVisible] \
1913	-font "Arial 9"
1914
1915	checkbutton $inner.labels \
1916	-text "Show Axis Labels" \
1917	-variable [itcl::scope _settings(axisLabels)] \
1918	-command [itcl::code $this AdjustSetting axisLabels] \
1919	-font "Arial 9"
1920
1921	checkbutton $inner.gridx \
1922	-text "Show X Grid" \
1923	-variable [itcl::scope _settings(axisGridX)] \
1924	-command [itcl::code $this AdjustSetting axisGridX] \
1925	-font "Arial 9"
1926	checkbutton $inner.gridy \
1927	-text "Show Y Grid" \
1928	-variable [itcl::scope _settings(axisGridY)] \
1929	-command [itcl::code $this AdjustSetting axisGridY] \
1930	-font "Arial 9"
1931	checkbutton $inner.gridz \
1932	-text "Show Z Grid" \
1933	-variable [itcl::scope _settings(axisGridZ)] \
1934	-command [itcl::code $this AdjustSetting axisGridZ] \
1935	-font "Arial 9"
1936
1937	label $inner.mode_l -text "Mode" -font "Arial 9"
1938
1939	itk_component add axismode {
1940	Rappture::Combobox $inner.mode -width 10 -editable no
1941	}
1942	$inner.mode choices insert end \
1943	"static_triad" "static" \
1944	"closest_triad" "closest" \
1945	"furthest_triad" "farthest" \
1946	"outer_edges" "outer"
1947	$itk_component(axismode) value "static"
1948	bind $inner.mode <<Value>> [itcl::code $this AdjustSetting axisFlyMode]
1949
1950	blt::table $inner \
1951	0,0 $inner.visible -anchor w -cspan 2 \
1952	1,0 $inner.labels -anchor w -cspan 2 \
1953	2,0 $inner.gridx -anchor w -cspan 2 \
1954	3,0 $inner.gridy -anchor w -cspan 2 \
1955	4,0 $inner.gridz -anchor w -cspan 2 \
1956	5,0 $inner.mode_l -anchor w -cspan 2 -padx { 2 0 } \
1957	6,0 $inner.mode -fill x -cspan 2
1958
1959	blt::table configure $inner r* c* -resize none
1960	blt::table configure $inner r7 c1 -resize expand
1961	}
1962
1963
1964	itcl::body Rappture::VtkVolumeViewer::BuildCameraTab {} {
1965	set inner [$itk_component(main) insert end \
1966	-title "Camera Settings" \
1967	-icon [Rappture::icon camera]]
1968	$inner configure -borderwidth 4
1969
1970	label $inner.view_l -text "view" -font "Arial 9"
1971	set f [frame $inner.view]
1972	foreach side { front back left right top bottom } {
1973	button $f.$side -image [Rappture::icon view$side] \
1974	-command [itcl::code $this SetOrientation $side]
1975	Rappture::Tooltip::for $f.$side "Change the view to $side"
1976	pack $f.$side -side left
1977	}
1978	blt::table $inner \
1979	0,0 $inner.view_l -anchor e -pady 2 \
1980	0,1 $inner.view -anchor w -pady 2
1981
1982	set row 1
1983
1984	set labels { qx qy qz qw xpan ypan zoom }
1985	foreach tag $labels {
1986	label $inner.${tag}label -text $tag -font "Arial 9"
1987	entry $inner.${tag} -font "Arial 9" -bg white \
1988	-textvariable [itcl::scope _view($tag)]
1989	bind $inner.${tag} <KeyPress-Return> \
1990	[itcl::code $this camera set ${tag}]
1991	blt::table $inner \
1992	$row,0 $inner.${tag}label -anchor e -pady 2 \
1993	$row,1 $inner.${tag} -anchor w -pady 2
1994	blt::table configure $inner r$row -resize none
1995	incr row
1996	}
1997	checkbutton $inner.ortho \
1998	-text "Orthographic Projection" \
1999	-variable [itcl::scope _view(ortho)] \
2000	-command [itcl::code $this camera set ortho] \
2001	-font "Arial 9"
2002	blt::table $inner \
2003	$row,0 $inner.ortho -cspan 2 -anchor w -pady 2
2004	blt::table configure $inner r$row -resize none
2005	incr row
2006
2007	blt::table configure $inner r* c0 c1 -resize none
2008	blt::table configure $inner c2 -resize expand
2009	blt::table configure $inner r$row -resize expand
2010	}
2011
2012	itcl::body Rappture::VtkVolumeViewer::BuildCutplaneTab {} {
2013
2014	set fg [option get $itk_component(hull) font Font]
2015
2016	set inner [$itk_component(main) insert end \
2017	-title "Cutplane Settings" \
2018	-icon [Rappture::icon cutbutton]]
2019
2020	$inner configure -borderwidth 4
2021
2022	checkbutton $inner.visible \
2023	-text "Show Cutplanes" \
2024	-variable [itcl::scope _settings(cutplaneVisible)] \
2025	-command [itcl::code $this AdjustSetting cutplaneVisible] \
2026	-font "Arial 9"
2027
2028	checkbutton $inner.wireframe \
2029	-text "Show Wireframe" \
2030	-variable [itcl::scope _settings(cutplaneWireframe)] \
2031	-command [itcl::code $this AdjustSetting cutplaneWireframe] \
2032	-font "Arial 9"
2033
2034	checkbutton $inner.lighting \
2035	-text "Enable Lighting" \
2036	-variable [itcl::scope _settings(cutplaneLighting)] \
2037	-command [itcl::code $this AdjustSetting cutplaneLighting] \
2038	-font "Arial 9"
2039
2040	checkbutton $inner.edges \
2041	-text "Show Edges" \
2042	-variable [itcl::scope _settings(cutplaneEdges)] \
2043	-command [itcl::code $this AdjustSetting cutplaneEdges] \
2044	-font "Arial 9"
2045
2046	label $inner.opacity_l -text "Opacity" -font "Arial 9"
2047	::scale $inner.opacity -from 0 -to 100 -orient horizontal \
2048	-variable [itcl::scope _settings(cutplaneOpacity)] \
2049	-width 10 \
2050	-showvalue off \
2051	-command [itcl::code $this AdjustSetting cutplaneOpacity]
2052	$inner.opacity set $_settings(cutplaneOpacity)
2053
2054	# X-value slicer...
2055	itk_component add xCutButton {
2056	Rappture::PushButton $inner.xbutton \
2057	-onimage [Rappture::icon x-cutplane] \
2058	-offimage [Rappture::icon x-cutplane] \
2059	-command [itcl::code $this AdjustSetting cutplaneVisibleX] \
2060	-variable [itcl::scope _settings(cutplaneVisibleX)]
2061	}
2062	Rappture::Tooltip::for $itk_component(xCutButton) \
2063	"Toggle the X-axis cutplane on/off"
2064	$itk_component(xCutButton) select
2065
2066	itk_component add xCutScale {
2067	::scale $inner.xval -from 100 -to 0 \
2068	-width 10 -orient vertical -showvalue yes \
2069	-borderwidth 1 -highlightthickness 0 \
2070	-command [itcl::code $this EventuallySetCutplane x] \
2071	-variable [itcl::scope _settings(cutplanePositionX)]
2072	} {
2073	usual
2074	ignore -borderwidth -highlightthickness
2075	}
2076	# Set the default cutplane value before disabling the scale.
2077	$itk_component(xCutScale) set 50
2078	$itk_component(xCutScale) configure -state disabled
2079	Rappture::Tooltip::for $itk_component(xCutScale) \
2080	"@[itcl::code $this Slice tooltip x]"
2081
2082	# Y-value slicer...
2083	itk_component add yCutButton {
2084	Rappture::PushButton $inner.ybutton \
2085	-onimage [Rappture::icon y-cutplane] \
2086	-offimage [Rappture::icon y-cutplane] \
2087	-command [itcl::code $this AdjustSetting cutplaneVisibleY] \
2088	-variable [itcl::scope _settings(cutplaneVisibleY)]
2089	}
2090	Rappture::Tooltip::for $itk_component(yCutButton) \
2091	"Toggle the Y-axis cutplane on/off"
2092	$itk_component(yCutButton) select
2093
2094	itk_component add yCutScale {
2095	::scale $inner.yval -from 100 -to 0 \
2096	-width 10 -orient vertical -showvalue yes \
2097	-borderwidth 1 -highlightthickness 0 \
2098	-command [itcl::code $this EventuallySetCutplane y] \
2099	-variable [itcl::scope _settings(cutplanePositionY)]
2100	} {
2101	usual
2102	ignore -borderwidth -highlightthickness
2103	}
2104	Rappture::Tooltip::for $itk_component(yCutScale) \
2105	"@[itcl::code $this Slice tooltip y]"
2106	# Set the default cutplane value before disabling the scale.
2107	$itk_component(yCutScale) set 50
2108	$itk_component(yCutScale) configure -state disabled
2109
2110	# Z-value slicer...
2111	itk_component add zCutButton {
2112	Rappture::PushButton $inner.zbutton \
2113	-onimage [Rappture::icon z-cutplane] \
2114	-offimage [Rappture::icon z-cutplane] \
2115	-command [itcl::code $this AdjustSetting cutplaneVisibleZ] \
2116	-variable [itcl::scope _settings(cutplaneVisibleZ)]
2117	}
2118	Rappture::Tooltip::for $itk_component(zCutButton) \
2119	"Toggle the Z-axis cutplane on/off"
2120	$itk_component(zCutButton) select
2121
2122	itk_component add zCutScale {
2123	::scale $inner.zval -from 100 -to 0 \
2124	-width 10 -orient vertical -showvalue yes \
2125	-borderwidth 1 -highlightthickness 0 \
2126	-command [itcl::code $this EventuallySetCutplane z] \
2127	-variable [itcl::scope _settings(cutplanePositionZ)]
2128	} {
2129	usual
2130	ignore -borderwidth -highlightthickness
2131	}
2132	$itk_component(zCutScale) set 50
2133	$itk_component(zCutScale) configure -state disabled
2134	Rappture::Tooltip::for $itk_component(zCutScale) \
2135	"@[itcl::code $this Slice tooltip z]"
2136
2137	blt::table $inner \
2138	0,0 $inner.visible -anchor w -pady 2 -cspan 4 \
2139	1,0 $inner.lighting -anchor w -pady 2 -cspan 4 \
2140	2,0 $inner.wireframe -anchor w -pady 2 -cspan 4 \
2141	3,0 $inner.edges -anchor w -pady 2 -cspan 4 \
2142	4,0 $inner.opacity_l -anchor w -pady 2 -cspan 3 \
2143	5,0 $inner.opacity -fill x -pady 2 -cspan 3 \
2144	6,0 $itk_component(xCutButton) -anchor e -padx 2 -pady 2 \
2145	7,0 $itk_component(xCutScale) -fill y \
2146	6,1 $itk_component(yCutButton) -anchor e -padx 2 -pady 2 \
2147	7,1 $itk_component(yCutScale) -fill y \
2148	6,2 $itk_component(zCutButton) -anchor e -padx 2 -pady 2 \
2149	7,2 $itk_component(zCutScale) -fill y \
2150
2151	blt::table configure $inner r* c* -resize none
2152	blt::table configure $inner r7 c3 -resize expand
2153	}
2154
2155	#
2156	# camera --
2157	#
2158	itcl::body Rappture::VtkVolumeViewer::camera {option args} {
2159	switch -- $option {
2160	"show" {
2161	puts [array get _view]
2162	}
2163	"set" {
2164	set who [lindex $args 0]
2165	set x $_view($who)
2166	set code [catch { string is double $x } result]
2167	if { $code != 0 \|\| !$result } {
2168	return
2169	}
2170	switch -- $who {
2171	"ortho" {
2172	if {$_view(ortho)} {
2173	SendCmd "camera mode ortho"
2174	} else {
2175	SendCmd "camera mode persp"
2176	}
2177	}
2178	"xpan" - "ypan" {
2179	PanCamera
2180	}
2181	"qx" - "qy" - "qz" - "qw" {
2182	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
2183	$_arcball quaternion $q
2184	EventuallyRotate $q
2185	}
2186	"zoom" {
2187	SendCmd "camera zoom $_view(zoom)"
2188	}
2189	}
2190	}
2191	}
2192	}
2193
2194	itcl::body Rappture::VtkVolumeViewer::GetVtkData { args } {
2195	set bytes ""
2196	foreach dataobj [get] {
2197	foreach comp [$dataobj components] {
2198	set tag $dataobj-$comp
2199	set contents [$dataobj vtkdata $comp]
2200	append bytes "$contents\n"
2201	}
2202	}
2203	return [list .vtk $bytes]
2204	}
2205
2206	itcl::body Rappture::VtkVolumeViewer::GetImage { args } {
2207	if { [image width $_image(download)] > 0 &&
2208	[image height $_image(download)] > 0 } {
2209	set bytes [$_image(download) data -format "jpeg -quality 100"]
2210	set bytes [Rappture::encoding::decode -as b64 $bytes]
2211	return [list .jpg $bytes]
2212	}
2213	return ""
2214	}
2215
2216	itcl::body Rappture::VtkVolumeViewer::BuildDownloadPopup { popup command } {
2217	Rappture::Balloon $popup \
2218	-title "[Rappture::filexfer::label downloadWord] as..."
2219	set inner [$popup component inner]
2220	label $inner.summary -text "" -anchor w
2221	radiobutton $inner.vtk_button -text "VTK data file" \
2222	-variable [itcl::scope _downloadPopup(format)] \
2223	-font "Helvetica 9 " \
2224	-value vtk
2225	Rappture::Tooltip::for $inner.vtk_button "Save as VTK data file."
2226	radiobutton $inner.image_button -text "Image File" \
2227	-variable [itcl::scope _downloadPopup(format)] \
2228	-value image
2229	Rappture::Tooltip::for $inner.image_button \
2230	"Save as digital image."
2231
2232	button $inner.ok -text "Save" \
2233	-highlightthickness 0 -pady 2 -padx 3 \
2234	-command $command \
2235	-compound left \
2236	-image [Rappture::icon download]
2237
2238	button $inner.cancel -text "Cancel" \
2239	-highlightthickness 0 -pady 2 -padx 3 \
2240	-command [list $popup deactivate] \
2241	-compound left \
2242	-image [Rappture::icon cancel]
2243
2244	blt::table $inner \
2245	0,0 $inner.summary -cspan 2 \
2246	1,0 $inner.vtk_button -anchor w -cspan 2 -padx { 4 0 } \
2247	2,0 $inner.image_button -anchor w -cspan 2 -padx { 4 0 } \
2248	4,1 $inner.cancel -width .9i -fill y \
2249	4,0 $inner.ok -padx 2 -width .9i -fill y
2250	blt::table configure $inner r3 -height 4
2251	blt::table configure $inner r4 -pady 4
2252	raise $inner.image_button
2253	$inner.vtk_button invoke
2254	return $inner
2255	}
2256
2257	itcl::body Rappture::VtkVolumeViewer::SetObjectStyle { dataobj cname } {
2258	# Parse style string.
2259	set tag $dataobj-$cname
2260	set style [$dataobj style $cname]
2261	array set settings {
2262	-color \#808080
2263	-edges 0
2264	-edgecolor black
2265	-linewidth 1.0
2266	-opacity 0.4
2267	-wireframe 0
2268	-lighting 1
2269	-visible 1
2270	}
2271	if { $dataobj != $_first } {
2272	set settings(-opacity) 1
2273	}
2274	array set settings $style
2275	SendCmd "volume add $tag"
2276	SendCmd "$_cutplaneCmd add $tag"
2277	SendCmd "$_cutplaneCmd visible 0 $tag"
2278	SendCmd "volume lighting $settings(-lighting) $tag"
2279	set _settings(volumeLighting) $settings(-lighting)
2280	SetInitialTransferFunction $dataobj $cname
2281	SendCmd "volume colormap $cname $tag"
2282	SendCmd "$_cutplaneCmd colormap $cname-opaque $tag"
2283	SendCmd "outline add $tag"
2284	SendCmd "outline visible 0 $tag"
2285	}
2286
2287	itcl::body Rappture::VtkVolumeViewer::IsValidObject { dataobj } {
2288	if {[catch {$dataobj isa Rappture::Field} valid] != 0 \|\| !$valid} {
2289	return 0
2290	}
2291	return 1
2292	}
2293
2294	# ----------------------------------------------------------------------
2295	# USAGE: ReceiveLegend <colormap> <title> <vmin> <vmax> <size>
2296	#
2297	# Invoked automatically whenever the "legend" command comes in from
2298	# the rendering server. Indicates that binary image data with the
2299	# specified <size> will follow.
2300	# ----------------------------------------------------------------------
2301	itcl::body Rappture::VtkVolumeViewer::ReceiveLegend { colormap title vmin vmax size } {
2302	if { [isconnected] } {
2303	set bytes [ReceiveBytes $size]
2304	if { ![info exists _image(legend)] } {
2305	set _image(legend) [image create photo]
2306	}
2307	$_image(legend) configure -data $bytes
2308	#puts stderr "read $size bytes for [image width $_image(legend)]x[image height $_image(legend)] legend>"
2309	if { [catch {DrawLegend} errs] != 0 } {
2310	puts stderr errs=$errs
2311	}
2312	}
2313	}
2314
2315	#
2316	# DrawLegend --
2317	#
2318	itcl::body Rappture::VtkVolumeViewer::DrawLegend {} {
2319	if { $_current == "" } {
2320	set _current "component"
2321	}
2322	set cname $_current
2323	set c $itk_component(legend)
2324	set w [winfo width $c]
2325	set h [winfo height $c]
2326	set lx 10
2327	set ly [expr {$h - 1}]
2328	if {"" == [$c find withtag colorbar]} {
2329	$c create image 10 10 -anchor nw \
2330	-image $_image(legend) -tags colorbar
2331	$c create text $lx $ly -anchor sw \
2332	-fill $itk_option(-plotforeground) -tags "limits text vmin"
2333	$c create text [expr {$w-$lx}] $ly -anchor se \
2334	-fill $itk_option(-plotforeground) -tags "limits text vmax"
2335	$c create text [expr {$w/2}] $ly -anchor s \
2336	-fill $itk_option(-plotforeground) -tags "limits text title"
2337	$c lower colorbar
2338	$c bind colorbar <ButtonRelease-1> [itcl::code $this AddNewMarker %x %y]
2339	}
2340
2341	# Display the markers used by the current transfer function.
2342	HideAllMarkers
2343	if { [info exists _transferFunctionEditors($cname)] } {
2344	$_transferFunctionEditors($cname) showMarkers $_limits($cname)
2345	}
2346
2347	foreach {min max} $_limits($cname) break
2348	$c itemconfigure vmin -text [format %.2g $min]
2349	$c coords vmin $lx $ly
2350
2351	$c itemconfigure vmax -text [format %.2g $max]
2352	$c coords vmax [expr {$w-$lx}] $ly
2353
2354	set title ""
2355	if { $_first != "" } {
2356	set title [$_first hints label]
2357	set units [$_first hints units]
2358	if { $units != "" } {
2359	set title "$title ($units)"
2360	}
2361	}
2362	$c itemconfigure title -text $title
2363	$c coords title [expr {$w/2}] $ly
2364	}
2365
2366	#
2367	# DrawLegendOld --
2368	#
2369	# Draws the legend in it's own canvas which resides to the right
2370	# of the contour plot area.
2371	#
2372	itcl::body Rappture::VtkVolumeViewer::DrawLegendOld { } {
2373	set fname $_curFldName
2374	set c $itk_component(view)
2375	set w [winfo width $c]
2376	set h [winfo height $c]
2377	set font "Arial 8"
2378	set lineht [font metrics $font -linespace]
2379
2380	if { [info exists _fields($fname)] } {
2381	foreach { title units } $_fields($fname) break
2382	if { $units != "" } {
2383	set title [format "%s (%s)" $title $units]
2384	}
2385	} else {
2386	set title $fname
2387	}
2388	if { $_settings(legendVisible) } {
2389	set x [expr $w - 2]
2390	if { [$c find withtag "legend"] == "" } {
2391	set y 2
2392	$c create text $x $y \
2393	-anchor ne \
2394	-fill $itk_option(-plotforeground) -tags "title legend" \
2395	-font $font
2396	incr y $lineht
2397	$c create text $x $y \
2398	-anchor ne \
2399	-fill $itk_option(-plotforeground) -tags "vmax legend" \
2400	-font $font
2401	incr y $lineht
2402	$c create image $x $y \
2403	-anchor ne \
2404	-image $_image(legend) -tags "colormap legend"
2405	$c create text $x [expr {$h-2}] \
2406	-anchor se \
2407	-fill $itk_option(-plotforeground) -tags "vmin legend" \
2408	-font $font
2409	#$c bind colormap <Enter> [itcl::code $this EnterLegend %x %y]
2410	$c bind colormap <Leave> [itcl::code $this LeaveLegend]
2411	$c bind colormap <Motion> [itcl::code $this MotionLegend %x %y]
2412	}
2413	$c bind title <ButtonPress> [itcl::code $this Combo post]
2414	$c bind title <Enter> [itcl::code $this Combo activate]
2415	$c bind title <Leave> [itcl::code $this Combo deactivate]
2416	# Reset the item coordinates according the current size of the plot.
2417	$c itemconfigure title -text $title
2418	if { [info exists _limits($_curFldName)] } {
2419	foreach { vmin vmax } $_limits($_curFldName) break
2420	$c itemconfigure vmin -text [format %g $vmin]
2421	$c itemconfigure vmax -text [format %g $vmax]
2422	}
2423	set y 2
2424	$c coords title $x $y
2425	incr y $lineht
2426	$c coords vmax $x $y
2427	incr y $lineht
2428	$c coords colormap $x $y
2429	$c coords vmin $x [expr {$h - 2}]
2430	}
2431	}
2432
2433	#
2434	# EnterLegend --
2435	#
2436	itcl::body Rappture::VtkVolumeViewer::EnterLegend { x y } {
2437	SetLegendTip $x $y
2438	}
2439
2440	#
2441	# MotionLegend --
2442	#
2443	itcl::body Rappture::VtkVolumeViewer::MotionLegend { x y } {
2444	Rappture::Tooltip::tooltip cancel
2445	set c $itk_component(view)
2446	SetLegendTip $x $y
2447	}
2448
2449	#
2450	# LeaveLegend --
2451	#
2452	itcl::body Rappture::VtkVolumeViewer::LeaveLegend { } {
2453	Rappture::Tooltip::tooltip cancel
2454	.rappturetooltip configure -icon ""
2455	}
2456
2457	#
2458	# SetLegendTip --
2459	#
2460	itcl::body Rappture::VtkVolumeViewer::SetLegendTip { x y } {
2461	set c $itk_component(view)
2462	set w [winfo width $c]
2463	set h [winfo height $c]
2464	set font "Arial 8"
2465	set lineht [font metrics $font -linespace]
2466
2467	set imgHeight [image height $_image(legend)]
2468	set coords [$c coords colormap]
2469	set imgX [expr $w - [image width $_image(legend)] - 2]
2470	set imgY [expr $y - 2 * ($lineht + 2)]
2471
2472	if { [info exists _fields($_title)] } {
2473	foreach { title units } $_fields($_title) break
2474	if { $units != "" } {
2475	set title [format "%s (%s)" $title $units]
2476	}
2477	} else {
2478	set title $_title
2479	}
2480	# Make a swatch of the selected color
2481	if { [catch { $_image(legend) get 10 $imgY } pixel] != 0 } {
2482	#puts stderr "out of range: $imgY"
2483	return
2484	}
2485	if { ![info exists _image(swatch)] } {
2486	set _image(swatch) [image create photo -width 24 -height 24]
2487	}
2488	set color [eval format "\#%02x%02x%02x" $pixel]
2489	$_image(swatch) put black -to 0 0 23 23
2490	$_image(swatch) put $color -to 1 1 22 22
2491	.rappturetooltip configure -icon $_image(swatch)
2492
2493	# Compute the value of the point
2494	if { [info exists _limits($_curFldName)] } {
2495	foreach { vmin vmax } $_limits($_curFldName) break
2496	set t [expr 1.0 - (double($imgY) / double($imgHeight-1))]
2497	set value [expr $t * ($vmax - $vmin) + $vmin]
2498	} else {
2499	set value 0.0
2500	}
2501	set tipx [expr $x + 15]
2502	set tipy [expr $y - 5]
2503	Rappture::Tooltip::text $c "$title $value"
2504	Rappture::Tooltip::tooltip show $c +$tipx,+$tipy
2505	}
2506
2507
2508	# ----------------------------------------------------------------------
2509	# USAGE: Slice move x\|y\|z <newval>
2510	#
2511	# Called automatically when the user drags the slider to move the
2512	# cut plane that slices 3D data. Gets the current value from the
2513	# slider and moves the cut plane to the appropriate point in the
2514	# data set.
2515	# ----------------------------------------------------------------------
2516	itcl::body Rappture::VtkVolumeViewer::Slice {option args} {
2517	switch -- $option {
2518	"move" {
2519	set axis [lindex $args 0]
2520	set newval [lindex $args 1]
2521	if {[llength $args] != 2} {
2522	error "wrong # args: should be \"Slice move x\|y\|z newval\""
2523	}
2524	set newpos [expr {0.01*$newval}]
2525	SendCmd "cutplane slice $axis $newpos"
2526	}
2527	"tooltip" {
2528	set axis [lindex $args 0]
2529	set val [$itk_component(${axis}CutScale) get]
2530	return "Move the [string toupper $axis] cut plane.\nCurrently: $axis = $val%"
2531	}
2532	default {
2533	error "bad option \"$option\": should be axis, move, or tooltip"
2534	}
2535	}
2536	}
2537
2538
2539	# ----------------------------------------------------------------------
2540	# USAGE: _dropdown post
2541	# USAGE: _dropdown unpost
2542	# USAGE: _dropdown select
2543	#
2544	# Used internally to handle the dropdown list for this combobox. The
2545	# post/unpost options are invoked when the list is posted or unposted
2546	# to manage the relief of the controlling button. The select option
2547	# is invoked whenever there is a selection from the list, to assign
2548	# the value back to the gauge.
2549	# ----------------------------------------------------------------------
2550	itcl::body Rappture::VtkVolumeViewer::Combo {option} {
2551	set c $itk_component(view)
2552	switch -- $option {
2553	post {
2554	foreach { x1 y1 x2 y2 } [$c bbox title] break
2555	set x1 [expr [winfo width $itk_component(view)] - [winfo reqwidth $itk_component(fieldmenu)]]
2556	set x [expr $x1 + [winfo rootx $itk_component(view)]]
2557	set y [expr $y2 + [winfo rooty $itk_component(view)]]
2558	tk_popup $itk_component(fieldmenu) $x $y
2559	}
2560	activate {
2561	$c itemconfigure title -fill red
2562	}
2563	deactivate {
2564	$c itemconfigure title -fill white
2565	}
2566	invoke {
2567	$itk_component(field) value _curFldLabel
2568	AdjustSetting field
2569	}
2570	default {
2571	error "bad option \"$option\": should be post, unpost, select"
2572	}
2573	}
2574	}
2575
2576	#
2577	# The -levels option takes a single value that represents the number
2578	# of evenly distributed markers based on the current data range. Each
2579	# marker is a relative value from 0.0 to 1.0.
2580	#
2581	itcl::body Rappture::VtkVolumeViewer::ParseLevelsOption { cname levels } {
2582	set c $itk_component(legend)
2583	set list {}
2584	regsub -all "," $levels " " levels
2585	if {[string is int $levels]} {
2586	for {set i 1} { $i <= $levels } {incr i} {
2587	lappend list [expr {double($i)/($levels+1)}]
2588	}
2589	} else {
2590	foreach x $levels {
2591	lappend list $x
2592	}
2593	}
2594	set _parsedFunction($cname) 1
2595	$_transferFunctionEditors($cname) addMarkers $list
2596	}
2597
2598	#
2599	# The -markers option takes a list of zero or more values (the values
2600	# may be separated either by spaces or commas) that have the following
2601	# format:
2602	#
2603	# N% Percent of current total data range. Converted to
2604	# to a relative value between 0.0 and 1.0.
2605	# N Absolute value of marker. If the marker is outside of
2606	# the current range, it will be displayed on the outer
2607	# edge of the legends, but it range it represents will
2608	# not be seen.
2609	#
2610	itcl::body Rappture::VtkVolumeViewer::ParseMarkersOption { cname markers } {
2611	set c $itk_component(legend)
2612	set list {}
2613	foreach { min max } $_limits($cname) break
2614	regsub -all "," $markers " " markers
2615	foreach marker $markers {
2616	set n [scan $marker "%g%s" value suffix]
2617	if { $n == 2 && $suffix == "%" } {
2618	# $n% : Set relative value (0..1).
2619	lappend list [expr {$value * 0.01}]
2620	} else {
2621	# $n : absolute value, compute relative
2622	lappend list [expr {(double($value)-$min)/($max-$min)]}
2623	}
2624	}
2625	set _parsedFunction($cname) 1
2626	$_transferFunctionEditors($cname) addMarkers $list
2627	}
2628
2629	#
2630	# SetInitialTransferFunction --
2631	#
2632	# Creates a transfer function name based on the <style> settings in the
2633	# library run.xml file. This placeholder will be used later to create
2634	# and send the actual transfer function once the data info has been sent
2635	# to us by the render server. [We won't know the volume limits until the
2636	# server parses the 3D data and sends back the limits via ReceiveData.]
2637	#
2638	itcl::body Rappture::VtkVolumeViewer::SetInitialTransferFunction { dataobj cname } {
2639	set tag $dataobj-$cname
2640	if { ![info exists _cname2transferFunction($cname)] } {
2641	ComputeTransferFunction $cname
2642	}
2643	set _dataset2style($tag) $cname
2644	lappend _style2datasets($cname) $tag
2645
2646	return $cname
2647	}
2648
2649	#
2650	# ComputeTransferFunction --
2651	#
2652	# Computes and sends the transfer function to the render server. It's
2653	# assumed that the volume data limits are known and that the global
2654	# transfer-functions slider values have been set up. Both parts are
2655	# needed to compute the relative value (location) of the marker, and
2656	# the alpha map of the transfer function.
2657	#
2658	itcl::body Rappture::VtkVolumeViewer::ComputeTransferFunction { cname } {
2659
2660	if { ![info exists _transferFunctionEditors($cname)] } {
2661	set _transferFunctionEditors($cname) \
2662	[Rappture::TransferFunctionEditor ::\#auto $itk_component(legend) \
2663	$cname \
2664	-command [itcl::code $this updateTransferFunctions]]
2665	}
2666
2667	# We have to parse the style attributes for a volume using this
2668	# transfer-function once. This sets up the initial isomarkers for the
2669	# transfer function. The user may add/delete markers, so we have to
2670	# maintain a list of markers for each transfer-function. We use the one
2671	# of the volumes (the first in the list) using the transfer-function as a
2672	# reference.
2673
2674	if { ![info exists _parsedFunction($cname)] \|\| ![info exists _cname2transferFunction($cname)] } {
2675	array set style {
2676	-color BCGYR
2677	-levels 6
2678	-opacity 1.0
2679	-markers ""
2680	}
2681
2682	# Accumulate the style from all the datasets using it.
2683	foreach tag [GetDatasetsWithComponent $cname] {
2684	foreach {dataobj cname} [split [lindex $tag 0] -] break
2685	array set style [lindex [$dataobj components -style $cname] 0]
2686	}
2687	set cmap [ColorsToColormap $style(-color)]
2688	set _cname2defaultcolormap($cname) $cmap
2689	set _settings($cname-colormap) $style(-color)
2690	if { [info exists _transferFunctionEditors($cname)] } {
2691	eval $_transferFunctionEditors($cname) limits $_limits($cname)
2692	}
2693	if { [info exists style(-markers)] &&
2694	[llength $style(-markers)] > 0 } {
2695	ParseMarkersOption $cname $style(-markers)
2696	} else {
2697	ParseLevelsOption $cname $style(-levels)
2698	}
2699	} else {
2700	foreach {cmap amap} $_cname2transferFunction($cname) break
2701	}
2702
2703	set amap [ComputeAlphamap $cname]
2704	set opaqueAmap "0.0 1.0 1.0 1.0"
2705	set _cname2transferFunction($cname) [list $cmap $amap]
2706	SendCmd [list colormap add $cname $cmap $amap]
2707	SendCmd [list colormap add $cname-opaque $cmap $opaqueAmap]
2708	}
2709
2710	#
2711	# ResetColormap --
2712	#
2713	# Changes only the colormap portion of the transfer function.
2714	#
2715	itcl::body Rappture::VtkVolumeViewer::ResetColormap { cname color } {
2716	# Get the current transfer function
2717	if { ![info exists _cname2transferFunction($cname)] } {
2718	return
2719	}
2720	foreach { cmap amap } $_cname2transferFunction($cname) break
2721	set cmap [GetColormap $cname $color]
2722	set _cname2transferFunction($cname) [list $cmap $amap]
2723	set opaqueAmap "0.0 1.0 1.0 1.0"
2724	SendCmd [list colormap add $cname $cmap $amap]
2725	SendCmd [list colormap add $cname-opaque $cmap $opaqueAmap]
2726	EventuallyRequestLegend
2727	}
2728
2729	# ----------------------------------------------------------------------
2730	# USAGE: updateTransferFunctions
2731	#
2732	# This is called by the transfer function editor whenever the
2733	# transfer function definition changes.
2734	#
2735	# ----------------------------------------------------------------------
2736	itcl::body Rappture::VtkVolumeViewer::updateTransferFunctions {} {
2737	foreach cname [array names _volcomponents] {
2738	ComputeTransferFunction $cname
2739	}
2740	EventuallyRequestLegend
2741	}
2742
2743	itcl::body Rappture::VtkVolumeViewer::AddNewMarker { x y } {
2744	if { ![info exists _transferFunctionEditors($_current)] } {
2745	continue
2746	}
2747	# Add a new marker to the current transfer function
2748	$_transferFunctionEditors($_current) newMarker $x $y normal
2749	}
2750
2751	itcl::body Rappture::VtkVolumeViewer::RemoveMarker { x y } {
2752	if { ![info exists _transferFunctionEditors($_current)] } {
2753	continue
2754	}
2755	# Add a new marker to the current transfer function
2756	$_transferFunctionEditors($_current) deleteMarker $x $y
2757	}
2758
2759	itcl::body Rappture::VtkVolumeViewer::SetOrientation { side } {
2760	array set positions {
2761	front "1 0 0 0"
2762	back "0 0 1 0"
2763	left "0.707107 0 -0.707107 0"
2764	right "0.707107 0 0.707107 0"
2765	top "0.707107 -0.707107 0 0"
2766	bottom "0.707107 0.707107 0 0"
2767	}
2768	foreach name { qw qx qy qz } value $positions($side) {
2769	set _view($name) $value
2770	}
2771	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
2772	$_arcball quaternion $q
2773	SendCmd "camera orient $q"
2774	SendCmd "camera reset"
2775	set _view(xpan) 0
2776	set _view(ypan) 0
2777	set _view(zoom) 1.0
2778	set _settings($this-xpan) $_view(xpan)
2779	set _settings($this-ypan) $_view(ypan)
2780	set _settings($this-zoom) $_view(zoom)
2781	}
2782
2783	#
2784	# InitComponentSettings --
2785	#
2786	# Initializes the volume settings for a specific component. This
2787	# should match what's used as global settings above. This
2788	# is called the first time we try to switch to a given component
2789	# in SwitchComponent below.
2790	#
2791	itcl::body Rappture::VtkVolumeViewer::InitComponentSettings { cname } {
2792	array set _settings [subst {
2793	$cname-colormap default
2794	$cname-light2side 1
2795	$cname-outline 0
2796	$cname-volumeAmbient 40
2797	$cname-volumeBlendMode composite
2798	$cname-volumeDiffuse 60
2799	$cname-volumeLighting 1
2800	$cname-volumeOpacity 50
2801	$cname-volumeQuality 80
2802	$cname-volumeSpecularExponent 90
2803	$cname-volumeSpecularLevel 30
2804	$cname-volumeThickness 350
2805	$cname-volumeVisible 1
2806	}]
2807	}
2808
2809	#
2810	# SwitchComponent --
2811	#
2812	# This is called when the current component is changed by the
2813	# dropdown menu in the volume tab. It synchronizes the global
2814	# volume settings with the settings of the new current component.
2815	#
2816	itcl::body Rappture::VtkVolumeViewer::SwitchComponent { cname } {
2817	if { ![info exists _settings(${cname}-volumeAmbient)] } {
2818	InitComponentSettings $cname
2819	}
2820	# _settings variables change widgets, except for colormap
2821	foreach name {
2822	light2side
2823	outline
2824	volumeAmbient
2825	volumeBlendMode
2826	volumeDiffuse
2827	volumeLighting
2828	volumeOpacity
2829	volumeQuality
2830	volumeSpecularExponent
2831	volumeSpecularLevel
2832	volumeThickness
2833	volumeVisible
2834	} {
2835	set _settings($name) $_settings(${cname}-${name})
2836	}
2837	$itk_component(colormap) value $_settings($cname-colormap)
2838	set _current $cname; # Reset the current component
2839	}
2840
2841	itcl::body Rappture::VtkVolumeViewer::ComputeAlphamap { cname } {
2842	if { ![info exists _transferFunctionEditors($cname)] } {
2843	return [list 0.0 0.0 1.0 1.0]
2844	}
2845	if { ![info exists _settings($cname-volumeAmbient)] } {
2846	InitComponentSettings $cname
2847	}
2848	set max 1.0 ; #$_settings($tag-opacity)
2849
2850	set isovalues [$_transferFunctionEditors($cname) values]
2851
2852	# Ensure that the global opacity and thickness settings (in the slider
2853	# settings widgets) are used for the active transfer-function. Update
2854	# the values in the _settings varible.
2855	set opacity [expr { double($_settings($cname-volumeOpacity)) * 0.01 }]
2856
2857	# Scale values between 0.00001 and 0.01000
2858	set delta [expr {double($_settings($cname-volumeThickness)) * 0.0001}]
2859	set first [lindex $isovalues 0]
2860	set last [lindex $isovalues end]
2861	set amap ""
2862	if { $first == "" \|\| $first != 0.0 } {
2863	lappend amap 0.0 0.0
2864	}
2865	foreach x $isovalues {
2866	set x1 [expr {$x-$delta-0.00001}]
2867	set x2 [expr {$x-$delta}]
2868	set x3 [expr {$x+$delta}]
2869	set x4 [expr {$x+$delta+0.00001}]
2870	if { $x1 < 0.0 } {
2871	set x1 0.0
2872	} elseif { $x1 > 1.0 } {
2873	set x1 1.0
2874	}
2875	if { $x2 < 0.0 } {
2876	set x2 0.0
2877	} elseif { $x2 > 1.0 } {
2878	set x2 1.0
2879	}
2880	if { $x3 < 0.0 } {
2881	set x3 0.0
2882	} elseif { $x3 > 1.0 } {
2883	set x3 1.0
2884	}
2885	if { $x4 < 0.0 } {
2886	set x4 0.0
2887	} elseif { $x4 > 1.0 } {
2888	set x4 1.0
2889	}
2890	# add spikes in the middle
2891	lappend amap $x1 0.0
2892	lappend amap $x2 $max
2893	lappend amap $x3 $max
2894	lappend amap $x4 0.0
2895	}
2896	if { $last == "" \|\| $last != 1.0 } {
2897	lappend amap 1.0 0.0
2898	}
2899	return $amap
2900	}
2901
2902	#
2903	# HideAllMarkers --
2904	#
2905	# Hide all the markers in all the transfer functions. Can't simply
2906	# delete and recreate markers from the <style> since the user may
2907	# have create, deleted, or moved markers.
2908	#
2909	itcl::body Rappture::VtkVolumeViewer::HideAllMarkers {} {
2910	foreach cname [array names _transferFunctionEditors] {
2911	$_transferFunctionEditors($cname) hideMarkers
2912	}
2913	}
2914
2915
2916	#
2917	# GetDatasetsWithComponents --
2918	#
2919	# Returns a list of all the datasets (known by the combination of
2920	# their data object and component name) that match the given
2921	# component name. For example, this is used where we want to change
2922	# the settings of volumes that have the current component.
2923	#
2924	itcl::body Rappture::VtkVolumeViewer::GetDatasetsWithComponent { cname } {
2925	if { ![info exists _volcomponents($cname)] } {
2926	return ""
2927	}
2928	return $_volcomponents($cname)
2929	}
2930
2931	#
2932	# BuildVolumeComponents --
2933	#
2934	# This is called from the "scale" method which is called when a
2935	# new dataset is added or deleted. It repopulates the dropdown
2936	# menu of volume component names. It sets the current component
2937	# to the first component in the list (of components found).
2938	# Finally, if there is only one component, don't display the
2939	# label or the combobox in the volume settings tab.
2940	#
2941	itcl::body Rappture::VtkVolumeViewer::BuildVolumeComponents {} {
2942	$itk_component(volcomponents) choices delete 0 end
2943	foreach name $_componentsList {
2944	$itk_component(volcomponents) choices insert end $name $name
2945	}
2946	set _current [lindex $_componentsList 0]
2947	$itk_component(volcomponents) value $_current
2948	set parent [winfo parent $itk_component(volcomponents)]
2949	if { [llength $_componentsList] <= 1 } {
2950	# Unpack the components label and dropdown if there's only one
2951	# component.
2952	blt::table forget $parent.volcomponents_l $parent.volcomponents
2953	} else {
2954	# Pack the components label and dropdown into the table there's
2955	# more than one component to select.
2956	blt::table $parent \
2957	0,0 $parent.volcomponents_l -anchor e -cspan 2 \
2958	0,2 $parent.volcomponents -cspan 3 -fill x
2959	}
2960	}
2961
2962	itcl::body Rappture::VtkVolumeViewer::GetColormap { cname color } {
2963	if { $color == "default" } {
2964	return $_cname2defaultcolormap($cname)
2965	}
2966	return [ColorsToColormap $color]
2967	}

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