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source: trunk/gui/scripts/nanovisviewer.tcl @ 3330

Last change on this file since 3330 was 3330, checked in by gah, 12 years ago
merge (by hand) with Rappture1.2 branch
File size: 72.3 KB

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1	# -- mode: tcl; indent-tabs-mode: nil --
2
3	# ----------------------------------------------------------------------
4	# COMPONENT: nanovisviewer - 3D volume rendering
5	#
6	# This widget performs volume rendering on 3D scalar/vector datasets.
7	# It connects to the Nanovis server running on a rendering farm,
8	# transmits data, and displays the results.
9	# ======================================================================
10	# AUTHOR: Michael McLennan, Purdue University
11	# Copyright (c) 2004-2012 HUBzero Foundation, LLC
12	#
13	# See the file "license.terms" for information on usage and
14	# redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES.
15	# ======================================================================
16	package require Itk
17	package require BLT
18	package require Img
19
20	#
21	# FIXME:
22	# Need to Add DX readers this client to examine the data before
23	# it's sent to the server. This will eliminate 90% of the insanity in
24	# computing the limits of all the volumes. I can rip out all the
25	# "receive data" "send transfer function" event crap.
26	#
27	# This means we can compute the transfer function (relative values) and
28	# draw the legend min/max values without waiting for the information to
29	# come from the server. This will also prevent the flashing that occurs
30	# when a new volume is drawn (using the default transfer function) and
31	# then when the correct transfer function has been sent and linked to
32	# the volume.
33	#
34	option add *NanovisViewer.width 4i widgetDefault
35	option add NanovisViewercursor crosshair widgetDefault
36	option add *NanovisViewer.height 4i widgetDefault
37	option add *NanovisViewer.foreground black widgetDefault
38	option add *NanovisViewer.controlBackground gray widgetDefault
39	option add *NanovisViewer.controlDarkBackground #999999 widgetDefault
40	option add *NanovisViewer.plotBackground black widgetDefault
41	option add *NanovisViewer.plotForeground white widgetDefault
42	option add *NanovisViewer.plotOutline gray widgetDefault
43	option add *NanovisViewer.font \
44	--helvetica-medium-r-normal--12-* widgetDefault
45
46	# must use this name -- plugs into Rappture::resources::load
47	proc NanovisViewer_init_resources {} {
48	Rappture::resources::register \
49	nanovis_server Rappture::NanovisViewer::SetServerList
50	}
51
52	itcl::class Rappture::NanovisViewer {
53	inherit Rappture::VisViewer
54
55	itk_option define -plotforeground plotForeground Foreground ""
56	itk_option define -plotbackground plotBackground Background ""
57	itk_option define -plotoutline plotOutline PlotOutline ""
58
59	constructor { hostlist args } {
60	Rappture::VisViewer::constructor $hostlist
61	} {
62	# defined below
63	}
64	destructor {
65	# defined below
66	}
67	public proc SetServerList { namelist } {
68	Rappture::VisViewer::SetServerList "nanovis" $namelist
69	}
70	public method add {dataobj {settings ""}}
71	public method camera {option args}
72	public method delete {args}
73	public method disconnect {}
74	public method download {option args}
75	public method get {args}
76	public method isconnected {}
77	public method limits { tf }
78	public method overmarker { m x }
79	public method sendto { string }
80	public method parameters {title args} {
81	# do nothing
82	}
83	public method rmdupmarker { m x }
84	public method scale {args}
85	public method updatetransferfuncs {}
86
87	protected method Connect {}
88	protected method CurrentVolumes {{what -all}}
89	protected method Disconnect {}
90	protected method DoResize {}
91	protected method FixLegend {}
92	protected method FixSettings {what {value ""}}
93	protected method Pan {option x y}
94	protected method Rebuild {}
95	protected method ReceiveData { args }
96	protected method ReceiveImage { args }
97	protected method ReceiveLegend { tf vmin vmax size }
98	protected method Rotate {option x y}
99	protected method SendCmd {string}
100	protected method SendTransferFuncs {}
101	protected method Slice {option args}
102	protected method SlicerTip {axis}
103	protected method Zoom {option}
104
105	# The following methods are only used by this class.
106	private method AddIsoMarker { x y }
107	private method BuildCameraTab {}
108	private method BuildCutplanesTab {}
109	private method BuildViewTab {}
110	private method BuildVolumeTab {}
111	private method ComputeTransferFunc { tf }
112	private method EventuallyResize { w h }
113	private method EventuallyResizeLegend { }
114	private method NameTransferFunc { dataobj comp }
115	private method PanCamera {}
116	private method ParseLevelsOption { tf levels }
117	private method ParseMarkersOption { tf markers }
118	private method volume { tag name }
119	private method GetVolumeInfo { w }
120	private method SetOrientation {}
121
122	private variable _outbuf ;# buffer for outgoing commands
123
124	private variable _dlist "" ;# list of data objects
125	private variable _allDataObjs
126	private variable _obj2ovride ;# maps dataobj => style override
127	private variable _serverVols ;# contains all the dataobj-component
128	;# to volumes in the server
129	private variable _serverTfs ;# contains all the transfer functions
130	;# in the server.
131	private variable _recvdVols ;# list of data objs to send to server
132	private variable _vol2style ;# maps dataobj-component to transfunc
133	private variable _style2vols ;# maps tf back to list of
134	# dataobj-components using the tf.
135
136	private variable _reset 1; # Connection to server has been reset
137	private variable _click ;# info used for rotate operations
138	private variable _limits ;# autoscale min/max for all axes
139	private variable _view ;# view params for 3D view
140	private variable _isomarkers ;# array of isosurface level values 0..1
141	private common _settings
142	# Array of transfer functions in server. If 0 the transfer has been
143	# defined but not loaded. If 1 the transfer function has been named
144	# and loaded.
145	private variable _activeTfs
146	private variable _first "" ;# This is the topmost volume.
147	private variable _buffering 0
148
149	# This
150	# indicates which isomarkers and transfer
151	# function to use when changing markers,
152	# opacity, or thickness.
153	common _downloadPopup ;# download options from popup
154	private common _hardcopy
155	private variable _width 0
156	private variable _height 0
157	private variable _resizePending 0
158	private variable _resizeLegendPending 0
159	}
160
161	itk::usual NanovisViewer {
162	keep -background -foreground -cursor -font
163	keep -plotbackground -plotforeground
164	}
165
166	# ----------------------------------------------------------------------
167	# CONSTRUCTOR
168	# ----------------------------------------------------------------------
169	itcl::body Rappture::NanovisViewer::constructor {hostlist args} {
170	set _serverType "nanovis"
171
172	# Draw legend event
173	$_dispatcher register !legend
174	$_dispatcher dispatch $this !legend "[itcl::code $this FixLegend]; list"
175
176	# Send transfer functions event
177	$_dispatcher register !send_transfunc
178	$_dispatcher dispatch $this !send_transfunc \
179	"[itcl::code $this SendTransferFuncs]; list"
180
181	# Rebuild event
182	$_dispatcher register !rebuild
183	$_dispatcher dispatch $this !rebuild "[itcl::code $this Rebuild]; list"
184
185	# Resize event
186	$_dispatcher register !resize
187	$_dispatcher dispatch $this !resize "[itcl::code $this DoResize]; list"
188
189	set _outbuf ""
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	$_parser alias viserror [itcl::code $this ReceiveError]
198
199	# Initialize the view to some default parameters.
200	array set _view {
201	theta 45
202	phi 45
203	psi 0
204	zoom 1.0
205	pan-x 0
206	pan-y 0
207	}
208	set _limits(vmin) 0.0
209	set _limits(vmax) 1.0
210	set _reset 1
211
212	array set _settings [subst {
213	$this-pan-x $_view(pan-x)
214	$this-pan-y $_view(pan-y)
215	$this-phi $_view(phi)
216	$this-psi $_view(psi)
217	$this-theta $_view(theta)
218	$this-volume 1
219	$this-xcutplane 0
220	$this-xcutposition 0
221	$this-ycutplane 0
222	$this-ycutposition 0
223	$this-zcutplane 0
224	$this-zcutposition 0
225	$this-zoom $_view(zoom)
226	}]
227
228	itk_component add 3dview {
229	label $itk_component(plotarea).view -image $_image(plot) \
230	-highlightthickness 0 -borderwidth 0
231	} {
232	usual
233	ignore -highlightthickness -borderwidth -background
234	}
235	bind $itk_component(3dview) <Control-F1> [itcl::code $this ToggleConsole]
236
237	set f [$itk_component(main) component controls]
238	itk_component add reset {
239	button $f.reset -borderwidth 1 -padx 1 -pady 1 \
240	-highlightthickness 0 \
241	-image [Rappture::icon reset-view] \
242	-command [itcl::code $this Zoom reset]
243	} {
244	usual
245	ignore -highlightthickness
246	}
247	pack $itk_component(reset) -side top -padx 2 -pady 2
248	Rappture::Tooltip::for $itk_component(reset) "Reset the view to the default zoom level"
249
250	itk_component add zoomin {
251	button $f.zin -borderwidth 1 -padx 1 -pady 1 \
252	-highlightthickness 0 \
253	-image [Rappture::icon zoom-in] \
254	-command [itcl::code $this Zoom in]
255	} {
256	usual
257	ignore -highlightthickness
258	}
259	pack $itk_component(zoomin) -side top -padx 2 -pady 2
260	Rappture::Tooltip::for $itk_component(zoomin) "Zoom in"
261
262	itk_component add zoomout {
263	button $f.zout -borderwidth 1 -padx 1 -pady 1 \
264	-highlightthickness 0 \
265	-image [Rappture::icon zoom-out] \
266	-command [itcl::code $this Zoom out]
267	} {
268	usual
269	ignore -highlightthickness
270	}
271	pack $itk_component(zoomout) -side top -padx 2 -pady 2
272	Rappture::Tooltip::for $itk_component(zoomout) "Zoom out"
273
274	itk_component add volume {
275	Rappture::PushButton $f.volume \
276	-onimage [Rappture::icon volume-on] \
277	-offimage [Rappture::icon volume-off] \
278	-command [itcl::code $this FixSettings volume] \
279	-variable [itcl::scope _settings($this-volume)]
280	}
281	$itk_component(volume) select
282	Rappture::Tooltip::for $itk_component(volume) \
283	"Toggle the volume cloud on/off"
284	pack $itk_component(volume) -padx 2 -pady 2
285
286	BuildViewTab
287	BuildVolumeTab
288	BuildCutplanesTab
289	BuildCameraTab
290
291	# Legend
292
293	set _image(legend) [image create photo]
294	itk_component add legend {
295	canvas $itk_component(plotarea).legend -height 50 -highlightthickness 0
296	} {
297	usual
298	ignore -highlightthickness
299	rename -background -plotbackground plotBackground Background
300	}
301	bind $itk_component(legend) <Configure> \
302	[itcl::code $this EventuallyResizeLegend]
303
304	# Hack around the Tk panewindow. The problem is that the requested
305	# size of the 3d view isn't set until an image is retrieved from
306	# the server. So the panewindow uses the tiny size.
307	set w 10000
308	pack forget $itk_component(3dview)
309	blt::table $itk_component(plotarea) \
310	0,0 $itk_component(3dview) -fill both -reqwidth $w \
311	1,0 $itk_component(legend) -fill x
312	blt::table configure $itk_component(plotarea) r1 -resize none
313
314	# Bindings for rotation via mouse
315	bind $itk_component(3dview) <ButtonPress-1> \
316	[itcl::code $this Rotate click %x %y]
317	bind $itk_component(3dview) <B1-Motion> \
318	[itcl::code $this Rotate drag %x %y]
319	bind $itk_component(3dview) <ButtonRelease-1> \
320	[itcl::code $this Rotate release %x %y]
321	bind $itk_component(3dview) <Configure> \
322	[itcl::code $this EventuallyResize %w %h]
323
324	# Bindings for panning via mouse
325	bind $itk_component(3dview) <ButtonPress-2> \
326	[itcl::code $this Pan click %x %y]
327	bind $itk_component(3dview) <B2-Motion> \
328	[itcl::code $this Pan drag %x %y]
329	bind $itk_component(3dview) <ButtonRelease-2> \
330	[itcl::code $this Pan release %x %y]
331
332	# Bindings for panning via keyboard
333	bind $itk_component(3dview) <KeyPress-Left> \
334	[itcl::code $this Pan set -10 0]
335	bind $itk_component(3dview) <KeyPress-Right> \
336	[itcl::code $this Pan set 10 0]
337	bind $itk_component(3dview) <KeyPress-Up> \
338	[itcl::code $this Pan set 0 -10]
339	bind $itk_component(3dview) <KeyPress-Down> \
340	[itcl::code $this Pan set 0 10]
341	bind $itk_component(3dview) <Shift-KeyPress-Left> \
342	[itcl::code $this Pan set -2 0]
343	bind $itk_component(3dview) <Shift-KeyPress-Right> \
344	[itcl::code $this Pan set 2 0]
345	bind $itk_component(3dview) <Shift-KeyPress-Up> \
346	[itcl::code $this Pan set 0 -2]
347	bind $itk_component(3dview) <Shift-KeyPress-Down> \
348	[itcl::code $this Pan set 0 2]
349
350	# Bindings for zoom via keyboard
351	bind $itk_component(3dview) <KeyPress-Prior> \
352	[itcl::code $this Zoom out]
353	bind $itk_component(3dview) <KeyPress-Next> \
354	[itcl::code $this Zoom in]
355
356	bind $itk_component(3dview) <Enter> "focus $itk_component(3dview)"
357
358	if {[string equal "x11" [tk windowingsystem]]} {
359	# Bindings for zoom via mouse
360	bind $itk_component(3dview) <4> [itcl::code $this Zoom out]
361	bind $itk_component(3dview) <5> [itcl::code $this Zoom in]
362	}
363
364	set _image(download) [image create photo]
365
366	eval itk_initialize $args
367
368	Connect
369	}
370
371	# ----------------------------------------------------------------------
372	# DESTRUCTOR
373	# ----------------------------------------------------------------------
374	itcl::body Rappture::NanovisViewer::destructor {} {
375	$_dispatcher cancel !rebuild
376	$_dispatcher cancel !send_transfunc
377	$_dispatcher cancel !resize
378	image delete $_image(plot)
379	image delete $_image(legend)
380	image delete $_image(download)
381	array unset _settings $this-*
382	}
383
384	# ----------------------------------------------------------------------
385	# USAGE: add <dataobj> ?<settings>?
386	#
387	# Clients use this to add a data object to the plot. The optional
388	# <settings> are used to configure the plot. Allowed settings are
389	# -color, -brightness, -width, -linestyle, and -raise.
390	# ----------------------------------------------------------------------
391	itcl::body Rappture::NanovisViewer::add {dataobj {settings ""}} {
392	array set params {
393	-color auto
394	-width 1
395	-linestyle solid
396	-brightness 0
397	-raise 0
398	-description ""
399	-param ""
400	}
401	foreach {opt val} $settings {
402	if {![info exists params($opt)]} {
403	error "bad setting \"$opt\": should be [join [lsort [array names params]] {, }]"
404	}
405	set params($opt) $val
406	}
407	if {$params(-color) == "auto" \|\| $params(-color) == "autoreset"} {
408	# can't handle -autocolors yet
409	set params(-color) black
410	}
411	set pos [lsearch -exact $dataobj $_dlist]
412	if {$pos < 0} {
413	lappend _dlist $dataobj
414	set _allDataObjs($dataobj) 1
415	set _obj2ovride($dataobj-color) $params(-color)
416	set _obj2ovride($dataobj-width) $params(-width)
417	set _obj2ovride($dataobj-raise) $params(-raise)
418	$_dispatcher event -idle !rebuild
419	}
420	}
421
422	# ----------------------------------------------------------------------
423	# USAGE: get ?-objects?
424	# USAGE: get ?-image 3dview\|legend?
425	#
426	# Clients use this to query the list of objects being plotted, in
427	# order from bottom to top of this result. The optional "-image"
428	# flag can also request the internal images being shown.
429	# ----------------------------------------------------------------------
430	itcl::body Rappture::NanovisViewer::get {args} {
431	if {[llength $args] == 0} {
432	set args "-objects"
433	}
434
435	set op [lindex $args 0]
436	switch -- $op {
437	-objects {
438	# put the dataobj list in order according to -raise options
439	set dlist $_dlist
440	foreach obj $dlist {
441	if {[info exists _obj2ovride($obj-raise)] && $_obj2ovride($obj-raise)} {
442	set i [lsearch -exact $dlist $obj]
443	if {$i >= 0} {
444	set dlist [lreplace $dlist $i $i]
445	lappend dlist $obj
446	}
447	}
448	}
449	return $dlist
450	}
451	-image {
452	if {[llength $args] != 2} {
453	error "wrong # args: should be \"get -image 3dview\|legend\""
454	}
455	switch -- [lindex $args end] {
456	3dview {
457	return $_image(plot)
458	}
459	legend {
460	return $_image(legend)
461	}
462	default {
463	error "bad image name \"[lindex $args end]\": should be 3dview or legend"
464	}
465	}
466	}
467	default {
468	error "bad option \"$op\": should be -objects or -image"
469	}
470	}
471	}
472
473	# ----------------------------------------------------------------------
474	# USAGE: delete ?<dataobj1> <dataobj2> ...?
475	#
476	# Clients use this to delete a dataobj from the plot. If no dataobjs
477	# are specified, then all dataobjs are deleted. No data objects are
478	# deleted. They are only removed from the display list.
479	#
480	# ----------------------------------------------------------------------
481	itcl::body Rappture::NanovisViewer::delete {args} {
482	if {[llength $args] == 0} {
483	set args $_dlist
484	}
485	# Delete all specified dataobjs
486	set changed 0
487	foreach dataobj $args {
488	set pos [lsearch -exact $_dlist $dataobj]
489	if { $pos >= 0 } {
490	set _dlist [lreplace $_dlist $pos $pos]
491	array unset _limits $dataobj*
492	array unset _obj2ovride $dataobj-*
493	array unset _vol2style $dataobj-*
494	set changed 1
495	}
496	}
497	# If anything changed, then rebuild the plot
498	if {$changed} {
499	$_dispatcher event -idle !rebuild
500	}
501	}
502
503	# ----------------------------------------------------------------------
504	# USAGE: scale ?<data1> <data2> ...?
505	#
506	# Sets the default limits for the overall plot according to the
507	# limits of the data for all of the given <data> objects. This
508	# accounts for all objects--even those not showing on the screen.
509	# Because of this, the limits are appropriate for all objects as
510	# the user scans through data in the ResultSet viewer.
511	# ----------------------------------------------------------------------
512	itcl::body Rappture::NanovisViewer::scale {args} {
513	foreach val {xmin xmax ymin ymax zmin zmax vmin vmax} {
514	set _limits($val) ""
515	}
516	foreach obj $args {
517	foreach axis {x y z v} {
518
519	foreach { min max } [$obj limits $axis] break
520
521	if {"" != $min && "" != $max} {
522	if {"" == $_limits(${axis}min)} {
523	set _limits(${axis}min) $min
524	set _limits(${axis}max) $max
525	} else {
526	if {$min < $_limits(${axis}min)} {
527	set _limits(${axis}min) $min
528	}
529	if {$max > $_limits(${axis}max)} {
530	set _limits(${axis}max) $max
531	}
532	}
533	}
534	}
535	}
536	}
537
538	# ----------------------------------------------------------------------
539	# USAGE: download coming
540	# USAGE: download controls <downloadCommand>
541	# USAGE: download now
542	#
543	# Clients use this method to create a downloadable representation
544	# of the plot. Returns a list of the form {ext string}, where
545	# "ext" is the file extension (indicating the type of data) and
546	# "string" is the data itself.
547	# ----------------------------------------------------------------------
548	itcl::body Rappture::NanovisViewer::download {option args} {
549	switch $option {
550	coming {
551	if {[catch {
552	blt::winop snap $itk_component(plotarea) $_image(download)
553	}]} {
554	$_image(download) configure -width 1 -height 1
555	$_image(download) put #000000
556	}
557	}
558	controls {
559	# no controls for this download yet
560	return ""
561	}
562	now {
563	# Get the image data (as base64) and decode it back to binary.
564	# This is better than writing to temporary files. When we switch
565	# to the BLT picture image it won't be necessary to decode the
566	# image data.
567	if { [image width $_image(plot)] > 0 &&
568	[image height $_image(plot)] > 0 } {
569	set bytes [$_image(plot) data -format "jpeg -quality 100"]
570	set bytes [Rappture::encoding::decode -as b64 $bytes]
571	return [list .jpg $bytes]
572	}
573	return ""
574	}
575	default {
576	error "bad option \"$option\": should be coming, controls, now"
577	}
578	}
579	}
580
581	# ----------------------------------------------------------------------
582	# USAGE: Connect ?<host:port>,<host:port>...?
583	#
584	# Clients use this method to establish a connection to a new
585	# server, or to reestablish a connection to the previous server.
586	# Any existing connection is automatically closed.
587	# ----------------------------------------------------------------------
588	itcl::body Rappture::NanovisViewer::Connect {} {
589	set _hosts [GetServerList "nanovis"]
590	if { "" == $_hosts } {
591	return 0
592	}
593	set _reset 1
594	set result [VisViewer::Connect $_hosts]
595	if { $result } {
596	set w [winfo width $itk_component(3dview)]
597	set h [winfo height $itk_component(3dview)]
598	EventuallyResize $w $h
599	}
600	return $result
601	}
602
603	#
604	# isconnected --
605	#
606	# Indicates if we are currently connected to the visualization server.
607	#
608	itcl::body Rappture::NanovisViewer::isconnected {} {
609	return [VisViewer::IsConnected]
610	}
611
612	#
613	# disconnect --
614	#
615	itcl::body Rappture::NanovisViewer::disconnect {} {
616	Disconnect
617	}
618
619	#
620	# Disconnect --
621	#
622	# Clients use this method to disconnect from the current rendering
623	# server.
624	#
625	itcl::body Rappture::NanovisViewer::Disconnect {} {
626	VisViewer::Disconnect
627
628	# disconnected -- no more data sitting on server
629	set _outbuf ""
630	array unset _serverVols
631	}
632
633	#
634	# sendto --
635	#
636	itcl::body Rappture::NanovisViewer::sendto { bytes } {
637	SendBytes "$bytes\n"
638	}
639
640	#
641	# SendCmd
642	#
643	# Send commands off to the rendering server. If we're currently
644	# sending data objects to the server, buffer the commands to be
645	# sent later.
646	#
647	itcl::body Rappture::NanovisViewer::SendCmd {string} {
648	if { $_buffering } {
649	append _outbuf $string "\n"
650	} else {
651	foreach line [split $string \n] {
652	SendEcho >>line $line
653	}
654	SendBytes "$string\n"
655	}
656	}
657
658
659	# ----------------------------------------------------------------------
660	# USAGE: SendTransferFuncs
661	# ----------------------------------------------------------------------
662	itcl::body Rappture::NanovisViewer::SendTransferFuncs {} {
663	if { $_first == "" } {
664	puts stderr "first not set"
665	return
666	}
667	# Ensure that the global opacity and thickness settings (in the slider
668	# settings widgets) are used for the active transfer-function. Update
669	# the values in the _settings varible.
670	set opacity [expr { double($_settings($this-opacity)) * 0.01 }]
671	# Scale values between 0.00001 and 0.01000
672	set thickness [expr {double($_settings($this-thickness)) * 0.0001}]
673
674	foreach vol [CurrentVolumes] {
675	if { ![info exists _serverVols($vol)] \|\| !$_serverVols($vol) } {
676	# The volume hasn't reached the server yet. How did we get
677	# here?
678	continue
679	}
680	if { ![info exists _vol2style($vol)] } {
681	puts stderr "unknown volume $vol"
682	continue; # How does this happen?
683	}
684	set tf $_vol2style($vol)
685	set _settings($this-$tf-opacity) $opacity
686	set _settings($this-$tf-thickness) $thickness
687	ComputeTransferFunc $tf
688	# FIXME: Need to the send information as to what transfer functions
689	# to update so that we only update the transfer function
690	# as necessary. Right now, all transfer functions are
691	# updated. This makes moving the isomarker slider chunky.
692	if { ![info exists _activeTfs($tf)] \|\| !$_activeTfs($tf) } {
693	set _activeTfs($tf) 1
694	}
695	SendCmd "volume shading transfunc $tf $vol"
696	}
697	FixLegend
698	}
699
700	# ----------------------------------------------------------------------
701	# USAGE: ReceiveImage -bytes <size> -type <type> -token <token>
702	#
703	# Invoked automatically whenever the "image" command comes in from
704	# the rendering server. Indicates that binary image data with the
705	# specified <size> will follow.
706	# ----------------------------------------------------------------------
707	itcl::body Rappture::NanovisViewer::ReceiveImage { args } {
708	array set info {
709	-token "???"
710	-bytes 0
711	-type image
712	}
713	array set info $args
714	set bytes [ReceiveBytes $info(-bytes)]
715	ReceiveEcho <<line "<read $info(-bytes) bytes"
716	if { $info(-type) == "image" } {
717	ReceiveEcho "for [image width $_image(plot)]x[image height $_image(plot)] image>"
718	$_image(plot) configure -data $bytes
719	} elseif { $info(type) == "print" } {
720	set tag $this-print-$info(-token)
721	set _hardcopy($tag) $bytes
722	}
723	}
724
725	#
726	# ReceiveLegend --
727	#
728	# The procedure is the response from the render server to each "legend"
729	# command. The server sends back a "legend" command invoked our
730	# the slave interpreter. The purpose is to collect data of the image
731	# representing the legend in the canvas. In addition, the isomarkers
732	# of the active transfer function are displayed.
733	#
734	# I don't know is this is the right place to display the isomarkers.
735	# I don't know all the different paths used to draw the plot. There's
736	# "Rebuild", "add", etc.
737	#
738	itcl::body Rappture::NanovisViewer::ReceiveLegend { tf vmin vmax size } {
739	if { ![isconnected] } {
740	return
741	}
742	set bytes [ReceiveBytes $size]
743	$_image(legend) configure -data $bytes
744	ReceiveEcho <<line "<read $size bytes for [image width $_image(legend)]x[image height $_image(legend)] legend>"
745
746	set c $itk_component(legend)
747	set w [winfo width $c]
748	set h [winfo height $c]
749	set lx 10
750	set ly [expr {$h - 1}]
751	if {"" == [$c find withtag transfunc]} {
752	$c create image 10 10 -anchor nw \
753	-image $_image(legend) -tags transfunc
754	$c create text $lx $ly -anchor sw \
755	-fill $itk_option(-plotforeground) -tags "limits vmin"
756	$c create text [expr {$w-$lx}] $ly -anchor se \
757	-fill $itk_option(-plotforeground) -tags "limits vmax"
758	$c lower transfunc
759	$c bind transfunc <ButtonRelease-1> \
760	[itcl::code $this AddIsoMarker %x %y]
761	}
762	# Display the markers used by the active transfer function.
763
764	array set limits [limits $tf]
765	$c itemconfigure vmin -text [format %.2g $limits(min)]
766	$c coords vmin $lx $ly
767
768	$c itemconfigure vmax -text [format %.2g $limits(max)]
769	$c coords vmax [expr {$w-$lx}] $ly
770
771	if { [info exists _isomarkers($tf)] } {
772	foreach m $_isomarkers($tf) {
773	$m visible yes
774	}
775	}
776
777	# The colormap may have changed. Resync the slicers with the colormap.
778	set vols [CurrentVolumes -cutplanes]
779	SendCmd "volume data state $_settings($this-volume) $vols"
780
781	# Adjust the cutplane for only the first component in the topmost volume
782	# (i.e. the first volume designated in the field).
783	set vol [lindex $vols 0]
784	foreach axis {x y z} {
785	# Turn off cutplanes for all volumes
786	SendCmd "cutplane state 0 $axis"
787	if { $_settings($this-${axis}cutplane) } {
788	# Turn on cutplane for this particular volume and set the position
789	SendCmd "cutplane state 1 $axis $vol"
790	set pos [expr {0.01*$_settings($this-${axis}cutposition)}]
791	SendCmd "cutplane position $pos $axis $vol"
792	}
793	}
794	}
795
796	#
797	# ReceiveData --
798	#
799	# The procedure is the response from the render server to each "data
800	# follows" command. The server sends back a "data" command invoked our
801	# the slave interpreter. The purpose is to collect the min/max of the
802	# volume sent to the render server. Since the client (nanovisviewer)
803	# doesn't parse 3D data formats, we rely on the server (nanovis) to
804	# tell us what the limits are. Once we've received the limits to all
805	# the data we've sent (tracked by _recvdVols) we can then determine
806	# what the transfer functions are for these volumes.
807	#
808	#
809	# Note: There is a considerable tradeoff in having the server report
810	# back what the data limits are. It means that much of the code
811	# having to do with transfer-functions has to wait for the data
812	# to come back, since the isomarkers are calculated based upon
813	# the data limits. The client code is much messier because of
814	# this. The alternative is to parse any of the 3D formats on the
815	# client side.
816	#
817	itcl::body Rappture::NanovisViewer::ReceiveData { args } {
818	if { ![isconnected] } {
819	return
820	}
821	# Arguments from server are name value pairs. Stuff them in an array.
822	array set info $args
823
824	set tag $info(tag)
825	set parts [split $tag -]
826
827	#
828	# Volumes don't exist until we're told about them.
829	#
830	set dataobj [lindex $parts 0]
831	set _serverVols($tag) 1
832	if { $_settings($this-volume) && $dataobj == $_first } {
833	SendCmd "volume state 1 $tag"
834	}
835	set _limits($tag-min) $info(min); # Minimum value of the volume.
836	set _limits($tag-max) $info(max); # Maximum value of the volume.
837	set _limits(vmin) $info(vmin); # Overall minimum value.
838	set _limits(vmax) $info(vmax); # Overall maximum value.
839
840	unset _recvdVols($tag)
841	if { [array size _recvdVols] == 0 } {
842	# The active transfer function is by default the first component of
843	# the first data object. This assumes that the data is always
844	# successfully transferred.
845	updatetransferfuncs
846	}
847	}
848
849	# ----------------------------------------------------------------------
850	# USAGE: Rebuild
851	#
852	# Called automatically whenever something changes that affects the
853	# data in the widget. Clears any existing data and rebuilds the
854	# widget to display new data.
855	# ----------------------------------------------------------------------
856	itcl::body Rappture::NanovisViewer::Rebuild {} {
857
858	# Turn on buffering of commands to the server. We don't want to
859	# be preempted by a server disconnect/reconnect (which automatically
860	# generates a new call to Rebuild).
861	set _buffering 1
862
863	# Hide all the isomarkers. Can't remove them. Have to remember the
864	# settings since the user may have created/deleted/moved markers.
865
866	foreach tf [array names _isomarkers] {
867	foreach m $_isomarkers($tf) {
868	$m visible no
869	}
870	}
871
872	set w [winfo width $itk_component(3dview)]
873	set h [winfo height $itk_component(3dview)]
874	EventuallyResize $w $h
875
876	foreach dataobj [get] {
877	foreach comp [$dataobj components] {
878	set vol $dataobj-$comp
879	if { ![info exists _serverVols($vol)] } {
880	# Send the data as one huge base64-encoded mess -- yuck!
881	set data [$dataobj values $comp]
882	set nbytes [string length $data]
883	append _outbuf "volume data follows $nbytes $vol\n"
884	append _outbuf $data
885	set _recvdVols($vol) 1
886	set _serverVols($vol) 0
887	}
888	NameTransferFunc $dataobj $comp
889	}
890	}
891	if { $_reset } {
892	#
893	# Reset the camera and other view parameters
894	#
895
896	set _settings($this-theta) $_view(theta)
897	set _settings($this-phi) $_view(phi)
898	set _settings($this-psi) $_view(psi)
899	set _settings($this-pan-x) $_view(pan-x)
900	set _settings($this-pan-y) $_view(pan-y)
901	set _settings($this-zoom) $_view(zoom)
902
903	set xyz [Euler2XYZ $_view(theta) $_view(phi) $_view(psi)]
904	SendCmd "camera angle $xyz"
905	PanCamera
906	SendCmd "camera zoom $_view(zoom)"
907	FixSettings light
908	FixSettings transp
909	FixSettings isosurface
910	FixSettings grid
911	FixSettings axes
912	FixSettings outline
913
914	# nothing to send -- activate the proper ivol
915	SendCmd "volume state 0"
916	set _first [lindex [get] 0]
917	if {"" != $_first} {
918	set axis [$_first hints updir]
919	if { "" != $axis } {
920	SendCmd "up $axis"
921	}
922	set location [$_first hints camera]
923	if { $location != "" } {
924	array set _view $location
925	}
926	set vols [array names _serverVols $_first-*]
927	if { $vols != "" } {
928	SendCmd "volume state 1 $vols"
929	}
930	if 1 {
931	# Tell the server the name of the tool, the version, and dataset
932	# that we are rendering. Have to do it here because we don't know
933	# what data objects are using the renderer until be get here.
934	global env
935
936	lappend out "hub" [exec hostname]
937	lappend out "viewer" "nanovisviewer"
938	if { [info exists env(USER)] } {
939	lappend out "user" $env(USER)
940	}
941	if { [info exists env(SESSION)] } {
942	lappend out "session" $env(SESSION)
943	}
944	lappend out "tool_id" [$_first hints toolId]
945	lappend out "tool_name" [$_first hints toolName]
946	lappend out "tool_version" [$_first hints toolRevision]
947	lappend out "tool_title" [$_first hints toolTitle]
948	lappend out "tool_dataset" [$_first hints label]
949	SendCmd "clientinfo [list $out]"
950	}
951
952	foreach axis {x y z} {
953	# Turn off cutplanes for all volumes
954	SendCmd "cutplane state 0 $axis"
955	}
956
957	# If the first volume already exists on the server, then make sure
958	# we display the proper transfer function in the legend.
959	set comp [lindex [$_first components] 0]
960	if { [info exists _serverVols($_first-$comp)] } {
961	updatetransferfuncs
962	}
963	}
964	}
965	set _buffering 0; # Turn off buffering.
966	# Actually write the commands to the server socket. If it fails, we don't
967	# care. We're finished here.
968	blt::busy hold $itk_component(hull)
969	SendBytes $_outbuf;
970	blt::busy release $itk_component(hull)
971	set _reset 0
972	set _outbuf ""; # Clear the buffer.
973	}
974
975	# ----------------------------------------------------------------------
976	# USAGE: CurrentVolumes ?-cutplanes?
977	#
978	# Returns a list of volume server IDs for the current volume being
979	# displayed. This is normally a single ID, but it might be a list
980	# of IDs if the current data object has multiple components.
981	# ----------------------------------------------------------------------
982	itcl::body Rappture::NanovisViewer::CurrentVolumes {{what -all}} {
983	set rlist ""
984	if { $_first == "" } {
985	return
986	}
987	foreach comp [$_first components] {
988	set vol $_first-$comp
989	if { [info exists _serverVols($vol)] && $_serverVols($vol) } {
990	array set style {
991	-cutplanes 1
992	}
993	array set style [lindex [$_first components -style $comp] 0]
994	if { $what != "-cutplanes" \|\| $style(-cutplanes) } {
995	lappend rlist $vol
996	}
997	}
998	}
999	return $rlist
1000	}
1001
1002	# ----------------------------------------------------------------------
1003	# USAGE: Zoom in
1004	# USAGE: Zoom out
1005	# USAGE: Zoom reset
1006	#
1007	# Called automatically when the user clicks on one of the zoom
1008	# controls for this widget. Changes the zoom for the current view.
1009	# ----------------------------------------------------------------------
1010	itcl::body Rappture::NanovisViewer::Zoom {option} {
1011	switch -- $option {
1012	"in" {
1013	set _view(zoom) [expr {$_view(zoom)*1.25}]
1014	set _settings($this-zoom) $_view(zoom)
1015	}
1016	"out" {
1017	set _view(zoom) [expr {$_view(zoom)*0.8}]
1018	set _settings($this-zoom) $_view(zoom)
1019	}
1020	"reset" {
1021	array set _view {
1022	theta 45
1023	phi 45
1024	psi 0
1025	zoom 1.0
1026	pan-x 0
1027	pan-y 0
1028	}
1029	if { $_first != "" } {
1030	set location [$_first hints camera]
1031	if { $location != "" } {
1032	array set _view $location
1033	}
1034	}
1035	set xyz [Euler2XYZ $_view(theta) $_view(phi) $_view(psi)]
1036	SendCmd "camera angle $xyz"
1037	PanCamera
1038	set _settings($this-theta) $_view(theta)
1039	set _settings($this-phi) $_view(phi)
1040	set _settings($this-psi) $_view(psi)
1041	set _settings($this-pan-x) $_view(pan-x)
1042	set _settings($this-pan-y) $_view(pan-y)
1043	set _settings($this-zoom) $_view(zoom)
1044	}
1045	}
1046	SendCmd "camera zoom $_view(zoom)"
1047	}
1048
1049	itcl::body Rappture::NanovisViewer::PanCamera {} {
1050	#set x [expr ($_view(pan-x)) / $_limits(xrange)]
1051	#set y [expr ($_view(pan-y)) / $_limits(yrange)]
1052	set x $_view(pan-x)
1053	set y $_view(pan-y)
1054	SendCmd "camera pan $x $y"
1055	}
1056
1057
1058	# ----------------------------------------------------------------------
1059	# USAGE: Rotate click <x> <y>
1060	# USAGE: Rotate drag <x> <y>
1061	# USAGE: Rotate release <x> <y>
1062	#
1063	# Called automatically when the user clicks/drags/releases in the
1064	# plot area. Moves the plot according to the user's actions.
1065	# ----------------------------------------------------------------------
1066	itcl::body Rappture::NanovisViewer::Rotate {option x y} {
1067	switch -- $option {
1068	click {
1069	$itk_component(3dview) configure -cursor fleur
1070	set _click(x) $x
1071	set _click(y) $y
1072	set _click(theta) $_view(theta)
1073	set _click(phi) $_view(phi)
1074	}
1075	drag {
1076	if {[array size _click] == 0} {
1077	Rotate click $x $y
1078	} else {
1079	set w [winfo width $itk_component(3dview)]
1080	set h [winfo height $itk_component(3dview)]
1081	if {$w <= 0 \|\| $h <= 0} {
1082	return
1083	}
1084
1085	if {[catch {
1086	# this fails sometimes for no apparent reason
1087	set dx [expr {double($x-$_click(x))/$w}]
1088	set dy [expr {double($y-$_click(y))/$h}]
1089	}]} {
1090	return
1091	}
1092
1093	#
1094	# Rotate the camera in 3D
1095	#
1096	if {$_view(psi) > 90 \|\| $_view(psi) < -90} {
1097	# when psi is flipped around, theta moves backwards
1098	set dy [expr {-$dy}]
1099	}
1100	set theta [expr {$_view(theta) - $dy*180}]
1101	while {$theta < 0} { set theta [expr {$theta+180}] }
1102	while {$theta > 180} { set theta [expr {$theta-180}] }
1103
1104	if {abs($theta) >= 30 && abs($theta) <= 160} {
1105	set phi [expr {$_view(phi) - $dx*360}]
1106	while {$phi < 0} { set phi [expr {$phi+360}] }
1107	while {$phi > 360} { set phi [expr {$phi-360}] }
1108	set psi $_view(psi)
1109	} else {
1110	set phi $_view(phi)
1111	set psi [expr {$_view(psi) - $dx*360}]
1112	while {$psi < -180} { set psi [expr {$psi+360}] }
1113	while {$psi > 180} { set psi [expr {$psi-360}] }
1114	}
1115
1116	set _view(theta) $theta
1117	set _view(phi) $phi
1118	set _view(psi) $psi
1119	set xyz [Euler2XYZ $theta $phi $psi]
1120	set _settings($this-theta) $_view(theta)
1121	set _settings($this-phi) $_view(phi)
1122	set _settings($this-psi) $_view(psi)
1123	SendCmd "camera angle $xyz"
1124	set _click(x) $x
1125	set _click(y) $y
1126	}
1127	}
1128	release {
1129	Rotate drag $x $y
1130	$itk_component(3dview) configure -cursor ""
1131	catch {unset _click}
1132	}
1133	default {
1134	error "bad option \"$option\": should be click, drag, release"
1135	}
1136	}
1137	}
1138
1139	# ----------------------------------------------------------------------
1140	# USAGE: $this Pan click x y
1141	# $this Pan drag x y
1142	# $this Pan release x y
1143	#
1144	# Called automatically when the user clicks on one of the zoom
1145	# controls for this widget. Changes the zoom for the current view.
1146	# ----------------------------------------------------------------------
1147	itcl::body Rappture::NanovisViewer::Pan {option x y} {
1148	# Experimental stuff
1149	set w [winfo width $itk_component(3dview)]
1150	set h [winfo height $itk_component(3dview)]
1151	if { $option == "set" } {
1152	set x [expr $x / double($w)]
1153	set y [expr $y / double($h)]
1154	set _view(pan-x) [expr $_view(pan-x) + $x]
1155	set _view(pan-y) [expr $_view(pan-y) + $y]
1156	PanCamera
1157	set _settings($this-pan-x) $_view(pan-x)
1158	set _settings($this-pan-y) $_view(pan-y)
1159	return
1160	}
1161	if { $option == "click" } {
1162	set _click(x) $x
1163	set _click(y) $y
1164	$itk_component(3dview) configure -cursor hand1
1165	}
1166	if { $option == "drag" \|\| $option == "release" } {
1167	set dx [expr ($_click(x) - $x)/double($w)]
1168	set dy [expr ($_click(y) - $y)/double($h)]
1169	set _click(x) $x
1170	set _click(y) $y
1171	set _view(pan-x) [expr $_view(pan-x) - $dx]
1172	set _view(pan-y) [expr $_view(pan-y) - $dy]
1173	PanCamera
1174	set _settings($this-pan-x) $_view(pan-x)
1175	set _settings($this-pan-y) $_view(pan-y)
1176	}
1177	if { $option == "release" } {
1178	$itk_component(3dview) configure -cursor ""
1179	}
1180	}
1181
1182	# ----------------------------------------------------------------------
1183	# USAGE: FixSettings <what> ?<value>?
1184	#
1185	# Used internally to update rendering settings whenever parameters
1186	# change in the popup settings panel. Sends the new settings off
1187	# to the back end.
1188	# ----------------------------------------------------------------------
1189	itcl::body Rappture::NanovisViewer::FixSettings {what {value ""}} {
1190	switch -- $what {
1191	light {
1192	if {[isconnected]} {
1193	set val $_settings($this-light)
1194	set sval [expr {0.01*$val}]
1195	SendCmd "volume shading diffuse $sval"
1196	set sval [expr {sqrt($val+1.0)}]
1197	SendCmd "volume shading specular $sval"
1198	}
1199	}
1200	transp {
1201	if {[isconnected]} {
1202	set val $_settings($this-transp)
1203	set sval [expr {0.2*$val+1}]
1204	SendCmd "volume shading opacity $sval"
1205	}
1206	}
1207	opacity {
1208	if {[isconnected] && [array size _activeTfs] > 0 } {
1209	set val $_settings($this-opacity)
1210	set sval [expr { 0.01 * double($val) }]
1211	foreach tf [array names _activeTfs] {
1212	set _settings($this-$tf-opacity) $sval
1213	set _activeTfs($tf) 0
1214	}
1215	updatetransferfuncs
1216	}
1217	}
1218
1219	thickness {
1220	if {[isconnected] && [array names _activeTfs] > 0 } {
1221	set val $_settings($this-thickness)
1222	# Scale values between 0.00001 and 0.01000
1223	set sval [expr {0.0001*double($val)}]
1224	foreach tf [array names _activeTfs] {
1225	set _settings($this-$tf-thickness) $sval
1226	set _activeTfs($tf) 0
1227	}
1228	updatetransferfuncs
1229	}
1230	}
1231	"outline" {
1232	if {[isconnected]} {
1233	SendCmd "volume outline state $_settings($this-outline)"
1234	}
1235	}
1236	"isosurface" {
1237	if {[isconnected]} {
1238	SendCmd "volume shading isosurface $_settings($this-isosurface)"
1239	}
1240	}
1241	"grid" {
1242	if { [isconnected] } {
1243	SendCmd "grid visible $_settings($this-grid)"
1244	}
1245	}
1246	"axes" {
1247	if { [isconnected] } {
1248	SendCmd "axis visible $_settings($this-axes)"
1249	}
1250	}
1251	"legend" {
1252	if { $_settings($this-legend) } {
1253	blt::table $itk_component(plotarea) \
1254	0,0 $itk_component(3dview) -fill both \
1255	1,0 $itk_component(legend) -fill x
1256	blt::table configure $itk_component(plotarea) r1 -resize none
1257	} else {
1258	blt::table forget $itk_component(legend)
1259	}
1260	}
1261	"volume" {
1262	if { [isconnected] } {
1263	set vols [CurrentVolumes -cutplanes]
1264	SendCmd "volume data state $_settings($this-volume) $vols"
1265	}
1266	}
1267	"xcutplane" - "ycutplane" - "zcutplane" {
1268	set axis [string range $what 0 0]
1269	set bool $_settings($this-$what)
1270	if { [isconnected] } {
1271	set vols [CurrentVolumes -cutplanes]
1272	set vol [lindex $vols 0]
1273	SendCmd "cutplane state $bool $axis $vol"
1274	}
1275	if { $bool } {
1276	$itk_component(${axis}CutScale) configure -state normal \
1277	-troughcolor white
1278	} else {
1279	$itk_component(${axis}CutScale) configure -state disabled \
1280	-troughcolor grey82
1281	}
1282	}
1283	default {
1284	error "don't know how to fix $what"
1285	}
1286	}
1287	}
1288
1289	# ----------------------------------------------------------------------
1290	# USAGE: FixLegend
1291	#
1292	# Used internally to update the legend area whenever it changes size
1293	# or when the field changes. Asks the server to send a new legend
1294	# for the current field.
1295	# ----------------------------------------------------------------------
1296	itcl::body Rappture::NanovisViewer::FixLegend {} {
1297	set _resizeLegendPending 0
1298	set lineht [font metrics $itk_option(-font) -linespace]
1299	set w [expr {$_width-20}]
1300	set h [expr {[winfo height $itk_component(legend)]-20-$lineht}]
1301	if {$w > 0 && $h > 0 && [array names _activeTfs] > 0 && $_first != "" } {
1302	set vol [lindex [CurrentVolumes] 0]
1303	if { [info exists _vol2style($vol)] } {
1304	SendCmd "legend $_vol2style($vol) $w $h"
1305	}
1306	} else {
1307	# Can't do this as this will remove the items associated with the
1308	# isomarkers.
1309
1310	#$itk_component(legend) delete all
1311	}
1312	}
1313
1314	#
1315	# NameTransferFunc --
1316	#
1317	# Creates a transfer function name based on the <style> settings in the
1318	# library run.xml file. This placeholder will be used later to create
1319	# and send the actual transfer function once the data info has been sent
1320	# to us by the render server. [We won't know the volume limits until the
1321	# server parses the 3D data and sends back the limits via ReceiveData.]
1322	#
1323	# FIXME: The current way we generate transfer-function names completely
1324	# ignores the -markers option. The problem is that we are forced
1325	# to compute the name from an increasing complex set of values:
1326	# color, levels, marker, opacity. I think we're stuck doing it
1327	# now.
1328	#
1329	itcl::body Rappture::NanovisViewer::NameTransferFunc { dataobj comp } {
1330	array set style {
1331	-color rainbow
1332	-levels 6
1333	-opacity 1.0
1334	}
1335	array set style [lindex [$dataobj components -style $comp] 0]
1336	set tf "$style(-color):$style(-levels):$style(-opacity)"
1337	set _vol2style($dataobj-$comp) $tf
1338	lappend _style2vols($tf) $dataobj-$comp
1339	return $tf
1340	}
1341
1342	#
1343	# ComputeTransferFunc --
1344	#
1345	# Computes and sends the transfer function to the render server. It's
1346	# assumed that the volume data limits are known and that the global
1347	# transfer-functions slider values have be setup. Both parts are
1348	# needed to compute the relative value (location) of the marker, and
1349	# the alpha map of the transfer function.
1350	#
1351	itcl::body Rappture::NanovisViewer::ComputeTransferFunc { tf } {
1352	array set style {
1353	-color rainbow
1354	-levels 6
1355	-opacity 1.0
1356	}
1357	foreach {dataobj comp} [split [lindex $_style2vols($tf) 0] -] break
1358	array set style [lindex [$dataobj components -style $comp] 0]
1359
1360
1361	# We have to parse the style attributes for a volume using this
1362	# transfer-function once. This sets up the initial isomarkers for the
1363	# transfer function. The user may add/delete markers, so we have to
1364	# maintain a list of markers for each transfer-function. We use the one
1365	# of the volumes (the first in the list) using the transfer-function as a
1366	# reference.
1367	#
1368	# FIXME: The current way we generate transfer-function names completely
1369	# ignores the -markers option. The problem is that we are forced
1370	# to compute the name from an increasing complex set of values:
1371	# color, levels, marker, opacity. I think the cow's out of the
1372	# barn on this one.
1373
1374	if { ![info exists _isomarkers($tf)] } {
1375	# Have to defer creation of isomarkers until we have data limits
1376	if { [info exists style(-markers)] } {
1377	ParseMarkersOption $tf $style(-markers)
1378	} else {
1379	ParseLevelsOption $tf $style(-levels)
1380	}
1381	}
1382	if {$style(-color) == "rainbow"} {
1383	set style(-color) "white:yellow:green:cyan:blue:magenta"
1384	}
1385	set clist [split $style(-color) :]
1386	set cmap "0.0 [Color2RGB white] "
1387	for {set i 0} {$i < [llength $clist]} {incr i} {
1388	set x [expr {double($i+1)/([llength $clist]+1)}]
1389	set color [lindex $clist $i]
1390	append cmap "$x [Color2RGB $color] "
1391	}
1392	append cmap "1.0 [Color2RGB $color]"
1393
1394	set tag $this-$tf
1395	if { ![info exists _settings($tag-opacity)] } {
1396	set _settings($tag-opacity) $style(-opacity)
1397	}
1398	set max $_settings($tag-opacity)
1399
1400	set isovalues {}
1401	foreach m $_isomarkers($tf) {
1402	lappend isovalues [$m relval]
1403	}
1404	# Sort the isovalues
1405	set isovalues [lsort -real $isovalues]
1406
1407	if { ![info exists _settings($tag-thickness)]} {
1408	set _settings($tag-thickness) 0.05
1409	}
1410	set delta $_settings($tag-thickness)
1411
1412	set first [lindex $isovalues 0]
1413	set last [lindex $isovalues end]
1414	set wmap ""
1415	if { $first == "" \|\| $first != 0.0 } {
1416	lappend wmap 0.0 0.0
1417	}
1418	foreach x $isovalues {
1419	set x1 [expr {$x-$delta-0.00001}]
1420	set x2 [expr {$x-$delta}]
1421	set x3 [expr {$x+$delta}]
1422	set x4 [expr {$x+$delta+0.00001}]
1423	if { $x1 < 0.0 } {
1424	set x1 0.0
1425	} elseif { $x1 > 1.0 } {
1426	set x1 1.0
1427	}
1428	if { $x2 < 0.0 } {
1429	set x2 0.0
1430	} elseif { $x2 > 1.0 } {
1431	set x2 1.0
1432	}
1433	if { $x3 < 0.0 } {
1434	set x3 0.0
1435	} elseif { $x3 > 1.0 } {
1436	set x3 1.0
1437	}
1438	if { $x4 < 0.0 } {
1439	set x4 0.0
1440	} elseif { $x4 > 1.0 } {
1441	set x4 1.0
1442	}
1443	# add spikes in the middle
1444	lappend wmap $x1 0.0
1445	lappend wmap $x2 $max
1446	lappend wmap $x3 $max
1447	lappend wmap $x4 0.0
1448	}
1449	if { $last == "" \|\| $last != 1.0 } {
1450	lappend wmap 1.0 0.0
1451	}
1452	SendCmd "transfunc define $tf { $cmap } { $wmap }"
1453	}
1454
1455	# ----------------------------------------------------------------------
1456	# CONFIGURATION OPTION: -plotbackground
1457	# ----------------------------------------------------------------------
1458	itcl::configbody Rappture::NanovisViewer::plotbackground {
1459	if { [isconnected] } {
1460	foreach {r g b} [Color2RGB $itk_option(-plotbackground)] break
1461	#fix this!
1462	#SendCmd "color background $r $g $b"
1463	}
1464	}
1465
1466	# ----------------------------------------------------------------------
1467	# CONFIGURATION OPTION: -plotforeground
1468	# ----------------------------------------------------------------------
1469	itcl::configbody Rappture::NanovisViewer::plotforeground {
1470	if { [isconnected] } {
1471	foreach {r g b} [Color2RGB $itk_option(-plotforeground)] break
1472	#fix this!
1473	#SendCmd "color background $r $g $b"
1474	}
1475	}
1476
1477	# ----------------------------------------------------------------------
1478	# CONFIGURATION OPTION: -plotoutline
1479	# ----------------------------------------------------------------------
1480	itcl::configbody Rappture::NanovisViewer::plotoutline {
1481	# Must check if we are connected because this routine is called from the
1482	# class body when the -plotoutline itk_option is defined. At that point
1483	# the NanovisViewer class constructor hasn't been called, so we can't
1484	# start sending commands to visualization server.
1485	if { [isconnected] } {
1486	if {"" == $itk_option(-plotoutline)} {
1487	SendCmd "volume outline state off"
1488	} else {
1489	SendCmd "volume outline state on"
1490	SendCmd "volume outline color [Color2RGB $itk_option(-plotoutline)]"
1491	}
1492	}
1493	}
1494
1495	#
1496	# The -levels option takes a single value that represents the number
1497	# of evenly distributed markers based on the current data range. Each
1498	# marker is a relative value from 0.0 to 1.0.
1499	#
1500	itcl::body Rappture::NanovisViewer::ParseLevelsOption { tf levels } {
1501	set c $itk_component(legend)
1502	regsub -all "," $levels " " levels
1503	if {[string is int $levels]} {
1504	for {set i 1} { $i <= $levels } {incr i} {
1505	set x [expr {double($i)/($levels+1)}]
1506	set m [Rappture::IsoMarker \#auto $c $this $tf]
1507	$m relval $x
1508	lappend _isomarkers($tf) $m
1509	}
1510	} else {
1511	foreach x $levels {
1512	set m [Rappture::IsoMarker \#auto $c $this $tf]
1513	$m relval $x
1514	lappend _isomarkers($tf) $m
1515	}
1516	}
1517	}
1518
1519	#
1520	# The -markers option takes a list of zero or more values (the values
1521	# may be separated either by spaces or commas) that have the following
1522	# format:
1523	#
1524	# N% Percent of current total data range. Converted to
1525	# to a relative value between 0.0 and 1.0.
1526	# N Absolute value of marker. If the marker is outside of
1527	# the current range, it will be displayed on the outer
1528	# edge of the legends, but it range it represents will
1529	# not be seen.
1530	#
1531	itcl::body Rappture::NanovisViewer::ParseMarkersOption { tf markers } {
1532	set c $itk_component(legend)
1533	regsub -all "," $markers " " markers
1534	foreach marker $markers {
1535	set n [scan $marker "%g%s" value suffix]
1536	if { $n == 2 && $suffix == "%" } {
1537	# ${n}% : Set relative value.
1538	set value [expr {$value * 0.01}]
1539	set m [Rappture::IsoMarker \#auto $c $this $tf]
1540	$m relval $value
1541	lappend _isomarkers($tf) $m
1542	} else {
1543	# ${n} : Set absolute value.
1544	set m [Rappture::IsoMarker \#auto $c $this $tf]
1545	$m absval $value
1546	lappend _isomarkers($tf) $m
1547	}
1548	}
1549	}
1550
1551	# ----------------------------------------------------------------------
1552	# USAGE: UndateTransferFuncs
1553	# ----------------------------------------------------------------------
1554	itcl::body Rappture::NanovisViewer::updatetransferfuncs {} {
1555	$_dispatcher event -idle !send_transfunc
1556	}
1557
1558	itcl::body Rappture::NanovisViewer::AddIsoMarker { x y } {
1559	if { $_first == "" } {
1560	error "active transfer function isn't set"
1561	}
1562	set vol [lindex [CurrentVolumes] 0]
1563	set tf $_vol2style($vol)
1564	set c $itk_component(legend)
1565	set m [Rappture::IsoMarker \#auto $c $this $tf]
1566	set w [winfo width $c]
1567	$m relval [expr {double($x-10)/($w-20)}]
1568	lappend _isomarkers($tf) $m
1569	updatetransferfuncs
1570	return 1
1571	}
1572
1573	itcl::body Rappture::NanovisViewer::rmdupmarker { marker x } {
1574	set tf [$marker transferfunc]
1575	set bool 0
1576	if { [info exists _isomarkers($tf)] } {
1577	set list {}
1578	set marker [namespace tail $marker]
1579	foreach m $_isomarkers($tf) {
1580	set sx [$m screenpos]
1581	if { $m != $marker } {
1582	if { $x >= ($sx-3) && $x <= ($sx+3) } {
1583	$marker relval [$m relval]
1584	itcl::delete object $m
1585	bell
1586	set bool 1
1587	continue
1588	}
1589	}
1590	lappend list $m
1591	}
1592	set _isomarkers($tf) $list
1593	updatetransferfuncs
1594	}
1595	return $bool
1596	}
1597
1598	itcl::body Rappture::NanovisViewer::overmarker { marker x } {
1599	set tf [$marker transferfunc]
1600	if { [info exists _isomarkers($tf)] } {
1601	set marker [namespace tail $marker]
1602	foreach m $_isomarkers($tf) {
1603	set sx [$m screenpos]
1604	if { $m != $marker } {
1605	set bool [expr { $x >= ($sx-3) && $x <= ($sx+3) }]
1606	$m activate $bool
1607	}
1608	}
1609	}
1610	return ""
1611	}
1612
1613	itcl::body Rappture::NanovisViewer::limits { tf } {
1614	set _limits(min) 0.0
1615	set _limits(max) 1.0
1616	if { ![info exists _style2vols($tf)] } {
1617	return [array get _limits]
1618	}
1619	set min ""; set max ""
1620	foreach vol $_style2vols($tf) {
1621	if { ![info exists _serverVols($vol)] } {
1622	continue
1623	}
1624	if { ![info exists _limits($vol-min)] } {
1625	continue
1626	}
1627	if { $min == "" \|\| $min > $_limits($vol-min) } {
1628	set min $_limits($vol-min)
1629	}
1630	if { $max == "" \|\| $max < $_limits($vol-max) } {
1631	set max $_limits($vol-max)
1632	}
1633	}
1634	if { $min != "" } {
1635	set _limits(min) $min
1636	}
1637	if { $max != "" } {
1638	set _limits(max) $max
1639	}
1640	return [array get _limits]
1641	}
1642
1643
1644	itcl::body Rappture::NanovisViewer::BuildViewTab {} {
1645	foreach { key value } {
1646	grid 0
1647	axes 1
1648	outline 1
1649	volume 1
1650	legend 1
1651	particles 1
1652	lic 1
1653	} {
1654	set _settings($this-$key) $value
1655	}
1656
1657	set fg [option get $itk_component(hull) font Font]
1658	#set bfg [option get $itk_component(hull) boldFont Font]
1659
1660	set inner [$itk_component(main) insert end \
1661	-title "View Settings" \
1662	-icon [Rappture::icon wrench]]
1663	$inner configure -borderwidth 4
1664
1665	set ::Rappture::NanovisViewer::_settings($this-isosurface) 0
1666	checkbutton $inner.isosurface \
1667	-text "Isosurface shading" \
1668	-variable [itcl::scope _settings($this-isosurface)] \
1669	-command [itcl::code $this FixSettings isosurface] \
1670	-font "Arial 9"
1671
1672	checkbutton $inner.axes \
1673	-text "Axes" \
1674	-variable [itcl::scope _settings($this-axes)] \
1675	-command [itcl::code $this FixSettings axes] \
1676	-font "Arial 9"
1677
1678	checkbutton $inner.grid \
1679	-text "Grid" \
1680	-variable [itcl::scope _settings($this-grid)] \
1681	-command [itcl::code $this FixSettings grid] \
1682	-font "Arial 9"
1683
1684	checkbutton $inner.outline \
1685	-text "Outline" \
1686	-variable [itcl::scope _settings($this-outline)] \
1687	-command [itcl::code $this FixSettings outline] \
1688	-font "Arial 9"
1689
1690	checkbutton $inner.legend \
1691	-text "Legend" \
1692	-variable [itcl::scope _settings($this-legend)] \
1693	-command [itcl::code $this FixSettings legend] \
1694	-font "Arial 9"
1695
1696	checkbutton $inner.volume \
1697	-text "Volume" \
1698	-variable [itcl::scope _settings($this-volume)] \
1699	-command [itcl::code $this FixSettings volume] \
1700	-font "Arial 9"
1701
1702	blt::table $inner \
1703	0,0 $inner.axes -columnspan 2 -anchor w \
1704	1,0 $inner.grid -columnspan 2 -anchor w \
1705	2,0 $inner.outline -columnspan 2 -anchor w \
1706	3,0 $inner.volume -columnspan 2 -anchor w \
1707	4,0 $inner.legend -columnspan 2 -anchor w
1708
1709	if 0 {
1710	bind $inner <Map> [itcl::code $this GetVolumeInfo $inner]
1711	}
1712	blt::table configure $inner r* -resize none
1713	blt::table configure $inner r5 -resize expand
1714	}
1715
1716	itcl::body Rappture::NanovisViewer::BuildVolumeTab {} {
1717	foreach { key value } {
1718	light 40
1719	transp 50
1720	opacity 100
1721	thickness 350
1722	} {
1723	set _settings($this-$key) $value
1724	}
1725
1726	set inner [$itk_component(main) insert end \
1727	-title "Volume Settings" \
1728	-icon [Rappture::icon volume-on]]
1729	$inner configure -borderwidth 4
1730
1731	set fg [option get $itk_component(hull) font Font]
1732	#set bfg [option get $itk_component(hull) boldFont Font]
1733
1734	checkbutton $inner.vol -text "Show volume" -font $fg \
1735	-variable [itcl::scope _settings($this-volume)] \
1736	-command [itcl::code $this FixSettings volume]
1737	label $inner.shading -text "Shading:" -font $fg
1738
1739	label $inner.dim -text "Dim" -font $fg
1740	::scale $inner.light -from 0 -to 100 -orient horizontal \
1741	-variable [itcl::scope _settings($this-light)] \
1742	-width 10 \
1743	-showvalue off -command [itcl::code $this FixSettings light]
1744	label $inner.bright -text "Bright" -font $fg
1745
1746	label $inner.fog -text "Fog" -font $fg
1747	::scale $inner.transp -from 0 -to 100 -orient horizontal \
1748	-variable [itcl::scope _settings($this-transp)] \
1749	-width 10 \
1750	-showvalue off -command [itcl::code $this FixSettings transp]
1751	label $inner.plastic -text "Plastic" -font $fg
1752
1753	label $inner.clear -text "Clear" -font $fg
1754	::scale $inner.opacity -from 0 -to 100 -orient horizontal \
1755	-variable [itcl::scope _settings($this-opacity)] \
1756	-width 10 \
1757	-showvalue off -command [itcl::code $this FixSettings opacity]
1758	label $inner.opaque -text "Opaque" -font $fg
1759
1760	label $inner.thin -text "Thin" -font $fg
1761	::scale $inner.thickness -from 0 -to 1000 -orient horizontal \
1762	-variable [itcl::scope _settings($this-thickness)] \
1763	-width 10 \
1764	-showvalue off -command [itcl::code $this FixSettings thickness]
1765	label $inner.thick -text "Thick" -font $fg
1766
1767	blt::table $inner \
1768	0,0 $inner.vol -columnspan 4 -anchor w -pady 2 \
1769	1,0 $inner.shading -columnspan 4 -anchor w -pady {10 2} \
1770	2,0 $inner.dim -anchor e -pady 2 \
1771	2,1 $inner.light -columnspan 2 -pady 2 -fill x \
1772	2,3 $inner.bright -anchor w -pady 2 \
1773	3,0 $inner.fog -anchor e -pady 2 \
1774	3,1 $inner.transp -columnspan 2 -pady 2 -fill x \
1775	3,3 $inner.plastic -anchor w -pady 2 \
1776	4,0 $inner.clear -anchor e -pady 2 \
1777	4,1 $inner.opacity -columnspan 2 -pady 2 -fill x\
1778	4,3 $inner.opaque -anchor w -pady 2 \
1779	5,0 $inner.thin -anchor e -pady 2 \
1780	5,1 $inner.thickness -columnspan 2 -pady 2 -fill x\
1781	5,3 $inner.thick -anchor w -pady 2
1782
1783	blt::table configure $inner c0 c1 c3 r* -resize none
1784	blt::table configure $inner r6 -resize expand
1785	}
1786
1787	itcl::body Rappture::NanovisViewer::BuildCutplanesTab {} {
1788	set inner [$itk_component(main) insert end \
1789	-title "Cutplane Settings" \
1790	-icon [Rappture::icon cutbutton]]
1791	$inner configure -borderwidth 4
1792
1793	# X-value slicer...
1794	itk_component add xCutButton {
1795	Rappture::PushButton $inner.xbutton \
1796	-onimage [Rappture::icon x-cutplane] \
1797	-offimage [Rappture::icon x-cutplane] \
1798	-command [itcl::code $this FixSettings xcutplane] \
1799	-variable [itcl::scope _settings($this-xcutplane)]
1800	}
1801	Rappture::Tooltip::for $itk_component(xCutButton) \
1802	"Toggle the X cut plane on/off"
1803
1804	itk_component add xCutScale {
1805	::scale $inner.xval -from 100 -to 0 \
1806	-width 10 -orient vertical -showvalue off \
1807	-borderwidth 1 -highlightthickness 0 \
1808	-command [itcl::code $this Slice move x] \
1809	-variable [itcl::scope _settings($this-xcutposition)]
1810	} {
1811	usual
1812	ignore -borderwidth -highlightthickness
1813	}
1814	# Set the default cutplane value before disabling the scale.
1815	$itk_component(xCutScale) set 50
1816	$itk_component(xCutScale) configure -state disabled
1817	Rappture::Tooltip::for $itk_component(xCutScale) \
1818	"@[itcl::code $this SlicerTip x]"
1819
1820	# Y-value slicer...
1821	itk_component add yCutButton {
1822	Rappture::PushButton $inner.ybutton \
1823	-onimage [Rappture::icon y-cutplane] \
1824	-offimage [Rappture::icon y-cutplane] \
1825	-command [itcl::code $this FixSettings ycutplane] \
1826	-variable [itcl::scope _settings($this-ycutplane)]
1827	}
1828	Rappture::Tooltip::for $itk_component(yCutButton) \
1829	"Toggle the Y cut plane on/off"
1830
1831	itk_component add yCutScale {
1832	::scale $inner.yval -from 100 -to 0 \
1833	-width 10 -orient vertical -showvalue off \
1834	-borderwidth 1 -highlightthickness 0 \
1835	-command [itcl::code $this Slice move y] \
1836	-variable [itcl::scope _settings($this-ycutposition)]
1837	} {
1838	usual
1839	ignore -borderwidth -highlightthickness
1840	}
1841	Rappture::Tooltip::for $itk_component(yCutScale) \
1842	"@[itcl::code $this SlicerTip y]"
1843	# Set the default cutplane value before disabling the scale.
1844	$itk_component(yCutScale) set 50
1845	$itk_component(yCutScale) configure -state disabled
1846
1847	# Z-value slicer...
1848	itk_component add zCutButton {
1849	Rappture::PushButton $inner.zbutton \
1850	-onimage [Rappture::icon z-cutplane] \
1851	-offimage [Rappture::icon z-cutplane] \
1852	-command [itcl::code $this FixSettings zcutplane] \
1853	-variable [itcl::scope _settings($this-zcutplane)]
1854	}
1855	Rappture::Tooltip::for $itk_component(zCutButton) \
1856	"Toggle the Z cut plane on/off"
1857
1858	itk_component add zCutScale {
1859	::scale $inner.zval -from 100 -to 0 \
1860	-width 10 -orient vertical -showvalue off \
1861	-borderwidth 1 -highlightthickness 0 \
1862	-command [itcl::code $this Slice move z] \
1863	-variable [itcl::scope _settings($this-zcutposition)]
1864	} {
1865	usual
1866	ignore -borderwidth -highlightthickness
1867	}
1868	$itk_component(zCutScale) set 50
1869	$itk_component(zCutScale) configure -state disabled
1870	#$itk_component(zCutScale) configure -state disabled
1871	Rappture::Tooltip::for $itk_component(zCutScale) \
1872	"@[itcl::code $this SlicerTip z]"
1873
1874	blt::table $inner \
1875	1,1 $itk_component(xCutButton) \
1876	1,2 $itk_component(yCutButton) \
1877	1,3 $itk_component(zCutButton) \
1878	0,1 $itk_component(xCutScale) \
1879	0,2 $itk_component(yCutScale) \
1880	0,3 $itk_component(zCutScale)
1881
1882	blt::table configure $inner r0 r1 c* -resize none
1883	blt::table configure $inner r2 c4 -resize expand
1884	blt::table configure $inner c0 -width 2
1885	blt::table configure $inner c1 c2 c3 -padx 2
1886	}
1887
1888	itcl::body Rappture::NanovisViewer::BuildCameraTab {} {
1889	set inner [$itk_component(main) insert end \
1890	-title "Camera Settings" \
1891	-icon [Rappture::icon camera]]
1892	$inner configure -borderwidth 4
1893
1894	set labels { phi theta psi pan-x pan-y zoom }
1895	set row 0
1896	foreach tag $labels {
1897	label $inner.${tag}label -text $tag -font "Arial 9"
1898	entry $inner.${tag} -font "Arial 9" -bg white \
1899	-textvariable [itcl::scope _settings($this-$tag)]
1900	bind $inner.${tag} <KeyPress-Return> \
1901	[itcl::code $this camera set ${tag}]
1902	blt::table $inner \
1903	$row,0 $inner.${tag}label -anchor e -pady 2 \
1904	$row,1 $inner.${tag} -anchor w -pady 2
1905	blt::table configure $inner r$row -resize none
1906	incr row
1907	}
1908
1909	itk_component add orientation {
1910	Rappture::Combobox $inner.orientation -width 10 -editable no
1911	}
1912	$inner.orientation choices insert end \
1913	"front" "0 90 0" \
1914	"back" "180 90 0" \
1915	"top" "0 0 0" \
1916	"bottom" "0 180 0" \
1917	"left" "270 90 0 " \
1918	"right" "90 90 0" \
1919	"default" "45 45 0"
1920	$itk_component(orientation) value "default"
1921	bind $inner.orientation <<Value>> [itcl::code $this SetOrientation]
1922
1923	blt::table configure $inner c0 c1 -resize none
1924	blt::table configure $inner c2 -resize expand
1925	blt::table configure $inner r$row -resize expand
1926	}
1927
1928
1929	# ----------------------------------------------------------------------
1930	# USAGE: Slice move x\|y\|z <newval>
1931	#
1932	# Called automatically when the user drags the slider to move the
1933	# cut plane that slices 3D data. Gets the current value from the
1934	# slider and moves the cut plane to the appropriate point in the
1935	# data set.
1936	# ----------------------------------------------------------------------
1937	itcl::body Rappture::NanovisViewer::Slice {option args} {
1938	switch -- $option {
1939	move {
1940	if {[llength $args] != 2} {
1941	error "wrong # args: should be \"Slice move x\|y\|z newval\""
1942	}
1943	set axis [lindex $args 0]
1944	set newval [lindex $args 1]
1945
1946	set newpos [expr {0.01*$newval}]
1947	set vols [CurrentVolumes -cutplanes]
1948	set vol [lindex $vols 0]
1949	SendCmd "cutplane position $newpos $axis $vol"
1950	}
1951	default {
1952	error "bad option \"$option\": should be axis, move, or volume"
1953	}
1954	}
1955	}
1956
1957	# ----------------------------------------------------------------------
1958	# USAGE: SlicerTip <axis>
1959	#
1960	# Used internally to generate a tooltip for the x/y/z slicer controls.
1961	# Returns a message that includes the current slicer value.
1962	# ----------------------------------------------------------------------
1963	itcl::body Rappture::NanovisViewer::SlicerTip {axis} {
1964	set val [$itk_component(${axis}CutScale) get]
1965	# set val [expr {0.01*($val-50)
1966	# *($_limits(${axis}max)-$_limits(${axis}min))
1967	# + 0.5*($_limits(${axis}max)+$_limits(${axis}min))}]
1968	return "Move the [string toupper $axis] cut plane.\nCurrently: $axis = $val%"
1969	}
1970
1971
1972	itcl::body Rappture::NanovisViewer::DoResize {} {
1973	SendCmd "screen $_width $_height"
1974	set _resizePending 0
1975	}
1976
1977	itcl::body Rappture::NanovisViewer::EventuallyResize { w h } {
1978	set _width $w
1979	set _height $h
1980	if { !$_resizePending } {
1981	$_dispatcher event -idle !resize
1982	set _resizePending 1
1983	}
1984	}
1985
1986	itcl::body Rappture::NanovisViewer::EventuallyResizeLegend {} {
1987	if { !$_resizeLegendPending } {
1988	$_dispatcher event -idle !legend
1989	set _resizeLegendPending 1
1990	}
1991	}
1992
1993
1994	# camera --
1995	#
1996	itcl::body Rappture::NanovisViewer::camera {option args} {
1997	switch -- $option {
1998	"show" {
1999	puts [array get _view]
2000	}
2001	"set" {
2002	set who [lindex $args 0]
2003	set x $_settings($this-$who)
2004	set code [catch { string is double $x } result]
2005	if { $code != 0 \|\| !$result } {
2006	set _settings($this-$who) $_view($who)
2007	return
2008	}
2009	switch -- $who {
2010	"pan-x" - "pan-y" {
2011	set _view($who) $_settings($this-$who)
2012	PanCamera
2013	}
2014	"phi" - "theta" - "psi" {
2015	set _view($who) $_settings($this-$who)
2016	set xyz [Euler2XYZ $_view(theta) $_view(phi) $_view(psi)]
2017	SendCmd "camera angle $xyz"
2018	}
2019	"zoom" {
2020	set _view($who) $_settings($this-$who)
2021	SendCmd "camera zoom $_view(zoom)"
2022	}
2023	}
2024	}
2025	}
2026	}
2027
2028	itcl::body Rappture::NanovisViewer::GetVolumeInfo { w } {
2029	set flowobj ""
2030	foreach key [array names _obj2flow] {
2031	set flowobj $_obj2flow($key)
2032	break
2033	}
2034	if { $flowobj == "" } {
2035	return
2036	}
2037	if { [winfo exists $w.frame] } {
2038	destroy $w.frame
2039	}
2040	set inner [frame $w.frame]
2041	blt::table $w \
2042	5,0 $inner -fill both -columnspan 2 -anchor nw
2043	array set hints [$dataobj hints]
2044
2045	label $inner.volumes -text "Volumes" -font "Arial 9 bold"
2046	blt::table $inner \
2047	1,0 $inner.volumes -anchor w \
2048	blt::table configure $inner c0 c1 -resize none
2049	blt::table configure $inner c2 -resize expand
2050
2051	set row 3
2052	set volumes [get]
2053	if { [llength $volumes] > 0 } {
2054	blt::table $inner $row,0 $inner.volumes -anchor w
2055	incr row
2056	}
2057	foreach vol $volumes {
2058	array unset info
2059	array set info $vol
2060	set name $info(name)
2061	if { ![info exists _settings($this-volume-$name)] } {
2062	set _settings($this-volume-$name) $info(hide)
2063	}
2064	checkbutton $inner.vol$row -text $info(label) \
2065	-variable [itcl::scope _settings($this-volume-$name)] \
2066	-onvalue 0 -offvalue 1 \
2067	-command [itcl::code $this volume $key $name] \
2068	-font "Arial 9"
2069	Rappture::Tooltip::for $inner.vol$row $info(description)
2070	blt::table $inner $row,0 $inner.vol$row -anchor w
2071	if { !$_settings($this-volume-$name) } {
2072	$inner.vol$row select
2073	}
2074	incr row
2075	}
2076	blt::table configure $inner r* -resize none
2077	blt::table configure $inner r$row -resize expand
2078	blt::table configure $inner c3 -resize expand
2079	event generate [winfo parent [winfo parent $w]] <Configure>
2080	}
2081
2082	itcl::body Rappture::NanovisViewer::volume { tag name } {
2083	set bool $_settings($this-volume-$name)
2084	SendCmd "volume statue $bool $name"
2085	}
2086
2087
2088	itcl::body Rappture::NanovisViewer::SetOrientation {} {
2089	set angles [$itk_component(orientation) value]
2090	foreach name { theta phi psi } angle $angles {
2091	set _view($name) $angle
2092	}
2093	set xyz [Euler2XYZ $_view(theta) $_view(phi) $_view(psi)]
2094	SendCmd "camera angle $xyz"
2095	}

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