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source: trunk/gui/scripts/vtkvolumeviewer.tcl @ 5383

Last change on this file since 5383 was 5383, checked in by ldelgass, 10 years ago
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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 AddNewMarker { x y }
66	private method BuildVolumeComponents {}
67	private method ComputeAlphamap { cname }
68	private method ComputeTransferFunction { cname }
69	private method GetColormap { cname color }
70	private method GetDatasetsWithComponent { cname }
71	private method HideAllMarkers {}
72	private method InitComponentSettings { cname }
73	private method ParseLevelsOption { cname levels }
74	private method ParseMarkersOption { cname markers }
75	private method RemoveMarker { x y }
76	private method ResetColormap { cname color }
77	private method SendTransferFunctions {}
78	private method SetInitialTransferFunction { dataobj cname }
79	private method SwitchComponent { cname }
80
81	private variable _alphamap
82	private variable _current ""; # Currently selected component
83	private variable _volcomponents ; # Array of components found
84	private variable _componentsList ; # List of component names
85	private variable _cname2transferFunction
86	private variable _cname2defaultcolormap
87
88	private variable _parsedFunction
89	private variable _transferFunctionEditors
90
91	# The following methods are only used by this class.
92	private method AdjustSetting {what {value ""}}
93	private method BuildAxisTab {}
94	private method BuildCameraTab {}
95	private method BuildCutplaneTab {}
96	private method BuildDownloadPopup { widget command }
97	private method BuildViewTab {}
98	private method BuildVolumeTab {}
99	private method Combo { option }
100	private method Connect {}
101	private method CurrentDatasets {args}
102	private method Disconnect {}
103	private method DoResize {}
104	private method DoRotate {}
105	private method DrawLegend {}
106	private method EnterLegend { x y }
107	private method EventuallyResize { w h }
108	private method EventuallyRequestLegend {}
109	private method EventuallyRotate { q }
110	private method EventuallySetCutplane { axis args }
111	private method GetImage { args }
112	private method GetVtkData { args }
113	private method InitSettings { args }
114	private method IsValidObject { dataobj }
115	private method LeaveLegend {}
116	private method MotionLegend { x y }
117	private method Pan {option x y}
118	private method PanCamera {}
119	private method Pick {x y}
120	private method QuaternionToView { q } {
121	foreach { _view(-qw) _view(-qx) _view(-qy) _view(-qz) } $q break
122	}
123	private method Rebuild {}
124	private method ReceiveDataset { args }
125	private method ReceiveImage { args }
126	private method ReceiveLegend { colormap title vmin vmax size }
127	private method RequestLegend {}
128	private method Rotate {option x y}
129	private method SetLegendTip { x y }
130	private method SetObjectStyle { dataobj comp }
131	private method SetOrientation { side }
132	private method Slice {option args}
133	private method ViewToQuaternion {} {
134	return [list $_view(-qw) $_view(-qx) $_view(-qy) $_view(-qz)]
135	}
136	private method Zoom {option}
137
138	private variable _arcball ""
139	private variable _dlist ""; # list of data objects
140	private variable _obj2ovride; # maps dataobj => style override
141	private variable _datasets; # contains all the dataobj-component
142	# datasets in the server
143	private variable _colormaps; # contains all the colormaps
144	# in the server.
145	private variable _dataset2style; # maps dataobj-component to transfunc
146
147	private variable _click; # info used for rotate operations
148	private variable _limits; # autoscale min/max for all axes
149	private variable _view; # view params for 3D view
150	private variable _settings
151	private variable _reset 1; # Connection to server has been reset.
152
153	private variable _first ""; # This is the topmost dataset.
154	private variable _start 0
155	private variable _title ""
156
157	private variable _width 0
158	private variable _height 0
159	private variable _resizePending 0
160	private variable _rotatePending 0
161	private variable _cutplanePending 0
162	private variable _legendPending 0
163	private variable _fields
164	private variable _curFldName ""
165	private variable _curFldLabel ""
166	private variable _colorMode "scalar"; # Mode of colormap (vmag or scalar)
167	private variable _cutplaneCmd "imgcutplane"
168	private variable _allowMultiComponent 0
169
170	private common _downloadPopup; # download options from popup
171	private common _hardcopy
172	}
173
174	itk::usual VtkVolumeViewer {
175	keep -background -foreground -cursor -font
176	keep -plotbackground -plotforeground
177	}
178
179	# ----------------------------------------------------------------------
180	# CONSTRUCTOR
181	# ----------------------------------------------------------------------
182	itcl::body Rappture::VtkVolumeViewer::constructor {hostlist args} {
183	set _serverType "vtkvis"
184
185	EnableWaitDialog 900
186
187	# Rebuild event
188	$_dispatcher register !rebuild
189	$_dispatcher dispatch $this !rebuild "[itcl::code $this Rebuild]; list"
190
191	# Resize event
192	$_dispatcher register !resize
193	$_dispatcher dispatch $this !resize "[itcl::code $this DoResize]; list"
194
195	# Rotate event
196	$_dispatcher register !rotate
197	$_dispatcher dispatch $this !rotate "[itcl::code $this DoRotate]; list"
198
199	# Legend event
200	$_dispatcher register !legend
201	$_dispatcher dispatch $this !legend "[itcl::code $this RequestLegend]; list"
202
203	# X-Cutplane event
204	$_dispatcher register !xcutplane
205	$_dispatcher dispatch $this !xcutplane \
206	"[itcl::code $this AdjustSetting -xcutplaneposition]; list"
207
208	# Y-Cutplane event
209	$_dispatcher register !ycutplane
210	$_dispatcher dispatch $this !ycutplane \
211	"[itcl::code $this AdjustSetting -ycutplaneposition]; list"
212
213	# Z-Cutplane event
214	$_dispatcher register !zcutplane
215	$_dispatcher dispatch $this !zcutplane \
216	"[itcl::code $this AdjustSetting -zcutplaneposition]; list"
217
218	#
219	# Populate parser with commands handle incoming requests
220	#
221	$_parser alias image [itcl::code $this ReceiveImage]
222	$_parser alias dataset [itcl::code $this ReceiveDataset]
223	$_parser alias legend [itcl::code $this ReceiveLegend]
224
225	# Initialize the view to some default parameters.
226	array set _view {
227	-ortho 0
228	-qw 0.853553
229	-qx -0.353553
230	-qy 0.353553
231	-qz 0.146447
232	-xpan 0
233	-ypan 0
234	-zoom 1.0
235	}
236	set _arcball [blt::arcball create 100 100]
237	$_arcball quaternion [ViewToQuaternion]
238
239	array set _settings {
240	-axesvisible 1
241	-axisflymode static
242	-axislabels 1
243	-axisminorticks 1
244	-background black
245	-color "default"
246	-cutplanelighting 1
247	-cutplaneopacity 100
248	-cutplanesvisible 0
249	-legendvisible 1
250	-volumeambient 40
251	-volumeblendmode composite
252	-volumediffuse 60
253	-volumelighting 1
254	-volumeopacity 50
255	-volumeoutline 0
256	-volumequality 80
257	-volumespecularexponent 90
258	-volumespecularlevel 30
259	-volumethickness 350
260	-volumevisible 1
261	-xcutplaneposition 50
262	-xcutplanevisible 1
263	-xgrid 0
264	-ycutplaneposition 50
265	-ycutplanevisible 1
266	-ygrid 0
267	-zcutplaneposition 50
268	-zcutplanevisible 1
269	-zgrid 0
270	}
271
272	itk_component add view {
273	canvas $itk_component(plotarea).view \
274	-highlightthickness 0 -borderwidth 0
275	} {
276	usual
277	ignore -highlightthickness -borderwidth -background
278	}
279
280	itk_component add fieldmenu {
281	menu $itk_component(plotarea).menu -bg black -fg white -relief flat \
282	-tearoff no
283	} {
284	usual
285	ignore -background -foreground -relief -tearoff
286	}
287	set c $itk_component(view)
288	bind $c <Configure> [itcl::code $this EventuallyResize %w %h]
289	bind $c <4> [itcl::code $this Zoom in 0.25]
290	bind $c <5> [itcl::code $this Zoom out 0.25]
291	bind $c <KeyPress-Left> [list %W xview scroll 10 units]
292	bind $c <KeyPress-Right> [list %W xview scroll -10 units]
293	bind $c <KeyPress-Up> [list %W yview scroll 10 units]
294	bind $c <KeyPress-Down> [list %W yview scroll -10 units]
295	bind $c <Enter> "focus %W"
296	bind $c <Control-F1> [itcl::code $this ToggleConsole]
297
298	# Fixes the scrollregion in case we go off screen
299	$c configure -scrollregion [$c bbox all]
300
301	set _map(id) [$c create image 0 0 -anchor nw -image $_image(plot)]
302	set _map(cwidth) -1
303	set _map(cheight) -1
304	set _map(zoom) 1.0
305	set _map(original) ""
306
307	set f [$itk_component(main) component controls]
308	itk_component add reset {
309	button $f.reset -borderwidth 1 -padx 1 -pady 1 \
310	-highlightthickness 0 \
311	-image [Rappture::icon reset-view] \
312	-command [itcl::code $this Zoom reset]
313	} {
314	usual
315	ignore -highlightthickness
316	}
317	pack $itk_component(reset) -side top -padx 2 -pady 2
318	Rappture::Tooltip::for $itk_component(reset) "Reset the view to the default zoom level"
319
320	itk_component add zoomin {
321	button $f.zin -borderwidth 1 -padx 1 -pady 1 \
322	-highlightthickness 0 \
323	-image [Rappture::icon zoom-in] \
324	-command [itcl::code $this Zoom in]
325	} {
326	usual
327	ignore -highlightthickness
328	}
329	pack $itk_component(zoomin) -side top -padx 2 -pady 2
330	Rappture::Tooltip::for $itk_component(zoomin) "Zoom in"
331
332	itk_component add zoomout {
333	button $f.zout -borderwidth 1 -padx 1 -pady 1 \
334	-highlightthickness 0 \
335	-image [Rappture::icon zoom-out] \
336	-command [itcl::code $this Zoom out]
337	} {
338	usual
339	ignore -highlightthickness
340	}
341	pack $itk_component(zoomout) -side top -padx 2 -pady 2
342	Rappture::Tooltip::for $itk_component(zoomout) "Zoom out"
343
344	itk_component add volume {
345	Rappture::PushButton $f.volume \
346	-onimage [Rappture::icon volume-on] \
347	-offimage [Rappture::icon volume-off] \
348	-variable [itcl::scope _settings(-volumevisible)] \
349	-command [itcl::code $this AdjustSetting -volumevisible]
350	}
351	$itk_component(volume) select
352	Rappture::Tooltip::for $itk_component(volume) \
353	"Don't display the volume"
354	pack $itk_component(volume) -padx 2 -pady 2
355
356	itk_component add cutplane {
357	Rappture::PushButton $f.cutplane \
358	-onimage [Rappture::icon cutbutton] \
359	-offimage [Rappture::icon cutbutton] \
360	-variable [itcl::scope _settings(-cutplanesvisible)] \
361	-command [itcl::code $this AdjustSetting -cutplanesvisible]
362	}
363	Rappture::Tooltip::for $itk_component(cutplane) \
364	"Show/Hide cutplanes"
365	pack $itk_component(cutplane) -padx 2 -pady 2
366
367	if { [catch {
368	BuildViewTab
369	BuildVolumeTab
370	BuildCutplaneTab
371	BuildAxisTab
372	BuildCameraTab
373	} errs] != 0 } {
374	puts stderr errs=$errs
375	}
376
377	# Legend
378	set _image(legend) [image create photo]
379	itk_component add legend {
380	canvas $itk_component(plotarea).legend -height 50 -highlightthickness 0
381	} {
382	usual
383	ignore -highlightthickness
384	rename -background -plotbackground plotBackground Background
385	}
386	bind $itk_component(legend) <KeyPress-Delete> \
387	[itcl::code $this RemoveMarker %x %y]
388	bind $itk_component(legend) <Enter> \
389	[list focus $itk_component(legend)]
390
391	# Hack around the Tk panewindow. The problem is that the requested
392	# size of the 3d view isn't set until an image is retrieved from
393	# the server. So the panewindow uses the tiny size.
394	set w 10000
395	pack forget $itk_component(view)
396	blt::table $itk_component(plotarea) \
397	0,0 $itk_component(view) -fill both -reqwidth $w \
398	1,0 $itk_component(legend) -fill x
399	blt::table configure $itk_component(plotarea) r1 -resize none
400
401	# Bindings for rotation via mouse
402	bind $itk_component(view) <ButtonPress-1> \
403	[itcl::code $this Rotate click %x %y]
404	bind $itk_component(view) <B1-Motion> \
405	[itcl::code $this Rotate drag %x %y]
406	bind $itk_component(view) <ButtonRelease-1> \
407	[itcl::code $this Rotate release %x %y]
408
409	# Bindings for panning via mouse
410	bind $itk_component(view) <ButtonPress-2> \
411	[itcl::code $this Pan click %x %y]
412	bind $itk_component(view) <B2-Motion> \
413	[itcl::code $this Pan drag %x %y]
414	bind $itk_component(view) <ButtonRelease-2> \
415	[itcl::code $this Pan release %x %y]
416
417	#bind $itk_component(view) <ButtonRelease-3> \
418	# [itcl::code $this Pick %x %y]
419
420	# Bindings for panning via keyboard
421	bind $itk_component(view) <KeyPress-Left> \
422	[itcl::code $this Pan set -10 0]
423	bind $itk_component(view) <KeyPress-Right> \
424	[itcl::code $this Pan set 10 0]
425	bind $itk_component(view) <KeyPress-Up> \
426	[itcl::code $this Pan set 0 -10]
427	bind $itk_component(view) <KeyPress-Down> \
428	[itcl::code $this Pan set 0 10]
429	bind $itk_component(view) <Shift-KeyPress-Left> \
430	[itcl::code $this Pan set -2 0]
431	bind $itk_component(view) <Shift-KeyPress-Right> \
432	[itcl::code $this Pan set 2 0]
433	bind $itk_component(view) <Shift-KeyPress-Up> \
434	[itcl::code $this Pan set 0 -2]
435	bind $itk_component(view) <Shift-KeyPress-Down> \
436	[itcl::code $this Pan set 0 2]
437
438	# Bindings for zoom via keyboard
439	bind $itk_component(view) <KeyPress-Prior> \
440	[itcl::code $this Zoom out]
441	bind $itk_component(view) <KeyPress-Next> \
442	[itcl::code $this Zoom in]
443
444	bind $itk_component(view) <Enter> "focus $itk_component(view)"
445
446	if {[string equal "x11" [tk windowingsystem]]} {
447	# Bindings for zoom via mouse
448	bind $itk_component(view) <4> [itcl::code $this Zoom out]
449	bind $itk_component(view) <5> [itcl::code $this Zoom in]
450	}
451
452	set _image(download) [image create photo]
453
454	eval itk_initialize $args
455	Connect
456	}
457
458	# ----------------------------------------------------------------------
459	# DESTRUCTOR
460	# ----------------------------------------------------------------------
461	itcl::body Rappture::VtkVolumeViewer::destructor {} {
462	Disconnect
463	image delete $_image(plot)
464	image delete $_image(download)
465	catch { blt::arcball destroy $_arcball }
466	}
467
468	itcl::body Rappture::VtkVolumeViewer::DoResize {} {
469	if { $_width < 2 } {
470	set _width 500
471	}
472	if { $_height < 2 } {
473	set _height 500
474	}
475	set _start [clock clicks -milliseconds]
476	SendCmd "screen size $_width $_height"
477
478	EventuallyRequestLegend
479	set _resizePending 0
480	}
481
482	itcl::body Rappture::VtkVolumeViewer::DoRotate {} {
483	SendCmd "camera orient [ViewToQuaternion]"
484	set _rotatePending 0
485	}
486
487	itcl::body Rappture::VtkVolumeViewer::EventuallyResize { w h } {
488	set _width $w
489	set _height $h
490	$_arcball resize $w $h
491	if { !$_resizePending } {
492	set _resizePending 1
493	$_dispatcher event -after 400 !resize
494	}
495	}
496
497	itcl::body Rappture::VtkVolumeViewer::EventuallyRequestLegend {} {
498	if { !$_legendPending } {
499	set _legendPending 1
500	$_dispatcher event -idle !legend
501	}
502	}
503
504	set rotate_delay 100
505
506	itcl::body Rappture::VtkVolumeViewer::EventuallyRotate { q } {
507	QuaternionToView $q
508	if { !$_rotatePending } {
509	set _rotatePending 1
510	global rotate_delay
511	$_dispatcher event -after $rotate_delay !rotate
512	}
513	}
514
515	itcl::body Rappture::VtkVolumeViewer::EventuallySetCutplane { axis args } {
516	if { !$_cutplanePending } {
517	set _cutplanePending 1
518	$_dispatcher event -after 100 !${axis}cutplane
519	}
520	}
521
522	# ----------------------------------------------------------------------
523	# USAGE: add <dataobj> ?<settings>?
524	#
525	# Clients use this to add a data object to the plot. The optional
526	# <settings> are used to configure the plot. Allowed settings are
527	# -color, -brightness, -width, -linestyle, and -raise.
528	# ----------------------------------------------------------------------
529	itcl::body Rappture::VtkVolumeViewer::add {dataobj {settings ""}} {
530	if { ![IsValidObject $dataobj] } {
531	return; # Ignore invalid objects.
532	}
533	array set params {
534	-color auto
535	-width 1
536	-linestyle solid
537	-brightness 0
538	-raise 0
539	-description ""
540	-param ""
541	-type ""
542	}
543	array set params $settings
544	set params(-description) ""
545	set params(-param) ""
546	array set params $settings
547
548	if {$params(-color) == "auto" \|\| $params(-color) == "autoreset"} {
549	# can't handle -autocolors yet
550	set params(-color) black
551	}
552	set pos [lsearch -exact $_dlist $dataobj]
553	if {$pos < 0} {
554	lappend _dlist $dataobj
555	}
556	set _obj2ovride($dataobj-color) $params(-color)
557	set _obj2ovride($dataobj-width) $params(-width)
558	set _obj2ovride($dataobj-raise) $params(-raise)
559	$_dispatcher event -idle !rebuild
560	}
561
562
563	# ----------------------------------------------------------------------
564	# USAGE: delete ?<dataobj1> <dataobj2> ...?
565	#
566	# Clients use this to delete a dataobj from the plot. If no dataobjs
567	# are specified, then all dataobjs are deleted. No data objects are
568	# deleted. They are only removed from the display list.
569	#
570	# ----------------------------------------------------------------------
571	itcl::body Rappture::VtkVolumeViewer::delete {args} {
572	if { [llength $args] == 0} {
573	set args $_dlist
574	}
575	# Delete all specified dataobjs
576	set changed 0
577	foreach dataobj $args {
578	set pos [lsearch -exact $_dlist $dataobj]
579	if { $pos < 0 } {
580	continue; # Don't know anything about it.
581	}
582	# Remove it from the dataobj list.
583	set _dlist [lreplace $_dlist $pos $pos]
584	array unset _obj2ovride $dataobj-*
585	array unset _settings $dataobj-*
586	set changed 1
587	}
588	# If anything changed, then rebuild the plot
589	if { $changed } {
590	$_dispatcher event -idle !rebuild
591	}
592	}
593
594	# ----------------------------------------------------------------------
595	# USAGE: get ?-objects?
596	# USAGE: get ?-visible?
597	# USAGE: get ?-image view?
598	#
599	# Clients use this to query the list of objects being plotted, in
600	# order from bottom to top of this result. The optional "-image"
601	# flag can also request the internal images being shown.
602	# ----------------------------------------------------------------------
603	itcl::body Rappture::VtkVolumeViewer::get {args} {
604	if {[llength $args] == 0} {
605	set args "-objects"
606	}
607
608	set op [lindex $args 0]
609	switch -- $op {
610	"-objects" {
611	# put the dataobj list in order according to -raise options
612	set dlist {}
613	foreach dataobj $_dlist {
614	if { ![IsValidObject $dataobj] } {
615	continue
616	}
617	if {[info exists _obj2ovride($dataobj-raise)] &&
618	$_obj2ovride($dataobj-raise)} {
619	set dlist [linsert $dlist 0 $dataobj]
620	} else {
621	lappend dlist $dataobj
622	}
623	}
624	return $dlist
625	}
626	"-visible" {
627	set dlist {}
628	foreach dataobj $_dlist {
629	if { ![IsValidObject $dataobj] } {
630	continue
631	}
632	if { ![info exists _obj2ovride($dataobj-raise)] } {
633	# No setting indicates that the object isn't visible.
634	continue
635	}
636	# Otherwise use the -raise parameter to put the object to
637	# the front of the list.
638	if { $_obj2ovride($dataobj-raise) } {
639	set dlist [linsert $dlist 0 $dataobj]
640	} else {
641	lappend dlist $dataobj
642	}
643	}
644	return $dlist
645	}
646	-image {
647	if {[llength $args] != 2} {
648	error "wrong # args: should be \"get -image view\""
649	}
650	switch -- [lindex $args end] {
651	view {
652	return $_image(plot)
653	}
654	default {
655	error "bad image name \"[lindex $args end]\": should be view"
656	}
657	}
658	}
659	default {
660	error "bad option \"$op\": should be -objects or -image"
661	}
662	}
663	}
664
665	# ----------------------------------------------------------------------
666	# USAGE: scale ?<data1> <data2> ...?
667	#
668	# Sets the default limits for the overall plot according to the
669	# limits of the data for all of the given <data> objects. This
670	# accounts for all objects--even those not showing on the screen.
671	# Because of this, the limits are appropriate for all objects as
672	# the user scans through data in the ResultSet viewer.
673	# ----------------------------------------------------------------------
674	itcl::body Rappture::VtkVolumeViewer::scale {args} {
675	array unset _limits
676	array unset _volcomponents
677	set _componentsList ""
678
679	foreach dataobj $args {
680	if { ![$dataobj isvalid] } {
681	continue; # Object doesn't contain valid data.
682	}
683	# Determine limits for each axis.
684	foreach axis { x y z } {
685	set lim [$dataobj limits $axis]
686	if { ![info exists _limits($axis)] } {
687	set _limits($axis) $lim
688	continue
689	}
690	foreach {min max} $lim break
691	foreach {amin amax} $_limits($axis) break
692	if { $amin > $min } {
693	set amin $min
694	}
695	if { $amax < $max } {
696	set amax $max
697	}
698	set _limits($axis) [list $amin $amax]
699	}
700	# Determine limits for each field.
701	foreach { fname lim } [$dataobj fieldlimits] {
702	if { ![info exists _limits($fname)] } {
703	set _limits($fname) $lim
704	continue
705	}
706	foreach {min max} $lim break
707	foreach {fmin fmax} $_limits($fname) break
708	if { $fmin > $min } {
709	set fmin $min
710	}
711	if { $fmax < $max } {
712	set fmax $max
713	}
714	set _limits($fname) [list $fmin $fmax]
715	}
716	# Get limits for each component.
717	foreach cname [$dataobj components] {
718	if { ![info exists _volcomponents($cname)] } {
719	lappend _componentsList $cname
720	}
721	lappend _volcomponents($cname) $dataobj-$cname
722	array unset limits
723	array set limits [$dataobj valueLimits $cname]
724	if { ![info exists _limits($cname)] } {
725	set _limits($cname) $limits(v)
726	continue
727	}
728	foreach {min max} $limits(v) break
729	foreach {vmin vmax} $_limits($cname) break
730	if { $vmin > $min } {
731	set vmin $min
732	}
733	if { $vmax < $max } {
734	set vmax $max
735	}
736	set _limits($cname) [list $vmin $vmax]
737	}
738	}
739	BuildVolumeComponents
740	updateTransferFunctions
741	}
742
743	# ----------------------------------------------------------------------
744	# USAGE: download coming
745	# USAGE: download controls <downloadCommand>
746	# USAGE: download now
747	#
748	# Clients use this method to create a downloadable representation
749	# of the plot. Returns a list of the form {ext string}, where
750	# "ext" is the file extension (indicating the type of data) and
751	# "string" is the data itself.
752	# ----------------------------------------------------------------------
753	itcl::body Rappture::VtkVolumeViewer::download {option args} {
754	switch $option {
755	coming {
756	if {[catch {
757	blt::winop snap $itk_component(plotarea) $_image(download)
758	}]} {
759	$_image(download) configure -width 1 -height 1
760	$_image(download) put #000000
761	}
762	}
763	controls {
764	set popup .vtkviewerdownload
765	if { ![winfo exists .vtkviewerdownload] } {
766	set inner [BuildDownloadPopup $popup [lindex $args 0]]
767	} else {
768	set inner [$popup component inner]
769	}
770	set _downloadPopup(image_controls) $inner.image_frame
771	set num [llength [get]]
772	set num [expr {($num == 1) ? "1 result" : "$num results"}]
773	set word [Rappture::filexfer::label downloadWord]
774	$inner.summary configure -text "$word $num in the following format:"
775	update idletasks ;# Fix initial sizes
776	return $popup
777	}
778	now {
779	set popup .vtkviewerdownload
780	if {[winfo exists .vtkviewerdownload]} {
781	$popup deactivate
782	}
783	switch -- $_downloadPopup(format) {
784	"image" {
785	return [$this GetImage [lindex $args 0]]
786	}
787	"vtk" {
788	return [$this GetVtkData [lindex $args 0]]
789	}
790	}
791	return ""
792	}
793	default {
794	error "bad option \"$option\": should be coming, controls, now"
795	}
796	}
797	}
798
799	# ----------------------------------------------------------------------
800	# USAGE: Connect ?<host:port>,<host:port>...?
801	#
802	# Clients use this method to establish a connection to a new
803	# server, or to reestablish a connection to the previous server.
804	# Any existing connection is automatically closed.
805	# ----------------------------------------------------------------------
806	itcl::body Rappture::VtkVolumeViewer::Connect {} {
807	set _hosts [GetServerList "vtkvis"]
808	if { "" == $_hosts } {
809	return 0
810	}
811	set _reset 1
812	set result [VisViewer::Connect $_hosts]
813	if { $result } {
814	if { $_reportClientInfo } {
815	# Tell the server the viewer, hub, user and session.
816	# Do this immediately on connect before buffering any commands
817	global env
818
819	set info {}
820	set user "???"
821	if { [info exists env(USER)] } {
822	set user $env(USER)
823	}
824	set session "???"
825	if { [info exists env(SESSION)] } {
826	set session $env(SESSION)
827	}
828	lappend info "version" "$Rappture::version"
829	lappend info "build" "$Rappture::build"
830	lappend info "svnurl" "$Rappture::svnurl"
831	lappend info "installdir" "$Rappture::installdir"
832	lappend info "hub" [exec hostname]
833	lappend info "client" "vtkvolumeviewer"
834	lappend info "user" $user
835	lappend info "session" $session
836	SendCmd "clientinfo [list $info]"
837	}
838
839	set w [winfo width $itk_component(view)]
840	set h [winfo height $itk_component(view)]
841	EventuallyResize $w $h
842	}
843	return $result
844	}
845
846	#
847	# isconnected --
848	#
849	# Indicates if we are currently connected to the visualization server.
850	#
851	itcl::body Rappture::VtkVolumeViewer::isconnected {} {
852	return [VisViewer::IsConnected]
853	}
854
855	#
856	# disconnect --
857	#
858	itcl::body Rappture::VtkVolumeViewer::disconnect {} {
859	Disconnect
860	}
861
862	#
863	# Disconnect --
864	#
865	# Clients use this method to disconnect from the current rendering
866	# server.
867	#
868	itcl::body Rappture::VtkVolumeViewer::Disconnect {} {
869	VisViewer::Disconnect
870
871	$_dispatcher cancel !rebuild
872	$_dispatcher cancel !resize
873	$_dispatcher cancel !rotate
874	$_dispatcher cancel !xcutplane
875	$_dispatcher cancel !ycutplane
876	$_dispatcher cancel !zcutplane
877	$_dispatcher cancel !legend
878	# disconnected -- no more data sitting on server
879	array unset _datasets
880	array unset _colormaps
881	array unset _dataset2style
882
883	array unset _parsedFunction
884	array unset _cname2transferFunction
885
886	set _resizePending 0
887	set _rotatePending 0
888	set _cutplanePending 0
889	set _legendPending 0
890	}
891
892	# ----------------------------------------------------------------------
893	# USAGE: ReceiveImage -bytes <size> -type <type> -token <token>
894	#
895	# Invoked automatically whenever the "image" command comes in from
896	# the rendering server. Indicates that binary image data with the
897	# specified <size> will follow.
898	# ----------------------------------------------------------------------
899	itcl::body Rappture::VtkVolumeViewer::ReceiveImage { args } {
900	array set info {
901	-token "???"
902	-bytes 0
903	-type image
904	}
905	array set info $args
906	set bytes [ReceiveBytes $info(-bytes)]
907	StopWaiting
908	if { $info(-type) == "image" } {
909	if 0 {
910	set f [open "last.ppm" "w"]
911	fconfigure $f -encoding binary
912	puts -nonewline $f $bytes
913	close $f
914	}
915	$_image(plot) configure -data $bytes
916	#puts stderr "[clock format [clock seconds]]: received image [image width $_image(plot)]x[image height $_image(plot)] image>"
917	if { $_start > 0 } {
918	set finish [clock clicks -milliseconds]
919	#puts stderr "round trip time [expr $finish -$_start] milliseconds"
920	set _start 0
921	}
922	} elseif { $info(type) == "print" } {
923	set tag $this-print-$info(-token)
924	set _hardcopy($tag) $bytes
925	}
926	}
927
928	#
929	# ReceiveDataset --
930	#
931	itcl::body Rappture::VtkVolumeViewer::ReceiveDataset { args } {
932	if { ![isconnected] } {
933	return
934	}
935	set option [lindex $args 0]
936	switch -- $option {
937	"scalar" {
938	set option [lindex $args 1]
939	switch -- $option {
940	"world" {
941	foreach { x y z value tag } [lrange $args 2 end] break
942	}
943	"pixel" {
944	foreach { x y value tag } [lrange $args 2 end] break
945	}
946	}
947	}
948	"vector" {
949	set option [lindex $args 1]
950	switch -- $option {
951	"world" {
952	foreach { x y z vx vy vz tag } [lrange $args 2 end] break
953	}
954	"pixel" {
955	foreach { x y vx vy vz tag } [lrange $args 2 end] break
956	}
957	}
958	}
959	"names" {
960	foreach { name } [lindex $args 1] {
961	#puts stderr "Dataset: $name"
962	}
963	}
964	default {
965	error "unknown dataset option \"$option\" from server"
966	}
967	}
968	}
969
970	# ----------------------------------------------------------------------
971	# USAGE: Rebuild
972	#
973	# Called automatically whenever something changes that affects the
974	# data in the widget. Clears any existing data and rebuilds the
975	# widget to display new data.
976	# ----------------------------------------------------------------------
977	itcl::body Rappture::VtkVolumeViewer::Rebuild {} {
978	set w [winfo width $itk_component(view)]
979	set h [winfo height $itk_component(view)]
980	if { $w < 2 \|\| $h < 2 } {
981	update
982	$_dispatcher event -idle !rebuild
983	return
984	}
985
986	# Turn on buffering of commands to the server. We don't want to
987	# be preempted by a server disconnect/reconnect (which automatically
988	# generates a new call to Rebuild).
989	StartBufferingCommands
990
991	if { $_width != $w \|\| $_height != $h \|\| $_reset } {
992	set _width $w
993	set _height $h
994	$_arcball resize $w $h
995	DoResize
996	}
997	if { $_reset } {
998	#
999	# Reset the camera and other view parameters
1000	#
1001	$_arcball quaternion [ViewToQuaternion]
1002	if {$_view(-ortho)} {
1003	SendCmd "camera mode ortho"
1004	} else {
1005	SendCmd "camera mode persp"
1006	}
1007	DoRotate
1008	PanCamera
1009	set _first ""
1010	InitSettings -background \
1011	-xgrid -ygrid -zgrid -axisflymode \
1012	-axesvisible -axislabels -axisminorticks
1013	StopBufferingCommands
1014	SendCmd "imgflush"
1015	StartBufferingCommands
1016	}
1017	set _first ""
1018
1019	# No volumes are active (i.e. in the working set of displayed volumes).
1020	# A volume is always invisible if it's not in the working set. A
1021	# volume in the working set may be visible/invisible depending upon the
1022	# global visibility value.
1023	SendCmd "dataset visible 0"
1024	foreach dataobj [get -objects] {
1025	if { [info exists _obj2ovride($dataobj-raise)] && $_first == "" } {
1026	set _first $dataobj
1027	}
1028	foreach comp [$dataobj components] {
1029	set tag $dataobj-$comp
1030	if { ![info exists _datasets($tag)] } {
1031	set bytes [$dataobj vtkdata $comp]
1032	if 0 {
1033	set f [open /tmp/vtkvolume.vtk "w"]
1034	fconfigure $f -translation binary -encoding binary
1035	puts -nonewline $f $bytes
1036	close $f
1037	}
1038	set length [string length $bytes]
1039	if { $_reportClientInfo } {
1040	set info {}
1041	lappend info "tool_id" [$dataobj hints toolid]
1042	lappend info "tool_name" [$dataobj hints toolname]
1043	lappend info "tool_title" [$dataobj hints tooltitle]
1044	lappend info "tool_command" [$dataobj hints toolcommand]
1045	lappend info "tool_revision" [$dataobj hints toolrevision]
1046	lappend info "dataset_label" [$dataobj hints label]
1047	lappend info "dataset_size" $length
1048	lappend info "dataset_tag" $tag
1049	SendCmd "clientinfo [list $info]"
1050	}
1051	SendCmd "dataset add $tag data follows $length"
1052	SendData $bytes
1053	set _datasets($tag) 1
1054	SetObjectStyle $dataobj $comp
1055	}
1056	if { [info exists _obj2ovride($dataobj-raise)] } {
1057	SendCmd "volume visible 1 $tag"
1058	}
1059	break
1060	}
1061	}
1062	if {"" != $_first} {
1063	set location [$_first hints camera]
1064	if { $location != "" } {
1065	array set view $location
1066	}
1067
1068	foreach axis { x y z } {
1069	set label [$_first hints ${axis}label]
1070	if { $label != "" } {
1071	SendCmd [list axis name $axis $label]
1072	}
1073	set units [$_first hints ${axis}units]
1074	if { $units != "" } {
1075	SendCmd [list axis units $axis $units]
1076	}
1077	}
1078	$itk_component(field) choices delete 0 end
1079	$itk_component(fieldmenu) delete 0 end
1080	array unset _fields
1081	set _curFldName ""
1082	foreach cname [$_first components] {
1083	foreach fname [$_first fieldnames $cname] {
1084	if { [info exists _fields($fname)] } {
1085	continue
1086	}
1087	foreach { label units components } \
1088	[$_first fieldinfo $fname] break
1089	# Only scalar fields are valid
1090	if {$_allowMultiComponent \|\| $components == 1} {
1091	$itk_component(field) choices insert end "$fname" "$label"
1092	$itk_component(fieldmenu) add radiobutton -label "$label" \
1093	-value $label -variable [itcl::scope _curFldLabel] \
1094	-selectcolor red \
1095	-activebackground $itk_option(-plotbackground) \
1096	-activeforeground $itk_option(-plotforeground) \
1097	-font "Arial 8" \
1098	-command [itcl::code $this Combo invoke]
1099	set _fields($fname) [list $label $units $components]
1100	if { $_curFldName == "" } {
1101	set _curFldName $fname
1102	set _curFldLabel $label
1103	}
1104	}
1105	}
1106	}
1107	$itk_component(field) value $_curFldLabel
1108	}
1109
1110	InitSettings -color \
1111	-volumeambient -volumediffuse -volumespecularlevel \
1112	-volumespecularexponent -volumeblendmode -volumethickness \
1113	-volumelighting -volumeopacity -volumequality -volumeoutline -volumevisible \
1114	-cutplanesvisible \
1115	-xcutplaneposition -ycutplaneposition -zcutplaneposition \
1116	-xcutplanevisible -ycutplanevisible -zcutplanevisible
1117
1118	if { $_reset } {
1119	SendCmd "camera reset"
1120	SendCmd "camera zoom $_view(-zoom)"
1121	RequestLegend
1122	set _reset 0
1123	}
1124	# Actually write the commands to the server socket. If it fails, we don't
1125	# care. We're finished here.
1126	blt::busy hold $itk_component(hull)
1127	StopBufferingCommands
1128	blt::busy release $itk_component(hull)
1129	}
1130
1131	# ----------------------------------------------------------------------
1132	# USAGE: CurrentDatasets ?-all -visible? ?dataobjs?
1133	#
1134	# Returns a list of server IDs for the current datasets being displayed. This
1135	# is normally a single ID, but it might be a list of IDs if the current data
1136	# object has multiple components.
1137	# ----------------------------------------------------------------------
1138	itcl::body Rappture::VtkVolumeViewer::CurrentDatasets {args} {
1139	set flag [lindex $args 0]
1140	switch -- $flag {
1141	"-all" {
1142	if { [llength $args] > 1 } {
1143	error "CurrentDatasets: can't specify dataobj after \"-all\""
1144	}
1145	set dlist [get -objects]
1146	}
1147	"-visible" {
1148	if { [llength $args] > 1 } {
1149	set dlist {}
1150	set args [lrange $args 1 end]
1151	foreach dataobj $args {
1152	if { [info exists _obj2ovride($dataobj-raise)] } {
1153	lappend dlist $dataobj
1154	}
1155	}
1156	} else {
1157	set dlist [get -visible]
1158	}
1159	}
1160	default {
1161	set dlist $args
1162	}
1163	}
1164	set rlist ""
1165	foreach dataobj $dlist {
1166	foreach comp [$dataobj components] {
1167	set tag $dataobj-$comp
1168	if { [info exists _datasets($tag)] && $_datasets($tag) } {
1169	lappend rlist $tag
1170	}
1171	}
1172	}
1173	return $rlist
1174	}
1175
1176	# ----------------------------------------------------------------------
1177	# USAGE: Zoom in
1178	# USAGE: Zoom out
1179	# USAGE: Zoom reset
1180	#
1181	# Called automatically when the user clicks on one of the zoom
1182	# controls for this widget. Changes the zoom for the current view.
1183	# ----------------------------------------------------------------------
1184	itcl::body Rappture::VtkVolumeViewer::Zoom {option} {
1185	switch -- $option {
1186	"in" {
1187	set _view(-zoom) [expr {$_view(-zoom)*1.25}]
1188	SendCmd "camera zoom $_view(-zoom)"
1189	}
1190	"out" {
1191	set _view(-zoom) [expr {$_view(-zoom)*0.8}]
1192	SendCmd "camera zoom $_view(-zoom)"
1193	}
1194	"reset" {
1195	array set _view {
1196	-qw 0.853553
1197	-qx -0.353553
1198	-qy 0.353553
1199	-qz 0.146447
1200	-xpan 0
1201	-ypan 0
1202	-zoom 1.0
1203	}
1204	if { $_first != "" } {
1205	set location [$_first hints camera]
1206	if { $location != "" } {
1207	array set _view $location
1208	}
1209	}
1210	$_arcball quaternion [ViewToQuaternion]
1211	DoRotate
1212	SendCmd "camera reset"
1213	}
1214	}
1215	}
1216
1217	itcl::body Rappture::VtkVolumeViewer::PanCamera {} {
1218	set x $_view(-xpan)
1219	set y $_view(-ypan)
1220	SendCmd "camera pan $x $y"
1221	}
1222
1223	# ----------------------------------------------------------------------
1224	# USAGE: Rotate click <x> <y>
1225	# USAGE: Rotate drag <x> <y>
1226	# USAGE: Rotate release <x> <y>
1227	#
1228	# Called automatically when the user clicks/drags/releases in the
1229	# plot area. Moves the plot according to the user's actions.
1230	# ----------------------------------------------------------------------
1231	itcl::body Rappture::VtkVolumeViewer::Rotate {option x y} {
1232	switch -- $option {
1233	"click" {
1234	$itk_component(view) configure -cursor fleur
1235	set _click(x) $x
1236	set _click(y) $y
1237	}
1238	"drag" {
1239	if {[array size _click] == 0} {
1240	Rotate click $x $y
1241	} else {
1242	set w [winfo width $itk_component(view)]
1243	set h [winfo height $itk_component(view)]
1244	if {$w <= 0 \|\| $h <= 0} {
1245	return
1246	}
1247
1248	if {[catch {
1249	# this fails sometimes for no apparent reason
1250	set dx [expr {double($x-$_click(x))/$w}]
1251	set dy [expr {double($y-$_click(y))/$h}]
1252	}]} {
1253	return
1254	}
1255	if { $dx == 0 && $dy == 0 } {
1256	return
1257	}
1258	set q [$_arcball rotate $x $y $_click(x) $_click(y)]
1259	EventuallyRotate $q
1260	set _click(x) $x
1261	set _click(y) $y
1262	}
1263	}
1264	"release" {
1265	Rotate drag $x $y
1266	$itk_component(view) configure -cursor ""
1267	catch {unset _click}
1268	}
1269	default {
1270	error "bad option \"$option\": should be click, drag, release"
1271	}
1272	}
1273	}
1274
1275	itcl::body Rappture::VtkVolumeViewer::Pick {x y} {
1276	foreach tag [CurrentDatasets -visible] {
1277	SendCmd "dataset getscalar pixel $x $y $tag"
1278	}
1279	}
1280
1281	# ----------------------------------------------------------------------
1282	# USAGE: $this Pan click x y
1283	# $this Pan drag x y
1284	# $this Pan release x y
1285	#
1286	# Called automatically when the user clicks on one of the zoom
1287	# controls for this widget. Changes the zoom for the current view.
1288	# ----------------------------------------------------------------------
1289	itcl::body Rappture::VtkVolumeViewer::Pan {option x y} {
1290	switch -- $option {
1291	"set" {
1292	set w [winfo width $itk_component(view)]
1293	set h [winfo height $itk_component(view)]
1294	set x [expr $x / double($w)]
1295	set y [expr $y / double($h)]
1296	set _view(-xpan) [expr $_view(-xpan) + $x]
1297	set _view(-ypan) [expr $_view(-ypan) + $y]
1298	PanCamera
1299	return
1300	}
1301	"click" {
1302	set _click(x) $x
1303	set _click(y) $y
1304	$itk_component(view) configure -cursor hand1
1305	}
1306	"drag" {
1307	if { ![info exists _click(x)] } {
1308	set _click(x) $x
1309	}
1310	if { ![info exists _click(y)] } {
1311	set _click(y) $y
1312	}
1313	set w [winfo width $itk_component(view)]
1314	set h [winfo height $itk_component(view)]
1315	set dx [expr ($_click(x) - $x)/double($w)]
1316	set dy [expr ($_click(y) - $y)/double($h)]
1317	set _click(x) $x
1318	set _click(y) $y
1319	set _view(-xpan) [expr $_view(-xpan) - $dx]
1320	set _view(-ypan) [expr $_view(-ypan) - $dy]
1321	PanCamera
1322	}
1323	"release" {
1324	Pan drag $x $y
1325	$itk_component(view) configure -cursor ""
1326	}
1327	default {
1328	error "unknown option \"$option\": should set, click, drag, or release"
1329	}
1330	}
1331	}
1332
1333	# ----------------------------------------------------------------------
1334	# USAGE: InitSettings <what> ?<value>?
1335	#
1336	# Used internally to update rendering settings whenever parameters
1337	# change in the popup settings panel. Sends the new settings off
1338	# to the back end.
1339	# ----------------------------------------------------------------------
1340	itcl::body Rappture::VtkVolumeViewer::InitSettings { args } {
1341	foreach spec $args {
1342	if { [info exists _settings($_first${spec})] } {
1343	# Reset global setting with dataobj specific setting
1344	set _settings($spec) $_settings($_first${spec})
1345	}
1346	AdjustSetting $spec
1347	}
1348	}
1349
1350	#
1351	# AdjustSetting --
1352	#
1353	# Changes/updates a specific setting in the widget. There are
1354	# usually user-setable option. Commands are sent to the render
1355	# server.
1356	#
1357	itcl::body Rappture::VtkVolumeViewer::AdjustSetting {what {value ""}} {
1358	if { ![isconnected] } {
1359	return
1360	}
1361	switch -- $what {
1362	"-current" {
1363	set cname [$itk_component(volcomponents) value]
1364	SwitchComponent $cname
1365	}
1366	"-background" {
1367	set bgcolor [$itk_component(background) value]
1368	set _settings($what) $bgcolor
1369	array set fgcolors {
1370	"black" "white"
1371	"white" "black"
1372	"grey" "black"
1373	}
1374	configure -plotbackground $bgcolor \
1375	-plotforeground $fgcolors($bgcolor)
1376	$itk_component(view) delete "legend"
1377	DrawLegend
1378	}
1379	"-volumeoutline" {
1380	set bool $_settings($what)
1381	SendCmd "outline visible 0"
1382	foreach tag [GetDatasetsWithComponent $_current] {
1383	SendCmd "outline visible $bool $tag"
1384	}
1385	}
1386	"-legendvisible" {
1387	set bool $_settings($what)
1388	set _settings($_current${what}) $bool
1389	if { $bool } {
1390	blt::table $itk_component(plotarea) \
1391	1,0 $itk_component(legend) -fill x
1392	} else {
1393	blt::table forget $itk_component(legend)
1394	}
1395	}
1396	"-volumevisible" {
1397	set bool $_settings($what)
1398	set _settings($_current${what}) $bool
1399	# Only the data objects in the array _obj2ovride(*-raise) are
1400	# in the working set and can be displayed on screen. The global
1401	# volume control determines whether they are visible.
1402	#
1403	# Note: The use of the current component is a hold over from
1404	# nanovis. If we can't display more than one volume,
1405	# we don't have to limit the effects to a specific
1406	# component.
1407	foreach tag [GetDatasetsWithComponent $_current] {
1408	foreach {dataobj cname} [split $tag -] break
1409	if { [info exists _obj2ovride($dataobj-raise)] } {
1410	SendCmd "volume visible $bool $tag"
1411	}
1412	}
1413	if { $bool } {
1414	Rappture::Tooltip::for $itk_component(volume) \
1415	"Hide the volume"
1416	} else {
1417	Rappture::Tooltip::for $itk_component(volume) \
1418	"Show the volume"
1419	}
1420	}
1421	"-volumeblendmode" {
1422	set val [$itk_component(blendmode) value]
1423	set mode [$itk_component(blendmode) translate $val]
1424	set _settings($what) $mode
1425	set _settings($_current${what}) $mode
1426	foreach tag [GetDatasetsWithComponent $_current] {
1427	SendCmd "volume blendmode $mode $tag"
1428	}
1429	}
1430	"-volumeambient" {
1431	# Other parts of the code use the -volumeambient setting to
1432	# tell if the component settings have been initialized
1433	if { ![info exists _settings($_current${what})] } {
1434	InitComponentSettings $_current
1435	}
1436	set val $_settings($what)
1437	set _settings($_current${what}) $val
1438	set ambient [expr {0.01*$val}]
1439	foreach tag [GetDatasetsWithComponent $_current] {
1440	SendCmd "volume shading ambient $ambient $tag"
1441	}
1442	}
1443	"-volumediffuse" {
1444	set val $_settings($what)
1445	set _settings($_current${what}) $val
1446	set diffuse [expr {0.01*$val}]
1447	foreach tag [GetDatasetsWithComponent $_current] {
1448	SendCmd "volume shading diffuse $diffuse $tag"
1449	}
1450	}
1451	"-volumespecularlevel" - "-volumespecularexponent" {
1452	set val $_settings($what)
1453	set _settings($_current${what}) $val
1454	set level [expr {0.01*$val}]
1455	set exp $_settings($what)
1456	foreach tag [GetDatasetsWithComponent $_current] {
1457	SendCmd "volume shading specular $level $exp $tag"
1458	}
1459	}
1460	"-volumelighting" {
1461	set bool $_settings($what)
1462	set _settings($_current${what}) $bool
1463	foreach tag [GetDatasetsWithComponent $_current] {
1464	SendCmd "volume lighting $bool $tag"
1465	}
1466	}
1467	"-volumeopacity" {
1468	set val $_settings($what)
1469	set _settings($_current${what}) $val
1470	set val [expr {0.01*$val}]
1471	foreach tag [GetDatasetsWithComponent $_current] {
1472	SendCmd "volume opacity $val $tag"
1473	}
1474	}
1475	"-volumequality" {
1476	set val $_settings($what)
1477	set _settings($_current${what}) $val
1478	set val [expr {0.01*$val}]
1479	foreach tag [GetDatasetsWithComponent $_current] {
1480	SendCmd "volume quality $val $tag"
1481	}
1482	}
1483	"-axesvisible" {
1484	set bool $_settings($what)
1485	SendCmd "axis visible all $bool"
1486	}
1487	"-axislabels" {
1488	set bool $_settings($what)
1489	SendCmd "axis labels all $bool"
1490	}
1491	"-axisminorticks" {
1492	set bool $_settings($what)
1493	SendCmd "axis minticks all $bool"
1494	}
1495	"-xgrid" - "-ygrid" - "-zgrid" {
1496	set axis [string range $what 1 1]
1497	set bool $_settings($what)
1498	SendCmd "axis grid $axis $bool"
1499	}
1500	"-axisflymode" {
1501	set mode [$itk_component(axismode) value]
1502	set mode [$itk_component(axismode) translate $mode]
1503	set _settings($what) $mode
1504	SendCmd "axis flymode $mode"
1505	}
1506	"-cutplanesvisible" {
1507	set bool $_settings($what)
1508	foreach dataset [CurrentDatasets -visible] {
1509	SendCmd "$_cutplaneCmd visible $bool $dataset"
1510	}
1511	}
1512	"-cutplanelighting" {
1513	set bool $_settings($what)
1514	foreach dataset [CurrentDatasets -visible] {
1515	if {$_cutplaneCmd != "imgcutplane"} {
1516	SendCmd "$_cutplaneCmd lighting $bool $dataset"
1517	} else {
1518	if {$bool} {
1519	set ambient 0.0
1520	set diffuse 1.0
1521	} else {
1522	set ambient 1.0
1523	set diffuse 0.0
1524	}
1525	SendCmd "imgcutplane material $ambient $diffuse $dataset"
1526	}
1527	}
1528	}
1529	"-cutplaneopacity" {
1530	set val $_settings($what)
1531	set sval [expr { 0.01 * double($val) }]
1532	foreach dataset [CurrentDatasets -visible] {
1533	SendCmd "$_cutplaneCmd opacity $sval $dataset"
1534	}
1535	}
1536	"-xcutplanevisible" - "-ycutplanevisible" - "-zcutplanevisible" {
1537	set axis [string range $what 1 1]
1538	set bool $_settings($what)
1539	if { $bool } {
1540	$itk_component(${axis}CutScale) configure -state normal \
1541	-troughcolor white
1542	} else {
1543	$itk_component(${axis}CutScale) configure -state disabled \
1544	-troughcolor grey82
1545	}
1546	foreach dataset [CurrentDatasets -visible] {
1547	SendCmd "$_cutplaneCmd axis $axis $bool $dataset"
1548	}
1549	}
1550	"-xcutplaneposition" - "-ycutplaneposition" - "-zcutplaneposition" {
1551	set axis [string range $what 1 1]
1552	set pos [expr $_settings($what) * 0.01]
1553	foreach dataset [CurrentDatasets -visible] {
1554	SendCmd "$_cutplaneCmd slice ${axis} ${pos} $dataset"
1555	}
1556	set _cutplanePending 0
1557	}
1558	"-volumethickness" {
1559	set _settings($_current${what}) $_settings($what)
1560	updateTransferFunctions
1561	}
1562	"-color" {
1563	set color [$itk_component(colormap) value]
1564	set _settings($what) $color
1565	set _settings($_current${what}) $color
1566	ResetColormap $_current $color
1567	}
1568	"-field" {
1569	set label [$itk_component(field) value]
1570	set fname [$itk_component(field) translate $label]
1571	set _settings($what) $fname
1572	if { [info exists _fields($fname)] } {
1573	foreach { label units components } $_fields($fname) break
1574	if { !$_allowMultiComponent && $components > 1 } {
1575	puts stderr "Can't use a vector field in a volume"
1576	return
1577	} else {
1578	if { $components > 1 } {
1579	set _colorMode vmag
1580	} else {
1581	set _colorMode scalar
1582	}
1583	}
1584	set _curFldName $fname
1585	set _curFldLabel $label
1586	} else {
1587	puts stderr "unknown field \"$fname\""
1588	return
1589	}
1590	foreach dataset [CurrentDatasets -visible $_first] {
1591	#SendCmd "$_cutplaneCmd colormode $_colorMode $_curFldName $dataset"
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	#SendCmd "legend $_dataset2style($dataset) $_colorMode $_curFldName {} $w $h 0"
1623	SendCmd "legend2 $_dataset2style($dataset) $w $h"
1624	break;
1625	}
1626	}
1627	}
1628
1629	# ----------------------------------------------------------------------
1630	# CONFIGURATION OPTION: -plotbackground
1631	# ----------------------------------------------------------------------
1632	itcl::configbody Rappture::VtkVolumeViewer::plotbackground {
1633	if { [isconnected] } {
1634	set color $itk_option(-plotbackground)
1635	set rgb [Color2RGB $color]
1636	SendCmd "screen bgcolor $rgb"
1637	$itk_component(legend) configure -background $color
1638	}
1639	}
1640
1641	# ----------------------------------------------------------------------
1642	# CONFIGURATION OPTION: -plotforeground
1643	# ----------------------------------------------------------------------
1644	itcl::configbody Rappture::VtkVolumeViewer::plotforeground {
1645	if { [isconnected] } {
1646	set color $itk_option(-plotforeground)
1647	set rgb [Color2RGB $color]
1648	SendCmd "axis color all $rgb"
1649	SendCmd "outline color $rgb"
1650	SendCmd "$_cutplaneCmd color $rgb"
1651	$itk_component(legend) itemconfigure labels -fill $color
1652	$itk_component(legend) itemconfigure limits -fill $color
1653	}
1654	}
1655
1656	itcl::body Rappture::VtkVolumeViewer::BuildViewTab {} {
1657	set font [option get $itk_component(hull) font Font]
1658
1659	set inner [$itk_component(main) insert end \
1660	-title "View Settings" \
1661	-icon [Rappture::icon wrench]]
1662	$inner configure -borderwidth 4
1663
1664	checkbutton $inner.axes \
1665	-text "Axes" \
1666	-variable [itcl::scope _settings(-axesvisible)] \
1667	-command [itcl::code $this AdjustSetting -axesvisible] \
1668	-font $font
1669
1670	checkbutton $inner.outline \
1671	-text "Outline" \
1672	-variable [itcl::scope _settings(-volumeoutline)] \
1673	-command [itcl::code $this AdjustSetting -volumeoutline] \
1674	-font $font
1675
1676	checkbutton $inner.legend \
1677	-text "Legend" \
1678	-variable [itcl::scope _settings(-legendvisible)] \
1679	-command [itcl::code $this AdjustSetting -legendvisible] \
1680	-font $font
1681
1682	checkbutton $inner.volume \
1683	-text "Volume" \
1684	-variable [itcl::scope _settings(-volumevisible)] \
1685	-command [itcl::code $this AdjustSetting -volumevisible] \
1686	-font $font
1687
1688	label $inner.background_l -text "Background" -font $font
1689	itk_component add background {
1690	Rappture::Combobox $inner.background -width 10 -editable no
1691	}
1692	$inner.background choices insert end \
1693	"black" "black" \
1694	"white" "white" \
1695	"grey" "grey"
1696
1697	$itk_component(background) value $_settings(-background)
1698	bind $inner.background <<Value>> \
1699	[itcl::code $this AdjustSetting -background]
1700
1701	blt::table $inner \
1702	0,0 $inner.axes -cspan 2 -anchor w \
1703	1,0 $inner.outline -cspan 2 -anchor w \
1704	2,0 $inner.volume -cspan 2 -anchor w \
1705	3,0 $inner.legend -cspan 2 -anchor w \
1706	4,0 $inner.background_l -anchor e -pady 2 \
1707	4,1 $inner.background -fill x
1708
1709	blt::table configure $inner r* -resize none
1710	blt::table configure $inner r5 -resize expand
1711	}
1712
1713	itcl::body Rappture::VtkVolumeViewer::BuildVolumeTab {} {
1714	set font [option get $itk_component(hull) font Font]
1715	#set bfont [option get $itk_component(hull) boldFont Font]
1716	set bfont "Arial 9 bold"
1717
1718	set inner [$itk_component(main) insert end \
1719	-title "Volume Settings" \
1720	-icon [Rappture::icon volume-on]]
1721	$inner configure -borderwidth 4
1722
1723	label $inner.volcomponents_l -text "Component" -font $font
1724	itk_component add volcomponents {
1725	Rappture::Combobox $inner.volcomponents -editable no
1726	}
1727	bind $inner.volcomponents <<Value>> \
1728	[itcl::code $this AdjustSetting -current]
1729
1730	checkbutton $inner.visibility \
1731	-text "Visible" \
1732	-font $font \
1733	-variable [itcl::scope _settings(-volumevisible)] \
1734	-command [itcl::code $this AdjustSetting -volumevisible]
1735
1736	label $inner.lighting_l \
1737	-text "Lighting / Material Properties" \
1738	-font $bfont
1739
1740	checkbutton $inner.lighting \
1741	-text "Enable Lighting" \
1742	-font $font \
1743	-variable [itcl::scope _settings(-volumelighting)] \
1744	-command [itcl::code $this AdjustSetting -volumelighting]
1745
1746	label $inner.ambient_l \
1747	-text "Ambient" \
1748	-font $font
1749	::scale $inner.ambient -from 0 -to 100 -orient horizontal \
1750	-variable [itcl::scope _settings(-volumeambient)] \
1751	-showvalue off \
1752	-command [itcl::code $this AdjustSetting -volumeambient] \
1753	-troughcolor grey92
1754
1755	label $inner.diffuse_l -text "Diffuse" -font $font
1756	::scale $inner.diffuse -from 0 -to 100 -orient horizontal \
1757	-variable [itcl::scope _settings(-volumediffuse)] \
1758	-showvalue off \
1759	-command [itcl::code $this AdjustSetting -volumediffuse] \
1760	-troughcolor grey92
1761
1762	label $inner.specularLevel_l -text "Specular" -font $font
1763	::scale $inner.specularLevel -from 0 -to 100 -orient horizontal \
1764	-variable [itcl::scope _settings(-volumespecularlevel)] \
1765	-showvalue off \
1766	-command [itcl::code $this AdjustSetting -volumespecularlevel] \
1767	-troughcolor grey92
1768
1769	label $inner.specularExponent_l -text "Shininess" -font $font
1770	::scale $inner.specularExponent -from 10 -to 128 -orient horizontal \
1771	-variable [itcl::scope _settings(-volumespecularexponent)] \
1772	-showvalue off \
1773	-command [itcl::code $this AdjustSetting -volumespecularexponent] \
1774	-troughcolor grey92
1775
1776	label $inner.opacity_l -text "Opacity" -font $font
1777	::scale $inner.opacity -from 0 -to 100 -orient horizontal \
1778	-variable [itcl::scope _settings(-volumeopacity)] \
1779	-showvalue off \
1780	-command [itcl::code $this AdjustSetting -volumeopacity] \
1781	-troughcolor grey92
1782
1783	label $inner.quality_l -text "Quality" -font $font
1784	::scale $inner.quality -from 0 -to 100 -orient horizontal \
1785	-variable [itcl::scope _settings(-volumequality)] \
1786	-showvalue off \
1787	-command [itcl::code $this AdjustSetting -volumequality] \
1788	-troughcolor grey92
1789
1790	label $inner.field_l -text "Field" -font $font
1791	itk_component add field {
1792	Rappture::Combobox $inner.field -editable no
1793	}
1794	bind $inner.field <<Value>> \
1795	[itcl::code $this AdjustSetting -field]
1796
1797	label $inner.transferfunction_l \
1798	-text "Transfer Function" -font $bfont
1799
1800	label $inner.thin -text "Thin" -font $font
1801	::scale $inner.thickness -from 0 -to 1000 -orient horizontal \
1802	-variable [itcl::scope _settings(-volumethickness)] \
1803	-showvalue off \
1804	-command [itcl::code $this AdjustSetting -volumethickness] \
1805	-troughcolor grey92
1806
1807	label $inner.thick -text "Thick" -font $font
1808	$inner.thickness set $_settings(-volumethickness)
1809
1810	label $inner.colormap_l -text "Colormap" -font $font
1811	itk_component add colormap {
1812	Rappture::Combobox $inner.colormap -width 10 -editable no
1813	}
1814	$inner.colormap choices insert end [GetColormapList -includeDefault]
1815
1816	bind $inner.colormap <<Value>> \
1817	[itcl::code $this AdjustSetting -color]
1818	$itk_component(colormap) value $_settings(-color)
1819
1820	label $inner.blendmode_l -text "Blend Mode" -font $font
1821	itk_component add blendmode {
1822	Rappture::Combobox $inner.blendmode -editable no
1823	}
1824	$inner.blendmode choices insert end \
1825	"composite" "Composite" \
1826	"max_intensity" "Maximum Intensity" \
1827	"additive" "Additive"
1828
1829	$itk_component(blendmode) value \
1830	"[$itk_component(blendmode) label $_settings(-volumeblendmode)]"
1831	bind $inner.blendmode <<Value>> \
1832	[itcl::code $this AdjustSetting -volumeblendmode]
1833
1834	blt::table $inner \
1835	0,0 $inner.volcomponents_l -anchor e -cspan 2 \
1836	0,2 $inner.volcomponents -cspan 3 -fill x \
1837	1,0 $inner.field_l -anchor e -cspan 2 \
1838	1,2 $inner.field -cspan 3 -fill x \
1839	2,0 $inner.lighting_l -anchor w -cspan 4 \
1840	3,1 $inner.lighting -anchor w -cspan 3 \
1841	4,1 $inner.ambient_l -anchor e \
1842	4,2 $inner.ambient -cspan 3 -fill x \
1843	5,1 $inner.diffuse_l -anchor e \
1844	5,2 $inner.diffuse -cspan 3 -fill x \
1845	6,1 $inner.specularLevel_l -anchor e \
1846	6,2 $inner.specularLevel -cspan 3 -fill x \
1847	7,1 $inner.specularExponent_l -anchor e \
1848	7,2 $inner.specularExponent -cspan 3 -fill x \
1849	8,1 $inner.visibility -anchor w -cspan 3 \
1850	9,1 $inner.quality_l -anchor e \
1851	9,2 $inner.quality -cspan 3 -fill x \
1852	10,0 $inner.transferfunction_l -anchor w -cspan 4 \
1853	11,1 $inner.opacity_l -anchor e \
1854	11,2 $inner.opacity -cspan 3 -fill x \
1855	12,1 $inner.colormap_l -anchor e \
1856	12,2 $inner.colormap -padx 2 -cspan 3 -fill x \
1857	13,1 $inner.blendmode_l -anchor e \
1858	13,2 $inner.blendmode -padx 2 -cspan 3 -fill x \
1859	14,1 $inner.thin -anchor e \
1860	14,2 $inner.thickness -cspan 2 -fill x \
1861	14,4 $inner.thick -anchor w
1862
1863	blt::table configure $inner r* c* -resize none
1864	blt::table configure $inner r* -pady { 2 0 }
1865	blt::table configure $inner c2 c3 r15 -resize expand
1866	blt::table configure $inner c0 -width .1i
1867	}
1868
1869	itcl::body Rappture::VtkVolumeViewer::BuildAxisTab {} {
1870	set font [option get $itk_component(hull) font Font]
1871
1872	set inner [$itk_component(main) insert end \
1873	-title "Axis Settings" \
1874	-icon [Rappture::icon axis2]]
1875	$inner configure -borderwidth 4
1876
1877	checkbutton $inner.visible \
1878	-text "Axes" \
1879	-variable [itcl::scope _settings(-axesvisible)] \
1880	-command [itcl::code $this AdjustSetting -axesvisible] \
1881	-font $font
1882
1883	checkbutton $inner.labels \
1884	-text "Axis Labels" \
1885	-variable [itcl::scope _settings(-axislabels)] \
1886	-command [itcl::code $this AdjustSetting -axislabels] \
1887	-font $font
1888	label $inner.grid_l -text "Grid" -font $font
1889	checkbutton $inner.xgrid \
1890	-text "X" \
1891	-variable [itcl::scope _settings(-xgrid)] \
1892	-command [itcl::code $this AdjustSetting -xgrid] \
1893	-font $font
1894	checkbutton $inner.ygrid \
1895	-text "Y" \
1896	-variable [itcl::scope _settings(-ygrid)] \
1897	-command [itcl::code $this AdjustSetting -ygrid] \
1898	-font $font
1899	checkbutton $inner.zgrid \
1900	-text "Z" \
1901	-variable [itcl::scope _settings(-zgrid)] \
1902	-command [itcl::code $this AdjustSetting -zgrid] \
1903	-font $font
1904	checkbutton $inner.minorticks \
1905	-text "Minor Ticks" \
1906	-variable [itcl::scope _settings(-axisminorticks)] \
1907	-command [itcl::code $this AdjustSetting -axisminorticks] \
1908	-font $font
1909
1910	label $inner.mode_l -text "Mode" -font $font
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 $_settings(-axisflymode)
1921	bind $inner.mode <<Value>> [itcl::code $this AdjustSetting -axisflymode]
1922
1923	blt::table $inner \
1924	0,0 $inner.visible -anchor w -cspan 4 \
1925	1,0 $inner.labels -anchor w -cspan 4 \
1926	2,0 $inner.minorticks -anchor w -cspan 4 \
1927	4,0 $inner.grid_l -anchor w \
1928	4,1 $inner.xgrid -anchor w \
1929	4,2 $inner.ygrid -anchor w \
1930	4,3 $inner.zgrid -anchor w \
1931	5,0 $inner.mode_l -anchor w -padx { 2 0 } \
1932	5,1 $inner.mode -fill x -cspan 3
1933
1934	blt::table configure $inner r* c* -resize none
1935	blt::table configure $inner r7 c6 -resize expand
1936	blt::table configure $inner r3 -height 0.125i
1937	}
1938
1939	itcl::body Rappture::VtkVolumeViewer::BuildCameraTab {} {
1940	set font [option get $itk_component(hull) font Font]
1941	set inner [$itk_component(main) insert end \
1942	-title "Camera Settings" \
1943	-icon [Rappture::icon camera]]
1944	$inner configure -borderwidth 4
1945
1946	label $inner.view_l -text "view" -font $font
1947	set f [frame $inner.view]
1948	foreach side { front back left right top bottom } {
1949	button $f.$side -image [Rappture::icon view$side] \
1950	-command [itcl::code $this SetOrientation $side]
1951	Rappture::Tooltip::for $f.$side "Change the view to $side"
1952	pack $f.$side -side left
1953	}
1954	blt::table $inner \
1955	0,0 $inner.view_l -anchor e -pady 2 \
1956	0,1 $inner.view -anchor w -pady 2
1957	blt::table configure $inner r0 -resize none
1958
1959	set row 1
1960	set labels { qx qy qz qw xpan ypan zoom }
1961	foreach tag $labels {
1962	label $inner.${tag}label -text $tag -font $font
1963	entry $inner.${tag} -font $font -bg white \
1964	-textvariable [itcl::scope _view(-$tag)]
1965	bind $inner.${tag} <Return> \
1966	[itcl::code $this camera set -${tag}]
1967	bind $inner.${tag} <KP_Enter> \
1968	[itcl::code $this camera set -${tag}]
1969	blt::table $inner \
1970	$row,0 $inner.${tag}label -anchor e -pady 2 \
1971	$row,1 $inner.${tag} -anchor w -pady 2
1972	blt::table configure $inner r$row -resize none
1973	incr row
1974	}
1975	checkbutton $inner.ortho \
1976	-text "Orthographic Projection" \
1977	-variable [itcl::scope _view(-ortho)] \
1978	-command [itcl::code $this camera set -ortho] \
1979	-font $font
1980	blt::table $inner \
1981	$row,0 $inner.ortho -cspan 2 -anchor w -pady 2
1982	blt::table configure $inner r$row -resize none
1983	incr row
1984
1985	blt::table configure $inner c0 c1 -resize none
1986	blt::table configure $inner c2 -resize expand
1987	blt::table configure $inner r$row -resize expand
1988	}
1989
1990	itcl::body Rappture::VtkVolumeViewer::BuildCutplaneTab {} {
1991	set font [option get $itk_component(hull) font Font]
1992
1993	set inner [$itk_component(main) insert end \
1994	-title "Cutplane Settings" \
1995	-icon [Rappture::icon cutbutton]]
1996
1997	$inner configure -borderwidth 4
1998
1999	checkbutton $inner.visible \
2000	-text "Show Cutplanes" \
2001	-variable [itcl::scope _settings(-cutplanesvisible)] \
2002	-command [itcl::code $this AdjustSetting -cutplanesvisible] \
2003	-font $font
2004
2005	checkbutton $inner.lighting \
2006	-text "Enable Lighting" \
2007	-variable [itcl::scope _settings(-cutplanelighting)] \
2008	-command [itcl::code $this AdjustSetting -cutplanelighting] \
2009	-font $font
2010
2011	label $inner.opacity_l -text "Opacity" -font $font
2012	::scale $inner.opacity -from 0 -to 100 -orient horizontal \
2013	-variable [itcl::scope _settings(-cutplaneopacity)] \
2014	-width 10 \
2015	-showvalue off \
2016	-command [itcl::code $this AdjustSetting -cutplaneopacity]
2017	$inner.opacity set $_settings(-cutplaneopacity)
2018
2019	# X-value slicer...
2020	itk_component add xCutButton {
2021	Rappture::PushButton $inner.xbutton \
2022	-onimage [Rappture::icon x-cutplane] \
2023	-offimage [Rappture::icon x-cutplane] \
2024	-command [itcl::code $this AdjustSetting -xcutplanevisible] \
2025	-variable [itcl::scope _settings(-xcutplanevisible)]
2026	}
2027	Rappture::Tooltip::for $itk_component(xCutButton) \
2028	"Toggle the X-axis cutplane on/off"
2029	$itk_component(xCutButton) select
2030
2031	itk_component add xCutScale {
2032	::scale $inner.xval -from 100 -to 0 \
2033	-width 10 -orient vertical -showvalue yes \
2034	-borderwidth 1 -highlightthickness 0 \
2035	-command [itcl::code $this EventuallySetCutplane x] \
2036	-variable [itcl::scope _settings(-xcutplaneposition)]
2037	} {
2038	usual
2039	ignore -borderwidth -highlightthickness
2040	}
2041	# Set the default cutplane value before disabling the scale.
2042	$itk_component(xCutScale) set 50
2043	$itk_component(xCutScale) configure -state disabled
2044	Rappture::Tooltip::for $itk_component(xCutScale) \
2045	"@[itcl::code $this Slice tooltip x]"
2046
2047	# Y-value slicer...
2048	itk_component add yCutButton {
2049	Rappture::PushButton $inner.ybutton \
2050	-onimage [Rappture::icon y-cutplane] \
2051	-offimage [Rappture::icon y-cutplane] \
2052	-command [itcl::code $this AdjustSetting -ycutplanevisible] \
2053	-variable [itcl::scope _settings(-ycutplanevisible)]
2054	}
2055	Rappture::Tooltip::for $itk_component(yCutButton) \
2056	"Toggle the Y-axis cutplane on/off"
2057	$itk_component(yCutButton) select
2058
2059	itk_component add yCutScale {
2060	::scale $inner.yval -from 100 -to 0 \
2061	-width 10 -orient vertical -showvalue yes \
2062	-borderwidth 1 -highlightthickness 0 \
2063	-command [itcl::code $this EventuallySetCutplane y] \
2064	-variable [itcl::scope _settings(-ycutplaneposition)]
2065	} {
2066	usual
2067	ignore -borderwidth -highlightthickness
2068	}
2069	Rappture::Tooltip::for $itk_component(yCutScale) \
2070	"@[itcl::code $this Slice tooltip y]"
2071	# Set the default cutplane value before disabling the scale.
2072	$itk_component(yCutScale) set 50
2073	$itk_component(yCutScale) configure -state disabled
2074
2075	# Z-value slicer...
2076	itk_component add zCutButton {
2077	Rappture::PushButton $inner.zbutton \
2078	-onimage [Rappture::icon z-cutplane] \
2079	-offimage [Rappture::icon z-cutplane] \
2080	-command [itcl::code $this AdjustSetting -zcutplanevisible] \
2081	-variable [itcl::scope _settings(-zcutplanevisible)]
2082	}
2083	Rappture::Tooltip::for $itk_component(zCutButton) \
2084	"Toggle the Z-axis cutplane on/off"
2085	$itk_component(zCutButton) select
2086
2087	itk_component add zCutScale {
2088	::scale $inner.zval -from 100 -to 0 \
2089	-width 10 -orient vertical -showvalue yes \
2090	-borderwidth 1 -highlightthickness 0 \
2091	-command [itcl::code $this EventuallySetCutplane z] \
2092	-variable [itcl::scope _settings(-zcutplaneposition)]
2093	} {
2094	usual
2095	ignore -borderwidth -highlightthickness
2096	}
2097	$itk_component(zCutScale) set 50
2098	$itk_component(zCutScale) configure -state disabled
2099	Rappture::Tooltip::for $itk_component(zCutScale) \
2100	"@[itcl::code $this Slice tooltip z]"
2101
2102	blt::table $inner \
2103	0,0 $inner.visible -anchor w -pady 2 -cspan 4 \
2104	1,0 $inner.lighting -anchor w -pady 2 -cspan 4 \
2105	2,0 $inner.opacity_l -anchor w -pady 2 -cspan 3 \
2106	3,0 $inner.opacity -fill x -pady 2 -cspan 3 \
2107	4,0 $itk_component(xCutButton) -anchor e -padx 2 -pady 2 \
2108	5,0 $itk_component(xCutScale) -fill y \
2109	4,1 $itk_component(yCutButton) -anchor e -padx 2 -pady 2 \
2110	5,1 $itk_component(yCutScale) -fill y \
2111	4,2 $itk_component(zCutButton) -anchor e -padx 2 -pady 2 \
2112	5,2 $itk_component(zCutScale) -fill y
2113
2114	blt::table configure $inner r* c* -resize none
2115	blt::table configure $inner r5 c3 -resize expand
2116	}
2117
2118	#
2119	# camera --
2120	#
2121	itcl::body Rappture::VtkVolumeViewer::camera {option args} {
2122	switch -- $option {
2123	"show" {
2124	puts [array get _view]
2125	}
2126	"set" {
2127	set what [lindex $args 0]
2128	set x $_view($what)
2129	set code [catch { string is double $x } result]
2130	if { $code != 0 \|\| !$result } {
2131	return
2132	}
2133	switch -- $what {
2134	"-ortho" {
2135	if {$_view($what)} {
2136	SendCmd "camera mode ortho"
2137	} else {
2138	SendCmd "camera mode persp"
2139	}
2140	}
2141	"-xpan" - "-ypan" {
2142	PanCamera
2143	}
2144	"-qx" - "-qy" - "-qz" - "-qw" {
2145	set q [ViewToQuaternion]
2146	$_arcball quaternion $q
2147	EventuallyRotate $q
2148	}
2149	"-zoom" {
2150	SendCmd "camera zoom $_view($what)"
2151	}
2152	}
2153	}
2154	}
2155	}
2156
2157	itcl::body Rappture::VtkVolumeViewer::GetVtkData { args } {
2158	set bytes ""
2159	foreach dataobj [get] {
2160	foreach comp [$dataobj components] {
2161	set tag $dataobj-$comp
2162	set contents [$dataobj vtkdata $comp]
2163	append bytes "$contents\n"
2164	}
2165	}
2166	return [list .vtk $bytes]
2167	}
2168
2169	itcl::body Rappture::VtkVolumeViewer::GetImage { args } {
2170	if { [image width $_image(download)] > 0 &&
2171	[image height $_image(download)] > 0 } {
2172	set bytes [$_image(download) data -format "jpeg -quality 100"]
2173	set bytes [Rappture::encoding::decode -as b64 $bytes]
2174	return [list .jpg $bytes]
2175	}
2176	return ""
2177	}
2178
2179	itcl::body Rappture::VtkVolumeViewer::BuildDownloadPopup { popup command } {
2180	Rappture::Balloon $popup \
2181	-title "[Rappture::filexfer::label downloadWord] as..."
2182	set inner [$popup component inner]
2183	label $inner.summary -text "" -anchor w
2184	radiobutton $inner.vtk_button -text "VTK data file" \
2185	-variable [itcl::scope _downloadPopup(format)] \
2186	-font "Helvetica 9 " \
2187	-value vtk
2188	Rappture::Tooltip::for $inner.vtk_button "Save as VTK data file."
2189	radiobutton $inner.image_button -text "Image File" \
2190	-variable [itcl::scope _downloadPopup(format)] \
2191	-value image
2192	Rappture::Tooltip::for $inner.image_button \
2193	"Save as digital image."
2194
2195	button $inner.ok -text "Save" \
2196	-highlightthickness 0 -pady 2 -padx 3 \
2197	-command $command \
2198	-compound left \
2199	-image [Rappture::icon download]
2200
2201	button $inner.cancel -text "Cancel" \
2202	-highlightthickness 0 -pady 2 -padx 3 \
2203	-command [list $popup deactivate] \
2204	-compound left \
2205	-image [Rappture::icon cancel]
2206
2207	blt::table $inner \
2208	0,0 $inner.summary -cspan 2 \
2209	1,0 $inner.vtk_button -anchor w -cspan 2 -padx { 4 0 } \
2210	2,0 $inner.image_button -anchor w -cspan 2 -padx { 4 0 } \
2211	4,1 $inner.cancel -width .9i -fill y \
2212	4,0 $inner.ok -padx 2 -width .9i -fill y
2213	blt::table configure $inner r3 -height 4
2214	blt::table configure $inner r4 -pady 4
2215	raise $inner.image_button
2216	$inner.vtk_button invoke
2217	return $inner
2218	}
2219
2220	itcl::body Rappture::VtkVolumeViewer::SetObjectStyle { dataobj cname } {
2221	# Parse style string.
2222	set tag $dataobj-$cname
2223	array set style {
2224	-color BCGYR
2225	-lighting 1
2226	-opacity 0.5
2227	-outline 0
2228	-visible 1
2229	}
2230	array set style [$dataobj style $cname]
2231	set _settings($cname-volumelighting) $style(-lighting)
2232	set _settings($cname-volumeopacity) [expr $style(-opacity) * 100]
2233	set _settings($cname-volumeoutline) $style(-outline)
2234	set _settings($cname-volumevisible) $style(-visible)
2235
2236	$itk_component(colormap) value $style(-color)
2237
2238	SendCmd "outline add $tag"
2239	SendCmd "outline color [Color2RGB $itk_option(-plotforeground)] $tag"
2240	SendCmd "outline visible $style(-outline) $tag"
2241
2242	SendCmd "$_cutplaneCmd add $tag"
2243	SendCmd "$_cutplaneCmd color [Color2RGB $itk_option(-plotforeground)] $tag"
2244	SendCmd "$_cutplaneCmd visible 0 $tag"
2245
2246	SendCmd "volume add $tag"
2247	SendCmd "volume lighting $style(-lighting) $tag"
2248	SendCmd "volume opacity $style(-opacity) $tag"
2249	SendCmd "volume visible $style(-visible) $tag"
2250
2251	SetInitialTransferFunction $dataobj $cname
2252	SendCmd "volume colormap $cname $tag"
2253	SendCmd "$_cutplaneCmd colormap $cname-opaque $tag"
2254	}
2255
2256	itcl::body Rappture::VtkVolumeViewer::IsValidObject { dataobj } {
2257	if {[catch {$dataobj isa Rappture::Field} valid] != 0 \|\| !$valid} {
2258	return 0
2259	}
2260	return 1
2261	}
2262
2263	# ----------------------------------------------------------------------
2264	# USAGE: ReceiveLegend <colormap> <title> <vmin> <vmax> <size>
2265	#
2266	# Invoked automatically whenever the "legend" command comes in from
2267	# the rendering server. Indicates that binary image data with the
2268	# specified <size> will follow.
2269	# ----------------------------------------------------------------------
2270	itcl::body Rappture::VtkVolumeViewer::ReceiveLegend { colormap title vmin vmax size } {
2271	if { [isconnected] } {
2272	set bytes [ReceiveBytes $size]
2273	if { ![info exists _image(legend)] } {
2274	set _image(legend) [image create photo]
2275	}
2276	$_image(legend) configure -data $bytes
2277	#puts stderr "read $size bytes for [image width $_image(legend)]x[image height $_image(legend)] legend>"
2278	if { [catch {DrawLegend} errs] != 0 } {
2279	puts stderr errs=$errs
2280	}
2281	}
2282	}
2283
2284	#
2285	# DrawLegend --
2286	#
2287	itcl::body Rappture::VtkVolumeViewer::DrawLegend {} {
2288	if { $_current == "" } {
2289	set _current "component"
2290	}
2291	set cname $_current
2292	set c $itk_component(legend)
2293	set w [winfo width $c]
2294	set h [winfo height $c]
2295	set lx 10
2296	set ly [expr {$h - 1}]
2297	if {"" == [$c find withtag colorbar]} {
2298	$c create image 10 10 -anchor nw \
2299	-image $_image(legend) -tags colorbar
2300	$c create text $lx $ly -anchor sw \
2301	-fill $itk_option(-plotforeground) -tags "limits text vmin"
2302	$c create text [expr {$w-$lx}] $ly -anchor se \
2303	-fill $itk_option(-plotforeground) -tags "limits text vmax"
2304	$c create text [expr {$w/2}] $ly -anchor s \
2305	-fill $itk_option(-plotforeground) -tags "limits text title"
2306	$c lower colorbar
2307	$c bind colorbar <ButtonRelease-1> [itcl::code $this AddNewMarker %x %y]
2308	}
2309
2310	# Display the markers used by the current transfer function.
2311	HideAllMarkers
2312	if { [info exists _transferFunctionEditors($cname)] } {
2313	$_transferFunctionEditors($cname) showMarkers $_limits($cname)
2314	}
2315
2316	foreach {min max} $_limits($cname) break
2317	$c itemconfigure vmin -text [format %g $min]
2318	$c coords vmin $lx $ly
2319
2320	$c itemconfigure vmax -text [format %g $max]
2321	$c coords vmax [expr {$w-$lx}] $ly
2322
2323	set title ""
2324	if { $_first != "" } {
2325	set title [$_first hints label]
2326	set units [$_first hints units]
2327	if { $units != "" } {
2328	set title "$title ($units)"
2329	}
2330	}
2331	$c itemconfigure title -text $title
2332	$c coords title [expr {$w/2}] $ly
2333	}
2334
2335	#
2336	# EnterLegend --
2337	#
2338	itcl::body Rappture::VtkVolumeViewer::EnterLegend { x y } {
2339	SetLegendTip $x $y
2340	}
2341
2342	#
2343	# MotionLegend --
2344	#
2345	itcl::body Rappture::VtkVolumeViewer::MotionLegend { x y } {
2346	Rappture::Tooltip::tooltip cancel
2347	set c $itk_component(view)
2348	SetLegendTip $x $y
2349	}
2350
2351	#
2352	# LeaveLegend --
2353	#
2354	itcl::body Rappture::VtkVolumeViewer::LeaveLegend { } {
2355	Rappture::Tooltip::tooltip cancel
2356	.rappturetooltip configure -icon ""
2357	}
2358
2359	#
2360	# SetLegendTip --
2361	#
2362	itcl::body Rappture::VtkVolumeViewer::SetLegendTip { x y } {
2363	set c $itk_component(view)
2364	set w [winfo width $c]
2365	set h [winfo height $c]
2366	set font "Arial 8"
2367	set lineht [font metrics $font -linespace]
2368
2369	set imgHeight [image height $_image(legend)]
2370	set coords [$c coords colormap]
2371	set imgX [expr $w - [image width $_image(legend)] - 2]
2372	set imgY [expr $y - 2 * ($lineht + 2)]
2373
2374	if { [info exists _fields($_title)] } {
2375	foreach { title units } $_fields($_title) break
2376	if { $units != "" } {
2377	set title [format "%s (%s)" $title $units]
2378	}
2379	} else {
2380	set title $_title
2381	}
2382	# Make a swatch of the selected color
2383	if { [catch { $_image(legend) get 10 $imgY } pixel] != 0 } {
2384	#puts stderr "out of range: $imgY"
2385	return
2386	}
2387	if { ![info exists _image(swatch)] } {
2388	set _image(swatch) [image create photo -width 24 -height 24]
2389	}
2390	set color [eval format "\#%02x%02x%02x" $pixel]
2391	$_image(swatch) put black -to 0 0 23 23
2392	$_image(swatch) put $color -to 1 1 22 22
2393	.rappturetooltip configure -icon $_image(swatch)
2394
2395	# Compute the value of the point
2396	if { [info exists _limits($_curFldName)] } {
2397	foreach { vmin vmax } $_limits($_curFldName) break
2398	set t [expr 1.0 - (double($imgY) / double($imgHeight-1))]
2399	set value [expr $t * ($vmax - $vmin) + $vmin]
2400	} else {
2401	set value 0.0
2402	}
2403	set tipx [expr $x + 15]
2404	set tipy [expr $y - 5]
2405	Rappture::Tooltip::text $c "$title $value"
2406	Rappture::Tooltip::tooltip show $c +$tipx,+$tipy
2407	}
2408
2409	# ----------------------------------------------------------------------
2410	# USAGE: Slice move x\|y\|z <newval>
2411	#
2412	# Called automatically when the user drags the slider to move the
2413	# cut plane that slices 3D data. Gets the current value from the
2414	# slider and moves the cut plane to the appropriate point in the
2415	# data set.
2416	# ----------------------------------------------------------------------
2417	itcl::body Rappture::VtkVolumeViewer::Slice {option args} {
2418	switch -- $option {
2419	"move" {
2420	set axis [lindex $args 0]
2421	set newval [lindex $args 1]
2422	if {[llength $args] != 2} {
2423	error "wrong # args: should be \"Slice move x\|y\|z newval\""
2424	}
2425	set newpos [expr {0.01*$newval}]
2426	SendCmd "$_cutplaneCmd slice $axis $newpos"
2427	}
2428	"tooltip" {
2429	set axis [lindex $args 0]
2430	set val [$itk_component(${axis}CutScale) get]
2431	return "Move the [string toupper $axis] cut plane.\nCurrently: $axis = $val%"
2432	}
2433	default {
2434	error "bad option \"$option\": should be axis, move, or tooltip"
2435	}
2436	}
2437	}
2438
2439	# ----------------------------------------------------------------------
2440	# USAGE: _dropdown post
2441	# USAGE: _dropdown unpost
2442	# USAGE: _dropdown select
2443	#
2444	# Used internally to handle the dropdown list for this combobox. The
2445	# post/unpost options are invoked when the list is posted or unposted
2446	# to manage the relief of the controlling button. The select option
2447	# is invoked whenever there is a selection from the list, to assign
2448	# the value back to the gauge.
2449	# ----------------------------------------------------------------------
2450	itcl::body Rappture::VtkVolumeViewer::Combo {option} {
2451	set c $itk_component(view)
2452	switch -- $option {
2453	post {
2454	foreach { x1 y1 x2 y2 } [$c bbox title] break
2455	set x1 [expr [winfo width $itk_component(view)] - [winfo reqwidth $itk_component(fieldmenu)]]
2456	set x [expr $x1 + [winfo rootx $itk_component(view)]]
2457	set y [expr $y2 + [winfo rooty $itk_component(view)]]
2458	tk_popup $itk_component(fieldmenu) $x $y
2459	}
2460	activate {
2461	$c itemconfigure title -fill red
2462	}
2463	deactivate {
2464	$c itemconfigure title -fill $itk_option(-plotforeground)
2465	}
2466	invoke {
2467	$itk_component(field) value $_curFldLabel
2468	AdjustSetting -field
2469	}
2470	default {
2471	error "bad option \"$option\": should be post, unpost, select"
2472	}
2473	}
2474	}
2475
2476	#
2477	# The -levels option takes a single value that represents the number
2478	# of evenly distributed markers based on the current data range. Each
2479	# marker is a relative value from 0.0 to 1.0.
2480	#
2481	itcl::body Rappture::VtkVolumeViewer::ParseLevelsOption { cname levels } {
2482	set c $itk_component(legend)
2483	set list {}
2484	regsub -all "," $levels " " levels
2485	if {[string is int $levels]} {
2486	for {set i 1} { $i <= $levels } {incr i} {
2487	lappend list [expr {double($i)/($levels+1)}]
2488	}
2489	} else {
2490	foreach x $levels {
2491	lappend list $x
2492	}
2493	}
2494	set _parsedFunction($cname) 1
2495	$_transferFunctionEditors($cname) addMarkers $list
2496	}
2497
2498	#
2499	# The -markers option takes a list of zero or more values (the values
2500	# may be separated either by spaces or commas) that have the following
2501	# format:
2502	#
2503	# N% Percent of current total data range. Converted to
2504	# to a relative value between 0.0 and 1.0.
2505	# N Absolute value of marker. If the marker is outside of
2506	# the current range, it will be displayed on the outer
2507	# edge of the legends, but it range it represents will
2508	# not be seen.
2509	#
2510	itcl::body Rappture::VtkVolumeViewer::ParseMarkersOption { cname markers } {
2511	set c $itk_component(legend)
2512	set list {}
2513	foreach { min max } $_limits($cname) break
2514	regsub -all "," $markers " " markers
2515	foreach marker $markers {
2516	set n [scan $marker "%g%s" value suffix]
2517	if { $n == 2 && $suffix == "%" } {
2518	# $n% : Set relative value (0..1).
2519	lappend list [expr {$value * 0.01}]
2520	} else {
2521	# $n : absolute value, compute relative
2522	lappend list [expr {(double($value)-$min)/($max-$min)]}
2523	}
2524	}
2525	set _parsedFunction($cname) 1
2526	$_transferFunctionEditors($cname) addMarkers $list
2527	}
2528
2529	#
2530	# SetInitialTransferFunction --
2531	#
2532	# Creates a transfer function name based on the <style> settings in the
2533	# library run.xml file. This placeholder will be used later to create
2534	# and send the actual transfer function once the data info has been sent
2535	# to us by the render server. [We won't know the volume limits until the
2536	# server parses the 3D data and sends back the limits via ReceiveData.]
2537	#
2538	itcl::body Rappture::VtkVolumeViewer::SetInitialTransferFunction { dataobj cname } {
2539	set tag $dataobj-$cname
2540	if { ![info exists _cname2transferFunction($cname)] } {
2541	ComputeTransferFunction $cname
2542	}
2543	set _dataset2style($tag) $cname
2544
2545	return $cname
2546	}
2547
2548	#
2549	# ComputeTransferFunction --
2550	#
2551	# Computes and sends the transfer function to the render server. It's
2552	# assumed that the volume data limits are known and that the global
2553	# transfer-functions slider values have been set up. Both parts are
2554	# needed to compute the relative value (location) of the marker, and
2555	# the alpha map of the transfer function.
2556	#
2557	itcl::body Rappture::VtkVolumeViewer::ComputeTransferFunction { cname } {
2558
2559	if { ![info exists _transferFunctionEditors($cname)] } {
2560	set _transferFunctionEditors($cname) \
2561	[Rappture::TransferFunctionEditor ::\#auto $itk_component(legend) \
2562	$cname \
2563	-command [itcl::code $this updateTransferFunctions]]
2564	}
2565
2566	# We have to parse the style attributes for a volume using this
2567	# transfer-function once. This sets up the initial isomarkers for the
2568	# transfer function. The user may add/delete markers, so we have to
2569	# maintain a list of markers for each transfer-function. We use the one
2570	# of the volumes (the first in the list) using the transfer-function as a
2571	# reference.
2572
2573	if { ![info exists _parsedFunction($cname)] \|\|
2574	![info exists _cname2transferFunction($cname)] } {
2575	array set style {
2576	-color BCGYR
2577	-alphamap ""
2578	-levels 6
2579	-markers ""
2580	}
2581	# Accumulate the style from all the datasets using it.
2582	foreach tag [GetDatasetsWithComponent $cname] {
2583	foreach {dataobj cname} [split [lindex $tag 0] -] break
2584	set option [lindex [$dataobj components -style $cname] 0]
2585	array set style $option
2586	}
2587	set _settings($cname-color) $style(-color)
2588	set cmap [ColorsToColormap $style(-color)]
2589	set _cname2defaultcolormap($cname) $cmap
2590	if { [info exists _transferFunctionEditors($cname)] } {
2591	eval $_transferFunctionEditors($cname) limits $_limits($cname)
2592	}
2593	if { [info exists style(-markers)] &&
2594	[llength $style(-markers)] > 0 } {
2595	ParseMarkersOption $cname $style(-markers)
2596	} else {
2597	ParseLevelsOption $cname $style(-levels)
2598	}
2599	if { $style(-alphamap) != "" } {
2600	set _alphamap($cname) $style(-alphamap)
2601	}
2602	} else {
2603	foreach {cmap amap} $_cname2transferFunction($cname) break
2604	}
2605	if { ![info exists _alphamap($cname)] } {
2606	set amap [ComputeAlphamap $cname]
2607	} else {
2608	set amap $_alphamap($cname)
2609	}
2610	set opaqueAmap "0.0 1.0 1.0 1.0"
2611	set _cname2transferFunction($cname) [list $cmap $amap]
2612	SendCmd [list colormap define $cname $cmap $amap]
2613	SendCmd [list colormap define $cname-opaque $cmap $opaqueAmap]
2614	}
2615
2616	#
2617	# ResetColormap --
2618	#
2619	# Changes only the colormap portion of the transfer function.
2620	#
2621	itcl::body Rappture::VtkVolumeViewer::ResetColormap { cname color } {
2622	# Get the current transfer function
2623	if { ![info exists _cname2transferFunction($cname)] } {
2624	return
2625	}
2626	foreach { cmap amap } $_cname2transferFunction($cname) break
2627	set cmap [GetColormap $cname $color]
2628	set _cname2transferFunction($cname) [list $cmap $amap]
2629	set opaqueAmap "0.0 1.0 1.0 1.0"
2630	SendCmd [list colormap define $cname $cmap $amap]
2631	SendCmd [list colormap define $cname-opaque $cmap $opaqueAmap]
2632	EventuallyRequestLegend
2633	}
2634
2635	# ----------------------------------------------------------------------
2636	# USAGE: updateTransferFunctions
2637	#
2638	# This is called by the transfer function editor whenever the
2639	# transfer function definition changes.
2640	#
2641	# ----------------------------------------------------------------------
2642	itcl::body Rappture::VtkVolumeViewer::updateTransferFunctions {} {
2643	foreach cname [array names _volcomponents] {
2644	ComputeTransferFunction $cname
2645	}
2646	EventuallyRequestLegend
2647	}
2648
2649	itcl::body Rappture::VtkVolumeViewer::AddNewMarker { x y } {
2650	if { ![info exists _transferFunctionEditors($_current)] } {
2651	continue
2652	}
2653	# Add a new marker to the current transfer function
2654	$_transferFunctionEditors($_current) newMarker $x $y normal
2655	}
2656
2657	itcl::body Rappture::VtkVolumeViewer::RemoveMarker { x y } {
2658	if { ![info exists _transferFunctionEditors($_current)] } {
2659	continue
2660	}
2661	# Add a new marker to the current transfer function
2662	$_transferFunctionEditors($_current) deleteMarker $x $y
2663	}
2664
2665	itcl::body Rappture::VtkVolumeViewer::SetOrientation { side } {
2666	array set positions {
2667	front "1 0 0 0"
2668	back "0 0 1 0"
2669	left "0.707107 0 -0.707107 0"
2670	right "0.707107 0 0.707107 0"
2671	top "0.707107 -0.707107 0 0"
2672	bottom "0.707107 0.707107 0 0"
2673	}
2674	foreach name { -qw -qx -qy -qz } value $positions($side) {
2675	set _view($name) $value
2676	}
2677	set q [ViewToQuaternion]
2678	$_arcball quaternion $q
2679	SendCmd "camera orient $q"
2680	SendCmd "camera reset"
2681	set _view(-xpan) 0
2682	set _view(-ypan) 0
2683	set _view(-zoom) 1.0
2684	}
2685
2686	#
2687	# InitComponentSettings --
2688	#
2689	# Initializes the volume settings for a specific component. This
2690	# should match what's used as global settings above. This
2691	# is called the first time we try to switch to a given component
2692	# in SwitchComponent below.
2693	#
2694	itcl::body Rappture::VtkVolumeViewer::InitComponentSettings { cname } {
2695	array set _settings [subst {
2696	$cname-color default
2697	$cname-volumeambient 40
2698	$cname-volumeblendmode composite
2699	$cname-volumediffuse 60
2700	$cname-volumelight2side 1
2701	$cname-volumelighting 1
2702	$cname-volumeopacity 50
2703	$cname-volumeoutline 0
2704	$cname-volumequality 80
2705	$cname-volumespecularexponent 90
2706	$cname-volumespecularlevel 30
2707	$cname-volumethickness 350
2708	$cname-volumevisible 1
2709	}]
2710	}
2711
2712	#
2713	# SwitchComponent --
2714	#
2715	# This is called when the current component is changed by the
2716	# dropdown menu in the volume tab. It synchronizes the global
2717	# volume settings with the settings of the new current component.
2718	#
2719	itcl::body Rappture::VtkVolumeViewer::SwitchComponent { cname } {
2720	if { ![info exists _settings(${cname}-volumeambient)] } {
2721	InitComponentSettings $cname
2722	}
2723	# _settings variables change widgets, except for colormap
2724	foreach name {
2725	-volumeambient
2726	-volumeblendmode
2727	-volumediffuse
2728	-volumelight2side
2729	-volumelighting
2730	-volumeopacity
2731	-volumeoutline
2732	-volumequality
2733	-volumespecularexponent
2734	-volumespecularlevel
2735	-volumethickness
2736	-volumevisible
2737	} {
2738	set _settings($name) $_settings(${cname}${name})
2739	}
2740	$itk_component(colormap) value $_settings($cname-color)
2741	set _current $cname; # Reset the current component
2742	}
2743
2744	itcl::body Rappture::VtkVolumeViewer::ComputeAlphamap { cname } {
2745	if { ![info exists _transferFunctionEditors($cname)] } {
2746	return [list 0.0 0.0 1.0 1.0]
2747	}
2748	if { ![info exists _settings($cname-volumeambient)] } {
2749	InitComponentSettings $cname
2750	}
2751
2752	set isovalues [$_transferFunctionEditors($cname) values]
2753
2754	# Currently using volume opacity to scale opacity in
2755	# the volume shader. The transfer function always sets full
2756	# opacity
2757	set max 1.0;
2758
2759	# Use the component-wise thickness setting from the slider
2760	# settings widget
2761	# Scale values between 0.00001 and 0.01000
2762	set delta [expr {double($_settings($cname-volumethickness)) * 0.0001}]
2763	set first [lindex $isovalues 0]
2764	set last [lindex $isovalues end]
2765	set amap ""
2766	if { $first == "" \|\| $first != 0.0 } {
2767	lappend amap 0.0 0.0
2768	}
2769	foreach x $isovalues {
2770	set x1 [expr {$x-$delta-0.00001}]
2771	set x2 [expr {$x-$delta}]
2772	set x3 [expr {$x+$delta}]
2773	set x4 [expr {$x+$delta+0.00001}]
2774	if { $x1 < 0.0 } {
2775	set x1 0.0
2776	} elseif { $x1 > 1.0 } {
2777	set x1 1.0
2778	}
2779	if { $x2 < 0.0 } {
2780	set x2 0.0
2781	} elseif { $x2 > 1.0 } {
2782	set x2 1.0
2783	}
2784	if { $x3 < 0.0 } {
2785	set x3 0.0
2786	} elseif { $x3 > 1.0 } {
2787	set x3 1.0
2788	}
2789	if { $x4 < 0.0 } {
2790	set x4 0.0
2791	} elseif { $x4 > 1.0 } {
2792	set x4 1.0
2793	}
2794	# add spikes in the middle
2795	lappend amap $x1 0.0
2796	lappend amap $x2 $max
2797	lappend amap $x3 $max
2798	lappend amap $x4 0.0
2799	}
2800	if { $last == "" \|\| $last != 1.0 } {
2801	lappend amap 1.0 0.0
2802	}
2803	return $amap
2804	}
2805
2806	#
2807	# HideAllMarkers --
2808	#
2809	# Hide all the markers in all the transfer functions. Can't simply
2810	# delete and recreate markers from the <style> since the user may
2811	# have create, deleted, or moved markers.
2812	#
2813	itcl::body Rappture::VtkVolumeViewer::HideAllMarkers {} {
2814	foreach cname [array names _transferFunctionEditors] {
2815	$_transferFunctionEditors($cname) hideMarkers
2816	}
2817	}
2818
2819	#
2820	# GetDatasetsWithComponents --
2821	#
2822	# Returns a list of all the datasets (known by the combination of
2823	# their data object and component name) that match the given
2824	# component name. For example, this is used where we want to change
2825	# the settings of volumes that have the current component.
2826	#
2827	itcl::body Rappture::VtkVolumeViewer::GetDatasetsWithComponent { cname } {
2828	if { ![info exists _volcomponents($cname)] } {
2829	return ""
2830	}
2831	return $_volcomponents($cname)
2832	}
2833
2834	#
2835	# BuildVolumeComponents --
2836	#
2837	# This is called from the "scale" method which is called when a
2838	# new dataset is added or deleted. It repopulates the dropdown
2839	# menu of volume component names. It sets the current component
2840	# to the first component in the list (of components found).
2841	# Finally, if there is only one component, don't display the
2842	# label or the combobox in the volume settings tab.
2843	#
2844	itcl::body Rappture::VtkVolumeViewer::BuildVolumeComponents {} {
2845	$itk_component(volcomponents) choices delete 0 end
2846	foreach name $_componentsList {
2847	$itk_component(volcomponents) choices insert end $name $name
2848	}
2849	set _current [lindex $_componentsList 0]
2850	$itk_component(volcomponents) value $_current
2851	set parent [winfo parent $itk_component(volcomponents)]
2852	if { [llength $_componentsList] <= 1 } {
2853	# Unpack the components label and dropdown if there's only one
2854	# component.
2855	catch {blt::table forget $parent.volcomponents_l $parent.volcomponents}
2856	} else {
2857	# Pack the components label and dropdown into the table there's
2858	# more than one component to select.
2859	blt::table $parent \
2860	0,0 $parent.volcomponents_l -anchor e -cspan 2 \
2861	0,2 $parent.volcomponents -cspan 3 -fill x
2862	}
2863	}
2864
2865	itcl::body Rappture::VtkVolumeViewer::GetColormap { cname color } {
2866	if { $color == "default" } {
2867	return $_cname2defaultcolormap($cname)
2868	}
2869	return [ColorsToColormap $color]
2870	}

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