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source: trunk/gui/scripts/vtkvolumeviewer.tcl @ 4048

Last change on this file since 4048 was 4048, checked in by ldelgass, 10 years ago
More colormap fixes for cutplanes
File size: 97.5 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 BuildVolumeComponents {}
67	private method ComputeAlphamap { cname }
68	private method ComputeTransferFunction { cname }
69	private method GetColormap { cname color }
70	private method GetDatasetsWithComponent { cname }
71	private method HideAllMarkers {}
72	private method InitComponentSettings { cname }
73	private method ParseLevelsOption { cname levels }
74	private method ParseMarkersOption { cname markers }
75	private method ResetColormap { cname color }
76	private method SendTransferFunctions {}
77	private method SetInitialTransferFunction { dataobj cname }
78	private method SetOrientation { side }
79	private method SwitchComponent { cname }
80
81	private variable _current ""; # Currently selected component
82	private variable _volcomponents ; # Array of components found
83	private variable _componentsList ; # Array of components found
84	private variable _cname2style
85	private variable _cname2transferFunction
86	private variable _cname2defaultcolormap
87	private variable _cname2defaultalphamap
88
89	private variable _parsedFunction
90	private variable _transferFunctionEditors
91
92	protected method Connect {}
93	protected method CurrentDatasets {args}
94	protected method Disconnect {}
95	protected method DoResize {}
96	protected method DoRotate {}
97	protected method AdjustSetting {what {value ""}}
98	protected method InitSettings { args }
99	protected method Pan {option x y}
100	protected method Pick {x y}
101	protected method Rebuild {}
102	protected method ReceiveDataset { args }
103	protected method ReceiveImage { args }
104	protected method ReceiveLegend { colormap title vmin vmax size }
105	protected method Rotate {option x y}
106	protected method Zoom {option}
107
108	# The following methods are only used by this class.
109
110	private method BuildAxisTab {}
111	private method BuildCameraTab {}
112	private method BuildCutplaneTab {}
113	private method BuildDownloadPopup { widget command }
114	private method BuildVolumeTab {}
115	private method DrawLegend {}
116	private method DrawLegendOld {}
117	private method Combo { option }
118	private method EnterLegend { x y }
119	private method EventuallyResize { w h }
120	private method EventuallyRequestLegend {}
121	private method EventuallyRotate { q }
122	private method EventuallySetCutplane { axis args }
123	private method GetImage { args }
124	private method GetVtkData { args }
125	private method IsValidObject { dataobj }
126	private method LeaveLegend {}
127	private method MotionLegend { x y }
128	private method PanCamera {}
129	private method RequestLegend {}
130	private method SetLegendTip { x y }
131	private method SetObjectStyle { dataobj comp }
132	private method Slice {option args}
133
134	private variable _arcball ""
135	private variable _dlist "" ; # list of data objects
136	private variable _obj2datasets
137	private variable _obj2ovride ; # maps dataobj => style override
138	private variable _datasets ; # contains all the dataobj-component
139	; # datasets in the server
140	private variable _colormaps ; # contains all the colormaps
141	; # in the server.
142	private variable _dataset2style ;# maps dataobj-component to transfunc
143
144	private variable _click ; # info used for rotate operations
145	private variable _limits ; # autoscale min/max for all axes
146	private variable _view ; # view params for 3D view
147	private variable _settings
148	private variable _style; # Array of current component styles.
149	private variable _initialStyle; # Array of initial component styles.
150	private variable _reset 1; # indicates if camera needs to be reset
151	# to starting position.
152
153	private variable _first "" ; # This is the topmost dataset.
154	private variable _start 0
155	private variable _title ""
156	private variable _seeds
157
158	common _downloadPopup; # download options from popup
159	private common _hardcopy
160	private variable _width 0
161	private variable _height 0
162	private variable _resizePending 0
163	private variable _rotatePending 0
164	private variable _cutplanePending 0
165	private variable _legendPending 0
166	private variable _fields
167	private variable _curFldName ""
168	private variable _curFldLabel ""
169	private variable _colorMode "scalar";# Mode of colormap (vmag or scalar)
170	}
171
172	itk::usual VtkVolumeViewer {
173	keep -background -foreground -cursor -font
174	keep -plotbackground -plotforeground
175	}
176
177	# ----------------------------------------------------------------------
178	# CONSTRUCTOR
179	# ----------------------------------------------------------------------
180	itcl::body Rappture::VtkVolumeViewer::constructor {hostlist args} {
181	package require vtk
182	set _serverType "vtkvis"
183
184	EnableWaitDialog 900
185
186	# Rebuild event
187	$_dispatcher register !rebuild
188	$_dispatcher dispatch $this !rebuild "[itcl::code $this Rebuild]; list"
189
190	# Resize event
191	$_dispatcher register !resize
192	$_dispatcher dispatch $this !resize "[itcl::code $this DoResize]; list"
193
194	# Rotate event
195	$_dispatcher register !rotate
196	$_dispatcher dispatch $this !rotate "[itcl::code $this DoRotate]; list"
197
198	# Legend event
199	$_dispatcher register !legend
200	$_dispatcher dispatch $this !legend "[itcl::code $this RequestLegend]; list"
201
202	# X-Cutplane event
203	$_dispatcher register !xcutplane
204	$_dispatcher dispatch $this !xcutplane \
205	"[itcl::code $this AdjustSetting cutplanePositionX]; list"
206
207	# Y-Cutplane event
208	$_dispatcher register !ycutplane
209	$_dispatcher dispatch $this !ycutplane \
210	"[itcl::code $this AdjustSetting cutplanePositionY]; list"
211
212	# Z-Cutplane event
213	$_dispatcher register !zcutplane
214	$_dispatcher dispatch $this !zcutplane \
215	"[itcl::code $this AdjustSetting cutplanePositionZ]; list"
216
217	#
218	# Populate parser with commands handle incoming requests
219	#
220	$_parser alias image [itcl::code $this ReceiveImage]
221	$_parser alias dataset [itcl::code $this ReceiveDataset]
222	$_parser alias legend [itcl::code $this ReceiveLegend]
223
224	# Initialize the view to some default parameters.
225	array set _view {
226	qw 0.853553
227	qx -0.353553
228	qy 0.353553
229	qz 0.146447
230	zoom 1.0
231	xpan 0
232	ypan 0
233	ortho 0
234	}
235	set _arcball [blt::arcball create 100 100]
236	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
237	$_arcball quaternion $q
238
239	array set _settings {
240	axesVisible 1
241	axisGridX 0
242	axisGridY 0
243	axisGridZ 0
244	axisLabels 1
245	cutplaneEdges 0
246	cutplaneLighting 1
247	cutplaneOpacity 100
248	cutplanePositionX 50
249	cutplanePositionY 50
250	cutplanePositionZ 50
251	cutplaneVisible 0
252	cutplaneVisibleX 1
253	cutplaneVisibleY 1
254	cutplaneVisibleZ 1
255	cutplaneWireframe 0
256	legendVisible 1
257	volumeAmbient 40
258	volumeBlendMode composite
259	volumeDiffuse 60
260	volumeLighting 1
261	volumeOpacity 50
262	volumeQuality 50
263	volumeSpecularExponent 90
264	volumeSpecularLevel 30
265	volumeThickness 350
266	volumeVisible 1
267	}
268
269	itk_component add view {
270	canvas $itk_component(plotarea).view \
271	-highlightthickness 0 -borderwidth 0
272	} {
273	usual
274	ignore -highlightthickness -borderwidth -background
275	}
276
277	itk_component add fieldmenu {
278	menu $itk_component(plotarea).menu -bg black -fg white -relief flat \
279	-tearoff no
280	} {
281	usual
282	ignore -background -foreground -relief -tearoff
283	}
284	set c $itk_component(view)
285	bind $c <Configure> [itcl::code $this EventuallyResize %w %h]
286	bind $c <4> [itcl::code $this Zoom in 0.25]
287	bind $c <5> [itcl::code $this Zoom out 0.25]
288	bind $c <KeyPress-Left> [list %W xview scroll 10 units]
289	bind $c <KeyPress-Right> [list %W xview scroll -10 units]
290	bind $c <KeyPress-Up> [list %W yview scroll 10 units]
291	bind $c <KeyPress-Down> [list %W yview scroll -10 units]
292	bind $c <Enter> "focus %W"
293	bind $c <Control-F1> [itcl::code $this ToggleConsole]
294
295	# Fixes the scrollregion in case we go off screen
296	$c configure -scrollregion [$c bbox all]
297
298	set _map(id) [$c create image 0 0 -anchor nw -image $_image(plot)]
299	set _map(cwidth) -1
300	set _map(cheight) -1
301	set _map(zoom) 1.0
302	set _map(original) ""
303
304	set f [$itk_component(main) component controls]
305	itk_component add reset {
306	button $f.reset -borderwidth 1 -padx 1 -pady 1 \
307	-highlightthickness 0 \
308	-image [Rappture::icon reset-view] \
309	-command [itcl::code $this Zoom reset]
310	} {
311	usual
312	ignore -highlightthickness
313	}
314	pack $itk_component(reset) -side top -padx 2 -pady 2
315	Rappture::Tooltip::for $itk_component(reset) "Reset the view to the default zoom level"
316
317	itk_component add zoomin {
318	button $f.zin -borderwidth 1 -padx 1 -pady 1 \
319	-highlightthickness 0 \
320	-image [Rappture::icon zoom-in] \
321	-command [itcl::code $this Zoom in]
322	} {
323	usual
324	ignore -highlightthickness
325	}
326	pack $itk_component(zoomin) -side top -padx 2 -pady 2
327	Rappture::Tooltip::for $itk_component(zoomin) "Zoom in"
328
329	itk_component add zoomout {
330	button $f.zout -borderwidth 1 -padx 1 -pady 1 \
331	-highlightthickness 0 \
332	-image [Rappture::icon zoom-out] \
333	-command [itcl::code $this Zoom out]
334	} {
335	usual
336	ignore -highlightthickness
337	}
338	pack $itk_component(zoomout) -side top -padx 2 -pady 2
339	Rappture::Tooltip::for $itk_component(zoomout) "Zoom out"
340
341	itk_component add volume {
342	Rappture::PushButton $f.volume \
343	-onimage [Rappture::icon volume-on] \
344	-offimage [Rappture::icon volume-off] \
345	-variable [itcl::scope _settings(volumeVisible)] \
346	-command [itcl::code $this AdjustSetting volumeVisible]
347	}
348	$itk_component(volume) select
349	Rappture::Tooltip::for $itk_component(volume) \
350	"Don't display the volume"
351	pack $itk_component(volume) -padx 2 -pady 2
352
353	itk_component add cutplane {
354	Rappture::PushButton $f.cutplane \
355	-onimage [Rappture::icon cutbutton] \
356	-offimage [Rappture::icon cutbutton] \
357	-variable [itcl::scope _settings(cutplaneVisible)] \
358	-command [itcl::code $this AdjustSetting cutplaneVisible]
359	}
360	Rappture::Tooltip::for $itk_component(cutplane) \
361	"Show/Hide cutplanes"
362	pack $itk_component(cutplane) -padx 2 -pady 2
363
364
365	if { [catch {
366	BuildVolumeTab
367	BuildCutplaneTab
368	BuildAxisTab
369	BuildCameraTab
370	} errs] != 0 } {
371	puts stderr errs=$errs
372	}
373	# Legend
374
375	set _image(legend) [image create photo]
376	itk_component add legend {
377	canvas $itk_component(plotarea).legend -height 50 -highlightthickness 0
378	} {
379	usual
380	ignore -highlightthickness
381	rename -background -plotbackground plotBackground Background
382	}
383
384	# Hack around the Tk panewindow. The problem is that the requested
385	# size of the 3d view isn't set until an image is retrieved from
386	# the server. So the panewindow uses the tiny size.
387	set w 10000
388	pack forget $itk_component(view)
389	blt::table $itk_component(plotarea) \
390	0,0 $itk_component(view) -fill both -reqwidth $w \
391	1,0 $itk_component(legend) -fill x
392	blt::table configure $itk_component(plotarea) r1 -resize none
393
394	# Bindings for rotation via mouse
395	bind $itk_component(view) <ButtonPress-1> \
396	[itcl::code $this Rotate click %x %y]
397	bind $itk_component(view) <B1-Motion> \
398	[itcl::code $this Rotate drag %x %y]
399	bind $itk_component(view) <ButtonRelease-1> \
400	[itcl::code $this Rotate release %x %y]
401	bind $itk_component(view) <Configure> \
402	[itcl::code $this EventuallyResize %w %h]
403
404	if 0 {
405	bind $itk_component(view) <Configure> \
406	[itcl::code $this EventuallyResize %w %h]
407	}
408	# Bindings for panning via mouse
409	bind $itk_component(view) <ButtonPress-2> \
410	[itcl::code $this Pan click %x %y]
411	bind $itk_component(view) <B2-Motion> \
412	[itcl::code $this Pan drag %x %y]
413	bind $itk_component(view) <ButtonRelease-2> \
414	[itcl::code $this Pan release %x %y]
415
416	#bind $itk_component(view) <ButtonRelease-3> \
417	# [itcl::code $this Pick %x %y]
418
419	# Bindings for panning via keyboard
420	bind $itk_component(view) <KeyPress-Left> \
421	[itcl::code $this Pan set -10 0]
422	bind $itk_component(view) <KeyPress-Right> \
423	[itcl::code $this Pan set 10 0]
424	bind $itk_component(view) <KeyPress-Up> \
425	[itcl::code $this Pan set 0 -10]
426	bind $itk_component(view) <KeyPress-Down> \
427	[itcl::code $this Pan set 0 10]
428	bind $itk_component(view) <Shift-KeyPress-Left> \
429	[itcl::code $this Pan set -2 0]
430	bind $itk_component(view) <Shift-KeyPress-Right> \
431	[itcl::code $this Pan set 2 0]
432	bind $itk_component(view) <Shift-KeyPress-Up> \
433	[itcl::code $this Pan set 0 -2]
434	bind $itk_component(view) <Shift-KeyPress-Down> \
435	[itcl::code $this Pan set 0 2]
436
437	# Bindings for zoom via keyboard
438	bind $itk_component(view) <KeyPress-Prior> \
439	[itcl::code $this Zoom out]
440	bind $itk_component(view) <KeyPress-Next> \
441	[itcl::code $this Zoom in]
442
443	bind $itk_component(view) <Enter> "focus $itk_component(view)"
444
445	if {[string equal "x11" [tk windowingsystem]]} {
446	# Bindings for zoom via mouse
447	bind $itk_component(view) <4> [itcl::code $this Zoom out]
448	bind $itk_component(view) <5> [itcl::code $this Zoom in]
449	}
450
451	set _image(download) [image create photo]
452
453	eval itk_initialize $args
454	Connect
455	}
456
457	# ----------------------------------------------------------------------
458	# DESTRUCTOR
459	# ----------------------------------------------------------------------
460	itcl::body Rappture::VtkVolumeViewer::destructor {} {
461	Disconnect
462	image delete $_image(plot)
463	image delete $_image(download)
464	catch { blt::arcball destroy $_arcball }
465	}
466
467	itcl::body Rappture::VtkVolumeViewer::DoResize {} {
468	if { $_width < 2 } {
469	set _width 500
470	}
471	if { $_height < 2 } {
472	set _height 500
473	}
474	set _start [clock clicks -milliseconds]
475	SendCmd "screen size $_width $_height"
476
477	EventuallyRequestLegend
478	set _resizePending 0
479	}
480
481	itcl::body Rappture::VtkVolumeViewer::DoRotate {} {
482	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
483	SendCmd "camera orient $q"
484	set _rotatePending 0
485	}
486
487	itcl::body Rappture::VtkVolumeViewer::EventuallyResize { w h } {
488	set _width $w
489	set _height $h
490	$_arcball resize $w $h
491	if { !$_resizePending } {
492	set _resizePending 1
493	$_dispatcher event -after 400 !resize
494	}
495	}
496
497	itcl::body Rappture::VtkVolumeViewer::EventuallyRequestLegend {} {
498	if { !$_legendPending } {
499	set _legendPending 1
500	$_dispatcher event -after 600 !legend
501	}
502	}
503
504	set rotate_delay 100
505
506	itcl::body Rappture::VtkVolumeViewer::EventuallyRotate { q } {
507	foreach { _view(qw) _view(qx) _view(qy) _view(qz) } $q break
508	if { !$_rotatePending } {
509	set _rotatePending 1
510	global rotate_delay
511	$_dispatcher event -after $rotate_delay !rotate
512	}
513	}
514
515	itcl::body Rappture::VtkVolumeViewer::EventuallySetCutplane { axis args } {
516	if { !$_cutplanePending } {
517	set _cutplanePending 1
518	$_dispatcher event -after 100 !${axis}cutplane
519	}
520	}
521
522	# ----------------------------------------------------------------------
523	# USAGE: add <dataobj> ?<settings>?
524	#
525	# Clients use this to add a data object to the plot. The optional
526	# <settings> are used to configure the plot. Allowed settings are
527	# -color, -brightness, -width, -linestyle, and -raise.
528	# ----------------------------------------------------------------------
529	itcl::body Rappture::VtkVolumeViewer::add {dataobj {settings ""}} {
530	if { ![IsValidObject $dataobj] } {
531	return; # Ignore invalid objects.
532	}
533	array set params {
534	-color auto
535	-width 1
536	-linestyle solid
537	-brightness 0
538	-raise 0
539	-description ""
540	-param ""
541	-type ""
542	}
543	array set params $settings
544	set params(-description) ""
545	set params(-param) ""
546	array set params $settings
547
548	if {$params(-color) == "auto" \|\| $params(-color) == "autoreset"} {
549	# can't handle -autocolors yet
550	set params(-color) black
551	}
552	set pos [lsearch -exact $_dlist $dataobj]
553	if {$pos < 0} {
554	lappend _dlist $dataobj
555	}
556	set _obj2ovride($dataobj-color) $params(-color)
557	set _obj2ovride($dataobj-width) $params(-width)
558	set _obj2ovride($dataobj-raise) $params(-raise)
559	$_dispatcher event -idle !rebuild
560	}
561
562
563	# ----------------------------------------------------------------------
564	# USAGE: delete ?<dataobj1> <dataobj2> ...?
565	#
566	# Clients use this to delete a dataobj from the plot. If no dataobjs
567	# are specified, then all dataobjs are deleted. No data objects are
568	# deleted. They are only removed from the display list.
569	#
570	# ----------------------------------------------------------------------
571	itcl::body Rappture::VtkVolumeViewer::delete {args} {
572	if { [llength $args] == 0} {
573	set args $_dlist
574	}
575	# Delete all specified dataobjs
576	set changed 0
577	foreach dataobj $args {
578	set pos [lsearch -exact $_dlist $dataobj]
579	if { $pos < 0 } {
580	continue; # Don't know anything about it.
581	}
582	# Remove it from the dataobj list.
583	set _dlist [lreplace $_dlist $pos $pos]
584	array unset _obj2ovride $dataobj-*
585	array unset _settings $dataobj-*
586	set changed 1
587	}
588	# If anything changed, then rebuild the plot
589	if { $changed } {
590	$_dispatcher event -idle !rebuild
591	}
592	}
593
594	# ----------------------------------------------------------------------
595	# USAGE: get ?-objects?
596	# USAGE: get ?-visible?
597	# USAGE: get ?-image view?
598	#
599	# Clients use this to query the list of objects being plotted, in
600	# order from bottom to top of this result. The optional "-image"
601	# flag can also request the internal images being shown.
602	# ----------------------------------------------------------------------
603	itcl::body Rappture::VtkVolumeViewer::get {args} {
604	if {[llength $args] == 0} {
605	set args "-objects"
606	}
607
608	set op [lindex $args 0]
609	switch -- $op {
610	"-objects" {
611	# put the dataobj list in order according to -raise options
612	set dlist {}
613	foreach dataobj $_dlist {
614	if { ![IsValidObject $dataobj] } {
615	continue
616	}
617	if {[info exists _obj2ovride($dataobj-raise)] &&
618	$_obj2ovride($dataobj-raise)} {
619	set dlist [linsert $dlist 0 $dataobj]
620	} else {
621	lappend dlist $dataobj
622	}
623	}
624	return $dlist
625	}
626	"-visible" {
627	set dlist {}
628	foreach dataobj $_dlist {
629	if { ![IsValidObject $dataobj] } {
630	continue
631	}
632	if { ![info exists _obj2ovride($dataobj-raise)] } {
633	# No setting indicates that the object isn't visible.
634	continue
635	}
636	# Otherwise use the -raise parameter to put the object to
637	# the front of the list.
638	if { $_obj2ovride($dataobj-raise) } {
639	set dlist [linsert $dlist 0 $dataobj]
640	} else {
641	lappend dlist $dataobj
642	}
643	}
644	return $dlist
645	}
646	-image {
647	if {[llength $args] != 2} {
648	error "wrong # args: should be \"get -image view\""
649	}
650	switch -- [lindex $args end] {
651	view {
652	return $_image(plot)
653	}
654	default {
655	error "bad image name \"[lindex $args end]\": should be view"
656	}
657	}
658	}
659	default {
660	error "bad option \"$op\": should be -objects or -image"
661	}
662	}
663	}
664
665	# ----------------------------------------------------------------------
666	# USAGE: scale ?<data1> <data2> ...?
667	#
668	# Sets the default limits for the overall plot according to the
669	# limits of the data for all of the given <data> objects. This
670	# accounts for all objects--even those not showing on the screen.
671	# Because of this, the limits are appropriate for all objects as
672	# the user scans through data in the ResultSet viewer.
673	# ----------------------------------------------------------------------
674	itcl::body Rappture::VtkVolumeViewer::scale {args} {
675	array set style {
676	-color BCGYR
677	-levels 6
678	-opacity 1.0
679	-markers ""
680	}
681	array unset _limits
682	array unset _volcomponents
683
684	foreach dataobj $args {
685	if { ![$dataobj isvalid] } {
686	continue; # Object doesn't contain valid data.
687	}
688	# Determine limits for each axis.
689	foreach axis {x y z v} {
690	foreach { min max } [$dataobj limits $axis] break
691	if {"" != $min && "" != $max} {
692	if { ![info exists _limits($axis)] } {
693	set _limits($axis) [list $min $max]
694	} else {
695	foreach {amin amax} $_limits($axis) break
696	if {$min < $amin} {
697	set amin $min
698	}
699	if {$max > $amax} {
700	set amax $max
701	}
702	set _limits($axis) [list $amin $amax]
703	}
704	}
705	}
706	# Determine limits for each field.
707	foreach { fname lim } [$dataobj fieldlimits] {
708	if { ![info exists _limits($fname)] } {
709	set _limits($fname) $lim
710	continue
711	}
712	foreach {min max} $lim break
713	foreach {fmin fmax} $_limits($fname) break
714	if { $fmin > $min } {
715	set fmin $min
716	}
717	if { $fmax < $max } {
718	set fmax $max
719	}
720	set _limits($fname) [list $fmin $fmax]
721	}
722	# Get limits for each component.
723	foreach cname [$dataobj components] {
724	if { ![info exists _volcomponents($cname)] } {
725	lappend _componentsList $cname
726	}
727	lappend _volcomponents($cname) $dataobj-$cname
728	array unset limits
729	array set limits [$dataobj valueLimits $cname]
730	foreach {min max} $limits(v) break
731	if { ![info exists _limits($cname)] } {
732	set _limits($cname) [list $min $max]
733	} else {
734	foreach {vmin vmax} $_limits($cname) break
735	if { $min < $vmin } {
736	set vmin $min
737	}
738	if { $max > $vmax } {
739	set vmax $max
740	}
741	set _limits($cname) [list $vmin $vmax]
742	}
743	}
744	}
745	BuildVolumeComponents
746	updateTransferFunctions
747	}
748
749	# ----------------------------------------------------------------------
750	# USAGE: download coming
751	# USAGE: download controls <downloadCommand>
752	# USAGE: download now
753	#
754	# Clients use this method to create a downloadable representation
755	# of the plot. Returns a list of the form {ext string}, where
756	# "ext" is the file extension (indicating the type of data) and
757	# "string" is the data itself.
758	# ----------------------------------------------------------------------
759	itcl::body Rappture::VtkVolumeViewer::download {option args} {
760	switch $option {
761	coming {
762	if {[catch {
763	blt::winop snap $itk_component(plotarea) $_image(download)
764	}]} {
765	$_image(download) configure -width 1 -height 1
766	$_image(download) put #000000
767	}
768	}
769	controls {
770	set popup .vtkviewerdownload
771	if { ![winfo exists .vtkviewerdownload] } {
772	set inner [BuildDownloadPopup $popup [lindex $args 0]]
773	} else {
774	set inner [$popup component inner]
775	}
776	set _downloadPopup(image_controls) $inner.image_frame
777	set num [llength [get]]
778	set num [expr {($num == 1) ? "1 result" : "$num results"}]
779	set word [Rappture::filexfer::label downloadWord]
780	$inner.summary configure -text "$word $num in the following format:"
781	update idletasks ;# Fix initial sizes
782	return $popup
783	}
784	now {
785	set popup .vtkviewerdownload
786	if {[winfo exists .vtkviewerdownload]} {
787	$popup deactivate
788	}
789	switch -- $_downloadPopup(format) {
790	"image" {
791	return [$this GetImage [lindex $args 0]]
792	}
793	"vtk" {
794	return [$this GetVtkData [lindex $args 0]]
795	}
796	}
797	return ""
798	}
799	default {
800	error "bad option \"$option\": should be coming, controls, now"
801	}
802	}
803	}
804
805	# ----------------------------------------------------------------------
806	# USAGE: Connect ?<host:port>,<host:port>...?
807	#
808	# Clients use this method to establish a connection to a new
809	# server, or to reestablish a connection to the previous server.
810	# Any existing connection is automatically closed.
811	# ----------------------------------------------------------------------
812	itcl::body Rappture::VtkVolumeViewer::Connect {} {
813	set _hosts [GetServerList "vtkvis"]
814	if { "" == $_hosts } {
815	return 0
816	}
817	set result [VisViewer::Connect $_hosts]
818	if { $result } {
819	if { $_reportClientInfo } {
820	# Tell the server the viewer, hub, user and session.
821	# Do this immediately on connect before buffing any commands
822	global env
823
824	set info {}
825	set user "???"
826	if { [info exists env(USER)] } {
827	set user $env(USER)
828	}
829	set session "???"
830	if { [info exists env(SESSION)] } {
831	set session $env(SESSION)
832	}
833	lappend info "hub" [exec hostname]
834	lappend info "client" "vtkvolumeviewer"
835	lappend info "user" $user
836	lappend info "session" $session
837	SendCmd "clientinfo [list $info]"
838	}
839
840	set w [winfo width $itk_component(view)]
841	set h [winfo height $itk_component(view)]
842	EventuallyResize $w $h
843	}
844	$_dispatcher event -idle !rebuild
845	return $result
846	}
847
848	#
849	# isconnected --
850	#
851	# Indicates if we are currently connected to the visualization server.
852	#
853	itcl::body Rappture::VtkVolumeViewer::isconnected {} {
854	return [VisViewer::IsConnected]
855	}
856
857	#
858	# disconnect --
859	#
860	itcl::body Rappture::VtkVolumeViewer::disconnect {} {
861	Disconnect
862	}
863
864	#
865	# Disconnect --
866	#
867	# Clients use this method to disconnect from the current rendering
868	# server.
869	#
870	itcl::body Rappture::VtkVolumeViewer::Disconnect {} {
871	VisViewer::Disconnect
872
873	$_dispatcher cancel !rebuild
874	$_dispatcher cancel !resize
875	$_dispatcher cancel !rotate
876	$_dispatcher cancel !xcutplane
877	$_dispatcher cancel !ycutplane
878	$_dispatcher cancel !zcutplane
879	$_dispatcher cancel !legend
880	# disconnected -- no more data sitting on server
881	set _outbuf ""
882	array unset _datasets
883	array unset _data
884	array unset _colormaps
885	array unset _seeds
886	array unset _dataset2style
887	array unset _obj2datasets
888
889	array unset _cname2style
890	array unset _parsedFunction
891	array unset _cname2transferFunction
892
893	set _resizePending 0
894	set _rotatePending 0
895	set _cutplanePending 0
896	set _legendPending 0
897	set _reset 1
898	}
899
900	# ----------------------------------------------------------------------
901	# USAGE: ReceiveImage -bytes <size> -type <type> -token <token>
902	#
903	# Invoked automatically whenever the "image" command comes in from
904	# the rendering server. Indicates that binary image data with the
905	# specified <size> will follow.
906	# ----------------------------------------------------------------------
907	itcl::body Rappture::VtkVolumeViewer::ReceiveImage { args } {
908	array set info {
909	-token "???"
910	-bytes 0
911	-type image
912	}
913	array set info $args
914	set bytes [ReceiveBytes $info(-bytes)]
915	StopWaiting
916	if { $info(-type) == "image" } {
917	if 0 {
918	set f [open "last.ppm" "w"]
919	puts $f $bytes
920	close $f
921	}
922	$_image(plot) configure -data $bytes
923	set time [clock seconds]
924	set date [clock format $time]
925	#puts stderr "$date: received image [image width $_image(plot)]x[image height $_image(plot)] image>"
926	if { $_start > 0 } {
927	set finish [clock clicks -milliseconds]
928	#puts stderr "round trip time [expr $finish -$_start] milliseconds"
929	set _start 0
930	}
931	} elseif { $info(type) == "print" } {
932	set tag $this-print-$info(-token)
933	set _hardcopy($tag) $bytes
934	}
935	}
936
937	#
938	# ReceiveDataset --
939	#
940	itcl::body Rappture::VtkVolumeViewer::ReceiveDataset { args } {
941	if { ![isconnected] } {
942	return
943	}
944	set option [lindex $args 0]
945	switch -- $option {
946	"scalar" {
947	set option [lindex $args 1]
948	switch -- $option {
949	"world" {
950	foreach { x y z value tag } [lrange $args 2 end] break
951	}
952	"pixel" {
953	foreach { x y value tag } [lrange $args 2 end] break
954	}
955	}
956	}
957	"vector" {
958	set option [lindex $args 1]
959	switch -- $option {
960	"world" {
961	foreach { x y z vx vy vz tag } [lrange $args 2 end] break
962	}
963	"pixel" {
964	foreach { x y vx vy vz tag } [lrange $args 2 end] break
965	}
966	}
967	}
968	"names" {
969	foreach { name } [lindex $args 1] {
970	#puts stderr "Dataset: $name"
971	}
972	}
973	default {
974	error "unknown dataset option \"$option\" from server"
975	}
976	}
977	}
978
979	# ----------------------------------------------------------------------
980	# USAGE: Rebuild
981	#
982	# Called automatically whenever something changes that affects the
983	# data in the widget. Clears any existing data and rebuilds the
984	# widget to display new data.
985	# ----------------------------------------------------------------------
986	itcl::body Rappture::VtkVolumeViewer::Rebuild {} {
987	update
988	set w [winfo width $itk_component(view)]
989	set h [winfo height $itk_component(view)]
990	if { $w < 2 \|\| $h < 2 } {
991	$_dispatcher event -idle !rebuild
992	return
993	}
994
995	# Turn on buffering of commands to the server. We don't want to
996	# be preempted by a server disconnect/reconnect (which automatically
997	# generates a new call to Rebuild).
998	StartBufferingCommands
999
1000	set _legendPending 1
1001
1002	if { $_reset } {
1003	set _width $w
1004	set _height $h
1005	$_arcball resize $w $h
1006	DoResize
1007	#
1008	# Reset the camera and other view parameters
1009	#
1010	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
1011	$_arcball quaternion $q
1012	if {$_view(ortho)} {
1013	SendCmd "camera mode ortho"
1014	} else {
1015	SendCmd "camera mode persp"
1016	}
1017	DoRotate
1018	InitSettings axisGridX axisGridY axisGridZ axisFlyMode \
1019	axesVisible axisLabels
1020	PanCamera
1021	}
1022	set _first ""
1023
1024	SendCmd "imgflush"
1025	set _first ""
1026
1027	SendCmd "dataset visible 0"
1028	foreach dataobj [get -objects] {
1029	if { [info exists _obj2ovride($dataobj-raise)] && $_first == "" } {
1030	set _first $dataobj
1031	}
1032	set _obj2datasets($dataobj) ""
1033	foreach comp [$dataobj components] {
1034	set tag $dataobj-$comp
1035	if { ![info exists _datasets($tag)] } {
1036	set bytes [$dataobj vtkdata $comp]
1037	set length [string length $bytes]
1038	if { $_reportClientInfo } {
1039	set info {}
1040	lappend info "tool_id" [$dataobj hints toolId]
1041	lappend info "tool_name" [$dataobj hints toolName]
1042	lappend info "tool_version" [$dataobj hints toolRevision]
1043	lappend info "tool_title" [$dataobj hints toolTitle]
1044	lappend info "dataset_label" [$dataobj hints label]
1045	lappend info "dataset_size" $length
1046	lappend info "dataset_tag" $tag
1047	SendCmd [list "clientinfo" $info]
1048	}
1049	append _outbuf "dataset add $tag data follows $length\n"
1050	append _outbuf $bytes
1051	set _datasets($tag) 1
1052	SetObjectStyle $dataobj $comp
1053	}
1054	lappend _obj2datasets($dataobj) $tag
1055	if { [info exists _obj2ovride($dataobj-raise)] } {
1056	SendCmd "dataset visible 1 $tag"
1057	}
1058	break
1059	}
1060	}
1061	if {"" != $_first} {
1062	set location [$_first hints camera]
1063	if { $location != "" } {
1064	array set view $location
1065	}
1066
1067	foreach axis { x y z } {
1068	set label [$_first hints ${axis}label]
1069	if { $label != "" } {
1070	SendCmd "axis name $axis $label"
1071	}
1072	set units [$_first hints ${axis}units]
1073	if { $units != "" } {
1074	SendCmd "axis units $axis $units"
1075	}
1076	}
1077	$itk_component(field) choices delete 0 end
1078	$itk_component(fieldmenu) delete 0 end
1079	array unset _fields
1080	set _curFldName ""
1081	foreach cname [$_first components] {
1082	foreach fname [$_first fieldnames $cname] {
1083	if { [info exists _fields($fname)] } {
1084	continue
1085	}
1086	foreach { label units components } \
1087	[$_first fieldinfo $fname] break
1088	# Only scalar fields are valid
1089	if {$components == 1} {
1090	$itk_component(field) choices insert end "$fname" "$label"
1091	$itk_component(fieldmenu) add radiobutton -label "$label" \
1092	-value $label -variable [itcl::scope _curFldLabel] \
1093	-selectcolor red \
1094	-activebackground $itk_option(-plotbackground) \
1095	-activeforeground $itk_option(-plotforeground) \
1096	-font "Arial 8" \
1097	-command [itcl::code $this Combo invoke]
1098	set _fields($fname) [list $label $units $components]
1099	if { $_curFldName == "" } {
1100	set _curFldName $fname
1101	set _curFldLabel $label
1102	}
1103	}
1104	}
1105	}
1106	$itk_component(field) value $_curFldLabel
1107	}
1108
1109	InitSettings volumeColormap \
1110	volumeAmbient volumeDiffuse volumeSpecularLevel volumeSpecularExponent \
1111	volumeOpacity volumeQuality volumeVisible \
1112	cutplaneVisible \
1113	cutplanePositionX cutplanePositionY cutplanePositionZ \
1114	cutplaneVisibleX cutplaneVisibleY cutplaneVisibleZ
1115
1116	if { $_reset } {
1117	InitSettings volumeLighting
1118	SendCmd "camera reset"
1119	SendCmd "camera zoom $_view(zoom)"
1120	set _reset 0
1121	}
1122	# Actually write the commands to the server socket. If it fails, we don't
1123	# care. We're finished here.
1124	blt::busy hold $itk_component(hull)
1125	StopBufferingCommands
1126	blt::busy release $itk_component(hull)
1127	}
1128
1129	# ----------------------------------------------------------------------
1130	# USAGE: CurrentDatasets ?-all -visible? ?dataobjs?
1131	#
1132	# Returns a list of server IDs for the current datasets being displayed. This
1133	# is normally a single ID, but it might be a list of IDs if the current data
1134	# object has multiple components.
1135	# ----------------------------------------------------------------------
1136	itcl::body Rappture::VtkVolumeViewer::CurrentDatasets {args} {
1137	set flag [lindex $args 0]
1138	switch -- $flag {
1139	"-all" {
1140	if { [llength $args] > 1 } {
1141	error "CurrentDatasets: can't specify dataobj after \"-all\""
1142	}
1143	set dlist [get -objects]
1144	}
1145	"-visible" {
1146	if { [llength $args] > 1 } {
1147	set dlist {}
1148	set args [lrange $args 1 end]
1149	foreach dataobj $args {
1150	if { [info exists _obj2ovride($dataobj-raise)] } {
1151	lappend dlist $dataobj
1152	}
1153	}
1154	} else {
1155	set dlist [get -visible]
1156	}
1157	}
1158	default {
1159	set dlist $args
1160	}
1161	}
1162	set rlist ""
1163	foreach dataobj $dlist {
1164	foreach comp [$dataobj components] {
1165	set tag $dataobj-$comp
1166	if { [info exists _datasets($tag)] && $_datasets($tag) } {
1167	lappend rlist $tag
1168	}
1169	}
1170	}
1171	return $rlist
1172	}
1173
1174	# ----------------------------------------------------------------------
1175	# USAGE: Zoom in
1176	# USAGE: Zoom out
1177	# USAGE: Zoom reset
1178	#
1179	# Called automatically when the user clicks on one of the zoom
1180	# controls for this widget. Changes the zoom for the current view.
1181	# ----------------------------------------------------------------------
1182	itcl::body Rappture::VtkVolumeViewer::Zoom {option} {
1183	switch -- $option {
1184	"in" {
1185	set _view(zoom) [expr {$_view(zoom)*1.25}]
1186	SendCmd "camera zoom $_view(zoom)"
1187	}
1188	"out" {
1189	set _view(zoom) [expr {$_view(zoom)*0.8}]
1190	SendCmd "camera zoom $_view(zoom)"
1191	}
1192	"reset" {
1193	array set _view {
1194	qw 0.853553
1195	qx -0.353553
1196	qy 0.353553
1197	qz 0.146447
1198	zoom 1.0
1199	xpan 0
1200	ypan 0
1201	}
1202	if { $_first != "" } {
1203	set location [$_first hints camera]
1204	if { $location != "" } {
1205	array set _view $location
1206	}
1207	}
1208	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
1209	$_arcball quaternion $q
1210	DoRotate
1211	SendCmd "camera reset"
1212	}
1213	}
1214	}
1215
1216	itcl::body Rappture::VtkVolumeViewer::PanCamera {} {
1217	set x $_view(xpan)
1218	set y $_view(ypan)
1219	SendCmd "camera pan $x $y"
1220	}
1221
1222
1223	# ----------------------------------------------------------------------
1224	# USAGE: Rotate click <x> <y>
1225	# USAGE: Rotate drag <x> <y>
1226	# USAGE: Rotate release <x> <y>
1227	#
1228	# Called automatically when the user clicks/drags/releases in the
1229	# plot area. Moves the plot according to the user's actions.
1230	# ----------------------------------------------------------------------
1231	itcl::body Rappture::VtkVolumeViewer::Rotate {option x y} {
1232	switch -- $option {
1233	"click" {
1234	$itk_component(view) configure -cursor fleur
1235	set _click(x) $x
1236	set _click(y) $y
1237	}
1238	"drag" {
1239	if {[array size _click] == 0} {
1240	Rotate click $x $y
1241	} else {
1242	set w [winfo width $itk_component(view)]
1243	set h [winfo height $itk_component(view)]
1244	if {$w <= 0 \|\| $h <= 0} {
1245	return
1246	}
1247
1248	if {[catch {
1249	# this fails sometimes for no apparent reason
1250	set dx [expr {double($x-$_click(x))/$w}]
1251	set dy [expr {double($y-$_click(y))/$h}]
1252	}]} {
1253	return
1254	}
1255	if { $dx == 0 && $dy == 0 } {
1256	return
1257	}
1258	set q [$_arcball rotate $x $y $_click(x) $_click(y)]
1259	EventuallyRotate $q
1260	set _click(x) $x
1261	set _click(y) $y
1262	}
1263	}
1264	"release" {
1265	Rotate drag $x $y
1266	$itk_component(view) configure -cursor ""
1267	catch {unset _click}
1268	}
1269	default {
1270	error "bad option \"$option\": should be click, drag, release"
1271	}
1272	}
1273	}
1274
1275	itcl::body Rappture::VtkVolumeViewer::Pick {x y} {
1276	foreach tag [CurrentDatasets -visible] {
1277	SendCmd "dataset getscalar pixel $x $y $tag"
1278	}
1279	}
1280
1281	# ----------------------------------------------------------------------
1282	# USAGE: $this Pan click x y
1283	# $this Pan drag x y
1284	# $this Pan release x y
1285	#
1286	# Called automatically when the user clicks on one of the zoom
1287	# controls for this widget. Changes the zoom for the current view.
1288	# ----------------------------------------------------------------------
1289	itcl::body Rappture::VtkVolumeViewer::Pan {option x y} {
1290	switch -- $option {
1291	"set" {
1292	set w [winfo width $itk_component(view)]
1293	set h [winfo height $itk_component(view)]
1294	set x [expr $x / double($w)]
1295	set y [expr $y / double($h)]
1296	set _view(xpan) [expr $_view(xpan) + $x]
1297	set _view(ypan) [expr $_view(ypan) + $y]
1298	PanCamera
1299	return
1300	}
1301	"click" {
1302	set _click(x) $x
1303	set _click(y) $y
1304	$itk_component(view) configure -cursor hand1
1305	}
1306	"drag" {
1307	if { ![info exists _click(x)] } {
1308	set _click(x) $x
1309	}
1310	if { ![info exists _click(y)] } {
1311	set _click(y) $y
1312	}
1313	set w [winfo width $itk_component(view)]
1314	set h [winfo height $itk_component(view)]
1315	set dx [expr ($_click(x) - $x)/double($w)]
1316	set dy [expr ($_click(y) - $y)/double($h)]
1317	set _click(x) $x
1318	set _click(y) $y
1319	set _view(xpan) [expr $_view(xpan) - $dx]
1320	set _view(ypan) [expr $_view(ypan) - $dy]
1321	PanCamera
1322	}
1323	"release" {
1324	Pan drag $x $y
1325	$itk_component(view) configure -cursor ""
1326	}
1327	default {
1328	error "unknown option \"$option\": should set, click, drag, or release"
1329	}
1330	}
1331	}
1332
1333	# ----------------------------------------------------------------------
1334	# USAGE: InitSettings <what> ?<value>?
1335	#
1336	# Used internally to update rendering settings whenever parameters
1337	# change in the popup settings panel. Sends the new settings off
1338	# to the back end.
1339	# ----------------------------------------------------------------------
1340	itcl::body Rappture::VtkVolumeViewer::InitSettings { args } {
1341	foreach spec $args {
1342	if { [info exists _settings($_first-$spec)] } {
1343	# Reset global setting with dataobj specific setting
1344	set _settings($spec) $_settings($_first-$spec)
1345	}
1346	AdjustSetting $spec
1347	}
1348	}
1349
1350	#
1351	# AdjustSetting --
1352	#
1353	# Changes/updates a specific setting in the widget. There are
1354	# usually user-setable option. Commands are sent to the render
1355	# server.
1356	#
1357	itcl::body Rappture::VtkVolumeViewer::AdjustSetting {what {value ""}} {
1358	if { ![isconnected] } {
1359	if { $_reset } {
1360	# Just reconnect if we've been reset.
1361	Connect
1362	}
1363	return
1364	}
1365	switch -- $what {
1366	"volumeVisible" {
1367	set bool $_settings(volumeVisible)
1368	set _settings($_current-volumeVisible) $bool
1369	foreach tag [GetDatasetsWithComponent $_current] {
1370	SendCmd "volume visible $bool $tag"
1371	}
1372	if { $bool } {
1373	Rappture::Tooltip::for $itk_component(volume) \
1374	"Hide the volume"
1375	} else {
1376	Rappture::Tooltip::for $itk_component(volume) \
1377	"Show the volume"
1378	}
1379	}
1380	"volumeBlendMode" {
1381	set val [$itk_component(blendmode) value]
1382	set mode [$itk_component(blendmode) translate $val]
1383	set _settings(volumeBlendMode) $mode
1384	set _settings($_current-volumeBlendMode) $mode
1385	foreach tag [GetDatasetsWithComponent $_current] {
1386	SendCmd "volume blendmode $mode $tag"
1387	}
1388	}
1389	"volumeAmbient" {
1390	set val $_settings(volumeAmbient)
1391	set _settings($_current-volumeAmbient) $val
1392	set ambient [expr {0.01*$val}]
1393	foreach tag [GetDatasetsWithComponent $_current] {
1394	SendCmd "volume shading ambient $ambient $tag"
1395	}
1396	}
1397	"volumeDiffuse" {
1398	set val $_settings(volumeDiffuse)
1399	set _settings($_current-volumeDiffuse) $val
1400	set diffuse [expr {0.01*$val}]
1401	foreach tag [GetDatasetsWithComponent $_current] {
1402	SendCmd "volume shading diffuse $diffuse $tag"
1403	}
1404	}
1405	"volumeSpecularLevel" - "volumeSpecularExponent" {
1406	set val $_settings(volumeSpecularLevel)
1407	set _settings($_current-volumeSpecularLevel) $val
1408	set level [expr {0.01*$val}]
1409	set exp $_settings(volumeSpecularExponent)
1410	foreach tag [GetDatasetsWithComponent $_current] {
1411	SendCmd "volume shading specular $level $exp $tag"
1412	}
1413	}
1414	"volumeLighting" {
1415	set bool $_settings(volumeLighting)
1416	set _settings($_current-volumeLighting) $bool
1417	foreach tag [GetDatasetsWithComponent $_current] {
1418	SendCmd "volume lighting $bool $tag"
1419	}
1420	}
1421	"volumeOpacity" {
1422	set val $_settings(volumeOpacity)
1423	set _settings($_current-volumeOpacity) $val
1424	set val [expr {0.01*$val}]
1425	foreach tag [GetDatasetsWithComponent $_current] {
1426	SendCmd "volume opacity $val $tag"
1427	}
1428	}
1429	"volumeQuality" {
1430	set val $_settings(volumeQuality)
1431	set _settings($_current-volumeQuality) $val
1432	set val [expr {0.01*$val}]
1433	foreach tag [GetDatasetsWithComponent $_current] {
1434	SendCmd "volume quality $val $tag"
1435	}
1436	}
1437	"axesVisible" {
1438	set bool $_settings(axesVisible)
1439	SendCmd "axis visible all $bool"
1440	}
1441	"axisLabels" {
1442	set bool $_settings(axisLabels)
1443	SendCmd "axis labels all $bool"
1444	}
1445	"axisGridX" - "axisGridY" - "axisGridZ" {
1446	set axis [string tolower [string range $what end end]]
1447	set bool $_settings($what)
1448	SendCmd "axis grid $axis $bool"
1449	}
1450	"axisFlyMode" {
1451	set mode [$itk_component(axismode) value]
1452	set mode [$itk_component(axismode) translate $mode]
1453	set _settings($what) $mode
1454	SendCmd "axis flymode $mode"
1455	}
1456	"cutplaneEdges" {
1457	set bool $_settings($what)
1458	foreach dataset [CurrentDatasets -visible] {
1459	SendCmd "cutplane edges $bool $dataset"
1460	}
1461	}
1462	"cutplaneVisible" {
1463	set bool $_settings($what)
1464	foreach dataset [CurrentDatasets -visible] {
1465	SendCmd "cutplane visible $bool $dataset"
1466	}
1467	}
1468	"cutplaneWireframe" {
1469	set bool $_settings($what)
1470	foreach dataset [CurrentDatasets -visible] {
1471	SendCmd "cutplane wireframe $bool $dataset"
1472	}
1473	}
1474	"cutplaneLighting" {
1475	set bool $_settings($what)
1476	foreach dataset [CurrentDatasets -visible] {
1477	SendCmd "cutplane lighting $bool $dataset"
1478	}
1479	}
1480	"cutplaneOpacity" {
1481	set val $_settings($what)
1482	set sval [expr { 0.01 * double($val) }]
1483	foreach dataset [CurrentDatasets -visible] {
1484	SendCmd "cutplane opacity $sval $dataset"
1485	}
1486	}
1487	"cutplaneVisibleX" - "cutplaneVisibleY" - "cutplaneVisibleZ" {
1488	set axis [string tolower [string range $what end end]]
1489	set bool $_settings($what)
1490	if { $bool } {
1491	$itk_component(${axis}CutScale) configure -state normal \
1492	-troughcolor white
1493	} else {
1494	$itk_component(${axis}CutScale) configure -state disabled \
1495	-troughcolor grey82
1496	}
1497	foreach dataset [CurrentDatasets -visible] {
1498	SendCmd "cutplane axis $axis $bool $dataset"
1499	}
1500	}
1501	"cutplanePositionX" - "cutplanePositionY" - "cutplanePositionZ" {
1502	set axis [string tolower [string range $what end end]]
1503	set pos [expr $_settings($what) * 0.01]
1504	foreach dataset [CurrentDatasets -visible] {
1505	SendCmd "cutplane slice ${axis} ${pos} $dataset"
1506	}
1507	set _cutplanePending 0
1508	}
1509	"thickness" {
1510	set val $_settings($this-thickness)
1511	set _settings($_current-thickness) $val
1512	updateTransferFunctions
1513	}
1514	"volumeColormap" {
1515	set color [$itk_component(colormap) value]
1516	set _settings($this-colormap) $color
1517	set _settings($_current-colormap) $color
1518	ResetColormap $_current $color
1519	set _legendPending 1
1520	}
1521	"field" {
1522	set label [$itk_component(field) value]
1523	set fname [$itk_component(field) translate $label]
1524	set _settings(field) $fname
1525	if { [info exists _fields($fname)] } {
1526	foreach { label units components } $_fields($fname) break
1527	if { $components > 1 } {
1528	puts stderr "Can't use a vector field in a volume"
1529	return
1530	} else {
1531	set _colorMode scalar
1532	}
1533	set _curFldName $fname
1534	set _curFldLabel $label
1535	} else {
1536	puts stderr "unknown field \"$fname\""
1537	return
1538	}
1539	foreach dataset [CurrentDatasets -visible $_first] {
1540	#SendCmd "volume colormode $_colorMode ${fname} $dataset"
1541	SendCmd "cutplane colormode $_colorMode ${fname} $dataset"
1542	}
1543	SendCmd "camera reset"
1544	DrawLegend
1545	}
1546	default {
1547	error "don't know how to fix $what"
1548	}
1549	}
1550	}
1551
1552	#
1553	# RequestLegend --
1554	#
1555	# Request a new legend from the server. The size of the legend
1556	# is determined from the height of the canvas. It will be rotated
1557	# to be vertical when drawn.
1558	#
1559	itcl::body Rappture::VtkVolumeViewer::RequestLegend {} {
1560	set font "Arial 8"
1561	set lineht [font metrics $itk_option(-font) -linespace]
1562	set c $itk_component(legend)
1563	set w [winfo width $c]
1564	set h [winfo height $c]
1565	set h [expr {$h-$lineht-20}]
1566	set w [expr {$w-20}]
1567	# Set the legend on the first volume dataset.
1568	foreach dataset [CurrentDatasets -visible $_first] {
1569	foreach {dataobj comp} [split $dataset -] break
1570	if { [info exists _dataset2style($dataset)] } {
1571	SendCmdNoWait \
1572	"legend $_dataset2style($dataset) $_colorMode $_curFldName {} $w $h 0"
1573	break;
1574	}
1575	}
1576	}
1577
1578	# ----------------------------------------------------------------------
1579	# CONFIGURATION OPTION: -plotbackground
1580	# ----------------------------------------------------------------------
1581	itcl::configbody Rappture::VtkVolumeViewer::plotbackground {
1582	if { [isconnected] } {
1583	foreach {r g b} [Color2RGB $itk_option(-plotbackground)] break
1584	SendCmd "screen bgcolor $r $g $b"
1585	}
1586	}
1587
1588	# ----------------------------------------------------------------------
1589	# CONFIGURATION OPTION: -plotforeground
1590	# ----------------------------------------------------------------------
1591	itcl::configbody Rappture::VtkVolumeViewer::plotforeground {
1592	if { [isconnected] } {
1593	foreach {r g b} [Color2RGB $itk_option(-plotforeground)] break
1594	#fix this!
1595	#SendCmd "color background $r $g $b"
1596	}
1597	}
1598
1599	itcl::body Rappture::VtkVolumeViewer::BuildVolumeTab {} {
1600	set font [option get $itk_component(hull) font Font]
1601	#set bfont [option get $itk_component(hull) boldFont Font]
1602
1603	set inner [$itk_component(main) insert end \
1604	-title "Volume Settings" \
1605	-icon [Rappture::icon volume-on]]
1606	$inner configure -borderwidth 4
1607
1608	label $inner.volcomponents_l -text "Component" -font $font
1609	itk_component add volcomponents {
1610	Rappture::Combobox $inner.volcomponents -editable no
1611	}
1612	$itk_component(volcomponents) value "BCGYR"
1613	bind $inner.volcomponents <<Value>> \
1614	[itcl::code $this AdjustSetting current]
1615
1616	checkbutton $inner.visibility \
1617	-text "Visible" \
1618	-font $font \
1619	-variable [itcl::scope _settings(volumeVisible)] \
1620	-command [itcl::code $this AdjustSetting volumeVisible]
1621
1622	label $inner.lighting_l \
1623	-text "Lighting / Material Properties" \
1624	-font "Arial 9 bold"
1625
1626	checkbutton $inner.lighting \
1627	-text "Enable Lighting" \
1628	-font $font \
1629	-variable [itcl::scope _settings(volumeLighting)] \
1630	-command [itcl::code $this AdjustSetting volumeLighting]
1631
1632	label $inner.ambient_l \
1633	-text "Ambient" \
1634	-font $font
1635	::scale $inner.ambient -from 0 -to 100 -orient horizontal \
1636	-variable [itcl::scope _settings(volumeAmbient)] \
1637	-showvalue off -command [itcl::code $this AdjustSetting volumeAmbient] \
1638	-troughcolor grey92
1639
1640	label $inner.diffuse_l -text "Diffuse" -font $font
1641	::scale $inner.diffuse -from 0 -to 100 -orient horizontal \
1642	-variable [itcl::scope _settings(volumeDiffuse)] \
1643	-showvalue off -command [itcl::code $this AdjustSetting volumeDiffuse] \
1644	-troughcolor grey92
1645
1646	label $inner.specularLevel_l -text "Specular" -font $font
1647	::scale $inner.specularLevel -from 0 -to 100 -orient horizontal \
1648	-variable [itcl::scope _settings(volumeSpecularLevel)] \
1649	-showvalue off -command [itcl::code $this AdjustSetting volumeSpecularLevel] \
1650	-troughcolor grey92
1651
1652	label $inner.specularExponent_l -text "Shininess" -font $font
1653	::scale $inner.specularExponent -from 10 -to 128 -orient horizontal \
1654	-variable [itcl::scope _settings(volumeSpecularExponent)] \
1655	-showvalue off -command [itcl::code $this AdjustSetting volumeSpecularExponent] \
1656	-troughcolor grey92
1657
1658	label $inner.opacity_l -text "Opacity" -font $font
1659	::scale $inner.opacity -from 0 -to 100 -orient horizontal \
1660	-variable [itcl::scope _settings(volumeOpacity)] \
1661	-showvalue off -command [itcl::code $this AdjustSetting volumeOpacity] \
1662	-troughcolor grey92
1663
1664	label $inner.quality_l -text "Quality" -font $font
1665	::scale $inner.quality -from 0 -to 100 -orient horizontal \
1666	-variable [itcl::scope _settings(volumeQuality)] \
1667	-showvalue off -command [itcl::code $this AdjustSetting volumeQuality] \
1668	-troughcolor grey92
1669
1670	label $inner.field_l -text "Field" -font $font
1671	itk_component add field {
1672	Rappture::Combobox $inner.field -editable no
1673	}
1674	bind $inner.field <<Value>> \
1675	[itcl::code $this AdjustSetting field]
1676
1677	label $inner.transferfunction_l \
1678	-text "Transfer Function" -font "Arial 9 bold"
1679
1680	label $inner.thin -text "Thin" -font $font
1681	::scale $inner.thickness -from 0 -to 1000 -orient horizontal \
1682	-variable [itcl::scope _settings($this-thickness)] \
1683	-showvalue off -command [itcl::code $this AdjustSetting thickness] \
1684	-troughcolor grey92
1685
1686	label $inner.thick -text "Thick" -font $font
1687
1688
1689	label $inner.colormap_l -text "Colormap" -font $font
1690	itk_component add colormap {
1691	Rappture::Combobox $inner.colormap -width 10 -editable no
1692	}
1693	$inner.colormap choices insert end \
1694	"BCGYR" "BCGYR" \
1695	"BGYOR" "BGYOR" \
1696	"blue" "blue" \
1697	"blue-to-brown" "blue-to-brown" \
1698	"blue-to-orange" "blue-to-orange" \
1699	"blue-to-grey" "blue-to-grey" \
1700	"green-to-magenta" "green-to-magenta" \
1701	"greyscale" "greyscale" \
1702	"nanohub" "nanohub" \
1703	"rainbow" "rainbow" \
1704	"spectral" "spectral" \
1705	"ROYGB" "ROYGB" \
1706	"RYGCB" "RYGCB" \
1707	"brown-to-blue" "brown-to-blue" \
1708	"grey-to-blue" "grey-to-blue" \
1709	"orange-to-blue" "orange-to-blue"
1710
1711	$itk_component(colormap) value "BCGYR"
1712	bind $inner.colormap <<Value>> \
1713	[itcl::code $this AdjustSetting volumeColormap]
1714
1715	label $inner.blendmode_l -text "Blend Mode" -font $font
1716	itk_component add blendmode {
1717	Rappture::Combobox $inner.blendmode -editable no
1718	}
1719	$inner.blendmode choices insert end \
1720	"composite" "Composite" \
1721	"max_intensity" "Maximum Intensity" \
1722	"additive" "Additive"
1723
1724	$itk_component(blendmode) value "composite"
1725	bind $inner.blendmode <<Value>> \
1726	[itcl::code $this AdjustSetting volumeBlendMode]
1727
1728	blt::table $inner \
1729	0,0 $inner.volcomponents_l -anchor e -cspan 2 \
1730	0,2 $inner.volcomponents -cspan 3 -fill x \
1731	1,0 $inner.field_l -anchor e -cspan 2 \
1732	1,2 $inner.field -cspan 3 -fill x \
1733	2,0 $inner.lighting_l -anchor w -cspan 4 \
1734	3,1 $inner.lighting -anchor w -cspan 3 \
1735	4,1 $inner.ambient_l -anchor e -pady 2 \
1736	4,2 $inner.ambient -cspan 3 -fill x \
1737	5,1 $inner.diffuse_l -anchor e -pady 2 \
1738	5,2 $inner.diffuse -cspan 3 -fill x \
1739	6,1 $inner.specularLevel_l -anchor e -pady 2 \
1740	6,2 $inner.specularLevel -cspan 3 -fill x \
1741	7,1 $inner.specularExponent_l -anchor e -pady 2 \
1742	7,2 $inner.specularExponent -cspan 3 -fill x \
1743	8,1 $inner.visibility -anchor w -cspan 3 \
1744	9,1 $inner.quality_l -anchor e -pady 2 \
1745	9,2 $inner.quality -cspan 3 -fill x \
1746	10,0 $inner.transferfunction_l -anchor w -cspan 4 \
1747	11,1 $inner.opacity_l -anchor e -pady 2 \
1748	11,2 $inner.opacity -cspan 3 -fill x \
1749	12,1 $inner.colormap_l -anchor e \
1750	12,2 $inner.colormap -padx 2 -cspan 3 -fill x \
1751	13,1 $inner.blendmode_l -anchor e \
1752	13,2 $inner.blendmode -padx 2 -cspan 3 -fill x \
1753	14,1 $inner.thin -anchor e \
1754	14,2 $inner.thickness -cspan 2 -fill x \
1755	14,4 $inner.thick -anchor w
1756
1757	blt::table configure $inner r* c* -resize none
1758	blt::table configure $inner r* -pady { 2 0 }
1759	blt::table configure $inner c2 c3 r15 -resize expand
1760	blt::table configure $inner c0 -width .1i
1761	}
1762
1763	itcl::body Rappture::VtkVolumeViewer::BuildAxisTab {} {
1764
1765	set fg [option get $itk_component(hull) font Font]
1766	#set bfg [option get $itk_component(hull) boldFont Font]
1767
1768	set inner [$itk_component(main) insert end \
1769	-title "Axis Settings" \
1770	-icon [Rappture::icon axis1]]
1771	$inner configure -borderwidth 4
1772
1773	checkbutton $inner.visible \
1774	-text "Show Axes" \
1775	-variable [itcl::scope _settings(axesVisible)] \
1776	-command [itcl::code $this AdjustSetting axesVisible] \
1777	-font "Arial 9"
1778
1779	checkbutton $inner.labels \
1780	-text "Show Axis Labels" \
1781	-variable [itcl::scope _settings(axisLabels)] \
1782	-command [itcl::code $this AdjustSetting axisLabels] \
1783	-font "Arial 9"
1784
1785	checkbutton $inner.gridx \
1786	-text "Show X Grid" \
1787	-variable [itcl::scope _settings(axisGridX)] \
1788	-command [itcl::code $this AdjustSetting axisGridX] \
1789	-font "Arial 9"
1790	checkbutton $inner.gridy \
1791	-text "Show Y Grid" \
1792	-variable [itcl::scope _settings(axisGridY)] \
1793	-command [itcl::code $this AdjustSetting axisGridY] \
1794	-font "Arial 9"
1795	checkbutton $inner.gridz \
1796	-text "Show Z Grid" \
1797	-variable [itcl::scope _settings(axisGridZ)] \
1798	-command [itcl::code $this AdjustSetting axisGridZ] \
1799	-font "Arial 9"
1800
1801	label $inner.mode_l -text "Mode" -font "Arial 9"
1802
1803	itk_component add axismode {
1804	Rappture::Combobox $inner.mode -width 10 -editable no
1805	}
1806	$inner.mode choices insert end \
1807	"static_triad" "static" \
1808	"closest_triad" "closest" \
1809	"furthest_triad" "farthest" \
1810	"outer_edges" "outer"
1811	$itk_component(axismode) value "static"
1812	bind $inner.mode <<Value>> [itcl::code $this AdjustSetting axisFlyMode]
1813
1814	blt::table $inner \
1815	0,0 $inner.visible -anchor w -cspan 2 \
1816	1,0 $inner.labels -anchor w -cspan 2 \
1817	2,0 $inner.gridx -anchor w -cspan 2 \
1818	3,0 $inner.gridy -anchor w -cspan 2 \
1819	4,0 $inner.gridz -anchor w -cspan 2 \
1820	5,0 $inner.mode_l -anchor w -cspan 2 -padx { 2 0 } \
1821	6,0 $inner.mode -fill x -cspan 2
1822
1823	blt::table configure $inner r* c* -resize none
1824	blt::table configure $inner r7 c1 -resize expand
1825	}
1826
1827
1828	itcl::body Rappture::VtkVolumeViewer::BuildCameraTab {} {
1829	set inner [$itk_component(main) insert end \
1830	-title "Camera Settings" \
1831	-icon [Rappture::icon camera]]
1832	$inner configure -borderwidth 4
1833
1834	label $inner.view_l -text "view" -font "Arial 9"
1835	set f [frame $inner.view]
1836	foreach side { front back left right top bottom } {
1837	button $f.$side -image [Rappture::icon view$side] \
1838	-command [itcl::code $this SetOrientation $side]
1839	Rappture::Tooltip::for $f.$side "Change the view to $side"
1840	pack $f.$side -side left
1841	}
1842	blt::table $inner \
1843	0,0 $inner.view_l -anchor e -pady 2 \
1844	0,1 $inner.view -anchor w -pady 2
1845
1846	set row 1
1847
1848	set labels { qx qy qz qw xpan ypan zoom }
1849	foreach tag $labels {
1850	label $inner.${tag}label -text $tag -font "Arial 9"
1851	entry $inner.${tag} -font "Arial 9" -bg white \
1852	-textvariable [itcl::scope _view($tag)]
1853	bind $inner.${tag} <KeyPress-Return> \
1854	[itcl::code $this camera set ${tag}]
1855	blt::table $inner \
1856	$row,0 $inner.${tag}label -anchor e -pady 2 \
1857	$row,1 $inner.${tag} -anchor w -pady 2
1858	blt::table configure $inner r$row -resize none
1859	incr row
1860	}
1861	checkbutton $inner.ortho \
1862	-text "Orthographic Projection" \
1863	-variable [itcl::scope _view(ortho)] \
1864	-command [itcl::code $this camera set ortho] \
1865	-font "Arial 9"
1866	blt::table $inner \
1867	$row,0 $inner.ortho -cspan 2 -anchor w -pady 2
1868	blt::table configure $inner r$row -resize none
1869	incr row
1870
1871	blt::table configure $inner r* c0 c1 -resize none
1872	blt::table configure $inner c2 -resize expand
1873	blt::table configure $inner r$row -resize expand
1874	}
1875
1876	itcl::body Rappture::VtkVolumeViewer::BuildCutplaneTab {} {
1877
1878	set fg [option get $itk_component(hull) font Font]
1879
1880	set inner [$itk_component(main) insert end \
1881	-title "Cutplane Settings" \
1882	-icon [Rappture::icon cutbutton]]
1883
1884	$inner configure -borderwidth 4
1885
1886	checkbutton $inner.visible \
1887	-text "Show Cutplanes" \
1888	-variable [itcl::scope _settings(cutplaneVisible)] \
1889	-command [itcl::code $this AdjustSetting cutplaneVisible] \
1890	-font "Arial 9"
1891
1892	checkbutton $inner.wireframe \
1893	-text "Show Wireframe" \
1894	-variable [itcl::scope _settings(cutplaneWireframe)] \
1895	-command [itcl::code $this AdjustSetting cutplaneWireframe] \
1896	-font "Arial 9"
1897
1898	checkbutton $inner.lighting \
1899	-text "Enable Lighting" \
1900	-variable [itcl::scope _settings(cutplaneLighting)] \
1901	-command [itcl::code $this AdjustSetting cutplaneLighting] \
1902	-font "Arial 9"
1903
1904	checkbutton $inner.edges \
1905	-text "Show Edges" \
1906	-variable [itcl::scope _settings(cutplaneEdges)] \
1907	-command [itcl::code $this AdjustSetting cutplaneEdges] \
1908	-font "Arial 9"
1909
1910	label $inner.opacity_l -text "Opacity" -font "Arial 9"
1911	::scale $inner.opacity -from 0 -to 100 -orient horizontal \
1912	-variable [itcl::scope _settings(cutplaneOpacity)] \
1913	-width 10 \
1914	-showvalue off \
1915	-command [itcl::code $this AdjustSetting cutplaneOpacity]
1916	$inner.opacity set $_settings(cutplaneOpacity)
1917
1918	# X-value slicer...
1919	itk_component add xCutButton {
1920	Rappture::PushButton $inner.xbutton \
1921	-onimage [Rappture::icon x-cutplane] \
1922	-offimage [Rappture::icon x-cutplane] \
1923	-command [itcl::code $this AdjustSetting cutplaneVisibleX] \
1924	-variable [itcl::scope _settings(cutplaneVisibleX)]
1925	}
1926	Rappture::Tooltip::for $itk_component(xCutButton) \
1927	"Toggle the X-axis cutplane on/off"
1928	$itk_component(xCutButton) select
1929
1930	itk_component add xCutScale {
1931	::scale $inner.xval -from 100 -to 0 \
1932	-width 10 -orient vertical -showvalue yes \
1933	-borderwidth 1 -highlightthickness 0 \
1934	-command [itcl::code $this EventuallySetCutplane x] \
1935	-variable [itcl::scope _settings(cutplanePositionX)]
1936	} {
1937	usual
1938	ignore -borderwidth -highlightthickness
1939	}
1940	# Set the default cutplane value before disabling the scale.
1941	$itk_component(xCutScale) set 50
1942	$itk_component(xCutScale) configure -state disabled
1943	Rappture::Tooltip::for $itk_component(xCutScale) \
1944	"@[itcl::code $this Slice tooltip x]"
1945
1946	# Y-value slicer...
1947	itk_component add yCutButton {
1948	Rappture::PushButton $inner.ybutton \
1949	-onimage [Rappture::icon y-cutplane] \
1950	-offimage [Rappture::icon y-cutplane] \
1951	-command [itcl::code $this AdjustSetting cutplaneVisibleY] \
1952	-variable [itcl::scope _settings(cutplaneVisibleY)]
1953	}
1954	Rappture::Tooltip::for $itk_component(yCutButton) \
1955	"Toggle the Y-axis cutplane on/off"
1956	$itk_component(yCutButton) select
1957
1958	itk_component add yCutScale {
1959	::scale $inner.yval -from 100 -to 0 \
1960	-width 10 -orient vertical -showvalue yes \
1961	-borderwidth 1 -highlightthickness 0 \
1962	-command [itcl::code $this EventuallySetCutplane y] \
1963	-variable [itcl::scope _settings(cutplanePositionY)]
1964	} {
1965	usual
1966	ignore -borderwidth -highlightthickness
1967	}
1968	Rappture::Tooltip::for $itk_component(yCutScale) \
1969	"@[itcl::code $this Slice tooltip y]"
1970	# Set the default cutplane value before disabling the scale.
1971	$itk_component(yCutScale) set 50
1972	$itk_component(yCutScale) configure -state disabled
1973
1974	# Z-value slicer...
1975	itk_component add zCutButton {
1976	Rappture::PushButton $inner.zbutton \
1977	-onimage [Rappture::icon z-cutplane] \
1978	-offimage [Rappture::icon z-cutplane] \
1979	-command [itcl::code $this AdjustSetting cutplaneVisibleZ] \
1980	-variable [itcl::scope _settings(cutplaneVisibleZ)]
1981	}
1982	Rappture::Tooltip::for $itk_component(zCutButton) \
1983	"Toggle the Z-axis cutplane on/off"
1984	$itk_component(zCutButton) select
1985
1986	itk_component add zCutScale {
1987	::scale $inner.zval -from 100 -to 0 \
1988	-width 10 -orient vertical -showvalue yes \
1989	-borderwidth 1 -highlightthickness 0 \
1990	-command [itcl::code $this EventuallySetCutplane z] \
1991	-variable [itcl::scope _settings(cutplanePositionZ)]
1992	} {
1993	usual
1994	ignore -borderwidth -highlightthickness
1995	}
1996	$itk_component(zCutScale) set 50
1997	$itk_component(zCutScale) configure -state disabled
1998	Rappture::Tooltip::for $itk_component(zCutScale) \
1999	"@[itcl::code $this Slice tooltip z]"
2000
2001	blt::table $inner \
2002	0,0 $inner.visible -anchor w -pady 2 -cspan 4 \
2003	1,0 $inner.lighting -anchor w -pady 2 -cspan 4 \
2004	2,0 $inner.wireframe -anchor w -pady 2 -cspan 4 \
2005	3,0 $inner.edges -anchor w -pady 2 -cspan 4 \
2006	4,0 $inner.opacity_l -anchor w -pady 2 -cspan 3 \
2007	5,0 $inner.opacity -fill x -pady 2 -cspan 3 \
2008	6,0 $itk_component(xCutButton) -anchor e -padx 2 -pady 2 \
2009	7,0 $itk_component(xCutScale) -fill y \
2010	6,1 $itk_component(yCutButton) -anchor e -padx 2 -pady 2 \
2011	7,1 $itk_component(yCutScale) -fill y \
2012	6,2 $itk_component(zCutButton) -anchor e -padx 2 -pady 2 \
2013	7,2 $itk_component(zCutScale) -fill y \
2014
2015	blt::table configure $inner r* c* -resize none
2016	blt::table configure $inner r7 c3 -resize expand
2017	}
2018
2019	#
2020	# camera --
2021	#
2022	itcl::body Rappture::VtkVolumeViewer::camera {option args} {
2023	switch -- $option {
2024	"show" {
2025	puts [array get _view]
2026	}
2027	"set" {
2028	set who [lindex $args 0]
2029	set x $_view($who)
2030	set code [catch { string is double $x } result]
2031	if { $code != 0 \|\| !$result } {
2032	return
2033	}
2034	switch -- $who {
2035	"ortho" {
2036	if {$_view(ortho)} {
2037	SendCmd "camera mode ortho"
2038	} else {
2039	SendCmd "camera mode persp"
2040	}
2041	}
2042	"xpan" - "ypan" {
2043	PanCamera
2044	}
2045	"qx" - "qy" - "qz" - "qw" {
2046	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
2047	$_arcball quaternion $q
2048	EventuallyRotate $q
2049	}
2050	"zoom" {
2051	SendCmd "camera zoom $_view(zoom)"
2052	}
2053	}
2054	}
2055	}
2056	}
2057
2058	itcl::body Rappture::VtkVolumeViewer::GetVtkData { args } {
2059	set bytes ""
2060	foreach dataobj [get] {
2061	foreach comp [$dataobj components] {
2062	set tag $dataobj-$comp
2063	set contents [$dataobj vtkdata $comp]
2064	append bytes "$contents\n"
2065	}
2066	}
2067	return [list .vtk $bytes]
2068	}
2069
2070	itcl::body Rappture::VtkVolumeViewer::GetImage { args } {
2071	if { [image width $_image(download)] > 0 &&
2072	[image height $_image(download)] > 0 } {
2073	set bytes [$_image(download) data -format "jpeg -quality 100"]
2074	set bytes [Rappture::encoding::decode -as b64 $bytes]
2075	return [list .jpg $bytes]
2076	}
2077	return ""
2078	}
2079
2080	itcl::body Rappture::VtkVolumeViewer::BuildDownloadPopup { popup command } {
2081	Rappture::Balloon $popup \
2082	-title "[Rappture::filexfer::label downloadWord] as..."
2083	set inner [$popup component inner]
2084	label $inner.summary -text "" -anchor w
2085	radiobutton $inner.vtk_button -text "VTK data file" \
2086	-variable [itcl::scope _downloadPopup(format)] \
2087	-font "Helvetica 9 " \
2088	-value vtk
2089	Rappture::Tooltip::for $inner.vtk_button "Save as VTK data file."
2090	radiobutton $inner.image_button -text "Image File" \
2091	-variable [itcl::scope _downloadPopup(format)] \
2092	-value image
2093	Rappture::Tooltip::for $inner.image_button \
2094	"Save as digital image."
2095
2096	button $inner.ok -text "Save" \
2097	-highlightthickness 0 -pady 2 -padx 3 \
2098	-command $command \
2099	-compound left \
2100	-image [Rappture::icon download]
2101
2102	button $inner.cancel -text "Cancel" \
2103	-highlightthickness 0 -pady 2 -padx 3 \
2104	-command [list $popup deactivate] \
2105	-compound left \
2106	-image [Rappture::icon cancel]
2107
2108	blt::table $inner \
2109	0,0 $inner.summary -cspan 2 \
2110	1,0 $inner.vtk_button -anchor w -cspan 2 -padx { 4 0 } \
2111	2,0 $inner.image_button -anchor w -cspan 2 -padx { 4 0 } \
2112	4,1 $inner.cancel -width .9i -fill y \
2113	4,0 $inner.ok -padx 2 -width .9i -fill y
2114	blt::table configure $inner r3 -height 4
2115	blt::table configure $inner r4 -pady 4
2116	raise $inner.image_button
2117	$inner.vtk_button invoke
2118	return $inner
2119	}
2120
2121	itcl::body Rappture::VtkVolumeViewer::SetObjectStyle { dataobj cname } {
2122	# Parse style string.
2123	set tag $dataobj-$cname
2124	set style [$dataobj style $cname]
2125	array set settings {
2126	-color \#808080
2127	-edges 0
2128	-edgecolor black
2129	-linewidth 1.0
2130	-opacity 0.4
2131	-wireframe 0
2132	-lighting 1
2133	-seeds 1
2134	-seedcolor white
2135	-visible 1
2136	}
2137	if { $dataobj != $_first } {
2138	set settings(-opacity) 1
2139	}
2140	array set settings $style
2141	SendCmd "volume add $tag"
2142	SendCmd "cutplane add $tag"
2143	SendCmd "cutplane visible 0 $tag"
2144	SendCmd "volume lighting $settings(-lighting) $tag"
2145	set _settings(volumeLighting) $settings(-lighting)
2146	SetInitialTransferFunction $dataobj $cname
2147	SendCmd "volume colormap $cname $tag"
2148	SendCmd "cutplane colormap $cname-opaque $tag"
2149	}
2150
2151	itcl::body Rappture::VtkVolumeViewer::IsValidObject { dataobj } {
2152	if {[catch {$dataobj isa Rappture::Field} valid] != 0 \|\| !$valid} {
2153	return 0
2154	}
2155	return 1
2156	}
2157
2158	# ----------------------------------------------------------------------
2159	# USAGE: ReceiveLegend <colormap> <title> <vmin> <vmax> <size>
2160	#
2161	# Invoked automatically whenever the "legend" command comes in from
2162	# the rendering server. Indicates that binary image data with the
2163	# specified <size> will follow.
2164	# ----------------------------------------------------------------------
2165	itcl::body Rappture::VtkVolumeViewer::ReceiveLegend { colormap title vmin vmax size } {
2166	set _legendPending 0
2167	if { [isconnected] } {
2168	set bytes [ReceiveBytes $size]
2169	if { ![info exists _image(legend)] } {
2170	set _image(legend) [image create photo]
2171	}
2172	$_image(legend) configure -data $bytes
2173	#puts stderr "read $size bytes for [image width $_image(legend)]x[image height $_image(legend)] legend>"
2174	if { [catch {DrawLegend} errs] != 0 } {
2175	puts stderr errs=$errs
2176	}
2177	}
2178	}
2179
2180	#
2181	# DrawLegend --
2182	#
2183	itcl::body Rappture::VtkVolumeViewer::DrawLegend {} {
2184	if { $_current == "" } {
2185	set _current "component"
2186	}
2187	set cname $_current
2188	set c $itk_component(legend)
2189	set w [winfo width $c]
2190	set h [winfo height $c]
2191	set lx 10
2192	set ly [expr {$h - 1}]
2193	if {"" == [$c find withtag transfunc]} {
2194	$c create image 10 10 -anchor nw \
2195	-image $_image(legend) -tags transfunc
2196	$c create text $lx $ly -anchor sw \
2197	-fill $itk_option(-plotforeground) -tags "limits text vmin"
2198	$c create text [expr {$w-$lx}] $ly -anchor se \
2199	-fill $itk_option(-plotforeground) -tags "limits text vmax"
2200	$c create text [expr {$w/2}] $ly -anchor s \
2201	-fill $itk_option(-plotforeground) -tags "limits text title"
2202	$c lower transfunc
2203	}
2204
2205	# Display the markers used by the current transfer function.
2206	HideAllMarkers
2207	if { [info exists _transferFunctionEditors($cname)] } {
2208	$_transferFunctionEditors($cname) showMarkers $_limits($cname)
2209	}
2210
2211	foreach {min max} $_limits($cname) break
2212	$c itemconfigure vmin -text [format %.2g $min]
2213	$c coords vmin $lx $ly
2214
2215	$c itemconfigure vmax -text [format %.2g $max]
2216	$c coords vmax [expr {$w-$lx}] $ly
2217
2218	set title ""
2219	if { $_first != "" } {
2220	set title [$_first hints label]
2221	set units [$_first hints units]
2222	if { $units != "" } {
2223	set title "$title ($units)"
2224	}
2225	}
2226	$c itemconfigure title -text $title
2227	$c coords title [expr {$w/2}] $ly
2228	}
2229
2230	#
2231	# DrawLegendOld --
2232	#
2233	# Draws the legend in it's own canvas which resides to the right
2234	# of the contour plot area.
2235	#
2236	itcl::body Rappture::VtkVolumeViewer::DrawLegendOld { } {
2237	set fname $_curFldName
2238	set c $itk_component(view)
2239	set w [winfo width $c]
2240	set h [winfo height $c]
2241	set font "Arial 8"
2242	set lineht [font metrics $font -linespace]
2243
2244	if { [info exists _fields($fname)] } {
2245	foreach { title units } $_fields($fname) break
2246	if { $units != "" } {
2247	set title [format "%s (%s)" $title $units]
2248	}
2249	} else {
2250	set title $fname
2251	}
2252	if { $_settings(legendVisible) } {
2253	set x [expr $w - 2]
2254	if { [$c find withtag "legend"] == "" } {
2255	set y 2
2256	$c create text $x $y \
2257	-anchor ne \
2258	-fill $itk_option(-plotforeground) -tags "title legend" \
2259	-font $font
2260	incr y $lineht
2261	$c create text $x $y \
2262	-anchor ne \
2263	-fill $itk_option(-plotforeground) -tags "vmax legend" \
2264	-font $font
2265	incr y $lineht
2266	$c create image $x $y \
2267	-anchor ne \
2268	-image $_image(legend) -tags "colormap legend"
2269	$c create text $x [expr {$h-2}] \
2270	-anchor se \
2271	-fill $itk_option(-plotforeground) -tags "vmin legend" \
2272	-font $font
2273	#$c bind colormap <Enter> [itcl::code $this EnterLegend %x %y]
2274	$c bind colormap <Leave> [itcl::code $this LeaveLegend]
2275	$c bind colormap <Motion> [itcl::code $this MotionLegend %x %y]
2276	}
2277	$c bind title <ButtonPress> [itcl::code $this Combo post]
2278	$c bind title <Enter> [itcl::code $this Combo activate]
2279	$c bind title <Leave> [itcl::code $this Combo deactivate]
2280	# Reset the item coordinates according the current size of the plot.
2281	$c itemconfigure title -text $title
2282	if { [info exists _limits($_curFldName)] } {
2283	foreach { vmin vmax } $_limits($_curFldName) break
2284	$c itemconfigure vmin -text [format %g $vmin]
2285	$c itemconfigure vmax -text [format %g $vmax]
2286	}
2287	set y 2
2288	$c coords title $x $y
2289	incr y $lineht
2290	$c coords vmax $x $y
2291	incr y $lineht
2292	$c coords colormap $x $y
2293	$c coords vmin $x [expr {$h - 2}]
2294	}
2295	}
2296
2297	#
2298	# EnterLegend --
2299	#
2300	itcl::body Rappture::VtkVolumeViewer::EnterLegend { x y } {
2301	SetLegendTip $x $y
2302	}
2303
2304	#
2305	# MotionLegend --
2306	#
2307	itcl::body Rappture::VtkVolumeViewer::MotionLegend { x y } {
2308	Rappture::Tooltip::tooltip cancel
2309	set c $itk_component(view)
2310	SetLegendTip $x $y
2311	}
2312
2313	#
2314	# LeaveLegend --
2315	#
2316	itcl::body Rappture::VtkVolumeViewer::LeaveLegend { } {
2317	Rappture::Tooltip::tooltip cancel
2318	.rappturetooltip configure -icon ""
2319	}
2320
2321	#
2322	# SetLegendTip --
2323	#
2324	itcl::body Rappture::VtkVolumeViewer::SetLegendTip { x y } {
2325	set c $itk_component(view)
2326	set w [winfo width $c]
2327	set h [winfo height $c]
2328	set font "Arial 8"
2329	set lineht [font metrics $font -linespace]
2330
2331	set imgHeight [image height $_image(legend)]
2332	set coords [$c coords colormap]
2333	set imgX [expr $w - [image width $_image(legend)] - 2]
2334	set imgY [expr $y - 2 * ($lineht + 2)]
2335
2336	if { [info exists _fields($_title)] } {
2337	foreach { title units } $_fields($_title) break
2338	if { $units != "" } {
2339	set title [format "%s (%s)" $title $units]
2340	}
2341	} else {
2342	set title $_title
2343	}
2344	# Make a swatch of the selected color
2345	if { [catch { $_image(legend) get 10 $imgY } pixel] != 0 } {
2346	#puts stderr "out of range: $imgY"
2347	return
2348	}
2349	if { ![info exists _image(swatch)] } {
2350	set _image(swatch) [image create photo -width 24 -height 24]
2351	}
2352	set color [eval format "\#%02x%02x%02x" $pixel]
2353	$_image(swatch) put black -to 0 0 23 23
2354	$_image(swatch) put $color -to 1 1 22 22
2355	.rappturetooltip configure -icon $_image(swatch)
2356
2357	# Compute the value of the point
2358	if { [info exists _limits($_curFldName)] } {
2359	foreach { vmin vmax } $_limits($_curFldName) break
2360	set t [expr 1.0 - (double($imgY) / double($imgHeight-1))]
2361	set value [expr $t * ($vmax - $vmin) + $vmin]
2362	} else {
2363	set value 0.0
2364	}
2365	set tipx [expr $x + 15]
2366	set tipy [expr $y - 5]
2367	Rappture::Tooltip::text $c "$title $value"
2368	Rappture::Tooltip::tooltip show $c +$tipx,+$tipy
2369	}
2370
2371
2372	# ----------------------------------------------------------------------
2373	# USAGE: Slice move x\|y\|z <newval>
2374	#
2375	# Called automatically when the user drags the slider to move the
2376	# cut plane that slices 3D data. Gets the current value from the
2377	# slider and moves the cut plane to the appropriate point in the
2378	# data set.
2379	# ----------------------------------------------------------------------
2380	itcl::body Rappture::VtkVolumeViewer::Slice {option args} {
2381	switch -- $option {
2382	"move" {
2383	set axis [lindex $args 0]
2384	set newval [lindex $args 1]
2385	if {[llength $args] != 2} {
2386	error "wrong # args: should be \"Slice move x\|y\|z newval\""
2387	}
2388	set newpos [expr {0.01*$newval}]
2389	SendCmd "cutplane slice $axis $newpos"
2390	}
2391	"tooltip" {
2392	set axis [lindex $args 0]
2393	set val [$itk_component(${axis}CutScale) get]
2394	return "Move the [string toupper $axis] cut plane.\nCurrently: $axis = $val%"
2395	}
2396	default {
2397	error "bad option \"$option\": should be axis, move, or tooltip"
2398	}
2399	}
2400	}
2401
2402
2403	# ----------------------------------------------------------------------
2404	# USAGE: _dropdown post
2405	# USAGE: _dropdown unpost
2406	# USAGE: _dropdown select
2407	#
2408	# Used internally to handle the dropdown list for this combobox. The
2409	# post/unpost options are invoked when the list is posted or unposted
2410	# to manage the relief of the controlling button. The select option
2411	# is invoked whenever there is a selection from the list, to assign
2412	# the value back to the gauge.
2413	# ----------------------------------------------------------------------
2414	itcl::body Rappture::VtkVolumeViewer::Combo {option} {
2415	set c $itk_component(view)
2416	switch -- $option {
2417	post {
2418	foreach { x1 y1 x2 y2 } [$c bbox title] break
2419	set x1 [expr [winfo width $itk_component(view)] - [winfo reqwidth $itk_component(fieldmenu)]]
2420	set x [expr $x1 + [winfo rootx $itk_component(view)]]
2421	set y [expr $y2 + [winfo rooty $itk_component(view)]]
2422	tk_popup $itk_component(fieldmenu) $x $y
2423	}
2424	activate {
2425	$c itemconfigure title -fill red
2426	}
2427	deactivate {
2428	$c itemconfigure title -fill white
2429	}
2430	invoke {
2431	$itk_component(field) value _curFldLabel
2432	AdjustSetting field
2433	}
2434	default {
2435	error "bad option \"$option\": should be post, unpost, select"
2436	}
2437	}
2438	}
2439
2440	#
2441	# The -levels option takes a single value that represents the number
2442	# of evenly distributed markers based on the current data range. Each
2443	# marker is a relative value from 0.0 to 1.0.
2444	#
2445	itcl::body Rappture::VtkVolumeViewer::ParseLevelsOption { cname levels } {
2446	set c $itk_component(legend)
2447	set list {}
2448	regsub -all "," $levels " " levels
2449	if {[string is int $levels]} {
2450	for {set i 1} { $i <= $levels } {incr i} {
2451	lappend list [expr {double($i)/($levels+1)}]
2452	}
2453	} else {
2454	foreach x $levels {
2455	lappend list $x
2456	}
2457	}
2458	set _parsedFunction($cname) 1
2459	$_transferFunctionEditors($cname) addMarkers $list
2460	}
2461
2462	#
2463	# The -markers option takes a list of zero or more values (the values
2464	# may be separated either by spaces or commas) that have the following
2465	# format:
2466	#
2467	# N% Percent of current total data range. Converted to
2468	# to a relative value between 0.0 and 1.0.
2469	# N Absolute value of marker. If the marker is outside of
2470	# the current range, it will be displayed on the outer
2471	# edge of the legends, but it range it represents will
2472	# not be seen.
2473	#
2474	itcl::body Rappture::VtkVolumeViewer::ParseMarkersOption { cname markers } {
2475	set c $itk_component(legend)
2476	set list {}
2477	foreach { min max } $_limits($cname) break
2478	regsub -all "," $markers " " markers
2479	foreach marker $markers {
2480	set n [scan $marker "%g%s" value suffix]
2481	if { $n == 2 && $suffix == "%" } {
2482	# $n% : Set relative value (0..1).
2483	lappend list [expr {$value * 0.01}]
2484	} else {
2485	# $n : absolute value, compute relative
2486	lappend list [expr {(double($value)-$min)/($max-$min)]}
2487	}
2488	}
2489	set _parsedFunction($cname) 1
2490	$_transferFunctionEditors($cname) addMarkers $list
2491	}
2492
2493	#
2494	# SetInitialTransferFunction --
2495	#
2496	# Creates a transfer function name based on the <style> settings in the
2497	# library run.xml file. This placeholder will be used later to create
2498	# and send the actual transfer function once the data info has been sent
2499	# to us by the render server. [We won't know the volume limits until the
2500	# server parses the 3D data and sends back the limits via ReceiveData.]
2501	#
2502	itcl::body Rappture::VtkVolumeViewer::SetInitialTransferFunction { dataobj cname } {
2503	set tag $dataobj-$cname
2504	if { ![info exists _cname2transferFunction($cname)] } {
2505	ComputeTransferFunction $cname
2506	}
2507	set _dataset2style($tag) $cname
2508	lappend _style2datasets($cname) $tag
2509
2510	return $cname
2511	}
2512
2513	#
2514	# ComputeTransferFunction --
2515	#
2516	# Computes and sends the transfer function to the render server. It's
2517	# assumed that the volume data limits are known and that the global
2518	# transfer-functions slider values have been set up. Both parts are
2519	# needed to compute the relative value (location) of the marker, and
2520	# the alpha map of the transfer function.
2521	#
2522	itcl::body Rappture::VtkVolumeViewer::ComputeTransferFunction { cname } {
2523
2524	if { ![info exists _transferFunctionEditors($cname)] } {
2525	set _transferFunctionEditors($cname) \
2526	[Rappture::TransferFunctionEditor ::\#auto $itk_component(legend) \
2527	$cname \
2528	-command [itcl::code $this updateTransferFunctions]]
2529	}
2530
2531	# We have to parse the style attributes for a volume using this
2532	# transfer-function once. This sets up the initial isomarkers for the
2533	# transfer function. The user may add/delete markers, so we have to
2534	# maintain a list of markers for each transfer-function. We use the one
2535	# of the volumes (the first in the list) using the transfer-function as a
2536	# reference.
2537
2538	if { ![info exists _parsedFunction($cname)] \|\| ![info exists _cname2transferFunction($cname)] } {
2539	array set style {
2540	-color BCGYR
2541	-levels 6
2542	-opacity 1.0
2543	-markers ""
2544	}
2545
2546	# Accumulate the style from all the datasets using it.
2547	foreach tag [GetDatasetsWithComponent $cname] {
2548	foreach {dataobj cname} [split [lindex $tag 0] -] break
2549	array set style [lindex [$dataobj components -style $cname] 0]
2550	}
2551	set cmap [ColorsToColormap $style(-color)]
2552	set _cname2defaultcolormap($cname) $cmap
2553	set _settings($cname-colormap) $style(-color)
2554	if { [info exists _transferFunctionEditors($cname)] } {
2555	eval $_transferFunctionEditors($cname) limits $_limits($cname)
2556	}
2557	if { [info exists style(-markers)] &&
2558	[llength $style(-markers)] > 0 } {
2559	ParseMarkersOption $cname $style(-markers)
2560	} else {
2561	ParseLevelsOption $cname $style(-levels)
2562	}
2563	} else {
2564	foreach {cmap amap} $_cname2transferFunction($cname) break
2565	}
2566
2567	set amap [ComputeAlphamap $cname]
2568	set opaqueAmap "0.0 1.0 1.0 1.0"
2569	set _cname2transferFunction($cname) [list $cmap $amap]
2570	SendCmd [list colormap add $cname $cmap $amap]
2571	SendCmd [list colormap add $cname-opaque $cmap $opaqueAmap]
2572	}
2573
2574	#
2575	# ResetColormap --
2576	#
2577	# Changes only the colormap portion of the transfer function.
2578	#
2579	itcl::body Rappture::VtkVolumeViewer::ResetColormap { cname color } {
2580	# Get the current transfer function
2581	if { ![info exists _cname2transferFunction($cname)] } {
2582	return
2583	}
2584	foreach { cmap amap } $_cname2transferFunction($cname) break
2585	set cmap [GetColormap $cname $color]
2586	set _cname2transferFunction($cname) [list $cmap $amap]
2587	set opaqueAmap "0.0 1.0 1.0 1.0"
2588	SendCmd [list colormap add $cname $cmap $amap]
2589	SendCmd [list colormap add $cname-opaque $cmap $opaqueAmap]
2590	EventuallyRequestLegend
2591	}
2592
2593	# ----------------------------------------------------------------------
2594	# USAGE: updateTransferFunctions
2595	#
2596	# This is called by the transfer function editor whenever the
2597	# transfer function definition changes.
2598	#
2599	# ----------------------------------------------------------------------
2600	itcl::body Rappture::VtkVolumeViewer::updateTransferFunctions {} {
2601	foreach cname [array names _volcomponents] {
2602	ComputeTransferFunction $cname
2603	}
2604	EventuallyRequestLegend
2605	}
2606
2607	itcl::body Rappture::VtkVolumeViewer::SetOrientation { side } {
2608	array set positions {
2609	front "1 0 0 0"
2610	back "0 0 1 0"
2611	left "0.707107 0 -0.707107 0"
2612	right "0.707107 0 0.707107 0"
2613	top "0.707107 -0.707107 0 0"
2614	bottom "0.707107 0.707107 0 0"
2615	}
2616	foreach name { qw qx qy qz } value $positions($side) {
2617	set _view($name) $value
2618	}
2619	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
2620	$_arcball quaternion $q
2621	SendCmd "camera orient $q"
2622	SendCmd "camera reset"
2623	set _view(xpan) 0
2624	set _view(ypan) 0
2625	set _view(zoom) 1.0
2626	set _settings($this-xpan) $_view(xpan)
2627	set _settings($this-ypan) $_view(ypan)
2628	set _settings($this-zoom) $_view(zoom)
2629	}
2630
2631	#
2632	# InitComponentSettings --
2633	#
2634	# Initializes the volume settings for a specific component. This
2635	# should match what's used as global settings above. This
2636	# is called the first time we try to switch to a given component
2637	# in SwitchComponent below.
2638	#
2639	itcl::body Rappture::VtkVolumeViewer::InitComponentSettings { cname } {
2640	array set _settings [subst {
2641	$cname-ambient 60
2642	$cname-colormap default
2643	$cname-diffuse 40
2644	$cname-light2side 1
2645	$cname-opacity 100
2646	$cname-outline 0
2647	$cname-specularExponent 90
2648	$cname-specularLevel 30
2649	$cname-thickness 350
2650	$cname-transp 50
2651	$cname-volumeVisible 1
2652	}]
2653	}
2654
2655	#
2656	# SwitchComponent --
2657	#
2658	# This is called when the current component is changed by the
2659	# dropdown menu in the volume tab. It synchronizes the global
2660	# volume settings with the settings of the new current component.
2661	#
2662	itcl::body Rappture::VtkVolumeViewer::SwitchComponent { cname } {
2663	if { ![info exists _settings($cname-ambient)] } {
2664	InitComponentSettings $cname
2665	}
2666	# _settings variables change widgets, except for colormap
2667	set _settings($this-ambient) $_settings($cname-ambient)
2668	set _settings($this-colormap) $_settings($cname-colormap)
2669	set _settings($this-diffuse) $_settings($cname-diffuse)
2670	set _settings($this-light2side) $_settings($cname-light2side)
2671	set _settings($this-opacity) $_settings($cname-opacity)
2672	set _settings($this-outline) $_settings($cname-outline)
2673	set _settings($this-specularExponent) $_settings($cname-specularExponent)
2674	set _settings($this-specularLevel) $_settings($cname-specularLevel)
2675	set _settings($this-thickness) $_settings($cname-thickness)
2676	set _settings($this-transp) $_settings($cname-transp)
2677	set _settings($this-volumeVisible) $_settings($cname-volumeVisible)
2678	$itk_component(colormap) value $_settings($cname-colormap)
2679	set _current $cname; # Reset the current component
2680	}
2681
2682	itcl::body Rappture::VtkVolumeViewer::ComputeAlphamap { cname } {
2683	if { ![info exists _transferFunctionEditors($cname)] } {
2684	return [list 0.0 0.0 1.0 1.0]
2685	}
2686	if { ![info exists _settings($cname-ambient)] } {
2687	InitComponentSettings $cname
2688	}
2689	set max 1.0 ; #$_settings($tag-opacity)
2690
2691	set isovalues [$_transferFunctionEditors($cname) values]
2692
2693	# Ensure that the global opacity and thickness settings (in the slider
2694	# settings widgets) are used for the active transfer-function. Update
2695	# the values in the _settings varible.
2696	set opacity [expr { double($_settings($cname-opacity)) * 0.01 }]
2697
2698	# Scale values between 0.00001 and 0.01000
2699	set delta [expr {double($_settings($cname-thickness)) * 0.0001}]
2700
2701	set first [lindex $isovalues 0]
2702	set last [lindex $isovalues end]
2703	set amap ""
2704	if { $first == "" \|\| $first != 0.0 } {
2705	lappend amap 0.0 0.0
2706	}
2707	foreach x $isovalues {
2708	set x1 [expr {$x-$delta-0.00001}]
2709	set x2 [expr {$x-$delta}]
2710	set x3 [expr {$x+$delta}]
2711	set x4 [expr {$x+$delta+0.00001}]
2712	if { $x1 < 0.0 } {
2713	set x1 0.0
2714	} elseif { $x1 > 1.0 } {
2715	set x1 1.0
2716	}
2717	if { $x2 < 0.0 } {
2718	set x2 0.0
2719	} elseif { $x2 > 1.0 } {
2720	set x2 1.0
2721	}
2722	if { $x3 < 0.0 } {
2723	set x3 0.0
2724	} elseif { $x3 > 1.0 } {
2725	set x3 1.0
2726	}
2727	if { $x4 < 0.0 } {
2728	set x4 0.0
2729	} elseif { $x4 > 1.0 } {
2730	set x4 1.0
2731	}
2732	# add spikes in the middle
2733	lappend amap $x1 0.0
2734	lappend amap $x2 $max
2735	lappend amap $x3 $max
2736	lappend amap $x4 0.0
2737	}
2738	if { $last == "" \|\| $last != 1.0 } {
2739	lappend amap 1.0 0.0
2740	}
2741	return $amap
2742	}
2743
2744	#
2745	# HideAllMarkers --
2746	#
2747	# Hide all the markers in all the transfer functions. Can't simply
2748	# delete and recreate markers from the <style> since the user may
2749	# have create, deleted, or moved markers.
2750	#
2751	itcl::body Rappture::VtkVolumeViewer::HideAllMarkers {} {
2752	foreach cname [array names _transferFunctionEditors] {
2753	$_transferFunctionEditors($cname) hideMarkers
2754	}
2755	}
2756
2757
2758	#
2759	# GetDatasetsWithComponents --
2760	#
2761	# Returns a list of all the datasets (known by the combination of
2762	# their data object and component name) that match the given
2763	# component name. For example, this is used where we want to change
2764	# the settings of volumes that have the current component.
2765	#
2766	itcl::body Rappture::VtkVolumeViewer::GetDatasetsWithComponent { cname } {
2767	if { ![info exists _volcomponents($cname)] } {
2768	return ""
2769	}
2770	return $_volcomponents($cname)
2771	}
2772
2773	#
2774	# BuildVolumeComponents --
2775	#
2776	# This is called from the "scale" method which is called when a
2777	# new dataset is added or deleted. It repopulates the dropdown
2778	# menu of volume component names. It sets the current component
2779	# to the first component in the list (of components found).
2780	# Finally, if there is only one component, don't display the
2781	# label or the combobox in the volume settings tab.
2782	#
2783	itcl::body Rappture::VtkVolumeViewer::BuildVolumeComponents {} {
2784	$itk_component(volcomponents) choices delete 0 end
2785	foreach name $_componentsList {
2786	$itk_component(volcomponents) choices insert end $name $name
2787	}
2788	set _current [lindex $_componentsList 0]
2789	$itk_component(volcomponents) value $_current
2790	set parent [winfo parent $itk_component(volcomponents)]
2791	if { [llength $_componentsList] <= 1 } {
2792	# Unpack the components label and dropdown if there's only one
2793	# component.
2794	blt::table forget $parent.volcomponents_l $parent.volcomponents
2795	} else {
2796	# Pack the components label and dropdown into the table there's
2797	# more than one component to select.
2798	blt::table $parent \
2799	0,0 $parent.volcomponents_l -anchor e -cspan 2 \
2800	0,2 $parent.volcomponents -cspan 3 -fill x
2801	}
2802	}
2803
2804	itcl::body Rappture::VtkVolumeViewer::GetColormap { cname color } {
2805	if { $color == "default" } {
2806	return $_cname2defaultcolormap($cname)
2807	}
2808	return [ColorsToColormap $color]
2809	}

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