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source: branches/1.4/gui/scripts/nanovisviewer.tcl @ 5291

Last change on this file since 5291 was 5291, checked in by ldelgass, 9 years ago
merge r5289 from trunk
File size: 80.5 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 GetVolumeInfo { w }
103	private method HideAllMarkers {}
104	private method InitComponentSettings { cname }
105	private method InitSettings { args }
106	private method NameTransferFunction { dataobj comp }
107	private method Pan {option x y}
108	private method PanCamera {}
109	private method ParseLevelsOption { cname levels }
110	private method ParseMarkersOption { cname markers }
111	private method QuaternionToView { q } {
112	foreach { _view(-qw) _view(-qx) _view(-qy) _view(-qz) } $q break
113	}
114	private method Rebuild {}
115	private method ReceiveData { args }
116	private method ReceiveImage { args }
117	private method ReceiveLegend { tf vmin vmax size }
118	private method RemoveMarker { x y }
119	private method ResetColormap { cname color }
120	private method Rotate {option x y}
121	private method SendTransferFunctions {}
122	private method SetObjectStyle { dataobj cname }
123	private method SetOrientation { side }
124	private method Slice {option args}
125	private method SlicerTip {axis}
126	private method SwitchComponent { cname }
127	private method ToggleVolume { tag name }
128	private method ViewToQuaternion {} {
129	return [list $_view(-qw) $_view(-qx) $_view(-qy) $_view(-qz)]
130	}
131	private method Zoom {option}
132
133	private variable _arcball ""
134
135	private variable _dlist "" ;# list of data objects
136	private variable _obj2ovride ;# maps dataobj => style override
137	private variable _serverDatasets ;# contains all the dataobj-component
138	;# to volumes in the server
139	private variable _recvdDatasets ;# list of data objs to send to server
140
141	private variable _reset 1 ;# Connection to server has been reset.
142	private variable _click ;# Info used for rotate operations.
143	private variable _limits ;# Autoscale min/max for all axes
144	private variable _view ;# View params for 3D view
145	private variable _parsedFunction
146	private variable _transferFunctionEditors
147	private variable _settings
148	private variable _widget
149
150	private variable _first "" ;# This is the topmost volume.
151	private variable _current "" ;# Currently selected component
152	private variable _volcomponents ;# Array of components found
153	private variable _componentsList ;# Array of components found
154	private variable _cname2transferFunction
155	private variable _cname2defaultcolormap
156
157	common _downloadPopup ;# download options from popup
158	private common _hardcopy
159	private variable _width 0
160	private variable _height 0
161	private variable _resizePending 0
162	private variable _resizeLegendPending 0
163	}
164
165	itk::usual NanovisViewer {
166	keep -background -foreground -cursor -font
167	keep -plotbackground -plotforeground
168	}
169
170	# ----------------------------------------------------------------------
171	# CONSTRUCTOR
172	# ----------------------------------------------------------------------
173	itcl::body Rappture::NanovisViewer::constructor {hostlist args} {
174	set _serverType "nanovis"
175
176	# Draw legend event
177	$_dispatcher register !legend
178	$_dispatcher dispatch $this !legend "[itcl::code $this FixLegend]; list"
179
180	# Send transfer functions event
181	$_dispatcher register !send_transfunc
182	$_dispatcher dispatch $this !send_transfunc \
183	"[itcl::code $this SendTransferFunctions]; list"
184
185	# Rebuild event
186	$_dispatcher register !rebuild
187	$_dispatcher dispatch $this !rebuild "[itcl::code $this Rebuild]; list"
188
189	# Resize event
190	$_dispatcher register !resize
191	$_dispatcher dispatch $this !resize "[itcl::code $this DoResize]; list"
192
193	#
194	# Populate parser with commands handle incoming requests
195	#
196	$_parser alias image [itcl::code $this ReceiveImage]
197	$_parser alias legend [itcl::code $this ReceiveLegend]
198	$_parser alias data [itcl::code $this ReceiveData]
199
200	# Initialize the view to some default parameters.
201	array set _view {
202	-qw 0.853553
203	-qx -0.353553
204	-qy 0.353553
205	-qz 0.146447
206	-xpan 0
207	-ypan 0
208	-zoom 1.0
209	}
210	set _arcball [blt::arcball create 100 100]
211	$_arcball quaternion [ViewToQuaternion]
212
213	set _limits(v) [list 0.0 1.0]
214	set _reset 1
215
216	array set _settings {
217	-axesvisible 1
218	-background black
219	-colormap "default"
220	-cutplanesvisible 0
221	-gridvisible 0
222	-isosurfaceshading 0
223	-legendvisible 1
224	-light 40
225	-light2side 1
226	-outlinevisible 0
227	-qw 0.853553
228	-qx -0.353553
229	-qy 0.353553
230	-qz 0.146447
231	-thickness 350
232	-volume 1
233	-volumeopacity 0.5
234	-volumevisible 1
235	-xcutplaneposition 50
236	-xcutplanevisible 1
237	-xpan 0
238	-ycutplaneposition 50
239	-ycutplanevisible 1
240	-ypan 0
241	-zcutplaneposition 50
242	-zcutplanevisible 1
243	-zoom 1.0
244	}
245	array set _widget {
246	-volumeopacity 50
247	}
248	itk_component add 3dview {
249	label $itk_component(plotarea).view -image $_image(plot) \
250	-highlightthickness 0 -borderwidth 0
251	} {
252	usual
253	ignore -highlightthickness -borderwidth -background
254	}
255	bind $itk_component(3dview) <Control-F1> [itcl::code $this ToggleConsole]
256
257	set f [$itk_component(main) component controls]
258	itk_component add reset {
259	button $f.reset -borderwidth 1 -padx 1 -pady 1 \
260	-highlightthickness 0 \
261	-image [Rappture::icon reset-view] \
262	-command [itcl::code $this Zoom reset]
263	} {
264	usual
265	ignore -highlightthickness
266	}
267	pack $itk_component(reset) -side top -padx 2 -pady 2
268	Rappture::Tooltip::for $itk_component(reset) \
269	"Reset the view to the default zoom level"
270
271	itk_component add zoomin {
272	button $f.zin -borderwidth 1 -padx 1 -pady 1 \
273	-highlightthickness 0 \
274	-image [Rappture::icon zoom-in] \
275	-command [itcl::code $this Zoom in]
276	} {
277	usual
278	ignore -highlightthickness
279	}
280	pack $itk_component(zoomin) -side top -padx 2 -pady 2
281	Rappture::Tooltip::for $itk_component(zoomin) "Zoom in"
282
283	itk_component add zoomout {
284	button $f.zout -borderwidth 1 -padx 1 -pady 1 \
285	-highlightthickness 0 \
286	-image [Rappture::icon zoom-out] \
287	-command [itcl::code $this Zoom out]
288	} {
289	usual
290	ignore -highlightthickness
291	}
292	pack $itk_component(zoomout) -side top -padx 2 -pady 2
293	Rappture::Tooltip::for $itk_component(zoomout) "Zoom out"
294
295	itk_component add volume {
296	Rappture::PushButton $f.volume \
297	-onimage [Rappture::icon volume-on] \
298	-offimage [Rappture::icon volume-off] \
299	-command [itcl::code $this AdjustSetting -volume] \
300	-variable [itcl::scope _settings(-volume)]
301	}
302	$itk_component(volume) select
303	Rappture::Tooltip::for $itk_component(volume) \
304	"Toggle the volume cloud on/off"
305	pack $itk_component(volume) -padx 2 -pady 2
306
307	itk_component add cutplane {
308	Rappture::PushButton $f.cutplane \
309	-onimage [Rappture::icon cutbutton] \
310	-offimage [Rappture::icon cutbutton] \
311	-variable [itcl::scope _settings(-cutplanesvisible)] \
312	-command [itcl::code $this AdjustSetting -cutplanesvisible]
313	}
314	Rappture::Tooltip::for $itk_component(cutplane) \
315	"Show/Hide cutplanes"
316	pack $itk_component(cutplane) -padx 2 -pady 2
317
318	if { [catch {
319	BuildViewTab
320	BuildVolumeTab
321	BuildCutplanesTab
322	BuildCameraTab
323	} errs] != 0 } {
324	global errorInfo
325	puts stderr "errs=$errs errorInfo=$errorInfo"
326	}
327
328	# Legend
329	set _image(legend) [image create photo]
330	itk_component add legend {
331	canvas $itk_component(plotarea).legend -height 50 -highlightthickness 0
332	} {
333	usual
334	ignore -highlightthickness
335	rename -background -plotbackground plotBackground Background
336	}
337	bind $itk_component(legend) <Configure> \
338	[itcl::code $this EventuallyRedrawLegend]
339	bind $itk_component(legend) <KeyPress-Delete> \
340	[itcl::code $this RemoveMarker %x %y]
341	bind $itk_component(legend) <Enter> \
342	[list focus $itk_component(legend)]
343
344	# Hack around the Tk panewindow. The problem is that the requested
345	# size of the 3d view isn't set until an image is retrieved from
346	# the server. So the panewindow uses the tiny size.
347	set w 10000
348	pack forget $itk_component(3dview)
349	blt::table $itk_component(plotarea) \
350	0,0 $itk_component(3dview) -fill both -reqwidth $w \
351	1,0 $itk_component(legend) -fill x
352	blt::table configure $itk_component(plotarea) r1 -resize none
353
354	# Bindings for rotation via mouse
355	bind $itk_component(3dview) <ButtonPress-1> \
356	[itcl::code $this Rotate click %x %y]
357	bind $itk_component(3dview) <B1-Motion> \
358	[itcl::code $this Rotate drag %x %y]
359	bind $itk_component(3dview) <ButtonRelease-1> \
360	[itcl::code $this Rotate release %x %y]
361	bind $itk_component(3dview) <Configure> \
362	[itcl::code $this EventuallyResize %w %h]
363
364	# Bindings for panning via mouse
365	bind $itk_component(3dview) <ButtonPress-2> \
366	[itcl::code $this Pan click %x %y]
367	bind $itk_component(3dview) <B2-Motion> \
368	[itcl::code $this Pan drag %x %y]
369	bind $itk_component(3dview) <ButtonRelease-2> \
370	[itcl::code $this Pan release %x %y]
371
372	# Bindings for panning via keyboard
373	bind $itk_component(3dview) <KeyPress-Left> \
374	[itcl::code $this Pan set -10 0]
375	bind $itk_component(3dview) <KeyPress-Right> \
376	[itcl::code $this Pan set 10 0]
377	bind $itk_component(3dview) <KeyPress-Up> \
378	[itcl::code $this Pan set 0 -10]
379	bind $itk_component(3dview) <KeyPress-Down> \
380	[itcl::code $this Pan set 0 10]
381	bind $itk_component(3dview) <Shift-KeyPress-Left> \
382	[itcl::code $this Pan set -2 0]
383	bind $itk_component(3dview) <Shift-KeyPress-Right> \
384	[itcl::code $this Pan set 2 0]
385	bind $itk_component(3dview) <Shift-KeyPress-Up> \
386	[itcl::code $this Pan set 0 -2]
387	bind $itk_component(3dview) <Shift-KeyPress-Down> \
388	[itcl::code $this Pan set 0 2]
389
390	# Bindings for zoom via keyboard
391	bind $itk_component(3dview) <KeyPress-Prior> \
392	[itcl::code $this Zoom out]
393	bind $itk_component(3dview) <KeyPress-Next> \
394	[itcl::code $this Zoom in]
395
396	bind $itk_component(3dview) <Enter> "focus $itk_component(3dview)"
397
398	if {[string equal "x11" [tk windowingsystem]]} {
399	# Bindings for zoom via mouse
400	bind $itk_component(3dview) <4> [itcl::code $this Zoom out]
401	bind $itk_component(3dview) <5> [itcl::code $this Zoom in]
402	}
403
404	set _image(download) [image create photo]
405
406	eval itk_initialize $args
407
408	EnableWaitDialog 900
409	Connect
410	}
411
412	# ----------------------------------------------------------------------
413	# DESTRUCTOR
414	# ----------------------------------------------------------------------
415	itcl::body Rappture::NanovisViewer::destructor {} {
416	$_dispatcher cancel !rebuild
417	$_dispatcher cancel !send_transfunc
418	$_dispatcher cancel !resize
419	image delete $_image(plot)
420	image delete $_image(legend)
421	image delete $_image(download)
422	foreach cname [array names _transferFunctionEditors] {
423	itcl::delete object $_transferFunctionEditors($cname)
424	}
425	catch { blt::arcball destroy $_arcball }
426	array unset _settings
427	}
428
429	# ----------------------------------------------------------------------
430	# USAGE: add <dataobj> ?<settings>?
431	#
432	# Clients use this to add a data object to the plot. The optional
433	# <settings> are used to configure the plot. Allowed settings are
434	# -color, -brightness, -width, -linestyle, and -raise.
435	# ----------------------------------------------------------------------
436	itcl::body Rappture::NanovisViewer::add {dataobj {settings ""}} {
437	if { ![$dataobj isvalid] } {
438	return; # Object doesn't contain valid data.
439	}
440	array set params {
441	-color auto
442	-width 1
443	-linestyle solid
444	-brightness 0
445	-raise 0
446	-description ""
447	-param ""
448	}
449	array set params $settings
450
451	if {$params(-color) == "auto" \|\| $params(-color) == "autoreset"} {
452	# can't handle -autocolors yet
453	set params(-color) black
454	}
455	set pos [lsearch -exact $_dlist $dataobj]
456	if {$pos < 0} {
457	lappend _dlist $dataobj
458	set _obj2ovride($dataobj-color) $params(-color)
459	set _obj2ovride($dataobj-width) $params(-width)
460	set _obj2ovride($dataobj-raise) $params(-raise)
461	$_dispatcher event -idle !rebuild
462	}
463	}
464
465	# ----------------------------------------------------------------------
466	# USAGE: get ?-objects?
467	# USAGE: get ?-image 3dview\|legend?
468	#
469	# Clients use this to query the list of objects being plotted, in
470	# order from bottom to top of this result. The optional "-image"
471	# flag can also request the internal images being shown.
472	# ----------------------------------------------------------------------
473	itcl::body Rappture::NanovisViewer::get {args} {
474	if {[llength $args] == 0} {
475	set args "-objects"
476	}
477
478	set op [lindex $args 0]
479	switch -- $op {
480	-objects {
481	# put the dataobj list in order according to -raise options
482	set dlist $_dlist
483	foreach obj $dlist {
484	if {[info exists _obj2ovride($obj-raise)] &&
485	$_obj2ovride($obj-raise)} {
486	set i [lsearch -exact $dlist $obj]
487	if {$i >= 0} {
488	set dlist [lreplace $dlist $i $i]
489	lappend dlist $obj
490	}
491	}
492	}
493	return $dlist
494	}
495	-image {
496	if {[llength $args] != 2} {
497	error "wrong # args: should be \"get -image 3dview\|legend\""
498	}
499	switch -- [lindex $args end] {
500	3dview {
501	return $_image(plot)
502	}
503	legend {
504	return $_image(legend)
505	}
506	default {
507	error "bad image name \"[lindex $args end]\": should be 3dview or legend"
508	}
509	}
510	}
511	default {
512	error "bad option \"$op\": should be -objects or -image"
513	}
514	}
515	}
516
517	# ----------------------------------------------------------------------
518	# USAGE: delete ?<dataobj1> <dataobj2> ...?
519	#
520	# Clients use this to delete a dataobj from the plot. If no dataobjs
521	# are specified, then all dataobjs are deleted. No data objects are
522	# deleted. They are only removed from the display list.
523	#
524	# ----------------------------------------------------------------------
525	itcl::body Rappture::NanovisViewer::delete {args} {
526	if {[llength $args] == 0} {
527	set args $_dlist
528	}
529	# Delete all specified dataobjs
530	set changed 0
531	foreach dataobj $args {
532	set pos [lsearch -exact $_dlist $dataobj]
533	if { $pos >= 0 } {
534	set _dlist [lreplace $_dlist $pos $pos]
535	array unset _obj2ovride $dataobj-*
536	set changed 1
537	}
538	}
539	# If anything changed, then rebuild the plot
540	if {$changed} {
541	$_dispatcher event -idle !rebuild
542	}
543	}
544
545	# ----------------------------------------------------------------------
546	# USAGE: scale ?<data1> <data2> ...?
547	#
548	# Sets the default limits for the overall plot according to the
549	# limits of the data for all of the given <data> objects. This
550	# accounts for all objects--even those not showing on the screen.
551	# Because of this, the limits are appropriate for all objects as
552	# the user scans through data in the ResultSet viewer.
553	# ----------------------------------------------------------------------
554	itcl::body Rappture::NanovisViewer::scale {args} {
555	array set style {
556	-color BCGYR
557	-levels 6
558	-markers ""
559	}
560	array unset _limits
561	array unset _volcomponents
562	foreach dataobj $args {
563	if { ![$dataobj isvalid] } {
564	continue; # Object doesn't contain valid data.
565	}
566	foreach cname [$dataobj components] {
567	if { ![info exists _volcomponents($cname)] } {
568	lappend _componentsList $cname
569	array set style [lindex [$dataobj components -style $cname] 0]
570	set cmap [ColorsToColormap $style(-color)]
571	set _cname2defaultcolormap($cname) $cmap
572	set _settings($cname-colormap) $style(-color)
573	}
574	lappend _volcomponents($cname) $dataobj-$cname
575	array unset limits
576	array set limits [$dataobj valueLimits $cname]
577	set _limits($cname) $limits(v)
578	}
579	foreach axis {x y z v} {
580	foreach { min max } [$dataobj limits $axis] break
581	if {"" != $min && "" != $max} {
582	if { ![info exists _limits($axis)] } {
583	set _limits($axis) [list $min $max]
584	continue
585	}
586	foreach {amin amax} $_limits($axis) break
587	if {$min < $amin} {
588	set amin $min
589	}
590	if {$max > $amax} {
591	set amax $max
592	}
593	set _limits($axis) [list $amin $amax]
594	}
595	}
596	}
597	BuildVolumeComponents
598	}
599
600	# ----------------------------------------------------------------------
601	# USAGE: download coming
602	# USAGE: download controls <downloadCommand>
603	# USAGE: download now
604	#
605	# Clients use this method to create a downloadable representation
606	# of the plot. Returns a list of the form {ext string}, where
607	# "ext" is the file extension (indicating the type of data) and
608	# "string" is the data itself.
609	# ----------------------------------------------------------------------
610	itcl::body Rappture::NanovisViewer::download {option args} {
611	switch $option {
612	coming {
613	if {[catch {
614	blt::winop snap $itk_component(plotarea) $_image(download)
615	}]} {
616	$_image(download) configure -width 1 -height 1
617	$_image(download) put #000000
618	}
619	}
620	controls {
621	# no controls for this download yet
622	return ""
623	}
624	now {
625	# Get the image data (as base64) and decode it back to binary.
626	# This is better than writing to temporary files. When we switch
627	# to the BLT picture image it won't be necessary to decode the
628	# image data.
629	if { [image width $_image(plot)] > 0 &&
630	[image height $_image(plot)] > 0 } {
631	set bytes [$_image(plot) data -format "jpeg -quality 100"]
632	set bytes [Rappture::encoding::decode -as b64 $bytes]
633	return [list .jpg $bytes]
634	}
635	return ""
636	}
637	default {
638	error "bad option \"$option\": should be coming, controls, now"
639	}
640	}
641	}
642
643	# ----------------------------------------------------------------------
644	# USAGE: Connect ?<host:port>,<host:port>...?
645	#
646	# Clients use this method to establish a connection to a new
647	# server, or to reestablish a connection to the previous server.
648	# Any existing connection is automatically closed.
649	# ----------------------------------------------------------------------
650	itcl::body Rappture::NanovisViewer::Connect {} {
651	set _hosts [GetServerList "nanovis"]
652	if { "" == $_hosts } {
653	return 0
654	}
655	set _reset 1
656	set result [VisViewer::Connect $_hosts]
657	if { $result } {
658	if { $_reportClientInfo } {
659	# Tell the server the viewer, hub, user and session.
660	# Do this immediately on connect before buffering any commands
661	global env
662
663	set info {}
664	set user "???"
665	if { [info exists env(USER)] } {
666	set user $env(USER)
667	}
668	set session "???"
669	if { [info exists env(SESSION)] } {
670	set session $env(SESSION)
671	}
672	lappend info "version" "$Rappture::version"
673	lappend info "build" "$Rappture::build"
674	lappend info "svnurl" "$Rappture::svnurl"
675	lappend info "installdir" "$Rappture::installdir"
676	lappend info "hub" [exec hostname]
677	lappend info "client" "nanovisviewer"
678	lappend info "user" $user
679	lappend info "session" $session
680	SendCmd "clientinfo [list $info]"
681	}
682
683	set w [winfo width $itk_component(3dview)]
684	set h [winfo height $itk_component(3dview)]
685	EventuallyResize $w $h
686	}
687	return $result
688	}
689
690	#
691	# isconnected --
692	#
693	# Indicates if we are currently connected to the visualization server.
694	#
695	itcl::body Rappture::NanovisViewer::isconnected {} {
696	return [VisViewer::IsConnected]
697	}
698
699	#
700	# disconnect --
701	#
702	itcl::body Rappture::NanovisViewer::disconnect {} {
703	Disconnect
704	}
705
706	#
707	# Disconnect --
708	#
709	# Clients use this method to disconnect from the current rendering
710	# server.
711	#
712	itcl::body Rappture::NanovisViewer::Disconnect {} {
713	VisViewer::Disconnect
714
715	# disconnected -- no more data sitting on server
716	array unset _serverDatasets
717	}
718
719	# ----------------------------------------------------------------------
720	# USAGE: SendTransferFunctions
721	# ----------------------------------------------------------------------
722	itcl::body Rappture::NanovisViewer::SendTransferFunctions {} {
723	foreach cname [array names _volcomponents] {
724	ComputeTransferFunction $cname
725	}
726	FixLegend
727	}
728
729	# ----------------------------------------------------------------------
730	# USAGE: ReceiveImage -bytes <size> -type <type> -token <token>
731	#
732	# Invoked automatically whenever the "image" command comes in from
733	# the rendering server. Indicates that binary image data with the
734	# specified <size> will follow.
735	# ----------------------------------------------------------------------
736	itcl::body Rappture::NanovisViewer::ReceiveImage { args } {
737	array set info {
738	-token "???"
739	-bytes 0
740	-type image
741	}
742	array set info $args
743	set bytes [ReceiveBytes $info(-bytes)]
744	ReceiveEcho <<line "<read $info(-bytes) bytes"
745	if { $info(-type) == "image" } {
746	ReceiveEcho "for [image width $_image(plot)]x[image height $_image(plot)] image>"
747	$_image(plot) configure -data $bytes
748	} elseif { $info(-type) == "print" } {
749	set tag $this-print-$info(-token)
750	set _hardcopy($tag) $bytes
751	}
752	}
753
754	#
755	# DrawLegend --
756	#
757	itcl::body Rappture::NanovisViewer::DrawLegend { cname } {
758	set c $itk_component(legend)
759	set w [winfo width $c]
760	set h [winfo height $c]
761	set lx 10
762	set ly [expr {$h - 1}]
763	if {"" == [$c find withtag colorbar]} {
764	$c create image 10 10 -anchor nw \
765	-image $_image(legend) -tags colorbar
766	$c create text $lx $ly -anchor sw \
767	-fill $itk_option(-plotforeground) -tags "limits text vmin"
768	$c create text [expr {$w-$lx}] $ly -anchor se \
769	-fill $itk_option(-plotforeground) -tags "limits text vmax"
770	$c create text [expr {$w/2}] $ly -anchor s \
771	-fill $itk_option(-plotforeground) -tags "limits text title"
772	$c lower colorbar
773	$c bind colorbar <ButtonRelease-1> [itcl::code $this AddNewMarker %x %y]
774	}
775
776	# Display the markers used by the current transfer function.
777	HideAllMarkers
778	$_transferFunctionEditors($cname) showMarkers $_limits($cname)
779
780	foreach {min max} $_limits($cname) break
781	$c itemconfigure vmin -text [format %g $min]
782	$c coords vmin $lx $ly
783
784	$c itemconfigure vmax -text [format %g $max]
785	$c coords vmax [expr {$w-$lx}] $ly
786
787	set title [$_first hints label]
788	set units [$_first hints units]
789	if { $units != "" } {
790	set title "$title ($units)"
791	}
792	$c itemconfigure title -text $title
793	$c coords title [expr {$w/2}] $ly
794
795	# The colormap may have changed. Resync the slicers with the colormap.
796	InitSettings -cutplanesvisible -xcutplanevisible -ycutplanevisible \
797	-zcutplanevisible
798	}
799
800	#
801	#
802	# ReceiveLegend --
803	#
804	# The procedure is the response from the render server to each "legend"
805	# command. The server sends back a "legend" command invoked our
806	# the slave interpreter. The purpose is to collect data of the image
807	# representing the legend in the canvas. In addition, the
808	# active transfer function is displayed.
809	#
810	#
811	itcl::body Rappture::NanovisViewer::ReceiveLegend { cname vmin vmax size } {
812	if { ![isconnected] } {
813	return
814	}
815	set bytes [ReceiveBytes $size]
816	$_image(legend) configure -data $bytes
817	ReceiveEcho <<line "<read $size bytes for [image width $_image(legend)]x[image height $_image(legend)] legend>"
818
819	DrawLegend $_current
820	}
821
822	#
823	# ReceiveData --
824	#
825	# The procedure is the response from the render server to each "data
826	# follows" command. The server sends back a "data" command invoked our
827	# the slave interpreter. The purpose is to collect the min/max of the
828	# volume sent to the render server. Since the client (nanovisviewer)
829	# doesn't parse 3D data formats, we rely on the server (nanovis) to
830	# tell us what the limits are. Once we've received the limits to all
831	# the data we've sent (tracked by _recvdDatasets) we can then determine
832	# what the transfer functions are for these volumes.
833	#
834	#
835	# Note: There is a considerable tradeoff in having the server report
836	# back what the data limits are. It means that much of the code
837	# having to do with transfer-functions has to wait for the data
838	# to come back, since the isomarkers are calculated based upon
839	# the data limits. The client code is much messier because of
840	# this. The alternative is to parse any of the 3D formats on the
841	# client side.
842	#
843	itcl::body Rappture::NanovisViewer::ReceiveData { args } {
844	if { ![isconnected] } {
845	return
846	}
847
848	# Arguments from server are name value pairs. Stuff them in an array.
849	array set info $args
850
851	set tag $info(tag)
852	set parts [split $tag -]
853
854	#
855	# Volumes don't exist until we're told about them.
856	#
857	set dataobj [lindex $parts 0]
858	set _serverDatasets($tag) 1
859	if { $_settings(-volumevisible) && $dataobj == $_first } {
860	SendCmd "volume state 1 $tag"
861	}
862	set _limits($tag) [list $info(min) $info(max)]
863	set _limits(v) [list $info(vmin) $info(vmax)]
864
865	unset _recvdDatasets($tag)
866	if { [array size _recvdDatasets] == 0 } {
867	updateTransferFunctions
868	}
869	}
870
871	# ----------------------------------------------------------------------
872	# USAGE: Rebuild
873	#
874	# Called automatically whenever something changes that affects the
875	# data in the widget. Clears any existing data and rebuilds the
876	# widget to display new data.
877	# ----------------------------------------------------------------------
878	itcl::body Rappture::NanovisViewer::Rebuild {} {
879	set w [winfo width $itk_component(3dview)]
880	set h [winfo height $itk_component(3dview)]
881	if { $w < 2 \|\| $h < 2 } {
882	update
883	$_dispatcher event -idle !rebuild
884	return
885	}
886
887	# Turn on buffering of commands to the server. We don't want to
888	# be preempted by a server disconnect/reconnect (which automatically
889	# generates a new call to Rebuild).
890	StartBufferingCommands
891
892	if { $_width != $w \|\| $_height != $h \|\| $_reset } {
893	set _width $w
894	set _height $h
895	$_arcball resize $w $h
896	DoResize
897	}
898
899	foreach dataobj [get] {
900	foreach cname [$dataobj components] {
901	set tag $dataobj-$cname
902	if { ![info exists _serverDatasets($tag)] } {
903	# Send the data as one huge base64-encoded mess -- yuck!
904	if { [$dataobj type] == "dx" } {
905	if { ![$dataobj isvalid] } {
906	puts stderr "??? $dataobj is invalid"
907	}
908	set data [$dataobj blob $cname]
909	} else {
910	set data [$dataobj vtkdata $cname]
911	if 0 {
912	set f [open "/tmp/volume.vtk" "w"]
913	fconfigure $f -translation binary -encoding binary
914	puts -nonewline $f $data
915	close $f
916	}
917	}
918	set nbytes [string length $data]
919	if { $_reportClientInfo } {
920	set info {}
921	lappend info "tool_id" [$dataobj hints toolid]
922	lappend info "tool_name" [$dataobj hints toolname]
923	lappend info "tool_title" [$dataobj hints tooltitle]
924	lappend info "tool_command" [$dataobj hints toolcommand]
925	lappend info "tool_revision" [$dataobj hints toolrevision]
926	lappend info "dataset_label" [$dataobj hints label]
927	lappend info "dataset_size" $nbytes
928	lappend info "dataset_tag" $tag
929	SendCmd "clientinfo [list $info]"
930	}
931	SendCmd "volume data follows $nbytes $tag"
932	SendData $data
933	set _recvdDatasets($tag) 1
934	set _serverDatasets($tag) 0
935	}
936	SetObjectStyle $dataobj $cname
937	}
938	}
939
940	# Outline seems to need to be reset every update.
941	InitSettings -outlinevisible -cutplanesvisible -current
942
943	set _first [lindex [get] 0]
944	if { $_reset } {
945	#
946	# Reset the camera and other view parameters
947	#
948	set _settings(-qw) $_view(-qw)
949	set _settings(-qx) $_view(-qx)
950	set _settings(-qy) $_view(-qy)
951	set _settings(-qz) $_view(-qz)
952	set _settings(-xpan) $_view(-xpan)
953	set _settings(-ypan) $_view(-ypan)
954	set _settings(-zoom) $_view(-zoom)
955
956	set q [ViewToQuaternion]
957	$_arcball quaternion $q
958	SendCmd "camera orient $q"
959	SendCmd "camera reset"
960	PanCamera
961	SendCmd "camera zoom $_view(-zoom)"
962
963	# Turn off cutplanes for all volumes
964	foreach axis {x y z} {
965	SendCmd "cutplane state 0 $axis"
966	}
967
968	InitSettings -light2side -light -volumeopacity \
969	-isosurfaceshading -gridvisible -axesvisible \
970	-xcutplanevisible -ycutplanevisible -zcutplanevisible
971
972	if {"" != $_first} {
973	set axis [$_first hints updir]
974	if { "" != $axis } {
975	SendCmd "up $axis"
976	}
977	set location [$_first hints camera]
978	if { $location != "" } {
979	array set _view $location
980	}
981	}
982	}
983
984	# nothing to send -- activate the proper ivol
985	SendCmd "volume state 0"
986	if {"" != $_first} {
987	set datasets [array names _serverDatasets $_first-*]
988	if { $datasets != "" } {
989	SendCmd "volume state 1 $datasets"
990	}
991	# If the first volume already exists on the server, then make sure
992	# we display the proper transfer function in the legend.
993	set cname [lindex [$_first components] 0]
994	if { [info exists _serverDatasets($_first-$cname)] } {
995	updateTransferFunctions
996	}
997	}
998	# Actually write the commands to the server socket. If it fails, we don't
999	# care. We're finished here.
1000	blt::busy hold $itk_component(hull)
1001	StopBufferingCommands
1002	blt::busy release $itk_component(hull)
1003	set _reset 0
1004	}
1005
1006	# ----------------------------------------------------------------------
1007	# USAGE: CurrentDatasets ?-cutplanes?
1008	#
1009	# Returns a list of volume server IDs for the current volume being
1010	# displayed. This is normally a single ID, but it might be a list
1011	# of IDs if the current data object has multiple components.
1012	# ----------------------------------------------------------------------
1013	itcl::body Rappture::NanovisViewer::CurrentDatasets {{what -all}} {
1014	set rlist ""
1015	if { $_first == "" } {
1016	return
1017	}
1018	foreach cname [$_first components] {
1019	set tag $_first-$cname
1020	if { [info exists _serverDatasets($tag)] && $_serverDatasets($tag) } {
1021	array set style {
1022	-cutplanes 1
1023	}
1024	array set style [lindex [$_first components -style $cname] 0]
1025	if { $what != "-cutplanes" \|\| $style(-cutplanes) } {
1026	lappend rlist $tag
1027	}
1028	}
1029	}
1030	return $rlist
1031	}
1032
1033	# ----------------------------------------------------------------------
1034	# USAGE: Zoom in
1035	# USAGE: Zoom out
1036	# USAGE: Zoom reset
1037	#
1038	# Called automatically when the user clicks on one of the zoom
1039	# controls for this widget. Changes the zoom for the current view.
1040	# ----------------------------------------------------------------------
1041	itcl::body Rappture::NanovisViewer::Zoom {option} {
1042	switch -- $option {
1043	"in" {
1044	set _view(-zoom) [expr {$_view(-zoom)*1.25}]
1045	set _settings(-zoom) $_view(-zoom)
1046	SendCmd "camera zoom $_view(-zoom)"
1047	}
1048	"out" {
1049	set _view(-zoom) [expr {$_view(-zoom)*0.8}]
1050	set _settings(-zoom) $_view(-zoom)
1051	SendCmd "camera zoom $_view(-zoom)"
1052	}
1053	"reset" {
1054	array set _view {
1055	-qw 0.853553
1056	-qx -0.353553
1057	-qy 0.353553
1058	-qz 0.146447
1059	-xpan 0
1060	-ypan 0
1061	-zoom 1.0
1062	}
1063	if { $_first != "" } {
1064	set location [$_first hints camera]
1065	if { $location != "" } {
1066	array set _view $location
1067	}
1068	}
1069	set q [ViewToQuaternion]
1070	$_arcball quaternion $q
1071	SendCmd "camera orient $q"
1072	SendCmd "camera reset"
1073	set _settings(-qw) $_view(-qw)
1074	set _settings(-qx) $_view(-qx)
1075	set _settings(-qy) $_view(-qy)
1076	set _settings(-qz) $_view(-qz)
1077	set _settings(-xpan) $_view(-xpan)
1078	set _settings(-ypan) $_view(-ypan)
1079	set _settings(-zoom) $_view(-zoom)
1080	}
1081	}
1082	}
1083
1084	itcl::body Rappture::NanovisViewer::PanCamera {} {
1085	set x $_view(-xpan)
1086	set y $_view(-ypan)
1087	SendCmd "camera pan $x $y"
1088	}
1089
1090
1091	# ----------------------------------------------------------------------
1092	# USAGE: Rotate click <x> <y>
1093	# USAGE: Rotate drag <x> <y>
1094	# USAGE: Rotate release <x> <y>
1095	#
1096	# Called automatically when the user clicks/drags/releases in the
1097	# plot area. Moves the plot according to the user's actions.
1098	# ----------------------------------------------------------------------
1099	itcl::body Rappture::NanovisViewer::Rotate {option x y} {
1100	switch -- $option {
1101	click {
1102	$itk_component(3dview) configure -cursor fleur
1103	set _click(x) $x
1104	set _click(y) $y
1105	}
1106	drag {
1107	if {[array size _click] == 0} {
1108	Rotate click $x $y
1109	} else {
1110	set w [winfo width $itk_component(3dview)]
1111	set h [winfo height $itk_component(3dview)]
1112	if {$w <= 0 \|\| $h <= 0} {
1113	return
1114	}
1115
1116	if {[catch {
1117	# this fails sometimes for no apparent reason
1118	set dx [expr {double($x-$_click(x))/$w}]
1119	set dy [expr {double($y-$_click(y))/$h}]
1120	}]} {
1121	return
1122	}
1123
1124	set q [$_arcball rotate $x $y $_click(x) $_click(y)]
1125	QuaternionToView $q
1126	set _settings(-qw) $_view(-qw)
1127	set _settings(-qx) $_view(-qx)
1128	set _settings(-qy) $_view(-qy)
1129	set _settings(-qz) $_view(-qz)
1130	SendCmd "camera orient $q"
1131
1132	set _click(x) $x
1133	set _click(y) $y
1134	}
1135	}
1136	release {
1137	Rotate drag $x $y
1138	$itk_component(3dview) configure -cursor ""
1139	catch {unset _click}
1140	}
1141	default {
1142	error "bad option \"$option\": should be click, drag, release"
1143	}
1144	}
1145	}
1146
1147	# ----------------------------------------------------------------------
1148	# USAGE: $this Pan click x y
1149	# $this Pan drag x y
1150	# $this Pan release x y
1151	#
1152	# Called automatically when the user clicks on one of the zoom
1153	# controls for this widget. Changes the zoom for the current view.
1154	# ----------------------------------------------------------------------
1155	itcl::body Rappture::NanovisViewer::Pan {option x y} {
1156	# Experimental stuff
1157	set w [winfo width $itk_component(3dview)]
1158	set h [winfo height $itk_component(3dview)]
1159	if { $option == "set" } {
1160	set x [expr $x / double($w)]
1161	set y [expr $y / double($h)]
1162	set _view(-xpan) [expr $_view(-xpan) + $x]
1163	set _view(-ypan) [expr $_view(-ypan) + $y]
1164	PanCamera
1165	set _settings(-xpan) $_view(-xpan)
1166	set _settings(-ypan) $_view(-ypan)
1167	return
1168	}
1169	if { $option == "click" } {
1170	set _click(x) $x
1171	set _click(y) $y
1172	$itk_component(3dview) configure -cursor hand1
1173	}
1174	if { $option == "drag" \|\| $option == "release" } {
1175	set dx [expr ($_click(x) - $x)/double($w)]
1176	set dy [expr ($_click(y) - $y)/double($h)]
1177	set _click(x) $x
1178	set _click(y) $y
1179	set _view(-xpan) [expr $_view(-xpan) - $dx]
1180	set _view(-ypan) [expr $_view(-ypan) - $dy]
1181	PanCamera
1182	set _settings(-xpan) $_view(-xpan)
1183	set _settings(-ypan) $_view(-ypan)
1184	}
1185	if { $option == "release" } {
1186	$itk_component(3dview) configure -cursor ""
1187	}
1188	}
1189
1190	# ----------------------------------------------------------------------
1191	# USAGE: InitSettings <what> ?<value>?
1192	#
1193	# Used internally to update rendering settings whenever parameters
1194	# change in the popup settings panel. Sends the new settings off
1195	# to the back end.
1196	# ----------------------------------------------------------------------
1197	itcl::body Rappture::NanovisViewer::InitSettings { args } {
1198	foreach arg $args {
1199	AdjustSetting $arg
1200	}
1201	}
1202
1203	# ----------------------------------------------------------------------
1204	# USAGE: AdjustSetting <what> ?<value>?
1205	#
1206	# Used internally to update rendering settings whenever parameters
1207	# change in the popup settings panel. Sends the new settings off
1208	# to the back end.
1209	# ----------------------------------------------------------------------
1210	itcl::body Rappture::NanovisViewer::AdjustSetting {what {value ""}} {
1211	if {![isconnected]} {
1212	return
1213	}
1214	switch -- $what {
1215	"-axesvisible" {
1216	SendCmd "axis visible $_settings($what)"
1217	}
1218	"-background" {
1219	set bgcolor [$itk_component(background) value]
1220	array set fgcolors {
1221	"black" "white"
1222	"white" "black"
1223	"grey" "black"
1224	}
1225	configure -plotbackground $bgcolor \
1226	-plotforeground $fgcolors($bgcolor)
1227	DrawLegend $_current
1228	}
1229	"-colormap" {
1230	set color [$itk_component(colormap) value]
1231	set _settings($what) $color
1232	set _settings($_current${what}) $color
1233	ResetColormap $_current $color
1234	}
1235	"-current" {
1236	set cname [$itk_component(volcomponents) value]
1237	SwitchComponent $cname
1238	}
1239	"-cutplanesvisible" {
1240	set bool $_settings($what)
1241	# We only set cutplanes on the first dataset.
1242	set datasets [CurrentDatasets -cutplanes]
1243	set tag [lindex $datasets 0]
1244	SendCmd "cutplane visible $bool $tag"
1245	}
1246	"-gridvisible" {
1247	SendCmd "grid visible $_settings($what)"
1248	}
1249	"-isosurfaceshading" {
1250	set val $_settings($what)
1251	foreach tag [GetDatasetsWithComponent $_current] {
1252	SendCmd "volume shading isosurface $val $tag"
1253	}
1254	}
1255	"-legendvisible" {
1256	if { $_settings($what) } {
1257	blt::table $itk_component(plotarea) \
1258	0,0 $itk_component(3dview) -fill both \
1259	1,0 $itk_component(legend) -fill x
1260	blt::table configure $itk_component(plotarea) r1 -resize none
1261	} else {
1262	blt::table forget $itk_component(legend)
1263	}
1264	}
1265	"-light" {
1266	set _settings($_current${what}) $_settings($what)
1267	set val $_settings($what)
1268	set diffuse [expr {0.01*$val}]
1269	set ambient [expr {1.0-$diffuse}]
1270	set specularLevel 0.3
1271	set specularExp 90.0
1272	foreach tag [GetDatasetsWithComponent $_current] {
1273	SendCmd "volume shading ambient $ambient $tag"
1274	SendCmd "volume shading diffuse $diffuse $tag"
1275	SendCmd "volume shading specularLevel $specularLevel $tag"
1276	SendCmd "volume shading specularExp $specularExp $tag"
1277	}
1278	}
1279	"-light2side" {
1280	set _settings($_current${what}) $_settings($what)
1281	set val $_settings($what)
1282	foreach tag [GetDatasetsWithComponent $_current] {
1283	SendCmd "volume shading light2side $val $tag"
1284	}
1285	}
1286	"-outlinevisible" {
1287	SendCmd "volume outline state $_settings($what)"
1288	}
1289	"-thickness" {
1290	set val $_settings($what)
1291	set _settings($_current${what}) $val
1292	updateTransferFunctions
1293	}
1294	"-volume" {
1295	# This is the global volume visibility control. It controls the
1296	# visibility of all the all volumes. Whenever it's changed, you
1297	# have to synchronize each of the local controls (see below) with
1298	# this.
1299	set datasets [CurrentDatasets]
1300	set bool $_settings($what)
1301	SendCmd "volume data state $bool $datasets"
1302	foreach cname $_componentsList {
1303	set _settings($cname-volumevisible) $bool
1304	}
1305	set _settings(-volumevisible) $bool
1306	}
1307	"-volumeopacity" {
1308	set _settings($what) [expr $_widget($what) * 0.01]
1309	set _settings($_current${what}) $_settings($what)
1310	foreach tag [GetDatasetsWithComponent $_current] {
1311	SendCmd "volume shading opacity $_settings($what) $tag"
1312	}
1313	}
1314	"-volumevisible" {
1315	# This is the component specific control. It changes the
1316	# visibility of only the current component.
1317	set _settings($_current${what}) $_settings($what)
1318	foreach tag [GetDatasetsWithComponent $_current] {
1319	SendCmd "volume data state $_settings($what) $tag"
1320	}
1321	}
1322	"-xcutplanevisible" - "-ycutplanevisible" - "-zcutplanevisible" {
1323	set axis [string range $what 1 1]
1324	set bool $_settings($what)
1325	# We only set cutplanes on the first dataset.
1326	set datasets [CurrentDatasets -cutplanes]
1327	set tag [lindex $datasets 0]
1328	SendCmd "cutplane state $bool $axis $tag"
1329	if { $bool } {
1330	$itk_component(${axis}CutScale) configure -state normal \
1331	-troughcolor white
1332	} else {
1333	$itk_component(${axis}CutScale) configure -state disabled \
1334	-troughcolor grey82
1335	}
1336	}
1337	default {
1338	error "don't know how to fix $what"
1339	}
1340	}
1341	}
1342
1343	# ----------------------------------------------------------------------
1344	# USAGE: FixLegend
1345	#
1346	# Used internally to update the legend area whenever it changes size
1347	# or when the field changes. Asks the server to send a new legend
1348	# for the current field.
1349	# ----------------------------------------------------------------------
1350	itcl::body Rappture::NanovisViewer::FixLegend {} {
1351	set _resizeLegendPending 0
1352	set lineht [font metrics $itk_option(-font) -linespace]
1353	set w [expr {$_width-20}]
1354	set h [expr {[winfo height $itk_component(legend)]-20-$lineht}]
1355	if {$w > 0 && $h > 0 && $_first != "" } {
1356	if { [info exists _cname2transferFunction($_current)] } {
1357	SendCmd "legend $_current $w $h"
1358	}
1359	}
1360	}
1361
1362	#
1363	# NameTransferFunction --
1364	#
1365	# Creates a transfer function name based on the <style> settings in the
1366	# library run.xml file. This placeholder will be used later to create
1367	# and send the actual transfer function once the data info has been sent
1368	# to us by the render server. [We won't know the volume limits until the
1369	# server parses the 3D data and sends back the limits via ReceiveData.]
1370	#
1371	itcl::body Rappture::NanovisViewer::NameTransferFunction { dataobj cname } {
1372	array set style {
1373	-color BCGYR
1374	-levels 6
1375	-markers ""
1376	}
1377	set tag $dataobj-$cname
1378	array set style [lindex [$dataobj components -style $cname] 0]
1379	if { ![info exists _cname2transferFunction($cname)] } {
1380	# Get the colormap right now, since it doesn't change with marker
1381	# changes.
1382	set cmap [ColorsToColormap $style(-color)]
1383	set amap [list 0.0 0.0 1.0 1.0]
1384	set _cname2transferFunction($cname) [list $cmap $amap]
1385	SendCmd [list transfunc define $cname $cmap $amap]
1386	}
1387	SendCmd "volume shading transfunc $cname $tag"
1388	if { ![info exists _transferFunctionEditors($cname)] } {
1389	set _transferFunctionEditors($cname) \
1390	[Rappture::TransferFunctionEditor ::\#auto $itk_component(legend) \
1391	$cname \
1392	-command [itcl::code $this updateTransferFunctions]]
1393	}
1394	return $cname
1395	}
1396
1397	#
1398	# ComputeTransferFunction --
1399	#
1400	# Computes and sends the transfer function to the render server. It's
1401	# assumed that the volume data limits are known and that the global
1402	# transfer-functions slider values have been set up. Both parts are
1403	# needed to compute the relative value (location) of the marker, and
1404	# the alpha map of the transfer function.
1405	#
1406	itcl::body Rappture::NanovisViewer::ComputeTransferFunction { cname } {
1407	foreach {cmap amap} $_cname2transferFunction($cname) break
1408
1409	# We have to parse the style attributes for a volume using this
1410	# transfer-function once. This sets up the initial isomarkers for the
1411	# transfer function. The user may add/delete markers, so we have to
1412	# maintain a list of markers for each transfer-function. We use the one
1413	# of the volumes (the first in the list) using the transfer-function as a
1414	# reference.
1415	if { ![info exists _parsedFunction($cname)] } {
1416	array set style {
1417	-color BCGYR
1418	-levels 6
1419	-markers ""
1420	}
1421	# Accumulate the style from all the datasets using it.
1422	foreach tag [GetDatasetsWithComponent $cname] {
1423	foreach {dataobj cname} [split [lindex $tag 0] -] break
1424	array set style [lindex [$dataobj components -style $cname] 0]
1425	}
1426	eval $_transferFunctionEditors($cname) limits $_limits($cname)
1427	# Have to defer creation of isomarkers until we have data limits
1428	if { [info exists style(-markers)] &&
1429	[llength $style(-markers)] > 0 } {
1430	ParseMarkersOption $cname $style(-markers)
1431	} else {
1432	ParseLevelsOption $cname $style(-levels)
1433	}
1434
1435	}
1436	set amap [ComputeAlphamap $cname]
1437	set _cname2transferFunction($cname) [list $cmap $amap]
1438	SendCmd [list transfunc define $cname $cmap $amap]
1439	}
1440
1441	itcl::body Rappture::NanovisViewer::AddNewMarker { x y } {
1442	if { ![info exists _transferFunctionEditors($_current)] } {
1443	continue
1444	}
1445	# Add a new marker to the current transfer function
1446	$_transferFunctionEditors($_current) newMarker $x $y normal
1447	$itk_component(legend) itemconfigure labels -fill $itk_option(-plotforeground)
1448	}
1449
1450	itcl::body Rappture::NanovisViewer::RemoveMarker { x y } {
1451	if { ![info exists _transferFunctionEditors($_current)] } {
1452	continue
1453	}
1454	# Add a new marker to the current transfer function
1455	$_transferFunctionEditors($_current) deleteMarker $x $y
1456	}
1457
1458	# ----------------------------------------------------------------------
1459	# CONFIGURATION OPTION: -plotbackground
1460	# ----------------------------------------------------------------------
1461	itcl::configbody Rappture::NanovisViewer::plotbackground {
1462	if { [isconnected] } {
1463	set color $itk_option(-plotbackground)
1464	set rgb [Color2RGB $color]
1465	SendCmd "screen bgcolor $rgb"
1466	$itk_component(legend) configure -background $color
1467	}
1468	}
1469
1470	# ----------------------------------------------------------------------
1471	# CONFIGURATION OPTION: -plotforeground
1472	# ----------------------------------------------------------------------
1473	itcl::configbody Rappture::NanovisViewer::plotforeground {
1474	if { [isconnected] } {
1475	set color $itk_option(-plotforeground)
1476	set rgb [Color2RGB $color]
1477	SendCmd "volume outline color $rgb"
1478	SendCmd "grid axiscolor $rgb"
1479	SendCmd "grid linecolor $rgb"
1480	$itk_component(legend) itemconfigure labels -fill $color
1481	$itk_component(legend) itemconfigure limits -fill $color
1482	}
1483	}
1484
1485	# ----------------------------------------------------------------------
1486	# CONFIGURATION OPTION: -plotoutline
1487	# ----------------------------------------------------------------------
1488	itcl::configbody Rappture::NanovisViewer::plotoutline {
1489	# Must check if we are connected because this routine is called from the
1490	# class body when the -plotoutline itk_option is defined. At that point
1491	# the NanovisViewer class constructor hasn't been called, so we can't
1492	# start sending commands to visualization server.
1493	if { [isconnected] } {
1494	if {"" == $itk_option(-plotoutline)} {
1495	SendCmd "volume outline state off"
1496	} else {
1497	SendCmd "volume outline state on"
1498	SendCmd "volume outline color [Color2RGB $itk_option(-plotoutline)]"
1499	}
1500	}
1501	}
1502
1503	#
1504	# The -levels option takes a single value that represents the number
1505	# of evenly distributed markers based on the current data range. Each
1506	# marker is a relative value from 0.0 to 1.0.
1507	#
1508	itcl::body Rappture::NanovisViewer::ParseLevelsOption { cname levels } {
1509	set c $itk_component(legend)
1510	set list {}
1511	regsub -all "," $levels " " levels
1512	if {[string is int $levels]} {
1513	for {set i 1} { $i <= $levels } {incr i} {
1514	lappend list [expr {double($i)/($levels+1)}]
1515	}
1516	} else {
1517	foreach x $levels {
1518	lappend list $x
1519	}
1520	}
1521	set _parsedFunction($cname) 1
1522	$_transferFunctionEditors($cname) addMarkers $list
1523	$itk_component(legend) itemconfigure labels -fill $itk_option(-plotforeground)
1524	}
1525
1526	#
1527	# The -markers option takes a list of zero or more values (the values
1528	# may be separated either by spaces or commas) that have the following
1529	# format:
1530	#
1531	# N% Percent of current total data range. Converted to
1532	# to a relative value between 0.0 and 1.0.
1533	# N Absolute value of marker. If the marker is outside of
1534	# the current range, it will be displayed on the outer
1535	# edge of the legends, but it range it represents will
1536	# not be seen.
1537	#
1538	itcl::body Rappture::NanovisViewer::ParseMarkersOption { cname markers } {
1539	set c $itk_component(legend)
1540	set list {}
1541	foreach { min max } $_limits($cname) break
1542	regsub -all "," $markers " " markers
1543	foreach marker $markers {
1544	set n [scan $marker "%g%s" value suffix]
1545	if { $n == 2 && $suffix == "%" } {
1546	# $n% : Set relative value (0..1).
1547	lappend list [expr {$value * 0.01}]
1548	} else {
1549	# $n : absolute value, compute relative
1550	lappend list [expr {(double($value)-$min)/($max-$min)]}
1551	}
1552	}
1553	set _parsedFunction($cname) 1
1554	$_transferFunctionEditors($cname) addMarkers $list
1555	$itk_component(legend) itemconfigure labels -fill $itk_option(-plotforeground)
1556	}
1557
1558	# ----------------------------------------------------------------------
1559	# USAGE: UpdateTransferFuncs
1560	# ----------------------------------------------------------------------
1561	itcl::body Rappture::NanovisViewer::updateTransferFunctions {} {
1562	$_dispatcher event -idle !send_transfunc
1563	}
1564
1565	itcl::body Rappture::NanovisViewer::BuildViewTab {} {
1566	set fg [option get $itk_component(hull) font Font]
1567	#set bfg [option get $itk_component(hull) boldFont Font]
1568
1569	set inner [$itk_component(main) insert end \
1570	-title "View Settings" \
1571	-icon [Rappture::icon wrench]]
1572	$inner configure -borderwidth 4
1573
1574	set ::Rappture::NanovisViewer::_settings(-isosurfaceshading) 0
1575	checkbutton $inner.isosurface \
1576	-text "Isosurface shading" \
1577	-variable [itcl::scope _settings(-isosurfaceshading)] \
1578	-command [itcl::code $this AdjustSetting -isosurfaceshading] \
1579	-font "Arial 9"
1580
1581	checkbutton $inner.axes \
1582	-text "Axes" \
1583	-variable [itcl::scope _settings(-axesvisible)] \
1584	-command [itcl::code $this AdjustSetting -axesvisible] \
1585	-font "Arial 9"
1586
1587	checkbutton $inner.grid \
1588	-text "Grid" \
1589	-variable [itcl::scope _settings(-gridvisible)] \
1590	-command [itcl::code $this AdjustSetting -gridvisible] \
1591	-font "Arial 9"
1592
1593	checkbutton $inner.outline \
1594	-text "Outline" \
1595	-variable [itcl::scope _settings(-outlinevisible)] \
1596	-command [itcl::code $this AdjustSetting -outlinevisible] \
1597	-font "Arial 9"
1598
1599	checkbutton $inner.legend \
1600	-text "Legend" \
1601	-variable [itcl::scope _settings(-legendvisible)] \
1602	-command [itcl::code $this AdjustSetting -legendvisible] \
1603	-font "Arial 9"
1604
1605	checkbutton $inner.volume \
1606	-text "Volume" \
1607	-variable [itcl::scope _settings(-volume)] \
1608	-command [itcl::code $this AdjustSetting -volume] \
1609	-font "Arial 9"
1610
1611	label $inner.background_l -text "Background" -font "Arial 9"
1612	itk_component add background {
1613	Rappture::Combobox $inner.background -width 10 -editable no
1614	}
1615	$inner.background choices insert end \
1616	"black" "black" \
1617	"white" "white" \
1618	"grey" "grey"
1619
1620	$itk_component(background) value $_settings(-background)
1621	bind $inner.background <<Value>> \
1622	[itcl::code $this AdjustSetting -background]
1623
1624	blt::table $inner \
1625	0,0 $inner.axes -cspan 2 -anchor w \
1626	1,0 $inner.grid -cspan 2 -anchor w \
1627	2,0 $inner.outline -cspan 2 -anchor w \
1628	3,0 $inner.volume -cspan 2 -anchor w \
1629	4,0 $inner.legend -cspan 2 -anchor w \
1630	5,0 $inner.background_l -anchor e -pady 2 \
1631	5,1 $inner.background -fill x \
1632
1633	if 0 {
1634	bind $inner <Map> [itcl::code $this GetVolumeInfo $inner]
1635	}
1636	blt::table configure $inner r* -resize none
1637	blt::table configure $inner r6 -resize expand
1638	}
1639
1640	itcl::body Rappture::NanovisViewer::BuildVolumeTab {} {
1641	set inner [$itk_component(main) insert end \
1642	-title "Volume Settings" \
1643	-icon [Rappture::icon volume-on]]
1644	$inner configure -borderwidth 4
1645
1646	set fg [option get $itk_component(hull) font Font]
1647	#set bfg [option get $itk_component(hull) boldFont Font]
1648
1649	label $inner.lighting_l \
1650	-text "Lighting / Material Properties" \
1651	-font "Arial 9 bold"
1652
1653	checkbutton $inner.light2side -text "Two-sided lighting" -font $fg \
1654	-variable [itcl::scope _settings(-light2side)] \
1655	-command [itcl::code $this AdjustSetting -light2side]
1656
1657	checkbutton $inner.visibility -text "Visible" -font $fg \
1658	-variable [itcl::scope _settings(-volumevisible)] \
1659	-command [itcl::code $this AdjustSetting -volumevisible]
1660
1661	label $inner.dim -text "Glow" -font $fg
1662	::scale $inner.light -from 0 -to 100 -orient horizontal \
1663	-variable [itcl::scope _settings(-light)] \
1664	-showvalue off -command [itcl::code $this AdjustSetting -light] \
1665	-troughcolor grey92
1666	label $inner.bright -text "Surface" -font $fg
1667
1668	# Opacity
1669	label $inner.opacity_l -text "Opacity" -font $fg
1670	::scale $inner.opacity -from 0 -to 100 -orient horizontal \
1671	-variable [itcl::scope _widget(-volumeopacity)] \
1672	-showvalue off \
1673	-command [itcl::code $this AdjustSetting -volumeopacity] \
1674	-troughcolor grey92
1675
1676	label $inner.transferfunction_l \
1677	-text "Transfer Function" -font "Arial 9 bold"
1678
1679	# Tooth thickness
1680	label $inner.thin -text "Thin" -font $fg
1681	::scale $inner.thickness -from 0 -to 1000 -orient horizontal \
1682	-variable [itcl::scope _settings(-thickness)] \
1683	-showvalue off -command [itcl::code $this AdjustSetting -thickness] \
1684	-troughcolor grey92
1685	label $inner.thick -text "Thick" -font $fg
1686
1687	# Colormap
1688	label $inner.colormap_l -text "Colormap" -font $fg
1689	itk_component add colormap {
1690	Rappture::Combobox $inner.colormap -width 10 -editable no
1691	}
1692
1693	$inner.colormap choices insert end [GetColormapList -includeDefault -includeNone]
1694	bind $inner.colormap <<Value>> \
1695	[itcl::code $this AdjustSetting -colormap]
1696	$itk_component(colormap) value "default"
1697	set _settings(-colormap) "default"
1698
1699	# Component
1700	label $inner.volcomponents_l -text "Component" -font $fg
1701	itk_component add volcomponents {
1702	Rappture::Combobox $inner.volcomponents -editable no
1703	}
1704	bind $inner.volcomponents <<Value>> \
1705	[itcl::code $this AdjustSetting -current]
1706
1707	blt::table $inner \
1708	0,0 $inner.volcomponents_l -anchor e -cspan 2 \
1709	0,2 $inner.volcomponents -cspan 3 -fill x \
1710	1,1 $inner.lighting_l -anchor w -cspan 4 \
1711	2,1 $inner.dim -anchor e \
1712	2,2 $inner.light -cspan 2 -fill x \
1713	2,4 $inner.bright -anchor w \
1714	3,1 $inner.light2side -cspan 3 -anchor w \
1715	4,1 $inner.visibility -cspan 3 -anchor w \
1716	5,1 $inner.transferfunction_l -cspan 4 -anchor w \
1717	6,1 $inner.opacity_l -anchor e -pady 2 \
1718	6,2 $inner.opacity -cspan 3 -fill x \
1719	7,1 $inner.colormap_l -anchor e \
1720	7,2 $inner.colormap -padx 2 -cspan 3 -fill x \
1721	8,1 $inner.thin -anchor e \
1722	8,2 $inner.thickness -cspan 2 -fill x \
1723	8,4 $inner.thick -anchor w
1724
1725	blt::table configure $inner c* r* -resize none
1726	blt::table configure $inner r* -pady { 2 0 }
1727	blt::table configure $inner c2 c3 r9 -resize expand
1728	blt::table configure $inner c0 -width .1i
1729	}
1730
1731	itcl::body Rappture::NanovisViewer::BuildCutplanesTab {} {
1732	set inner [$itk_component(main) insert end \
1733	-title "Cutplane Settings" \
1734	-icon [Rappture::icon cutbutton]]
1735	$inner configure -borderwidth 4
1736
1737	checkbutton $inner.visible \
1738	-text "Show Cutplanes" \
1739	-variable [itcl::scope _settings(-cutplanesvisible)] \
1740	-command [itcl::code $this AdjustSetting -cutplanesvisible] \
1741	-font "Arial 9"
1742
1743	# X-value slicer...
1744	itk_component add xCutButton {
1745	Rappture::PushButton $inner.xbutton \
1746	-onimage [Rappture::icon x-cutplane] \
1747	-offimage [Rappture::icon x-cutplane] \
1748	-command [itcl::code $this AdjustSetting -xcutplanevisible] \
1749	-variable [itcl::scope _settings(-xcutplanevisible)]
1750	}
1751	Rappture::Tooltip::for $itk_component(xCutButton) \
1752	"Toggle the X cut plane on/off"
1753	$itk_component(xCutButton) select
1754
1755	itk_component add xCutScale {
1756	::scale $inner.xval -from 100 -to 0 \
1757	-width 10 -orient vertical -showvalue off \
1758	-borderwidth 1 -highlightthickness 0 \
1759	-command [itcl::code $this Slice move x] \
1760	-variable [itcl::scope _settings(-xcutplaneposition)]
1761	} {
1762	usual
1763	ignore -borderwidth -highlightthickness
1764	}
1765	# Set the default cutplane value before disabling the scale.
1766	$itk_component(xCutScale) set 50
1767	$itk_component(xCutScale) configure -state disabled
1768	Rappture::Tooltip::for $itk_component(xCutScale) \
1769	"@[itcl::code $this SlicerTip x]"
1770
1771	# Y-value slicer...
1772	itk_component add yCutButton {
1773	Rappture::PushButton $inner.ybutton \
1774	-onimage [Rappture::icon y-cutplane] \
1775	-offimage [Rappture::icon y-cutplane] \
1776	-command [itcl::code $this AdjustSetting -ycutplanevisible] \
1777	-variable [itcl::scope _settings(-ycutplanevisible)]
1778	}
1779	Rappture::Tooltip::for $itk_component(yCutButton) \
1780	"Toggle the Y cut plane on/off"
1781	$itk_component(yCutButton) select
1782
1783	itk_component add yCutScale {
1784	::scale $inner.yval -from 100 -to 0 \
1785	-width 10 -orient vertical -showvalue off \
1786	-borderwidth 1 -highlightthickness 0 \
1787	-command [itcl::code $this Slice move y] \
1788	-variable [itcl::scope _settings(-ycutplaneposition)]
1789	} {
1790	usual
1791	ignore -borderwidth -highlightthickness
1792	}
1793	Rappture::Tooltip::for $itk_component(yCutScale) \
1794	"@[itcl::code $this SlicerTip y]"
1795	# Set the default cutplane value before disabling the scale.
1796	$itk_component(yCutScale) set 50
1797	$itk_component(yCutScale) configure -state disabled
1798
1799	# Z-value slicer...
1800	itk_component add zCutButton {
1801	Rappture::PushButton $inner.zbutton \
1802	-onimage [Rappture::icon z-cutplane] \
1803	-offimage [Rappture::icon z-cutplane] \
1804	-command [itcl::code $this AdjustSetting -zcutplanevisible] \
1805	-variable [itcl::scope _settings(-zcutplanevisible)]
1806	}
1807	Rappture::Tooltip::for $itk_component(zCutButton) \
1808	"Toggle the Z cut plane on/off"
1809	$itk_component(zCutButton) select
1810
1811	itk_component add zCutScale {
1812	::scale $inner.zval -from 100 -to 0 \
1813	-width 10 -orient vertical -showvalue off \
1814	-borderwidth 1 -highlightthickness 0 \
1815	-command [itcl::code $this Slice move z] \
1816	-variable [itcl::scope _settings(-zcutplaneposition)]
1817	} {
1818	usual
1819	ignore -borderwidth -highlightthickness
1820	}
1821	$itk_component(zCutScale) set 50
1822	$itk_component(zCutScale) configure -state disabled
1823	Rappture::Tooltip::for $itk_component(zCutScale) \
1824	"@[itcl::code $this SlicerTip z]"
1825
1826	blt::table $inner \
1827	0,1 $inner.visible -anchor w -pady 2 -cspan 4 \
1828	1,1 $itk_component(xCutScale) \
1829	1,2 $itk_component(yCutScale) \
1830	1,3 $itk_component(zCutScale) \
1831	2,1 $itk_component(xCutButton) \
1832	2,2 $itk_component(yCutButton) \
1833	2,3 $itk_component(zCutButton)
1834
1835	blt::table configure $inner r0 r1 r2 c* -resize none
1836	blt::table configure $inner r3 c4 -resize expand
1837	blt::table configure $inner c0 -width 2
1838	blt::table configure $inner c1 c2 c3 -padx 2
1839	}
1840
1841	itcl::body Rappture::NanovisViewer::BuildCameraTab {} {
1842	set inner [$itk_component(main) insert end \
1843	-title "Camera Settings" \
1844	-icon [Rappture::icon camera]]
1845	$inner configure -borderwidth 4
1846
1847	label $inner.view_l -text "view" -font "Arial 9"
1848	set f [frame $inner.view]
1849	foreach side { front back left right top bottom } {
1850	button $f.$side -image [Rappture::icon view$side] \
1851	-command [itcl::code $this SetOrientation $side]
1852	Rappture::Tooltip::for $f.$side "Change the view to $side"
1853	pack $f.$side -side left
1854	}
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 { qw qx qy qz xpan ypan zoom }
1863	foreach tag $labels {
1864	label $inner.${tag}label -text $tag -font "Arial 9"
1865	entry $inner.${tag} -font "Arial 9" -bg white \
1866	-textvariable [itcl::scope _settings(-$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
1878	blt::table configure $inner c* -resize none
1879	blt::table configure $inner c2 -resize expand
1880	blt::table configure $inner r$row -resize expand
1881	}
1882
1883	# ----------------------------------------------------------------------
1884	# USAGE: Slice move x\|y\|z <newval>
1885	#
1886	# Called automatically when the user drags the slider to move the
1887	# cut plane that slices 3D data. Gets the current value from the
1888	# slider and moves the cut plane to the appropriate point in the
1889	# data set.
1890	# ----------------------------------------------------------------------
1891	itcl::body Rappture::NanovisViewer::Slice {option args} {
1892	switch -- $option {
1893	move {
1894	if {[llength $args] != 2} {
1895	error "wrong # args: should be \"Slice move x\|y\|z newval\""
1896	}
1897	set axis [lindex $args 0]
1898	set newval [lindex $args 1]
1899
1900	set newpos [expr {0.01*$newval}]
1901	set datasets [CurrentDatasets -cutplanes]
1902	set tag [lindex $datasets 0]
1903	SendCmd "cutplane position $newpos $axis $tag"
1904	}
1905	default {
1906	error "bad option \"$option\": should be axis, move, or volume"
1907	}
1908	}
1909	}
1910
1911	# ----------------------------------------------------------------------
1912	# USAGE: SlicerTip <axis>
1913	#
1914	# Used internally to generate a tooltip for the x/y/z slicer controls.
1915	# Returns a message that includes the current slicer value.
1916	# ----------------------------------------------------------------------
1917	itcl::body Rappture::NanovisViewer::SlicerTip {axis} {
1918	set val [$itk_component(${axis}CutScale) get]
1919	return "Move the [string toupper $axis] cut plane.\nCurrently: $axis = $val%"
1920	}
1921
1922
1923	itcl::body Rappture::NanovisViewer::DoResize {} {
1924	$_arcball resize $_width $_height
1925	SendCmd "screen size $_width $_height"
1926	set _resizePending 0
1927	}
1928
1929	itcl::body Rappture::NanovisViewer::EventuallyResize { w h } {
1930	set _width $w
1931	set _height $h
1932	$_arcball resize $w $h
1933	if { !$_resizePending } {
1934	$_dispatcher event -idle !resize
1935	set _resizePending 1
1936	}
1937	}
1938
1939	itcl::body Rappture::NanovisViewer::EventuallyRedrawLegend {} {
1940	if { !$_resizeLegendPending } {
1941	$_dispatcher event -idle !legend
1942	set _resizeLegendPending 1
1943	}
1944	}
1945
1946	# camera --
1947	#
1948	itcl::body Rappture::NanovisViewer::camera {option args} {
1949	switch -- $option {
1950	"show" {
1951	puts [array get _view]
1952	}
1953	"set" {
1954	set what [lindex $args 0]
1955	set x $_settings($what)
1956	set code [catch { string is double $x } result]
1957	if { $code != 0 \|\| !$result } {
1958	set _settings($what) $_view($what)
1959	return
1960	}
1961	switch -- $what {
1962	"-xpan" - "-ypan" {
1963	set _view($what) $_settings($what)
1964	PanCamera
1965	}
1966	"-qx" - "-qy" - "-qz" - "-qw" {
1967	set _view($what) $_settings($what)
1968	set q [ViewToQuaternion]
1969	$_arcball quaternion $q
1970	SendCmd "camera orient $q"
1971	}
1972	"-zoom" {
1973	set _view($what) $_settings($what)
1974	SendCmd "camera zoom $_view($what)"
1975	}
1976	}
1977	}
1978	}
1979	}
1980
1981	itcl::body Rappture::NanovisViewer::GetVolumeInfo { w } {
1982	set flowobj ""
1983	foreach key [array names _obj2flow] {
1984	set flowobj $_obj2flow($key)
1985	break
1986	}
1987	if { $flowobj == "" } {
1988	return
1989	}
1990	if { [winfo exists $w.frame] } {
1991	destroy $w.frame
1992	}
1993	set inner [frame $w.frame]
1994	blt::table $w \
1995	5,0 $inner -fill both -cspan 2 -anchor nw
1996	array set hints [$dataobj hints]
1997
1998	label $inner.volumes -text "Volumes" -font "Arial 9 bold"
1999	blt::table $inner \
2000	1,0 $inner.volumes -anchor w \
2001	blt::table configure $inner c0 c1 -resize none
2002	blt::table configure $inner c2 -resize expand
2003
2004	set row 3
2005	set volumes [get]
2006	if { [llength $volumes] > 0 } {
2007	blt::table $inner $row,0 $inner.volumes -anchor w
2008	incr row
2009	}
2010	foreach vol $volumes {
2011	array unset info
2012	array set info $vol
2013	set name $info(name)
2014	if { ![info exists _settings(-volumevisible-$name)] } {
2015	set _settings(-volumevisible-$name) $info(hide)
2016	}
2017	checkbutton $inner.vol$row -text $info(label) \
2018	-variable [itcl::scope _settings(-volumevisible-$name)] \
2019	-onvalue 0 -offvalue 1 \
2020	-command [itcl::code $this ToggleVolume $key $name] \
2021	-font "Arial 9"
2022	Rappture::Tooltip::for $inner.vol$row $info(description)
2023	blt::table $inner $row,0 $inner.vol$row -anchor w
2024	if { !$_settings(-volume-$name) } {
2025	$inner.vol$row select
2026	}
2027	incr row
2028	}
2029	blt::table configure $inner r* -resize none
2030	blt::table configure $inner r$row -resize expand
2031	blt::table configure $inner c3 -resize expand
2032	event generate [winfo parent [winfo parent $w]] <Configure>
2033	}
2034
2035	itcl::body Rappture::NanovisViewer::ToggleVolume { tag name } {
2036	set bool $_settings(-volumevisible-$name)
2037	SendCmd "volume state $bool $name"
2038	}
2039
2040	itcl::body Rappture::NanovisViewer::SetOrientation { side } {
2041	array set positions {
2042	front "1 0 0 0"
2043	back "0 0 1 0"
2044	left "0.707107 0 -0.707107 0"
2045	right "0.707107 0 0.707107 0"
2046	top "0.707107 -0.707107 0 0"
2047	bottom "0.707107 0.707107 0 0"
2048	}
2049	foreach name { -qw -qx -qy -qz } value $positions($side) {
2050	set _view($name) $value
2051	}
2052	set q [ViewToQuaternion]
2053	$_arcball quaternion $q
2054	SendCmd "camera orient $q"
2055	SendCmd "camera reset"
2056	set _view(-xpan) 0
2057	set _view(-ypan) 0
2058	set _view(-zoom) 1.0
2059	set _settings(-xpan) $_view(-xpan)
2060	set _settings(-ypan) $_view(-ypan)
2061	set _settings(-zoom) $_view(-zoom)
2062	}
2063
2064
2065	#
2066	# InitComponentSettings --
2067	#
2068	# Initializes the volume settings for a specific component. This should
2069	# match what's used as global settings above. This is called the first
2070	# time we try to switch to a given component in SwitchComponent below.
2071	#
2072	itcl::body Rappture::NanovisViewer::InitComponentSettings { cname } {
2073	foreach {key value} {
2074	-colormap "default"
2075	-light 40
2076	-light2side 1
2077	-thickness 350
2078	-volumeopacity 1.0
2079	-volumevisible 1
2080	} {
2081	if { ![info exists _settings($cname${key})] } {
2082	# Don't override existing component settings
2083	set _settings($cname${key}) $value
2084	}
2085	}
2086	}
2087
2088	#
2089	# SwitchComponent --
2090	#
2091	# This is called when the current component is changed by the dropdown
2092	# menu in the volume tab. It synchronizes the global volume settings
2093	# with the settings of the new current component.
2094	#
2095	itcl::body Rappture::NanovisViewer::SwitchComponent { cname } {
2096	if { ![info exists _settings($cname-light)] } {
2097	InitComponentSettings $cname
2098	}
2099	if { $_settings(-colormap) != $_settings($cname-colormap) } {
2100	set _settings(-colormap) $_settings($cname-colormap)
2101	EventuallyRedrawLegend
2102	}
2103	# _settings variables change widgets, except for colormap
2104	set _settings(-light) $_settings($cname-light)
2105	set _settings(-light2side) $_settings($cname-light2side)
2106	set _settings(-volumeopacity) $_settings($cname-volumeopacity)
2107	set _settings(-thickness) $_settings($cname-thickness)
2108	set _settings(-volumevisible) $_settings($cname-volumevisible)
2109	$itk_component(colormap) value $_settings($cname-colormap)
2110
2111	set _widget(-volumeopacity) [expr $_settings(-volumeopacity) * 100.0]
2112
2113	set _current $cname; # Reset the current component
2114	}
2115
2116	#
2117	# BuildVolumeComponents --
2118	#
2119	# This is called from the "scale" method which is called when a new
2120	# dataset is added or deleted. It repopulates the dropdown menu of
2121	# volume component names. It sets the current component to the first
2122	# component in the list (of components found). Finally, if there is
2123	# only one component, don't display the label or the combobox in the
2124	# volume settings tab.
2125	#
2126	itcl::body Rappture::NanovisViewer::BuildVolumeComponents {} {
2127	$itk_component(volcomponents) choices delete 0 end
2128	foreach name $_componentsList {
2129	$itk_component(volcomponents) choices insert end $name $name
2130	}
2131	set _current [lindex $_componentsList 0]
2132	$itk_component(volcomponents) value $_current
2133	set parent [winfo parent $itk_component(volcomponents)]
2134	if { [llength $_componentsList] <= 1 } {
2135	# Unpack the components label and dropdown if there's only one
2136	# component.
2137	blt::table forget $parent.volcomponents_l $parent.volcomponents
2138	} else {
2139	# Pack the components label and dropdown into the table there's
2140	# more than one component to select.
2141	blt::table $parent \
2142	0,0 $parent.volcomponents_l -anchor e -cspan 2 \
2143	0,2 $parent.volcomponents -cspan 3 -fill x
2144	}
2145	}
2146
2147	#
2148	# GetDatasetsWithComponents --
2149	#
2150	# Returns a list of all the datasets (known by the combination of their
2151	# data object and component name) that match the given component name.
2152	# For example, this is used where we want to change the settings of
2153	# volumes that have the current component.
2154	#
2155	itcl::body Rappture::NanovisViewer::GetDatasetsWithComponent { cname } {
2156	if { ![info exists _volcomponents($cname)] } {
2157	return ""
2158	}
2159	set list ""
2160	foreach tag $_volcomponents($cname) {
2161	if { ![info exists _serverDatasets($tag)] } {
2162	continue
2163	}
2164	lappend list $tag
2165	}
2166	return $list
2167	}
2168
2169	#
2170	# HideAllMarkers --
2171	#
2172	# Hide all the markers in all the transfer functions. Can't simply
2173	# delete and recreate markers from the <style> since the user may have
2174	# created, deleted, or moved markers.
2175	#
2176	itcl::body Rappture::NanovisViewer::HideAllMarkers {} {
2177	foreach cname [array names _transferFunctionEditors] {
2178	$_transferFunctionEditors($cname) hideMarkers
2179	}
2180	}
2181
2182	itcl::body Rappture::NanovisViewer::GetColormap { cname color } {
2183	if { $color == "default" } {
2184	return $_cname2defaultcolormap($cname)
2185	}
2186	return [ColorsToColormap $color]
2187	}
2188
2189	itcl::body Rappture::NanovisViewer::ResetColormap { cname color } {
2190	# Get the current transfer function
2191	if { ![info exists _cname2transferFunction($cname)] } {
2192	return
2193	}
2194	foreach { cmap amap } $_cname2transferFunction($cname) break
2195	set cmap [GetColormap $cname $color]
2196	set _cname2transferFunction($cname) [list $cmap $amap]
2197	SendCmd [list transfunc define $cname $cmap $amap]
2198	EventuallyRedrawLegend
2199	}
2200
2201	itcl::body Rappture::NanovisViewer::ComputeAlphamap { cname } {
2202	if { ![info exists _transferFunctionEditors($cname)] } {
2203	return [list 0.0 0.0 1.0 1.0]
2204	}
2205	if { ![info exists _settings($cname-light)] } {
2206	InitComponentSettings $cname
2207	}
2208
2209	set isovalues [$_transferFunctionEditors($cname) values]
2210
2211	# Transfer function should be normalized with [0,1] range
2212	# The volume shading opacity setting is used to scale opacity
2213	# in the volume shader.
2214	set max 1.0
2215
2216	# Use the component-wise thickness setting from the slider
2217	# settings widget
2218	# Scale values between 0.00001 and 0.01000
2219	set delta [expr {double($_settings($cname-thickness)) * 0.0001}]
2220
2221	set first [lindex $isovalues 0]
2222	set last [lindex $isovalues end]
2223	set amap ""
2224	if { $first == "" \|\| $first != 0.0 } {
2225	lappend amap 0.0 0.0
2226	}
2227	foreach x $isovalues {
2228	set x1 [expr {$x-$delta-0.00001}]
2229	set x2 [expr {$x-$delta}]
2230	set x3 [expr {$x+$delta}]
2231	set x4 [expr {$x+$delta+0.00001}]
2232	if { $x1 < 0.0 } {
2233	set x1 0.0
2234	} elseif { $x1 > 1.0 } {
2235	set x1 1.0
2236	}
2237	if { $x2 < 0.0 } {
2238	set x2 0.0
2239	} elseif { $x2 > 1.0 } {
2240	set x2 1.0
2241	}
2242	if { $x3 < 0.0 } {
2243	set x3 0.0
2244	} elseif { $x3 > 1.0 } {
2245	set x3 1.0
2246	}
2247	if { $x4 < 0.0 } {
2248	set x4 0.0
2249	} elseif { $x4 > 1.0 } {
2250	set x4 1.0
2251	}
2252	# add spikes in the middle
2253	lappend amap $x1 0.0
2254	lappend amap $x2 $max
2255	lappend amap $x3 $max
2256	lappend amap $x4 0.0
2257	}
2258	if { $last == "" \|\| $last != 1.0 } {
2259	lappend amap 1.0 0.0
2260	}
2261	return $amap
2262	}
2263
2264	itcl::body Rappture::NanovisViewer::SetObjectStyle { dataobj cname } {
2265	array set style {
2266	-opacity 0.5
2267	}
2268	array set style [lindex [$dataobj components -style $cname] 0]
2269	# Some tools erroneously set -opacity to 1 in style, so
2270	# override the requested opacity for now
2271	set style(-opacity) 0.5
2272	set _settings($cname-volumeopacity) $style(-opacity)
2273	set tag $dataobj-$cname
2274	SendCmd "volume shading opacity $_settings($cname-volumeopacity) $tag"
2275	NameTransferFunction $dataobj $cname
2276	}

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