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source: branches/1.3/gui/scripts/nanovisviewer.tcl @ 5214

Last change on this file since 5214 was 5214, checked in by ldelgass, 9 years ago
Merge r5205,r5210:5211
File size: 74.4 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 parameters {title args} {
80	# do nothing
81	}
82	public method rmdupmarker { m x }
83	public method scale {args}
84	public method updatetransferfuncs {}
85
86	protected method Connect {}
87	protected method CurrentDatasets {{what -all}}
88	protected method Disconnect {}
89	protected method DoResize {}
90	protected method FixLegend {}
91	protected method AdjustSetting {what {value ""}}
92	protected method InitSettings { args }
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 SendTransferFuncs {}
100	protected method Slice {option args}
101	protected method SlicerTip {axis}
102	protected method Zoom {option}
103
104	# The following methods are only used by this class.
105	private method AddIsoMarker { x y }
106	private method BuildCameraTab {}
107	private method BuildCutplanesTab {}
108	private method BuildViewTab {}
109	private method BuildVolumeTab {}
110	private method ResetColormap { color }
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 { side }
121
122	private variable _arcball ""
123
124	private variable _dlist "" ;# list of data objects
125	private variable _allDataObjs
126	private variable _obj2ovride ;# maps dataobj => style override
127	private variable _serverDatasets ;# 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 _recvdDatasets ;# list of data objs to send to server
132	private variable _dataset2style ;# maps dataobj-component to transfunc
133	private variable _style2datasets ;# 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 variable _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
148	common _downloadPopup ;# download options from popup
149	private common _hardcopy
150	private variable _width 0
151	private variable _height 0
152	private variable _resizePending 0
153	private variable _resizeLegendPending 0
154	}
155
156	itk::usual NanovisViewer {
157	keep -background -foreground -cursor -font
158	keep -plotbackground -plotforeground
159	}
160
161	# ----------------------------------------------------------------------
162	# CONSTRUCTOR
163	# ----------------------------------------------------------------------
164	itcl::body Rappture::NanovisViewer::constructor {hostlist args} {
165	set _serverType "nanovis"
166
167	# Draw legend event
168	$_dispatcher register !legend
169	$_dispatcher dispatch $this !legend "[itcl::code $this FixLegend]; list"
170
171	# Send transfer functions event
172	$_dispatcher register !send_transfunc
173	$_dispatcher dispatch $this !send_transfunc \
174	"[itcl::code $this SendTransferFuncs]; list"
175
176	# Rebuild event
177	$_dispatcher register !rebuild
178	$_dispatcher dispatch $this !rebuild "[itcl::code $this Rebuild]; list"
179
180	# Resize event
181	$_dispatcher register !resize
182	$_dispatcher dispatch $this !resize "[itcl::code $this DoResize]; list"
183
184	#
185	# Populate parser with commands handle incoming requests
186	#
187	$_parser alias image [itcl::code $this ReceiveImage]
188	$_parser alias legend [itcl::code $this ReceiveLegend]
189	$_parser alias data [itcl::code $this ReceiveData]
190
191	# Initialize the view to some default parameters.
192	array set _view {
193	qw 0.853553
194	qx -0.353553
195	qy 0.353553
196	qz 0.146447
197	zoom 1.0
198	xpan 0
199	ypan 0
200	}
201	set _arcball [blt::arcball create 100 100]
202	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
203	$_arcball quaternion $q
204
205	set _limits(vmin) 0.0
206	set _limits(vmax) 1.0
207	set _reset 1
208
209	array set _settings [subst {
210	$this-qw $_view(qw)
211	$this-qx $_view(qx)
212	$this-qy $_view(qy)
213	$this-qz $_view(qz)
214	$this-zoom $_view(zoom)
215	$this-xpan $_view(xpan)
216	$this-ypan $_view(ypan)
217	$this-volume 1
218	$this-xcutplane 0
219	$this-xcutposition 0
220	$this-ycutplane 0
221	$this-ycutposition 0
222	$this-zcutplane 0
223	$this-zcutposition 0
224	}]
225
226	itk_component add 3dview {
227	label $itk_component(plotarea).view -image $_image(plot) \
228	-highlightthickness 0 -borderwidth 0
229	} {
230	usual
231	ignore -highlightthickness -borderwidth -background
232	}
233	bind $itk_component(3dview) <Control-F1> [itcl::code $this ToggleConsole]
234
235	set f [$itk_component(main) component controls]
236	itk_component add reset {
237	button $f.reset -borderwidth 1 -padx 1 -pady 1 \
238	-highlightthickness 0 \
239	-image [Rappture::icon reset-view] \
240	-command [itcl::code $this Zoom reset]
241	} {
242	usual
243	ignore -highlightthickness
244	}
245	pack $itk_component(reset) -side top -padx 2 -pady 2
246	Rappture::Tooltip::for $itk_component(reset) "Reset the view to the default zoom level"
247
248	itk_component add zoomin {
249	button $f.zin -borderwidth 1 -padx 1 -pady 1 \
250	-highlightthickness 0 \
251	-image [Rappture::icon zoom-in] \
252	-command [itcl::code $this Zoom in]
253	} {
254	usual
255	ignore -highlightthickness
256	}
257	pack $itk_component(zoomin) -side top -padx 2 -pady 2
258	Rappture::Tooltip::for $itk_component(zoomin) "Zoom in"
259
260	itk_component add zoomout {
261	button $f.zout -borderwidth 1 -padx 1 -pady 1 \
262	-highlightthickness 0 \
263	-image [Rappture::icon zoom-out] \
264	-command [itcl::code $this Zoom out]
265	} {
266	usual
267	ignore -highlightthickness
268	}
269	pack $itk_component(zoomout) -side top -padx 2 -pady 2
270	Rappture::Tooltip::for $itk_component(zoomout) "Zoom out"
271
272	itk_component add volume {
273	Rappture::PushButton $f.volume \
274	-onimage [Rappture::icon volume-on] \
275	-offimage [Rappture::icon volume-off] \
276	-command [itcl::code $this AdjustSetting volume] \
277	-variable [itcl::scope _settings($this-volume)]
278	}
279	$itk_component(volume) select
280	Rappture::Tooltip::for $itk_component(volume) \
281	"Toggle the volume cloud on/off"
282	pack $itk_component(volume) -padx 2 -pady 2
283
284	if { [catch {
285	BuildViewTab
286	BuildVolumeTab
287	BuildCutplanesTab
288	BuildCameraTab
289	} errs] != 0 } {
290	global errorInfo
291	puts stderr "errs=$errs errorInfo=$errorInfo"
292	}
293
294	# Legend
295
296	set _image(legend) [image create photo]
297	itk_component add legend {
298	canvas $itk_component(plotarea).legend -height 50 -highlightthickness 0
299	} {
300	usual
301	ignore -highlightthickness
302	rename -background -plotbackground plotBackground Background
303	}
304	bind $itk_component(legend) <Configure> \
305	[itcl::code $this EventuallyResizeLegend]
306
307	# Hack around the Tk panewindow. The problem is that the requested
308	# size of the 3d view isn't set until an image is retrieved from
309	# the server. So the panewindow uses the tiny size.
310	set w 10000
311	pack forget $itk_component(3dview)
312	blt::table $itk_component(plotarea) \
313	0,0 $itk_component(3dview) -fill both -reqwidth $w \
314	1,0 $itk_component(legend) -fill x
315	blt::table configure $itk_component(plotarea) r1 -resize none
316
317	# Bindings for rotation via mouse
318	bind $itk_component(3dview) <ButtonPress-1> \
319	[itcl::code $this Rotate click %x %y]
320	bind $itk_component(3dview) <B1-Motion> \
321	[itcl::code $this Rotate drag %x %y]
322	bind $itk_component(3dview) <ButtonRelease-1> \
323	[itcl::code $this Rotate release %x %y]
324	bind $itk_component(3dview) <Configure> \
325	[itcl::code $this EventuallyResize %w %h]
326
327	# Bindings for panning via mouse
328	bind $itk_component(3dview) <ButtonPress-2> \
329	[itcl::code $this Pan click %x %y]
330	bind $itk_component(3dview) <B2-Motion> \
331	[itcl::code $this Pan drag %x %y]
332	bind $itk_component(3dview) <ButtonRelease-2> \
333	[itcl::code $this Pan release %x %y]
334
335	# Bindings for panning via keyboard
336	bind $itk_component(3dview) <KeyPress-Left> \
337	[itcl::code $this Pan set -10 0]
338	bind $itk_component(3dview) <KeyPress-Right> \
339	[itcl::code $this Pan set 10 0]
340	bind $itk_component(3dview) <KeyPress-Up> \
341	[itcl::code $this Pan set 0 -10]
342	bind $itk_component(3dview) <KeyPress-Down> \
343	[itcl::code $this Pan set 0 10]
344	bind $itk_component(3dview) <Shift-KeyPress-Left> \
345	[itcl::code $this Pan set -2 0]
346	bind $itk_component(3dview) <Shift-KeyPress-Right> \
347	[itcl::code $this Pan set 2 0]
348	bind $itk_component(3dview) <Shift-KeyPress-Up> \
349	[itcl::code $this Pan set 0 -2]
350	bind $itk_component(3dview) <Shift-KeyPress-Down> \
351	[itcl::code $this Pan set 0 2]
352
353	# Bindings for zoom via keyboard
354	bind $itk_component(3dview) <KeyPress-Prior> \
355	[itcl::code $this Zoom out]
356	bind $itk_component(3dview) <KeyPress-Next> \
357	[itcl::code $this Zoom in]
358
359	bind $itk_component(3dview) <Enter> "focus $itk_component(3dview)"
360
361	if {[string equal "x11" [tk windowingsystem]]} {
362	# Bindings for zoom via mouse
363	bind $itk_component(3dview) <4> [itcl::code $this Zoom out]
364	bind $itk_component(3dview) <5> [itcl::code $this Zoom in]
365	}
366
367	set _image(download) [image create photo]
368
369	eval itk_initialize $args
370
371	EnableWaitDialog 900
372	Connect
373	}
374
375	# ----------------------------------------------------------------------
376	# DESTRUCTOR
377	# ----------------------------------------------------------------------
378	itcl::body Rappture::NanovisViewer::destructor {} {
379	$_dispatcher cancel !rebuild
380	$_dispatcher cancel !send_transfunc
381	$_dispatcher cancel !resize
382	image delete $_image(plot)
383	image delete $_image(legend)
384	image delete $_image(download)
385	catch { blt::arcball destroy $_arcball }
386	array unset _settings $this-*
387	}
388
389	# ----------------------------------------------------------------------
390	# USAGE: add <dataobj> ?<settings>?
391	#
392	# Clients use this to add a data object to the plot. The optional
393	# <settings> are used to configure the plot. Allowed settings are
394	# -color, -brightness, -width, -linestyle, and -raise.
395	# ----------------------------------------------------------------------
396	itcl::body Rappture::NanovisViewer::add {dataobj {settings ""}} {
397	if { ![$dataobj isvalid] } {
398	return; # Object doesn't contain valid data.
399	}
400	array set params {
401	-color auto
402	-width 1
403	-linestyle solid
404	-brightness 0
405	-raise 0
406	-description ""
407	-param ""
408	}
409	array set params $settings
410
411	if {$params(-color) == "auto" \|\| $params(-color) == "autoreset"} {
412	# can't handle -autocolors yet
413	set params(-color) black
414	}
415	set pos [lsearch -exact $_dlist $dataobj]
416	if {$pos < 0} {
417	lappend _dlist $dataobj
418	set _allDataObjs($dataobj) 1
419	set _obj2ovride($dataobj-color) $params(-color)
420	set _obj2ovride($dataobj-width) $params(-width)
421	set _obj2ovride($dataobj-raise) $params(-raise)
422	$_dispatcher event -idle !rebuild
423	}
424	}
425
426	# ----------------------------------------------------------------------
427	# USAGE: get ?-objects?
428	# USAGE: get ?-image 3dview\|legend?
429	#
430	# Clients use this to query the list of objects being plotted, in
431	# order from bottom to top of this result. The optional "-image"
432	# flag can also request the internal images being shown.
433	# ----------------------------------------------------------------------
434	itcl::body Rappture::NanovisViewer::get {args} {
435	if {[llength $args] == 0} {
436	set args "-objects"
437	}
438
439	set op [lindex $args 0]
440	switch -- $op {
441	-objects {
442	# put the dataobj list in order according to -raise options
443	set dlist $_dlist
444	foreach obj $dlist {
445	if {[info exists _obj2ovride($obj-raise)] &&
446	$_obj2ovride($obj-raise)} {
447	set i [lsearch -exact $dlist $obj]
448	if {$i >= 0} {
449	set dlist [lreplace $dlist $i $i]
450	lappend dlist $obj
451	}
452	}
453	}
454	return $dlist
455	}
456	-image {
457	if {[llength $args] != 2} {
458	error "wrong # args: should be \"get -image 3dview\|legend\""
459	}
460	switch -- [lindex $args end] {
461	3dview {
462	return $_image(plot)
463	}
464	legend {
465	return $_image(legend)
466	}
467	default {
468	error "bad image name \"[lindex $args end]\": should be 3dview or legend"
469	}
470	}
471	}
472	default {
473	error "bad option \"$op\": should be -objects or -image"
474	}
475	}
476	}
477
478	# ----------------------------------------------------------------------
479	# USAGE: delete ?<dataobj1> <dataobj2> ...?
480	#
481	# Clients use this to delete a dataobj from the plot. If no dataobjs
482	# are specified, then all dataobjs are deleted. No data objects are
483	# deleted. They are only removed from the display list.
484	#
485	# ----------------------------------------------------------------------
486	itcl::body Rappture::NanovisViewer::delete {args} {
487	if {[llength $args] == 0} {
488	set args $_dlist
489	}
490	# Delete all specified dataobjs
491	set changed 0
492	foreach dataobj $args {
493	set pos [lsearch -exact $_dlist $dataobj]
494	if { $pos >= 0 } {
495	set _dlist [lreplace $_dlist $pos $pos]
496	array unset _limits $dataobj*
497	array unset _obj2ovride $dataobj-*
498	set changed 1
499	}
500	}
501	# If anything changed, then rebuild the plot
502	if {$changed} {
503	$_dispatcher event -idle !rebuild
504	}
505	}
506
507	# ----------------------------------------------------------------------
508	# USAGE: scale ?<data1> <data2> ...?
509	#
510	# Sets the default limits for the overall plot according to the
511	# limits of the data for all of the given <data> objects. This
512	# accounts for all objects--even those not showing on the screen.
513	# Because of this, the limits are appropriate for all objects as
514	# the user scans through data in the ResultSet viewer.
515	# ----------------------------------------------------------------------
516	itcl::body Rappture::NanovisViewer::scale {args} {
517	foreach val {xmin xmax ymin ymax zmin zmax vmin vmax} {
518	set _limits($val) ""
519	}
520	foreach dataobj $args {
521	if { ![$dataobj isvalid] } {
522	continue; # Object doesn't contain valid data.
523	}
524	foreach axis {x y z v} {
525	foreach { min max } [$dataobj limits $axis] break
526	if {"" != $min && "" != $max} {
527	if {"" == $_limits(${axis}min)} {
528	set _limits(${axis}min) $min
529	set _limits(${axis}max) $max
530	} else {
531	if {$min < $_limits(${axis}min)} {
532	set _limits(${axis}min) $min
533	}
534	if {$max > $_limits(${axis}max)} {
535	set _limits(${axis}max) $max
536	}
537	}
538	}
539	}
540	}
541	}
542
543	# ----------------------------------------------------------------------
544	# USAGE: download coming
545	# USAGE: download controls <downloadCommand>
546	# USAGE: download now
547	#
548	# Clients use this method to create a downloadable representation
549	# of the plot. Returns a list of the form {ext string}, where
550	# "ext" is the file extension (indicating the type of data) and
551	# "string" is the data itself.
552	# ----------------------------------------------------------------------
553	itcl::body Rappture::NanovisViewer::download {option args} {
554	switch $option {
555	coming {
556	if {[catch {
557	blt::winop snap $itk_component(plotarea) $_image(download)
558	}]} {
559	$_image(download) configure -width 1 -height 1
560	$_image(download) put #000000
561	}
562	}
563	controls {
564	# no controls for this download yet
565	return ""
566	}
567	now {
568	# Get the image data (as base64) and decode it back to binary.
569	# This is better than writing to temporary files. When we switch
570	# to the BLT picture image it won't be necessary to decode the
571	# image data.
572	if { [image width $_image(plot)] > 0 &&
573	[image height $_image(plot)] > 0 } {
574	set bytes [$_image(plot) data -format "jpeg -quality 100"]
575	set bytes [Rappture::encoding::decode -as b64 $bytes]
576	return [list .jpg $bytes]
577	}
578	return ""
579	}
580	default {
581	error "bad option \"$option\": should be coming, controls, now"
582	}
583	}
584	}
585
586	# ----------------------------------------------------------------------
587	# USAGE: Connect ?<host:port>,<host:port>...?
588	#
589	# Clients use this method to establish a connection to a new
590	# server, or to reestablish a connection to the previous server.
591	# Any existing connection is automatically closed.
592	# ----------------------------------------------------------------------
593	itcl::body Rappture::NanovisViewer::Connect {} {
594	set _hosts [GetServerList "nanovis"]
595	if { "" == $_hosts } {
596	return 0
597	}
598	set _reset 1
599	set result [VisViewer::Connect $_hosts]
600	if { $result } {
601	if { $_reportClientInfo } {
602	# Tell the server the viewer, hub, user and session.
603	# Do this immediately on connect before buffing any commands
604	global env
605
606	set info {}
607	set user "???"
608	if { [info exists env(USER)] } {
609	set user $env(USER)
610	}
611	set session "???"
612	if { [info exists env(SESSION)] } {
613	set session $env(SESSION)
614	}
615	lappend info "version" "$Rappture::version"
616	lappend info "build" "$Rappture::build"
617	lappend info "svnurl" "$Rappture::svnurl"
618	lappend info "installdir" "$Rappture::installdir"
619	lappend info "hub" [exec hostname]
620	lappend info "client" "nanovisviewer"
621	lappend info "user" $user
622	lappend info "session" $session
623	SendCmd "clientinfo [list $info]"
624	}
625
626	set w [winfo width $itk_component(3dview)]
627	set h [winfo height $itk_component(3dview)]
628	EventuallyResize $w $h
629	}
630	return $result
631	}
632
633	#
634	# isconnected --
635	#
636	# Indicates if we are currently connected to the visualization server.
637	#
638	itcl::body Rappture::NanovisViewer::isconnected {} {
639	return [VisViewer::IsConnected]
640	}
641
642	#
643	# disconnect --
644	#
645	itcl::body Rappture::NanovisViewer::disconnect {} {
646	Disconnect
647	}
648
649	#
650	# Disconnect --
651	#
652	# Clients use this method to disconnect from the current rendering
653	# server.
654	#
655	itcl::body Rappture::NanovisViewer::Disconnect {} {
656	VisViewer::Disconnect
657
658	# disconnected -- no more data sitting on server
659	array unset _serverDatasets
660	}
661
662	# ----------------------------------------------------------------------
663	# USAGE: SendTransferFuncs
664	# ----------------------------------------------------------------------
665	itcl::body Rappture::NanovisViewer::SendTransferFuncs {} {
666	if { $_first == "" } {
667	puts stderr "first not set"
668	return
669	}
670	# Ensure that the global opacity and thickness settings (in the slider
671	# settings widgets) are used for the active transfer-function. Update
672	# the values in the _settings varible.
673	set opacity [expr { double($_settings($this-opacity)) * 0.01 }]
674	# Scale values between 0.00001 and 0.01000
675	set thickness [expr {double($_settings($this-thickness)) * 0.0001}]
676
677	foreach tag [CurrentDatasets] {
678	if { ![info exists _serverDatasets($tag)] \|\| !$_serverDatasets($tag) } {
679	# The volume hasn't reached the server yet. How did we get
680	# here?
681	puts stderr "Don't have $tag in _serverDatasets"
682	continue
683	}
684	if { ![info exists _dataset2style($tag)] } {
685	puts stderr "don't have style for volume $tag"
686	continue; # How does this happen?
687	}
688	set tf $_dataset2style($tag)
689	set _settings($this-$tf-opacity) $opacity
690	set _settings($this-$tf-thickness) $thickness
691	ComputeTransferFunc $tf
692	# FIXME: Need to the send information as to what transfer functions
693	# to update so that we only update the transfer function
694	# as necessary. Right now, all transfer functions are
695	# updated. This makes moving the isomarker slider chunky.
696	if { ![info exists _activeTfs($tf)] \|\| !$_activeTfs($tf) } {
697	set _activeTfs($tf) 1
698	}
699	SendCmd "volume shading transfunc $tf $tag"
700	}
701	FixLegend
702	}
703
704	# ----------------------------------------------------------------------
705	# USAGE: ReceiveImage -bytes <size> -type <type> -token <token>
706	#
707	# Invoked automatically whenever the "image" command comes in from
708	# the rendering server. Indicates that binary image data with the
709	# specified <size> will follow.
710	# ----------------------------------------------------------------------
711	itcl::body Rappture::NanovisViewer::ReceiveImage { args } {
712	array set info {
713	-token "???"
714	-bytes 0
715	-type image
716	}
717	array set info $args
718	set bytes [ReceiveBytes $info(-bytes)]
719	ReceiveEcho <<line "<read $info(-bytes) bytes"
720	if { $info(-type) == "image" } {
721	ReceiveEcho "for [image width $_image(plot)]x[image height $_image(plot)] image>"
722	$_image(plot) configure -data $bytes
723	} elseif { $info(-type) == "print" } {
724	set tag $this-print-$info(-token)
725	set _hardcopy($tag) $bytes
726	}
727	}
728
729	#
730	# ReceiveLegend --
731	#
732	# The procedure is the response from the render server to each "legend"
733	# command. The server sends back a "legend" command invoked our
734	# the slave interpreter. The purpose is to collect data of the image
735	# representing the legend in the canvas. In addition, the isomarkers
736	# of the active transfer function are displayed.
737	#
738	# I don't know is this is the right place to display the isomarkers.
739	# I don't know all the different paths used to draw the plot. There's
740	# "Rebuild", "add", etc.
741	#
742	itcl::body Rappture::NanovisViewer::ReceiveLegend { tf vmin vmax size } {
743	if { ![isconnected] } {
744	return
745	}
746	set bytes [ReceiveBytes $size]
747	$_image(legend) configure -data $bytes
748	ReceiveEcho <<line "<read $size bytes for [image width $_image(legend)]x[image height $_image(legend)] legend>"
749
750	set c $itk_component(legend)
751	set w [winfo width $c]
752	set h [winfo height $c]
753	set lx 10
754	set ly [expr {$h - 1}]
755	if {"" == [$c find withtag transfunc]} {
756	$c create image 10 10 -anchor nw \
757	-image $_image(legend) -tags transfunc
758	$c create text $lx $ly -anchor sw \
759	-fill $itk_option(-plotforeground) -tags "limits vmin"
760	$c create text [expr {$w-$lx}] $ly -anchor se \
761	-fill $itk_option(-plotforeground) -tags "limits vmax"
762	$c lower transfunc
763	$c bind transfunc <ButtonRelease-1> \
764	[itcl::code $this AddIsoMarker %x %y]
765	}
766	# Display the markers used by the active transfer function.
767
768	array set limits [limits $tf]
769	$c itemconfigure vmin -text [format %.2g $limits(min)]
770	$c coords vmin $lx $ly
771
772	$c itemconfigure vmax -text [format %.2g $limits(max)]
773	$c coords vmax [expr {$w-$lx}] $ly
774
775	if { [info exists _isomarkers($tf)] } {
776	foreach m $_isomarkers($tf) {
777	$m visible yes
778	}
779	}
780
781	# The colormap may have changed. Resync the slicers with the colormap.
782	set datasets [CurrentDatasets -cutplanes]
783	SendCmd "volume data state $_settings($this-volume) $datasets"
784
785	# Adjust the cutplane for only the first component in the topmost volume
786	# (i.e. the first volume designated in the field).
787	set tag [lindex $datasets 0]
788	foreach axis {x y z} {
789	# Turn off cutplanes for all volumes
790	SendCmd "cutplane state 0 $axis"
791	if { $_settings($this-${axis}cutplane) } {
792	# Turn on cutplane for this particular volume and set the position
793	SendCmd "cutplane state 1 $axis $tag"
794	set pos [expr {0.01*$_settings($this-${axis}cutposition)}]
795	SendCmd "cutplane position $pos $axis $tag"
796	}
797	}
798	}
799
800	#
801	# ReceiveData --
802	#
803	# The procedure is the response from the render server to each "data
804	# follows" command. The server sends back a "data" command invoked our
805	# the slave interpreter. The purpose is to collect the min/max of the
806	# volume sent to the render server. Since the client (nanovisviewer)
807	# doesn't parse 3D data formats, we rely on the server (nanovis) to
808	# tell us what the limits are. Once we've received the limits to all
809	# the data we've sent (tracked by _recvdDatasets) we can then determine
810	# what the transfer functions are for these volumes.
811	#
812	#
813	# Note: There is a considerable tradeoff in having the server report
814	# back what the data limits are. It means that much of the code
815	# having to do with transfer-functions has to wait for the data
816	# to come back, since the isomarkers are calculated based upon
817	# the data limits. The client code is much messier because of
818	# this. The alternative is to parse any of the 3D formats on the
819	# client side.
820	#
821	itcl::body Rappture::NanovisViewer::ReceiveData { args } {
822	if { ![isconnected] } {
823	return
824	}
825
826	# Arguments from server are name value pairs. Stuff them in an array.
827	array set info $args
828
829	set tag $info(tag)
830	set parts [split $tag -]
831
832	#
833	# Volumes don't exist until we're told about them.
834	#
835	set dataobj [lindex $parts 0]
836	set _serverDatasets($tag) 1
837	if { $_settings($this-volume) && $dataobj == $_first } {
838	SendCmd "volume state 1 $tag"
839	}
840	set _limits($tag-min) $info(min); # Minimum value of the volume.
841	set _limits($tag-max) $info(max); # Maximum value of the volume.
842	set _limits(vmin) $info(vmin); # Overall minimum value.
843	set _limits(vmax) $info(vmax); # Overall maximum value.
844
845	unset _recvdDatasets($tag)
846	if { [array size _recvdDatasets] == 0 } {
847	# The active transfer function is by default the first component of
848	# the first data object. This assumes that the data is always
849	# successfully transferred.
850	updatetransferfuncs
851	}
852	}
853
854	# ----------------------------------------------------------------------
855	# USAGE: Rebuild
856	#
857	# Called automatically whenever something changes that affects the
858	# data in the widget. Clears any existing data and rebuilds the
859	# widget to display new data.
860	# ----------------------------------------------------------------------
861	itcl::body Rappture::NanovisViewer::Rebuild {} {
862	set w [winfo width $itk_component(3dview)]
863	set h [winfo height $itk_component(3dview)]
864	if { $w < 2 \|\| $h < 2 } {
865	update
866	$_dispatcher event -idle !rebuild
867	return
868	}
869
870	# Turn on buffering of commands to the server. We don't want to
871	# be preempted by a server disconnect/reconnect (which automatically
872	# generates a new call to Rebuild).
873	StartBufferingCommands
874
875	# Hide all the isomarkers. Can't remove them. Have to remember the
876	# settings since the user may have created/deleted/moved markers.
877
878	foreach tf [array names _isomarkers] {
879	foreach m $_isomarkers($tf) {
880	$m visible no
881	}
882	}
883
884	if { $_width != $w \|\| $_height != $h \|\| $_reset } {
885	set _width $w
886	set _height $h
887	$_arcball resize $w $h
888	DoResize
889	}
890	foreach dataobj [get] {
891	foreach cname [$dataobj components] {
892	set tag $dataobj-$cname
893	if { ![info exists _serverDatasets($tag)] } {
894	# Send the data as one huge base64-encoded mess -- yuck!
895	if { [$dataobj type] == "dx" } {
896	if { ![$dataobj isvalid] } {
897	puts stderr "??? $dataobj is invalid"
898	}
899	set data [$dataobj blob $cname]
900	} else {
901	set data [$dataobj vtkdata $cname]
902	if 0 {
903	set f [open "/tmp/volume.vtk" "w"]
904	puts $f $data
905	close $f
906	}
907	}
908	set nbytes [string length $data]
909	if { $_reportClientInfo } {
910	set info {}
911	lappend info "tool_id" [$dataobj hints toolid]
912	lappend info "tool_name" [$dataobj hints toolname]
913	lappend info "tool_title" [$dataobj hints tooltitle]
914	lappend info "tool_command" [$dataobj hints toolcommand]
915	lappend info "tool_revision" [$dataobj hints toolrevision]
916	lappend info "dataset_label" [$dataobj hints label]
917	lappend info "dataset_size" $nbytes
918	lappend info "dataset_tag" $tag
919	SendCmd "clientinfo [list $info]"
920	}
921	SendCmd "volume data follows $nbytes $tag"
922	append _outbuf $data
923	set _recvdDatasets($tag) 1
924	set _serverDatasets($tag) 0
925	}
926	NameTransferFunc $dataobj $cname
927	}
928	}
929	set _first [lindex [get] 0]
930	if { $_reset } {
931	#
932	# Reset the camera and other view parameters
933	#
934	set _settings($this-qw) $_view(qw)
935	set _settings($this-qx) $_view(qx)
936	set _settings($this-qy) $_view(qy)
937	set _settings($this-qz) $_view(qz)
938	set _settings($this-xpan) $_view(xpan)
939	set _settings($this-ypan) $_view(ypan)
940	set _settings($this-zoom) $_view(zoom)
941
942	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
943	$_arcball quaternion $q
944	SendCmd "camera orient $q"
945	SendCmd "camera reset"
946	PanCamera
947	SendCmd "camera zoom $_view(zoom)"
948	InitSettings light2side light transp isosurface grid axes
949
950	# Turn off cutplanes for all volumes
951	foreach axis {x y z} {
952	SendCmd "cutplane state 0 $axis"
953	}
954	if {"" != $_first} {
955	set axis [$_first hints updir]
956	if { "" != $axis } {
957	SendCmd "up $axis"
958	}
959	set location [$_first hints camera]
960	if { $location != "" } {
961	array set _view $location
962	}
963	}
964	}
965	# Outline seems to need to be reset every update.
966	InitSettings outline
967	# nothing to send -- activate the proper ivol
968	SendCmd "volume state 0"
969	if {"" != $_first} {
970	set datasets [array names _serverDatasets $_first-*]
971	if { $datasets != "" } {
972	SendCmd "volume state 1 $datasets"
973	}
974	# If the first volume already exists on the server, then make sure
975	# we display the proper transfer function in the legend.
976	set cname [lindex [$_first components] 0]
977	if { [info exists _serverDatasets($_first-$cname)] } {
978	updatetransferfuncs
979	}
980	}
981	# Actually write the commands to the server socket. If it fails, we don't
982	# care. We're finished here.
983	blt::busy hold $itk_component(hull)
984	StopBufferingCommands
985	blt::busy release $itk_component(hull)
986	set _reset 0
987	}
988
989	# ----------------------------------------------------------------------
990	# USAGE: CurrentDatasets ?-cutplanes?
991	#
992	# Returns a list of volume server IDs for the current volume being
993	# displayed. This is normally a single ID, but it might be a list
994	# of IDs if the current data object has multiple components.
995	# ----------------------------------------------------------------------
996	itcl::body Rappture::NanovisViewer::CurrentDatasets {{what -all}} {
997	set rlist ""
998	if { $_first == "" } {
999	return
1000	}
1001	foreach cname [$_first components] {
1002	set tag $_first-$cname
1003	if { [info exists _serverDatasets($tag)] && $_serverDatasets($tag) } {
1004	array set style {
1005	-cutplanes 1
1006	}
1007	array set style [lindex [$_first components -style $cname] 0]
1008	if { $what != "-cutplanes" \|\| $style(-cutplanes) } {
1009	lappend rlist $tag
1010	}
1011	}
1012	}
1013	return $rlist
1014	}
1015
1016	# ----------------------------------------------------------------------
1017	# USAGE: Zoom in
1018	# USAGE: Zoom out
1019	# USAGE: Zoom reset
1020	#
1021	# Called automatically when the user clicks on one of the zoom
1022	# controls for this widget. Changes the zoom for the current view.
1023	# ----------------------------------------------------------------------
1024	itcl::body Rappture::NanovisViewer::Zoom {option} {
1025	switch -- $option {
1026	"in" {
1027	set _view(zoom) [expr {$_view(zoom)*1.25}]
1028	set _settings($this-zoom) $_view(zoom)
1029	SendCmd "camera zoom $_view(zoom)"
1030	}
1031	"out" {
1032	set _view(zoom) [expr {$_view(zoom)*0.8}]
1033	set _settings($this-zoom) $_view(zoom)
1034	SendCmd "camera zoom $_view(zoom)"
1035	}
1036	"reset" {
1037	array set _view {
1038	qw 0.853553
1039	qx -0.353553
1040	qy 0.353553
1041	qz 0.146447
1042	zoom 1.0
1043	xpan 0
1044	ypan 0
1045	}
1046	if { $_first != "" } {
1047	set location [$_first hints camera]
1048	if { $location != "" } {
1049	array set _view $location
1050	}
1051	}
1052	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
1053	$_arcball quaternion $q
1054	SendCmd "camera orient $q"
1055	SendCmd "camera reset"
1056	set _settings($this-qw) $_view(qw)
1057	set _settings($this-qx) $_view(qx)
1058	set _settings($this-qy) $_view(qy)
1059	set _settings($this-qz) $_view(qz)
1060	set _settings($this-xpan) $_view(xpan)
1061	set _settings($this-ypan) $_view(ypan)
1062	set _settings($this-zoom) $_view(zoom)
1063	}
1064	}
1065	}
1066
1067	itcl::body Rappture::NanovisViewer::PanCamera {} {
1068	#set x [expr ($_view(xpan)) / $_limits(xrange)]
1069	#set y [expr ($_view(ypan)) / $_limits(yrange)]
1070	set x $_view(xpan)
1071	set y $_view(ypan)
1072	SendCmd "camera pan $x $y"
1073	}
1074
1075
1076	# ----------------------------------------------------------------------
1077	# USAGE: Rotate click <x> <y>
1078	# USAGE: Rotate drag <x> <y>
1079	# USAGE: Rotate release <x> <y>
1080	#
1081	# Called automatically when the user clicks/drags/releases in the
1082	# plot area. Moves the plot according to the user's actions.
1083	# ----------------------------------------------------------------------
1084	itcl::body Rappture::NanovisViewer::Rotate {option x y} {
1085	switch -- $option {
1086	click {
1087	$itk_component(3dview) configure -cursor fleur
1088	set _click(x) $x
1089	set _click(y) $y
1090	}
1091	drag {
1092	if {[array size _click] == 0} {
1093	Rotate click $x $y
1094	} else {
1095	set w [winfo width $itk_component(3dview)]
1096	set h [winfo height $itk_component(3dview)]
1097	if {$w <= 0 \|\| $h <= 0} {
1098	return
1099	}
1100
1101	if {[catch {
1102	# this fails sometimes for no apparent reason
1103	set dx [expr {double($x-$_click(x))/$w}]
1104	set dy [expr {double($y-$_click(y))/$h}]
1105	}]} {
1106	return
1107	}
1108
1109	set q [$_arcball rotate $x $y $_click(x) $_click(y)]
1110	foreach { _view(qw) _view(qx) _view(qy) _view(qz) } $q break
1111	set _settings($this-qw) $_view(qw)
1112	set _settings($this-qx) $_view(qx)
1113	set _settings($this-qy) $_view(qy)
1114	set _settings($this-qz) $_view(qz)
1115	SendCmd "camera orient $q"
1116
1117	set _click(x) $x
1118	set _click(y) $y
1119	}
1120	}
1121	release {
1122	Rotate drag $x $y
1123	$itk_component(3dview) configure -cursor ""
1124	catch {unset _click}
1125	}
1126	default {
1127	error "bad option \"$option\": should be click, drag, release"
1128	}
1129	}
1130	}
1131
1132	# ----------------------------------------------------------------------
1133	# USAGE: $this Pan click x y
1134	# $this Pan drag x y
1135	# $this Pan release x y
1136	#
1137	# Called automatically when the user clicks on one of the zoom
1138	# controls for this widget. Changes the zoom for the current view.
1139	# ----------------------------------------------------------------------
1140	itcl::body Rappture::NanovisViewer::Pan {option x y} {
1141	# Experimental stuff
1142	set w [winfo width $itk_component(3dview)]
1143	set h [winfo height $itk_component(3dview)]
1144	if { $option == "set" } {
1145	set x [expr $x / double($w)]
1146	set y [expr $y / double($h)]
1147	set _view(xpan) [expr $_view(xpan) + $x]
1148	set _view(ypan) [expr $_view(ypan) + $y]
1149	PanCamera
1150	set _settings($this-xpan) $_view(xpan)
1151	set _settings($this-ypan) $_view(ypan)
1152	return
1153	}
1154	if { $option == "click" } {
1155	set _click(x) $x
1156	set _click(y) $y
1157	$itk_component(3dview) configure -cursor hand1
1158	}
1159	if { $option == "drag" \|\| $option == "release" } {
1160	set dx [expr ($_click(x) - $x)/double($w)]
1161	set dy [expr ($_click(y) - $y)/double($h)]
1162	set _click(x) $x
1163	set _click(y) $y
1164	set _view(xpan) [expr $_view(xpan) - $dx]
1165	set _view(ypan) [expr $_view(ypan) - $dy]
1166	PanCamera
1167	set _settings($this-xpan) $_view(xpan)
1168	set _settings($this-ypan) $_view(ypan)
1169	}
1170	if { $option == "release" } {
1171	$itk_component(3dview) configure -cursor ""
1172	}
1173	}
1174
1175	# ----------------------------------------------------------------------
1176	# USAGE: InitSettings <what> ?<value>?
1177	#
1178	# Used internally to update rendering settings whenever parameters
1179	# change in the popup settings panel. Sends the new settings off
1180	# to the back end.
1181	# ----------------------------------------------------------------------
1182	itcl::body Rappture::NanovisViewer::InitSettings { args } {
1183	foreach arg $args {
1184	AdjustSetting $arg
1185	}
1186	}
1187
1188	# ----------------------------------------------------------------------
1189	# USAGE: AdjustSetting <what> ?<value>?
1190	#
1191	# Used internally to update rendering settings whenever parameters
1192	# change in the popup settings panel. Sends the new settings off
1193	# to the back end.
1194	# ----------------------------------------------------------------------
1195	itcl::body Rappture::NanovisViewer::AdjustSetting {what {value ""}} {
1196	if {![isconnected]} {
1197	return
1198	}
1199	switch -- $what {
1200	light {
1201	set val $_settings($this-light)
1202	set diffuse [expr {0.01*$val}]
1203	set ambient [expr {1.0-$diffuse}]
1204	set specularLevel 0.3
1205	set specularExp 90.0
1206	SendCmd "volume shading ambient $ambient"
1207	SendCmd "volume shading diffuse $diffuse"
1208	SendCmd "volume shading specularLevel $specularLevel"
1209	SendCmd "volume shading specularExp $specularExp"
1210	}
1211	light2side {
1212	set val $_settings($this-light2side)
1213	SendCmd "volume shading light2side $val"
1214	}
1215	transp {
1216	set val $_settings($this-transp)
1217	set sval [expr { 0.01 * double($val) }]
1218	SendCmd "volume shading opacity $sval"
1219	}
1220	opacity {
1221	set val $_settings($this-opacity)
1222	set sval [expr { 0.01 * double($val) }]
1223	foreach tf [array names _activeTfs] {
1224	set _settings($this-$tf-opacity) $sval
1225	set _activeTfs($tf) 0
1226	}
1227	updatetransferfuncs
1228	}
1229	thickness {
1230	if { [array names _activeTfs] > 0 } {
1231	set val $_settings($this-thickness)
1232	# Scale values between 0.00001 and 0.01000
1233	set sval [expr {0.0001*double($val)}]
1234	foreach tf [array names _activeTfs] {
1235	set _settings($this-$tf-thickness) $sval
1236	set _activeTfs($tf) 0
1237	}
1238	updatetransferfuncs
1239	}
1240	}
1241	"outline" {
1242	SendCmd "volume outline state $_settings($this-outline)"
1243	}
1244	"isosurface" {
1245	SendCmd "volume shading isosurface $_settings($this-isosurface)"
1246	}
1247	"colormap" {
1248	set color [$itk_component(colormap) value]
1249	set _settings(colormap) $color
1250	# Only set the colormap on the first volume. Ignore the others.
1251	#ResetColormap $color
1252	}
1253	"grid" {
1254	SendCmd "grid visible $_settings($this-grid)"
1255	}
1256	"axes" {
1257	SendCmd "axis visible $_settings($this-axes)"
1258	}
1259	"legend" {
1260	if { $_settings($this-legend) } {
1261	blt::table $itk_component(plotarea) \
1262	0,0 $itk_component(3dview) -fill both \
1263	1,0 $itk_component(legend) -fill x
1264	blt::table configure $itk_component(plotarea) r1 -resize none
1265	} else {
1266	blt::table forget $itk_component(legend)
1267	}
1268	}
1269	"volume" {
1270	set datasets [CurrentDatasets -cutplanes]
1271	SendCmd "volume data state $_settings($this-volume) $datasets"
1272	}
1273	"xcutplane" - "ycutplane" - "zcutplane" {
1274	set axis [string range $what 0 0]
1275	set bool $_settings($this-$what)
1276	set datasets [CurrentDatasets -cutplanes]
1277	set tag [lindex $datasets 0]
1278	SendCmd "cutplane state $bool $axis $tag"
1279	if { $bool } {
1280	$itk_component(${axis}CutScale) configure -state normal \
1281	-troughcolor white
1282	} else {
1283	$itk_component(${axis}CutScale) configure -state disabled \
1284	-troughcolor grey82
1285	}
1286	}
1287	default {
1288	error "don't know how to fix $what"
1289	}
1290	}
1291	}
1292
1293	# ----------------------------------------------------------------------
1294	# USAGE: FixLegend
1295	#
1296	# Used internally to update the legend area whenever it changes size
1297	# or when the field changes. Asks the server to send a new legend
1298	# for the current field.
1299	# ----------------------------------------------------------------------
1300	itcl::body Rappture::NanovisViewer::FixLegend {} {
1301	set _resizeLegendPending 0
1302	set lineht [font metrics $itk_option(-font) -linespace]
1303	set w [expr {$_width-20}]
1304	set h [expr {[winfo height $itk_component(legend)]-20-$lineht}]
1305	if {$w > 0 && $h > 0 && [array names _activeTfs] > 0 && $_first != "" } {
1306	set tag [lindex [CurrentDatasets] 0]
1307	if { [info exists _dataset2style($tag)] } {
1308	SendCmd "legend $_dataset2style($tag) $w $h"
1309	}
1310	} else {
1311	# Can't do this as this will remove the items associated with the
1312	# isomarkers.
1313
1314	#$itk_component(legend) delete all
1315	}
1316	}
1317
1318	#
1319	# NameTransferFunc --
1320	#
1321	# Creates a transfer function name based on the <style> settings in the
1322	# library run.xml file. This placeholder will be used later to create
1323	# and send the actual transfer function once the data info has been sent
1324	# to us by the render server. [We won't know the volume limits until the
1325	# server parses the 3D data and sends back the limits via ReceiveData.]
1326	#
1327	# FIXME: The current way we generate transfer-function names completely
1328	# ignores the -markers option. The problem is that we are forced
1329	# to compute the name from an increasing complex set of values:
1330	# color, levels, marker, opacity. I think we're stuck doing it
1331	# now.
1332	#
1333	itcl::body Rappture::NanovisViewer::NameTransferFunc { dataobj cname } {
1334	array set style {
1335	-color BCGYR
1336	-levels 6
1337	-opacity 1.0
1338	-markers ""
1339	}
1340	set tag $dataobj-$cname
1341	array set style [lindex [$dataobj components -style $cname] 0]
1342	set tf "$style(-color):$style(-levels):$style(-opacity)"
1343	set _dataset2style($tag) $tf
1344	lappend _style2datasets($tf) $tag
1345	return $tf
1346	}
1347
1348	#
1349	# ComputeTransferFunc --
1350	#
1351	# Computes and sends the transfer function to the render server. It's
1352	# assumed that the volume data limits are known and that the global
1353	# transfer-functions slider values have been set up. Both parts are
1354	# needed to compute the relative value (location) of the marker, and
1355	# the alpha map of the transfer function.
1356	#
1357	itcl::body Rappture::NanovisViewer::ComputeTransferFunc { tf } {
1358	array set style {
1359	-color BCGYR
1360	-levels 6
1361	-opacity 1.0
1362	-markers ""
1363	}
1364
1365	foreach {dataobj cname} [split [lindex $_style2datasets($tf) 0] -] break
1366	array set style [lindex [$dataobj components -style $cname] 0]
1367
1368	# We have to parse the style attributes for a volume using this
1369	# transfer-function once. This sets up the initial isomarkers for the
1370	# transfer function. The user may add/delete markers, so we have to
1371	# maintain a list of markers for each transfer-function. We use the one
1372	# of the volumes (the first in the list) using the transfer-function as a
1373	# reference.
1374	#
1375	# FIXME: The current way we generate transfer-function names completely
1376	# ignores the -markers option. The problem is that we are forced
1377	# to compute the name from an increasing complex set of values:
1378	# color, levels, marker, opacity. I think the cow's out of the
1379	# barn on this one.
1380
1381	if { ![info exists _isomarkers($tf)] } {
1382	# Have to defer creation of isomarkers until we have data limits
1383	if { [info exists style(-markers)] &&
1384	[llength $style(-markers)] > 0 } {
1385	ParseMarkersOption $tf $style(-markers)
1386	} else {
1387	ParseLevelsOption $tf $style(-levels)
1388	}
1389	}
1390	set cmap [ColorsToColormap $style(-color)]
1391	set tag $this-$tf
1392	if { ![info exists _settings($tag-opacity)] } {
1393	set _settings($tag-opacity) $style(-opacity)
1394	}
1395	set max 1.0 ;#$_settings($tag-opacity)
1396
1397	set isovalues {}
1398	foreach m $_isomarkers($tf) {
1399	lappend isovalues [$m relval]
1400	}
1401	# Sort the isovalues
1402	set isovalues [lsort -real $isovalues]
1403
1404	if { ![info exists _settings($tag-thickness)]} {
1405	set _settings($tag-thickness) 0.005
1406	}
1407	set delta $_settings($tag-thickness)
1408
1409	set first [lindex $isovalues 0]
1410	set last [lindex $isovalues end]
1411	set wmap ""
1412	if { $first == "" \|\| $first != 0.0 } {
1413	lappend wmap 0.0 0.0
1414	}
1415	foreach x $isovalues {
1416	set x1 [expr {$x-$delta-0.00001}]
1417	set x2 [expr {$x-$delta}]
1418	set x3 [expr {$x+$delta}]
1419	set x4 [expr {$x+$delta+0.00001}]
1420	if { $x1 < 0.0 } {
1421	set x1 0.0
1422	} elseif { $x1 > 1.0 } {
1423	set x1 1.0
1424	}
1425	if { $x2 < 0.0 } {
1426	set x2 0.0
1427	} elseif { $x2 > 1.0 } {
1428	set x2 1.0
1429	}
1430	if { $x3 < 0.0 } {
1431	set x3 0.0
1432	} elseif { $x3 > 1.0 } {
1433	set x3 1.0
1434	}
1435	if { $x4 < 0.0 } {
1436	set x4 0.0
1437	} elseif { $x4 > 1.0 } {
1438	set x4 1.0
1439	}
1440	# add spikes in the middle
1441	lappend wmap $x1 0.0
1442	lappend wmap $x2 $max
1443	lappend wmap $x3 $max
1444	lappend wmap $x4 0.0
1445	}
1446	if { $last == "" \|\| $last != 1.0 } {
1447	lappend wmap 1.0 0.0
1448	}
1449	SendCmd "transfunc define $tf { $cmap } { $wmap }"
1450	}
1451
1452	# ----------------------------------------------------------------------
1453	# CONFIGURATION OPTION: -plotbackground
1454	# ----------------------------------------------------------------------
1455	itcl::configbody Rappture::NanovisViewer::plotbackground {
1456	if { [isconnected] } {
1457	foreach {r g b} [Color2RGB $itk_option(-plotbackground)] break
1458	#fix this!
1459	#SendCmd "color background $r $g $b"
1460	}
1461	}
1462
1463	# ----------------------------------------------------------------------
1464	# CONFIGURATION OPTION: -plotforeground
1465	# ----------------------------------------------------------------------
1466	itcl::configbody Rappture::NanovisViewer::plotforeground {
1467	if { [isconnected] } {
1468	foreach {r g b} [Color2RGB $itk_option(-plotforeground)] break
1469	#fix this!
1470	#SendCmd "color background $r $g $b"
1471	}
1472	}
1473
1474	# ----------------------------------------------------------------------
1475	# CONFIGURATION OPTION: -plotoutline
1476	# ----------------------------------------------------------------------
1477	itcl::configbody Rappture::NanovisViewer::plotoutline {
1478	# Must check if we are connected because this routine is called from the
1479	# class body when the -plotoutline itk_option is defined. At that point
1480	# the NanovisViewer class constructor hasn't been called, so we can't
1481	# start sending commands to visualization server.
1482	if { [isconnected] } {
1483	if {"" == $itk_option(-plotoutline)} {
1484	SendCmd "volume outline state off"
1485	} else {
1486	SendCmd "volume outline state on"
1487	SendCmd "volume outline color [Color2RGB $itk_option(-plotoutline)]"
1488	}
1489	}
1490	}
1491
1492	#
1493	# The -levels option takes a single value that represents the number
1494	# of evenly distributed markers based on the current data range. Each
1495	# marker is a relative value from 0.0 to 1.0.
1496	#
1497	itcl::body Rappture::NanovisViewer::ParseLevelsOption { tf levels } {
1498	set c $itk_component(legend)
1499	regsub -all "," $levels " " levels
1500	if {[string is int $levels]} {
1501	for {set i 1} { $i <= $levels } {incr i} {
1502	set x [expr {double($i)/($levels+1)}]
1503	set m [Rappture::IsoMarker \#auto $c $this $tf]
1504	$m relval $x
1505	lappend _isomarkers($tf) $m
1506	}
1507	} else {
1508	foreach x $levels {
1509	set m [Rappture::IsoMarker \#auto $c $this $tf]
1510	$m relval $x
1511	lappend _isomarkers($tf) $m
1512	}
1513	}
1514	}
1515
1516	#
1517	# The -markers option takes a list of zero or more values (the values
1518	# may be separated either by spaces or commas) that have the following
1519	# format:
1520	#
1521	# N% Percent of current total data range. Converted to
1522	# to a relative value between 0.0 and 1.0.
1523	# N Absolute value of marker. If the marker is outside of
1524	# the current range, it will be displayed on the outer
1525	# edge of the legends, but it range it represents will
1526	# not be seen.
1527	#
1528	itcl::body Rappture::NanovisViewer::ParseMarkersOption { tf markers } {
1529	set c $itk_component(legend)
1530	regsub -all "," $markers " " markers
1531	foreach marker $markers {
1532	set n [scan $marker "%g%s" value suffix]
1533	if { $n == 2 && $suffix == "%" } {
1534	# ${n}% : Set relative value.
1535	set value [expr {$value * 0.01}]
1536	set m [Rappture::IsoMarker \#auto $c $this $tf]
1537	$m relval $value
1538	lappend _isomarkers($tf) $m
1539	} else {
1540	# ${n} : Set absolute value.
1541	set m [Rappture::IsoMarker \#auto $c $this $tf]
1542	$m absval $value
1543	lappend _isomarkers($tf) $m
1544	}
1545	}
1546	}
1547
1548	# ----------------------------------------------------------------------
1549	# USAGE: UndateTransferFuncs
1550	# ----------------------------------------------------------------------
1551	itcl::body Rappture::NanovisViewer::updatetransferfuncs {} {
1552	$_dispatcher event -idle !send_transfunc
1553	}
1554
1555	itcl::body Rappture::NanovisViewer::AddIsoMarker { x y } {
1556	if { $_first == "" } {
1557	error "active transfer function isn't set"
1558	}
1559	set tag [lindex [CurrentDatasets] 0]
1560	set tf $_dataset2style($tag)
1561	set c $itk_component(legend)
1562	set m [Rappture::IsoMarker \#auto $c $this $tf]
1563	set w [winfo width $c]
1564	$m relval [expr {double($x-10)/($w-20)}]
1565	lappend _isomarkers($tf) $m
1566	updatetransferfuncs
1567	return 1
1568	}
1569
1570	itcl::body Rappture::NanovisViewer::rmdupmarker { marker x } {
1571	set tf [$marker transferfunc]
1572	set bool 0
1573	if { [info exists _isomarkers($tf)] } {
1574	set list {}
1575	set marker [namespace tail $marker]
1576	foreach m $_isomarkers($tf) {
1577	set sx [$m screenpos]
1578	if { $m != $marker } {
1579	if { $x >= ($sx-3) && $x <= ($sx+3) } {
1580	$marker relval [$m relval]
1581	itcl::delete object $m
1582	bell
1583	set bool 1
1584	continue
1585	}
1586	}
1587	lappend list $m
1588	}
1589	set _isomarkers($tf) $list
1590	updatetransferfuncs
1591	}
1592	return $bool
1593	}
1594
1595	itcl::body Rappture::NanovisViewer::overmarker { marker x } {
1596	set tf [$marker transferfunc]
1597	if { [info exists _isomarkers($tf)] } {
1598	set marker [namespace tail $marker]
1599	foreach m $_isomarkers($tf) {
1600	set sx [$m screenpos]
1601	if { $m != $marker } {
1602	set bool [expr { $x >= ($sx-3) && $x <= ($sx+3) }]
1603	$m activate $bool
1604	}
1605	}
1606	}
1607	return ""
1608	}
1609
1610	itcl::body Rappture::NanovisViewer::limits { tf } {
1611	set _limits(min) 0.0
1612	set _limits(max) 1.0
1613	if { ![info exists _style2datasets($tf)] } {
1614	return [array get _limits]
1615	}
1616	set min ""; set max ""
1617	foreach tag $_style2datasets($tf) {
1618	if { ![info exists _serverDatasets($tag)] } {
1619	continue
1620	}
1621	if { ![info exists _limits($tag-min)] } {
1622	continue
1623	}
1624	if { $min == "" \|\| $min > $_limits($tag-min) } {
1625	set min $_limits($tag-min)
1626	}
1627	if { $max == "" \|\| $max < $_limits($tag-max) } {
1628	set max $_limits($tag-max)
1629	}
1630	}
1631	if { $min != "" } {
1632	set _limits(min) $min
1633	}
1634	if { $max != "" } {
1635	set _limits(max) $max
1636	}
1637	return [array get _limits]
1638	}
1639
1640
1641	itcl::body Rappture::NanovisViewer::BuildViewTab {} {
1642	foreach { key value } {
1643	grid 0
1644	axes 1
1645	outline 0
1646	volume 1
1647	legend 1
1648	particles 1
1649	lic 1
1650	} {
1651	set _settings($this-$key) $value
1652	}
1653
1654	set fg [option get $itk_component(hull) font Font]
1655	#set bfg [option get $itk_component(hull) boldFont Font]
1656
1657	set inner [$itk_component(main) insert end \
1658	-title "View Settings" \
1659	-icon [Rappture::icon wrench]]
1660	$inner configure -borderwidth 4
1661
1662	set ::Rappture::NanovisViewer::_settings($this-isosurface) 0
1663	checkbutton $inner.isosurface \
1664	-text "Isosurface shading" \
1665	-variable [itcl::scope _settings($this-isosurface)] \
1666	-command [itcl::code $this AdjustSetting isosurface] \
1667	-font "Arial 9"
1668
1669	checkbutton $inner.axes \
1670	-text "Axes" \
1671	-variable [itcl::scope _settings($this-axes)] \
1672	-command [itcl::code $this AdjustSetting axes] \
1673	-font "Arial 9"
1674
1675	checkbutton $inner.grid \
1676	-text "Grid" \
1677	-variable [itcl::scope _settings($this-grid)] \
1678	-command [itcl::code $this AdjustSetting grid] \
1679	-font "Arial 9"
1680
1681	checkbutton $inner.outline \
1682	-text "Outline" \
1683	-variable [itcl::scope _settings($this-outline)] \
1684	-command [itcl::code $this AdjustSetting outline] \
1685	-font "Arial 9"
1686
1687	checkbutton $inner.legend \
1688	-text "Legend" \
1689	-variable [itcl::scope _settings($this-legend)] \
1690	-command [itcl::code $this AdjustSetting legend] \
1691	-font "Arial 9"
1692
1693	checkbutton $inner.volume \
1694	-text "Volume" \
1695	-variable [itcl::scope _settings($this-volume)] \
1696	-command [itcl::code $this AdjustSetting volume] \
1697	-font "Arial 9"
1698
1699	blt::table $inner \
1700	0,0 $inner.axes -cspan 2 -anchor w \
1701	1,0 $inner.grid -cspan 2 -anchor w \
1702	2,0 $inner.outline -cspan 2 -anchor w \
1703	3,0 $inner.volume -cspan 2 -anchor w \
1704	4,0 $inner.legend -cspan 2 -anchor w
1705
1706	if 0 {
1707	bind $inner <Map> [itcl::code $this GetVolumeInfo $inner]
1708	}
1709	blt::table configure $inner r* -resize none
1710	blt::table configure $inner r5 -resize expand
1711	}
1712
1713	itcl::body Rappture::NanovisViewer::BuildVolumeTab {} {
1714	foreach { key value } {
1715	light2side 1
1716	light 40
1717	transp 50
1718	opacity 100
1719	thickness 350
1720	} {
1721	set _settings($this-$key) $value
1722	}
1723
1724	set inner [$itk_component(main) insert end \
1725	-title "Volume Settings" \
1726	-icon [Rappture::icon volume-on]]
1727	$inner configure -borderwidth 4
1728
1729	set fg [option get $itk_component(hull) font Font]
1730	#set bfg [option get $itk_component(hull) boldFont Font]
1731
1732	checkbutton $inner.vol -text "Show volume" -font $fg \
1733	-variable [itcl::scope _settings($this-volume)] \
1734	-command [itcl::code $this AdjustSetting volume]
1735	label $inner.shading -text "Shading:" -font $fg
1736
1737	checkbutton $inner.light2side -text "Two-sided lighting" -font $fg \
1738	-variable [itcl::scope _settings($this-light2side)] \
1739	-command [itcl::code $this AdjustSetting light2side]
1740
1741	label $inner.dim -text "Glow" -font $fg
1742	::scale $inner.light -from 0 -to 100 -orient horizontal \
1743	-variable [itcl::scope _settings($this-light)] \
1744	-width 10 \
1745	-showvalue off -command [itcl::code $this AdjustSetting light]
1746	label $inner.bright -text "Surface" -font $fg
1747
1748	label $inner.fog -text "Clear" -font $fg
1749	::scale $inner.transp -from 0 -to 100 -orient horizontal \
1750	-variable [itcl::scope _settings($this-transp)] \
1751	-width 10 \
1752	-showvalue off -command [itcl::code $this AdjustSetting transp]
1753	label $inner.plastic -text "Opaque" -font $fg
1754
1755	label $inner.clear -text "Clear" -font $fg
1756	::scale $inner.opacity -from 0 -to 100 -orient horizontal \
1757	-variable [itcl::scope _settings($this-opacity)] \
1758	-width 10 \
1759	-showvalue off -command [itcl::code $this AdjustSetting opacity]
1760	label $inner.opaque -text "Opaque" -font $fg
1761
1762	label $inner.thin -text "Thin" -font $fg
1763	::scale $inner.thickness -from 0 -to 1000 -orient horizontal \
1764	-variable [itcl::scope _settings($this-thickness)] \
1765	-width 10 \
1766	-showvalue off -command [itcl::code $this AdjustSetting thickness]
1767	label $inner.thick -text "Thick" -font $fg
1768
1769	label $inner.colormap_l -text "Colormap" -font "Arial 9"
1770	itk_component add colormap {
1771	Rappture::Combobox $inner.colormap -width 10 -editable no
1772	}
1773
1774	$inner.colormap choices insert end [GetColormapList -includeNone]
1775	$itk_component(colormap) value "BCGYR"
1776	bind $inner.colormap <<Value>> \
1777	[itcl::code $this AdjustSetting colormap]
1778
1779	blt::table $inner \
1780	0,0 $inner.vol -cspan 4 -anchor w -pady 2 \
1781	1,0 $inner.shading -cspan 4 -anchor w -pady {10 2} \
1782	2,0 $inner.light2side -cspan 4 -anchor w -pady 2 \
1783	3,0 $inner.dim -anchor e -pady 2 \
1784	3,1 $inner.light -cspan 2 -pady 2 -fill x \
1785	3,3 $inner.bright -anchor w -pady 2 \
1786	4,0 $inner.fog -anchor e -pady 2 \
1787	4,1 $inner.transp -cspan 2 -pady 2 -fill x \
1788	4,3 $inner.plastic -anchor w -pady 2 \
1789	5,0 $inner.thin -anchor e -pady 2 \
1790	5,1 $inner.thickness -cspan 2 -pady 2 -fill x\
1791	5,3 $inner.thick -anchor w -pady 2
1792
1793	blt::table configure $inner c0 c1 c3 r* -resize none
1794	blt::table configure $inner r6 -resize expand
1795	}
1796
1797	itcl::body Rappture::NanovisViewer::BuildCutplanesTab {} {
1798	set inner [$itk_component(main) insert end \
1799	-title "Cutplane Settings" \
1800	-icon [Rappture::icon cutbutton]]
1801	$inner configure -borderwidth 4
1802
1803	# X-value slicer...
1804	itk_component add xCutButton {
1805	Rappture::PushButton $inner.xbutton \
1806	-onimage [Rappture::icon x-cutplane] \
1807	-offimage [Rappture::icon x-cutplane] \
1808	-command [itcl::code $this AdjustSetting xcutplane] \
1809	-variable [itcl::scope _settings($this-xcutplane)]
1810	}
1811	Rappture::Tooltip::for $itk_component(xCutButton) \
1812	"Toggle the X cut plane on/off"
1813
1814	itk_component add xCutScale {
1815	::scale $inner.xval -from 100 -to 0 \
1816	-width 10 -orient vertical -showvalue off \
1817	-borderwidth 1 -highlightthickness 0 \
1818	-command [itcl::code $this Slice move x] \
1819	-variable [itcl::scope _settings($this-xcutposition)]
1820	} {
1821	usual
1822	ignore -borderwidth -highlightthickness
1823	}
1824	# Set the default cutplane value before disabling the scale.
1825	$itk_component(xCutScale) set 50
1826	$itk_component(xCutScale) configure -state disabled
1827	Rappture::Tooltip::for $itk_component(xCutScale) \
1828	"@[itcl::code $this SlicerTip x]"
1829
1830	# Y-value slicer...
1831	itk_component add yCutButton {
1832	Rappture::PushButton $inner.ybutton \
1833	-onimage [Rappture::icon y-cutplane] \
1834	-offimage [Rappture::icon y-cutplane] \
1835	-command [itcl::code $this AdjustSetting ycutplane] \
1836	-variable [itcl::scope _settings($this-ycutplane)]
1837	}
1838	Rappture::Tooltip::for $itk_component(yCutButton) \
1839	"Toggle the Y cut plane on/off"
1840
1841	itk_component add yCutScale {
1842	::scale $inner.yval -from 100 -to 0 \
1843	-width 10 -orient vertical -showvalue off \
1844	-borderwidth 1 -highlightthickness 0 \
1845	-command [itcl::code $this Slice move y] \
1846	-variable [itcl::scope _settings($this-ycutposition)]
1847	} {
1848	usual
1849	ignore -borderwidth -highlightthickness
1850	}
1851	Rappture::Tooltip::for $itk_component(yCutScale) \
1852	"@[itcl::code $this SlicerTip y]"
1853	# Set the default cutplane value before disabling the scale.
1854	$itk_component(yCutScale) set 50
1855	$itk_component(yCutScale) configure -state disabled
1856
1857	# Z-value slicer...
1858	itk_component add zCutButton {
1859	Rappture::PushButton $inner.zbutton \
1860	-onimage [Rappture::icon z-cutplane] \
1861	-offimage [Rappture::icon z-cutplane] \
1862	-command [itcl::code $this AdjustSetting zcutplane] \
1863	-variable [itcl::scope _settings($this-zcutplane)]
1864	}
1865	Rappture::Tooltip::for $itk_component(zCutButton) \
1866	"Toggle the Z cut plane on/off"
1867
1868	itk_component add zCutScale {
1869	::scale $inner.zval -from 100 -to 0 \
1870	-width 10 -orient vertical -showvalue off \
1871	-borderwidth 1 -highlightthickness 0 \
1872	-command [itcl::code $this Slice move z] \
1873	-variable [itcl::scope _settings($this-zcutposition)]
1874	} {
1875	usual
1876	ignore -borderwidth -highlightthickness
1877	}
1878	$itk_component(zCutScale) set 50
1879	$itk_component(zCutScale) configure -state disabled
1880	#$itk_component(zCutScale) configure -state disabled
1881	Rappture::Tooltip::for $itk_component(zCutScale) \
1882	"@[itcl::code $this SlicerTip z]"
1883
1884	blt::table $inner \
1885	1,1 $itk_component(xCutButton) \
1886	1,2 $itk_component(yCutButton) \
1887	1,3 $itk_component(zCutButton) \
1888	0,1 $itk_component(xCutScale) \
1889	0,2 $itk_component(yCutScale) \
1890	0,3 $itk_component(zCutScale)
1891
1892	blt::table configure $inner r0 r1 c* -resize none
1893	blt::table configure $inner r2 c4 -resize expand
1894	blt::table configure $inner c0 -width 2
1895	blt::table configure $inner c1 c2 c3 -padx 2
1896	}
1897
1898	itcl::body Rappture::NanovisViewer::BuildCameraTab {} {
1899	set inner [$itk_component(main) insert end \
1900	-title "Camera Settings" \
1901	-icon [Rappture::icon camera]]
1902	$inner configure -borderwidth 4
1903
1904	label $inner.view_l -text "view" -font "Arial 9"
1905	set f [frame $inner.view]
1906	foreach side { front back left right top bottom } {
1907	button $f.$side -image [Rappture::icon view$side] \
1908	-command [itcl::code $this SetOrientation $side]
1909	Rappture::Tooltip::for $f.$side "Change the view to $side"
1910	pack $f.$side -side left
1911	}
1912
1913	blt::table $inner \
1914	0,0 $inner.view_l -anchor e -pady 2 \
1915	0,1 $inner.view -anchor w -pady 2
1916
1917	set row 1
1918	set labels { qw qx qy qz xpan ypan zoom }
1919	foreach tag $labels {
1920	label $inner.${tag}label -text $tag -font "Arial 9"
1921	entry $inner.${tag} -font "Arial 9" -bg white \
1922	-textvariable [itcl::scope _settings($this-$tag)]
1923	bind $inner.${tag} <Return> \
1924	[itcl::code $this camera set ${tag}]
1925	bind $inner.${tag} <KP_Enter> \
1926	[itcl::code $this camera set ${tag}]
1927	blt::table $inner \
1928	$row,0 $inner.${tag}label -anchor e -pady 2 \
1929	$row,1 $inner.${tag} -anchor w -pady 2
1930	blt::table configure $inner r$row -resize none
1931	incr row
1932	}
1933
1934	blt::table configure $inner c* r* -resize none
1935	blt::table configure $inner c2 -resize expand
1936	blt::table configure $inner r$row -resize expand
1937	}
1938
1939	# ----------------------------------------------------------------------
1940	# USAGE: Slice move x\|y\|z <newval>
1941	#
1942	# Called automatically when the user drags the slider to move the
1943	# cut plane that slices 3D data. Gets the current value from the
1944	# slider and moves the cut plane to the appropriate point in the
1945	# data set.
1946	# ----------------------------------------------------------------------
1947	itcl::body Rappture::NanovisViewer::Slice {option args} {
1948	switch -- $option {
1949	move {
1950	if {[llength $args] != 2} {
1951	error "wrong # args: should be \"Slice move x\|y\|z newval\""
1952	}
1953	set axis [lindex $args 0]
1954	set newval [lindex $args 1]
1955
1956	set newpos [expr {0.01*$newval}]
1957	set datasets [CurrentDatasets -cutplanes]
1958	set tag [lindex $datasets 0]
1959	SendCmd "cutplane position $newpos $axis $tag"
1960	}
1961	default {
1962	error "bad option \"$option\": should be axis, move, or volume"
1963	}
1964	}
1965	}
1966
1967	# ----------------------------------------------------------------------
1968	# USAGE: SlicerTip <axis>
1969	#
1970	# Used internally to generate a tooltip for the x/y/z slicer controls.
1971	# Returns a message that includes the current slicer value.
1972	# ----------------------------------------------------------------------
1973	itcl::body Rappture::NanovisViewer::SlicerTip {axis} {
1974	set val [$itk_component(${axis}CutScale) get]
1975	# set val [expr {0.01*($val-50)
1976	# *($_limits(${axis}max)-$_limits(${axis}min))
1977	# + 0.5*($_limits(${axis}max)+$_limits(${axis}min))}]
1978	return "Move the [string toupper $axis] cut plane.\nCurrently: $axis = $val%"
1979	}
1980
1981
1982	itcl::body Rappture::NanovisViewer::DoResize {} {
1983	$_arcball resize $_width $_height
1984	SendCmd "screen size $_width $_height"
1985	set _resizePending 0
1986	}
1987
1988	itcl::body Rappture::NanovisViewer::EventuallyResize { w h } {
1989	set _width $w
1990	set _height $h
1991	$_arcball resize $w $h
1992	if { !$_resizePending } {
1993	$_dispatcher event -idle !resize
1994	set _resizePending 1
1995	}
1996	}
1997
1998	itcl::body Rappture::NanovisViewer::EventuallyResizeLegend {} {
1999	if { !$_resizeLegendPending } {
2000	$_dispatcher event -idle !legend
2001	set _resizeLegendPending 1
2002	}
2003	}
2004
2005	# camera --
2006	#
2007	itcl::body Rappture::NanovisViewer::camera {option args} {
2008	switch -- $option {
2009	"show" {
2010	puts [array get _view]
2011	}
2012	"set" {
2013	set who [lindex $args 0]
2014	set x $_settings($this-$who)
2015	set code [catch { string is double $x } result]
2016	if { $code != 0 \|\| !$result } {
2017	set _settings($this-$who) $_view($who)
2018	return
2019	}
2020	switch -- $who {
2021	"xpan" - "ypan" {
2022	set _view($who) $_settings($this-$who)
2023	PanCamera
2024	}
2025	"qx" - "qy" - "qz" - "qw" {
2026	set _view($who) $_settings($this-$who)
2027	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
2028	$_arcball quaternion $q
2029	SendCmd "camera orient $q"
2030	}
2031	"zoom" {
2032	set _view($who) $_settings($this-$who)
2033	SendCmd "camera zoom $_view(zoom)"
2034	}
2035	}
2036	}
2037	}
2038	}
2039
2040	itcl::body Rappture::NanovisViewer::GetVolumeInfo { w } {
2041	set flowobj ""
2042	foreach key [array names _obj2flow] {
2043	set flowobj $_obj2flow($key)
2044	break
2045	}
2046	if { $flowobj == "" } {
2047	return
2048	}
2049	if { [winfo exists $w.frame] } {
2050	destroy $w.frame
2051	}
2052	set inner [frame $w.frame]
2053	blt::table $w \
2054	5,0 $inner -fill both -cspan 2 -anchor nw
2055	array set hints [$dataobj hints]
2056
2057	label $inner.volumes -text "Volumes" -font "Arial 9 bold"
2058	blt::table $inner \
2059	1,0 $inner.volumes -anchor w \
2060	blt::table configure $inner c0 c1 -resize none
2061	blt::table configure $inner c2 -resize expand
2062
2063	set row 3
2064	set volumes [get]
2065	if { [llength $volumes] > 0 } {
2066	blt::table $inner $row,0 $inner.volumes -anchor w
2067	incr row
2068	}
2069	foreach vol $volumes {
2070	array unset info
2071	array set info $vol
2072	set name $info(name)
2073	if { ![info exists _settings($this-volume-$name)] } {
2074	set _settings($this-volume-$name) $info(hide)
2075	}
2076	checkbutton $inner.vol$row -text $info(label) \
2077	-variable [itcl::scope _settings($this-volume-$name)] \
2078	-onvalue 0 -offvalue 1 \
2079	-command [itcl::code $this volume $key $name] \
2080	-font "Arial 9"
2081	Rappture::Tooltip::for $inner.vol$row $info(description)
2082	blt::table $inner $row,0 $inner.vol$row -anchor w
2083	if { !$_settings($this-volume-$name) } {
2084	$inner.vol$row select
2085	}
2086	incr row
2087	}
2088	blt::table configure $inner r* -resize none
2089	blt::table configure $inner r$row -resize expand
2090	blt::table configure $inner c3 -resize expand
2091	event generate [winfo parent [winfo parent $w]] <Configure>
2092	}
2093
2094	itcl::body Rappture::NanovisViewer::volume { tag name } {
2095	set bool $_settings($this-volume-$name)
2096	SendCmd "volume statue $bool $name"
2097	}
2098
2099	itcl::body Rappture::NanovisViewer::SetOrientation { side } {
2100	array set positions {
2101	front "1 0 0 0"
2102	back "0 0 1 0"
2103	left "0.707107 0 -0.707107 0"
2104	right "0.707107 0 0.707107 0"
2105	top "0.707107 -0.707107 0 0"
2106	bottom "0.707107 0.707107 0 0"
2107	}
2108	foreach name { qw qx qy qz } value $positions($side) {
2109	set _view($name) $value
2110	}
2111	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
2112	$_arcball quaternion $q
2113	SendCmd "camera orient $q"
2114	SendCmd "camera reset"
2115	set _view(xpan) 0
2116	set _view(ypan) 0
2117	set _view(zoom) 1.0
2118	set _settings($this-xpan) $_view(xpan)
2119	set _settings($this-ypan) $_view(ypan)
2120	set _settings($this-zoom) $_view(zoom)
2121	}
2122

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