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source: branches/1.6/gui/scripts/vtkvolumeviewer.tcl @ 6155

Last change on this file since 6155 was 6155, checked in by ldelgass, 9 years ago
merge viewer cleanups from trunk
File size: 82.5 KB

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1	# -- mode: tcl; indent-tabs-mode: nil --
2	# ----------------------------------------------------------------------
3	# COMPONENT: vtkvolumeviewer - Vtk volume viewer
4	#
5	# This widget performs volume rendering on 3D scalar/vector datasets.
6	# It connects to the Vtkvis server running on a rendering farm,
7	# transmits data, and displays the results.
8	# ======================================================================
9	# AUTHOR: Michael McLennan, Purdue University
10	# Copyright (c) 2004-2016 HUBzero Foundation, LLC
11	#
12	# See the file "license.terms" for information on usage and
13	# redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES.
14	# ======================================================================
15	package require Itk
16	package require BLT
17	#package require Img
18
19	option add *VtkVolumeViewer.width 4i widgetDefault
20	option add VtkVolumeViewercursor crosshair widgetDefault
21	option add *VtkVolumeViewer.height 4i widgetDefault
22	option add *VtkVolumeViewer.foreground black widgetDefault
23	option add *VtkVolumeViewer.controlBackground gray widgetDefault
24	option add *VtkVolumeViewer.controlDarkBackground #999999 widgetDefault
25	option add *VtkVolumeViewer.plotBackground black widgetDefault
26	option add *VtkVolumeViewer.plotForeground white widgetDefault
27	option add *VtkVolumeViewer.font \
28	--helvetica-medium-r-normal--12-* widgetDefault
29
30	# must use this name -- plugs into Rappture::resources::load
31	proc VtkVolumeViewer_init_resources {} {
32	Rappture::resources::register \
33	vtkvis_server Rappture::VtkVolumeViewer::SetServerList
34	}
35
36	itcl::class Rappture::VtkVolumeViewer {
37	inherit Rappture::VisViewer
38
39	itk_option define -plotforeground plotForeground Foreground ""
40	itk_option define -plotbackground plotBackground Background ""
41
42	constructor { args } {
43	Rappture::VisViewer::constructor
44	} {
45	# defined below
46	}
47	destructor {
48	# defined below
49	}
50	public proc SetServerList { namelist } {
51	Rappture::VisViewer::SetServerList "vtkvis" $namelist
52	}
53	public method add {dataobj {settings ""}}
54	public method camera {option args}
55	public method delete {args}
56	public method disconnect {}
57	public method download {option args}
58	public method get {args}
59	public method isconnected {}
60	public method parameters {title args} {
61	# do nothing
62	}
63	public method scale {args}
64
65	# The following methods are only used by this class.
66	private method AdjustSetting {what {value ""}}
67	private method BuildAxisTab {}
68	private method BuildCameraTab {}
69	private method BuildColormap { name colors }
70	private method BuildCutplanesTab {}
71	private method BuildDownloadPopup { widget command }
72	private method BuildViewTab {}
73	private method BuildVolumeTab {}
74	private method ChangeColormap { dataobj comp color }
75	private method Combo { option }
76	private method Connect {}
77	private method CurrentDatasets {args}
78	private method Disconnect {}
79	private method DoResize {}
80	private method DoRotate {}
81	private method DrawLegend {}
82	private method EnterLegend { x y }
83	private method EventuallyRequestLegend {}
84	private method EventuallyResize { w h }
85	private method EventuallyRotate { q }
86	private method EventuallySetCutplane { axis args }
87	private method GetDatasetsWithComponent { cname }
88	private method GetImage { args }
89	private method GetVtkData { args }
90	private method InitSettings { args }
91	private method IsValidObject { dataobj }
92	private method LeaveLegend {}
93	private method MotionLegend { x y }
94	private method Pan {option x y}
95	private method PanCamera {}
96	private method Pick {x y}
97	private method QuaternionToView { q } {
98	foreach { _view(-qw) _view(-qx) _view(-qy) _view(-qz) } $q break
99	}
100	private method Rebuild {}
101	private method ReceiveDataset { args }
102	private method ReceiveImage { args }
103	private method ReceiveLegend { colormap title vmin vmax size }
104	private method RequestLegend {}
105	private method Rotate {option x y}
106	private method SetColormap { dataobj comp }
107	private method SetLegendTip { x y }
108	private method SetObjectStyle { dataobj cname }
109	private method SetOrientation { side }
110	private method Slice {option args}
111	private method ViewToQuaternion {} {
112	return [list $_view(-qw) $_view(-qx) $_view(-qy) $_view(-qz)]
113	}
114	private method Zoom {option}
115
116	private variable _arcball ""
117	private variable _dlist ""; # list of data objects
118	private variable _obj2ovride; # maps dataobj => style override
119	private variable _datasets; # contains all the dataobj-component
120	# datasets in the server
121	private variable _colormaps; # contains all the colormaps
122	# in the server.
123	private variable _dataset2style; # maps dataobj-component to transfunc
124
125	private variable _reset 1; # Connection to server has been reset.
126	private variable _click; # Info used for rotate operations.
127	private variable _limits; # Autoscale min/max for all axes
128	private variable _view; # View params for 3D view
129	private variable _settings
130	private variable _style; # Array of current component styles.
131	private variable _initialStyle; # Array of initial component styles.
132
133	private variable _start 0
134	private variable _title ""
135	private variable _fields
136	private variable _curFldName ""
137	private variable _curFldLabel ""
138	private variable _colorMode "scalar"; # Mode of colormap (vmag or scalar)
139	private variable _cutplaneCmd "imgcutplane"
140	private variable _allowMultiComponent 0
141
142	private variable _first ""; # This is the topmost dataset.
143	private variable _volcomponents; # Maps component name to list of
144	# dataobj-component tags
145	private variable _componentsList; # List of components found
146
147	private variable _width 0
148	private variable _height 0
149	private variable _resizePending 0
150	private variable _legendPending 0
151	private variable _rotatePending 0
152	private variable _cutplanePending 0
153
154	private common _downloadPopup; # download options from popup
155	private common _hardcopy
156	}
157
158	itk::usual VtkVolumeViewer {
159	keep -background -foreground -cursor -font
160	keep -plotbackground -plotforeground
161	}
162
163	# ----------------------------------------------------------------------
164	# CONSTRUCTOR
165	# ----------------------------------------------------------------------
166	itcl::body Rappture::VtkVolumeViewer::constructor {args} {
167	set _serverType "vtkvis"
168
169	#DebugOn
170	EnableWaitDialog 900
171
172	# Rebuild event
173	$_dispatcher register !rebuild
174	$_dispatcher dispatch $this !rebuild "[itcl::code $this Rebuild]; list"
175
176	# Resize event
177	$_dispatcher register !resize
178	$_dispatcher dispatch $this !resize "[itcl::code $this DoResize]; list"
179
180	# Legend event
181	$_dispatcher register !legend
182	$_dispatcher dispatch $this !legend "[itcl::code $this RequestLegend]; list"
183
184	# Rotate event
185	$_dispatcher register !rotate
186	$_dispatcher dispatch $this !rotate "[itcl::code $this DoRotate]; list"
187
188	# X-Cutplane event
189	$_dispatcher register !xcutplane
190	$_dispatcher dispatch $this !xcutplane \
191	"[itcl::code $this AdjustSetting -xcutplaneposition]; list"
192
193	# Y-Cutplane event
194	$_dispatcher register !ycutplane
195	$_dispatcher dispatch $this !ycutplane \
196	"[itcl::code $this AdjustSetting -ycutplaneposition]; list"
197
198	# Z-Cutplane event
199	$_dispatcher register !zcutplane
200	$_dispatcher dispatch $this !zcutplane \
201	"[itcl::code $this AdjustSetting -zcutplaneposition]; list"
202
203	#
204	# Populate parser with commands handle incoming requests
205	#
206	$_parser alias image [itcl::code $this ReceiveImage]
207	$_parser alias legend [itcl::code $this ReceiveLegend]
208	$_parser alias dataset [itcl::code $this ReceiveDataset]
209
210	# Initialize the view to some default parameters.
211	array set _view {
212	-ortho 0
213	-qw 0.853553
214	-qx -0.353553
215	-qy 0.353553
216	-qz 0.146447
217	-xpan 0
218	-ypan 0
219	-zoom 1.0
220	}
221	set _arcball [blt::arcball create 100 100]
222	$_arcball quaternion [ViewToQuaternion]
223
224	array set _settings {
225	-axesvisible 1
226	-axisflymode static
227	-axislabels 1
228	-axisminorticks 1
229	-background black
230	-color BCGYR
231	-cutplanelighting 1
232	-cutplaneopacity 100
233	-cutplanesvisible 0
234	-legendvisible 1
235	-volumelighting 1
236	-volumematerial 80
237	-volumeopacity 50
238	-volumeoutline 0
239	-volumequality 80
240	-volumevisible 1
241	-xcutplaneposition 50
242	-xcutplanevisible 1
243	-xgrid 0
244	-ycutplaneposition 50
245	-ycutplanevisible 1
246	-ygrid 0
247	-zcutplaneposition 50
248	-zcutplanevisible 1
249	-zgrid 0
250	}
251
252	itk_component add view {
253	canvas $itk_component(plotarea).view \
254	-highlightthickness 0 -borderwidth 0
255	} {
256	usual
257	ignore -highlightthickness -borderwidth -background
258	}
259
260	itk_component add fieldmenu {
261	menu $itk_component(plotarea).menu -bg black -fg white -relief flat \
262	-tearoff 0
263	} {
264	usual
265	ignore -background -foreground -relief -tearoff
266	}
267	set c $itk_component(view)
268	bind $c <Configure> [itcl::code $this EventuallyResize %w %h]
269	bind $c <4> [itcl::code $this Zoom in 0.25]
270	bind $c <5> [itcl::code $this Zoom out 0.25]
271	bind $c <KeyPress-Left> [list %W xview scroll 10 units]
272	bind $c <KeyPress-Right> [list %W xview scroll -10 units]
273	bind $c <KeyPress-Up> [list %W yview scroll 10 units]
274	bind $c <KeyPress-Down> [list %W yview scroll -10 units]
275	bind $c <Enter> "focus %W"
276	bind $c <Control-F1> [itcl::code $this ToggleConsole]
277
278	# Fixes the scrollregion in case we go off screen
279	$c configure -scrollregion [$c bbox all]
280
281	set _map(id) [$c create image 0 0 -anchor nw -image $_image(plot)]
282	set _map(cwidth) -1
283	set _map(cheight) -1
284	set _map(zoom) 1.0
285	set _map(original) ""
286
287	set f [$itk_component(main) component controls]
288	itk_component add reset {
289	button $f.reset -borderwidth 1 -padx 1 -pady 1 \
290	-highlightthickness 0 \
291	-image [Rappture::icon reset-view] \
292	-command [itcl::code $this Zoom reset]
293	} {
294	usual
295	ignore -highlightthickness
296	}
297	pack $itk_component(reset) -side top -padx 2 -pady 2
298	Rappture::Tooltip::for $itk_component(reset) \
299	"Reset the view to the default zoom level"
300
301	itk_component add zoomin {
302	button $f.zin -borderwidth 1 -padx 1 -pady 1 \
303	-highlightthickness 0 \
304	-image [Rappture::icon zoom-in] \
305	-command [itcl::code $this Zoom in]
306	} {
307	usual
308	ignore -highlightthickness
309	}
310	pack $itk_component(zoomin) -side top -padx 2 -pady 2
311	Rappture::Tooltip::for $itk_component(zoomin) "Zoom in"
312
313	itk_component add zoomout {
314	button $f.zout -borderwidth 1 -padx 1 -pady 1 \
315	-highlightthickness 0 \
316	-image [Rappture::icon zoom-out] \
317	-command [itcl::code $this Zoom out]
318	} {
319	usual
320	ignore -highlightthickness
321	}
322	pack $itk_component(zoomout) -side top -padx 2 -pady 2
323	Rappture::Tooltip::for $itk_component(zoomout) "Zoom out"
324
325	itk_component add volume {
326	Rappture::PushButton $f.volume \
327	-onimage [Rappture::icon volume-on] \
328	-offimage [Rappture::icon volume-off] \
329	-variable [itcl::scope _settings(-volumevisible)] \
330	-command [itcl::code $this AdjustSetting -volumevisible]
331	}
332	$itk_component(volume) select
333	Rappture::Tooltip::for $itk_component(volume) \
334	"Don't display the volume"
335	pack $itk_component(volume) -padx 2 -pady 2
336
337	itk_component add cutplane {
338	Rappture::PushButton $f.cutplane \
339	-onimage [Rappture::icon cutbutton] \
340	-offimage [Rappture::icon cutbutton] \
341	-variable [itcl::scope _settings(-cutplanesvisible)] \
342	-command [itcl::code $this AdjustSetting -cutplanesvisible]
343	}
344	Rappture::Tooltip::for $itk_component(cutplane) \
345	"Show/Hide cutplanes"
346	pack $itk_component(cutplane) -padx 2 -pady 2
347
348	if { [catch {
349	BuildViewTab
350	BuildVolumeTab
351	BuildCutplanesTab
352	BuildAxisTab
353	BuildCameraTab
354	} errs] != 0 } {
355	puts stderr errs=$errs
356	}
357
358	# Legend
359	set _image(legend) [image create photo]
360	itk_component add legend {
361	canvas $itk_component(plotarea).legend -width 50 -highlightthickness 0
362	} {
363	usual
364	ignore -highlightthickness
365	rename -background -plotbackground plotBackground Background
366	}
367
368	# Hack around the Tk panewindow. The problem is that the requested
369	# size of the 3d view isn't set until an image is retrieved from
370	# the server. So the panewindow uses the tiny size.
371	set w 10000
372	pack forget $itk_component(view)
373	blt::table $itk_component(plotarea) \
374	0,0 $itk_component(view) -fill both -reqwidth $w
375	blt::table configure $itk_component(plotarea) c1 -resize none
376
377	# Bindings for rotation via mouse
378	bind $itk_component(view) <ButtonPress-1> \
379	[itcl::code $this Rotate click %x %y]
380	bind $itk_component(view) <B1-Motion> \
381	[itcl::code $this Rotate drag %x %y]
382	bind $itk_component(view) <ButtonRelease-1> \
383	[itcl::code $this Rotate release %x %y]
384
385	# Bindings for panning via mouse
386	bind $itk_component(view) <ButtonPress-2> \
387	[itcl::code $this Pan click %x %y]
388	bind $itk_component(view) <B2-Motion> \
389	[itcl::code $this Pan drag %x %y]
390	bind $itk_component(view) <ButtonRelease-2> \
391	[itcl::code $this Pan release %x %y]
392
393	#bind $itk_component(view) <ButtonRelease-3> \
394	# [itcl::code $this Pick %x %y]
395
396	# Bindings for panning via keyboard
397	bind $itk_component(view) <KeyPress-Left> \
398	[itcl::code $this Pan set -10 0]
399	bind $itk_component(view) <KeyPress-Right> \
400	[itcl::code $this Pan set 10 0]
401	bind $itk_component(view) <KeyPress-Up> \
402	[itcl::code $this Pan set 0 -10]
403	bind $itk_component(view) <KeyPress-Down> \
404	[itcl::code $this Pan set 0 10]
405	bind $itk_component(view) <Shift-KeyPress-Left> \
406	[itcl::code $this Pan set -2 0]
407	bind $itk_component(view) <Shift-KeyPress-Right> \
408	[itcl::code $this Pan set 2 0]
409	bind $itk_component(view) <Shift-KeyPress-Up> \
410	[itcl::code $this Pan set 0 -2]
411	bind $itk_component(view) <Shift-KeyPress-Down> \
412	[itcl::code $this Pan set 0 2]
413
414	# Bindings for zoom via keyboard
415	bind $itk_component(view) <KeyPress-Prior> \
416	[itcl::code $this Zoom out]
417	bind $itk_component(view) <KeyPress-Next> \
418	[itcl::code $this Zoom in]
419
420	bind $itk_component(view) <Enter> "focus $itk_component(view)"
421
422	if {[string equal "x11" [tk windowingsystem]]} {
423	# Bindings for zoom via mouse
424	bind $itk_component(view) <4> [itcl::code $this Zoom out]
425	bind $itk_component(view) <5> [itcl::code $this Zoom in]
426	}
427
428	set _image(download) [image create photo]
429
430	eval itk_initialize $args
431	Connect
432	}
433
434	# ----------------------------------------------------------------------
435	# DESTRUCTOR
436	# ----------------------------------------------------------------------
437	itcl::body Rappture::VtkVolumeViewer::destructor {} {
438	Disconnect
439	image delete $_image(plot)
440	image delete $_image(download)
441	catch { blt::arcball destroy $_arcball }
442	}
443
444	itcl::body Rappture::VtkVolumeViewer::DoResize {} {
445	if { $_width < 2 } {
446	set _width 500
447	}
448	if { $_height < 2 } {
449	set _height 500
450	}
451	set _start [clock clicks -milliseconds]
452	SendCmd "screen size $_width $_height"
453
454	EventuallyRequestLegend
455	set _resizePending 0
456	}
457
458	itcl::body Rappture::VtkVolumeViewer::DoRotate {} {
459	SendCmd "camera orient [ViewToQuaternion]"
460	set _rotatePending 0
461	}
462
463	itcl::body Rappture::VtkVolumeViewer::EventuallyResize { w h } {
464	set _width $w
465	set _height $h
466	$_arcball resize $w $h
467	if { !$_resizePending } {
468	set _resizePending 1
469	$_dispatcher event -after 400 !resize
470	}
471	}
472
473	itcl::body Rappture::VtkVolumeViewer::EventuallyRequestLegend {} {
474	if { !$_legendPending } {
475	set _legendPending 1
476	$_dispatcher event -idle !legend
477	}
478	}
479
480	set rotate_delay 100
481
482	itcl::body Rappture::VtkVolumeViewer::EventuallyRotate { q } {
483	QuaternionToView $q
484	if { !$_rotatePending } {
485	set _rotatePending 1
486	global rotate_delay
487	$_dispatcher event -after $rotate_delay !rotate
488	}
489	}
490
491	itcl::body Rappture::VtkVolumeViewer::EventuallySetCutplane { axis args } {
492	if { !$_cutplanePending } {
493	set _cutplanePending 1
494	$_dispatcher event -after 100 !${axis}cutplane
495	}
496	}
497
498	# ----------------------------------------------------------------------
499	# USAGE: add <dataobj> ?<settings>?
500	#
501	# Clients use this to add a data object to the plot. The optional
502	# <settings> are used to configure the plot. Allowed settings are
503	# -color, -brightness, -width, -linestyle, and -raise.
504	# ----------------------------------------------------------------------
505	itcl::body Rappture::VtkVolumeViewer::add {dataobj {settings ""}} {
506	DebugTrace "Enter"
507	if { ![IsValidObject $dataobj] } {
508	DebugTrace "Invalid"
509	return; # Ignore invalid objects.
510	}
511	array set params {
512	-color auto
513	-width 1
514	-linestyle solid
515	-brightness 0
516	-raise 0
517	-description ""
518	-param ""
519	-type ""
520	}
521	array set params $settings
522	set params(-description) ""
523	set params(-param) ""
524	array set params $settings
525
526	if {$params(-color) == "auto" \|\| $params(-color) == "autoreset"} {
527	# can't handle -autocolors yet
528	set params(-color) black
529	}
530	set pos [lsearch -exact $_dlist $dataobj]
531	if {$pos < 0} {
532	lappend _dlist $dataobj
533	}
534	set _obj2ovride($dataobj-color) $params(-color)
535	set _obj2ovride($dataobj-width) $params(-width)
536	set _obj2ovride($dataobj-raise) $params(-raise)
537	$_dispatcher event -idle !rebuild
538	}
539
540
541	# ----------------------------------------------------------------------
542	# USAGE: delete ?<dataobj1> <dataobj2> ...?
543	#
544	# Clients use this to delete a dataobj from the plot. If no dataobjs
545	# are specified, then all dataobjs are deleted. No data objects are
546	# deleted. They are only removed from the display list.
547	# ----------------------------------------------------------------------
548	itcl::body Rappture::VtkVolumeViewer::delete {args} {
549	DebugTrace "Enter"
550	if { [llength $args] == 0} {
551	set args $_dlist
552	}
553	# Delete all specified dataobjs
554	set changed 0
555	foreach dataobj $args {
556	set pos [lsearch -exact $_dlist $dataobj]
557	if { $pos < 0 } {
558	continue; # Don't know anything about it.
559	}
560	# Remove it from the dataobj list.
561	set _dlist [lreplace $_dlist $pos $pos]
562	array unset _obj2ovride $dataobj-*
563	array unset _settings $dataobj-*
564	set changed 1
565	}
566	# If anything changed, then rebuild the plot
567	if { $changed } {
568	$_dispatcher event -idle !rebuild
569	}
570	}
571
572	# ----------------------------------------------------------------------
573	# USAGE: get ?-objects?
574	# USAGE: get ?-visible?
575	# USAGE: get ?-image view?
576	#
577	# Clients use this to query the list of objects being plotted, in
578	# order from bottom to top of this result. The optional "-image"
579	# flag can also request the internal images being shown.
580	# ----------------------------------------------------------------------
581	itcl::body Rappture::VtkVolumeViewer::get {args} {
582	if {[llength $args] == 0} {
583	set args "-objects"
584	}
585
586	set op [lindex $args 0]
587	switch -- $op {
588	"-objects" {
589	# put the dataobj list in order according to -raise options
590	set dlist {}
591	foreach dataobj $_dlist {
592	if { ![IsValidObject $dataobj] } {
593	continue
594	}
595	if {[info exists _obj2ovride($dataobj-raise)] &&
596	$_obj2ovride($dataobj-raise)} {
597	set dlist [linsert $dlist 0 $dataobj]
598	} else {
599	lappend dlist $dataobj
600	}
601	}
602	return $dlist
603	}
604	"-visible" {
605	set dlist {}
606	foreach dataobj $_dlist {
607	if { ![IsValidObject $dataobj] } {
608	continue
609	}
610	if { ![info exists _obj2ovride($dataobj-raise)] } {
611	# No setting indicates that the object isn't visible.
612	continue
613	}
614	# Otherwise use the -raise parameter to put the object to
615	# the front of the list.
616	if { $_obj2ovride($dataobj-raise) } {
617	set dlist [linsert $dlist 0 $dataobj]
618	} else {
619	lappend dlist $dataobj
620	}
621	}
622	return $dlist
623	}
624	-image {
625	if {[llength $args] != 2} {
626	error "wrong # args: should be \"get -image view\""
627	}
628	switch -- [lindex $args end] {
629	view {
630	return $_image(plot)
631	}
632	default {
633	error "bad image name \"[lindex $args end]\": should be view"
634	}
635	}
636	}
637	default {
638	error "bad option \"$op\": should be -objects or -image"
639	}
640	}
641	}
642
643	# ----------------------------------------------------------------------
644	# USAGE: scale ?<data1> <data2> ...?
645	#
646	# Sets the default limits for the overall plot according to the
647	# limits of the data for all of the given <data> objects. This
648	# accounts for all objects--even those not showing on the screen.
649	# Because of this, the limits are appropriate for all objects as
650	# the user scans through data in the ResultSet viewer.
651	# ----------------------------------------------------------------------
652	itcl::body Rappture::VtkVolumeViewer::scale {args} {
653	DebugTrace "Enter"
654	array unset _limits
655	array unset _volcomponents
656	set _componentsList ""
657
658	foreach dataobj $args {
659	if { ![$dataobj isvalid] } {
660	continue; # Object doesn't contain valid data.
661	}
662	# Determine limits for each axis.
663	foreach axis { x y z } {
664	set lim [$dataobj limits $axis]
665	if { ![info exists _limits($axis)] } {
666	set _limits($axis) $lim
667	continue
668	}
669	foreach {min max} $lim break
670	foreach {amin amax} $_limits($axis) break
671	if { $amin > $min } {
672	set amin $min
673	}
674	if { $amax < $max } {
675	set amax $max
676	}
677	set _limits($axis) [list $amin $amax]
678	}
679	# Determine limits for each field.
680	foreach { fname lim } [$dataobj fieldlimits] {
681	if { ![info exists _limits($fname)] } {
682	set _limits($fname) $lim
683	continue
684	}
685	foreach {min max} $lim break
686	foreach {fmin fmax} $_limits($fname) break
687	if { $fmin > $min } {
688	set fmin $min
689	}
690	if { $fmax < $max } {
691	set fmax $max
692	}
693	set _limits($fname) [list $fmin $fmax]
694	}
695	# Get limits for each component.
696	foreach cname [$dataobj components] {
697	if { ![info exists _volcomponents($cname)] } {
698	lappend _componentsList $cname
699	}
700	lappend _volcomponents($cname) $dataobj-$cname
701	array unset limits
702	array set limits [$dataobj valueLimits $cname]
703	if { ![info exists _limits($cname)] } {
704	set _limits($cname) $limits(v)
705	continue
706	}
707	foreach {min max} $limits(v) break
708	foreach {vmin vmax} $_limits($cname) break
709	if { $vmin > $min } {
710	set vmin $min
711	}
712	if { $vmax < $max } {
713	set vmax $max
714	}
715	set _limits($cname) [list $vmin $vmax]
716	}
717	}
718	}
719
720	# ----------------------------------------------------------------------
721	# USAGE: download coming
722	# USAGE: download controls <downloadCommand>
723	# USAGE: download now
724	#
725	# Clients use this method to create a downloadable representation
726	# of the plot. Returns a list of the form {ext string}, where
727	# "ext" is the file extension (indicating the type of data) and
728	# "string" is the data itself.
729	# ----------------------------------------------------------------------
730	itcl::body Rappture::VtkVolumeViewer::download {option args} {
731	switch $option {
732	coming {
733	if {[catch {
734	blt::winop snap $itk_component(plotarea) $_image(download)
735	}]} {
736	$_image(download) configure -width 1 -height 1
737	$_image(download) put #000000
738	}
739	}
740	controls {
741	set popup .vtkviewerdownload
742	if { ![winfo exists .vtkviewerdownload] } {
743	set inner [BuildDownloadPopup $popup [lindex $args 0]]
744	} else {
745	set inner [$popup component inner]
746	}
747	set _downloadPopup(image_controls) $inner.image_frame
748	set num [llength [get]]
749	set num [expr {($num == 1) ? "1 result" : "$num results"}]
750	set word [Rappture::filexfer::label downloadWord]
751	$inner.summary configure -text "$word $num in the following format:"
752	update idletasks ;# Fix initial sizes
753	return $popup
754	}
755	now {
756	set popup .vtkviewerdownload
757	if {[winfo exists .vtkviewerdownload]} {
758	$popup deactivate
759	}
760	switch -- $_downloadPopup(format) {
761	"image" {
762	return [$this GetImage [lindex $args 0]]
763	}
764	"vtk" {
765	return [$this GetVtkData [lindex $args 0]]
766	}
767	}
768	return ""
769	}
770	default {
771	error "bad option \"$option\": should be coming, controls, now"
772	}
773	}
774	}
775
776	# ----------------------------------------------------------------------
777	# USAGE: Connect ?<host:port>,<host:port>...?
778	#
779	# Clients use this method to establish a connection to a new
780	# server, or to reestablish a connection to the previous server.
781	# Any existing connection is automatically closed.
782	# ----------------------------------------------------------------------
783	itcl::body Rappture::VtkVolumeViewer::Connect {} {
784	set _hosts [GetServerList "vtkvis"]
785	if { "" == $_hosts } {
786	return 0
787	}
788	set _reset 1
789	set result [VisViewer::Connect $_hosts]
790	if { $result } {
791	if { $_reportClientInfo } {
792	# Tell the server the viewer, hub, user and session.
793	# Do this immediately on connect before buffering any commands
794	global env
795
796	set info {}
797	set user "???"
798	if { [info exists env(USER)] } {
799	set user $env(USER)
800	}
801	set session "???"
802	if { [info exists env(SESSION)] } {
803	set session $env(SESSION)
804	}
805	lappend info "version" "$Rappture::version"
806	lappend info "build" "$Rappture::build"
807	lappend info "svnurl" "$Rappture::svnurl"
808	lappend info "installdir" "$Rappture::installdir"
809	lappend info "hub" [exec hostname]
810	lappend info "client" "vtkvolumeviewer"
811	lappend info "user" $user
812	lappend info "session" $session
813	SendCmd "clientinfo [list $info]"
814	}
815
816	set w [winfo width $itk_component(view)]
817	set h [winfo height $itk_component(view)]
818	EventuallyResize $w $h
819	}
820	return $result
821	}
822
823	#
824	# isconnected --
825	#
826	# Indicates if we are currently connected to the visualization server.
827	#
828	itcl::body Rappture::VtkVolumeViewer::isconnected {} {
829	return [VisViewer::IsConnected]
830	}
831
832	#
833	# disconnect --
834	#
835	itcl::body Rappture::VtkVolumeViewer::disconnect {} {
836	Disconnect
837	set _reset 1
838	}
839
840	#
841	# Disconnect --
842	#
843	# Clients use this method to disconnect from the current rendering server.
844	#
845	itcl::body Rappture::VtkVolumeViewer::Disconnect {} {
846	VisViewer::Disconnect
847
848	$_dispatcher cancel !rebuild
849	$_dispatcher cancel !resize
850	$_dispatcher cancel !rotate
851	$_dispatcher cancel !xcutplane
852	$_dispatcher cancel !ycutplane
853	$_dispatcher cancel !zcutplane
854	$_dispatcher cancel !legend
855	# disconnected -- no more data sitting on server
856	array unset _datasets
857	array unset _colormaps
858	array unset _dataset2style
859
860	set _resizePending 0
861	set _rotatePending 0
862	set _cutplanePending 0
863	set _legendPending 0
864	}
865
866	# ----------------------------------------------------------------------
867	# USAGE: ReceiveImage -bytes <size> -type <type> -token <token>
868	#
869	# Invoked automatically whenever the "image" command comes in from
870	# the rendering server. Indicates that binary image data with the
871	# specified <size> will follow.
872	# ----------------------------------------------------------------------
873	itcl::body Rappture::VtkVolumeViewer::ReceiveImage { args } {
874	array set info {
875	-token "???"
876	-bytes 0
877	-type image
878	}
879	array set info $args
880	set bytes [ReceiveBytes $info(-bytes)]
881	StopWaiting
882	if { $info(-type) == "image" } {
883	if 0 {
884	set f [open "last.ppm" "w"]
885	fconfigure $f -encoding binary
886	puts -nonewline $f $bytes
887	close $f
888	}
889	$_image(plot) configure -data $bytes
890	#puts stderr "[clock format [clock seconds]]: received image [image width $_image(plot)]x[image height $_image(plot)] image>"
891	if { $_start > 0 } {
892	set finish [clock clicks -milliseconds]
893	#puts stderr "round trip time [expr $finish -$_start] milliseconds"
894	set _start 0
895	}
896	} elseif { $info(type) == "print" } {
897	set tag $this-print-$info(-token)
898	set _hardcopy($tag) $bytes
899	}
900	}
901
902	#
903	# ReceiveDataset --
904	#
905	itcl::body Rappture::VtkVolumeViewer::ReceiveDataset { args } {
906	if { ![isconnected] } {
907	return
908	}
909	set option [lindex $args 0]
910	switch -- $option {
911	"scalar" {
912	set option [lindex $args 1]
913	switch -- $option {
914	"world" {
915	foreach { x y z value tag } [lrange $args 2 end] break
916	}
917	"pixel" {
918	foreach { x y value tag } [lrange $args 2 end] break
919	}
920	}
921	}
922	"vector" {
923	set option [lindex $args 1]
924	switch -- $option {
925	"world" {
926	foreach { x y z vx vy vz tag } [lrange $args 2 end] break
927	}
928	"pixel" {
929	foreach { x y vx vy vz tag } [lrange $args 2 end] break
930	}
931	}
932	}
933	"names" {
934	foreach { name } [lindex $args 1] {
935	#puts stderr "Dataset: $name"
936	}
937	}
938	default {
939	error "unknown dataset option \"$option\" from server"
940	}
941	}
942	}
943
944	# ----------------------------------------------------------------------
945	# USAGE: Rebuild
946	#
947	# Called automatically whenever something changes that affects the
948	# data in the widget. Clears any existing data and rebuilds the
949	# widget to display new data.
950	# ----------------------------------------------------------------------
951	itcl::body Rappture::VtkVolumeViewer::Rebuild {} {
952	set w [winfo width $itk_component(view)]
953	set h [winfo height $itk_component(view)]
954	if { $w < 2 \|\| $h < 2 } {
955	update
956	$_dispatcher event -idle !rebuild
957	return
958	}
959
960	# Turn on buffering of commands to the server. We don't want to
961	# be preempted by a server disconnect/reconnect (which automatically
962	# generates a new call to Rebuild).
963	StartBufferingCommands
964
965	if { $_width != $w \|\| $_height != $h \|\| $_reset } {
966	set _width $w
967	set _height $h
968	$_arcball resize $w $h
969	DoResize
970	}
971	if { $_reset } {
972	#
973	# Reset the camera and other view parameters
974	#
975	$_arcball quaternion [ViewToQuaternion]
976	if {$_view(-ortho)} {
977	SendCmd "camera mode ortho"
978	} else {
979	SendCmd "camera mode persp"
980	}
981	DoRotate
982	PanCamera
983	set _first ""
984	InitSettings -background \
985	-xgrid -ygrid -zgrid -axisflymode \
986	-axesvisible -axislabels -axisminorticks
987	StopBufferingCommands
988	SendCmd "imgflush"
989	StartBufferingCommands
990	}
991
992	set _first ""
993	# No volumes are active (i.e. in the working set of displayed volumes).
994	# A volume is always invisible if it's not in the working set. A
995	# volume in the working set may be visible/invisible depending upon the
996	# global visibility value.
997	SendCmd "dataset visible 0"
998	foreach dataobj [get -objects] {
999	if { [info exists _obj2ovride($dataobj-raise)] && $_first == "" } {
1000	set _first $dataobj
1001	}
1002	foreach cname [$dataobj components] {
1003	set tag $dataobj-$cname
1004	if { ![info exists _datasets($tag)] } {
1005	set bytes [$dataobj vtkdata $cname]
1006	if 0 {
1007	set f [open /tmp/vtkvolume.vtk "w"]
1008	fconfigure $f -translation binary -encoding binary
1009	puts -nonewline $f $bytes
1010	close $f
1011	}
1012	set length [string length $bytes]
1013	if { $_reportClientInfo } {
1014	set info {}
1015	lappend info "tool_id" [$dataobj hints toolid]
1016	lappend info "tool_name" [$dataobj hints toolname]
1017	lappend info "tool_title" [$dataobj hints tooltitle]
1018	lappend info "tool_command" [$dataobj hints toolcommand]
1019	lappend info "tool_revision" [$dataobj hints toolrevision]
1020	lappend info "dataset_label" [$dataobj hints label]
1021	lappend info "dataset_size" $length
1022	lappend info "dataset_tag" $tag
1023	SendCmd "clientinfo [list $info]"
1024	}
1025	SendCmd "dataset add $tag data follows $length"
1026	SendData $bytes
1027	set _datasets($tag) 1
1028	SetObjectStyle $dataobj $cname
1029	}
1030	if { [info exists _obj2ovride($dataobj-raise)] } {
1031	SendCmd "volume visible 1 $tag"
1032	}
1033	break
1034	}
1035	}
1036	if {"" != $_first} {
1037	foreach axis { x y z } {
1038	set label [$_first hints ${axis}label]
1039	if { $label != "" } {
1040	SendCmd [list axis name $axis $label]
1041	}
1042	set units [$_first hints ${axis}units]
1043	if { $units != "" } {
1044	SendCmd [list axis units $axis $units]
1045	}
1046	}
1047	$itk_component(field) choices delete 0 end
1048	$itk_component(fieldmenu) delete 0 end
1049	array unset _fields
1050	set _curFldName ""
1051	foreach cname [$_first components] {
1052	foreach fname [$_first fieldnames $cname] {
1053	if { [info exists _fields($fname)] } {
1054	continue
1055	}
1056	foreach { label units components } \
1057	[$_first fieldinfo $fname] break
1058	# Only scalar fields are valid
1059	if {$_allowMultiComponent \|\| $components == 1} {
1060	$itk_component(field) choices insert end "$fname" "$label"
1061	$itk_component(fieldmenu) add radiobutton -label "$label" \
1062	-value $label -variable [itcl::scope _curFldLabel] \
1063	-selectcolor red \
1064	-activebackground $itk_option(-plotbackground) \
1065	-activeforeground $itk_option(-plotforeground) \
1066	-font "Arial 8" \
1067	-command [itcl::code $this Combo invoke]
1068	set _fields($fname) [list $label $units $components]
1069	if { $_curFldName == "" } {
1070	set _curFldName $fname
1071	set _curFldLabel $label
1072	}
1073	}
1074	}
1075	}
1076	$itk_component(field) value $_curFldLabel
1077	}
1078
1079	InitSettings -color \
1080	-volumevisible \
1081	-volumematerial \
1082	-volumelighting -volumeopacity -volumequality -volumeoutline \
1083	-cutplanesvisible \
1084	-xcutplaneposition -ycutplaneposition -zcutplaneposition \
1085	-xcutplanevisible -ycutplanevisible -zcutplanevisible
1086
1087	if { $_reset } {
1088	SendCmd "camera reset"
1089	SendCmd "camera zoom $_view(-zoom)"
1090	RequestLegend
1091	set _reset 0
1092	}
1093	# Actually write the commands to the server socket. If it fails, we don't
1094	# care. We're finished here.
1095	blt::busy hold $itk_component(hull)
1096	StopBufferingCommands
1097	blt::busy release $itk_component(hull)
1098	}
1099
1100	# ----------------------------------------------------------------------
1101	# USAGE: CurrentDatasets ?-all -visible? ?dataobjs?
1102	#
1103	# Returns a list of server IDs for the current datasets being displayed. This
1104	# is normally a single ID, but it might be a list of IDs if the current data
1105	# object has multiple components.
1106	# ----------------------------------------------------------------------
1107	itcl::body Rappture::VtkVolumeViewer::CurrentDatasets {args} {
1108	set flag [lindex $args 0]
1109	switch -- $flag {
1110	"-all" {
1111	if { [llength $args] > 1 } {
1112	error "CurrentDatasets: can't specify dataobj after \"-all\""
1113	}
1114	set dlist [get -objects]
1115	}
1116	"-visible" {
1117	if { [llength $args] > 1 } {
1118	set dlist {}
1119	set args [lrange $args 1 end]
1120	foreach dataobj $args {
1121	if { [info exists _obj2ovride($dataobj-raise)] } {
1122	lappend dlist $dataobj
1123	}
1124	}
1125	} else {
1126	set dlist [get -visible]
1127	}
1128	}
1129	default {
1130	set dlist $args
1131	}
1132	}
1133	set rlist ""
1134	foreach dataobj $dlist {
1135	foreach comp [$dataobj components] {
1136	set tag $dataobj-$comp
1137	if { [info exists _datasets($tag)] && $_datasets($tag) } {
1138	lappend rlist $tag
1139	}
1140	}
1141	}
1142	return $rlist
1143	}
1144
1145	# ----------------------------------------------------------------------
1146	# USAGE: Zoom in
1147	# USAGE: Zoom out
1148	# USAGE: Zoom reset
1149	#
1150	# Called automatically when the user clicks on one of the zoom
1151	# controls for this widget. Changes the zoom for the current view.
1152	# ----------------------------------------------------------------------
1153	itcl::body Rappture::VtkVolumeViewer::Zoom {option} {
1154	switch -- $option {
1155	"in" {
1156	set _view(-zoom) [expr {$_view(-zoom)*1.25}]
1157	SendCmd "camera zoom $_view(-zoom)"
1158	}
1159	"out" {
1160	set _view(-zoom) [expr {$_view(-zoom)*0.8}]
1161	SendCmd "camera zoom $_view(-zoom)"
1162	}
1163	"reset" {
1164	array set _view {
1165	-qw 0.853553
1166	-qx -0.353553
1167	-qy 0.353553
1168	-qz 0.146447
1169	-xpan 0
1170	-ypan 0
1171	-zoom 1.0
1172	}
1173	if { $_first != "" } {
1174	set location [$_first hints camera]
1175	if { $location != "" } {
1176	array set _view $location
1177	}
1178	}
1179	$_arcball quaternion [ViewToQuaternion]
1180	DoRotate
1181	SendCmd "camera reset"
1182	}
1183	}
1184	}
1185
1186	itcl::body Rappture::VtkVolumeViewer::PanCamera {} {
1187	set x $_view(-xpan)
1188	set y $_view(-ypan)
1189	SendCmd "camera pan $x $y"
1190	}
1191
1192	# ----------------------------------------------------------------------
1193	# USAGE: Rotate click <x> <y>
1194	# USAGE: Rotate drag <x> <y>
1195	# USAGE: Rotate release <x> <y>
1196	#
1197	# Called automatically when the user clicks/drags/releases in the
1198	# plot area. Moves the plot according to the user's actions.
1199	# ----------------------------------------------------------------------
1200	itcl::body Rappture::VtkVolumeViewer::Rotate {option x y} {
1201	switch -- $option {
1202	"click" {
1203	$itk_component(view) configure -cursor fleur
1204	set _click(x) $x
1205	set _click(y) $y
1206	}
1207	"drag" {
1208	if {[array size _click] == 0} {
1209	Rotate click $x $y
1210	} else {
1211	set w [winfo width $itk_component(view)]
1212	set h [winfo height $itk_component(view)]
1213	if {$w <= 0 \|\| $h <= 0} {
1214	return
1215	}
1216
1217	if {[catch {
1218	# this fails sometimes for no apparent reason
1219	set dx [expr {double($x-$_click(x))/$w}]
1220	set dy [expr {double($y-$_click(y))/$h}]
1221	}]} {
1222	return
1223	}
1224	if { $dx == 0 && $dy == 0 } {
1225	return
1226	}
1227	set q [$_arcball rotate $x $y $_click(x) $_click(y)]
1228	EventuallyRotate $q
1229	set _click(x) $x
1230	set _click(y) $y
1231	}
1232	}
1233	"release" {
1234	Rotate drag $x $y
1235	$itk_component(view) configure -cursor ""
1236	catch {unset _click}
1237	}
1238	default {
1239	error "bad option \"$option\": should be click, drag, release"
1240	}
1241	}
1242	}
1243
1244	itcl::body Rappture::VtkVolumeViewer::Pick {x y} {
1245	foreach tag [CurrentDatasets -visible] {
1246	SendCmd "dataset getscalar pixel $x $y $tag"
1247	}
1248	}
1249
1250	# ----------------------------------------------------------------------
1251	# USAGE: $this Pan click x y
1252	# $this Pan drag x y
1253	# $this Pan release x y
1254	#
1255	# Called automatically when the user clicks on one of the zoom
1256	# controls for this widget. Changes the zoom for the current view.
1257	# ----------------------------------------------------------------------
1258	itcl::body Rappture::VtkVolumeViewer::Pan {option x y} {
1259	switch -- $option {
1260	"set" {
1261	set w [winfo width $itk_component(view)]
1262	set h [winfo height $itk_component(view)]
1263	set x [expr $x / double($w)]
1264	set y [expr $y / double($h)]
1265	set _view(-xpan) [expr $_view(-xpan) + $x]
1266	set _view(-ypan) [expr $_view(-ypan) + $y]
1267	PanCamera
1268	return
1269	}
1270	"click" {
1271	set _click(x) $x
1272	set _click(y) $y
1273	$itk_component(view) configure -cursor hand1
1274	}
1275	"drag" {
1276	if { ![info exists _click(x)] } {
1277	set _click(x) $x
1278	}
1279	if { ![info exists _click(y)] } {
1280	set _click(y) $y
1281	}
1282	set w [winfo width $itk_component(view)]
1283	set h [winfo height $itk_component(view)]
1284	set dx [expr ($_click(x) - $x)/double($w)]
1285	set dy [expr ($_click(y) - $y)/double($h)]
1286	set _click(x) $x
1287	set _click(y) $y
1288	set _view(-xpan) [expr $_view(-xpan) - $dx]
1289	set _view(-ypan) [expr $_view(-ypan) - $dy]
1290	PanCamera
1291	}
1292	"release" {
1293	Pan drag $x $y
1294	$itk_component(view) configure -cursor ""
1295	}
1296	default {
1297	error "unknown option \"$option\": should set, click, drag, or release"
1298	}
1299	}
1300	}
1301
1302	# ----------------------------------------------------------------------
1303	# USAGE: InitSettings <what> ?<value>?
1304	#
1305	# Used internally to update rendering settings whenever parameters
1306	# change in the popup settings panel. Sends the new settings off
1307	# to the back end.
1308	# ----------------------------------------------------------------------
1309	itcl::body Rappture::VtkVolumeViewer::InitSettings { args } {
1310	foreach spec $args {
1311	if { [info exists _settings($_first${spec})] } {
1312	# Reset global setting with dataobj specific setting
1313	set _settings($spec) $_settings($_first${spec})
1314	}
1315	AdjustSetting $spec
1316	}
1317	}
1318
1319	#
1320	# AdjustSetting --
1321	#
1322	# Changes/updates a specific setting in the widget. There are
1323	# usually user-setable option. Commands are sent to the render
1324	# server.
1325	#
1326	itcl::body Rappture::VtkVolumeViewer::AdjustSetting {what {value ""}} {
1327	if { ![isconnected] } {
1328	return
1329	}
1330	switch -- $what {
1331	"-background" {
1332	set bgcolor [$itk_component(background) value]
1333	set _settings($what) $bgcolor
1334	array set fgcolors {
1335	"black" "white"
1336	"white" "black"
1337	"grey" "black"
1338	}
1339	configure -plotbackground $bgcolor \
1340	-plotforeground $fgcolors($bgcolor)
1341	$itk_component(view) delete "legend"
1342	DrawLegend
1343	}
1344	"-volumeoutline" {
1345	set bool $_settings($what)
1346	SendCmd "outline visible 0"
1347	foreach tag [CurrentDatasets -visible] {
1348	SendCmd "outline visible $bool $tag"
1349	}
1350	}
1351	"-legendvisible" {
1352	DrawLegend
1353	}
1354	"-volumevisible" {
1355	set bool $_settings($what)
1356	foreach tag [CurrentDatasets -visible] {
1357	SendCmd "volume visible $bool $tag"
1358	}
1359	if { $bool } {
1360	Rappture::Tooltip::for $itk_component(volume) \
1361	"Hide the volume"
1362	} else {
1363	Rappture::Tooltip::for $itk_component(volume) \
1364	"Show the volume"
1365	}
1366	}
1367	"-volumematerial" {
1368	set val $_settings($what)
1369	set diffuse [expr {0.01*$val}]
1370	set specular [expr {0.01*$val}]
1371	#set power [expr {sqrt(160*$val+1.0)}]
1372	set power [expr {$val+1.0}]
1373	foreach tag [CurrentDatasets -visible] {
1374	SendCmd "volume shading diffuse $diffuse $tag"
1375	SendCmd "volume shading specular $specular $power $tag"
1376	}
1377	}
1378	"-volumelighting" {
1379	set bool $_settings($what)
1380	foreach tag [CurrentDatasets -visible] {
1381	SendCmd "volume lighting $bool $tag"
1382	}
1383	}
1384	"-volumeopacity" {
1385	set val $_settings($what)
1386	set val [expr {0.01*$val}]
1387	foreach tag [CurrentDatasets -visible] {
1388	SendCmd "volume opacity $val $tag"
1389	}
1390	}
1391	"-volumequality" {
1392	set val $_settings($what)
1393	set val [expr {0.01*$val}]
1394	foreach tag [CurrentDatasets -visible] {
1395	SendCmd "volume quality $val $tag"
1396	}
1397	}
1398	"-axesvisible" {
1399	set bool $_settings($what)
1400	SendCmd "axis visible all $bool"
1401	}
1402	"-axislabels" {
1403	set bool $_settings($what)
1404	SendCmd "axis labels all $bool"
1405	}
1406	"-axisminorticks" {
1407	set bool $_settings($what)
1408	SendCmd "axis minticks all $bool"
1409	}
1410	"-xgrid" - "-ygrid" - "-zgrid" {
1411	set axis [string range $what 1 1]
1412	set bool $_settings($what)
1413	SendCmd "axis grid $axis $bool"
1414	}
1415	"-axisflymode" {
1416	set mode [$itk_component(axismode) value]
1417	set mode [$itk_component(axismode) translate $mode]
1418	set _settings($what) $mode
1419	SendCmd "axis flymode $mode"
1420	}
1421	"-cutplanesvisible" {
1422	set bool $_settings($what)
1423	foreach dataset [CurrentDatasets -visible] {
1424	SendCmd "$_cutplaneCmd visible $bool $dataset"
1425	}
1426	}
1427	"-cutplanelighting" {
1428	set bool $_settings($what)
1429	foreach dataset [CurrentDatasets -visible] {
1430	if {$_cutplaneCmd != "imgcutplane"} {
1431	SendCmd "$_cutplaneCmd lighting $bool $dataset"
1432	} else {
1433	if {$bool} {
1434	set ambient 0.0
1435	set diffuse 1.0
1436	} else {
1437	set ambient 1.0
1438	set diffuse 0.0
1439	}
1440	SendCmd "imgcutplane material $ambient $diffuse $dataset"
1441	}
1442	}
1443	}
1444	"-cutplaneopacity" {
1445	set val $_settings($what)
1446	set sval [expr { 0.01 * double($val) }]
1447	foreach dataset [CurrentDatasets -visible] {
1448	SendCmd "$_cutplaneCmd opacity $sval $dataset"
1449	}
1450	}
1451	"-xcutplanevisible" - "-ycutplanevisible" - "-zcutplanevisible" {
1452	set axis [string range $what 1 1]
1453	set bool $_settings($what)
1454	if { $bool } {
1455	$itk_component(${axis}CutScale) configure -state normal \
1456	-troughcolor white
1457	} else {
1458	$itk_component(${axis}CutScale) configure -state disabled \
1459	-troughcolor grey82
1460	}
1461	foreach dataset [CurrentDatasets -visible] {
1462	SendCmd "$_cutplaneCmd axis $axis $bool $dataset"
1463	}
1464	}
1465	"-xcutplaneposition" - "-ycutplaneposition" - "-zcutplaneposition" {
1466	set axis [string range $what 1 1]
1467	set pos [expr $_settings($what) * 0.01]
1468	foreach dataset [CurrentDatasets -visible] {
1469	SendCmd "$_cutplaneCmd slice ${axis} ${pos} $dataset"
1470	}
1471	set _cutplanePending 0
1472	}
1473	"-color" {
1474	set color [$itk_component(colormap) value]
1475	set _settings($what) $color
1476	foreach dataset [CurrentDatasets -visible $_first] {
1477	foreach {dataobj comp} [split $dataset -] break
1478	ChangeColormap $dataobj $comp $color
1479	}
1480	EventuallyRequestLegend
1481	}
1482	"-field" {
1483	set label [$itk_component(field) value]
1484	set fname [$itk_component(field) translate $label]
1485	set _settings($what) $fname
1486	if { [info exists _fields($fname)] } {
1487	foreach { label units components } $_fields($fname) break
1488	if { !$_allowMultiComponent && $components > 1 } {
1489	puts stderr "Can't use a vector field in a volume"
1490	return
1491	} else {
1492	if { $components > 1 } {
1493	set _colorMode vmag
1494	} else {
1495	set _colorMode scalar
1496	}
1497	}
1498	set _curFldName $fname
1499	set _curFldLabel $label
1500	} else {
1501	puts stderr "unknown field \"$fname\""
1502	return
1503	}
1504	foreach dataset [CurrentDatasets -visible $_first] {
1505	#SendCmd "$_cutplaneCmd colormode $_colorMode $_curFldName $dataset"
1506	SendCmd "dataset scalar $_curFldName $dataset"
1507	}
1508	SendCmd "camera reset"
1509	DrawLegend
1510	}
1511	default {
1512	error "don't know how to fix $what"
1513	}
1514	}
1515	}
1516
1517	#
1518	# RequestLegend --
1519	#
1520	# Request a new legend from the server. The size of the legend
1521	# is determined from the height of the canvas.
1522	#
1523	itcl::body Rappture::VtkVolumeViewer::RequestLegend {} {
1524	set _legendPending 0
1525	set font "Arial 8"
1526	set lineht [font metrics $font -linespace]
1527	set w 12
1528	set h [expr {$_height - 3 * ($lineht + 2)}]
1529	if { $h < 1 } {
1530	return
1531	}
1532	# Set the legend on the first dataset.
1533	foreach dataset [CurrentDatasets -visible $_first] {
1534	foreach {dataobj comp} [split $dataset -] break
1535	if { [info exists _dataset2style($dataset)] } {
1536	#SendCmd "legend $_dataset2style($dataset) $_colorMode $_curFldName {} $w $h 0"
1537	SendCmd "legend2 $_dataset2style($dataset) $w $h"
1538	break;
1539	}
1540	}
1541	}
1542
1543	#
1544	# ChangeColormap --
1545	#
1546	itcl::body Rappture::VtkVolumeViewer::ChangeColormap {dataobj comp color} {
1547	set tag $dataobj-$comp
1548	if { ![info exist _style($tag)] } {
1549	error "no initial colormap"
1550	}
1551	array set style $_style($tag)
1552	set style(-color) $color
1553	set _style($tag) [array get style]
1554	SetColormap $dataobj $comp
1555	}
1556
1557	#
1558	# SetColormap --
1559	#
1560	itcl::body Rappture::VtkVolumeViewer::SetColormap { dataobj comp } {
1561	array set style {
1562	-color BCGYR
1563	-levels 6
1564	}
1565	set tag $dataobj-$comp
1566	if { ![info exists _initialStyle($tag)] } {
1567	# Save the initial component style.
1568	set _initialStyle($tag) [$dataobj style $comp]
1569	}
1570
1571	# Override defaults with initial style defined in xml.
1572	array set style $_initialStyle($tag)
1573
1574	if { ![info exists _style($tag)] } {
1575	set _style($tag) [array get style]
1576	}
1577	# Override initial style with current style.
1578	array set style $_style($tag)
1579
1580	set name "$style(-color):$style(-levels)"
1581	if { ![info exists _colormaps($name)] } {
1582	BuildColormap $name [array get style]
1583	set _colormaps($name) 1
1584	}
1585	if { ![info exists _dataset2style($tag)] \|\|
1586	$_dataset2style($tag) != $name } {
1587	SendCmd "volume colormap $name $tag"
1588	SendCmd "$_cutplaneCmd colormap $name-opaque $tag"
1589	set _dataset2style($tag) $name
1590	}
1591	}
1592
1593	#
1594	# BuildColormap --
1595	#
1596	# Alpha map is in the format: normalized_value opacity midpoint sharpness
1597	#
1598	itcl::body Rappture::VtkVolumeViewer::BuildColormap { name styles } {
1599	array set style $styles
1600	set cmap [ColorsToColormap $style(-color)]
1601	if { [llength $cmap] == 0 } {
1602	set cmap "0.0 0.0 0.0 0.0 1.0 1.0 1.0 1.0"
1603	}
1604
1605	set amap "0.0 0.0 0.5 0.0 1.0 1.0 0.5 0.0"
1606	set opaqueAmap "0.0 1.0 1.0 1.0"
1607	SendCmd [list colormap define $name $cmap -spline $amap]
1608	SendCmd [list colormap define $name-opaque $cmap $opaqueAmap]
1609	}
1610
1611	# ----------------------------------------------------------------------
1612	# CONFIGURATION OPTION: -plotbackground
1613	# ----------------------------------------------------------------------
1614	itcl::configbody Rappture::VtkVolumeViewer::plotbackground {
1615	if { [isconnected] } {
1616	set color $itk_option(-plotbackground)
1617	set rgb [Color2RGB $color]
1618	SendCmd "screen bgcolor $rgb"
1619	$itk_component(legend) configure -background $color
1620	}
1621	}
1622
1623	# ----------------------------------------------------------------------
1624	# CONFIGURATION OPTION: -plotforeground
1625	# ----------------------------------------------------------------------
1626	itcl::configbody Rappture::VtkVolumeViewer::plotforeground {
1627	if { [isconnected] } {
1628	set color $itk_option(-plotforeground)
1629	set rgb [Color2RGB $color]
1630	SendCmd "axis color all $rgb"
1631	SendCmd "outline color $rgb"
1632	SendCmd "$_cutplaneCmd color $rgb"
1633	$itk_component(legend) itemconfigure labels -fill $color
1634	$itk_component(legend) itemconfigure limits -fill $color
1635	}
1636	}
1637
1638	itcl::body Rappture::VtkVolumeViewer::BuildViewTab {} {
1639	set font [option get $itk_component(hull) font Font]
1640
1641	set inner [$itk_component(main) insert end \
1642	-title "View Settings" \
1643	-icon [Rappture::icon wrench]]
1644	$inner configure -borderwidth 4
1645
1646	checkbutton $inner.axes \
1647	-text "Axes" \
1648	-variable [itcl::scope _settings(-axesvisible)] \
1649	-command [itcl::code $this AdjustSetting -axesvisible] \
1650	-font $font
1651
1652	checkbutton $inner.outline \
1653	-text "Outline" \
1654	-variable [itcl::scope _settings(-volumeoutline)] \
1655	-command [itcl::code $this AdjustSetting -volumeoutline] \
1656	-font $font
1657
1658	checkbutton $inner.legend \
1659	-text "Legend" \
1660	-variable [itcl::scope _settings(-legendvisible)] \
1661	-command [itcl::code $this AdjustSetting -legendvisible] \
1662	-font $font
1663
1664	checkbutton $inner.volume \
1665	-text "Volume" \
1666	-variable [itcl::scope _settings(-volumevisible)] \
1667	-command [itcl::code $this AdjustSetting -volumevisible] \
1668	-font $font
1669
1670	label $inner.background_l -text "Background" -font $font
1671	itk_component add background {
1672	Rappture::Combobox $inner.background -width 10 -editable 0
1673	}
1674	$inner.background choices insert end \
1675	"black" "black" \
1676	"white" "white" \
1677	"grey" "grey"
1678
1679	$itk_component(background) value $_settings(-background)
1680	bind $inner.background <<Value>> \
1681	[itcl::code $this AdjustSetting -background]
1682
1683	blt::table $inner \
1684	0,0 $inner.axes -cspan 2 -anchor w \
1685	1,0 $inner.outline -cspan 2 -anchor w \
1686	2,0 $inner.volume -cspan 2 -anchor w \
1687	3,0 $inner.legend -cspan 2 -anchor w \
1688	4,0 $inner.background_l -anchor e -pady 2 \
1689	4,1 $inner.background -fill x
1690
1691	blt::table configure $inner r* -resize none
1692	blt::table configure $inner r5 -resize expand
1693	}
1694
1695	itcl::body Rappture::VtkVolumeViewer::BuildVolumeTab {} {
1696	set font [option get $itk_component(hull) font Font]
1697	#set bfont [option get $itk_component(hull) boldFont Font]
1698	set bfont "Arial 9 bold"
1699
1700	set inner [$itk_component(main) insert end \
1701	-title "Volume Settings" \
1702	-icon [Rappture::icon volume-on]]
1703	$inner configure -borderwidth 4
1704
1705	checkbutton $inner.visibility \
1706	-text "Visible" \
1707	-font $font \
1708	-variable [itcl::scope _settings(-volumevisible)] \
1709	-command [itcl::code $this AdjustSetting -volumevisible]
1710
1711	checkbutton $inner.lighting \
1712	-text "Enable Lighting" \
1713	-font $font \
1714	-variable [itcl::scope _settings(-volumelighting)] \
1715	-command [itcl::code $this AdjustSetting -volumelighting]
1716
1717	label $inner.dim_l -text "Dim" -font $font
1718	::scale $inner.material -from 0 -to 100 -orient horizontal \
1719	-variable [itcl::scope _settings(-volumematerial)] \
1720	-showvalue off \
1721	-command [itcl::code $this AdjustSetting -volumematerial]
1722	label $inner.bright_l -text "Bright" -font $font
1723
1724	label $inner.opacity_l -text "Opacity" -font $font
1725	::scale $inner.opacity -from 0 -to 100 -orient horizontal \
1726	-variable [itcl::scope _settings(-volumeopacity)] \
1727	-showvalue off \
1728	-command [itcl::code $this AdjustSetting -volumeopacity]
1729
1730	label $inner.quality_l -text "Quality" -font $font
1731	::scale $inner.quality -from 0 -to 100 -orient horizontal \
1732	-variable [itcl::scope _settings(-volumequality)] \
1733	-showvalue off \
1734	-command [itcl::code $this AdjustSetting -volumequality]
1735
1736	label $inner.field_l -text "Field" -font $font
1737	itk_component add field {
1738	Rappture::Combobox $inner.field -editable 0
1739	}
1740	bind $inner.field <<Value>> \
1741	[itcl::code $this AdjustSetting -field]
1742
1743	label $inner.colormap_l -text "Colormap" -font $font
1744	itk_component add colormap {
1745	Rappture::Combobox $inner.colormap -editable 0
1746	}
1747	$inner.colormap choices insert end [GetColormapList]
1748	bind $inner.colormap <<Value>> \
1749	[itcl::code $this AdjustSetting -color]
1750	$itk_component(colormap) value $_settings(-color)
1751
1752	blt::table $inner \
1753	0,0 $inner.field_l -anchor w -pady 2 \
1754	0,1 $inner.field -fill x -pady 2 -cspan 3 \
1755	1,0 $inner.visibility -anchor w -pady 2 -cspan 4 \
1756	2,0 $inner.lighting -anchor w -pady 2 -cspan 4 \
1757	3,0 $inner.dim_l -anchor e -pady 2 \
1758	3,1 $inner.material -fill x -pady 2 -cspan 2 \
1759	3,3 $inner.bright_l -anchor w -pady 2 \
1760	4,0 $inner.opacity_l -anchor w -pady 2 -cspan 4 \
1761	5,0 $inner.opacity -fill x -pady 2 -cspan 4 \
1762	6,0 $inner.quality_l -anchor w -pady 2 -cspan 4 \
1763	7,0 $inner.quality -fill x -pady 2 -cspan 4 \
1764	8,0 $inner.colormap_l -anchor w -pady 2 \
1765	8,1 $inner.colormap -fill x -pady 2 -cspan 3
1766
1767	blt::table configure $inner r* c0 c1 c3 -resize none
1768	blt::table configure $inner r9 c2 -resize expand
1769	}
1770
1771	itcl::body Rappture::VtkVolumeViewer::BuildAxisTab {} {
1772	set font [option get $itk_component(hull) font Font]
1773
1774	set inner [$itk_component(main) insert end \
1775	-title "Axis Settings" \
1776	-icon [Rappture::icon axis2]]
1777	$inner configure -borderwidth 4
1778
1779	checkbutton $inner.visible \
1780	-text "Axes" \
1781	-variable [itcl::scope _settings(-axesvisible)] \
1782	-command [itcl::code $this AdjustSetting -axesvisible] \
1783	-font $font
1784
1785	checkbutton $inner.labels \
1786	-text "Axis Labels" \
1787	-variable [itcl::scope _settings(-axislabels)] \
1788	-command [itcl::code $this AdjustSetting -axislabels] \
1789	-font $font
1790	label $inner.grid_l -text "Grid" -font $font
1791	checkbutton $inner.xgrid \
1792	-text "X" \
1793	-variable [itcl::scope _settings(-xgrid)] \
1794	-command [itcl::code $this AdjustSetting -xgrid] \
1795	-font $font
1796	checkbutton $inner.ygrid \
1797	-text "Y" \
1798	-variable [itcl::scope _settings(-ygrid)] \
1799	-command [itcl::code $this AdjustSetting -ygrid] \
1800	-font $font
1801	checkbutton $inner.zgrid \
1802	-text "Z" \
1803	-variable [itcl::scope _settings(-zgrid)] \
1804	-command [itcl::code $this AdjustSetting -zgrid] \
1805	-font $font
1806	checkbutton $inner.minorticks \
1807	-text "Minor Ticks" \
1808	-variable [itcl::scope _settings(-axisminorticks)] \
1809	-command [itcl::code $this AdjustSetting -axisminorticks] \
1810	-font $font
1811
1812	label $inner.mode_l -text "Mode" -font $font
1813
1814	itk_component add axismode {
1815	Rappture::Combobox $inner.mode -width 10 -editable 0
1816	}
1817	$inner.mode choices insert end \
1818	"static_triad" "static" \
1819	"closest_triad" "closest" \
1820	"furthest_triad" "farthest" \
1821	"outer_edges" "outer"
1822	$itk_component(axismode) value $_settings(-axisflymode)
1823	bind $inner.mode <<Value>> [itcl::code $this AdjustSetting -axisflymode]
1824
1825	blt::table $inner \
1826	0,0 $inner.visible -anchor w -cspan 4 \
1827	1,0 $inner.labels -anchor w -cspan 4 \
1828	2,0 $inner.minorticks -anchor w -cspan 4 \
1829	4,0 $inner.grid_l -anchor w \
1830	4,1 $inner.xgrid -anchor w \
1831	4,2 $inner.ygrid -anchor w \
1832	4,3 $inner.zgrid -anchor w \
1833	5,0 $inner.mode_l -anchor w -padx { 2 0 } \
1834	5,1 $inner.mode -fill x -cspan 3
1835
1836	blt::table configure $inner r* c* -resize none
1837	blt::table configure $inner r7 c6 -resize expand
1838	blt::table configure $inner r3 -height 0.125i
1839	}
1840
1841	itcl::body Rappture::VtkVolumeViewer::BuildCameraTab {} {
1842	set font [option get $itk_component(hull) font Font]
1843	set inner [$itk_component(main) insert end \
1844	-title "Camera Settings" \
1845	-icon [Rappture::icon camera]]
1846	$inner configure -borderwidth 4
1847
1848	label $inner.view_l -text "view" -font $font
1849	set f [frame $inner.view]
1850	foreach side { front back left right top bottom } {
1851	button $f.$side -image [Rappture::icon view$side] \
1852	-command [itcl::code $this SetOrientation $side]
1853	Rappture::Tooltip::for $f.$side "Change the view to $side"
1854	pack $f.$side -side left
1855	}
1856	blt::table $inner \
1857	0,0 $inner.view_l -anchor e -pady 2 \
1858	0,1 $inner.view -anchor w -pady 2
1859	blt::table configure $inner r0 -resize none
1860
1861	set row 1
1862	set labels { qx qy qz qw xpan ypan zoom }
1863	foreach tag $labels {
1864	label $inner.${tag}label -text $tag -font $font
1865	entry $inner.${tag} -font $font -bg white \
1866	-textvariable [itcl::scope _view(-$tag)]
1867	bind $inner.${tag} <Return> \
1868	[itcl::code $this camera set -${tag}]
1869	bind $inner.${tag} <KP_Enter> \
1870	[itcl::code $this camera set -${tag}]
1871	blt::table $inner \
1872	$row,0 $inner.${tag}label -anchor e -pady 2 \
1873	$row,1 $inner.${tag} -anchor w -pady 2
1874	blt::table configure $inner r$row -resize none
1875	incr row
1876	}
1877	checkbutton $inner.ortho \
1878	-text "Orthographic Projection" \
1879	-variable [itcl::scope _view(-ortho)] \
1880	-command [itcl::code $this camera set -ortho] \
1881	-font $font
1882	blt::table $inner \
1883	$row,0 $inner.ortho -cspan 2 -anchor w -pady 2
1884	blt::table configure $inner r$row -resize none
1885	incr row
1886
1887	blt::table configure $inner c0 c1 -resize none
1888	blt::table configure $inner c2 -resize expand
1889	blt::table configure $inner r$row -resize expand
1890	}
1891
1892	itcl::body Rappture::VtkVolumeViewer::BuildCutplanesTab {} {
1893	set font [option get $itk_component(hull) font Font]
1894
1895	set inner [$itk_component(main) insert end \
1896	-title "Cutplane Settings" \
1897	-icon [Rappture::icon cutbutton]]
1898
1899	$inner configure -borderwidth 4
1900
1901	checkbutton $inner.visible \
1902	-text "Show Cutplanes" \
1903	-variable [itcl::scope _settings(-cutplanesvisible)] \
1904	-command [itcl::code $this AdjustSetting -cutplanesvisible] \
1905	-font $font
1906
1907	checkbutton $inner.lighting \
1908	-text "Enable Lighting" \
1909	-variable [itcl::scope _settings(-cutplanelighting)] \
1910	-command [itcl::code $this AdjustSetting -cutplanelighting] \
1911	-font $font
1912
1913	label $inner.opacity_l -text "Opacity" -font $font
1914	::scale $inner.opacity -from 0 -to 100 -orient horizontal \
1915	-variable [itcl::scope _settings(-cutplaneopacity)] \
1916	-width 10 \
1917	-showvalue off \
1918	-command [itcl::code $this AdjustSetting -cutplaneopacity]
1919	$inner.opacity set $_settings(-cutplaneopacity)
1920
1921	# X-value slicer...
1922	itk_component add xCutButton {
1923	Rappture::PushButton $inner.xbutton \
1924	-onimage [Rappture::icon x-cutplane] \
1925	-offimage [Rappture::icon x-cutplane] \
1926	-command [itcl::code $this AdjustSetting -xcutplanevisible] \
1927	-variable [itcl::scope _settings(-xcutplanevisible)]
1928	}
1929	Rappture::Tooltip::for $itk_component(xCutButton) \
1930	"Toggle the X-axis cutplane on/off"
1931	$itk_component(xCutButton) select
1932
1933	itk_component add xCutScale {
1934	::scale $inner.xval -from 100 -to 0 \
1935	-width 10 -orient vertical -showvalue 1 \
1936	-borderwidth 1 -highlightthickness 0 \
1937	-command [itcl::code $this EventuallySetCutplane x] \
1938	-variable [itcl::scope _settings(-xcutplaneposition)]
1939	} {
1940	usual
1941	ignore -borderwidth -highlightthickness
1942	}
1943	# Set the default cutplane value before disabling the scale.
1944	$itk_component(xCutScale) set 50
1945	$itk_component(xCutScale) configure -state disabled
1946	Rappture::Tooltip::for $itk_component(xCutScale) \
1947	"@[itcl::code $this Slice tooltip x]"
1948
1949	# Y-value slicer...
1950	itk_component add yCutButton {
1951	Rappture::PushButton $inner.ybutton \
1952	-onimage [Rappture::icon y-cutplane] \
1953	-offimage [Rappture::icon y-cutplane] \
1954	-command [itcl::code $this AdjustSetting -ycutplanevisible] \
1955	-variable [itcl::scope _settings(-ycutplanevisible)]
1956	}
1957	Rappture::Tooltip::for $itk_component(yCutButton) \
1958	"Toggle the Y-axis cutplane on/off"
1959	$itk_component(yCutButton) select
1960
1961	itk_component add yCutScale {
1962	::scale $inner.yval -from 100 -to 0 \
1963	-width 10 -orient vertical -showvalue 1 \
1964	-borderwidth 1 -highlightthickness 0 \
1965	-command [itcl::code $this EventuallySetCutplane y] \
1966	-variable [itcl::scope _settings(-ycutplaneposition)]
1967	} {
1968	usual
1969	ignore -borderwidth -highlightthickness
1970	}
1971	Rappture::Tooltip::for $itk_component(yCutScale) \
1972	"@[itcl::code $this Slice tooltip y]"
1973	# Set the default cutplane value before disabling the scale.
1974	$itk_component(yCutScale) set 50
1975	$itk_component(yCutScale) configure -state disabled
1976
1977	# Z-value slicer...
1978	itk_component add zCutButton {
1979	Rappture::PushButton $inner.zbutton \
1980	-onimage [Rappture::icon z-cutplane] \
1981	-offimage [Rappture::icon z-cutplane] \
1982	-command [itcl::code $this AdjustSetting -zcutplanevisible] \
1983	-variable [itcl::scope _settings(-zcutplanevisible)]
1984	}
1985	Rappture::Tooltip::for $itk_component(zCutButton) \
1986	"Toggle the Z-axis cutplane on/off"
1987	$itk_component(zCutButton) select
1988
1989	itk_component add zCutScale {
1990	::scale $inner.zval -from 100 -to 0 \
1991	-width 10 -orient vertical -showvalue 1 \
1992	-borderwidth 1 -highlightthickness 0 \
1993	-command [itcl::code $this EventuallySetCutplane z] \
1994	-variable [itcl::scope _settings(-zcutplaneposition)]
1995	} {
1996	usual
1997	ignore -borderwidth -highlightthickness
1998	}
1999	$itk_component(zCutScale) set 50
2000	$itk_component(zCutScale) configure -state disabled
2001	Rappture::Tooltip::for $itk_component(zCutScale) \
2002	"@[itcl::code $this Slice tooltip z]"
2003
2004	blt::table $inner \
2005	0,0 $inner.visible -anchor w -pady 2 -cspan 4 \
2006	1,0 $inner.lighting -anchor w -pady 2 -cspan 4 \
2007	2,0 $inner.opacity_l -anchor w -pady 2 -cspan 3 \
2008	3,0 $inner.opacity -fill x -pady 2 -cspan 3 \
2009	4,0 $itk_component(xCutButton) -anchor e -padx 2 -pady 2 \
2010	5,0 $itk_component(xCutScale) -fill y \
2011	4,1 $itk_component(yCutButton) -anchor e -padx 2 -pady 2 \
2012	5,1 $itk_component(yCutScale) -fill y \
2013	4,2 $itk_component(zCutButton) -anchor e -padx 2 -pady 2 \
2014	5,2 $itk_component(zCutScale) -fill y
2015
2016	blt::table configure $inner r* c* -resize none
2017	blt::table configure $inner r5 c3 -resize expand
2018	}
2019
2020	#
2021	# camera --
2022	#
2023	itcl::body Rappture::VtkVolumeViewer::camera {option args} {
2024	switch -- $option {
2025	"show" {
2026	puts [array get _view]
2027	}
2028	"set" {
2029	set what [lindex $args 0]
2030	set x $_view($what)
2031	set code [catch { string is double $x } result]
2032	if { $code != 0 \|\| !$result } {
2033	return
2034	}
2035	switch -- $what {
2036	"-ortho" {
2037	if {$_view($what)} {
2038	SendCmd "camera mode ortho"
2039	} else {
2040	SendCmd "camera mode persp"
2041	}
2042	}
2043	"-xpan" - "-ypan" {
2044	PanCamera
2045	}
2046	"-qx" - "-qy" - "-qz" - "-qw" {
2047	set q [ViewToQuaternion]
2048	$_arcball quaternion $q
2049	EventuallyRotate $q
2050	}
2051	"-zoom" {
2052	SendCmd "camera zoom $_view($what)"
2053	}
2054	}
2055	}
2056	}
2057	}
2058
2059	itcl::body Rappture::VtkVolumeViewer::GetVtkData { args } {
2060	set bytes ""
2061	foreach dataobj [get] {
2062	foreach comp [$dataobj components] {
2063	set tag $dataobj-$comp
2064	set contents [$dataobj vtkdata $comp]
2065	append bytes "$contents\n"
2066	}
2067	}
2068	return [list .vtk $bytes]
2069	}
2070
2071	itcl::body Rappture::VtkVolumeViewer::GetImage { args } {
2072	if { [image width $_image(download)] > 0 &&
2073	[image height $_image(download)] > 0 } {
2074	set bytes [$_image(download) data -format "jpeg -quality 100"]
2075	set bytes [Rappture::encoding::decode -as b64 $bytes]
2076	return [list .jpg $bytes]
2077	}
2078	return ""
2079	}
2080
2081	itcl::body Rappture::VtkVolumeViewer::BuildDownloadPopup { popup command } {
2082	Rappture::Balloon $popup \
2083	-title "[Rappture::filexfer::label downloadWord] as..."
2084	set inner [$popup component inner]
2085	label $inner.summary -text "" -anchor w
2086	radiobutton $inner.vtk_button -text "VTK data file" \
2087	-variable [itcl::scope _downloadPopup(format)] \
2088	-font "Helvetica 9 " \
2089	-value vtk
2090	Rappture::Tooltip::for $inner.vtk_button "Save as VTK data file."
2091	radiobutton $inner.image_button -text "Image File" \
2092	-variable [itcl::scope _downloadPopup(format)] \
2093	-value image
2094	Rappture::Tooltip::for $inner.image_button \
2095	"Save as digital image."
2096
2097	button $inner.ok -text "Save" \
2098	-highlightthickness 0 -pady 2 -padx 3 \
2099	-command $command \
2100	-compound left \
2101	-image [Rappture::icon download]
2102
2103	button $inner.cancel -text "Cancel" \
2104	-highlightthickness 0 -pady 2 -padx 3 \
2105	-command [list $popup deactivate] \
2106	-compound left \
2107	-image [Rappture::icon cancel]
2108
2109	blt::table $inner \
2110	0,0 $inner.summary -cspan 2 \
2111	1,0 $inner.vtk_button -anchor w -cspan 2 -padx { 4 0 } \
2112	2,0 $inner.image_button -anchor w -cspan 2 -padx { 4 0 } \
2113	4,1 $inner.cancel -width .9i -fill y \
2114	4,0 $inner.ok -padx 2 -width .9i -fill y
2115	blt::table configure $inner r3 -height 4
2116	blt::table configure $inner r4 -pady 4
2117	raise $inner.image_button
2118	$inner.vtk_button invoke
2119	return $inner
2120	}
2121
2122	itcl::body Rappture::VtkVolumeViewer::SetObjectStyle { dataobj cname } {
2123	# Parse style string.
2124	set tag $dataobj-$cname
2125	array set style {
2126	-color BCGYR
2127	-lighting 1
2128	-opacity 0.5
2129	-outline 0
2130	-visible 1
2131	}
2132	array set style [$dataobj style $cname]
2133	set _settings(-volumelighting) $style(-lighting)
2134	set _settings(-volumeopacity) [expr $style(-opacity) * 100.0]
2135	set _settings(-volumeoutline) $style(-outline)
2136	set _settings(-volumevisible) $style(-visible)
2137
2138	$itk_component(colormap) value $style(-color)
2139
2140	SendCmd "outline add $tag"
2141	SendCmd "outline color [Color2RGB $itk_option(-plotforeground)] $tag"
2142	SendCmd "outline visible $style(-outline) $tag"
2143
2144	SendCmd "$_cutplaneCmd add $tag"
2145	SendCmd "$_cutplaneCmd color [Color2RGB $itk_option(-plotforeground)] $tag"
2146	SendCmd "$_cutplaneCmd visible 0 $tag"
2147
2148	SendCmd "volume add $tag"
2149	SendCmd "volume lighting $style(-lighting) $tag"
2150	SendCmd "volume opacity $style(-opacity) $tag"
2151	SendCmd "volume visible $style(-visible) $tag"
2152	SetColormap $dataobj $cname
2153	}
2154
2155	itcl::body Rappture::VtkVolumeViewer::IsValidObject { dataobj } {
2156	if {[catch {$dataobj isa Rappture::Field} valid] != 0 \|\| !$valid} {
2157	return 0
2158	}
2159	return 1
2160	}
2161
2162	# ----------------------------------------------------------------------
2163	# USAGE: ReceiveLegend <colormap> <title> <vmin> <vmax> <size>
2164	#
2165	# Invoked automatically whenever the "legend" command comes in from
2166	# the rendering server. Indicates that binary image data with the
2167	# specified <size> will follow.
2168	# ----------------------------------------------------------------------
2169	itcl::body Rappture::VtkVolumeViewer::ReceiveLegend { colormap title vmin vmax size } {
2170	if { [isconnected] } {
2171	set bytes [ReceiveBytes $size]
2172	if { ![info exists _image(legend)] } {
2173	set _image(legend) [image create photo]
2174	}
2175	$_image(legend) configure -data $bytes
2176	#puts stderr "read $size bytes for [image width $_image(legend)]x[image height $_image(legend)] legend>"
2177	if { [catch {DrawLegend} errs] != 0 } {
2178	puts stderr errs=$errs
2179	}
2180	}
2181	}
2182
2183	#
2184	# DrawLegend --
2185	#
2186	itcl::body Rappture::VtkVolumeViewer::DrawLegend {} {
2187	set fname $_curFldName
2188	set c $itk_component(view)
2189	set w [winfo width $c]
2190	set h [winfo height $c]
2191	set font "Arial 8"
2192	set lineht [font metrics $font -linespace]
2193
2194	if { !$_settings(-legendvisible) } {
2195	$c delete legend
2196	return
2197	}
2198
2199	if { [info exists _fields($fname)] } {
2200	foreach { title units } $_fields($fname) break
2201	if { $units != "" } {
2202	set title [format "%s (%s)" $title $units]
2203	}
2204	} else {
2205	set title $fname
2206	}
2207
2208	set x [expr $w - 2]
2209	if { [$c find withtag "legend"] == "" } {
2210	set y 2
2211	$c create text $x $y \
2212	-anchor ne \
2213	-fill $itk_option(-plotforeground) -tags "title legend" \
2214	-font $font
2215	incr y $lineht
2216	$c create text $x $y \
2217	-anchor ne \
2218	-fill $itk_option(-plotforeground) -tags "vmax legend" \
2219	-font $font
2220	incr y $lineht
2221	$c create image $x $y \
2222	-anchor ne \
2223	-image $_image(legend) -tags "colormap legend"
2224	$c create text $x [expr {$h-2}] \
2225	-anchor se \
2226	-fill $itk_option(-plotforeground) -tags "vmin legend" \
2227	-font $font
2228	#$c bind colormap <Enter> [itcl::code $this EnterLegend %x %y]
2229	$c bind colormap <Leave> [itcl::code $this LeaveLegend]
2230	$c bind colormap <Motion> [itcl::code $this MotionLegend %x %y]
2231	}
2232	$c bind title <ButtonPress> [itcl::code $this Combo post]
2233	$c bind title <Enter> [itcl::code $this Combo activate]
2234	$c bind title <Leave> [itcl::code $this Combo deactivate]
2235	# Reset the item coordinates according the current size of the plot.
2236	$c itemconfigure title -text $title
2237	if { [info exists _limits($_curFldName)] } {
2238	foreach { vmin vmax } $_limits($_curFldName) break
2239	$c itemconfigure vmin -text [format %g $vmin]
2240	$c itemconfigure vmax -text [format %g $vmax]
2241	}
2242	set y 2
2243	$c coords title $x $y
2244	incr y $lineht
2245	$c coords vmax $x $y
2246	incr y $lineht
2247	$c coords colormap $x $y
2248	$c coords vmin $x [expr {$h - 2}]
2249	}
2250
2251	#
2252	# EnterLegend --
2253	#
2254	itcl::body Rappture::VtkVolumeViewer::EnterLegend { x y } {
2255	SetLegendTip $x $y
2256	}
2257
2258	#
2259	# MotionLegend --
2260	#
2261	itcl::body Rappture::VtkVolumeViewer::MotionLegend { x y } {
2262	Rappture::Tooltip::tooltip cancel
2263	set c $itk_component(view)
2264	SetLegendTip $x $y
2265	}
2266
2267	#
2268	# LeaveLegend --
2269	#
2270	itcl::body Rappture::VtkVolumeViewer::LeaveLegend { } {
2271	Rappture::Tooltip::tooltip cancel
2272	.rappturetooltip configure -icon ""
2273	}
2274
2275	#
2276	# SetLegendTip --
2277	#
2278	itcl::body Rappture::VtkVolumeViewer::SetLegendTip { x y } {
2279	set c $itk_component(view)
2280	set w [winfo width $c]
2281	set h [winfo height $c]
2282	set font "Arial 8"
2283	set lineht [font metrics $font -linespace]
2284
2285	set imgHeight [image height $_image(legend)]
2286	set coords [$c coords colormap]
2287	set imgX [expr $w - [image width $_image(legend)] - 2]
2288	set imgY [expr $y - 2 * ($lineht + 2)]
2289
2290	if { [info exists _fields($_title)] } {
2291	foreach { title units } $_fields($_title) break
2292	if { $units != "" } {
2293	set title [format "%s (%s)" $title $units]
2294	}
2295	} else {
2296	set title $_title
2297	}
2298	# Make a swatch of the selected color
2299	if { [catch { $_image(legend) get 10 $imgY } pixel] != 0 } {
2300	#puts stderr "out of range: $imgY"
2301	return
2302	}
2303	if { ![info exists _image(swatch)] } {
2304	set _image(swatch) [image create photo -width 24 -height 24]
2305	}
2306	set color [eval format "\#%02x%02x%02x" $pixel]
2307	$_image(swatch) put black -to 0 0 23 23
2308	$_image(swatch) put $color -to 1 1 22 22
2309	.rappturetooltip configure -icon $_image(swatch)
2310
2311	# Compute the value of the point
2312	if { [info exists _limits($_curFldName)] } {
2313	foreach { vmin vmax } $_limits($_curFldName) break
2314	set t [expr 1.0 - (double($imgY) / double($imgHeight-1))]
2315	set value [expr $t * ($vmax - $vmin) + $vmin]
2316	} else {
2317	set value 0.0
2318	}
2319	set tipx [expr $x + 15]
2320	set tipy [expr $y - 5]
2321	Rappture::Tooltip::text $c "$title $value"
2322	Rappture::Tooltip::tooltip show $c +$tipx,+$tipy
2323	}
2324
2325	# ----------------------------------------------------------------------
2326	# USAGE: Slice move x\|y\|z <newval>
2327	#
2328	# Called automatically when the user drags the slider to move the
2329	# cut plane that slices 3D data. Gets the current value from the
2330	# slider and moves the cut plane to the appropriate point in the
2331	# data set.
2332	# ----------------------------------------------------------------------
2333	itcl::body Rappture::VtkVolumeViewer::Slice {option args} {
2334	switch -- $option {
2335	"move" {
2336	set axis [lindex $args 0]
2337	set newval [lindex $args 1]
2338	if {[llength $args] != 2} {
2339	error "wrong # args: should be \"Slice move x\|y\|z newval\""
2340	}
2341	set newpos [expr {0.01*$newval}]
2342	SendCmd "$_cutplaneCmd slice $axis $newpos"
2343	}
2344	"tooltip" {
2345	set axis [lindex $args 0]
2346	set val [$itk_component(${axis}CutScale) get]
2347	return "Move the [string toupper $axis] cut plane.\nCurrently: $axis = $val%"
2348	}
2349	default {
2350	error "bad option \"$option\": should be axis, move, or tooltip"
2351	}
2352	}
2353	}
2354
2355	# ----------------------------------------------------------------------
2356	# USAGE: _dropdown post
2357	# USAGE: _dropdown unpost
2358	# USAGE: _dropdown select
2359	#
2360	# Used internally to handle the dropdown list for this combobox. The
2361	# post/unpost options are invoked when the list is posted or unposted
2362	# to manage the relief of the controlling button. The select option
2363	# is invoked whenever there is a selection from the list, to assign
2364	# the value back to the gauge.
2365	# ----------------------------------------------------------------------
2366	itcl::body Rappture::VtkVolumeViewer::Combo {option} {
2367	set c $itk_component(view)
2368	switch -- $option {
2369	post {
2370	foreach { x1 y1 x2 y2 } [$c bbox title] break
2371	set x1 [expr [winfo width $itk_component(view)] - [winfo reqwidth $itk_component(fieldmenu)]]
2372	set x [expr $x1 + [winfo rootx $itk_component(view)]]
2373	set y [expr $y2 + [winfo rooty $itk_component(view)]]
2374	tk_popup $itk_component(fieldmenu) $x $y
2375	}
2376	activate {
2377	$c itemconfigure title -fill red
2378	}
2379	deactivate {
2380	$c itemconfigure title -fill $itk_option(-plotforeground)
2381	}
2382	invoke {
2383	$itk_component(field) value $_curFldLabel
2384	AdjustSetting -field
2385	}
2386	default {
2387	error "bad option \"$option\": should be post, unpost, select"
2388	}
2389	}
2390	}
2391
2392	itcl::body Rappture::VtkVolumeViewer::SetOrientation { side } {
2393	array set positions {
2394	front "1 0 0 0"
2395	back "0 0 1 0"
2396	left "0.707107 0 -0.707107 0"
2397	right "0.707107 0 0.707107 0"
2398	top "0.707107 -0.707107 0 0"
2399	bottom "0.707107 0.707107 0 0"
2400	}
2401	foreach name { -qw -qx -qy -qz } value $positions($side) {
2402	set _view($name) $value
2403	}
2404	set q [ViewToQuaternion]
2405	$_arcball quaternion $q
2406	SendCmd "camera orient $q"
2407	SendCmd "camera reset"
2408	set _view(-xpan) 0
2409	set _view(-ypan) 0
2410	set _view(-zoom) 1.0
2411	}
2412
2413	#
2414	# GetDatasetsWithComponent --
2415	#
2416	# Returns a list of all the datasets (known by the combination of
2417	# their data object and component name) that match the given
2418	# component name. For example, this is used where we want to change
2419	# the settings of volumes that have the current component.
2420	#
2421	itcl::body Rappture::VtkVolumeViewer::GetDatasetsWithComponent { cname } {
2422	if { ![info exists _volcomponents($cname)] } {
2423	return ""
2424	}
2425	return $_volcomponents($cname)
2426	}

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