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source: branches/1.4/gui/scripts/nanovisviewer.tcl @ 5293

Last change on this file since 5293 was 5293, checked in by ldelgass, 9 years ago
merge r5292 from trunk
File size: 78.5 KB

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1	# -- mode: tcl; indent-tabs-mode: nil --
2	# ----------------------------------------------------------------------
3	# COMPONENT: nanovisviewer - 3D volume rendering
4	#
5	# This widget performs volume rendering on 3D scalar/vector datasets.
6	# It connects to the Nanovis server running on a rendering farm,
7	# transmits data, and displays the results.
8	# ======================================================================
9	# AUTHOR: Michael McLennan, Purdue University
10	# Copyright (c) 2004-2012 HUBzero Foundation, LLC
11	#
12	# See the file "license.terms" for information on usage and
13	# redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES.
14	# ======================================================================
15	package require Itk
16	package require BLT
17	package require Img
18
19	#
20	# FIXME:
21	# Need to Add DX readers this client to examine the data before
22	# it's sent to the server. This will eliminate 90% of the insanity in
23	# computing the limits of all the volumes. I can rip out all the
24	# "receive data" "send transfer function" event crap.
25	#
26	# This means we can compute the transfer function (relative values) and
27	# draw the legend min/max values without waiting for the information to
28	# come from the server. This will also prevent the flashing that occurs
29	# when a new volume is drawn (using the default transfer function) and
30	# then when the correct transfer function has been sent and linked to
31	# the volume.
32	#
33	option add *NanovisViewer.width 4i widgetDefault
34	option add NanovisViewercursor crosshair widgetDefault
35	option add *NanovisViewer.height 4i widgetDefault
36	option add *NanovisViewer.foreground black widgetDefault
37	option add *NanovisViewer.controlBackground gray widgetDefault
38	option add *NanovisViewer.controlDarkBackground #999999 widgetDefault
39	option add *NanovisViewer.plotBackground black widgetDefault
40	option add *NanovisViewer.plotForeground white widgetDefault
41	option add *NanovisViewer.plotOutline gray widgetDefault
42	option add *NanovisViewer.font \
43	--helvetica-medium-r-normal--12-* widgetDefault
44
45	# must use this name -- plugs into Rappture::resources::load
46	proc NanovisViewer_init_resources {} {
47	Rappture::resources::register \
48	nanovis_server Rappture::NanovisViewer::SetServerList
49	}
50
51	itcl::class Rappture::NanovisViewer {
52	inherit Rappture::VisViewer
53
54	itk_option define -plotforeground plotForeground Foreground ""
55	itk_option define -plotbackground plotBackground Background ""
56	itk_option define -plotoutline plotOutline PlotOutline ""
57
58	constructor { hostlist args } {
59	Rappture::VisViewer::constructor $hostlist
60	} {
61	# defined below
62	}
63	destructor {
64	# defined below
65	}
66	public proc SetServerList { namelist } {
67	Rappture::VisViewer::SetServerList "nanovis" $namelist
68	}
69	public method add {dataobj {settings ""}}
70	public method camera {option args}
71	public method delete {args}
72	public method disconnect {}
73	public method download {option args}
74	public method get {args}
75	public method isconnected {}
76	public method parameters {title args} {
77	# do nothing
78	}
79	public method scale {args}
80	public method updateTransferFunctions {}
81
82	# The following methods are only used by this class.
83	private method AddNewMarker { x y }
84	private method AdjustSetting {what {value ""}}
85	private method BuildCameraTab {}
86	private method BuildCutplanesTab {}
87	private method BuildViewTab {}
88	private method BuildVolumeComponents {}
89	private method BuildVolumeTab {}
90	private method ComputeAlphamap { cname }
91	private method ComputeTransferFunction { cname }
92	private method Connect {}
93	private method CurrentDatasets {{what -all}}
94	private method Disconnect {}
95	private method DoResize {}
96	private method DrawLegend { cname }
97	private method EventuallyRedrawLegend { }
98	private method EventuallyResize { w h }
99	private method FixLegend {}
100	private method GetColormap { cname color }
101	private method GetDatasetsWithComponent { cname }
102	private method HideAllMarkers {}
103	private method InitComponentSettings { cname }
104	private method InitSettings { args }
105	private method NameTransferFunction { dataobj comp }
106	private method Pan {option x y}
107	private method PanCamera {}
108	private method ParseLevelsOption { cname levels }
109	private method ParseMarkersOption { cname markers }
110	private method QuaternionToView { q } {
111	foreach { _view(-qw) _view(-qx) _view(-qy) _view(-qz) } $q break
112	}
113	private method Rebuild {}
114	private method ReceiveData { args }
115	private method ReceiveImage { args }
116	private method ReceiveLegend { tf vmin vmax size }
117	private method RemoveMarker { x y }
118	private method ResetColormap { cname color }
119	private method Rotate {option x y}
120	private method SendTransferFunctions {}
121	private method SetObjectStyle { dataobj cname }
122	private method SetOrientation { side }
123	private method Slice {option args}
124	private method SlicerTip {axis}
125	private method SwitchComponent { cname }
126	private method ViewToQuaternion {} {
127	return [list $_view(-qw) $_view(-qx) $_view(-qy) $_view(-qz)]
128	}
129	private method Zoom {option}
130
131	private variable _arcball ""
132	private variable _dlist "" ;# list of data objects
133	private variable _obj2ovride ;# maps dataobj => style override
134	private variable _serverDatasets ;# contains all the dataobj-component
135	;# to volumes in the server
136	private variable _recvdDatasets ;# list of data objs to send to server
137
138	private variable _reset 1 ;# Connection to server has been reset.
139	private variable _click ;# Info used for rotate operations.
140	private variable _limits ;# Autoscale min/max for all axes
141	private variable _view ;# View params for 3D view
142	private variable _parsedFunction
143	private variable _transferFunctionEditors
144	private variable _settings
145	private variable _widget
146
147	private variable _first "" ;# This is the topmost volume.
148	private variable _current "" ;# Currently selected component
149	private variable _volcomponents ;# Maps component name to list of
150	;# dataobj-component tags
151	private variable _componentsList ;# List of components found
152	private variable _cname2transferFunction
153	private variable _cname2defaultcolormap
154	private variable _width 0
155	private variable _height 0
156	private variable _resizePending 0
157	private variable _resizeLegendPending 0
158
159	common _downloadPopup ;# download options from popup
160	private common _hardcopy
161	}
162
163	itk::usual NanovisViewer {
164	keep -background -foreground -cursor -font
165	keep -plotbackground -plotforeground
166	}
167
168	# ----------------------------------------------------------------------
169	# CONSTRUCTOR
170	# ----------------------------------------------------------------------
171	itcl::body Rappture::NanovisViewer::constructor {hostlist args} {
172	set _serverType "nanovis"
173
174	# Draw legend event
175	$_dispatcher register !legend
176	$_dispatcher dispatch $this !legend "[itcl::code $this FixLegend]; list"
177
178	# Send transfer functions event
179	$_dispatcher register !send_transfunc
180	$_dispatcher dispatch $this !send_transfunc \
181	"[itcl::code $this SendTransferFunctions]; list"
182
183	# Rebuild event
184	$_dispatcher register !rebuild
185	$_dispatcher dispatch $this !rebuild "[itcl::code $this Rebuild]; list"
186
187	# Resize event
188	$_dispatcher register !resize
189	$_dispatcher dispatch $this !resize "[itcl::code $this DoResize]; list"
190
191	#
192	# Populate parser with commands handle incoming requests
193	#
194	$_parser alias image [itcl::code $this ReceiveImage]
195	$_parser alias legend [itcl::code $this ReceiveLegend]
196	$_parser alias data [itcl::code $this ReceiveData]
197
198	# Initialize the view to some default parameters.
199	array set _view {
200	-qw 0.853553
201	-qx -0.353553
202	-qy 0.353553
203	-qz 0.146447
204	-xpan 0
205	-ypan 0
206	-zoom 1.0
207	}
208	set _arcball [blt::arcball create 100 100]
209	$_arcball quaternion [ViewToQuaternion]
210
211	set _limits(v) [list 0.0 1.0]
212	set _reset 1
213
214	array set _settings {
215	-axesvisible 1
216	-background black
217	-colormap "default"
218	-cutplanesvisible 0
219	-gridvisible 0
220	-isosurfaceshading 0
221	-legendvisible 1
222	-light 40
223	-light2side 1
224	-outlinevisible 0
225	-qw 0.853553
226	-qx -0.353553
227	-qy 0.353553
228	-qz 0.146447
229	-thickness 350
230	-volume 1
231	-volumeopacity 0.5
232	-volumevisible 1
233	-xcutplaneposition 50
234	-xcutplanevisible 1
235	-xpan 0
236	-ycutplaneposition 50
237	-ycutplanevisible 1
238	-ypan 0
239	-zcutplaneposition 50
240	-zcutplanevisible 1
241	-zoom 1.0
242	}
243	array set _widget {
244	-volumeopacity 50
245	}
246	itk_component add 3dview {
247	label $itk_component(plotarea).view -image $_image(plot) \
248	-highlightthickness 0 -borderwidth 0
249	} {
250	usual
251	ignore -highlightthickness -borderwidth -background
252	}
253	bind $itk_component(3dview) <Control-F1> [itcl::code $this ToggleConsole]
254
255	set f [$itk_component(main) component controls]
256	itk_component add reset {
257	button $f.reset -borderwidth 1 -padx 1 -pady 1 \
258	-highlightthickness 0 \
259	-image [Rappture::icon reset-view] \
260	-command [itcl::code $this Zoom reset]
261	} {
262	usual
263	ignore -highlightthickness
264	}
265	pack $itk_component(reset) -side top -padx 2 -pady 2
266	Rappture::Tooltip::for $itk_component(reset) \
267	"Reset the view to the default zoom level"
268
269	itk_component add zoomin {
270	button $f.zin -borderwidth 1 -padx 1 -pady 1 \
271	-highlightthickness 0 \
272	-image [Rappture::icon zoom-in] \
273	-command [itcl::code $this Zoom in]
274	} {
275	usual
276	ignore -highlightthickness
277	}
278	pack $itk_component(zoomin) -side top -padx 2 -pady 2
279	Rappture::Tooltip::for $itk_component(zoomin) "Zoom in"
280
281	itk_component add zoomout {
282	button $f.zout -borderwidth 1 -padx 1 -pady 1 \
283	-highlightthickness 0 \
284	-image [Rappture::icon zoom-out] \
285	-command [itcl::code $this Zoom out]
286	} {
287	usual
288	ignore -highlightthickness
289	}
290	pack $itk_component(zoomout) -side top -padx 2 -pady 2
291	Rappture::Tooltip::for $itk_component(zoomout) "Zoom out"
292
293	itk_component add volume {
294	Rappture::PushButton $f.volume \
295	-onimage [Rappture::icon volume-on] \
296	-offimage [Rappture::icon volume-off] \
297	-command [itcl::code $this AdjustSetting -volume] \
298	-variable [itcl::scope _settings(-volume)]
299	}
300	$itk_component(volume) select
301	Rappture::Tooltip::for $itk_component(volume) \
302	"Toggle the volume cloud on/off"
303	pack $itk_component(volume) -padx 2 -pady 2
304
305	itk_component add cutplane {
306	Rappture::PushButton $f.cutplane \
307	-onimage [Rappture::icon cutbutton] \
308	-offimage [Rappture::icon cutbutton] \
309	-variable [itcl::scope _settings(-cutplanesvisible)] \
310	-command [itcl::code $this AdjustSetting -cutplanesvisible]
311	}
312	Rappture::Tooltip::for $itk_component(cutplane) \
313	"Show/Hide cutplanes"
314	pack $itk_component(cutplane) -padx 2 -pady 2
315
316	if { [catch {
317	BuildViewTab
318	BuildVolumeTab
319	BuildCutplanesTab
320	BuildCameraTab
321	} errs] != 0 } {
322	global errorInfo
323	puts stderr "errs=$errs errorInfo=$errorInfo"
324	}
325
326	# Legend
327	set _image(legend) [image create photo]
328	itk_component add legend {
329	canvas $itk_component(plotarea).legend -height 50 -highlightthickness 0
330	} {
331	usual
332	ignore -highlightthickness
333	rename -background -plotbackground plotBackground Background
334	}
335	bind $itk_component(legend) <Configure> \
336	[itcl::code $this EventuallyRedrawLegend]
337	bind $itk_component(legend) <KeyPress-Delete> \
338	[itcl::code $this RemoveMarker %x %y]
339	bind $itk_component(legend) <Enter> \
340	[list focus $itk_component(legend)]
341
342	# Hack around the Tk panewindow. The problem is that the requested
343	# size of the 3d view isn't set until an image is retrieved from
344	# the server. So the panewindow uses the tiny size.
345	set w 10000
346	pack forget $itk_component(3dview)
347	blt::table $itk_component(plotarea) \
348	0,0 $itk_component(3dview) -fill both -reqwidth $w \
349	1,0 $itk_component(legend) -fill x
350	blt::table configure $itk_component(plotarea) r1 -resize none
351
352	# Bindings for rotation via mouse
353	bind $itk_component(3dview) <ButtonPress-1> \
354	[itcl::code $this Rotate click %x %y]
355	bind $itk_component(3dview) <B1-Motion> \
356	[itcl::code $this Rotate drag %x %y]
357	bind $itk_component(3dview) <ButtonRelease-1> \
358	[itcl::code $this Rotate release %x %y]
359	bind $itk_component(3dview) <Configure> \
360	[itcl::code $this EventuallyResize %w %h]
361
362	# Bindings for panning via mouse
363	bind $itk_component(3dview) <ButtonPress-2> \
364	[itcl::code $this Pan click %x %y]
365	bind $itk_component(3dview) <B2-Motion> \
366	[itcl::code $this Pan drag %x %y]
367	bind $itk_component(3dview) <ButtonRelease-2> \
368	[itcl::code $this Pan release %x %y]
369
370	# Bindings for panning via keyboard
371	bind $itk_component(3dview) <KeyPress-Left> \
372	[itcl::code $this Pan set -10 0]
373	bind $itk_component(3dview) <KeyPress-Right> \
374	[itcl::code $this Pan set 10 0]
375	bind $itk_component(3dview) <KeyPress-Up> \
376	[itcl::code $this Pan set 0 -10]
377	bind $itk_component(3dview) <KeyPress-Down> \
378	[itcl::code $this Pan set 0 10]
379	bind $itk_component(3dview) <Shift-KeyPress-Left> \
380	[itcl::code $this Pan set -2 0]
381	bind $itk_component(3dview) <Shift-KeyPress-Right> \
382	[itcl::code $this Pan set 2 0]
383	bind $itk_component(3dview) <Shift-KeyPress-Up> \
384	[itcl::code $this Pan set 0 -2]
385	bind $itk_component(3dview) <Shift-KeyPress-Down> \
386	[itcl::code $this Pan set 0 2]
387
388	# Bindings for zoom via keyboard
389	bind $itk_component(3dview) <KeyPress-Prior> \
390	[itcl::code $this Zoom out]
391	bind $itk_component(3dview) <KeyPress-Next> \
392	[itcl::code $this Zoom in]
393
394	bind $itk_component(3dview) <Enter> "focus $itk_component(3dview)"
395
396	if {[string equal "x11" [tk windowingsystem]]} {
397	# Bindings for zoom via mouse
398	bind $itk_component(3dview) <4> [itcl::code $this Zoom out]
399	bind $itk_component(3dview) <5> [itcl::code $this Zoom in]
400	}
401
402	set _image(download) [image create photo]
403
404	eval itk_initialize $args
405
406	EnableWaitDialog 900
407	Connect
408	}
409
410	# ----------------------------------------------------------------------
411	# DESTRUCTOR
412	# ----------------------------------------------------------------------
413	itcl::body Rappture::NanovisViewer::destructor {} {
414	$_dispatcher cancel !rebuild
415	$_dispatcher cancel !send_transfunc
416	$_dispatcher cancel !resize
417	image delete $_image(plot)
418	image delete $_image(legend)
419	image delete $_image(download)
420	foreach cname [array names _transferFunctionEditors] {
421	itcl::delete object $_transferFunctionEditors($cname)
422	}
423	catch { blt::arcball destroy $_arcball }
424	array unset _settings
425	}
426
427	# ----------------------------------------------------------------------
428	# USAGE: add <dataobj> ?<settings>?
429	#
430	# Clients use this to add a data object to the plot. The optional
431	# <settings> are used to configure the plot. Allowed settings are
432	# -color, -brightness, -width, -linestyle, and -raise.
433	# ----------------------------------------------------------------------
434	itcl::body Rappture::NanovisViewer::add {dataobj {settings ""}} {
435	if { ![$dataobj isvalid] } {
436	return; # Object doesn't contain valid data.
437	}
438	array set params {
439	-color auto
440	-width 1
441	-linestyle solid
442	-brightness 0
443	-raise 0
444	-description ""
445	-param ""
446	}
447	array set params $settings
448
449	if {$params(-color) == "auto" \|\| $params(-color) == "autoreset"} {
450	# can't handle -autocolors yet
451	set params(-color) black
452	}
453	set pos [lsearch -exact $_dlist $dataobj]
454	if {$pos < 0} {
455	lappend _dlist $dataobj
456	set _obj2ovride($dataobj-color) $params(-color)
457	set _obj2ovride($dataobj-width) $params(-width)
458	set _obj2ovride($dataobj-raise) $params(-raise)
459	$_dispatcher event -idle !rebuild
460	}
461	}
462
463	# ----------------------------------------------------------------------
464	# USAGE: get ?-objects?
465	# USAGE: get ?-image 3dview\|legend?
466	#
467	# Clients use this to query the list of objects being plotted, in
468	# order from bottom to top of this result. The optional "-image"
469	# flag can also request the internal images being shown.
470	# ----------------------------------------------------------------------
471	itcl::body Rappture::NanovisViewer::get {args} {
472	if {[llength $args] == 0} {
473	set args "-objects"
474	}
475
476	set op [lindex $args 0]
477	switch -- $op {
478	-objects {
479	# put the dataobj list in order according to -raise options
480	set dlist $_dlist
481	foreach dataobj $dlist {
482	if {[info exists _obj2ovride($dataobj-raise)] &&
483	$_obj2ovride($dataobj-raise)} {
484	set i [lsearch -exact $dlist $dataobj]
485	if {$i >= 0} {
486	set dlist [lreplace $dlist $i $i]
487	lappend dlist $dataobj
488	}
489	}
490	}
491	return $dlist
492	}
493	-image {
494	if {[llength $args] != 2} {
495	error "wrong # args: should be \"get -image 3dview\|legend\""
496	}
497	switch -- [lindex $args end] {
498	3dview {
499	return $_image(plot)
500	}
501	legend {
502	return $_image(legend)
503	}
504	default {
505	error "bad image name \"[lindex $args end]\": should be 3dview or legend"
506	}
507	}
508	}
509	default {
510	error "bad option \"$op\": should be -objects or -image"
511	}
512	}
513	}
514
515	# ----------------------------------------------------------------------
516	# USAGE: delete ?<dataobj1> <dataobj2> ...?
517	#
518	# Clients use this to delete a dataobj from the plot. If no dataobjs
519	# are specified, then all dataobjs are deleted. No data objects are
520	# deleted. They are only removed from the display list.
521	#
522	# ----------------------------------------------------------------------
523	itcl::body Rappture::NanovisViewer::delete {args} {
524	if {[llength $args] == 0} {
525	set args $_dlist
526	}
527	# Delete all specified dataobjs
528	set changed 0
529	foreach dataobj $args {
530	set pos [lsearch -exact $_dlist $dataobj]
531	if { $pos >= 0 } {
532	set _dlist [lreplace $_dlist $pos $pos]
533	array unset _obj2ovride $dataobj-*
534	set changed 1
535	}
536	}
537	# If anything changed, then rebuild the plot
538	if {$changed} {
539	$_dispatcher event -idle !rebuild
540	}
541	}
542
543	# ----------------------------------------------------------------------
544	# USAGE: scale ?<data1> <data2> ...?
545	#
546	# Sets the default limits for the overall plot according to the
547	# limits of the data for all of the given <data> objects. This
548	# accounts for all objects--even those not showing on the screen.
549	# Because of this, the limits are appropriate for all objects as
550	# the user scans through data in the ResultSet viewer.
551	# ----------------------------------------------------------------------
552	itcl::body Rappture::NanovisViewer::scale {args} {
553	array set style {
554	-color BCGYR
555	-levels 6
556	-markers ""
557	}
558	array unset _limits
559	array unset _volcomponents
560	foreach dataobj $args {
561	if { ![$dataobj isvalid] } {
562	continue; # Object doesn't contain valid data.
563	}
564	foreach cname [$dataobj components] {
565	if { ![info exists _volcomponents($cname)] } {
566	lappend _componentsList $cname
567	array set style [lindex [$dataobj components -style $cname] 0]
568	set cmap [ColorsToColormap $style(-color)]
569	set _cname2defaultcolormap($cname) $cmap
570	set _settings($cname-colormap) $style(-color)
571	}
572	lappend _volcomponents($cname) $dataobj-$cname
573	array unset limits
574	array set limits [$dataobj valueLimits $cname]
575	set _limits($cname) $limits(v)
576	}
577	foreach axis {x y z v} {
578	foreach { min max } [$dataobj limits $axis] break
579	if {"" != $min && "" != $max} {
580	if { ![info exists _limits($axis)] } {
581	set _limits($axis) [list $min $max]
582	continue
583	}
584	foreach {amin amax} $_limits($axis) break
585	if {$min < $amin} {
586	set amin $min
587	}
588	if {$max > $amax} {
589	set amax $max
590	}
591	set _limits($axis) [list $amin $amax]
592	}
593	}
594	}
595	BuildVolumeComponents
596	}
597
598	# ----------------------------------------------------------------------
599	# USAGE: download coming
600	# USAGE: download controls <downloadCommand>
601	# USAGE: download now
602	#
603	# Clients use this method to create a downloadable representation
604	# of the plot. Returns a list of the form {ext string}, where
605	# "ext" is the file extension (indicating the type of data) and
606	# "string" is the data itself.
607	# ----------------------------------------------------------------------
608	itcl::body Rappture::NanovisViewer::download {option args} {
609	switch $option {
610	coming {
611	if {[catch {
612	blt::winop snap $itk_component(plotarea) $_image(download)
613	}]} {
614	$_image(download) configure -width 1 -height 1
615	$_image(download) put #000000
616	}
617	}
618	controls {
619	# no controls for this download yet
620	return ""
621	}
622	now {
623	# Get the image data (as base64) and decode it back to binary.
624	# This is better than writing to temporary files. When we switch
625	# to the BLT picture image it won't be necessary to decode the
626	# image data.
627	if { [image width $_image(plot)] > 0 &&
628	[image height $_image(plot)] > 0 } {
629	set bytes [$_image(plot) data -format "jpeg -quality 100"]
630	set bytes [Rappture::encoding::decode -as b64 $bytes]
631	return [list .jpg $bytes]
632	}
633	return ""
634	}
635	default {
636	error "bad option \"$option\": should be coming, controls, now"
637	}
638	}
639	}
640
641	# ----------------------------------------------------------------------
642	# USAGE: Connect ?<host:port>,<host:port>...?
643	#
644	# Clients use this method to establish a connection to a new
645	# server, or to reestablish a connection to the previous server.
646	# Any existing connection is automatically closed.
647	# ----------------------------------------------------------------------
648	itcl::body Rappture::NanovisViewer::Connect {} {
649	set _hosts [GetServerList "nanovis"]
650	if { "" == $_hosts } {
651	return 0
652	}
653	set _reset 1
654	set result [VisViewer::Connect $_hosts]
655	if { $result } {
656	if { $_reportClientInfo } {
657	# Tell the server the viewer, hub, user and session.
658	# Do this immediately on connect before buffering any commands
659	global env
660
661	set info {}
662	set user "???"
663	if { [info exists env(USER)] } {
664	set user $env(USER)
665	}
666	set session "???"
667	if { [info exists env(SESSION)] } {
668	set session $env(SESSION)
669	}
670	lappend info "version" "$Rappture::version"
671	lappend info "build" "$Rappture::build"
672	lappend info "svnurl" "$Rappture::svnurl"
673	lappend info "installdir" "$Rappture::installdir"
674	lappend info "hub" [exec hostname]
675	lappend info "client" "nanovisviewer"
676	lappend info "user" $user
677	lappend info "session" $session
678	SendCmd "clientinfo [list $info]"
679	}
680
681	set w [winfo width $itk_component(3dview)]
682	set h [winfo height $itk_component(3dview)]
683	EventuallyResize $w $h
684	}
685	return $result
686	}
687
688	#
689	# isconnected --
690	#
691	# Indicates if we are currently connected to the visualization server.
692	#
693	itcl::body Rappture::NanovisViewer::isconnected {} {
694	return [VisViewer::IsConnected]
695	}
696
697	#
698	# disconnect --
699	#
700	itcl::body Rappture::NanovisViewer::disconnect {} {
701	Disconnect
702	}
703
704	#
705	# Disconnect --
706	#
707	# Clients use this method to disconnect from the current rendering
708	# server.
709	#
710	itcl::body Rappture::NanovisViewer::Disconnect {} {
711	VisViewer::Disconnect
712
713	# disconnected -- no more data sitting on server
714	array unset _serverDatasets
715	}
716
717	# ----------------------------------------------------------------------
718	# USAGE: SendTransferFunctions
719	# ----------------------------------------------------------------------
720	itcl::body Rappture::NanovisViewer::SendTransferFunctions {} {
721	foreach cname [array names _volcomponents] {
722	ComputeTransferFunction $cname
723	}
724	FixLegend
725	}
726
727	# ----------------------------------------------------------------------
728	# USAGE: ReceiveImage -bytes <size> -type <type> -token <token>
729	#
730	# Invoked automatically whenever the "image" command comes in from
731	# the rendering server. Indicates that binary image data with the
732	# specified <size> will follow.
733	# ----------------------------------------------------------------------
734	itcl::body Rappture::NanovisViewer::ReceiveImage { args } {
735	array set info {
736	-token "???"
737	-bytes 0
738	-type image
739	}
740	array set info $args
741	set bytes [ReceiveBytes $info(-bytes)]
742	ReceiveEcho <<line "<read $info(-bytes) bytes"
743	if { $info(-type) == "image" } {
744	ReceiveEcho "for [image width $_image(plot)]x[image height $_image(plot)] image>"
745	$_image(plot) configure -data $bytes
746	} elseif { $info(-type) == "print" } {
747	set tag $this-print-$info(-token)
748	set _hardcopy($tag) $bytes
749	}
750	}
751
752	#
753	# DrawLegend --
754	#
755	itcl::body Rappture::NanovisViewer::DrawLegend { cname } {
756	set c $itk_component(legend)
757	set w [winfo width $c]
758	set h [winfo height $c]
759	set lx 10
760	set ly [expr {$h - 1}]
761	if {"" == [$c find withtag colorbar]} {
762	$c create image 10 10 -anchor nw \
763	-image $_image(legend) -tags colorbar
764	$c create text $lx $ly -anchor sw \
765	-fill $itk_option(-plotforeground) -tags "limits text vmin"
766	$c create text [expr {$w-$lx}] $ly -anchor se \
767	-fill $itk_option(-plotforeground) -tags "limits text vmax"
768	$c create text [expr {$w/2}] $ly -anchor s \
769	-fill $itk_option(-plotforeground) -tags "limits text title"
770	$c lower colorbar
771	$c bind colorbar <ButtonRelease-1> [itcl::code $this AddNewMarker %x %y]
772	}
773
774	# Display the markers used by the current transfer function.
775	HideAllMarkers
776	$_transferFunctionEditors($cname) showMarkers $_limits($cname)
777
778	foreach {min max} $_limits($cname) break
779	$c itemconfigure vmin -text [format %g $min]
780	$c coords vmin $lx $ly
781
782	$c itemconfigure vmax -text [format %g $max]
783	$c coords vmax [expr {$w-$lx}] $ly
784
785	set title [$_first hints label]
786	set units [$_first hints units]
787	if { $units != "" } {
788	set title "$title ($units)"
789	}
790	$c itemconfigure title -text $title
791	$c coords title [expr {$w/2}] $ly
792
793	# The colormap may have changed. Resync the slicers with the colormap.
794	InitSettings -cutplanesvisible -xcutplanevisible -ycutplanevisible \
795	-zcutplanevisible
796	}
797
798	#
799	# ReceiveLegend --
800	#
801	# The procedure is the response from the render server to each "legend"
802	# command. The server sends back a "legend" command invoked our
803	# the slave interpreter. The purpose is to collect data of the image
804	# representing the legend in the canvas. In addition, the
805	# active transfer function is displayed.
806	#
807	itcl::body Rappture::NanovisViewer::ReceiveLegend { cname vmin vmax size } {
808	if { ![isconnected] } {
809	return
810	}
811	set bytes [ReceiveBytes $size]
812	$_image(legend) configure -data $bytes
813	ReceiveEcho <<line "<read $size bytes for [image width $_image(legend)]x[image height $_image(legend)] legend>"
814
815	DrawLegend $_current
816	}
817
818	#
819	# ReceiveData --
820	#
821	# The procedure is the response from the render server to each "data
822	# follows" command. The server sends back a "data" command invoked our
823	# the slave interpreter. The purpose is to collect the min/max of the
824	# volume sent to the render server. Since the client (nanovisviewer)
825	# doesn't parse 3D data formats, we rely on the server (nanovis) to
826	# tell us what the limits are. Once we've received the limits to all
827	# the data we've sent (tracked by _recvdDatasets) we can then determine
828	# what the transfer functions are for these volumes.
829	#
830	#
831	# Note: There is a considerable tradeoff in having the server report
832	# back what the data limits are. It means that much of the code
833	# having to do with transfer-functions has to wait for the data
834	# to come back, since the isomarkers are calculated based upon
835	# the data limits. The client code is much messier because of
836	# this. The alternative is to parse any of the 3D formats on the
837	# client side.
838	#
839	itcl::body Rappture::NanovisViewer::ReceiveData { args } {
840	if { ![isconnected] } {
841	return
842	}
843
844	# Arguments from server are name value pairs. Stuff them in an array.
845	array set info $args
846
847	set tag $info(tag)
848	set parts [split $tag -]
849
850	#
851	# Volumes don't exist until we're told about them.
852	#
853	set dataobj [lindex $parts 0]
854	set _serverDatasets($tag) 1
855	if { $_settings(-volumevisible) && $dataobj == $_first } {
856	SendCmd "volume state 1 $tag"
857	}
858	set _limits($tag) [list $info(min) $info(max)]
859	set _limits(v) [list $info(vmin) $info(vmax)]
860
861	unset _recvdDatasets($tag)
862	if { [array size _recvdDatasets] == 0 } {
863	updateTransferFunctions
864	}
865	}
866
867	# ----------------------------------------------------------------------
868	# USAGE: Rebuild
869	#
870	# Called automatically whenever something changes that affects the
871	# data in the widget. Clears any existing data and rebuilds the
872	# widget to display new data.
873	# ----------------------------------------------------------------------
874	itcl::body Rappture::NanovisViewer::Rebuild {} {
875	set w [winfo width $itk_component(3dview)]
876	set h [winfo height $itk_component(3dview)]
877	if { $w < 2 \|\| $h < 2 } {
878	update
879	$_dispatcher event -idle !rebuild
880	return
881	}
882
883	# Turn on buffering of commands to the server. We don't want to
884	# be preempted by a server disconnect/reconnect (which automatically
885	# generates a new call to Rebuild).
886	StartBufferingCommands
887
888	if { $_width != $w \|\| $_height != $h \|\| $_reset } {
889	set _width $w
890	set _height $h
891	$_arcball resize $w $h
892	DoResize
893	}
894
895	foreach dataobj [get] {
896	foreach cname [$dataobj components] {
897	set tag $dataobj-$cname
898	if { ![info exists _serverDatasets($tag)] } {
899	# Send the data as one huge base64-encoded mess -- yuck!
900	if { [$dataobj type] == "dx" } {
901	if { ![$dataobj isvalid] } {
902	puts stderr "??? $dataobj is invalid"
903	}
904	set data [$dataobj blob $cname]
905	} else {
906	set data [$dataobj vtkdata $cname]
907	if 0 {
908	set f [open "/tmp/volume.vtk" "w"]
909	fconfigure $f -translation binary -encoding binary
910	puts -nonewline $f $data
911	close $f
912	}
913	}
914	set nbytes [string length $data]
915	if { $_reportClientInfo } {
916	set info {}
917	lappend info "tool_id" [$dataobj hints toolid]
918	lappend info "tool_name" [$dataobj hints toolname]
919	lappend info "tool_title" [$dataobj hints tooltitle]
920	lappend info "tool_command" [$dataobj hints toolcommand]
921	lappend info "tool_revision" [$dataobj hints toolrevision]
922	lappend info "dataset_label" [$dataobj hints label]
923	lappend info "dataset_size" $nbytes
924	lappend info "dataset_tag" $tag
925	SendCmd "clientinfo [list $info]"
926	}
927	SendCmd "volume data follows $nbytes $tag"
928	SendData $data
929	set _recvdDatasets($tag) 1
930	set _serverDatasets($tag) 0
931	}
932	SetObjectStyle $dataobj $cname
933	}
934	}
935
936	# Outline seems to need to be reset every update.
937	InitSettings -outlinevisible -cutplanesvisible -current
938
939	set _first [lindex [get] 0]
940	if { $_reset } {
941	#
942	# Reset the camera and other view parameters
943	#
944	set _settings(-qw) $_view(-qw)
945	set _settings(-qx) $_view(-qx)
946	set _settings(-qy) $_view(-qy)
947	set _settings(-qz) $_view(-qz)
948	set _settings(-xpan) $_view(-xpan)
949	set _settings(-ypan) $_view(-ypan)
950	set _settings(-zoom) $_view(-zoom)
951
952	set q [ViewToQuaternion]
953	$_arcball quaternion $q
954	SendCmd "camera orient $q"
955	SendCmd "camera reset"
956	PanCamera
957	SendCmd "camera zoom $_view(-zoom)"
958
959	# Turn off cutplanes for all volumes
960	foreach axis {x y z} {
961	SendCmd "cutplane state 0 $axis"
962	}
963
964	InitSettings -light2side -light -volumeopacity \
965	-isosurfaceshading -gridvisible -axesvisible \
966	-xcutplanevisible -ycutplanevisible -zcutplanevisible
967
968	if {"" != $_first} {
969	set axis [$_first hints updir]
970	if { "" != $axis } {
971	SendCmd "up $axis"
972	}
973	set location [$_first hints camera]
974	if { $location != "" } {
975	array set _view $location
976	}
977	}
978	}
979
980	# nothing to send -- activate the proper ivol
981	SendCmd "volume state 0"
982	if {"" != $_first} {
983	set datasets [array names _serverDatasets $_first-*]
984	if { $datasets != "" } {
985	SendCmd "volume state 1 $datasets"
986	}
987	# If the first volume already exists on the server, then make sure
988	# we display the proper transfer function in the legend.
989	set cname [lindex [$_first components] 0]
990	if { [info exists _serverDatasets($_first-$cname)] } {
991	updateTransferFunctions
992	}
993	}
994	# Actually write the commands to the server socket. If it fails, we don't
995	# care. We're finished here.
996	blt::busy hold $itk_component(hull)
997	StopBufferingCommands
998	blt::busy release $itk_component(hull)
999	set _reset 0
1000	}
1001
1002	# ----------------------------------------------------------------------
1003	# USAGE: CurrentDatasets ?-cutplanes?
1004	#
1005	# Returns a list of volume server IDs for the current volume being
1006	# displayed. This is normally a single ID, but it might be a list
1007	# of IDs if the current data object has multiple components.
1008	# ----------------------------------------------------------------------
1009	itcl::body Rappture::NanovisViewer::CurrentDatasets {{what -all}} {
1010	set rlist ""
1011	if { $_first == "" } {
1012	return
1013	}
1014	foreach cname [$_first components] {
1015	set tag $_first-$cname
1016	if { [info exists _serverDatasets($tag)] && $_serverDatasets($tag) } {
1017	array set style {
1018	-cutplanes 1
1019	}
1020	array set style [lindex [$_first components -style $cname] 0]
1021	if { $what != "-cutplanes" \|\| $style(-cutplanes) } {
1022	lappend rlist $tag
1023	}
1024	}
1025	}
1026	return $rlist
1027	}
1028
1029	# ----------------------------------------------------------------------
1030	# USAGE: Zoom in
1031	# USAGE: Zoom out
1032	# USAGE: Zoom reset
1033	#
1034	# Called automatically when the user clicks on one of the zoom
1035	# controls for this widget. Changes the zoom for the current view.
1036	# ----------------------------------------------------------------------
1037	itcl::body Rappture::NanovisViewer::Zoom {option} {
1038	switch -- $option {
1039	"in" {
1040	set _view(-zoom) [expr {$_view(-zoom)*1.25}]
1041	set _settings(-zoom) $_view(-zoom)
1042	SendCmd "camera zoom $_view(-zoom)"
1043	}
1044	"out" {
1045	set _view(-zoom) [expr {$_view(-zoom)*0.8}]
1046	set _settings(-zoom) $_view(-zoom)
1047	SendCmd "camera zoom $_view(-zoom)"
1048	}
1049	"reset" {
1050	array set _view {
1051	-qw 0.853553
1052	-qx -0.353553
1053	-qy 0.353553
1054	-qz 0.146447
1055	-xpan 0
1056	-ypan 0
1057	-zoom 1.0
1058	}
1059	if { $_first != "" } {
1060	set location [$_first hints camera]
1061	if { $location != "" } {
1062	array set _view $location
1063	}
1064	}
1065	set q [ViewToQuaternion]
1066	$_arcball quaternion $q
1067	SendCmd "camera orient $q"
1068	SendCmd "camera reset"
1069	set _settings(-qw) $_view(-qw)
1070	set _settings(-qx) $_view(-qx)
1071	set _settings(-qy) $_view(-qy)
1072	set _settings(-qz) $_view(-qz)
1073	set _settings(-xpan) $_view(-xpan)
1074	set _settings(-ypan) $_view(-ypan)
1075	set _settings(-zoom) $_view(-zoom)
1076	}
1077	}
1078	}
1079
1080	itcl::body Rappture::NanovisViewer::PanCamera {} {
1081	set x $_view(-xpan)
1082	set y $_view(-ypan)
1083	SendCmd "camera pan $x $y"
1084	}
1085
1086	# ----------------------------------------------------------------------
1087	# USAGE: Rotate click <x> <y>
1088	# USAGE: Rotate drag <x> <y>
1089	# USAGE: Rotate release <x> <y>
1090	#
1091	# Called automatically when the user clicks/drags/releases in the
1092	# plot area. Moves the plot according to the user's actions.
1093	# ----------------------------------------------------------------------
1094	itcl::body Rappture::NanovisViewer::Rotate {option x y} {
1095	switch -- $option {
1096	click {
1097	$itk_component(3dview) configure -cursor fleur
1098	set _click(x) $x
1099	set _click(y) $y
1100	}
1101	drag {
1102	if {[array size _click] == 0} {
1103	Rotate click $x $y
1104	} else {
1105	set w [winfo width $itk_component(3dview)]
1106	set h [winfo height $itk_component(3dview)]
1107	if {$w <= 0 \|\| $h <= 0} {
1108	return
1109	}
1110
1111	if {[catch {
1112	# this fails sometimes for no apparent reason
1113	set dx [expr {double($x-$_click(x))/$w}]
1114	set dy [expr {double($y-$_click(y))/$h}]
1115	}]} {
1116	return
1117	}
1118
1119	set q [$_arcball rotate $x $y $_click(x) $_click(y)]
1120	QuaternionToView $q
1121	set _settings(-qw) $_view(-qw)
1122	set _settings(-qx) $_view(-qx)
1123	set _settings(-qy) $_view(-qy)
1124	set _settings(-qz) $_view(-qz)
1125	SendCmd "camera orient $q"
1126
1127	set _click(x) $x
1128	set _click(y) $y
1129	}
1130	}
1131	release {
1132	Rotate drag $x $y
1133	$itk_component(3dview) configure -cursor ""
1134	catch {unset _click}
1135	}
1136	default {
1137	error "bad option \"$option\": should be click, drag, release"
1138	}
1139	}
1140	}
1141
1142	# ----------------------------------------------------------------------
1143	# USAGE: $this Pan click x y
1144	# $this Pan drag x y
1145	# $this Pan release x y
1146	#
1147	# Called automatically when the user clicks on one of the zoom
1148	# controls for this widget. Changes the zoom for the current view.
1149	# ----------------------------------------------------------------------
1150	itcl::body Rappture::NanovisViewer::Pan {option x y} {
1151	# Experimental stuff
1152	set w [winfo width $itk_component(3dview)]
1153	set h [winfo height $itk_component(3dview)]
1154	if { $option == "set" } {
1155	set x [expr $x / double($w)]
1156	set y [expr $y / double($h)]
1157	set _view(-xpan) [expr $_view(-xpan) + $x]
1158	set _view(-ypan) [expr $_view(-ypan) + $y]
1159	PanCamera
1160	set _settings(-xpan) $_view(-xpan)
1161	set _settings(-ypan) $_view(-ypan)
1162	return
1163	}
1164	if { $option == "click" } {
1165	set _click(x) $x
1166	set _click(y) $y
1167	$itk_component(3dview) configure -cursor hand1
1168	}
1169	if { $option == "drag" \|\| $option == "release" } {
1170	set dx [expr ($_click(x) - $x)/double($w)]
1171	set dy [expr ($_click(y) - $y)/double($h)]
1172	set _click(x) $x
1173	set _click(y) $y
1174	set _view(-xpan) [expr $_view(-xpan) - $dx]
1175	set _view(-ypan) [expr $_view(-ypan) - $dy]
1176	PanCamera
1177	set _settings(-xpan) $_view(-xpan)
1178	set _settings(-ypan) $_view(-ypan)
1179	}
1180	if { $option == "release" } {
1181	$itk_component(3dview) configure -cursor ""
1182	}
1183	}
1184
1185	# ----------------------------------------------------------------------
1186	# USAGE: InitSettings <what> ?<value>?
1187	#
1188	# Used internally to update rendering settings whenever parameters
1189	# change in the popup settings panel. Sends the new settings off
1190	# to the back end.
1191	# ----------------------------------------------------------------------
1192	itcl::body Rappture::NanovisViewer::InitSettings { args } {
1193	foreach arg $args {
1194	AdjustSetting $arg
1195	}
1196	}
1197
1198	# ----------------------------------------------------------------------
1199	# USAGE: AdjustSetting <what> ?<value>?
1200	#
1201	# Used internally to update rendering settings whenever parameters
1202	# change in the popup settings panel. Sends the new settings off
1203	# to the back end.
1204	# ----------------------------------------------------------------------
1205	itcl::body Rappture::NanovisViewer::AdjustSetting {what {value ""}} {
1206	if {![isconnected]} {
1207	return
1208	}
1209	switch -- $what {
1210	"-axesvisible" {
1211	SendCmd "axis visible $_settings($what)"
1212	}
1213	"-background" {
1214	set bgcolor [$itk_component(background) value]
1215	array set fgcolors {
1216	"black" "white"
1217	"white" "black"
1218	"grey" "black"
1219	}
1220	configure -plotbackground $bgcolor \
1221	-plotforeground $fgcolors($bgcolor)
1222	DrawLegend $_current
1223	}
1224	"-colormap" {
1225	set color [$itk_component(colormap) value]
1226	set _settings($what) $color
1227	set _settings($_current${what}) $color
1228	ResetColormap $_current $color
1229	}
1230	"-current" {
1231	set cname [$itk_component(volcomponents) value]
1232	SwitchComponent $cname
1233	}
1234	"-cutplanesvisible" {
1235	set bool $_settings($what)
1236	# We only set cutplanes on the first dataset.
1237	set datasets [CurrentDatasets -cutplanes]
1238	set tag [lindex $datasets 0]
1239	SendCmd "cutplane visible $bool $tag"
1240	}
1241	"-gridvisible" {
1242	SendCmd "grid visible $_settings($what)"
1243	}
1244	"-isosurfaceshading" {
1245	set val $_settings($what)
1246	foreach tag [GetDatasetsWithComponent $_current] {
1247	SendCmd "volume shading isosurface $val $tag"
1248	}
1249	}
1250	"-legendvisible" {
1251	if { $_settings($what) } {
1252	blt::table $itk_component(plotarea) \
1253	0,0 $itk_component(3dview) -fill both \
1254	1,0 $itk_component(legend) -fill x
1255	blt::table configure $itk_component(plotarea) r1 -resize none
1256	} else {
1257	blt::table forget $itk_component(legend)
1258	}
1259	}
1260	"-light" {
1261	set _settings($_current${what}) $_settings($what)
1262	set val $_settings($what)
1263	set diffuse [expr {0.01*$val}]
1264	set ambient [expr {1.0-$diffuse}]
1265	set specularLevel 0.3
1266	set specularExp 90.0
1267	foreach tag [GetDatasetsWithComponent $_current] {
1268	SendCmd "volume shading ambient $ambient $tag"
1269	SendCmd "volume shading diffuse $diffuse $tag"
1270	SendCmd "volume shading specularLevel $specularLevel $tag"
1271	SendCmd "volume shading specularExp $specularExp $tag"
1272	}
1273	}
1274	"-light2side" {
1275	set _settings($_current${what}) $_settings($what)
1276	set val $_settings($what)
1277	foreach tag [GetDatasetsWithComponent $_current] {
1278	SendCmd "volume shading light2side $val $tag"
1279	}
1280	}
1281	"-outlinevisible" {
1282	SendCmd "volume outline state $_settings($what)"
1283	}
1284	"-thickness" {
1285	set val $_settings($what)
1286	set _settings($_current${what}) $val
1287	updateTransferFunctions
1288	}
1289	"-volume" {
1290	# This is the global volume visibility control. It controls the
1291	# visibility of all the all volumes. Whenever it's changed, you
1292	# have to synchronize each of the local controls (see below) with
1293	# this.
1294	set datasets [CurrentDatasets]
1295	set bool $_settings($what)
1296	SendCmd "volume data state $bool $datasets"
1297	foreach cname $_componentsList {
1298	set _settings($cname-volumevisible) $bool
1299	}
1300	set _settings(-volumevisible) $bool
1301	}
1302	"-volumeopacity" {
1303	set _settings($what) [expr $_widget($what) * 0.01]
1304	set _settings($_current${what}) $_settings($what)
1305	foreach tag [GetDatasetsWithComponent $_current] {
1306	SendCmd "volume shading opacity $_settings($what) $tag"
1307	}
1308	}
1309	"-volumevisible" {
1310	# This is the component specific control. It changes the
1311	# visibility of only the current component.
1312	set _settings($_current${what}) $_settings($what)
1313	foreach tag [GetDatasetsWithComponent $_current] {
1314	SendCmd "volume data state $_settings($what) $tag"
1315	}
1316	}
1317	"-xcutplanevisible" - "-ycutplanevisible" - "-zcutplanevisible" {
1318	set axis [string range $what 1 1]
1319	set bool $_settings($what)
1320	# We only set cutplanes on the first dataset.
1321	set datasets [CurrentDatasets -cutplanes]
1322	set tag [lindex $datasets 0]
1323	SendCmd "cutplane state $bool $axis $tag"
1324	if { $bool } {
1325	$itk_component(${axis}CutScale) configure -state normal \
1326	-troughcolor white
1327	} else {
1328	$itk_component(${axis}CutScale) configure -state disabled \
1329	-troughcolor grey82
1330	}
1331	}
1332	default {
1333	error "don't know how to fix $what"
1334	}
1335	}
1336	}
1337
1338	# ----------------------------------------------------------------------
1339	# USAGE: FixLegend
1340	#
1341	# Used internally to update the legend area whenever it changes size
1342	# or when the field changes. Asks the server to send a new legend
1343	# for the current field.
1344	# ----------------------------------------------------------------------
1345	itcl::body Rappture::NanovisViewer::FixLegend {} {
1346	set _resizeLegendPending 0
1347	set lineht [font metrics $itk_option(-font) -linespace]
1348	set w [expr {$_width-20}]
1349	set h [expr {[winfo height $itk_component(legend)]-20-$lineht}]
1350	if {$w > 0 && $h > 0 && $_first != "" } {
1351	if { [info exists _cname2transferFunction($_current)] } {
1352	SendCmd "legend $_current $w $h"
1353	}
1354	}
1355	}
1356
1357	#
1358	# NameTransferFunction --
1359	#
1360	# Creates a transfer function name based on the <style> settings in the
1361	# library run.xml file. This placeholder will be used later to create
1362	# and send the actual transfer function once the data info has been sent
1363	# to us by the render server. [We won't know the volume limits until the
1364	# server parses the 3D data and sends back the limits via ReceiveData.]
1365	#
1366	itcl::body Rappture::NanovisViewer::NameTransferFunction { dataobj cname } {
1367	array set style {
1368	-color BCGYR
1369	-levels 6
1370	-markers ""
1371	}
1372	set tag $dataobj-$cname
1373	array set style [lindex [$dataobj components -style $cname] 0]
1374	if { ![info exists _cname2transferFunction($cname)] } {
1375	# Get the colormap right now, since it doesn't change with marker
1376	# changes.
1377	set cmap [ColorsToColormap $style(-color)]
1378	set amap [list 0.0 0.0 1.0 1.0]
1379	set _cname2transferFunction($cname) [list $cmap $amap]
1380	SendCmd [list transfunc define $cname $cmap $amap]
1381	}
1382	SendCmd "volume shading transfunc $cname $tag"
1383	if { ![info exists _transferFunctionEditors($cname)] } {
1384	set _transferFunctionEditors($cname) \
1385	[Rappture::TransferFunctionEditor ::\#auto $itk_component(legend) \
1386	$cname \
1387	-command [itcl::code $this updateTransferFunctions]]
1388	}
1389	return $cname
1390	}
1391
1392	#
1393	# ComputeTransferFunction --
1394	#
1395	# Computes and sends the transfer function to the render server. It's
1396	# assumed that the volume data limits are known and that the global
1397	# transfer-functions slider values have been set up. Both parts are
1398	# needed to compute the relative value (location) of the marker, and
1399	# the alpha map of the transfer function.
1400	#
1401	itcl::body Rappture::NanovisViewer::ComputeTransferFunction { cname } {
1402	foreach {cmap amap} $_cname2transferFunction($cname) break
1403
1404	# We have to parse the style attributes for a volume using this
1405	# transfer-function once. This sets up the initial isomarkers for the
1406	# transfer function. The user may add/delete markers, so we have to
1407	# maintain a list of markers for each transfer-function. We use the one
1408	# of the volumes (the first in the list) using the transfer-function as a
1409	# reference.
1410	if { ![info exists _parsedFunction($cname)] } {
1411	array set style {
1412	-color BCGYR
1413	-levels 6
1414	-markers ""
1415	}
1416	# Accumulate the style from all the datasets using it.
1417	foreach tag [GetDatasetsWithComponent $cname] {
1418	foreach {dataobj cname} [split [lindex $tag 0] -] break
1419	array set style [lindex [$dataobj components -style $cname] 0]
1420	}
1421	eval $_transferFunctionEditors($cname) limits $_limits($cname)
1422	# Have to defer creation of isomarkers until we have data limits
1423	if { [info exists style(-markers)] &&
1424	[llength $style(-markers)] > 0 } {
1425	ParseMarkersOption $cname $style(-markers)
1426	} else {
1427	ParseLevelsOption $cname $style(-levels)
1428	}
1429
1430	}
1431	set amap [ComputeAlphamap $cname]
1432	set _cname2transferFunction($cname) [list $cmap $amap]
1433	SendCmd [list transfunc define $cname $cmap $amap]
1434	}
1435
1436	itcl::body Rappture::NanovisViewer::AddNewMarker { x y } {
1437	if { ![info exists _transferFunctionEditors($_current)] } {
1438	continue
1439	}
1440	# Add a new marker to the current transfer function
1441	$_transferFunctionEditors($_current) newMarker $x $y normal
1442	$itk_component(legend) itemconfigure labels -fill $itk_option(-plotforeground)
1443	}
1444
1445	itcl::body Rappture::NanovisViewer::RemoveMarker { x y } {
1446	if { ![info exists _transferFunctionEditors($_current)] } {
1447	continue
1448	}
1449	# Add a new marker to the current transfer function
1450	$_transferFunctionEditors($_current) deleteMarker $x $y
1451	}
1452
1453	# ----------------------------------------------------------------------
1454	# CONFIGURATION OPTION: -plotbackground
1455	# ----------------------------------------------------------------------
1456	itcl::configbody Rappture::NanovisViewer::plotbackground {
1457	if { [isconnected] } {
1458	set color $itk_option(-plotbackground)
1459	set rgb [Color2RGB $color]
1460	SendCmd "screen bgcolor $rgb"
1461	$itk_component(legend) configure -background $color
1462	}
1463	}
1464
1465	# ----------------------------------------------------------------------
1466	# CONFIGURATION OPTION: -plotforeground
1467	# ----------------------------------------------------------------------
1468	itcl::configbody Rappture::NanovisViewer::plotforeground {
1469	if { [isconnected] } {
1470	set color $itk_option(-plotforeground)
1471	set rgb [Color2RGB $color]
1472	SendCmd "volume outline color $rgb"
1473	SendCmd "grid axiscolor $rgb"
1474	SendCmd "grid linecolor $rgb"
1475	$itk_component(legend) itemconfigure labels -fill $color
1476	$itk_component(legend) itemconfigure limits -fill $color
1477	}
1478	}
1479
1480	# ----------------------------------------------------------------------
1481	# CONFIGURATION OPTION: -plotoutline
1482	# ----------------------------------------------------------------------
1483	itcl::configbody Rappture::NanovisViewer::plotoutline {
1484	# Must check if we are connected because this routine is called from the
1485	# class body when the -plotoutline itk_option is defined. At that point
1486	# the NanovisViewer class constructor hasn't been called, so we can't
1487	# start sending commands to visualization server.
1488	if { [isconnected] } {
1489	if {"" == $itk_option(-plotoutline)} {
1490	SendCmd "volume outline state off"
1491	} else {
1492	SendCmd "volume outline state on"
1493	SendCmd "volume outline color [Color2RGB $itk_option(-plotoutline)]"
1494	}
1495	}
1496	}
1497
1498	#
1499	# The -levels option takes a single value that represents the number
1500	# of evenly distributed markers based on the current data range. Each
1501	# marker is a relative value from 0.0 to 1.0.
1502	#
1503	itcl::body Rappture::NanovisViewer::ParseLevelsOption { cname levels } {
1504	set c $itk_component(legend)
1505	set list {}
1506	regsub -all "," $levels " " levels
1507	if {[string is int $levels]} {
1508	for {set i 1} { $i <= $levels } {incr i} {
1509	lappend list [expr {double($i)/($levels+1)}]
1510	}
1511	} else {
1512	foreach x $levels {
1513	lappend list $x
1514	}
1515	}
1516	set _parsedFunction($cname) 1
1517	$_transferFunctionEditors($cname) addMarkers $list
1518	$itk_component(legend) itemconfigure labels -fill $itk_option(-plotforeground)
1519	}
1520
1521	#
1522	# The -markers option takes a list of zero or more values (the values
1523	# may be separated either by spaces or commas) that have the following
1524	# format:
1525	#
1526	# N% Percent of current total data range. Converted to
1527	# to a relative value between 0.0 and 1.0.
1528	# N Absolute value of marker. If the marker is outside of
1529	# the current range, it will be displayed on the outer
1530	# edge of the legends, but it range it represents will
1531	# not be seen.
1532	#
1533	itcl::body Rappture::NanovisViewer::ParseMarkersOption { cname markers } {
1534	set c $itk_component(legend)
1535	set list {}
1536	foreach { min max } $_limits($cname) break
1537	regsub -all "," $markers " " markers
1538	foreach marker $markers {
1539	set n [scan $marker "%g%s" value suffix]
1540	if { $n == 2 && $suffix == "%" } {
1541	# $n% : Set relative value (0..1).
1542	lappend list [expr {$value * 0.01}]
1543	} else {
1544	# $n : absolute value, compute relative
1545	lappend list [expr {(double($value)-$min)/($max-$min)]}
1546	}
1547	}
1548	set _parsedFunction($cname) 1
1549	$_transferFunctionEditors($cname) addMarkers $list
1550	$itk_component(legend) itemconfigure labels -fill $itk_option(-plotforeground)
1551	}
1552
1553	# ----------------------------------------------------------------------
1554	# USAGE: UpdateTransferFuncs
1555	# ----------------------------------------------------------------------
1556	itcl::body Rappture::NanovisViewer::updateTransferFunctions {} {
1557	$_dispatcher event -idle !send_transfunc
1558	}
1559
1560	itcl::body Rappture::NanovisViewer::BuildViewTab {} {
1561	set fg [option get $itk_component(hull) font Font]
1562	#set bfg [option get $itk_component(hull) boldFont Font]
1563
1564	set inner [$itk_component(main) insert end \
1565	-title "View Settings" \
1566	-icon [Rappture::icon wrench]]
1567	$inner configure -borderwidth 4
1568
1569	set ::Rappture::NanovisViewer::_settings(-isosurfaceshading) 0
1570	checkbutton $inner.isosurface \
1571	-text "Isosurface shading" \
1572	-variable [itcl::scope _settings(-isosurfaceshading)] \
1573	-command [itcl::code $this AdjustSetting -isosurfaceshading] \
1574	-font "Arial 9"
1575
1576	checkbutton $inner.axes \
1577	-text "Axes" \
1578	-variable [itcl::scope _settings(-axesvisible)] \
1579	-command [itcl::code $this AdjustSetting -axesvisible] \
1580	-font "Arial 9"
1581
1582	checkbutton $inner.grid \
1583	-text "Grid" \
1584	-variable [itcl::scope _settings(-gridvisible)] \
1585	-command [itcl::code $this AdjustSetting -gridvisible] \
1586	-font "Arial 9"
1587
1588	checkbutton $inner.outline \
1589	-text "Outline" \
1590	-variable [itcl::scope _settings(-outlinevisible)] \
1591	-command [itcl::code $this AdjustSetting -outlinevisible] \
1592	-font "Arial 9"
1593
1594	checkbutton $inner.legend \
1595	-text "Legend" \
1596	-variable [itcl::scope _settings(-legendvisible)] \
1597	-command [itcl::code $this AdjustSetting -legendvisible] \
1598	-font "Arial 9"
1599
1600	checkbutton $inner.volume \
1601	-text "Volume" \
1602	-variable [itcl::scope _settings(-volume)] \
1603	-command [itcl::code $this AdjustSetting -volume] \
1604	-font "Arial 9"
1605
1606	label $inner.background_l -text "Background" -font "Arial 9"
1607	itk_component add background {
1608	Rappture::Combobox $inner.background -width 10 -editable no
1609	}
1610	$inner.background choices insert end \
1611	"black" "black" \
1612	"white" "white" \
1613	"grey" "grey"
1614
1615	$itk_component(background) value $_settings(-background)
1616	bind $inner.background <<Value>> \
1617	[itcl::code $this AdjustSetting -background]
1618
1619	blt::table $inner \
1620	0,0 $inner.axes -cspan 2 -anchor w \
1621	1,0 $inner.grid -cspan 2 -anchor w \
1622	2,0 $inner.outline -cspan 2 -anchor w \
1623	3,0 $inner.volume -cspan 2 -anchor w \
1624	4,0 $inner.legend -cspan 2 -anchor w \
1625	5,0 $inner.background_l -anchor e -pady 2 \
1626	5,1 $inner.background -fill x
1627
1628	blt::table configure $inner r* -resize none
1629	blt::table configure $inner r6 -resize expand
1630	}
1631
1632	itcl::body Rappture::NanovisViewer::BuildVolumeTab {} {
1633	set inner [$itk_component(main) insert end \
1634	-title "Volume Settings" \
1635	-icon [Rappture::icon volume-on]]
1636	$inner configure -borderwidth 4
1637
1638	set fg [option get $itk_component(hull) font Font]
1639	#set bfg [option get $itk_component(hull) boldFont Font]
1640
1641	label $inner.lighting_l \
1642	-text "Lighting / Material Properties" \
1643	-font "Arial 9 bold"
1644
1645	checkbutton $inner.light2side -text "Two-sided lighting" -font $fg \
1646	-variable [itcl::scope _settings(-light2side)] \
1647	-command [itcl::code $this AdjustSetting -light2side]
1648
1649	checkbutton $inner.visibility -text "Visible" -font $fg \
1650	-variable [itcl::scope _settings(-volumevisible)] \
1651	-command [itcl::code $this AdjustSetting -volumevisible]
1652
1653	label $inner.dim -text "Glow" -font $fg
1654	::scale $inner.light -from 0 -to 100 -orient horizontal \
1655	-variable [itcl::scope _settings(-light)] \
1656	-showvalue off -command [itcl::code $this AdjustSetting -light] \
1657	-troughcolor grey92
1658	label $inner.bright -text "Surface" -font $fg
1659
1660	# Opacity
1661	label $inner.opacity_l -text "Opacity" -font $fg
1662	::scale $inner.opacity -from 0 -to 100 -orient horizontal \
1663	-variable [itcl::scope _widget(-volumeopacity)] \
1664	-showvalue off \
1665	-command [itcl::code $this AdjustSetting -volumeopacity] \
1666	-troughcolor grey92
1667
1668	label $inner.transferfunction_l \
1669	-text "Transfer Function" -font "Arial 9 bold"
1670
1671	# Tooth thickness
1672	label $inner.thin -text "Thin" -font $fg
1673	::scale $inner.thickness -from 0 -to 1000 -orient horizontal \
1674	-variable [itcl::scope _settings(-thickness)] \
1675	-showvalue off -command [itcl::code $this AdjustSetting -thickness] \
1676	-troughcolor grey92
1677	label $inner.thick -text "Thick" -font $fg
1678
1679	# Colormap
1680	label $inner.colormap_l -text "Colormap" -font $fg
1681	itk_component add colormap {
1682	Rappture::Combobox $inner.colormap -width 10 -editable no
1683	}
1684
1685	$inner.colormap choices insert end [GetColormapList -includeDefault -includeNone]
1686	bind $inner.colormap <<Value>> \
1687	[itcl::code $this AdjustSetting -colormap]
1688	$itk_component(colormap) value "default"
1689	set _settings(-colormap) "default"
1690
1691	# Component
1692	label $inner.volcomponents_l -text "Component" -font $fg
1693	itk_component add volcomponents {
1694	Rappture::Combobox $inner.volcomponents -editable no
1695	}
1696	bind $inner.volcomponents <<Value>> \
1697	[itcl::code $this AdjustSetting -current]
1698
1699	blt::table $inner \
1700	0,0 $inner.volcomponents_l -anchor e -cspan 2 \
1701	0,2 $inner.volcomponents -cspan 3 -fill x \
1702	1,1 $inner.lighting_l -anchor w -cspan 4 \
1703	2,1 $inner.dim -anchor e \
1704	2,2 $inner.light -cspan 2 -fill x \
1705	2,4 $inner.bright -anchor w \
1706	3,1 $inner.light2side -cspan 3 -anchor w \
1707	4,1 $inner.visibility -cspan 3 -anchor w \
1708	5,1 $inner.transferfunction_l -cspan 4 -anchor w \
1709	6,1 $inner.opacity_l -anchor e -pady 2 \
1710	6,2 $inner.opacity -cspan 3 -fill x \
1711	7,1 $inner.colormap_l -anchor e \
1712	7,2 $inner.colormap -padx 2 -cspan 3 -fill x \
1713	8,1 $inner.thin -anchor e \
1714	8,2 $inner.thickness -cspan 2 -fill x \
1715	8,4 $inner.thick -anchor w
1716
1717	blt::table configure $inner c* r* -resize none
1718	blt::table configure $inner r* -pady { 2 0 }
1719	blt::table configure $inner c2 c3 r9 -resize expand
1720	blt::table configure $inner c0 -width .1i
1721	}
1722
1723	itcl::body Rappture::NanovisViewer::BuildCutplanesTab {} {
1724	set inner [$itk_component(main) insert end \
1725	-title "Cutplane Settings" \
1726	-icon [Rappture::icon cutbutton]]
1727	$inner configure -borderwidth 4
1728
1729	checkbutton $inner.visible \
1730	-text "Show Cutplanes" \
1731	-variable [itcl::scope _settings(-cutplanesvisible)] \
1732	-command [itcl::code $this AdjustSetting -cutplanesvisible] \
1733	-font "Arial 9"
1734
1735	# X-value slicer...
1736	itk_component add xCutButton {
1737	Rappture::PushButton $inner.xbutton \
1738	-onimage [Rappture::icon x-cutplane] \
1739	-offimage [Rappture::icon x-cutplane] \
1740	-command [itcl::code $this AdjustSetting -xcutplanevisible] \
1741	-variable [itcl::scope _settings(-xcutplanevisible)]
1742	}
1743	Rappture::Tooltip::for $itk_component(xCutButton) \
1744	"Toggle the X cut plane on/off"
1745	$itk_component(xCutButton) select
1746
1747	itk_component add xCutScale {
1748	::scale $inner.xval -from 100 -to 0 \
1749	-width 10 -orient vertical -showvalue off \
1750	-borderwidth 1 -highlightthickness 0 \
1751	-command [itcl::code $this Slice move x] \
1752	-variable [itcl::scope _settings(-xcutplaneposition)]
1753	} {
1754	usual
1755	ignore -borderwidth -highlightthickness
1756	}
1757	# Set the default cutplane value before disabling the scale.
1758	$itk_component(xCutScale) set 50
1759	$itk_component(xCutScale) configure -state disabled
1760	Rappture::Tooltip::for $itk_component(xCutScale) \
1761	"@[itcl::code $this SlicerTip x]"
1762
1763	# Y-value slicer...
1764	itk_component add yCutButton {
1765	Rappture::PushButton $inner.ybutton \
1766	-onimage [Rappture::icon y-cutplane] \
1767	-offimage [Rappture::icon y-cutplane] \
1768	-command [itcl::code $this AdjustSetting -ycutplanevisible] \
1769	-variable [itcl::scope _settings(-ycutplanevisible)]
1770	}
1771	Rappture::Tooltip::for $itk_component(yCutButton) \
1772	"Toggle the Y cut plane on/off"
1773	$itk_component(yCutButton) select
1774
1775	itk_component add yCutScale {
1776	::scale $inner.yval -from 100 -to 0 \
1777	-width 10 -orient vertical -showvalue off \
1778	-borderwidth 1 -highlightthickness 0 \
1779	-command [itcl::code $this Slice move y] \
1780	-variable [itcl::scope _settings(-ycutplaneposition)]
1781	} {
1782	usual
1783	ignore -borderwidth -highlightthickness
1784	}
1785	Rappture::Tooltip::for $itk_component(yCutScale) \
1786	"@[itcl::code $this SlicerTip y]"
1787	# Set the default cutplane value before disabling the scale.
1788	$itk_component(yCutScale) set 50
1789	$itk_component(yCutScale) configure -state disabled
1790
1791	# Z-value slicer...
1792	itk_component add zCutButton {
1793	Rappture::PushButton $inner.zbutton \
1794	-onimage [Rappture::icon z-cutplane] \
1795	-offimage [Rappture::icon z-cutplane] \
1796	-command [itcl::code $this AdjustSetting -zcutplanevisible] \
1797	-variable [itcl::scope _settings(-zcutplanevisible)]
1798	}
1799	Rappture::Tooltip::for $itk_component(zCutButton) \
1800	"Toggle the Z cut plane on/off"
1801	$itk_component(zCutButton) select
1802
1803	itk_component add zCutScale {
1804	::scale $inner.zval -from 100 -to 0 \
1805	-width 10 -orient vertical -showvalue off \
1806	-borderwidth 1 -highlightthickness 0 \
1807	-command [itcl::code $this Slice move z] \
1808	-variable [itcl::scope _settings(-zcutplaneposition)]
1809	} {
1810	usual
1811	ignore -borderwidth -highlightthickness
1812	}
1813	$itk_component(zCutScale) set 50
1814	$itk_component(zCutScale) configure -state disabled
1815	Rappture::Tooltip::for $itk_component(zCutScale) \
1816	"@[itcl::code $this SlicerTip z]"
1817
1818	blt::table $inner \
1819	0,1 $inner.visible -anchor w -pady 2 -cspan 4 \
1820	1,1 $itk_component(xCutScale) \
1821	1,2 $itk_component(yCutScale) \
1822	1,3 $itk_component(zCutScale) \
1823	2,1 $itk_component(xCutButton) \
1824	2,2 $itk_component(yCutButton) \
1825	2,3 $itk_component(zCutButton)
1826
1827	blt::table configure $inner r0 r1 r2 c* -resize none
1828	blt::table configure $inner r3 c4 -resize expand
1829	blt::table configure $inner c0 -width 2
1830	blt::table configure $inner c1 c2 c3 -padx 2
1831	}
1832
1833	itcl::body Rappture::NanovisViewer::BuildCameraTab {} {
1834	set inner [$itk_component(main) insert end \
1835	-title "Camera Settings" \
1836	-icon [Rappture::icon camera]]
1837	$inner configure -borderwidth 4
1838
1839	label $inner.view_l -text "view" -font "Arial 9"
1840	set f [frame $inner.view]
1841	foreach side { front back left right top bottom } {
1842	button $f.$side -image [Rappture::icon view$side] \
1843	-command [itcl::code $this SetOrientation $side]
1844	Rappture::Tooltip::for $f.$side "Change the view to $side"
1845	pack $f.$side -side left
1846	}
1847
1848	blt::table $inner \
1849	0,0 $inner.view_l -anchor e -pady 2 \
1850	0,1 $inner.view -anchor w -pady 2
1851	blt::table configure $inner r0 -resize none
1852
1853	set row 1
1854	set labels { qw qx qy qz xpan ypan zoom }
1855	foreach tag $labels {
1856	label $inner.${tag}label -text $tag -font "Arial 9"
1857	entry $inner.${tag} -font "Arial 9" -bg white \
1858	-textvariable [itcl::scope _settings(-$tag)]
1859	bind $inner.${tag} <Return> \
1860	[itcl::code $this camera set -${tag}]
1861	bind $inner.${tag} <KP_Enter> \
1862	[itcl::code $this camera set -${tag}]
1863	blt::table $inner \
1864	$row,0 $inner.${tag}label -anchor e -pady 2 \
1865	$row,1 $inner.${tag} -anchor w -pady 2
1866	blt::table configure $inner r$row -resize none
1867	incr row
1868	}
1869
1870	blt::table configure $inner c* -resize none
1871	blt::table configure $inner c2 -resize expand
1872	blt::table configure $inner r$row -resize expand
1873	}
1874
1875	# ----------------------------------------------------------------------
1876	# USAGE: Slice move x\|y\|z <newval>
1877	#
1878	# Called automatically when the user drags the slider to move the
1879	# cut plane that slices 3D data. Gets the current value from the
1880	# slider and moves the cut plane to the appropriate point in the
1881	# data set.
1882	# ----------------------------------------------------------------------
1883	itcl::body Rappture::NanovisViewer::Slice {option args} {
1884	switch -- $option {
1885	move {
1886	if {[llength $args] != 2} {
1887	error "wrong # args: should be \"Slice move x\|y\|z newval\""
1888	}
1889	set axis [lindex $args 0]
1890	set newval [lindex $args 1]
1891
1892	set newpos [expr {0.01*$newval}]
1893	set datasets [CurrentDatasets -cutplanes]
1894	set tag [lindex $datasets 0]
1895	SendCmd "cutplane position $newpos $axis $tag"
1896	}
1897	default {
1898	error "bad option \"$option\": should be axis, move, or volume"
1899	}
1900	}
1901	}
1902
1903	# ----------------------------------------------------------------------
1904	# USAGE: SlicerTip <axis>
1905	#
1906	# Used internally to generate a tooltip for the x/y/z slicer controls.
1907	# Returns a message that includes the current slicer value.
1908	# ----------------------------------------------------------------------
1909	itcl::body Rappture::NanovisViewer::SlicerTip {axis} {
1910	set val [$itk_component(${axis}CutScale) get]
1911	return "Move the [string toupper $axis] cut plane.\nCurrently: $axis = $val%"
1912	}
1913
1914	itcl::body Rappture::NanovisViewer::DoResize {} {
1915	$_arcball resize $_width $_height
1916	SendCmd "screen size $_width $_height"
1917	set _resizePending 0
1918	}
1919
1920	itcl::body Rappture::NanovisViewer::EventuallyResize { w h } {
1921	set _width $w
1922	set _height $h
1923	$_arcball resize $w $h
1924	if { !$_resizePending } {
1925	$_dispatcher event -idle !resize
1926	set _resizePending 1
1927	}
1928	}
1929
1930	itcl::body Rappture::NanovisViewer::EventuallyRedrawLegend {} {
1931	if { !$_resizeLegendPending } {
1932	$_dispatcher event -idle !legend
1933	set _resizeLegendPending 1
1934	}
1935	}
1936
1937	# camera --
1938	#
1939	itcl::body Rappture::NanovisViewer::camera {option args} {
1940	switch -- $option {
1941	"show" {
1942	puts [array get _view]
1943	}
1944	"set" {
1945	set what [lindex $args 0]
1946	set x $_settings($what)
1947	set code [catch { string is double $x } result]
1948	if { $code != 0 \|\| !$result } {
1949	set _settings($what) $_view($what)
1950	return
1951	}
1952	switch -- $what {
1953	"-xpan" - "-ypan" {
1954	set _view($what) $_settings($what)
1955	PanCamera
1956	}
1957	"-qx" - "-qy" - "-qz" - "-qw" {
1958	set _view($what) $_settings($what)
1959	set q [ViewToQuaternion]
1960	$_arcball quaternion $q
1961	SendCmd "camera orient $q"
1962	}
1963	"-zoom" {
1964	set _view($what) $_settings($what)
1965	SendCmd "camera zoom $_view($what)"
1966	}
1967	}
1968	}
1969	}
1970	}
1971
1972	itcl::body Rappture::NanovisViewer::SetOrientation { side } {
1973	array set positions {
1974	front "1 0 0 0"
1975	back "0 0 1 0"
1976	left "0.707107 0 -0.707107 0"
1977	right "0.707107 0 0.707107 0"
1978	top "0.707107 -0.707107 0 0"
1979	bottom "0.707107 0.707107 0 0"
1980	}
1981	foreach name { -qw -qx -qy -qz } value $positions($side) {
1982	set _view($name) $value
1983	}
1984	set q [ViewToQuaternion]
1985	$_arcball quaternion $q
1986	SendCmd "camera orient $q"
1987	SendCmd "camera reset"
1988	set _view(-xpan) 0
1989	set _view(-ypan) 0
1990	set _view(-zoom) 1.0
1991	set _settings(-xpan) $_view(-xpan)
1992	set _settings(-ypan) $_view(-ypan)
1993	set _settings(-zoom) $_view(-zoom)
1994	}
1995
1996	#
1997	# InitComponentSettings --
1998	#
1999	# Initializes the volume settings for a specific component. This should
2000	# match what's used as global settings above. This is called the first
2001	# time we try to switch to a given component in SwitchComponent below.
2002	#
2003	itcl::body Rappture::NanovisViewer::InitComponentSettings { cname } {
2004	foreach {key value} {
2005	-colormap "default"
2006	-light 40
2007	-light2side 1
2008	-thickness 350
2009	-volumeopacity 1.0
2010	-volumevisible 1
2011	} {
2012	if { ![info exists _settings($cname${key})] } {
2013	# Don't override existing component settings
2014	set _settings($cname${key}) $value
2015	}
2016	}
2017	}
2018
2019	#
2020	# SwitchComponent --
2021	#
2022	# This is called when the current component is changed by the dropdown
2023	# menu in the volume tab. It synchronizes the global volume settings
2024	# with the settings of the new current component.
2025	#
2026	itcl::body Rappture::NanovisViewer::SwitchComponent { cname } {
2027	if { ![info exists _settings($cname-light)] } {
2028	InitComponentSettings $cname
2029	}
2030	if { $_settings(-colormap) != $_settings($cname-colormap) } {
2031	set _settings(-colormap) $_settings($cname-colormap)
2032	EventuallyRedrawLegend
2033	}
2034	# _settings variables change widgets, except for colormap
2035	set _settings(-light) $_settings($cname-light)
2036	set _settings(-light2side) $_settings($cname-light2side)
2037	set _settings(-volumeopacity) $_settings($cname-volumeopacity)
2038	set _settings(-thickness) $_settings($cname-thickness)
2039	set _settings(-volumevisible) $_settings($cname-volumevisible)
2040	$itk_component(colormap) value $_settings($cname-colormap)
2041
2042	set _widget(-volumeopacity) [expr $_settings(-volumeopacity) * 100.0]
2043
2044	set _current $cname; # Reset the current component
2045	}
2046
2047	#
2048	# BuildVolumeComponents --
2049	#
2050	# This is called from the "scale" method which is called when a new
2051	# dataset is added or deleted. It repopulates the dropdown menu of
2052	# volume component names. It sets the current component to the first
2053	# component in the list (of components found). Finally, if there is
2054	# only one component, don't display the label or the combobox in the
2055	# volume settings tab.
2056	#
2057	itcl::body Rappture::NanovisViewer::BuildVolumeComponents {} {
2058	$itk_component(volcomponents) choices delete 0 end
2059	foreach name $_componentsList {
2060	$itk_component(volcomponents) choices insert end $name $name
2061	}
2062	set _current [lindex $_componentsList 0]
2063	$itk_component(volcomponents) value $_current
2064	set parent [winfo parent $itk_component(volcomponents)]
2065	if { [llength $_componentsList] <= 1 } {
2066	# Unpack the components label and dropdown if there's only one
2067	# component.
2068	blt::table forget $parent.volcomponents_l $parent.volcomponents
2069	} else {
2070	# Pack the components label and dropdown into the table there's
2071	# more than one component to select.
2072	blt::table $parent \
2073	0,0 $parent.volcomponents_l -anchor e -cspan 2 \
2074	0,2 $parent.volcomponents -cspan 3 -fill x
2075	}
2076	}
2077
2078	#
2079	# GetDatasetsWithComponents --
2080	#
2081	# Returns a list of all the datasets (known by the combination of their
2082	# data object and component name) that match the given component name.
2083	# For example, this is used where we want to change the settings of
2084	# volumes that have the current component.
2085	#
2086	itcl::body Rappture::NanovisViewer::GetDatasetsWithComponent { cname } {
2087	if { ![info exists _volcomponents($cname)] } {
2088	return ""
2089	}
2090	set list ""
2091	foreach tag $_volcomponents($cname) {
2092	if { ![info exists _serverDatasets($tag)] } {
2093	continue
2094	}
2095	lappend list $tag
2096	}
2097	return $list
2098	}
2099
2100	#
2101	# HideAllMarkers --
2102	#
2103	# Hide all the markers in all the transfer functions. Can't simply
2104	# delete and recreate markers from the <style> since the user may have
2105	# created, deleted, or moved markers.
2106	#
2107	itcl::body Rappture::NanovisViewer::HideAllMarkers {} {
2108	foreach cname [array names _transferFunctionEditors] {
2109	$_transferFunctionEditors($cname) hideMarkers
2110	}
2111	}
2112
2113	itcl::body Rappture::NanovisViewer::GetColormap { cname color } {
2114	if { $color == "default" } {
2115	return $_cname2defaultcolormap($cname)
2116	}
2117	return [ColorsToColormap $color]
2118	}
2119
2120	itcl::body Rappture::NanovisViewer::ResetColormap { cname color } {
2121	# Get the current transfer function
2122	if { ![info exists _cname2transferFunction($cname)] } {
2123	return
2124	}
2125	foreach { cmap amap } $_cname2transferFunction($cname) break
2126	set cmap [GetColormap $cname $color]
2127	set _cname2transferFunction($cname) [list $cmap $amap]
2128	SendCmd [list transfunc define $cname $cmap $amap]
2129	EventuallyRedrawLegend
2130	}
2131
2132	itcl::body Rappture::NanovisViewer::ComputeAlphamap { cname } {
2133	if { ![info exists _transferFunctionEditors($cname)] } {
2134	return [list 0.0 0.0 1.0 1.0]
2135	}
2136	if { ![info exists _settings($cname-light)] } {
2137	InitComponentSettings $cname
2138	}
2139
2140	set isovalues [$_transferFunctionEditors($cname) values]
2141
2142	# Transfer function should be normalized with [0,1] range
2143	# The volume shading opacity setting is used to scale opacity
2144	# in the volume shader.
2145	set max 1.0
2146
2147	# Use the component-wise thickness setting from the slider
2148	# settings widget
2149	# Scale values between 0.00001 and 0.01000
2150	set delta [expr {double($_settings($cname-thickness)) * 0.0001}]
2151
2152	set first [lindex $isovalues 0]
2153	set last [lindex $isovalues end]
2154	set amap ""
2155	if { $first == "" \|\| $first != 0.0 } {
2156	lappend amap 0.0 0.0
2157	}
2158	foreach x $isovalues {
2159	set x1 [expr {$x-$delta-0.00001}]
2160	set x2 [expr {$x-$delta}]
2161	set x3 [expr {$x+$delta}]
2162	set x4 [expr {$x+$delta+0.00001}]
2163	if { $x1 < 0.0 } {
2164	set x1 0.0
2165	} elseif { $x1 > 1.0 } {
2166	set x1 1.0
2167	}
2168	if { $x2 < 0.0 } {
2169	set x2 0.0
2170	} elseif { $x2 > 1.0 } {
2171	set x2 1.0
2172	}
2173	if { $x3 < 0.0 } {
2174	set x3 0.0
2175	} elseif { $x3 > 1.0 } {
2176	set x3 1.0
2177	}
2178	if { $x4 < 0.0 } {
2179	set x4 0.0
2180	} elseif { $x4 > 1.0 } {
2181	set x4 1.0
2182	}
2183	# add spikes in the middle
2184	lappend amap $x1 0.0
2185	lappend amap $x2 $max
2186	lappend amap $x3 $max
2187	lappend amap $x4 0.0
2188	}
2189	if { $last == "" \|\| $last != 1.0 } {
2190	lappend amap 1.0 0.0
2191	}
2192	return $amap
2193	}
2194
2195	itcl::body Rappture::NanovisViewer::SetObjectStyle { dataobj cname } {
2196	array set style {
2197	-opacity 0.5
2198	}
2199	array set style [lindex [$dataobj components -style $cname] 0]
2200	# Some tools erroneously set -opacity to 1 in style, so
2201	# override the requested opacity for now
2202	set style(-opacity) 0.5
2203	set _settings($cname-volumeopacity) $style(-opacity)
2204	set tag $dataobj-$cname
2205	SendCmd "volume shading opacity $_settings($cname-volumeopacity) $tag"
2206	NameTransferFunction $dataobj $cname
2207	}

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