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source: trunk/gui/scripts/vtkvolumeviewer.tcl @ 4343

Last change on this file since 4343 was 4343, checked in by ldelgass, 10 years ago
Camera setting fixes
File size: 101.6 KB

Line
1	# -- mode: tcl; indent-tabs-mode: nil --
2	# ----------------------------------------------------------------------
3	# COMPONENT: vtkvolumeviewer - Vtk volume viewer
4	#
5	# It connects to the Vtk server running on a rendering farm,
6	# transmits data, and displays the results.
7	# ======================================================================
8	# AUTHOR: Michael McLennan, Purdue University
9	# Copyright (c) 2004-2014 HUBzero Foundation, LLC
10	#
11	# See the file "license.terms" for information on usage and
12	# redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES.
13	# ======================================================================
14	package require Itk
15	package require BLT
16	#package require Img
17
18	option add *VtkVolumeViewer.width 4i widgetDefault
19	option add VtkVolumeViewercursor crosshair widgetDefault
20	option add *VtkVolumeViewer.height 4i widgetDefault
21	option add *VtkVolumeViewer.foreground black widgetDefault
22	option add *VtkVolumeViewer.controlBackground gray widgetDefault
23	option add *VtkVolumeViewer.controlDarkBackground #999999 widgetDefault
24	option add *VtkVolumeViewer.plotBackground black widgetDefault
25	option add *VtkVolumeViewer.plotForeground white widgetDefault
26	option add *VtkVolumeViewer.font \
27	--helvetica-medium-r-normal--12-* widgetDefault
28
29	# must use this name -- plugs into Rappture::resources::load
30	proc VtkVolumeViewer_init_resources {} {
31	Rappture::resources::register \
32	vtkvis_server Rappture::VtkVolumeViewer::SetServerList
33	}
34
35	itcl::class Rappture::VtkVolumeViewer {
36	inherit Rappture::VisViewer
37
38	itk_option define -plotforeground plotForeground Foreground ""
39	itk_option define -plotbackground plotBackground Background ""
40
41	constructor { hostlist args } {
42	Rappture::VisViewer::constructor $hostlist
43	} {
44	# defined below
45	}
46	destructor {
47	# defined below
48	}
49	public proc SetServerList { namelist } {
50	Rappture::VisViewer::SetServerList "vtkvis" $namelist
51	}
52	public method add {dataobj {settings ""}}
53	public method camera {option args}
54	public method delete {args}
55	public method disconnect {}
56	public method download {option args}
57	public method get {args}
58	public method isconnected {}
59	public method parameters {title args} {
60	# do nothing
61	}
62	public method scale {args}
63	public method updateTransferFunctions {}
64
65	private method BuildViewTab {}
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 AddNewMarker { x y }
73	private method InitComponentSettings { cname }
74	private method ParseLevelsOption { cname levels }
75	private method ParseMarkersOption { cname markers }
76	private method ResetColormap { cname color }
77	private method SendTransferFunctions {}
78	private method SetInitialTransferFunction { dataobj cname }
79	private method SetOrientation { side }
80	private method SwitchComponent { cname }
81	private method RemoveMarker { x y }
82	private method ViewToQuaternion {} {
83	return [list $_view(-qw) $_view(-qx) $_view(-qy) $_view(-qz)]
84	}
85	private method QuaternionToView { q } {
86	foreach { _view(-qw) _view(-qx) _view(-qy) _view(-qz) } $q break
87	}
88
89	private variable _current ""; # Currently selected component
90	private variable _volcomponents ; # Array of components found
91	private variable _componentsList ; # Array of components found
92	private variable _cname2style
93	private variable _cname2transferFunction
94	private variable _cname2defaultcolormap
95	private variable _cname2defaultalphamap
96
97	private variable _parsedFunction
98	private variable _transferFunctionEditors
99
100	protected method Connect {}
101	protected method CurrentDatasets {args}
102	protected method Disconnect {}
103	protected method DoResize {}
104	protected method DoRotate {}
105	protected method AdjustSetting {what {value ""}}
106	protected method InitSettings { args }
107	protected method Pan {option x y}
108	protected method Pick {x y}
109	protected method Rebuild {}
110	protected method ReceiveDataset { args }
111	protected method ReceiveImage { args }
112	protected method ReceiveLegend { colormap title vmin vmax size }
113	protected method Rotate {option x y}
114	protected method Zoom {option}
115
116	# The following methods are only used by this class.
117
118	private method BuildAxisTab {}
119	private method BuildCameraTab {}
120	private method BuildCutplaneTab {}
121	private method BuildDownloadPopup { widget command }
122	private method BuildVolumeTab {}
123	private method DrawLegend {}
124	private method DrawLegendOld {}
125	private method Combo { option }
126	private method EnterLegend { x y }
127	private method EventuallyResize { w h }
128	private method EventuallyRequestLegend {}
129	private method EventuallyRotate { q }
130	private method EventuallySetCutplane { axis args }
131	private method GetImage { args }
132	private method GetVtkData { args }
133	private method IsValidObject { dataobj }
134	private method LeaveLegend {}
135	private method MotionLegend { x y }
136	private method PanCamera {}
137	private method RequestLegend {}
138	private method SetLegendTip { x y }
139	private method SetObjectStyle { dataobj comp }
140	private method Slice {option args}
141
142	private variable _arcball ""
143	private variable _dlist "" ; # list of data objects
144	private variable _obj2datasets
145	private variable _obj2ovride ; # maps dataobj => style override
146	private variable _datasets ; # contains all the dataobj-component
147	; # datasets in the server
148	private variable _colormaps ; # contains all the colormaps
149	; # in the server.
150	private variable _dataset2style ;# maps dataobj-component to transfunc
151
152	private variable _click ; # info used for rotate operations
153	private variable _limits ; # autoscale min/max for all axes
154	private variable _view ; # view params for 3D view
155	private variable _settings
156	private variable _style; # Array of current component styles.
157	private variable _initialStyle; # Array of initial component styles.
158	private variable _reset 1; # indicates if camera needs to be reset
159	# to starting position.
160
161	private variable _first "" ; # This is the topmost dataset.
162	private variable _start 0
163	private variable _title ""
164	private variable _seeds
165
166	common _downloadPopup; # download options from popup
167	private common _hardcopy
168	private variable _width 0
169	private variable _height 0
170	private variable _resizePending 0
171	private variable _rotatePending 0
172	private variable _cutplanePending 0
173	private variable _legendPending 0
174	private variable _fields
175	private variable _curFldName ""
176	private variable _curFldLabel ""
177	private variable _cutplaneCmd "imgcutplane"
178	private variable _allowMultiComponent 0
179	private variable _activeVolumes; # Array of volumes that are active.
180	}
181
182	itk::usual VtkVolumeViewer {
183	keep -background -foreground -cursor -font
184	keep -plotbackground -plotforeground
185	}
186
187	# ----------------------------------------------------------------------
188	# CONSTRUCTOR
189	# ----------------------------------------------------------------------
190	itcl::body Rappture::VtkVolumeViewer::constructor {hostlist args} {
191	package require vtk
192	set _serverType "vtkvis"
193
194	EnableWaitDialog 900
195
196	# Rebuild event
197	$_dispatcher register !rebuild
198	$_dispatcher dispatch $this !rebuild "[itcl::code $this Rebuild]; list"
199
200	# Resize event
201	$_dispatcher register !resize
202	$_dispatcher dispatch $this !resize "[itcl::code $this DoResize]; list"
203
204	# Rotate event
205	$_dispatcher register !rotate
206	$_dispatcher dispatch $this !rotate "[itcl::code $this DoRotate]; list"
207
208	# Legend event
209	$_dispatcher register !legend
210	$_dispatcher dispatch $this !legend "[itcl::code $this RequestLegend]; list"
211
212	# X-Cutplane event
213	$_dispatcher register !xcutplane
214	$_dispatcher dispatch $this !xcutplane \
215	"[itcl::code $this AdjustSetting -xcutplaneposition]; list"
216
217	# Y-Cutplane event
218	$_dispatcher register !ycutplane
219	$_dispatcher dispatch $this !ycutplane \
220	"[itcl::code $this AdjustSetting -ycutplaneposition]; list"
221
222	# Z-Cutplane event
223	$_dispatcher register !zcutplane
224	$_dispatcher dispatch $this !zcutplane \
225	"[itcl::code $this AdjustSetting -zcutplaneposition]; list"
226
227	#
228	# Populate parser with commands handle incoming requests
229	#
230	$_parser alias image [itcl::code $this ReceiveImage]
231	$_parser alias dataset [itcl::code $this ReceiveDataset]
232	$_parser alias legend [itcl::code $this ReceiveLegend]
233
234	# Initialize the view to some default parameters.
235	array set _view {
236	-qw 0.853553
237	-qx -0.353553
238	-qy 0.353553
239	-qz 0.146447
240	-zoom 1.0
241	-xpan 0
242	-ypan 0
243	-ortho 0
244	}
245	set _arcball [blt::arcball create 100 100]
246	$_arcball quaternion [ViewToQuaternion]
247
248	array set _settings {
249	-axesvisible 1
250	-axislabelsvisible 1
251	-background black
252	-cutplanelighting 1
253	-cutplaneopacity 100
254	-cutplanesvisible 0
255	-legendvisible 1
256	-volumeambient 40
257	-volumeblendmode composite
258	-volumediffuse 60
259	-volumelighting 1
260	-volumeopacity 50
261	-volumeoutline 0
262	-volumeoutline 0
263	-volumequality 80
264	-volumespecularexponent 90
265	-volumespecularlevel 30
266	-volumethickness 350
267	-volumevisible 1
268	-xcutplaneposition 50
269	-xcutplanevisible 1
270	-xgridvisible 0
271	-ycutplaneposition 50
272	-ycutplanevisible 1
273	-ygridvisible 0
274	-zcutplaneposition 50
275	-zcutplanevisible 1
276	-zgridvisible 0
277	}
278
279	itk_component add view {
280	canvas $itk_component(plotarea).view \
281	-highlightthickness 0 -borderwidth 0
282	} {
283	usual
284	ignore -highlightthickness -borderwidth -background
285	}
286
287	itk_component add fieldmenu {
288	menu $itk_component(plotarea).menu -bg black -fg white -relief flat \
289	-tearoff no
290	} {
291	usual
292	ignore -background -foreground -relief -tearoff
293	}
294	set c $itk_component(view)
295	bind $c <Configure> [itcl::code $this EventuallyResize %w %h]
296	bind $c <4> [itcl::code $this Zoom in 0.25]
297	bind $c <5> [itcl::code $this Zoom out 0.25]
298	bind $c <KeyPress-Left> [list %W xview scroll 10 units]
299	bind $c <KeyPress-Right> [list %W xview scroll -10 units]
300	bind $c <KeyPress-Up> [list %W yview scroll 10 units]
301	bind $c <KeyPress-Down> [list %W yview scroll -10 units]
302	bind $c <Enter> "focus %W"
303	bind $c <Control-F1> [itcl::code $this ToggleConsole]
304
305	# Fixes the scrollregion in case we go off screen
306	$c configure -scrollregion [$c bbox all]
307
308	set _map(id) [$c create image 0 0 -anchor nw -image $_image(plot)]
309	set _map(cwidth) -1
310	set _map(cheight) -1
311	set _map(zoom) 1.0
312	set _map(original) ""
313
314	set f [$itk_component(main) component controls]
315	itk_component add reset {
316	button $f.reset -borderwidth 1 -padx 1 -pady 1 \
317	-highlightthickness 0 \
318	-image [Rappture::icon reset-view] \
319	-command [itcl::code $this Zoom reset]
320	} {
321	usual
322	ignore -highlightthickness
323	}
324	pack $itk_component(reset) -side top -padx 2 -pady 2
325	Rappture::Tooltip::for $itk_component(reset) "Reset the view to the default zoom level"
326
327	itk_component add zoomin {
328	button $f.zin -borderwidth 1 -padx 1 -pady 1 \
329	-highlightthickness 0 \
330	-image [Rappture::icon zoom-in] \
331	-command [itcl::code $this Zoom in]
332	} {
333	usual
334	ignore -highlightthickness
335	}
336	pack $itk_component(zoomin) -side top -padx 2 -pady 2
337	Rappture::Tooltip::for $itk_component(zoomin) "Zoom in"
338
339	itk_component add zoomout {
340	button $f.zout -borderwidth 1 -padx 1 -pady 1 \
341	-highlightthickness 0 \
342	-image [Rappture::icon zoom-out] \
343	-command [itcl::code $this Zoom out]
344	} {
345	usual
346	ignore -highlightthickness
347	}
348	pack $itk_component(zoomout) -side top -padx 2 -pady 2
349	Rappture::Tooltip::for $itk_component(zoomout) "Zoom out"
350
351	itk_component add volume {
352	Rappture::PushButton $f.volume \
353	-onimage [Rappture::icon volume-on] \
354	-offimage [Rappture::icon volume-off] \
355	-variable [itcl::scope _settings(-volumevisible)] \
356	-command [itcl::code $this AdjustSetting -volumevisible]
357	}
358	$itk_component(volume) select
359	Rappture::Tooltip::for $itk_component(volume) \
360	"Don't display the volume"
361	pack $itk_component(volume) -padx 2 -pady 2
362
363	itk_component add cutplane {
364	Rappture::PushButton $f.cutplane \
365	-onimage [Rappture::icon cutbutton] \
366	-offimage [Rappture::icon cutbutton] \
367	-variable [itcl::scope _settings(-cutplanesvisible)] \
368	-command [itcl::code $this AdjustSetting -cutplanesvisible]
369	}
370	Rappture::Tooltip::for $itk_component(cutplane) \
371	"Show/Hide cutplanes"
372	pack $itk_component(cutplane) -padx 2 -pady 2
373
374	if { [catch {
375	BuildViewTab
376	BuildVolumeTab
377	BuildCutplaneTab
378	BuildAxisTab
379	BuildCameraTab
380	} errs] != 0 } {
381	puts stderr errs=$errs
382	}
383
384	# Legend
385	set _image(legend) [image create photo]
386	itk_component add legend {
387	canvas $itk_component(plotarea).legend -height 50 -highlightthickness 0
388	} {
389	usual
390	ignore -highlightthickness
391	rename -background -plotbackground plotBackground Background
392	}
393	bind $itk_component(legend) <KeyPress-Delete> \
394	[itcl::code $this RemoveMarker %x %y]
395	bind $itk_component(legend) <Enter> \
396	[list focus $itk_component(legend)]
397
398	# Hack around the Tk panewindow. The problem is that the requested
399	# size of the 3d view isn't set until an image is retrieved from
400	# the server. So the panewindow uses the tiny size.
401	set w 10000
402	pack forget $itk_component(view)
403	blt::table $itk_component(plotarea) \
404	0,0 $itk_component(view) -fill both -reqwidth $w \
405	1,0 $itk_component(legend) -fill x
406	blt::table configure $itk_component(plotarea) r1 -resize none
407
408	# Bindings for rotation via mouse
409	bind $itk_component(view) <ButtonPress-1> \
410	[itcl::code $this Rotate click %x %y]
411	bind $itk_component(view) <B1-Motion> \
412	[itcl::code $this Rotate drag %x %y]
413	bind $itk_component(view) <ButtonRelease-1> \
414	[itcl::code $this Rotate release %x %y]
415	bind $itk_component(view) <Configure> \
416	[itcl::code $this EventuallyResize %w %h]
417
418	# Bindings for panning via mouse
419	bind $itk_component(view) <ButtonPress-2> \
420	[itcl::code $this Pan click %x %y]
421	bind $itk_component(view) <B2-Motion> \
422	[itcl::code $this Pan drag %x %y]
423	bind $itk_component(view) <ButtonRelease-2> \
424	[itcl::code $this Pan release %x %y]
425
426	#bind $itk_component(view) <ButtonRelease-3> \
427	# [itcl::code $this Pick %x %y]
428
429	# Bindings for panning via keyboard
430	bind $itk_component(view) <KeyPress-Left> \
431	[itcl::code $this Pan set -10 0]
432	bind $itk_component(view) <KeyPress-Right> \
433	[itcl::code $this Pan set 10 0]
434	bind $itk_component(view) <KeyPress-Up> \
435	[itcl::code $this Pan set 0 -10]
436	bind $itk_component(view) <KeyPress-Down> \
437	[itcl::code $this Pan set 0 10]
438	bind $itk_component(view) <Shift-KeyPress-Left> \
439	[itcl::code $this Pan set -2 0]
440	bind $itk_component(view) <Shift-KeyPress-Right> \
441	[itcl::code $this Pan set 2 0]
442	bind $itk_component(view) <Shift-KeyPress-Up> \
443	[itcl::code $this Pan set 0 -2]
444	bind $itk_component(view) <Shift-KeyPress-Down> \
445	[itcl::code $this Pan set 0 2]
446
447	# Bindings for zoom via keyboard
448	bind $itk_component(view) <KeyPress-Prior> \
449	[itcl::code $this Zoom out]
450	bind $itk_component(view) <KeyPress-Next> \
451	[itcl::code $this Zoom in]
452
453	bind $itk_component(view) <Enter> "focus $itk_component(view)"
454
455	if {[string equal "x11" [tk windowingsystem]]} {
456	# Bindings for zoom via mouse
457	bind $itk_component(view) <4> [itcl::code $this Zoom out]
458	bind $itk_component(view) <5> [itcl::code $this Zoom in]
459	}
460
461	set _image(download) [image create photo]
462
463	eval itk_initialize $args
464	Connect
465	update
466	}
467
468	# ----------------------------------------------------------------------
469	# DESTRUCTOR
470	# ----------------------------------------------------------------------
471	itcl::body Rappture::VtkVolumeViewer::destructor {} {
472	Disconnect
473	image delete $_image(plot)
474	image delete $_image(download)
475	catch { blt::arcball destroy $_arcball }
476	}
477
478	itcl::body Rappture::VtkVolumeViewer::DoResize {} {
479	if { $_width < 2 } {
480	set _width 500
481	}
482	if { $_height < 2 } {
483	set _height 500
484	}
485	set _start [clock clicks -milliseconds]
486	SendCmd "screen size $_width $_height"
487
488	EventuallyRequestLegend
489	set _resizePending 0
490	}
491
492	itcl::body Rappture::VtkVolumeViewer::DoRotate {} {
493	SendCmd "camera orient [ViewToQuaternion]"
494	set _rotatePending 0
495	}
496
497	itcl::body Rappture::VtkVolumeViewer::EventuallyResize { w h } {
498	set _width $w
499	set _height $h
500	$_arcball resize $w $h
501	if { !$_resizePending } {
502	set _resizePending 1
503	$_dispatcher event -after 400 !resize
504	}
505	}
506
507	itcl::body Rappture::VtkVolumeViewer::EventuallyRequestLegend {} {
508	if { !$_legendPending } {
509	set _legendPending 1
510	$_dispatcher event -idle !legend
511	}
512	}
513
514	set rotate_delay 100
515
516	itcl::body Rappture::VtkVolumeViewer::EventuallyRotate { q } {
517	QuaternionToView $q
518	if { !$_rotatePending } {
519	set _rotatePending 1
520	global rotate_delay
521	$_dispatcher event -after $rotate_delay !rotate
522	}
523	}
524
525	itcl::body Rappture::VtkVolumeViewer::EventuallySetCutplane { axis args } {
526	if { !$_cutplanePending } {
527	set _cutplanePending 1
528	$_dispatcher event -after 100 !${axis}cutplane
529	}
530	}
531
532	# ----------------------------------------------------------------------
533	# USAGE: add <dataobj> ?<settings>?
534	#
535	# Clients use this to add a data object to the plot. The optional
536	# <settings> are used to configure the plot. Allowed settings are
537	# -color, -brightness, -width, -linestyle, and -raise.
538	# ----------------------------------------------------------------------
539	itcl::body Rappture::VtkVolumeViewer::add {dataobj {settings ""}} {
540	if { ![IsValidObject $dataobj] } {
541	return; # Ignore invalid objects.
542	}
543	array set params {
544	-color auto
545	-width 1
546	-linestyle solid
547	-brightness 0
548	-raise 0
549	-description ""
550	-param ""
551	-type ""
552	}
553	array set params $settings
554	set params(-description) ""
555	set params(-param) ""
556	array set params $settings
557
558	if {$params(-color) == "auto" \|\| $params(-color) == "autoreset"} {
559	# can't handle -autocolors yet
560	set params(-color) black
561	}
562	set pos [lsearch -exact $_dlist $dataobj]
563	if {$pos < 0} {
564	lappend _dlist $dataobj
565	}
566	set _obj2ovride($dataobj-color) $params(-color)
567	set _obj2ovride($dataobj-width) $params(-width)
568	set _obj2ovride($dataobj-raise) $params(-raise)
569	$_dispatcher event -idle !rebuild
570	}
571
572
573	# ----------------------------------------------------------------------
574	# USAGE: delete ?<dataobj1> <dataobj2> ...?
575	#
576	# Clients use this to delete a dataobj from the plot. If no dataobjs
577	# are specified, then all dataobjs are deleted. No data objects are
578	# deleted. They are only removed from the display list.
579	#
580	# ----------------------------------------------------------------------
581	itcl::body Rappture::VtkVolumeViewer::delete {args} {
582	if { [llength $args] == 0} {
583	set args $_dlist
584	}
585	# Delete all specified dataobjs
586	set changed 0
587	foreach dataobj $args {
588	set pos [lsearch -exact $_dlist $dataobj]
589	if { $pos < 0 } {
590	continue; # Don't know anything about it.
591	}
592	# Remove it from the dataobj list.
593	set _dlist [lreplace $_dlist $pos $pos]
594	array unset _obj2ovride $dataobj-*
595	array unset _settings $dataobj-*
596	set changed 1
597	}
598	# If anything changed, then rebuild the plot
599	if { $changed } {
600	$_dispatcher event -idle !rebuild
601	}
602	}
603
604	# ----------------------------------------------------------------------
605	# USAGE: get ?-objects?
606	# USAGE: get ?-visible?
607	# USAGE: get ?-image view?
608	#
609	# Clients use this to query the list of objects being plotted, in
610	# order from bottom to top of this result. The optional "-image"
611	# flag can also request the internal images being shown.
612	# ----------------------------------------------------------------------
613	itcl::body Rappture::VtkVolumeViewer::get {args} {
614	if {[llength $args] == 0} {
615	set args "-objects"
616	}
617
618	set op [lindex $args 0]
619	switch -- $op {
620	"-objects" {
621	# put the dataobj list in order according to -raise options
622	set dlist {}
623	foreach dataobj $_dlist {
624	if { ![IsValidObject $dataobj] } {
625	continue
626	}
627	if {[info exists _obj2ovride($dataobj-raise)] &&
628	$_obj2ovride($dataobj-raise)} {
629	set dlist [linsert $dlist 0 $dataobj]
630	} else {
631	lappend dlist $dataobj
632	}
633	}
634	return $dlist
635	}
636	"-visible" {
637	set dlist {}
638	foreach dataobj $_dlist {
639	if { ![IsValidObject $dataobj] } {
640	continue
641	}
642	if { ![info exists _obj2ovride($dataobj-raise)] } {
643	# No setting indicates that the object isn't visible.
644	continue
645	}
646	# Otherwise use the -raise parameter to put the object to
647	# the front of the list.
648	if { $_obj2ovride($dataobj-raise) } {
649	set dlist [linsert $dlist 0 $dataobj]
650	} else {
651	lappend dlist $dataobj
652	}
653	}
654	return $dlist
655	}
656	-image {
657	if {[llength $args] != 2} {
658	error "wrong # args: should be \"get -image view\""
659	}
660	switch -- [lindex $args end] {
661	view {
662	return $_image(plot)
663	}
664	default {
665	error "bad image name \"[lindex $args end]\": should be view"
666	}
667	}
668	}
669	default {
670	error "bad option \"$op\": should be -objects or -image"
671	}
672	}
673	}
674
675	# ----------------------------------------------------------------------
676	# USAGE: scale ?<data1> <data2> ...?
677	#
678	# Sets the default limits for the overall plot according to the
679	# limits of the data for all of the given <data> objects. This
680	# accounts for all objects--even those not showing on the screen.
681	# Because of this, the limits are appropriate for all objects as
682	# the user scans through data in the ResultSet viewer.
683	# ----------------------------------------------------------------------
684	itcl::body Rappture::VtkVolumeViewer::scale {args} {
685	array unset _limits
686	array unset _volcomponents
687
688	foreach dataobj $args {
689	if { ![$dataobj isvalid] } {
690	continue; # Object doesn't contain valid data.
691	}
692	# Determine limits for each axis.
693	foreach axis {x y z v} {
694	foreach { min max } [$dataobj limits $axis] break
695	if {"" != $min && "" != $max} {
696	if { ![info exists _limits($axis)] } {
697	set _limits($axis) [list $min $max]
698	} else {
699	foreach {amin amax} $_limits($axis) break
700	if {$min < $amin} {
701	set amin $min
702	}
703	if {$max > $amax} {
704	set amax $max
705	}
706	set _limits($axis) [list $amin $amax]
707	}
708	}
709	}
710	# Determine limits for each field.
711	foreach { fname lim } [$dataobj fieldlimits] {
712	if { ![info exists _limits($fname)] } {
713	set _limits($fname) $lim
714	continue
715	}
716	foreach {min max} $lim break
717	foreach {fmin fmax} $_limits($fname) break
718	if { $fmin > $min } {
719	set fmin $min
720	}
721	if { $fmax < $max } {
722	set fmax $max
723	}
724	set _limits($fname) [list $fmin $fmax]
725	}
726	# Get limits for each component.
727	foreach cname [$dataobj components] {
728	if { ![info exists _volcomponents($cname)] } {
729	lappend _componentsList $cname
730	}
731	lappend _volcomponents($cname) $dataobj-$cname
732	array unset limits
733	array set limits [$dataobj valueLimits $cname]
734	foreach {min max} $limits(v) break
735	if { ![info exists _limits($cname)] } {
736	set _limits($cname) [list $min $max]
737	} else {
738	foreach {vmin vmax} $_limits($cname) break
739	if { $min < $vmin } {
740	set vmin $min
741	}
742	if { $max > $vmax } {
743	set vmax $max
744	}
745	set _limits($cname) [list $vmin $vmax]
746	}
747	}
748	}
749	BuildVolumeComponents
750	updateTransferFunctions
751	}
752
753	# ----------------------------------------------------------------------
754	# USAGE: download coming
755	# USAGE: download controls <downloadCommand>
756	# USAGE: download now
757	#
758	# Clients use this method to create a downloadable representation
759	# of the plot. Returns a list of the form {ext string}, where
760	# "ext" is the file extension (indicating the type of data) and
761	# "string" is the data itself.
762	# ----------------------------------------------------------------------
763	itcl::body Rappture::VtkVolumeViewer::download {option args} {
764	switch $option {
765	coming {
766	if {[catch {
767	blt::winop snap $itk_component(plotarea) $_image(download)
768	}]} {
769	$_image(download) configure -width 1 -height 1
770	$_image(download) put #000000
771	}
772	}
773	controls {
774	set popup .vtkviewerdownload
775	if { ![winfo exists .vtkviewerdownload] } {
776	set inner [BuildDownloadPopup $popup [lindex $args 0]]
777	} else {
778	set inner [$popup component inner]
779	}
780	set _downloadPopup(image_controls) $inner.image_frame
781	set num [llength [get]]
782	set num [expr {($num == 1) ? "1 result" : "$num results"}]
783	set word [Rappture::filexfer::label downloadWord]
784	$inner.summary configure -text "$word $num in the following format:"
785	update idletasks ;# Fix initial sizes
786	return $popup
787	}
788	now {
789	set popup .vtkviewerdownload
790	if {[winfo exists .vtkviewerdownload]} {
791	$popup deactivate
792	}
793	switch -- $_downloadPopup(format) {
794	"image" {
795	return [$this GetImage [lindex $args 0]]
796	}
797	"vtk" {
798	return [$this GetVtkData [lindex $args 0]]
799	}
800	}
801	return ""
802	}
803	default {
804	error "bad option \"$option\": should be coming, controls, now"
805	}
806	}
807	}
808
809	# ----------------------------------------------------------------------
810	# USAGE: Connect ?<host:port>,<host:port>...?
811	#
812	# Clients use this method to establish a connection to a new
813	# server, or to reestablish a connection to the previous server.
814	# Any existing connection is automatically closed.
815	# ----------------------------------------------------------------------
816	itcl::body Rappture::VtkVolumeViewer::Connect {} {
817	set _hosts [GetServerList "vtkvis"]
818	if { "" == $_hosts } {
819	return 0
820	}
821	set result [VisViewer::Connect $_hosts]
822	if { $result } {
823	if { $_reportClientInfo } {
824	# Tell the server the viewer, hub, user and session.
825	# Do this immediately on connect before buffering any commands
826	global env
827
828	set info {}
829	set user "???"
830	if { [info exists env(USER)] } {
831	set user $env(USER)
832	}
833	set session "???"
834	if { [info exists env(SESSION)] } {
835	set session $env(SESSION)
836	}
837	lappend info "hub" [exec hostname]
838	lappend info "client" "vtkvolumeviewer"
839	lappend info "user" $user
840	lappend info "session" $session
841	SendCmd "clientinfo [list $info]"
842	}
843
844	set w [winfo width $itk_component(view)]
845	set h [winfo height $itk_component(view)]
846	EventuallyResize $w $h
847	}
848	return $result
849	}
850
851	#
852	# isconnected --
853	#
854	# Indicates if we are currently connected to the visualization server.
855	#
856	itcl::body Rappture::VtkVolumeViewer::isconnected {} {
857	return [VisViewer::IsConnected]
858	}
859
860	#
861	# disconnect --
862	#
863	itcl::body Rappture::VtkVolumeViewer::disconnect {} {
864	Disconnect
865	}
866
867	#
868	# Disconnect --
869	#
870	# Clients use this method to disconnect from the current rendering
871	# server.
872	#
873	itcl::body Rappture::VtkVolumeViewer::Disconnect {} {
874	VisViewer::Disconnect
875
876	$_dispatcher cancel !rebuild
877	$_dispatcher cancel !resize
878	$_dispatcher cancel !rotate
879	$_dispatcher cancel !xcutplane
880	$_dispatcher cancel !ycutplane
881	$_dispatcher cancel !zcutplane
882	$_dispatcher cancel !legend
883	# disconnected -- no more data sitting on server
884	set _outbuf ""
885	array unset _datasets
886	array unset _data
887	array unset _colormaps
888	array unset _seeds
889	array unset _dataset2style
890	array unset _obj2datasets
891
892	array unset _cname2style
893	array unset _parsedFunction
894	array unset _cname2transferFunction
895
896	set _resizePending 0
897	set _rotatePending 0
898	set _cutplanePending 0
899	set _legendPending 0
900	set _reset 1
901	}
902
903	# ----------------------------------------------------------------------
904	# USAGE: ReceiveImage -bytes <size> -type <type> -token <token>
905	#
906	# Invoked automatically whenever the "image" command comes in from
907	# the rendering server. Indicates that binary image data with the
908	# specified <size> will follow.
909	# ----------------------------------------------------------------------
910	itcl::body Rappture::VtkVolumeViewer::ReceiveImage { args } {
911	array set info {
912	-token "???"
913	-bytes 0
914	-type image
915	}
916	array set info $args
917	set bytes [ReceiveBytes $info(-bytes)]
918	StopWaiting
919	if { $info(-type) == "image" } {
920	if 0 {
921	set f [open "last.ppm" "w"]
922	puts $f $bytes
923	close $f
924	}
925	$_image(plot) configure -data $bytes
926	#puts stderr "[clock format [clock seconds]]: received image [image width $_image(plot)]x[image height $_image(plot)] image>"
927	if { $_start > 0 } {
928	set finish [clock clicks -milliseconds]
929	#puts stderr "round trip time [expr $finish -$_start] milliseconds"
930	set _start 0
931	}
932	} elseif { $info(type) == "print" } {
933	set tag $this-print-$info(-token)
934	set _hardcopy($tag) $bytes
935	}
936	}
937
938	#
939	# ReceiveDataset --
940	#
941	itcl::body Rappture::VtkVolumeViewer::ReceiveDataset { args } {
942	if { ![isconnected] } {
943	return
944	}
945	set option [lindex $args 0]
946	switch -- $option {
947	"scalar" {
948	set option [lindex $args 1]
949	switch -- $option {
950	"world" {
951	foreach { x y z value tag } [lrange $args 2 end] break
952	}
953	"pixel" {
954	foreach { x y value tag } [lrange $args 2 end] break
955	}
956	}
957	}
958	"vector" {
959	set option [lindex $args 1]
960	switch -- $option {
961	"world" {
962	foreach { x y z vx vy vz tag } [lrange $args 2 end] break
963	}
964	"pixel" {
965	foreach { x y vx vy vz tag } [lrange $args 2 end] break
966	}
967	}
968	}
969	"names" {
970	foreach { name } [lindex $args 1] {
971	#puts stderr "Dataset: $name"
972	}
973	}
974	default {
975	error "unknown dataset option \"$option\" from server"
976	}
977	}
978	}
979
980	# ----------------------------------------------------------------------
981	# USAGE: Rebuild
982	#
983	# Called automatically whenever something changes that affects the
984	# data in the widget. Clears any existing data and rebuilds the
985	# widget to display new data.
986	# ----------------------------------------------------------------------
987	itcl::body Rappture::VtkVolumeViewer::Rebuild {} {
988	set w [winfo width $itk_component(view)]
989	set h [winfo height $itk_component(view)]
990
991	if { $w < 2 \|\| $h < 2 } {
992	$_dispatcher event -idle !rebuild
993	return
994	}
995
996	# Turn on buffering of commands to the server. We don't want to
997	# be preempted by a server disconnect/reconnect (which automatically
998	# generates a new call to Rebuild).
999	StartBufferingCommands
1000
1001	if { $_width != $w \|\| $_height != $h \|\| $_reset } {
1002	set _width $w
1003	set _height $h
1004	$_arcball resize $w $h
1005	DoResize
1006	}
1007	if { $_reset } {
1008	#
1009	# Reset the camera and other view parameters
1010	#
1011	$_arcball quaternion [ViewToQuaternion]
1012	if {$_view(-ortho)} {
1013	SendCmd "camera mode ortho"
1014	} else {
1015	SendCmd "camera mode persp"
1016	}
1017	DoRotate
1018	InitSettings -volumeoutline -background \
1019	-xgridvisible -ygridvisible -zgridvisible -axisflymode \
1020	-axesvisible -axislabelsvisible
1021	PanCamera
1022	}
1023
1024	SendCmd "imgflush"
1025	set _first ""
1026
1027	SendCmd "volume visible 0"
1028
1029	# No volumes are active (i.e. in the working set of displayed volumes).
1030	# A volume is always invisible if it's not in the working set. A
1031	# volume in the working set may be visible/invisible depending upon the
1032	# global visibility value.
1033	array unset _activeVolumes
1034	foreach dataobj [get -objects] {
1035	if { [info exists _obj2ovride($dataobj-raise)] && $_first == "" } {
1036	set _first $dataobj
1037	}
1038	set _obj2datasets($dataobj) ""
1039	foreach comp [$dataobj components] {
1040	set tag $dataobj-$comp
1041	if { ![info exists _datasets($tag)] } {
1042	set bytes [$dataobj vtkdata $comp]
1043	set length [string length $bytes]
1044	if { $_reportClientInfo } {
1045	set info {}
1046	lappend info "tool_id" [$dataobj hints toolId]
1047	lappend info "tool_name" [$dataobj hints toolName]
1048	lappend info "tool_version" [$dataobj hints toolRevision]
1049	lappend info "tool_title" [$dataobj hints toolTitle]
1050	lappend info "dataset_label" [$dataobj hints label]
1051	lappend info "dataset_size" $length
1052	lappend info "dataset_tag" $tag
1053	SendCmd [list "clientinfo" $info]
1054	}
1055	append _outbuf "dataset add $tag data follows $length\n"
1056	append _outbuf $bytes
1057	set _datasets($tag) 1
1058	SetObjectStyle $dataobj $comp
1059	}
1060	lappend _obj2datasets($dataobj) $tag
1061	if { [info exists _obj2ovride($dataobj-raise)] } {
1062	SendCmd "volume visible 1 $tag"
1063	}
1064	break
1065	}
1066	}
1067	if {"" != $_first} {
1068	set location [$_first hints camera]
1069	if { $location != "" } {
1070	array set view $location
1071	}
1072
1073	foreach axis { x y z } {
1074	set label [$_first hints ${axis}label]
1075	if { $label != "" } {
1076	SendCmd [list axis name $axis $label]
1077	}
1078	set units [$_first hints ${axis}units]
1079	if { $units != "" } {
1080	SendCmd [list axis units $axis $units]
1081	}
1082	}
1083	$itk_component(field) choices delete 0 end
1084	$itk_component(fieldmenu) delete 0 end
1085	array unset _fields
1086	set _curFldName ""
1087	foreach cname [$_first components] {
1088	foreach fname [$_first fieldnames $cname] {
1089	if { [info exists _fields($fname)] } {
1090	continue
1091	}
1092	foreach { label units components } \
1093	[$_first fieldinfo $fname] break
1094	# Only scalar fields are valid
1095	if {$_allowMultiComponent \|\| $components == 1} {
1096	$itk_component(field) choices insert end "$fname" "$label"
1097	$itk_component(fieldmenu) add radiobutton -label "$label" \
1098	-value $label -variable [itcl::scope _curFldLabel] \
1099	-selectcolor red \
1100	-activebackground $itk_option(-plotbackground) \
1101	-activeforeground $itk_option(-plotforeground) \
1102	-font "Arial 8" \
1103	-command [itcl::code $this Combo invoke]
1104	set _fields($fname) [list $label $units $components]
1105	if { $_curFldName == "" } {
1106	set _curFldName $fname
1107	set _curFldLabel $label
1108	}
1109	}
1110	}
1111	}
1112	$itk_component(field) value $_curFldLabel
1113	}
1114
1115	InitSettings -color \
1116	-volumeambient -volumediffuse -volumespecularlevel \
1117	-volumespecularexponent -volumeblendmode -volumethickness \
1118	-volumeopacity -volumequality -volumevisible \
1119	-cutplanesvisible \
1120	-xcutplaneposition -ycutplaneposition -zcutplaneposition \
1121	-xcutplanevisible -ycutplanevisible -zcutplanevisible
1122
1123	if { $_reset } {
1124	InitSettings -volumelighting
1125	SendCmd "camera reset"
1126	SendCmd "camera zoom $_view(-zoom)"
1127	RequestLegend
1128	set _reset 0
1129	}
1130	# Actually write the commands to the server socket. If it fails, we don't
1131	# care. We're finished here.
1132	blt::busy hold $itk_component(hull)
1133	StopBufferingCommands
1134	blt::busy release $itk_component(hull)
1135	}
1136
1137	# ----------------------------------------------------------------------
1138	# USAGE: CurrentDatasets ?-all -visible? ?dataobjs?
1139	#
1140	# Returns a list of server IDs for the current datasets being displayed. This
1141	# is normally a single ID, but it might be a list of IDs if the current data
1142	# object has multiple components.
1143	# ----------------------------------------------------------------------
1144	itcl::body Rappture::VtkVolumeViewer::CurrentDatasets {args} {
1145	set flag [lindex $args 0]
1146	switch -- $flag {
1147	"-all" {
1148	if { [llength $args] > 1 } {
1149	error "CurrentDatasets: can't specify dataobj after \"-all\""
1150	}
1151	set dlist [get -objects]
1152	}
1153	"-visible" {
1154	if { [llength $args] > 1 } {
1155	set dlist {}
1156	set args [lrange $args 1 end]
1157	foreach dataobj $args {
1158	if { [info exists _obj2ovride($dataobj-raise)] } {
1159	lappend dlist $dataobj
1160	}
1161	}
1162	} else {
1163	set dlist [get -visible]
1164	}
1165	}
1166	default {
1167	set dlist $args
1168	}
1169	}
1170	set rlist ""
1171	foreach dataobj $dlist {
1172	foreach comp [$dataobj components] {
1173	set tag $dataobj-$comp
1174	if { [info exists _datasets($tag)] && $_datasets($tag) } {
1175	lappend rlist $tag
1176	}
1177	}
1178	}
1179	return $rlist
1180	}
1181
1182	# ----------------------------------------------------------------------
1183	# USAGE: Zoom in
1184	# USAGE: Zoom out
1185	# USAGE: Zoom reset
1186	#
1187	# Called automatically when the user clicks on one of the zoom
1188	# controls for this widget. Changes the zoom for the current view.
1189	# ----------------------------------------------------------------------
1190	itcl::body Rappture::VtkVolumeViewer::Zoom {option} {
1191	switch -- $option {
1192	"in" {
1193	set _view(-zoom) [expr {$_view(-zoom)*1.25}]
1194	SendCmd "camera zoom $_view(-zoom)"
1195	}
1196	"out" {
1197	set _view(-zoom) [expr {$_view(-zoom)*0.8}]
1198	SendCmd "camera zoom $_view(-zoom)"
1199	}
1200	"reset" {
1201	array set _view {
1202	-qw 0.853553
1203	-qx -0.353553
1204	-qy 0.353553
1205	-qz 0.146447
1206	-zoom 1.0
1207	-xpan 0
1208	-ypan 0
1209	}
1210	if { $_first != "" } {
1211	set location [$_first hints camera]
1212	if { $location != "" } {
1213	array set _view $location
1214	}
1215	}
1216	$_arcball quaternion [ViewToQuaternion]
1217	DoRotate
1218	SendCmd "camera reset"
1219	}
1220	}
1221	}
1222
1223	itcl::body Rappture::VtkVolumeViewer::PanCamera {} {
1224	set x $_view(-xpan)
1225	set y $_view(-ypan)
1226	SendCmd "camera pan $x $y"
1227	}
1228
1229
1230	# ----------------------------------------------------------------------
1231	# USAGE: Rotate click <x> <y>
1232	# USAGE: Rotate drag <x> <y>
1233	# USAGE: Rotate release <x> <y>
1234	#
1235	# Called automatically when the user clicks/drags/releases in the
1236	# plot area. Moves the plot according to the user's actions.
1237	# ----------------------------------------------------------------------
1238	itcl::body Rappture::VtkVolumeViewer::Rotate {option x y} {
1239	switch -- $option {
1240	"click" {
1241	$itk_component(view) configure -cursor fleur
1242	set _click(x) $x
1243	set _click(y) $y
1244	}
1245	"drag" {
1246	if {[array size _click] == 0} {
1247	Rotate click $x $y
1248	} else {
1249	set w [winfo width $itk_component(view)]
1250	set h [winfo height $itk_component(view)]
1251	if {$w <= 0 \|\| $h <= 0} {
1252	return
1253	}
1254
1255	if {[catch {
1256	# this fails sometimes for no apparent reason
1257	set dx [expr {double($x-$_click(x))/$w}]
1258	set dy [expr {double($y-$_click(y))/$h}]
1259	}]} {
1260	return
1261	}
1262	if { $dx == 0 && $dy == 0 } {
1263	return
1264	}
1265	set q [$_arcball rotate $x $y $_click(x) $_click(y)]
1266	EventuallyRotate $q
1267	set _click(x) $x
1268	set _click(y) $y
1269	}
1270	}
1271	"release" {
1272	Rotate drag $x $y
1273	$itk_component(view) configure -cursor ""
1274	catch {unset _click}
1275	}
1276	default {
1277	error "bad option \"$option\": should be click, drag, release"
1278	}
1279	}
1280	}
1281
1282	itcl::body Rappture::VtkVolumeViewer::Pick {x y} {
1283	foreach tag [CurrentDatasets -visible] {
1284	SendCmd "dataset getscalar pixel $x $y $tag"
1285	}
1286	}
1287
1288	# ----------------------------------------------------------------------
1289	# USAGE: $this Pan click x y
1290	# $this Pan drag x y
1291	# $this Pan release x y
1292	#
1293	# Called automatically when the user clicks on one of the zoom
1294	# controls for this widget. Changes the zoom for the current view.
1295	# ----------------------------------------------------------------------
1296	itcl::body Rappture::VtkVolumeViewer::Pan {option x y} {
1297	switch -- $option {
1298	"set" {
1299	set w [winfo width $itk_component(view)]
1300	set h [winfo height $itk_component(view)]
1301	set x [expr $x / double($w)]
1302	set y [expr $y / double($h)]
1303	set _view(-xpan) [expr $_view(-xpan) + $x]
1304	set _view(-ypan) [expr $_view(-ypan) + $y]
1305	PanCamera
1306	return
1307	}
1308	"click" {
1309	set _click(x) $x
1310	set _click(y) $y
1311	$itk_component(view) configure -cursor hand1
1312	}
1313	"drag" {
1314	if { ![info exists _click(x)] } {
1315	set _click(x) $x
1316	}
1317	if { ![info exists _click(y)] } {
1318	set _click(y) $y
1319	}
1320	set w [winfo width $itk_component(view)]
1321	set h [winfo height $itk_component(view)]
1322	set dx [expr ($_click(x) - $x)/double($w)]
1323	set dy [expr ($_click(y) - $y)/double($h)]
1324	set _click(x) $x
1325	set _click(y) $y
1326	set _view(-xpan) [expr $_view(-xpan) - $dx]
1327	set _view(-ypan) [expr $_view(-ypan) - $dy]
1328	PanCamera
1329	}
1330	"release" {
1331	Pan drag $x $y
1332	$itk_component(view) configure -cursor ""
1333	}
1334	default {
1335	error "unknown option \"$option\": should set, click, drag, or release"
1336	}
1337	}
1338	}
1339
1340	# ----------------------------------------------------------------------
1341	# USAGE: InitSettings <what> ?<value>?
1342	#
1343	# Used internally to update rendering settings whenever parameters
1344	# change in the popup settings panel. Sends the new settings off
1345	# to the back end.
1346	# ----------------------------------------------------------------------
1347	itcl::body Rappture::VtkVolumeViewer::InitSettings { args } {
1348	foreach spec $args {
1349	if { [info exists _settings($_first${spec})] } {
1350	# Reset global setting with dataobj specific setting
1351	set _settings($spec) $_settings($_first${spec})
1352	}
1353	AdjustSetting $spec
1354	}
1355	}
1356
1357	#
1358	# AdjustSetting --
1359	#
1360	# Changes/updates a specific setting in the widget. There are
1361	# usually user-setable option. Commands are sent to the render
1362	# server.
1363	#
1364	itcl::body Rappture::VtkVolumeViewer::AdjustSetting {what {value ""}} {
1365	if { ![isconnected] } {
1366	if { $_reset } {
1367	# Just reconnect if we've been reset.
1368	Connect
1369	}
1370	return
1371	}
1372	switch -- $what {
1373	"-current" {
1374	set cname [$itk_component(volcomponents) value]
1375	SwitchComponent $cname
1376	}
1377	"-background" {
1378	set bgcolor [$itk_component(background) value]
1379	set _settings(${what}) $bgcolor
1380	array set fgcolors {
1381	"black" "white"
1382	"white" "black"
1383	"grey" "black"
1384	}
1385	configure -plotbackground $bgcolor \
1386	-plotforeground $fgcolors($bgcolor)
1387	$itk_component(view) delete "legend"
1388	DrawLegend
1389	}
1390	"-volumeoutline" {
1391	set bool $_settings(${what})
1392	SendCmd "outline visible 0"
1393	foreach tag [GetDatasetsWithComponent $_current] {
1394	SendCmd "outline visible $bool $tag"
1395	}
1396	}
1397	"-legendvisible" {
1398	set bool $_settings(${what})
1399	set _settings($_current${what}) $bool
1400	if { $bool } {
1401	blt::table $itk_component(plotarea) \
1402	1,0 $itk_component(legend) -fill x
1403	} else {
1404	blt::table forget $itk_component(legend)
1405	}
1406	}
1407	"-volumevisible" {
1408	set bool $_settings(${what})
1409	set _settings($_current${what}) $bool
1410	# Only the data objects in the array _obj2ovride(*-raise) are
1411	# in the working set and can be displayed on screen. The global
1412	# volume control determines whether they are visible.
1413	#
1414	# Note: The use of the current component is a hold over from
1415	# nanovis. If we can't display more than one volume,
1416	# we don't have to limit the effects to a specific
1417	# component.
1418	foreach tag [GetDatasetsWithComponent $_current] {
1419	foreach {dataobj cname} [split $tag -] break
1420	if { [info exists _obj2ovride($dataobj-raise)] } {
1421	SendCmd "volume visible $bool $tag"
1422	}
1423	}
1424	if { $bool } {
1425	Rappture::Tooltip::for $itk_component(volume) \
1426	"Hide the volume"
1427	} else {
1428	Rappture::Tooltip::for $itk_component(volume) \
1429	"Show the volume"
1430	}
1431	}
1432	"-volumeblendmode" {
1433	set val [$itk_component(blendmode) value]
1434	set mode [$itk_component(blendmode) translate $val]
1435	set _settings(${what}) $mode
1436	set _settings($_current${what}) $mode
1437	foreach tag [GetDatasetsWithComponent $_current] {
1438	SendCmd "volume blendmode $mode $tag"
1439	}
1440	}
1441	"-volumeambient" {
1442	# Other parts of the code use the -volumeambient setting to
1443	# tell if the component settings have been initialized
1444	if { ![info exists _settings($_current${what})] } {
1445	InitComponentSettings $_current
1446	}
1447	set val $_settings(${what})
1448	set _settings($_current${what}) $val
1449	set ambient [expr {0.01*$val}]
1450	foreach tag [GetDatasetsWithComponent $_current] {
1451	SendCmd "volume shading ambient $ambient $tag"
1452	}
1453	}
1454	"-volumediffuse" {
1455	set val $_settings(${what})
1456	set _settings($_current${what}) $val
1457	set diffuse [expr {0.01*$val}]
1458	foreach tag [GetDatasetsWithComponent $_current] {
1459	SendCmd "volume shading diffuse $diffuse $tag"
1460	}
1461	}
1462	"-volumespecularlevel" - "-volumespecularexponent" {
1463	set val $_settings(${what})
1464	set _settings($_current${what}) $val
1465	set level [expr {0.01*$val}]
1466	set exp $_settings(${what})
1467	foreach tag [GetDatasetsWithComponent $_current] {
1468	SendCmd "volume shading specular $level $exp $tag"
1469	}
1470	}
1471	"-volumelighting" {
1472	set bool $_settings($what)
1473	set _settings($_current{$what}) $bool
1474	foreach tag [GetDatasetsWithComponent $_current] {
1475	SendCmd "volume lighting $bool $tag"
1476	}
1477	}
1478	"-volumeopacity" {
1479	set val $_settings(${what})
1480	set _settings($_current${what}) $val
1481	set val [expr {0.01*$val}]
1482	foreach tag [GetDatasetsWithComponent $_current] {
1483	SendCmd "volume opacity $val $tag"
1484	}
1485	}
1486	"-volumequality" {
1487	set val $_settings(${what})
1488	set _settings($_current${what}) $val
1489	set val [expr {0.01*$val}]
1490	foreach tag [GetDatasetsWithComponent $_current] {
1491	SendCmd "volume quality $val $tag"
1492	}
1493	}
1494	"-axesvisible" {
1495	set bool $_settings(${what})
1496	SendCmd "axis visible all $bool"
1497	}
1498	"-axislabelsvisible" {
1499	set bool $_settings(${what})
1500	SendCmd "axis labels all $bool"
1501	}
1502	"-xgridvisible" - "-ygridvisible" - "-zgridvisible" {
1503	set axis [string tolower [string range $what 1 1 ]]
1504	set bool $_settings(${what})
1505	SendCmd "axis grid $axis $bool"
1506	}
1507	"-axisflymode" {
1508	set mode [$itk_component(axismode) value]
1509	set mode [$itk_component(axismode) translate $mode]
1510	set _settings(${what}) $mode
1511	SendCmd "axis flymode $mode"
1512	}
1513	"-cutplanesvisible" {
1514	set bool $_settings(${what})
1515	foreach dataset [CurrentDatasets -visible] {
1516	SendCmd "$_cutplaneCmd visible $bool $dataset"
1517	}
1518	}
1519	"-cutplanelighting" {
1520	set bool $_settings(${what})
1521	foreach dataset [CurrentDatasets -visible] {
1522	if {$_cutplaneCmd != "imgcutplane"} {
1523	SendCmd "$_cutplaneCmd lighting $bool $dataset"
1524	} else {
1525	if {$bool} {
1526	set ambient 0.0
1527	set diffuse 1.0
1528	} else {
1529	set ambient 1.0
1530	set diffuse 0.0
1531	}
1532	SendCmd "imgcutplane material $ambient $diffuse $dataset"
1533	}
1534	}
1535	}
1536	"-cutplaneopacity" {
1537	set val $_settings(${what})
1538	set sval [expr { 0.01 * double($val) }]
1539	foreach dataset [CurrentDatasets -visible] {
1540	SendCmd "$_cutplaneCmd opacity $sval $dataset"
1541	}
1542	}
1543	"-xcutplanevisible" - "-ycutplanevisible" - "-zcutplanevisible" {
1544	set axis [string tolower [string range $what 1 1]]
1545	set bool $_settings(${what})
1546	if { $bool } {
1547	$itk_component(${axis}CutScale) configure -state normal \
1548	-troughcolor white
1549	} else {
1550	$itk_component(${axis}CutScale) configure -state disabled \
1551	-troughcolor grey82
1552	}
1553	foreach dataset [CurrentDatasets -visible] {
1554	SendCmd "$_cutplaneCmd axis $axis $bool $dataset"
1555	}
1556	}
1557	"-xcutplaneposition" - "-ycutplaneposition" - "-zcutplaneposition" {
1558	set axis [string tolower [string range $what 1 1]]
1559	set pos [expr $_settings(${what}) * 0.01]
1560	foreach dataset [CurrentDatasets -visible] {
1561	SendCmd "$_cutplaneCmd slice ${axis} ${pos} $dataset"
1562	}
1563	set _cutplanePending 0
1564	}
1565	"-volumethickness" {
1566	set _settings($_current${what}) $_settings(${what})
1567	updateTransferFunctions
1568	}
1569	"-color" {
1570	set color [$itk_component(colormap) value]
1571	set _settings(${what}) $color
1572	set _settings($_current${what}) $color
1573	ResetColormap $_current $color
1574	}
1575	"-field" {
1576	set label [$itk_component(field) value]
1577	set fname [$itk_component(field) translate $label]
1578	set _settings(${what}) $fname
1579	if { [info exists _fields($fname)] } {
1580	foreach { label units components } $_fields($fname) break
1581	if { !$_allowMultiComponent && $components > 1 } {
1582	puts stderr "Can't use a vector field in a volume"
1583	return
1584	}
1585	set _curFldName $fname
1586	set _curFldLabel $label
1587	} else {
1588	puts stderr "unknown field \"$fname\""
1589	return
1590	}
1591	foreach dataset [CurrentDatasets -visible $_first] {
1592	SendCmd "dataset scalar $_curFldName $dataset"
1593	}
1594	SendCmd "camera reset"
1595	DrawLegend
1596	}
1597	default {
1598	error "don't know how to fix $what"
1599	}
1600	}
1601	}
1602
1603	#
1604	# RequestLegend --
1605	#
1606	# Request a new legend from the server. The size of the legend
1607	# is determined from the height of the canvas.
1608	#
1609	itcl::body Rappture::VtkVolumeViewer::RequestLegend {} {
1610	set _legendPending 0
1611	set font "Arial 8"
1612	set lineht [font metrics $itk_option(-font) -linespace]
1613	set c $itk_component(legend)
1614	set w [winfo width $c]
1615	set h [winfo height $c]
1616	set h [expr {$h-$lineht-20}]
1617	set w [expr {$w-20}]
1618	# Set the legend on the first volume dataset.
1619	foreach dataset [CurrentDatasets -visible $_first] {
1620	foreach {dataobj comp} [split $dataset -] break
1621	if { [info exists _dataset2style($dataset)] } {
1622	SendCmdNoWait \
1623	"legend2 $_dataset2style($dataset) $w $h"
1624	#"legend $_dataset2style($dataset) scalar $_curFldName {} $w $h 0"
1625	break;
1626	}
1627	}
1628	}
1629
1630	# ----------------------------------------------------------------------
1631	# CONFIGURATION OPTION: -plotbackground
1632	# ----------------------------------------------------------------------
1633	itcl::configbody Rappture::VtkVolumeViewer::plotbackground {
1634	if { [isconnected] } {
1635	set color $itk_option(-plotbackground)
1636	set rgb [Color2RGB $color]
1637	SendCmd "screen bgcolor $rgb"
1638	$itk_component(legend) configure -background $color
1639	}
1640	}
1641
1642	# ----------------------------------------------------------------------
1643	# CONFIGURATION OPTION: -plotforeground
1644	# ----------------------------------------------------------------------
1645	itcl::configbody Rappture::VtkVolumeViewer::plotforeground {
1646	if { [isconnected] } {
1647	set color $itk_option(-plotforeground)
1648	set rgb [Color2RGB $color]
1649	SendCmd "axis color all $rgb"
1650	SendCmd "outline color $rgb"
1651	SendCmd "cutplane color $rgb"
1652	$itk_component(legend) itemconfigure labels -fill $color
1653	$itk_component(legend) itemconfigure limits -fill $color
1654	}
1655	}
1656
1657	itcl::body Rappture::VtkVolumeViewer::BuildViewTab {} {
1658
1659	set fg [option get $itk_component(hull) font Font]
1660	#set bfg [option get $itk_component(hull) boldFont Font]
1661
1662	set inner [$itk_component(main) insert end \
1663	-title "View Settings" \
1664	-icon [Rappture::icon wrench]]
1665	$inner configure -borderwidth 4
1666
1667	checkbutton $inner.axes \
1668	-text "Axes" \
1669	-variable [itcl::scope _settings(-axesvisible)] \
1670	-command [itcl::code $this AdjustSetting -axesvisible] \
1671	-font "Arial 9"
1672
1673	checkbutton $inner.outline \
1674	-text "Outline" \
1675	-variable [itcl::scope _settings(-volumeoutline)] \
1676	-command [itcl::code $this AdjustSetting -volumeoutline] \
1677	-font "Arial 9"
1678
1679	checkbutton $inner.legend \
1680	-text "Legend" \
1681	-variable [itcl::scope _settings(-legendvisible)] \
1682	-command [itcl::code $this AdjustSetting -legendvisible] \
1683	-font "Arial 9"
1684
1685	checkbutton $inner.volume \
1686	-text "Volume" \
1687	-variable [itcl::scope _settings(-volumevisible)] \
1688	-command [itcl::code $this AdjustSetting -volumevisible] \
1689	-font "Arial 9"
1690
1691	label $inner.background_l -text "Background" -font "Arial 9"
1692	itk_component add background {
1693	Rappture::Combobox $inner.background -width 10 -editable no
1694	}
1695	$inner.background choices insert end \
1696	"black" "black" \
1697	"white" "white" \
1698	"grey" "grey"
1699
1700	$itk_component(background) value $_settings(-background)
1701	bind $inner.background <<Value>> \
1702	[itcl::code $this AdjustSetting -background]
1703
1704	blt::table $inner \
1705	0,0 $inner.axes -cspan 2 -anchor w \
1706	1,0 $inner.outline -cspan 2 -anchor w \
1707	2,0 $inner.volume -cspan 2 -anchor w \
1708	3,0 $inner.legend -cspan 2 -anchor w \
1709	4,0 $inner.background_l -anchor e -pady 2 \
1710	4,1 $inner.background -fill x \
1711
1712	blt::table configure $inner r* -resize none
1713	blt::table configure $inner r5 -resize expand
1714	}
1715
1716	itcl::body Rappture::VtkVolumeViewer::BuildVolumeTab {} {
1717	set font [option get $itk_component(hull) font Font]
1718	#set bfont [option get $itk_component(hull) boldFont Font]
1719
1720	set inner [$itk_component(main) insert end \
1721	-title "Volume Settings" \
1722	-icon [Rappture::icon volume-on]]
1723	$inner configure -borderwidth 4
1724
1725	label $inner.volcomponents_l -text "Component" -font $font
1726	itk_component add volcomponents {
1727	Rappture::Combobox $inner.volcomponents -editable no
1728	}
1729	bind $inner.volcomponents <<Value>> \
1730	[itcl::code $this AdjustSetting -current]
1731
1732	checkbutton $inner.visibility \
1733	-text "Visible" \
1734	-font $font \
1735	-variable [itcl::scope _settings(-volumevisible)] \
1736	-command [itcl::code $this AdjustSetting -volumevisible]
1737
1738	label $inner.lighting_l \
1739	-text "Lighting / Material Properties" \
1740	-font "Arial 9 bold"
1741
1742	checkbutton $inner.lighting \
1743	-text "Enable Lighting" \
1744	-font $font \
1745	-variable [itcl::scope _settings(-volumelighting)] \
1746	-command [itcl::code $this AdjustSetting -volumelighting]
1747
1748	label $inner.ambient_l \
1749	-text "Ambient" \
1750	-font $font
1751	::scale $inner.ambient -from 0 -to 100 -orient horizontal \
1752	-variable [itcl::scope _settings(-volumeambient)] \
1753	-showvalue off \
1754	-command [itcl::code $this AdjustSetting -volumeambient] \
1755	-troughcolor grey92
1756
1757	label $inner.diffuse_l -text "Diffuse" -font $font
1758	::scale $inner.diffuse -from 0 -to 100 -orient horizontal \
1759	-variable [itcl::scope _settings(-volumediffuse)] \
1760	-showvalue off \
1761	-command [itcl::code $this AdjustSetting -volumediffuse] \
1762	-troughcolor grey92
1763
1764	label $inner.specularLevel_l -text "Specular" -font $font
1765	::scale $inner.specularLevel -from 0 -to 100 -orient horizontal \
1766	-variable [itcl::scope _settings(-volumespecularlevel)] \
1767	-showvalue off \
1768	-command [itcl::code $this AdjustSetting -volumespecularlevel] \
1769	-troughcolor grey92
1770
1771	label $inner.specularExponent_l -text "Shininess" -font $font
1772	::scale $inner.specularExponent -from 10 -to 128 -orient horizontal \
1773	-variable [itcl::scope _settings(-volumespecularexponent)] \
1774	-showvalue off \
1775	-command [itcl::code $this AdjustSetting -volumespecularexponent] \
1776	-troughcolor grey92
1777
1778	label $inner.opacity_l -text "Opacity" -font $font
1779	::scale $inner.opacity -from 0 -to 100 -orient horizontal \
1780	-variable [itcl::scope _settings(-volumeopacity)] \
1781	-showvalue off \
1782	-command [itcl::code $this AdjustSetting -volumeopacity] \
1783	-troughcolor grey92
1784
1785	label $inner.quality_l -text "Quality" -font $font
1786	::scale $inner.quality -from 0 -to 100 -orient horizontal \
1787	-variable [itcl::scope _settings(-volumequality)] \
1788	-showvalue off \
1789	-command [itcl::code $this AdjustSetting -volumequality] \
1790	-troughcolor grey92
1791
1792	label $inner.field_l -text "Field" -font $font
1793	itk_component add field {
1794	Rappture::Combobox $inner.field -editable no
1795	}
1796	bind $inner.field <<Value>> \
1797	[itcl::code $this AdjustSetting -field]
1798
1799	label $inner.transferfunction_l \
1800	-text "Transfer Function" -font "Arial 9 bold"
1801
1802	label $inner.thin -text "Thin" -font $font
1803	::scale $inner.thickness -from 0 -to 1000 -orient horizontal \
1804	-variable [itcl::scope _settings(-volumethickness)] \
1805	-showvalue off \
1806	-command [itcl::code $this AdjustSetting -volumethickness] \
1807	-troughcolor grey92
1808
1809	label $inner.thick -text "Thick" -font $font
1810	$inner.thickness set $_settings(-volumethickness)
1811
1812	label $inner.colormap_l -text "Colormap" -font $font
1813	itk_component add colormap {
1814	Rappture::Combobox $inner.colormap -width 10 -editable no
1815	}
1816	$inner.colormap choices insert end [GetColormapList -includeDefault]
1817
1818	bind $inner.colormap <<Value>> \
1819	[itcl::code $this AdjustSetting -color]
1820	$itk_component(colormap) value "default"
1821	set _settings(-color) "default"
1822
1823	label $inner.blendmode_l -text "Blend Mode" -font $font
1824	itk_component add blendmode {
1825	Rappture::Combobox $inner.blendmode -editable no
1826	}
1827	$inner.blendmode choices insert end \
1828	"composite" "Composite" \
1829	"max_intensity" "Maximum Intensity" \
1830	"additive" "Additive"
1831
1832	$itk_component(blendmode) value \
1833	"[$itk_component(blendmode) label $_settings(-volumeblendmode)]"
1834	bind $inner.blendmode <<Value>> \
1835	[itcl::code $this AdjustSetting -volumeblendmode]
1836
1837	blt::table $inner \
1838	0,0 $inner.volcomponents_l -anchor e -cspan 2 \
1839	0,2 $inner.volcomponents -cspan 3 -fill x \
1840	1,0 $inner.field_l -anchor e -cspan 2 \
1841	1,2 $inner.field -cspan 3 -fill x \
1842	2,0 $inner.lighting_l -anchor w -cspan 4 \
1843	3,1 $inner.lighting -anchor w -cspan 3 \
1844	4,1 $inner.ambient_l -anchor e -pady 2 \
1845	4,2 $inner.ambient -cspan 3 -fill x \
1846	5,1 $inner.diffuse_l -anchor e -pady 2 \
1847	5,2 $inner.diffuse -cspan 3 -fill x \
1848	6,1 $inner.specularLevel_l -anchor e -pady 2 \
1849	6,2 $inner.specularLevel -cspan 3 -fill x \
1850	7,1 $inner.specularExponent_l -anchor e -pady 2 \
1851	7,2 $inner.specularExponent -cspan 3 -fill x \
1852	8,1 $inner.visibility -anchor w -cspan 3 \
1853	9,1 $inner.quality_l -anchor e -pady 2 \
1854	9,2 $inner.quality -cspan 3 -fill x \
1855	10,0 $inner.transferfunction_l -anchor w -cspan 4 \
1856	11,1 $inner.opacity_l -anchor e -pady 2 \
1857	11,2 $inner.opacity -cspan 3 -fill x \
1858	12,1 $inner.colormap_l -anchor e \
1859	12,2 $inner.colormap -padx 2 -cspan 3 -fill x \
1860	13,1 $inner.blendmode_l -anchor e \
1861	13,2 $inner.blendmode -padx 2 -cspan 3 -fill x \
1862	14,1 $inner.thin -anchor e \
1863	14,2 $inner.thickness -cspan 2 -fill x \
1864	14,4 $inner.thick -anchor w
1865
1866	blt::table configure $inner r* c* -resize none
1867	blt::table configure $inner r* -pady { 2 0 }
1868	blt::table configure $inner c2 c3 r15 -resize expand
1869	blt::table configure $inner c0 -width .1i
1870	}
1871
1872	itcl::body Rappture::VtkVolumeViewer::BuildAxisTab {} {
1873
1874	set fg [option get $itk_component(hull) font Font]
1875	#set bfg [option get $itk_component(hull) boldFont Font]
1876
1877	set inner [$itk_component(main) insert end \
1878	-title "Axis Settings" \
1879	-icon [Rappture::icon axis1]]
1880	$inner configure -borderwidth 4
1881
1882	checkbutton $inner.visible \
1883	-text "Show Axes" \
1884	-variable [itcl::scope _settings(-axesvisible)] \
1885	-command [itcl::code $this AdjustSetting -axesvisible] \
1886	-font "Arial 9"
1887
1888	checkbutton $inner.labels \
1889	-text "Show Axis Labels" \
1890	-variable [itcl::scope _settings(-axislabelsvisible)] \
1891	-command [itcl::code $this AdjustSetting -axislabelsvisible] \
1892	-font "Arial 9"
1893
1894	checkbutton $inner.gridx \
1895	-text "Show X Grid" \
1896	-variable [itcl::scope _settings(-xgridvisible)] \
1897	-command [itcl::code $this AdjustSetting -xgridvisible] \
1898	-font "Arial 9"
1899	checkbutton $inner.gridy \
1900	-text "Show Y Grid" \
1901	-variable [itcl::scope _settings(-ygridvisible)] \
1902	-command [itcl::code $this AdjustSetting -ygridvisible] \
1903	-font "Arial 9"
1904	checkbutton $inner.gridz \
1905	-text "Show Z Grid" \
1906	-variable [itcl::scope _settings(-zgridvisible)] \
1907	-command [itcl::code $this AdjustSetting -zgridvisible] \
1908	-font "Arial 9"
1909
1910	label $inner.mode_l -text "Mode" -font "Arial 9"
1911
1912	itk_component add axismode {
1913	Rappture::Combobox $inner.mode -width 10 -editable no
1914	}
1915	$inner.mode choices insert end \
1916	"static_triad" "static" \
1917	"closest_triad" "closest" \
1918	"furthest_triad" "farthest" \
1919	"outer_edges" "outer"
1920	$itk_component(axismode) value "static"
1921	bind $inner.mode <<Value>> [itcl::code $this AdjustSetting -axisflymode]
1922
1923	blt::table $inner \
1924	0,0 $inner.visible -anchor w -cspan 2 \
1925	1,0 $inner.labels -anchor w -cspan 2 \
1926	2,0 $inner.gridx -anchor w -cspan 2 \
1927	3,0 $inner.gridy -anchor w -cspan 2 \
1928	4,0 $inner.gridz -anchor w -cspan 2 \
1929	5,0 $inner.mode_l -anchor w -cspan 2 -padx { 2 0 } \
1930	6,0 $inner.mode -fill x -cspan 2
1931
1932	blt::table configure $inner r* c* -resize none
1933	blt::table configure $inner r7 c1 -resize expand
1934	}
1935
1936
1937	itcl::body Rappture::VtkVolumeViewer::BuildCameraTab {} {
1938	set inner [$itk_component(main) insert end \
1939	-title "Camera Settings" \
1940	-icon [Rappture::icon camera]]
1941	$inner configure -borderwidth 4
1942
1943	label $inner.view_l -text "view" -font "Arial 9"
1944	set f [frame $inner.view]
1945	foreach side { front back left right top bottom } {
1946	button $f.$side -image [Rappture::icon view$side] \
1947	-command [itcl::code $this SetOrientation $side]
1948	Rappture::Tooltip::for $f.$side "Change the view to $side"
1949	pack $f.$side -side left
1950	}
1951	blt::table $inner \
1952	0,0 $inner.view_l -anchor e -pady 2 \
1953	0,1 $inner.view -anchor w -pady 2
1954
1955	set row 1
1956	set labels { qx qy qz qw xpan ypan zoom }
1957	foreach tag $labels {
1958	label $inner.${tag}-label -text $tag -font "Arial 9"
1959	entry $inner.${tag} -font "Arial 9" -bg white \
1960	-textvariable [itcl::scope _view(-$tag)]
1961	bind $inner.${tag} <Return> \
1962	[itcl::code $this camera set -${tag}]
1963	bind $inner.${tag} <KP_Enter> \
1964	[itcl::code $this camera set -${tag}]
1965	blt::table $inner \
1966	$row,0 $inner.${tag}-label -anchor e -pady 2 \
1967	$row,1 $inner.${tag} -anchor w -pady 2
1968	blt::table configure $inner r$row -resize none
1969	incr row
1970	}
1971	checkbutton $inner.ortho \
1972	-text "Orthographic Projection" \
1973	-variable [itcl::scope _view(-ortho)] \
1974	-command [itcl::code $this camera set -ortho] \
1975	-font "Arial 9"
1976	blt::table $inner \
1977	$row,0 $inner.ortho -cspan 2 -anchor w -pady 2
1978	blt::table configure $inner r$row -resize none
1979	incr row
1980
1981	blt::table configure $inner r* c0 c1 -resize none
1982	blt::table configure $inner c2 -resize expand
1983	blt::table configure $inner r$row -resize expand
1984	}
1985
1986	itcl::body Rappture::VtkVolumeViewer::BuildCutplaneTab {} {
1987
1988	set fg [option get $itk_component(hull) font Font]
1989
1990	set inner [$itk_component(main) insert end \
1991	-title "Cutplane Settings" \
1992	-icon [Rappture::icon cutbutton]]
1993
1994	$inner configure -borderwidth 4
1995
1996	checkbutton $inner.visible \
1997	-text "Show Cutplanes" \
1998	-variable [itcl::scope _settings(-cutplanesvisible)] \
1999	-command [itcl::code $this AdjustSetting -cutplanesvisible] \
2000	-font "Arial 9"
2001
2002	checkbutton $inner.lighting \
2003	-text "Enable Lighting" \
2004	-variable [itcl::scope _settings(-cutplanelighting)] \
2005	-command [itcl::code $this AdjustSetting -cutplanelighting] \
2006	-font "Arial 9"
2007
2008	label $inner.opacity_l -text "Opacity" -font "Arial 9"
2009	::scale $inner.opacity -from 0 -to 100 -orient horizontal \
2010	-variable [itcl::scope _settings(-cutplaneopacity)] \
2011	-width 10 \
2012	-showvalue off \
2013	-command [itcl::code $this AdjustSetting -cutplaneopacity]
2014	$inner.opacity set $_settings(-cutplaneopacity)
2015
2016	# X-value slicer...
2017	itk_component add xCutButton {
2018	Rappture::PushButton $inner.xbutton \
2019	-onimage [Rappture::icon x-cutplane] \
2020	-offimage [Rappture::icon x-cutplane] \
2021	-command [itcl::code $this AdjustSetting -xcutplanevisible] \
2022	-variable [itcl::scope _settings(-xcutplanevisible)]
2023	}
2024	Rappture::Tooltip::for $itk_component(xCutButton) \
2025	"Toggle the X-axis cutplane on/off"
2026	$itk_component(xCutButton) select
2027
2028	itk_component add xCutScale {
2029	::scale $inner.xval -from 100 -to 0 \
2030	-width 10 -orient vertical -showvalue yes \
2031	-borderwidth 1 -highlightthickness 0 \
2032	-command [itcl::code $this EventuallySetCutplane x] \
2033	-variable [itcl::scope _settings(-xcutplaneposition)]
2034	} {
2035	usual
2036	ignore -borderwidth -highlightthickness
2037	}
2038	# Set the default cutplane value before disabling the scale.
2039	$itk_component(xCutScale) set 50
2040	$itk_component(xCutScale) configure -state disabled
2041	Rappture::Tooltip::for $itk_component(xCutScale) \
2042	"@[itcl::code $this Slice tooltip x]"
2043
2044	# Y-value slicer...
2045	itk_component add yCutButton {
2046	Rappture::PushButton $inner.ybutton \
2047	-onimage [Rappture::icon y-cutplane] \
2048	-offimage [Rappture::icon y-cutplane] \
2049	-command [itcl::code $this AdjustSetting -ycutplanevisible] \
2050	-variable [itcl::scope _settings(-ycutplanevisible)]
2051	}
2052	Rappture::Tooltip::for $itk_component(yCutButton) \
2053	"Toggle the Y-axis cutplane on/off"
2054	$itk_component(yCutButton) select
2055
2056	itk_component add yCutScale {
2057	::scale $inner.yval -from 100 -to 0 \
2058	-width 10 -orient vertical -showvalue yes \
2059	-borderwidth 1 -highlightthickness 0 \
2060	-command [itcl::code $this EventuallySetCutplane y] \
2061	-variable [itcl::scope _settings(-ycutplaneposition)]
2062	} {
2063	usual
2064	ignore -borderwidth -highlightthickness
2065	}
2066	Rappture::Tooltip::for $itk_component(yCutScale) \
2067	"@[itcl::code $this Slice tooltip y]"
2068	# Set the default cutplane value before disabling the scale.
2069	$itk_component(yCutScale) set 50
2070	$itk_component(yCutScale) configure -state disabled
2071
2072	# Z-value slicer...
2073	itk_component add zCutButton {
2074	Rappture::PushButton $inner.zbutton \
2075	-onimage [Rappture::icon z-cutplane] \
2076	-offimage [Rappture::icon z-cutplane] \
2077	-command [itcl::code $this AdjustSetting -zcutplanevisible] \
2078	-variable [itcl::scope _settings(-zcutplanevisible)]
2079	}
2080	Rappture::Tooltip::for $itk_component(zCutButton) \
2081	"Toggle the Z-axis cutplane on/off"
2082	$itk_component(zCutButton) select
2083
2084	itk_component add zCutScale {
2085	::scale $inner.zval -from 100 -to 0 \
2086	-width 10 -orient vertical -showvalue yes \
2087	-borderwidth 1 -highlightthickness 0 \
2088	-command [itcl::code $this EventuallySetCutplane z] \
2089	-variable [itcl::scope _settings(-zcutplaneposition)]
2090	} {
2091	usual
2092	ignore -borderwidth -highlightthickness
2093	}
2094	$itk_component(zCutScale) set 50
2095	$itk_component(zCutScale) configure -state disabled
2096	Rappture::Tooltip::for $itk_component(zCutScale) \
2097	"@[itcl::code $this Slice tooltip z]"
2098
2099	blt::table $inner \
2100	0,0 $inner.visible -anchor w -pady 2 -cspan 4 \
2101	1,0 $inner.lighting -anchor w -pady 2 -cspan 4 \
2102	2,0 $inner.opacity_l -anchor w -pady 2 -cspan 3 \
2103	3,0 $inner.opacity -fill x -pady 2 -cspan 3 \
2104	4,0 $itk_component(xCutButton) -anchor e -padx 2 -pady 2 \
2105	5,0 $itk_component(xCutScale) -fill y \
2106	4,1 $itk_component(yCutButton) -anchor e -padx 2 -pady 2 \
2107	5,1 $itk_component(yCutScale) -fill y \
2108	4,2 $itk_component(zCutButton) -anchor e -padx 2 -pady 2 \
2109	5,2 $itk_component(zCutScale) -fill y \
2110
2111	blt::table configure $inner r* c* -resize none
2112	blt::table configure $inner r5 c3 -resize expand
2113	}
2114
2115	#
2116	# camera --
2117	#
2118	itcl::body Rappture::VtkVolumeViewer::camera {option args} {
2119	switch -- $option {
2120	"show" {
2121	puts [array get _view]
2122	}
2123	"set" {
2124	set who [lindex $args 0]
2125	set x $_view($who)
2126	set code [catch { string is double $x } result]
2127	if { $code != 0 \|\| !$result } {
2128	return
2129	}
2130	switch -- $who {
2131	"-ortho" {
2132	if {$_view(-ortho)} {
2133	SendCmd "camera mode ortho"
2134	} else {
2135	SendCmd "camera mode persp"
2136	}
2137	}
2138	"-xpan" - "-ypan" {
2139	PanCamera
2140	}
2141	"-qx" - "-qy" - "-qz" - "-qw" {
2142	set q [ViewToQuaternion]
2143	$_arcball quaternion $q
2144	EventuallyRotate $q
2145	}
2146	"-zoom" {
2147	SendCmd "camera zoom $_view(-zoom)"
2148	}
2149	}
2150	}
2151	}
2152	}
2153
2154	itcl::body Rappture::VtkVolumeViewer::GetVtkData { args } {
2155	set bytes ""
2156	foreach dataobj [get] {
2157	foreach comp [$dataobj components] {
2158	set tag $dataobj-$comp
2159	set contents [$dataobj vtkdata $comp]
2160	append bytes "$contents\n"
2161	}
2162	}
2163	return [list .vtk $bytes]
2164	}
2165
2166	itcl::body Rappture::VtkVolumeViewer::GetImage { args } {
2167	if { [image width $_image(download)] > 0 &&
2168	[image height $_image(download)] > 0 } {
2169	set bytes [$_image(download) data -format "jpeg -quality 100"]
2170	set bytes [Rappture::encoding::decode -as b64 $bytes]
2171	return [list .jpg $bytes]
2172	}
2173	return ""
2174	}
2175
2176	itcl::body Rappture::VtkVolumeViewer::BuildDownloadPopup { popup command } {
2177	Rappture::Balloon $popup \
2178	-title "[Rappture::filexfer::label downloadWord] as..."
2179	set inner [$popup component inner]
2180	label $inner.summary -text "" -anchor w
2181	radiobutton $inner.vtk_button -text "VTK data file" \
2182	-variable [itcl::scope _downloadPopup(format)] \
2183	-font "Helvetica 9 " \
2184	-value vtk
2185	Rappture::Tooltip::for $inner.vtk_button "Save as VTK data file."
2186	radiobutton $inner.image_button -text "Image File" \
2187	-variable [itcl::scope _downloadPopup(format)] \
2188	-value image
2189	Rappture::Tooltip::for $inner.image_button \
2190	"Save as digital image."
2191
2192	button $inner.ok -text "Save" \
2193	-highlightthickness 0 -pady 2 -padx 3 \
2194	-command $command \
2195	-compound left \
2196	-image [Rappture::icon download]
2197
2198	button $inner.cancel -text "Cancel" \
2199	-highlightthickness 0 -pady 2 -padx 3 \
2200	-command [list $popup deactivate] \
2201	-compound left \
2202	-image [Rappture::icon cancel]
2203
2204	blt::table $inner \
2205	0,0 $inner.summary -cspan 2 \
2206	1,0 $inner.vtk_button -anchor w -cspan 2 -padx { 4 0 } \
2207	2,0 $inner.image_button -anchor w -cspan 2 -padx { 4 0 } \
2208	4,1 $inner.cancel -width .9i -fill y \
2209	4,0 $inner.ok -padx 2 -width .9i -fill y
2210	blt::table configure $inner r3 -height 4
2211	blt::table configure $inner r4 -pady 4
2212	raise $inner.image_button
2213	$inner.vtk_button invoke
2214	return $inner
2215	}
2216
2217	itcl::body Rappture::VtkVolumeViewer::SetObjectStyle { dataobj cname } {
2218	# Parse style string.
2219	set tag $dataobj-$cname
2220	array set styles {
2221	-color BCGYR
2222	-volumelighting 1
2223	-volumeoutline 0
2224	-volumevisible 1
2225	}
2226	array set styles [$dataobj style $cname]
2227	SendCmd "volume add $tag"
2228	set _settings($cname-volumelighting) $styles(-volumelighting)
2229	set _settings($cname-volumeoutline) $styles(-volumeoutline)
2230	set _settings($cname-volumevisible) $styles(-volumevisible)
2231
2232	$itk_component(colormap) value $styles(-color)
2233
2234	SendCmd "$_cutplaneCmd add $tag"
2235	SendCmd "$_cutplaneCmd visible 0 $tag"
2236	SendCmd "volume lighting $styles(-volumelighting) $tag"
2237	SetInitialTransferFunction $dataobj $cname
2238	SendCmd "volume colormap $cname $tag"
2239	SendCmd "$_cutplaneCmd colormap $cname-opaque $tag"
2240	SendCmd "outline add $tag"
2241	SendCmd "outline visible $styles(-volumeoutline) $tag"
2242	}
2243
2244	itcl::body Rappture::VtkVolumeViewer::IsValidObject { dataobj } {
2245	if {[catch {$dataobj isa Rappture::Field} valid] != 0 \|\| !$valid} {
2246	return 0
2247	}
2248	return 1
2249	}
2250
2251	# ----------------------------------------------------------------------
2252	# USAGE: ReceiveLegend <colormap> <title> <vmin> <vmax> <size>
2253	#
2254	# Invoked automatically whenever the "legend" command comes in from
2255	# the rendering server. Indicates that binary image data with the
2256	# specified <size> will follow.
2257	# ----------------------------------------------------------------------
2258	itcl::body Rappture::VtkVolumeViewer::ReceiveLegend { colormap title vmin vmax size } {
2259	if { [isconnected] } {
2260	set bytes [ReceiveBytes $size]
2261	if { ![info exists _image(legend)] } {
2262	set _image(legend) [image create photo]
2263	}
2264	$_image(legend) configure -data $bytes
2265	#puts stderr "read $size bytes for [image width $_image(legend)]x[image height $_image(legend)] legend>"
2266	if { [catch {DrawLegend} errs] != 0 } {
2267	puts stderr errs=$errs
2268	}
2269	}
2270	}
2271
2272	#
2273	# DrawLegend --
2274	#
2275	itcl::body Rappture::VtkVolumeViewer::DrawLegend {} {
2276	if { $_current == "" } {
2277	set _current "component"
2278	}
2279	set cname $_current
2280	set c $itk_component(legend)
2281	set w [winfo width $c]
2282	set h [winfo height $c]
2283	set lx 10
2284	set ly [expr {$h - 1}]
2285	if {"" == [$c find withtag colorbar]} {
2286	$c create image 10 10 -anchor nw \
2287	-image $_image(legend) -tags colorbar
2288	$c create text $lx $ly -anchor sw \
2289	-fill $itk_option(-plotforeground) -tags "limits text vmin"
2290	$c create text [expr {$w-$lx}] $ly -anchor se \
2291	-fill $itk_option(-plotforeground) -tags "limits text vmax"
2292	$c create text [expr {$w/2}] $ly -anchor s \
2293	-fill $itk_option(-plotforeground) -tags "limits text title"
2294	$c lower colorbar
2295	$c bind colorbar <ButtonRelease-1> [itcl::code $this AddNewMarker %x %y]
2296	}
2297
2298	# Display the markers used by the current transfer function.
2299	HideAllMarkers
2300	if { [info exists _transferFunctionEditors($cname)] } {
2301	$_transferFunctionEditors($cname) showMarkers $_limits($cname)
2302	}
2303
2304	foreach {min max} $_limits($cname) break
2305	$c itemconfigure vmin -text [format %.2g $min]
2306	$c coords vmin $lx $ly
2307
2308	$c itemconfigure vmax -text [format %.2g $max]
2309	$c coords vmax [expr {$w-$lx}] $ly
2310
2311	set title ""
2312	if { $_first != "" } {
2313	set title [$_first hints label]
2314	set units [$_first hints units]
2315	if { $units != "" } {
2316	set title "$title ($units)"
2317	}
2318	}
2319	$c itemconfigure title -text $title
2320	$c coords title [expr {$w/2}] $ly
2321	}
2322
2323	#
2324	# DrawLegendOld --
2325	#
2326	# Draws the legend in it's own canvas which resides to the right
2327	# of the contour plot area.
2328	#
2329	itcl::body Rappture::VtkVolumeViewer::DrawLegendOld { } {
2330	set fname $_curFldName
2331	set c $itk_component(view)
2332	set w [winfo width $c]
2333	set h [winfo height $c]
2334	set font "Arial 8"
2335	set lineht [font metrics $font -linespace]
2336
2337	if { [info exists _fields($fname)] } {
2338	foreach { title units } $_fields($fname) break
2339	if { $units != "" } {
2340	set title [format "%s (%s)" $title $units]
2341	}
2342	} else {
2343	set title $fname
2344	}
2345	if { $_settings(-legendvisible) } {
2346	set x [expr $w - 2]
2347	if { [$c find withtag "legend"] == "" } {
2348	set y 2
2349	$c create text $x $y \
2350	-anchor ne \
2351	-fill $itk_option(-plotforeground) -tags "title legend" \
2352	-font $font
2353	incr y $lineht
2354	$c create text $x $y \
2355	-anchor ne \
2356	-fill $itk_option(-plotforeground) -tags "vmax legend" \
2357	-font $font
2358	incr y $lineht
2359	$c create image $x $y \
2360	-anchor ne \
2361	-image $_image(legend) -tags "colormap legend"
2362	$c create text $x [expr {$h-2}] \
2363	-anchor se \
2364	-fill $itk_option(-plotforeground) -tags "vmin legend" \
2365	-font $font
2366	#$c bind colormap <Enter> [itcl::code $this EnterLegend %x %y]
2367	$c bind colormap <Leave> [itcl::code $this LeaveLegend]
2368	$c bind colormap <Motion> [itcl::code $this MotionLegend %x %y]
2369	}
2370	$c bind title <ButtonPress> [itcl::code $this Combo post]
2371	$c bind title <Enter> [itcl::code $this Combo activate]
2372	$c bind title <Leave> [itcl::code $this Combo deactivate]
2373	# Reset the item coordinates according the current size of the plot.
2374	$c itemconfigure title -text $title
2375	if { [info exists _limits($_curFldName)] } {
2376	foreach { vmin vmax } $_limits($_curFldName) break
2377	$c itemconfigure vmin -text [format %g $vmin]
2378	$c itemconfigure vmax -text [format %g $vmax]
2379	}
2380	set y 2
2381	$c coords title $x $y
2382	incr y $lineht
2383	$c coords vmax $x $y
2384	incr y $lineht
2385	$c coords colormap $x $y
2386	$c coords vmin $x [expr {$h - 2}]
2387	}
2388	}
2389
2390	#
2391	# EnterLegend --
2392	#
2393	itcl::body Rappture::VtkVolumeViewer::EnterLegend { x y } {
2394	SetLegendTip $x $y
2395	}
2396
2397	#
2398	# MotionLegend --
2399	#
2400	itcl::body Rappture::VtkVolumeViewer::MotionLegend { x y } {
2401	Rappture::Tooltip::tooltip cancel
2402	set c $itk_component(view)
2403	SetLegendTip $x $y
2404	}
2405
2406	#
2407	# LeaveLegend --
2408	#
2409	itcl::body Rappture::VtkVolumeViewer::LeaveLegend { } {
2410	Rappture::Tooltip::tooltip cancel
2411	.rappturetooltip configure -icon ""
2412	}
2413
2414	#
2415	# SetLegendTip --
2416	#
2417	itcl::body Rappture::VtkVolumeViewer::SetLegendTip { x y } {
2418	set c $itk_component(view)
2419	set w [winfo width $c]
2420	set h [winfo height $c]
2421	set font "Arial 8"
2422	set lineht [font metrics $font -linespace]
2423
2424	set imgHeight [image height $_image(legend)]
2425	set coords [$c coords colormap]
2426	set imgX [expr $w - [image width $_image(legend)] - 2]
2427	set imgY [expr $y - 2 * ($lineht + 2)]
2428
2429	if { [info exists _fields($_title)] } {
2430	foreach { title units } $_fields($_title) break
2431	if { $units != "" } {
2432	set title [format "%s (%s)" $title $units]
2433	}
2434	} else {
2435	set title $_title
2436	}
2437	# Make a swatch of the selected color
2438	if { [catch { $_image(legend) get 10 $imgY } pixel] != 0 } {
2439	#puts stderr "out of range: $imgY"
2440	return
2441	}
2442	if { ![info exists _image(swatch)] } {
2443	set _image(swatch) [image create photo -width 24 -height 24]
2444	}
2445	set color [eval format "\#%02x%02x%02x" $pixel]
2446	$_image(swatch) put black -to 0 0 23 23
2447	$_image(swatch) put $color -to 1 1 22 22
2448	.rappturetooltip configure -icon $_image(swatch)
2449
2450	# Compute the value of the point
2451	if { [info exists _limits($_curFldName)] } {
2452	foreach { vmin vmax } $_limits($_curFldName) break
2453	set t [expr 1.0 - (double($imgY) / double($imgHeight-1))]
2454	set value [expr $t * ($vmax - $vmin) + $vmin]
2455	} else {
2456	set value 0.0
2457	}
2458	set tipx [expr $x + 15]
2459	set tipy [expr $y - 5]
2460	Rappture::Tooltip::text $c "$title $value"
2461	Rappture::Tooltip::tooltip show $c +$tipx,+$tipy
2462	}
2463
2464
2465	# ----------------------------------------------------------------------
2466	# USAGE: Slice move x\|y\|z <newval>
2467	#
2468	# Called automatically when the user drags the slider to move the
2469	# cut plane that slices 3D data. Gets the current value from the
2470	# slider and moves the cut plane to the appropriate point in the
2471	# data set.
2472	# ----------------------------------------------------------------------
2473	itcl::body Rappture::VtkVolumeViewer::Slice {option args} {
2474	switch -- $option {
2475	"move" {
2476	set axis [lindex $args 0]
2477	set newval [lindex $args 1]
2478	if {[llength $args] != 2} {
2479	error "wrong # args: should be \"Slice move x\|y\|z newval\""
2480	}
2481	set newpos [expr {0.01*$newval}]
2482	SendCmd "cutplane slice $axis $newpos"
2483	}
2484	"tooltip" {
2485	set axis [lindex $args 0]
2486	set val [$itk_component(${axis}CutScale) get]
2487	return "Move the [string toupper $axis] cut plane.\nCurrently: $axis = $val%"
2488	}
2489	default {
2490	error "bad option \"$option\": should be axis, move, or tooltip"
2491	}
2492	}
2493	}
2494
2495
2496	# ----------------------------------------------------------------------
2497	# USAGE: _dropdown post
2498	# USAGE: _dropdown unpost
2499	# USAGE: _dropdown select
2500	#
2501	# Used internally to handle the dropdown list for this combobox. The
2502	# post/unpost options are invoked when the list is posted or unposted
2503	# to manage the relief of the controlling button. The select option
2504	# is invoked whenever there is a selection from the list, to assign
2505	# the value back to the gauge.
2506	# ----------------------------------------------------------------------
2507	itcl::body Rappture::VtkVolumeViewer::Combo {option} {
2508	set c $itk_component(view)
2509	switch -- $option {
2510	post {
2511	foreach { x1 y1 x2 y2 } [$c bbox title] break
2512	set x1 [expr [winfo width $itk_component(view)] - [winfo reqwidth $itk_component(fieldmenu)]]
2513	set x [expr $x1 + [winfo rootx $itk_component(view)]]
2514	set y [expr $y2 + [winfo rooty $itk_component(view)]]
2515	tk_popup $itk_component(fieldmenu) $x $y
2516	}
2517	activate {
2518	$c itemconfigure title -fill red
2519	}
2520	deactivate {
2521	$c itemconfigure title -fill white
2522	}
2523	invoke {
2524	$itk_component(field) value _curFldLabel
2525	AdjustSetting field
2526	}
2527	default {
2528	error "bad option \"$option\": should be post, unpost, select"
2529	}
2530	}
2531	}
2532
2533	#
2534	# The -levels option takes a single value that represents the number
2535	# of evenly distributed markers based on the current data range. Each
2536	# marker is a relative value from 0.0 to 1.0.
2537	#
2538	itcl::body Rappture::VtkVolumeViewer::ParseLevelsOption { cname levels } {
2539	set c $itk_component(legend)
2540	set list {}
2541	regsub -all "," $levels " " levels
2542	if {[string is int $levels]} {
2543	for {set i 1} { $i <= $levels } {incr i} {
2544	lappend list [expr {double($i)/($levels+1)}]
2545	}
2546	} else {
2547	foreach x $levels {
2548	lappend list $x
2549	}
2550	}
2551	set _parsedFunction($cname) 1
2552	$_transferFunctionEditors($cname) addMarkers $list
2553	}
2554
2555	#
2556	# The -markers option takes a list of zero or more values (the values
2557	# may be separated either by spaces or commas) that have the following
2558	# format:
2559	#
2560	# N% Percent of current total data range. Converted to
2561	# to a relative value between 0.0 and 1.0.
2562	# N Absolute value of marker. If the marker is outside of
2563	# the current range, it will be displayed on the outer
2564	# edge of the legends, but it range it represents will
2565	# not be seen.
2566	#
2567	itcl::body Rappture::VtkVolumeViewer::ParseMarkersOption { cname markers } {
2568	set c $itk_component(legend)
2569	set list {}
2570	foreach { min max } $_limits($cname) break
2571	regsub -all "," $markers " " markers
2572	foreach marker $markers {
2573	set n [scan $marker "%g%s" value suffix]
2574	if { $n == 2 && $suffix == "%" } {
2575	# $n% : Set relative value (0..1).
2576	lappend list [expr {$value * 0.01}]
2577	} else {
2578	# $n : absolute value, compute relative
2579	lappend list [expr {(double($value)-$min)/($max-$min)]}
2580	}
2581	}
2582	set _parsedFunction($cname) 1
2583	$_transferFunctionEditors($cname) addMarkers $list
2584	}
2585
2586	#
2587	# SetInitialTransferFunction --
2588	#
2589	# Creates a transfer function name based on the <style> settings in the
2590	# library run.xml file. This placeholder will be used later to create
2591	# and send the actual transfer function once the data info has been sent
2592	# to us by the render server. [We won't know the volume limits until the
2593	# server parses the 3D data and sends back the limits via ReceiveData.]
2594	#
2595	itcl::body Rappture::VtkVolumeViewer::SetInitialTransferFunction { dataobj cname } {
2596	set tag $dataobj-$cname
2597	if { ![info exists _cname2transferFunction($cname)] } {
2598	ComputeTransferFunction $cname
2599	}
2600	set _dataset2style($tag) $cname
2601	lappend _style2datasets($cname) $tag
2602
2603	return $cname
2604	}
2605
2606	#
2607	# ComputeTransferFunction --
2608	#
2609	# Computes and sends the transfer function to the render server. It's
2610	# assumed that the volume data limits are known and that the global
2611	# transfer-functions slider values have been set up. Both parts are
2612	# needed to compute the relative value (location) of the marker, and
2613	# the alpha map of the transfer function.
2614	#
2615	itcl::body Rappture::VtkVolumeViewer::ComputeTransferFunction { cname } {
2616
2617	if { ![info exists _transferFunctionEditors($cname)] } {
2618	set _transferFunctionEditors($cname) \
2619	[Rappture::TransferFunctionEditor ::\#auto $itk_component(legend) \
2620	$cname \
2621	-command [itcl::code $this updateTransferFunctions]]
2622	}
2623
2624	# We have to parse the style attributes for a volume using this
2625	# transfer-function once. This sets up the initial isomarkers for the
2626	# transfer function. The user may add/delete markers, so we have to
2627	# maintain a list of markers for each transfer-function. We use the one
2628	# of the volumes (the first in the list) using the transfer-function as a
2629	# reference.
2630
2631	if { ![info exists _parsedFunction($cname)] \|\| ![info exists _cname2transferFunction($cname)] } {
2632	array set styles {
2633	-color BCGYR
2634	-levels 6
2635	-markers ""
2636	}
2637	# Accumulate the style from all the datasets using it.
2638	foreach tag [GetDatasetsWithComponent $cname] {
2639	foreach {dataobj cname} [split [lindex $tag 0] -] break
2640	set option [lindex [$dataobj components -style $cname] 0]
2641	array set styles $option
2642	}
2643	set _settings($cname-color) $styles(-color)
2644	set cmap [ColorsToColormap $styles(-color)]
2645	set _cname2defaultcolormap($cname) $cmap
2646	if { [info exists _transferFunctionEditors($cname)] } {
2647	eval $_transferFunctionEditors($cname) limits $_limits($cname)
2648	}
2649	if { [info exists styles(-markers)] &&
2650	[llength $styles(-markers)] > 0 } {
2651	ParseMarkersOption $cname $styles(-markers)
2652	} else {
2653	ParseLevelsOption $cname $styles(-levels)
2654	}
2655	} else {
2656	foreach {cmap amap} $_cname2transferFunction($cname) break
2657	}
2658
2659	set amap [ComputeAlphamap $cname]
2660	set opaqueAmap "0.0 1.0 1.0 1.0"
2661	set _cname2transferFunction($cname) [list $cmap $amap]
2662	SendCmd [list colormap add $cname $cmap $amap]
2663	SendCmd [list colormap add $cname-opaque $cmap $opaqueAmap]
2664	}
2665
2666	#
2667	# ResetColormap --
2668	#
2669	# Changes only the colormap portion of the transfer function.
2670	#
2671	itcl::body Rappture::VtkVolumeViewer::ResetColormap { cname color } {
2672	# Get the current transfer function
2673	if { ![info exists _cname2transferFunction($cname)] } {
2674	return
2675	}
2676	foreach { cmap amap } $_cname2transferFunction($cname) break
2677	set cmap [GetColormap $cname $color]
2678	set _cname2transferFunction($cname) [list $cmap $amap]
2679	set opaqueAmap "0.0 1.0 1.0 1.0"
2680	SendCmd [list colormap add $cname $cmap $amap]
2681	SendCmd [list colormap add $cname-opaque $cmap $opaqueAmap]
2682	EventuallyRequestLegend
2683	}
2684
2685	# ----------------------------------------------------------------------
2686	# USAGE: updateTransferFunctions
2687	#
2688	# This is called by the transfer function editor whenever the
2689	# transfer function definition changes.
2690	#
2691	# ----------------------------------------------------------------------
2692	itcl::body Rappture::VtkVolumeViewer::updateTransferFunctions {} {
2693	foreach cname [array names _volcomponents] {
2694	ComputeTransferFunction $cname
2695	}
2696	EventuallyRequestLegend
2697	}
2698
2699	itcl::body Rappture::VtkVolumeViewer::AddNewMarker { x y } {
2700	if { ![info exists _transferFunctionEditors($_current)] } {
2701	continue
2702	}
2703	# Add a new marker to the current transfer function
2704	$_transferFunctionEditors($_current) newMarker $x $y normal
2705	}
2706
2707	itcl::body Rappture::VtkVolumeViewer::RemoveMarker { x y } {
2708	if { ![info exists _transferFunctionEditors($_current)] } {
2709	continue
2710	}
2711	# Add a new marker to the current transfer function
2712	$_transferFunctionEditors($_current) deleteMarker $x $y
2713	}
2714
2715	itcl::body Rappture::VtkVolumeViewer::SetOrientation { side } {
2716	array set positions {
2717	front "1 0 0 0"
2718	back "0 0 1 0"
2719	left "0.707107 0 -0.707107 0"
2720	right "0.707107 0 0.707107 0"
2721	top "0.707107 -0.707107 0 0"
2722	bottom "0.707107 0.707107 0 0"
2723	}
2724	foreach name { -qw -qx -qy -qz } value $positions($side) {
2725	set _view($name) $value
2726	}
2727	set q [ViewToQuaternion]
2728	$_arcball quaternion $q
2729	SendCmd "camera orient $q"
2730	SendCmd "camera reset"
2731	set _view(-xpan) 0
2732	set _view(-ypan) 0
2733	set _view(-zoom) 1.0
2734	}
2735
2736	#
2737	# InitComponentSettings --
2738	#
2739	# Initializes the volume settings for a specific component. This
2740	# should match what's used as global settings above. This
2741	# is called the first time we try to switch to a given component
2742	# in SwitchComponent below.
2743	#
2744	itcl::body Rappture::VtkVolumeViewer::InitComponentSettings { cname } {
2745	array set _settings [subst {
2746	$cname-color default
2747	$cname-volumeambient 40
2748	$cname-volumeblendmode composite
2749	$cname-volumediffuse 60
2750	$cname-volumelight2side 1
2751	$cname-volumelighting 1
2752	$cname-volumeopacity 50
2753	$cname-volumeoutline 0
2754	$cname-volumequality 80
2755	$cname-volumespecularexponent 90
2756	$cname-volumespecularlevel 30
2757	$cname-volumethickness 350
2758	$cname-volumevisible 1
2759	}]
2760	}
2761
2762	#
2763	# SwitchComponent --
2764	#
2765	# This is called when the current component is changed by the
2766	# dropdown menu in the volume tab. It synchronizes the global
2767	# volume settings with the settings of the new current component.
2768	#
2769	itcl::body Rappture::VtkVolumeViewer::SwitchComponent { cname } {
2770	if { ![info exists _settings(${cname}-volumeambient)] } {
2771	InitComponentSettings $cname
2772	}
2773	# _settings variables change widgets, except for colormap
2774	foreach name {
2775	-volumeambient
2776	-volumeblendmode
2777	-volumediffuse
2778	-volumelight2side
2779	-volumelighting
2780	-volumeopacity
2781	-volumeoutline
2782	-volumequality
2783	-volumespecularexponent
2784	-volumespecularlevel
2785	-volumethickness
2786	-volumevisible
2787	} {
2788	set _settings($name) $_settings(${cname}${name})
2789	}
2790	$itk_component(colormap) value $_settings($cname-color)
2791	set _current $cname; # Reset the current component
2792	}
2793
2794	itcl::body Rappture::VtkVolumeViewer::ComputeAlphamap { cname } {
2795	if { ![info exists _transferFunctionEditors($cname)] } {
2796	return [list 0.0 0.0 1.0 1.0]
2797	}
2798	if { ![info exists _settings($cname-volumeambient)] } {
2799	InitComponentSettings $cname
2800	}
2801
2802	set isovalues [$_transferFunctionEditors($cname) values]
2803
2804	# Currently using volume opacity to scale opacity in
2805	# the volume shader. The transfer function always sets full
2806	# opacity
2807	set max 1.0;
2808
2809	# Use the component-wise thickness setting from the slider
2810	# settings widget
2811	# Scale values between 0.00001 and 0.01000
2812	set delta [expr {double($_settings($cname-volumethickness)) * 0.0001}]
2813	set first [lindex $isovalues 0]
2814	set last [lindex $isovalues end]
2815	set amap ""
2816	if { $first == "" \|\| $first != 0.0 } {
2817	lappend amap 0.0 0.0
2818	}
2819	foreach x $isovalues {
2820	set x1 [expr {$x-$delta-0.00001}]
2821	set x2 [expr {$x-$delta}]
2822	set x3 [expr {$x+$delta}]
2823	set x4 [expr {$x+$delta+0.00001}]
2824	if { $x1 < 0.0 } {
2825	set x1 0.0
2826	} elseif { $x1 > 1.0 } {
2827	set x1 1.0
2828	}
2829	if { $x2 < 0.0 } {
2830	set x2 0.0
2831	} elseif { $x2 > 1.0 } {
2832	set x2 1.0
2833	}
2834	if { $x3 < 0.0 } {
2835	set x3 0.0
2836	} elseif { $x3 > 1.0 } {
2837	set x3 1.0
2838	}
2839	if { $x4 < 0.0 } {
2840	set x4 0.0
2841	} elseif { $x4 > 1.0 } {
2842	set x4 1.0
2843	}
2844	# add spikes in the middle
2845	lappend amap $x1 0.0
2846	lappend amap $x2 $max
2847	lappend amap $x3 $max
2848	lappend amap $x4 0.0
2849	}
2850	if { $last == "" \|\| $last != 1.0 } {
2851	lappend amap 1.0 0.0
2852	}
2853	return $amap
2854	}
2855
2856	#
2857	# HideAllMarkers --
2858	#
2859	# Hide all the markers in all the transfer functions. Can't simply
2860	# delete and recreate markers from the <style> since the user may
2861	# have create, deleted, or moved markers.
2862	#
2863	itcl::body Rappture::VtkVolumeViewer::HideAllMarkers {} {
2864	foreach cname [array names _transferFunctionEditors] {
2865	$_transferFunctionEditors($cname) hideMarkers
2866	}
2867	}
2868
2869
2870	#
2871	# GetDatasetsWithComponents --
2872	#
2873	# Returns a list of all the datasets (known by the combination of
2874	# their data object and component name) that match the given
2875	# component name. For example, this is used where we want to change
2876	# the settings of volumes that have the current component.
2877	#
2878	itcl::body Rappture::VtkVolumeViewer::GetDatasetsWithComponent { cname } {
2879	if { ![info exists _volcomponents($cname)] } {
2880	return ""
2881	}
2882	return $_volcomponents($cname)
2883	}
2884
2885	#
2886	# BuildVolumeComponents --
2887	#
2888	# This is called from the "scale" method which is called when a
2889	# new dataset is added or deleted. It repopulates the dropdown
2890	# menu of volume component names. It sets the current component
2891	# to the first component in the list (of components found).
2892	# Finally, if there is only one component, don't display the
2893	# label or the combobox in the volume settings tab.
2894	#
2895	itcl::body Rappture::VtkVolumeViewer::BuildVolumeComponents {} {
2896	$itk_component(volcomponents) choices delete 0 end
2897	foreach name $_componentsList {
2898	$itk_component(volcomponents) choices insert end $name $name
2899	}
2900	set _current [lindex $_componentsList 0]
2901	$itk_component(volcomponents) value $_current
2902	set parent [winfo parent $itk_component(volcomponents)]
2903	if { [llength $_componentsList] <= 1 } {
2904	# Unpack the components label and dropdown if there's only one
2905	# component.
2906	blt::table forget $parent.volcomponents_l $parent.volcomponents
2907	} else {
2908	# Pack the components label and dropdown into the table there's
2909	# more than one component to select.
2910	blt::table $parent \
2911	0,0 $parent.volcomponents_l -anchor e -cspan 2 \
2912	0,2 $parent.volcomponents -cspan 3 -fill x
2913	}
2914	}
2915
2916	itcl::body Rappture::VtkVolumeViewer::GetColormap { cname color } {
2917	if { $color == "default" } {
2918	return $_cname2defaultcolormap($cname)
2919	}
2920	return [ColorsToColormap $color]
2921	}

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