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source: branches/blt4/gui/scripts/flowvisviewer.tcl @ 1725

Last change on this file since 1725 was 1725, checked in by gah, 14 years ago

File size: 93.6 KB

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1
2	# ----------------------------------------------------------------------
3	# COMPONENT: flowvisviewer - 3D flow rendering
4	#
5	#
6	# This widget performs volume and flow rendering on 3D scalar/vector datasets.
7	# It connects to the Flowvis server running on a rendering farm, transmits
8	# data, and displays the results.
9	#
10	# ======================================================================
11	# AUTHOR: Michael McLennan, Purdue University
12	# Copyright (c) 2004-2005 Purdue Research Foundation
13	#
14	# See the file "license.terms" for information on usage and redistribution of
15	# this file, and for a DISCLAIMER OF ALL WARRANTIES.
16	# ======================================================================
17	package require Itk
18	package require BLT
19	#package require Img
20
21	option add *FlowvisViewer.width 5i widgetDefault
22	option add FlowvisViewercursor crosshair widgetDefault
23	option add *FlowvisViewer.height 4i widgetDefault
24	option add *FlowvisViewer.foreground black widgetDefault
25	option add *FlowvisViewer.controlBackground gray widgetDefault
26	option add *FlowvisViewer.controlDarkBackground #999999 widgetDefault
27	option add *FlowvisViewer.plotBackground black widgetDefault
28	option add *FlowvisViewer.plotForeground white widgetDefault
29	option add *FlowvisViewer.plotOutline gray widgetDefault
30	option add *FlowvisViewer.font \
31	--helvetica-medium-r-normal--12-* widgetDefault
32
33	# must use this name -- plugs into Rappture::resources::load
34	proc FlowvisViewer_init_resources {} {
35	Rappture::resources::register \
36	nanovis_server Rappture::FlowvisViewer::SetServerList
37	}
38
39	itcl::class Rappture::FlowvisViewer {
40	inherit Rappture::VisViewer
41
42	itk_option define -plotforeground plotForeground Foreground ""
43	itk_option define -plotbackground plotBackground Background ""
44	itk_option define -plotoutline plotOutline PlotOutline ""
45
46	constructor { hostlist args } {
47	Rappture::VisViewer::constructor $hostlist
48	} {
49	# defined below
50	}
51	destructor {
52	# defined below
53	}
54	public proc SetServerList { namelist } {
55	Rappture::VisViewer::SetServerList "nanovis" $namelist
56	}
57	public method add {dataobj {settings ""}}
58	public method camera {option args}
59	public method delete {args}
60	public method disconnect {}
61	public method download {option args}
62	public method flow {option}
63	public method get {args}
64	public method isconnected {}
65	public method limits { tf }
66	public method overmarker { m x }
67	public method parameters {title args} {
68	# do nothing
69	}
70	public method rmdupmarker { m x }
71	public method scale {args}
72	public method sendto { cmd }
73	public method updatetransferfuncs {}
74
75	protected method Connect {}
76	protected method CurrentVolumeIds {{what -all}}
77	protected method Disconnect {}
78	protected method Resize {}
79	protected method ResizeLegend {}
80	protected method FixSettings {what {value ""}}
81	protected method Pan {option x y}
82	protected method Rebuild {}
83	protected method ReceiveData { args }
84	protected method ReceiveImage { args }
85	protected method ReceiveLegend { tf vmin vmax size }
86	protected method Rotate {option x y}
87	protected method SendCmd {string}
88	protected method SendDataObjs {}
89	protected method SendTransferFuncs {}
90	protected method Slice {option args}
91	protected method SlicerTip {axis}
92	protected method Zoom {option}
93
94	# soon to be removed.
95	protected method Flow {option args}
96	protected method Play {}
97	protected method Pause {}
98
99
100	# The following methods are only used by this class.
101
102	private method AddIsoMarker { x y }
103	private method BuildCameraTab {}
104	private method BuildCutplanesTab {}
105	private method BuildViewTab {}
106	private method BuildVolumeTab {}
107	private method ComputeTransferFunc { tf }
108	private method EventuallyResize { w h }
109	private method EventuallyGoto { nSteps }
110	private method EventuallyResizeLegend { }
111	private method FlowCmd { dataobj comp nbytes extents }
112	private method GetMovie { widget width height }
113	private method GetPngImage { widget width height }
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 WaitIcon { option widget }
119	private method str2millisecs { value }
120	private method millisecs2str { value }
121	private method GetFlowInfo { widget }
122	private method particles { tag name }
123	private method box { tag name }
124	private method streams { tag name }
125	private method arrows { tag name }
126
127	private variable _outbuf ;# buffer for outgoing commands
128
129	private variable _dlist "" ;# list of data objects
130	private variable _allDataObjs
131	private variable _obj2ovride ;# maps dataobj => style override
132	private variable _serverObjs ;# maps dataobj-component to volume ID
133	# in the server
134	private variable _sendobjs "" ;# list of data objs to send to server
135	private variable _recvObjs ;# list of data objs to send to server
136	private variable _obj2style ;# maps dataobj-component to transfunc
137	private variable _style2objs ;# maps tf back to list of
138	# dataobj-components using the tf.
139	private variable _obj2flow; # Maps dataobj-component to a flow.
140
141	private variable _click ;# info used for rotate operations
142	private variable _limits ;# autoscale min/max for all axes
143	private variable _view ;# view params for 3D view
144	private variable _isomarkers ;# array of isosurface level values 0..1
145	private common _settings
146	private variable _activeTf "" ;# The currently active transfer function.
147	private variable _first "" ;# This is the topmost volume.
148	private variable _buffering 0
149	private variable _nextToken 0
150	private variable _icon 0
151	private variable _flow
152	# This
153	# indicates which isomarkers and transfer
154	# function to use when changing markers,
155	# opacity, or thickness.
156	private common _downloadPopup ;# download options from popup
157
158	private common _hardcopy
159	private variable _width 0
160	private variable _height 0
161	private variable _resizePending 0
162	private variable _resizeLegendPending 0
163	private variable _gotoPending 0
164	}
165
166	itk::usual FlowvisViewer {
167	keep -background -foreground -cursor -font
168	keep -plotbackground -plotforeground
169	}
170
171	itk::usual TkPushbutton {
172	}
173
174	# ----------------------------------------------------------------------
175	# CONSTRUCTOR
176	# ----------------------------------------------------------------------
177	itcl::body Rappture::FlowvisViewer::constructor { hostlist args } {
178
179	# Draw legend event
180	$_dispatcher register !legend
181	$_dispatcher dispatch $this !legend "[itcl::code $this ResizeLegend]; list"
182
183	# Send dataobjs event
184	$_dispatcher register !send_dataobjs
185	$_dispatcher dispatch $this !send_dataobjs \
186	"[itcl::code $this SendDataObjs]; list"
187
188	# Send transferfunctions event
189	$_dispatcher register !send_transfunc
190	$_dispatcher dispatch $this !send_transfunc \
191	"[itcl::code $this SendTransferFuncs]; list"
192
193	# Rebuild event.
194	$_dispatcher register !rebuild
195	$_dispatcher dispatch $this !rebuild "[itcl::code $this Rebuild]; list"
196
197	# Resize event.
198	$_dispatcher register !resize
199	$_dispatcher dispatch $this !resize "[itcl::code $this Resize]; list"
200
201	$_dispatcher register !play
202	$_dispatcher dispatch $this !play "[itcl::code $this flow next]; list"
203
204	# Draw legend event
205	$_dispatcher register !goto
206	$_dispatcher dispatch $this !goto "[itcl::code $this flow goto2]; list"
207
208	$_dispatcher register !movietimeout
209	$_dispatcher register !waiticon
210
211	set _flow(state) 0
212
213	set _outbuf ""
214
215	array set _downloadPopup {
216	format draft
217	}
218	#
219	# Populate parser with commands handle incoming requests
220	#
221	$_parser alias image [itcl::code $this ReceiveImage]
222	$_parser alias legend [itcl::code $this ReceiveLegend]
223	$_parser alias data [itcl::code $this ReceiveData]
224
225	# Initialize the view to some default parameters.
226	array set _view {
227	theta 45
228	phi 45
229	psi 0
230	zoom 1.0
231	pan-x 0
232	pan-y 0
233	}
234	set _limits(vmin) 0.0
235	set _limits(vmax) 1.0
236
237	array set _settings [subst {
238	$this-arrows 0
239	$this-currenttime 0
240	$this-duration 1:00
241	$this-loop 0
242	$this-pan-x $_view(pan-x)
243	$this-pan-y $_view(pan-y)
244	$this-phi $_view(phi)
245	$this-play 0
246	$this-psi $_view(psi)
247	$this-speed 500
248	$this-step 0
249	$this-streams 0
250	$this-theta $_view(theta)
251	$this-volume 1
252	$this-xcutplane 0
253	$this-xcutposition 0
254	$this-ycutplane 0
255	$this-ycutposition 0
256	$this-zcutplane 0
257	$this-zcutposition 0
258	$this-zoom $_view(zoom)
259	}]
260
261	itk_component add 3dview {
262	label $itk_component(plotarea).vol -image $_image(plot) \
263	-highlightthickness 0 -borderwidth 0
264	} {
265	usual
266	ignore -highlightthickness -borderwidth -background
267	}
268	set f [$itk_component(main) component controls]
269	itk_component add reset {
270	button $f.reset -borderwidth 1 -padx 1 -pady 1 \
271	-highlightthickness 0 \
272	-image [Rappture::icon reset-view] \
273	-command [itcl::code $this Zoom reset]
274	} {
275	usual
276	ignore -highlightthickness
277	}
278	pack $itk_component(reset) -side top -padx 2 -pady 2
279	Rappture::Tooltip::for $itk_component(reset) "Reset the view to the default zoom level"
280
281	itk_component add zoomin {
282	button $f.zin -borderwidth 1 -padx 1 -pady 1 \
283	-highlightthickness 0 \
284	-image [Rappture::icon zoom-in] \
285	-command [itcl::code $this Zoom in]
286	} {
287	usual
288	ignore -highlightthickness
289	}
290	pack $itk_component(zoomin) -side top -padx 2 -pady 2
291	Rappture::Tooltip::for $itk_component(zoomin) "Zoom in"
292
293	itk_component add zoomout {
294	button $f.zout -borderwidth 1 -padx 1 -pady 1 \
295	-highlightthickness 0 \
296	-image [Rappture::icon zoom-out] \
297	-command [itcl::code $this Zoom out]
298	} {
299	usual
300	ignore -highlightthickness
301	}
302	pack $itk_component(zoomout) -side top -padx 2 -pady 2
303	Rappture::Tooltip::for $itk_component(zoomout) "Zoom out"
304
305	itk_component add volume {
306	blt::tk::pushbutton $f.volume \
307	-onimage [Rappture::icon volume-on] \
308	-offimage [Rappture::icon volume-off] \
309	-command [itcl::code $this FixSettings volume] \
310	-variable [itcl::scope _settings($this-volume)]
311	}
312	$itk_component(volume) select
313	Rappture::Tooltip::for $itk_component(volume) \
314	"Toggle the volume cloud on/off"
315	pack $itk_component(volume) -padx 2 -pady 2
316
317	BuildViewTab
318	BuildVolumeTab
319	BuildCutplanesTab
320	BuildCameraTab
321
322	bind $itk_component(3dview) <Configure> \
323	[itcl::code $this EventuallyResize %w %h]
324
325	# Legend
326	set _image(legend) [image create picture]
327	itk_component add legend {
328	canvas $itk_component(plotarea).legend -height 50 -highlightthickness 0
329	} {
330	usual
331	ignore -highlightthickness
332	rename -background -plotbackground plotBackground Background
333	}
334	bind $itk_component(legend) <Configure> \
335	[itcl::code $this EventuallyResizeLegend]
336
337	# Hack around the Tk panewindow. The problem is that the requested
338	# size of the 3d view isn't set until an image is retrieved from
339	# the server. So the panewindow uses the tiny size.
340	set w 10000
341	pack forget $itk_component(3dview)
342	blt::table $itk_component(plotarea) \
343	0,0 $itk_component(3dview) -fill both -reqwidth $w \
344	1,0 $itk_component(legend) -fill x
345	blt::table configure $itk_component(plotarea) r1 -resize none
346	# Create flow controls...
347
348	itk_component add flowcontrols {
349	frame $itk_interior.flowcontrols
350	} {
351	usual
352	rename -background -controlbackground controlBackground Background
353	}
354	pack forget $itk_component(main)
355	blt::table $itk_interior \
356	0,0 $itk_component(main) -fill both \
357	1,0 $itk_component(flowcontrols) -fill x
358	blt::table configure $itk_interior r1 -resize none
359
360	# Rewind
361	itk_component add rewind {
362	button $itk_component(flowcontrols).reset \
363	-borderwidth 1 -padx 1 -pady 1 \
364	-image [Rappture::icon flow-rewind] \
365	-command [itcl::code $this flow reset]
366	} {
367	usual
368	ignore -borderwidth
369	rename -highlightbackground -controlbackground controlBackground \
370	Background
371	}
372	Rappture::Tooltip::for $itk_component(rewind) \
373	"Rewind flow"
374
375	# Stop
376	itk_component add stop {
377	button $itk_component(flowcontrols).stop \
378	-borderwidth 1 -padx 1 -pady 1 \
379	-image [Rappture::icon flow-stop] \
380	-command [itcl::code $this flow stop]
381	} {
382	usual
383	ignore -borderwidth
384	rename -highlightbackground -controlbackground controlBackground \
385	Background
386	}
387	Rappture::Tooltip::for $itk_component(stop) \
388	"Stop flow"
389
390	# Play
391	itk_component add play {
392	blt::tk::pushbutton $itk_component(flowcontrols).play \
393	-onimage [Rappture::icon flow-pause] \
394	-offimage [Rappture::icon flow-play] \
395	-variable [itcl::scope _settings($this-play)] \
396	-command [itcl::code $this flow toggle]
397	}
398	set fg [option get $itk_component(hull) font Font]
399	Rappture::Tooltip::for $itk_component(play) \
400	"Play/Pause flow"
401
402	# Loop
403	itk_component add loop {
404	blt::tk::pushbutton $itk_component(flowcontrols).loop \
405	-onimage [Rappture::icon flow-loop] \
406	-offimage [Rappture::icon flow-loop] \
407	-variable [itcl::scope _settings($this-loop)]
408	}
409	Rappture::Tooltip::for $itk_component(loop) \
410	"Play continuously"
411
412	itk_component add dial {
413	Rappture::Flowdial $itk_component(flowcontrols).dial \
414	-length 10 -valuewidth 0 -valuepadding 0 -padding 6 \
415	-linecolor "" -activelinecolor "" \
416	-min 0.0 -max 1.0 \
417	-variable [itcl::scope _settings($this-currenttime)] \
418	-knobimage [Rappture::icon knob2] -knobposition center@middle
419	} {
420	usual
421	ignore -dialprogresscolor
422	rename -background -controlbackground controlBackground Background
423	}
424	$itk_component(dial) current 0.0
425	bind $itk_component(dial) <<Value>> [itcl::code $this flow goto]
426	# Duration
427	itk_component add duration {
428	entry $itk_component(flowcontrols).duration \
429	-textvariable [itcl::scope _settings($this-duration)] \
430	-bg white -width 6 -font "arial 9"
431	} {
432	usual
433	ignore -highlightthickness -background
434	}
435	bind $itk_component(duration) <Return> [itcl::code $this flow duration]
436	bind $itk_component(duration) <Tab> [itcl::code $this flow duration]
437	Rappture::Tooltip::for $itk_component(duration) \
438	"Set duration of flow (format is min:sec)"
439
440
441	itk_component add durationlabel {
442	label $itk_component(flowcontrols).durationl \
443	-text "Duration:" -font $fg \
444	-highlightthickness 0
445	} {
446	usual
447	ignore -highlightthickness
448	rename -background -controlbackground controlBackground Background
449	}
450
451	itk_component add speedlabel {
452	label $itk_component(flowcontrols).speedl -text "Speed:" -font $fg \
453	-highlightthickness 0
454	} {
455	usual
456	ignore -highlightthickness
457	rename -background -controlbackground controlBackground Background
458	}
459
460	# Speed
461	itk_component add speed {
462	Rappture::Flowspeed $itk_component(flowcontrols).speed \
463	-min 1 -max 10 -width 3 -font "arial 9"
464	} {
465	usual
466	ignore -highlightthickness
467	rename -background -controlbackground controlBackground Background
468	}
469	Rappture::Tooltip::for $itk_component(speed) \
470	"Change speed of flow"
471
472	$itk_component(speed) value 1
473	bind $itk_component(speed) <<Value>> [itcl::code $this flow speed]
474
475
476	blt::table $itk_component(flowcontrols) \
477	0,0 $itk_component(rewind) -padx {3 0} \
478	0,1 $itk_component(stop) -padx {2 0} \
479	0,2 $itk_component(play) -padx {2 0} \
480	0,3 $itk_component(loop) -padx {2 0} \
481	0,4 $itk_component(dial) -fill x -padx {2 0 } \
482	0,5 $itk_component(duration) -padx { 0 0} \
483	0,7 $itk_component(speed) -padx {2 3}
484
485	# 0,6 $itk_component(speedlabel) -padx {2 0}
486	blt::table configure $itk_component(flowcontrols) c* -resize none
487	blt::table configure $itk_component(flowcontrols) c4 -resize both
488	blt::table configure $itk_component(flowcontrols) r0 -pady 1
489	# Bindings for rotation via mouse
490	bind $itk_component(3dview) <ButtonPress-1> \
491	[itcl::code $this Rotate click %x %y]
492	bind $itk_component(3dview) <B1-Motion> \
493	[itcl::code $this Rotate drag %x %y]
494	bind $itk_component(3dview) <ButtonRelease-1> \
495	[itcl::code $this Rotate release %x %y]
496
497	bind $itk_component(3dview) <Configure> \
498	[itcl::code $this EventuallyResize %w %h]
499
500	# Bindings for panning via mouse
501	bind $itk_component(3dview) <ButtonPress-2> \
502	[itcl::code $this Pan click %x %y]
503	bind $itk_component(3dview) <B2-Motion> \
504	[itcl::code $this Pan drag %x %y]
505	bind $itk_component(3dview) <ButtonRelease-2> \
506	[itcl::code $this Pan release %x %y]
507
508	# Bindings for panning via keyboard
509	bind $itk_component(3dview) <KeyPress-Left> \
510	[itcl::code $this Pan set -10 0]
511	bind $itk_component(3dview) <KeyPress-Right> \
512	[itcl::code $this Pan set 10 0]
513	bind $itk_component(3dview) <KeyPress-Up> \
514	[itcl::code $this Pan set 0 -10]
515	bind $itk_component(3dview) <KeyPress-Down> \
516	[itcl::code $this Pan set 0 10]
517	bind $itk_component(3dview) <Shift-KeyPress-Left> \
518	[itcl::code $this Pan set -2 0]
519	bind $itk_component(3dview) <Shift-KeyPress-Right> \
520	[itcl::code $this Pan set 2 0]
521	bind $itk_component(3dview) <Shift-KeyPress-Up> \
522	[itcl::code $this Pan set 0 -2]
523	bind $itk_component(3dview) <Shift-KeyPress-Down> \
524	[itcl::code $this Pan set 0 2]
525
526	# Bindings for zoom via keyboard
527	bind $itk_component(3dview) <KeyPress-Prior> \
528	[itcl::code $this Zoom out]
529	bind $itk_component(3dview) <KeyPress-Next> \
530	[itcl::code $this Zoom in]
531
532	bind $itk_component(3dview) <Enter> "focus $itk_component(3dview)"
533
534	if {[string equal "x11" [tk windowingsystem]]} {
535	# Bindings for zoom via mouse
536	bind $itk_component(3dview) <4> [itcl::code $this Zoom out]
537	bind $itk_component(3dview) <5> [itcl::code $this Zoom in]
538	}
539
540	set _image(download) [image create picture]
541
542	eval itk_initialize $args
543
544	Connect
545	}
546
547	# ----------------------------------------------------------------------
548	# DESTRUCTOR
549	# ----------------------------------------------------------------------
550	itcl::body Rappture::FlowvisViewer::destructor {} {
551	set _sendobjs "" ;# stop any send in progress
552	$_dispatcher cancel !rebuild
553	$_dispatcher cancel !send_dataobjs
554	$_dispatcher cancel !send_transfunc
555	image delete $_image(plot)
556	image delete $_image(legend)
557	image delete $_image(download)
558	array unset _settings $this-*
559	}
560
561	# ----------------------------------------------------------------------
562	# USAGE: add <dataobj> ?<settings>?
563	#
564	# Clients use this to add a data object to the plot. The optional
565	# <settings> are used to configure the plot. Allowed settings are
566	# -color, -brightness, -width, -linestyle, and -raise.
567	# ----------------------------------------------------------------------
568	itcl::body Rappture::FlowvisViewer::add {dataobj {settings ""}} {
569	array set params {
570	-color auto
571	-width 1
572	-linestyle solid
573	-brightness 0
574	-raise 0
575	-description ""
576	-param ""
577	}
578	foreach {opt val} $settings {
579	if {![info exists params($opt)]} {
580	error "bad setting \"$opt\": should be [join [lsort [array names params]] {, }]"
581	}
582	set params($opt) $val
583	}
584	if {$params(-color) == "auto" \|\| $params(-color) == "autoreset"} {
585	# can't handle -autocolors yet
586	set params(-color) black
587	}
588	foreach comp [$dataobj components] {
589	set flowobj [$dataobj flowhints $comp]
590	if { $flowobj == "" } {
591	puts stderr "no flowhints $dataobj-$comp"
592	continue
593	}
594	set _obj2flow($dataobj-$comp) $flowobj
595	}
596	set pos [lsearch -exact $dataobj $_dlist]
597	if {$pos < 0} {
598	lappend _dlist $dataobj
599	set _allDataObjs($dataobj) 1
600	set _obj2ovride($dataobj-color) $params(-color)
601	set _obj2ovride($dataobj-width) $params(-width)
602	set _obj2ovride($dataobj-raise) $params(-raise)
603	$_dispatcher event -idle !rebuild
604	}
605	}
606
607	# ----------------------------------------------------------------------
608	# USAGE: get ?-objects?
609	# USAGE: get ?-image 3dview\|legend?
610	#
611	# Clients use this to query the list of objects being plotted, in
612	# order from bottom to top of this result. The optional "-image"
613	# flag can also request the internal images being shown.
614	# ----------------------------------------------------------------------
615	itcl::body Rappture::FlowvisViewer::get {args} {
616	if {[llength $args] == 0} {
617	set args "-objects"
618	}
619
620	set op [lindex $args 0]
621	switch -- $op {
622	-objects {
623	# put the dataobj list in order according to -raise options
624	set dlist $_dlist
625	foreach obj $dlist {
626	if {[info exists _obj2ovride($obj-raise)] && $_obj2ovride($obj-raise)} {
627	set i [lsearch -exact $dlist $obj]
628	if {$i >= 0} {
629	set dlist [lreplace $dlist $i $i]
630	lappend dlist $obj
631	}
632	}
633	}
634	return $dlist
635	}
636	-image {
637	if {[llength $args] != 2} {
638	error "wrong # args: should be \"get -image 3dview\|legend\""
639	}
640	switch -- [lindex $args end] {
641	3dview {
642	return $_image(plot)
643	}
644	legend {
645	return $_image(legend)
646	}
647	default {
648	error "bad image name \"[lindex $args end]\": should be 3dview or legend"
649	}
650	}
651	}
652	default {
653	error "bad option \"$op\": should be -objects or -image"
654	}
655	}
656	}
657
658	# ----------------------------------------------------------------------
659	# USAGE: delete ?<dataobj1> <dataobj2> ...?
660	#
661	# Clients use this to delete a dataobj from the plot. If no dataobjs
662	# are specified, then all dataobjs are deleted. No data objects are
663	# deleted. They are only removed from the display list.
664	#
665	# ----------------------------------------------------------------------
666	itcl::body Rappture::FlowvisViewer::delete {args} {
667	flow stop
668	if {[llength $args] == 0} {
669	set args $_dlist
670	}
671
672	# Delete all specified dataobjs
673	set changed 0
674	foreach dataobj $args {
675	set pos [lsearch -exact $_dlist $dataobj]
676	if { $pos >= 0 } {
677	foreach comp [$dataobj components] {
678	array unset _limits $dataobj-$comp-*
679	}
680	set _dlist [lreplace $_dlist $pos $pos]
681	array unset _obj2ovride $dataobj-*
682	array unset _obj2flow $dataobj-*
683	array unset _serverObjs $dataobj-*
684	array unset _obj2style $dataobj-*
685	set changed 1
686	}
687	}
688	# If anything changed, then rebuild the plot
689	if {$changed} {
690	# Repair the reverse lookup
691	foreach tf [array names _style2objs] {
692	set list {}
693	foreach {dataobj comp} $_style2objs($tf) break
694	if { [info exists _serverObjs($dataobj-$comp)] } {
695	lappend list $dataobj $comp
696	}
697	if { $list == "" } {
698	array unset _style2objs $tf
699	} else {
700	set _style2objs($tf) $list
701	}
702	}
703	$_dispatcher event -idle !rebuild
704	}
705	}
706
707	# ----------------------------------------------------------------------
708	# USAGE: scale ?<data1> <data2> ...?
709	#
710	# Sets the default limits for the overall plot according to the
711	# limits of the data for all of the given <data> objects. This
712	# accounts for all objects--even those not showing on the screen.
713	# Because of this, the limits are appropriate for all objects as
714	# the user scans through data in the ResultSet viewer.
715	# ----------------------------------------------------------------------
716	itcl::body Rappture::FlowvisViewer::scale {args} {
717	foreach val {xmin xmax ymin ymax zmin zmax vmin vmax} {
718	set _limits($val) ""
719	}
720	foreach obj $args {
721	foreach axis {x y z v} {
722
723	foreach { min max } [$obj limits $axis] break
724
725	if {"" != $min && "" != $max} {
726	if {"" == $_limits(${axis}min)} {
727	set _limits(${axis}min) $min
728	set _limits(${axis}max) $max
729	} else {
730	if {$min < $_limits(${axis}min)} {
731	set _limits(${axis}min) $min
732	}
733	if {$max > $_limits(${axis}max)} {
734	set _limits(${axis}max) $max
735	}
736	}
737	}
738	}
739	}
740	}
741
742	# ----------------------------------------------------------------------
743	# USAGE: download coming
744	# USAGE: download controls <downloadCommand>
745	# USAGE: download now
746	#
747	# Clients use this method to create a downloadable representation
748	# of the plot. Returns a list of the form {ext string}, where
749	# "ext" is the file extension (indicating the type of data) and
750	# "string" is the data itself.
751	# ----------------------------------------------------------------------
752	itcl::body Rappture::FlowvisViewer::download {option args} {
753	set popup .flowvisviewerdownload
754	switch $option {
755	coming {
756	if {[catch { $_image(download) snap $itk_component(plotarea)}]} {
757	$_image(download) blank #000000
758	}
759	}
760	controls {
761	if {![winfo exists $popup]} {
762	# if we haven't created the popup yet, do it now
763	Rappture::Balloon $popup \
764	-title "[Rappture::filexfer::label downloadWord] as..."
765	set inner [$popup component inner]
766	label $inner.summary -text "" -anchor w
767	pack $inner.summary -side top
768	set img $_image(plot)
769	set res "[image width $img]x[image height $img]"
770	radiobutton $inner.draft -text "Image (draft $res)" \
771	-variable Rappture::FlowvisViewer::_downloadPopup(format) \
772	-value draft
773	pack $inner.draft -anchor w
774
775	set res "640x480"
776	radiobutton $inner.medium -text "Movie (standard $res)" \
777	-variable Rappture::FlowvisViewer::_downloadPopup(format) \
778	-value $res
779	pack $inner.medium -anchor w
780
781	set res "1024x768"
782	radiobutton $inner.high -text "Movie (high quality $res)" \
783	-variable Rappture::FlowvisViewer::_downloadPopup(format) \
784	-value $res
785	pack $inner.high -anchor w
786	button $inner.go -text [Rappture::filexfer::label download] \
787	-command [lindex $args 0]
788	pack $inner.go -pady 4
789	$inner.draft select
790	} else {
791	set inner [$popup component inner]
792	}
793	set num [llength [get]]
794	set num [expr {($num == 1) ? "1 result" : "$num results"}]
795	set word [Rappture::filexfer::label downloadWord]
796	$inner.summary configure -text "$word $num in the following format:"
797	update idletasks ;# fix initial sizes
798	return $popup
799	}
800	now {
801	if { [winfo exists $popup] } {
802	$popup deactivate
803	}
804	switch -- $_downloadPopup(format) {
805	draft {
806	$_image(plot) export jpg -quality 100 -data bytes
807	return [list .jpg $bytes]
808	}
809	"640x480" {
810	return [$this GetMovie [lindex $args 0] 640 480]
811	}
812	"1024x768" {
813	return [$this GetMovie [lindex $args 0] 1024 768]
814	}
815	default {
816	error "bad download format $_downloadPopup(format)"
817	}
818	}
819	}
820	default {
821	error "bad option \"$option\": should be coming, controls, now"
822	}
823	}
824	}
825
826	# ----------------------------------------------------------------------
827	# USAGE: Connect ?<host:port>,<host:port>...?
828	#
829	# Clients use this method to establish a connection to a new
830	# server, or to reestablish a connection to the previous server.
831	# Any existing connection is automatically closed.
832	# ----------------------------------------------------------------------
833	itcl::body Rappture::FlowvisViewer::Connect {} {
834	set _hosts [GetServerList "nanovis"]
835	if { "" == $_hosts } {
836	return 0
837	}
838	set result [VisViewer::Connect $_hosts]
839	if { $result } {
840	set w [winfo width $itk_component(3dview)]
841	set h [winfo height $itk_component(3dview)]
842	EventuallyResize $w $h
843	}
844	return $result
845	}
846
847	#
848	# isconnected --
849	#
850	# Indicates if we are currently connected to the visualization server.
851	#
852	itcl::body Rappture::FlowvisViewer::isconnected {} {
853	return [VisViewer::IsConnected]
854	}
855
856	#
857	# disconnect --
858	#
859	itcl::body Rappture::FlowvisViewer::disconnect {} {
860	Disconnect
861	}
862
863	#
864	# sendto --
865	#
866	itcl::body Rappture::FlowvisViewer::sendto { bytes } {
867	SendBytes "$bytes\n"
868	}
869
870	#
871	# Disconnect --
872	#
873	# Clients use this method to disconnect from the current rendering
874	# server.
875	#
876	itcl::body Rappture::FlowvisViewer::Disconnect {} {
877	VisViewer::Disconnect
878
879	# disconnected -- no more data sitting on server
880	set _outbuf ""
881	array unset _serverObjs
882	set _sendobjs ""
883	}
884
885	#
886	# SendCmd
887	#
888	# Send commands off to the rendering server. If we're currently
889	# sending data objects to the server, buffer the commands to be
890	# sent later.
891	#
892	itcl::body Rappture::FlowvisViewer::SendCmd { string } {
893	if { $_buffering } {
894	append _outbuf $string "\n"
895	} else {
896	foreach line [split $string \n] {
897	SendEcho >>line $line
898	}
899	SendBytes "$string\n"
900	}
901	}
902
903	# ----------------------------------------------------------------------
904	# USAGE: SendDataObjs
905	#
906	# Used internally to send a series of volume objects off to the
907	# server. Sends each object, a little at a time, with updates in
908	# between so the interface doesn't lock up.
909	# ----------------------------------------------------------------------
910	itcl::body Rappture::FlowvisViewer::SendDataObjs {} {
911	puts stderr "in SendDataObjs"
912
913	blt::busy hold $itk_component(hull)
914	foreach dataobj $_sendobjs {
915	foreach comp [$dataobj components] {
916	# Send the data as one huge base64-encoded mess -- yuck!
917	set data [$dataobj blob $comp]
918	set nbytes [string length $data]
919	set extents [$dataobj extents $comp]
920
921	# I have a field. Is a vector field or a volume field?
922	if { $extents == 1 } {
923	set cmd "volume data follows $nbytes $dataobj-$comp\n"
924	} else {
925	set cmd [FlowCmd $dataobj $comp $nbytes $extents]
926	if { $cmd == "" } {
927	puts stderr "no command"
928	continue
929	}
930	}
931	f { ![SendBytes $cmd] } {
932	puts stderr "can't send"
933	return
934	}
935	if { ![SendBytes $data] } {
936	puts stderr "can't send"
937	return
938	}
939	NameTransferFunc $dataobj $comp
940	set _recvObjs($dataobj-$comp) 1
941	}
942	}
943	set _sendobjs ""
944	blt::busy release $itk_component(hull)
945
946	# Turn on buffering of commands to the server. We don't want to
947	# be preempted by a server disconnect/reconnect (which automatically
948	# generates a new call to Rebuild).
949	set _buffering 1
950
951	# activate the proper volume
952	set _first [lindex [get] 0]
953	if { "" != $_first } {
954	set axis [$_first hints updir]
955	if {"" != $axis} {
956	SendCmd "up $axis"
957	}
958
959	if 0 {
960	set location [$_first hints camera]
961	if { $location != "" } {
962	array set _view $location
963	}
964	set _settings($this-theta) $_view(theta)
965	set _settings($this-phi) $_view(phi)
966	set _settings($this-psi) $_view(psi)
967	set _settings($this-pan-x) $_view(pan-x)
968	set _settings($this-pan-y) $_view(pan-y)
969	set _settings($this-zoom) $_view(zoom)
970	set xyz [Euler2XYZ $_view(theta) $_view(phi) $_view(psi)]
971	SendCmd "camera angle $xyz"
972	PanCamera
973	SendCmd "camera zoom $_view(zoom)"
974	}
975	# The active transfer function is by default the first component of
976	# the first data object. This assumes that the data is always
977	# successfully transferred.
978	set comp [lindex [$_first components] 0]
979	set _activeTf [lindex $_obj2style($_first-$comp) 0]
980	}
981
982	SendCmd "flow reset"
983
984	# Actually write the commands to the server socket. If it fails, we don't
985	# care. We're finished here.
986	SendBytes $_outbuf;
987	set _buffering 0; # Turn off buffering.
988	set _outbuf ""; # Clear the buffer.
989	}
990
991	# ----------------------------------------------------------------------
992	# USAGE: SendTransferFuncs
993	# ----------------------------------------------------------------------
994	itcl::body Rappture::FlowvisViewer::SendTransferFuncs {} {
995	if { $_activeTf == "" } {
996	puts stderr "no active tf"
997	return
998	}
999	set tf $_activeTf
1000	if { $_first == "" } {
1001	puts stderr "no first"
1002	return
1003	}
1004
1005	# Insure that the global opacity and thickness settings (in the slider
1006	# settings widgets) are used for the active transfer-function. Update the
1007	# values in the _settings varible.
1008	set value $_settings($this-opacity)
1009	set opacity [expr { double($value) * 0.01 }]
1010	set _settings($this-$tf-opacity) $opacity
1011	set value $_settings($this-thickness)
1012	# Scale values between 0.00001 and 0.01000
1013	set thickness [expr {double($value) * 0.0001}]
1014	set _settings($this-$tf-thickness) $thickness
1015
1016	foreach key [array names _obj2style $_first-*] {
1017	if { [info exists _obj2style($key)] } {
1018	foreach tf $_obj2style($key) {
1019	ComputeTransferFunc $tf
1020	}
1021	}
1022	}
1023	EventuallyResizeLegend
1024	}
1025
1026	# ----------------------------------------------------------------------
1027	# USAGE: ReceiveImage -bytes $size -type $type -token $token
1028	#
1029	# Invoked automatically whenever the "image" command comes in from
1030	# the rendering server. Indicates that binary image data with the
1031	# specified <size> will follow.
1032	# ----------------------------------------------------------------------
1033	itcl::body Rappture::FlowvisViewer::ReceiveImage { args } {
1034	array set info {
1035	-token "???"
1036	-bytes 0
1037	-type image
1038	}
1039	array set info $args
1040	set bytes [ReceiveBytes $info(-bytes)]
1041	ReceiveEcho <<line "<read $info(-bytes) bytes"
1042	switch -- $info(-type) {
1043	"image" {
1044	$_image(plot) configure -data $bytes
1045	#puts stderr "image received [image width $_image(plot)] by [image height $_image(plot)]"
1046	}
1047	"print" {
1048	set tag $this-$info(-token)
1049	set _hardcopy($tag) $bytes
1050	}
1051	"movie" {
1052	puts stderr "read [string length $bytes] bytes type=$info(-type) token=$info(-token)"
1053	set tag $this-$info(-token)
1054	set _hardcopy($tag) $bytes
1055	}
1056	default {
1057	puts stderr "unknown download type $info(-type)"
1058	}
1059	}
1060	}
1061
1062	#
1063	# ReceiveLegend --
1064	#
1065	# The procedure is the response from the render server to each "legend"
1066	# command. The server sends back a "legend" command invoked our
1067	# the slave interpreter. The purpose is to collect data of the image
1068	# representing the legend in the canvas. In addition, the isomarkers
1069	# of the active transfer function are displayed.
1070	#
1071	# I don't know is this is the right place to display the isomarkers.
1072	# I don't know all the different paths used to draw the plot. There's
1073	# "Rebuild", "add", etc.
1074	#
1075	itcl::body Rappture::FlowvisViewer::ReceiveLegend { tag vmin vmax size } {
1076	if { ![isconnected] } {
1077	return
1078	}
1079	#puts stderr "receive legend $tag $vmin $vmax $size"
1080	set bytes [ReceiveBytes $size]
1081	$_image(legend) configure -data $bytes
1082	ReceiveEcho <<line "<read $size bytes for [image width $_image(legend)]x[image height $_image(legend)] legend>"
1083
1084	set c $itk_component(legend)
1085	set w [winfo width $c]
1086	set h [winfo height $c]
1087	set lx 10
1088	set ly [expr {$h - 1}]
1089	if {"" == [$c find withtag transfunc]} {
1090	$c create image 10 10 -anchor nw \
1091	-image $_image(legend) -tags transfunc
1092	$c create text $lx $ly -anchor sw \
1093	-fill $itk_option(-plotforeground) -tags "limits vmin"
1094	$c create text [expr {$w-$lx}] $ly -anchor se \
1095	-fill $itk_option(-plotforeground) -tags "limits vmax"
1096	$c lower transfunc
1097	$c bind transfunc <ButtonRelease-1> \
1098	[itcl::code $this AddIsoMarker %x %y]
1099	}
1100	# Display the markers used by the active transfer function.
1101	set tf $_obj2style($tag)
1102	array set limits [limits $tf]
1103	$c itemconfigure vmin -text [format %.2g $limits(vmin)]
1104	$c coords vmin $lx $ly
1105
1106	$c itemconfigure vmax -text [format %.2g $limits(vmax)]
1107	$c coords vmax [expr {$w-$lx}] $ly
1108
1109	if { [info exists _isomarkers($tf)] } {
1110	foreach m $_isomarkers($tf) {
1111	$m visible yes
1112	}
1113	}
1114	}
1115
1116	#
1117	# ReceiveData --
1118	#
1119	# The procedure is the response from the render server to each "data
1120	# follows" command. The server sends back a "data" command invoked our
1121	# the slave interpreter. The purpose is to collect the min/max of the
1122	# volume sent to the render server. Since the client (flowvisviewer)
1123	# doesn't parse 3D data formats, we rely on the server (flowvis) to
1124	# tell us what the limits are. Once we've received the limits to all
1125	# the data we've sent (tracked by _recvObjs) we can then determine
1126	# what the transfer functions are for these # volumes.
1127	#
1128	# Note: There is a considerable tradeoff in having the server report
1129	# back what the data limits are. It means that much of the code
1130	# having to do with transfer-functions has to wait for the data
1131	# to come back, since the isomarkers are calculated based upon
1132	# the data limits. The client code is much messier because of
1133	# this. The alternative is to parse any of the 3D formats on the
1134	# client side.
1135	#
1136	itcl::body Rappture::FlowvisViewer::ReceiveData { args } {
1137	if { ![isconnected] } {
1138	return
1139	}
1140	# Arguments from server are name value pairs. Stuff them in an array.
1141	array set values $args
1142	set tag $values(tag)
1143	set parts [split $tag -]
1144	set dataobj [lindex $parts 0]
1145	set _serverObjs($tag) 0
1146	set _limits($tag-min) $values(min); # Minimum value of the volume.
1147	set _limits($tag-max) $values(max); # Maximum value of the volume.
1148	unset _recvObjs($tag)
1149	if { [array size _recvObjs] == 0 } {
1150	updatetransferfuncs
1151	}
1152	}
1153
1154	#
1155	# Rebuild --
1156	#
1157	# Called automatically whenever something changes that affects the data
1158	# in the widget. Clears any existing data and rebuilds the widget to
1159	# display new data.
1160	#
1161	itcl::body Rappture::FlowvisViewer::Rebuild {} {
1162
1163	# Hide all the isomarkers. Can't remove them. Have to remember the
1164	# settings since the user may have created/deleted/moved markers.
1165
1166	foreach tf [array names _isomarkers] {
1167	foreach m $_isomarkers($tf) {
1168	$m visible no
1169	}
1170	}
1171
1172	set _first ""
1173	# Turn on buffering of commands to the server. We don't want to
1174	# be preempted by a server disconnect/reconnect (which automatically
1175	# generates a new call to Rebuild).
1176	set _buffering 1
1177
1178	set w [winfo width $itk_component(3dview)]
1179	set h [winfo height $itk_component(3dview)]
1180	EventuallyResize $w $h
1181
1182	foreach dataobj [get] {
1183	foreach comp [$dataobj components] {
1184	# Send the data as one huge base64-encoded mess -- yuck!
1185	set data [$dataobj blob $comp]
1186	set nbytes [string length $data]
1187	set extents [$dataobj extents $comp]
1188	# I have a field. Is a vector field or a volume field?
1189	if { $extents == 1 } {
1190	set cmd "volume data follows $nbytes $dataobj-$comp\n"
1191	} else {
1192	set cmd [FlowCmd $dataobj $comp $nbytes $extents]
1193	if { $cmd == "" } {
1194	puts stderr "no command"
1195	continue
1196	}
1197	}
1198	append _outbuf $cmd
1199	append _outbuf $data
1200	NameTransferFunc $dataobj $comp
1201	set _recvObjs($dataobj-$comp) 1
1202	}
1203	}
1204
1205	set _first [lindex [get] 0]
1206
1207	# Reset the camera and other view parameters
1208	FixSettings isosurface
1209	FixSettings grid
1210	FixSettings axes
1211	FixSettings volume
1212	FixSettings outline
1213	FixSettings light
1214	FixSettings transp
1215
1216	# nothing to send -- activate the proper volume
1217	if {"" != $_first} {
1218	FixSettings light
1219	FixSettings transp
1220	set axis [$_first hints updir]
1221	if {"" != $axis} {
1222	SendCmd "up $axis"
1223	}
1224	set location [$_first hints camera]
1225	if { $location != "" } {
1226	array set _view $location
1227	}
1228	}
1229	set _settings($this-theta) $_view(theta)
1230	set _settings($this-phi) $_view(phi)
1231	set _settings($this-psi) $_view(psi)
1232	set _settings($this-pan-x) $_view(pan-x)
1233	set _settings($this-pan-y) $_view(pan-y)
1234	set _settings($this-zoom) $_view(zoom)
1235
1236	set xyz [Euler2XYZ $_view(theta) $_view(phi) $_view(psi)]
1237	SendCmd "camera angle $xyz"
1238	PanCamera
1239	SendCmd "camera zoom $_view(zoom)"
1240
1241	foreach dataobj [get] {
1242	foreach comp [$dataobj components] {
1243	NameTransferFunc $dataobj $comp
1244	}
1245	}
1246
1247	# nothing to send -- activate the proper ivol
1248	set _first [lindex [get] 0]
1249	if {"" != $_first} {
1250	set axis [$_first hints updir]
1251	if {"" != $axis} {
1252	SendCmd "up $axis"
1253	}
1254	set location [$_first hints camera]
1255	if { $location != "" } {
1256	array set _view $location
1257	}
1258	set comp [lindex [$_first components] 0]
1259	set _activeTf [lindex $_obj2style($_first-$comp) 0]
1260	}
1261
1262
1263	# sync the state of slicers
1264	set vols [CurrentVolumeIds -cutplanes]
1265	foreach axis {x y z} {
1266	SendCmd "cutplane state $_settings($this-${axis}cutplane) $axis $vols"
1267	set pos [expr {0.01*$_settings($this-${axis}cutposition)}]
1268	SendCmd "cutplane position $pos $axis $vols"
1269	}
1270	SendCmd "volume data state $_settings($this-volume)"
1271	EventuallyResizeLegend
1272
1273	# Actually write the commands to the server socket. If it fails, we don't
1274	# care. We're finished here.
1275	blt::busy hold $itk_component(hull)
1276	SendBytes $_outbuf
1277	blt::busy release $itk_component(hull)
1278	set _buffering 0; # Turn off buffering.
1279	set _outbuf ""; # Clear the buffer.
1280	}
1281
1282	# ----------------------------------------------------------------------
1283	# USAGE: CurrentVolumeIds ?-cutplanes?
1284	#
1285	# Returns a list of volume server IDs for the current volume being
1286	# displayed. This is normally a single ID, but it might be a list
1287	# of IDs if the current data object has multiple components.
1288	# ----------------------------------------------------------------------
1289	itcl::body Rappture::FlowvisViewer::CurrentVolumeIds {{what -all}} {
1290	return ""
1291	if { $_first == "" } {
1292	return
1293	}
1294	foreach key [array names _serverObjs -] {
1295	if {[string match $_first-* $key]} {
1296	array set style {
1297	-cutplanes 1
1298	}
1299	foreach {dataobj comp} [split $key -] break
1300	array set style [lindex [$dataobj components -style $comp] 0]
1301	if {$what != "-cutplanes" \|\| $style(-cutplanes)} {
1302	lappend rlist $_serverObjs($key)
1303	}
1304	}
1305	}
1306	return $rlist
1307	}
1308
1309	# ----------------------------------------------------------------------
1310	# USAGE: Zoom in
1311	# USAGE: Zoom out
1312	# USAGE: Zoom reset
1313	#
1314	# Called automatically when the user clicks on one of the zoom
1315	# controls for this widget. Changes the zoom for the current view.
1316	# ----------------------------------------------------------------------
1317	itcl::body Rappture::FlowvisViewer::Zoom {option} {
1318	switch -- $option {
1319	"in" {
1320	set _view(zoom) [expr {$_view(zoom)*1.25}]
1321	set _settings($this-zoom) $_view(zoom)
1322	}
1323	"out" {
1324	set _view(zoom) [expr {$_view(zoom)*0.8}]
1325	set _settings($this-zoom) $_view(zoom)
1326	}
1327	"reset" {
1328	array set _view {
1329	theta 45
1330	phi 45
1331	psi 0
1332	zoom 1.0
1333	pan-x 0
1334	pan-y 0
1335	}
1336	if { $_first != "" } {
1337	set location [$_first hints camera]
1338	if { $location != "" } {
1339	array set _view $location
1340	}
1341	}
1342	set xyz [Euler2XYZ $_view(theta) $_view(phi) $_view(psi)]
1343	SendCmd "camera angle $xyz"
1344	PanCamera
1345	set _settings($this-theta) $_view(theta)
1346	set _settings($this-phi) $_view(phi)
1347	set _settings($this-psi) $_view(psi)
1348	set _settings($this-pan-x) $_view(pan-x)
1349	set _settings($this-pan-y) $_view(pan-y)
1350	set _settings($this-zoom) $_view(zoom)
1351	}
1352	}
1353	SendCmd "camera zoom $_view(zoom)"
1354	}
1355
1356	itcl::body Rappture::FlowvisViewer::PanCamera {} {
1357	#set x [expr ($_view(pan-x)) / $_limits(xrange)]
1358	#set y [expr ($_view(pan-y)) / $_limits(yrange)]
1359	set x $_view(pan-x)
1360	set y $_view(pan-y)
1361	SendCmd "camera pan $x $y"
1362	}
1363
1364	# ----------------------------------------------------------------------
1365	# USAGE: Rotate click <x> <y>
1366	# USAGE: Rotate drag <x> <y>
1367	# USAGE: Rotate release <x> <y>
1368	#
1369	# Called automatically when the user clicks/drags/releases in the
1370	# plot area. Moves the plot according to the user's actions.
1371	# ----------------------------------------------------------------------
1372	itcl::body Rappture::FlowvisViewer::Rotate {option x y} {
1373	switch -- $option {
1374	click {
1375	$itk_component(3dview) configure -cursor fleur
1376	set _click(x) $x
1377	set _click(y) $y
1378	set _click(theta) $_view(theta)
1379	set _click(phi) $_view(phi)
1380	}
1381	drag {
1382	if {[array size _click] == 0} {
1383	Rotate click $x $y
1384	} else {
1385	set w [winfo width $itk_component(3dview)]
1386	set h [winfo height $itk_component(3dview)]
1387	if {$w <= 0 \|\| $h <= 0} {
1388	return
1389	}
1390
1391	if {[catch {
1392	# this fails sometimes for no apparent reason
1393	set dx [expr {double($x-$_click(x))/$w}]
1394	set dy [expr {double($y-$_click(y))/$h}]
1395	}]} {
1396	return
1397	}
1398
1399	#
1400	# Rotate the camera in 3D
1401	#
1402	if {$_view(psi) > 90 \|\| $_view(psi) < -90} {
1403	# when psi is flipped around, theta moves backwards
1404	set dy [expr {-$dy}]
1405	}
1406	set theta [expr {$_view(theta) - $dy*180}]
1407	while {$theta < 0} { set theta [expr {$theta+180}] }
1408	while {$theta > 180} { set theta [expr {$theta-180}] }
1409
1410	if {abs($theta) >= 30 && abs($theta) <= 160} {
1411	set phi [expr {$_view(phi) - $dx*360}]
1412	while {$phi < 0} { set phi [expr {$phi+360}] }
1413	while {$phi > 360} { set phi [expr {$phi-360}] }
1414	set psi $_view(psi)
1415	} else {
1416	set phi $_view(phi)
1417	set psi [expr {$_view(psi) - $dx*360}]
1418	while {$psi < -180} { set psi [expr {$psi+360}] }
1419	while {$psi > 180} { set psi [expr {$psi-360}] }
1420	}
1421
1422	set _view(theta) $theta
1423	set _view(phi) $phi
1424	set _view(psi) $psi
1425	set xyz [Euler2XYZ $theta $phi $psi]
1426	set _settings($this-theta) $_view(theta)
1427	set _settings($this-phi) $_view(phi)
1428	set _settings($this-psi) $_view(psi)
1429	SendCmd "camera angle $xyz"
1430	set _click(x) $x
1431	set _click(y) $y
1432	}
1433	}
1434	release {
1435	Rotate drag $x $y
1436	$itk_component(3dview) configure -cursor ""
1437	catch {unset _click}
1438	}
1439	default {
1440	error "bad option \"$option\": should be click, drag, release"
1441	}
1442	}
1443	}
1444
1445	# ----------------------------------------------------------------------
1446	# USAGE: $this Pan click x y
1447	# $this Pan drag x y
1448	# $this Pan release x y
1449	#
1450	# Called automatically when the user clicks on one of the zoom
1451	# controls for this widget. Changes the zoom for the current view.
1452	# ----------------------------------------------------------------------
1453	itcl::body Rappture::FlowvisViewer::Pan {option x y} {
1454	# Experimental stuff
1455	set w [winfo width $itk_component(3dview)]
1456	set h [winfo height $itk_component(3dview)]
1457	if { $option == "set" } {
1458	set x [expr $x / double($w)]
1459	set y [expr $y / double($h)]
1460	set _view(pan-x) [expr $_view(pan-x) + $x]
1461	set _view(pan-y) [expr $_view(pan-y) + $y]
1462	PanCamera
1463	set _settings($this-pan-x) $_view(pan-x)
1464	set _settings($this-pan-y) $_view(pan-y)
1465	return
1466	}
1467	if { $option == "click" } {
1468	set _click(x) $x
1469	set _click(y) $y
1470	$itk_component(3dview) configure -cursor hand1
1471	}
1472	if { $option == "drag" \|\| $option == "release" } {
1473	set dx [expr ($_click(x) - $x)/double($w)]
1474	set dy [expr ($_click(y) - $y)/double($h)]
1475	set _click(x) $x
1476	set _click(y) $y
1477	set _view(pan-x) [expr $_view(pan-x) - $dx]
1478	set _view(pan-y) [expr $_view(pan-y) - $dy]
1479	PanCamera
1480	set _settings($this-pan-x) $_view(pan-x)
1481	set _settings($this-pan-y) $_view(pan-y)
1482	}
1483	if { $option == "release" } {
1484	$itk_component(3dview) configure -cursor ""
1485	}
1486	}
1487
1488
1489	# ----------------------------------------------------------------------
1490	# USAGE: Flow movie record\|stop\|play ?on\|off\|toggle?
1491	#
1492	# Called when the user clicks on the record, stop or play buttons
1493	# for flow visualization.
1494	# ----------------------------------------------------------------------
1495	itcl::body Rappture::FlowvisViewer::Flow {option args} {
1496	switch -- $option {
1497	movie {
1498	if {[llength $args] < 1 \|\| [llength $args] > 2} {
1499	error "wrong # args: should be \"Flow movie record\|stop\|play ?on\|off\|toggle?\""
1500	}
1501	set action [lindex $args 0]
1502	set op [lindex $args 1]
1503	if {$op == ""} { set op "on" }
1504
1505	set current [State $action]
1506	if {$op == "toggle"} {
1507	if {$current == "on"} {
1508	set op "off"
1509	} else {
1510	set op "on"
1511	}
1512	}
1513	set cmds ""
1514	switch -- $action {
1515	record {
1516	if { [$itk_component(rewind) cget -relief] != "sunken" } {
1517	$itk_component(rewind) configure -relief sunken
1518	$itk_component(stop) configure -relief raised
1519	$itk_component(play) configure -relief raised
1520	set inner $itk_component(settingsFrame)
1521	set frames [$inner.framecnt value]
1522	set _settings(nsteps) $frames
1523	set cmds "flow capture $frames"
1524	SendCmd $cmds
1525	}
1526	}
1527	stop {
1528	if { [$itk_component(stop) cget -relief] != "sunken" } {
1529	$itk_component(rewind) configure -relief raised
1530	$itk_component(stop) configure -relief sunken
1531	$itk_component(play) configure -relief raised
1532	_pause
1533	set cmds "flow reset"
1534	SendCmd $cmds
1535	}
1536	}
1537	play {
1538	if { [$itk_component(play) cget -relief] != "sunken" } {
1539	$itk_component(rewind) configure -relief raised
1540	$itk_component(stop) configure -relief raised
1541	$itk_component(play) configure \
1542	-image [Rappture::icon flow-pause] \
1543	-relief sunken
1544	bind $itk_component(play) <ButtonPress> \
1545	[itcl::code $this _pause]
1546	flow next
1547	}
1548	}
1549	default {
1550	error "bad option \"$option\": should be one of record\|stop\|play"
1551	}
1552
1553	}
1554	}
1555	default {
1556	error "bad option \"$option\": should be movie"
1557	}
1558	}
1559	}
1560
1561	# ----------------------------------------------------------------------
1562	# USAGE: Play
1563	#
1564	# ----------------------------------------------------------------------
1565	itcl::body Rappture::FlowvisViewer::Play {} {
1566	SendCmd "flow next"
1567	set delay [expr {int(ceil(pow($_settings(speed)/10.0+2,2.0)*15))}]
1568	$_dispatcher event -after $delay !play
1569	}
1570
1571	# ----------------------------------------------------------------------
1572	# USAGE: Pause
1573	#
1574	# Invoked when the user hits the "pause" button to stop playing the
1575	# current sequence of frames as a movie.
1576	# ----------------------------------------------------------------------
1577	itcl::body Rappture::FlowvisViewer::Pause {} {
1578	$_dispatcher cancel !play
1579
1580	# Toggle the button to "play" mode
1581	$itk_component(play) configure \
1582	-image [Rappture::icon flow-start] \
1583	-relief raised
1584	bind $itk_component(play) <ButtonPress> \
1585	[itcl::code $this Flow movie play toggle]
1586	}
1587
1588	# ----------------------------------------------------------------------
1589	# USAGE: FixSettings <what> ?<value>?
1590	#
1591	# Used internally to update rendering settings whenever parameters
1592	# change in the popup settings panel. Sends the new settings off
1593	# to the back end.
1594	# ----------------------------------------------------------------------
1595	itcl::body Rappture::FlowvisViewer::FixSettings {what {value ""}} {
1596	switch -- $what {
1597	light {
1598	if { $_first != "" } {
1599	set comp [lindex [$_first components] 0]
1600	set tag $_first-$comp
1601	set diffuse [expr {0.1*$_settings($this-light)}]
1602	set specular [expr {sqrt($_settings($this-light)+1.0)}]
1603	SendCmd "$tag configure -diffuse $diffuse -specular $specular"
1604	}
1605	}
1606	transp {
1607	if { $_first != "" } {
1608	set comp [lindex [$_first components] 0]
1609	set tag $_first-$comp
1610	set opacity [expr {0.2*$_settings($this-transp)+1}]
1611	SendCmd "$tag configure -opacity $opacity"
1612	}
1613	}
1614	opacity {
1615	if { $_first != "" && $_activeTf != "" } {
1616	set opacity [expr { 0.01 * double($_settings($this-opacity)) }]
1617	set tf $_activeTf
1618	set _settings($this-$tf-opacity) $opacity
1619	updatetransferfuncs
1620	}
1621	}
1622
1623	thickness {
1624	if { $_first != "" && $_activeTf != "" } {
1625	set val $_settings($this-thickness)
1626	# Scale values between 0.00001 and 0.01000
1627	set sval [expr {0.0001*double($val)}]
1628	set tf $_activeTf
1629	set _settings($this-$tf-thickness) $sval
1630	updatetransferfuncs
1631	}
1632	}
1633	"outline" {
1634	if { $_first != "" } {
1635	set comp [lindex [$_first components] 0]
1636	set tag $_first-$comp
1637	SendCmd "$tag configure -outline $_settings($this-outline)"
1638	}
1639	}
1640	"isosurface" {
1641	if { [isconnected] } {
1642	SendCmd "volume shading isosurface $_settings($this-isosurface)"
1643	}
1644	}
1645	"grid" {
1646	if { [isconnected] } {
1647	SendCmd "grid visible $_settings($this-grid)"
1648	}
1649	}
1650	"axes" {
1651	if { [isconnected] } {
1652	SendCmd "axis visible $_settings($this-axes)"
1653	}
1654	}
1655	"legend" {
1656	if { $_settings($this-legend) } {
1657	blt::table $itk_component(plotarea) \
1658	0,0 $itk_component(3dview) -fill both \
1659	1,0 $itk_component(legend) -fill x
1660	blt::table configure $itk_component(plotarea) r1 -resize none
1661	} else {
1662	blt::table forget $itk_component(legend)
1663	}
1664	}
1665	"volume" {
1666	if { $_first != "" } {
1667	set comp [lindex [$_first components] 0]
1668	set tag $_first-$comp
1669	SendCmd "$tag configure -volume $_settings($this-volume)"
1670	}
1671	}
1672	"xcutplane" - "ycutplane" - "zcutplane" {
1673	set axis [string range $what 0 0]
1674	set bool $_settings($this-$what)
1675	if { [isconnected] } {
1676	set vols [CurrentVolumeIds -cutplanes]
1677	SendCmd "cutplane state $bool $axis $vols"
1678	}
1679	if { $bool } {
1680	$itk_component(${axis}CutScale) configure -state normal \
1681	-troughcolor white
1682	} else {
1683	$itk_component(${axis}CutScale) configure -state disabled \
1684	-troughcolor grey82
1685	}
1686	}
1687	default {
1688	error "don't know how to fix $what"
1689	}
1690	}
1691	}
1692
1693	# ----------------------------------------------------------------------
1694	# USAGE: ResizeLegend
1695	#
1696	# Used internally to update the legend area whenever it changes size
1697	# or when the field changes. Asks the server to send a new legend
1698	# for the current field.
1699	# ----------------------------------------------------------------------
1700	itcl::body Rappture::FlowvisViewer::ResizeLegend {} {
1701	set _resizeLegendPending 0
1702	set lineht [font metrics $itk_option(-font) -linespace]
1703	set w [expr {$_width-20}]
1704	set h [expr {[winfo height $itk_component(legend)]-20-$lineht}]
1705
1706	if { $_first == "" } {
1707	return
1708	}
1709	set comp [lindex [$_first components] 0]
1710	set tag $_first-$comp
1711	#set _activeTf [lindex $_obj2style($tag) 0]
1712	if {$w > 0 && $h > 0 && "" != $_activeTf} {
1713	#SendCmd "legend $_activeTf $w $h"
1714	SendCmd "$tag legend $w $h"
1715	} else {
1716	# Can't do this as this will remove the items associated with the
1717	# isomarkers.
1718
1719	#$itk_component(legend) delete all
1720	}
1721	}
1722
1723	#
1724	# NameTransferFunc --
1725	#
1726	# Creates a transfer function name based on the <style> settings in the
1727	# library run.xml file. This placeholder will be used later to create
1728	# and send the actual transfer function once the data info has been sent
1729	# to us by the render server. [We won't know the volume limits until the
1730	# server parses the 3D data and sends back the limits via ReceiveData.]
1731	#
1732	# FIXME: The current way we generate transfer-function names completely
1733	# ignores the -markers option. The problem is that we are forced
1734	# to compute the name from an increasing complex set of values:
1735	# color, levels, marker, opacity. I think we're stuck doing it
1736	# now.
1737	#
1738	itcl::body Rappture::FlowvisViewer::NameTransferFunc { dataobj comp } {
1739	array set style {
1740	-color rainbow
1741	-levels 6
1742	-opacity 1.0
1743	-light 40
1744	-transp 50
1745	}
1746	array set style [lindex [$dataobj components -style $comp] 0]
1747	set _settings($this-light) $style(-light)
1748	set _settings($this-transp) $style(-transp)
1749	set _settings($this-opacity) [expr $style(-opacity) * 100]
1750	set tf "$style(-color):$style(-levels):$style(-opacity)"
1751	set _obj2style($dataobj-$comp) $tf
1752	lappend _style2objs($tf) $dataobj $comp
1753	return $tf
1754	}
1755
1756	#
1757	# ComputeTransferFunc --
1758	#
1759	# Computes and sends the transfer function to the render server. It's
1760	# assumed that the volume data limits are known and that the global
1761	# transfer-functions slider values have be setup. Both parts are
1762	# needed to compute the relative value (location) of the marker, and
1763	# the alpha map of the transfer function.
1764	#
1765	itcl::body Rappture::FlowvisViewer::ComputeTransferFunc { tf } {
1766	array set style {
1767	-color rainbow
1768	-levels 6
1769	-opacity 1.0
1770	-light 40
1771	-transp 50
1772	}
1773	set dataobj ""; set comp ""
1774	foreach {dataobj comp} $_style2objs($tf) break
1775	if { $dataobj == "" } {
1776	return 0
1777	}
1778	array set style [lindex [$dataobj components -style $comp] 0]
1779
1780
1781	# We have to parse the style attributes for a volume using this
1782	# transfer-function once. This sets up the initial isomarkers for the
1783	# transfer function. The user may add/delete markers, so we have to
1784	# maintain a list of markers for each transfer-function. We use the one
1785	# of the volumes (the first in the list) using the transfer-function as a
1786	# reference.
1787	#
1788	# FIXME: The current way we generate transfer-function names completely
1789	# ignores the -markers option. The problem is that we are forced
1790	# to compute the name from an increasing complex set of values:
1791	# color, levels, marker, opacity. I think the cow's out of the
1792	# barn on this one.
1793
1794	if { ![info exists _isomarkers($tf)] } {
1795	# Have to defer creation of isomarkers until we have data limits
1796	if { [info exists style(-markers)] } {
1797	ParseMarkersOption $tf $style(-markers)
1798	} else {
1799	ParseLevelsOption $tf $style(-levels)
1800	}
1801	}
1802	if {$style(-color) == "rainbow"} {
1803	set style(-color) "white:yellow:green:cyan:blue:magenta"
1804	}
1805	if { [info exists style(-nonuniformcolors)] } {
1806	foreach { value color } $style(-nonuniformcolors) {
1807	append cmap "$value [Color2RGB $color] "
1808	}
1809	} else {
1810	set clist [split $style(-color) :]
1811	set cmap "0.0 [Color2RGB white] "
1812	for {set i 0} {$i < [llength $clist]} {incr i} {
1813	set x [expr {double($i+1)/([llength $clist]+1)}]
1814	set color [lindex $clist $i]
1815	append cmap "$x [Color2RGB $color] "
1816	}
1817	append cmap "1.0 [Color2RGB $color]"
1818	}
1819	set tag $this-$tf
1820	if { ![info exists _settings($tag-opacity)] } {
1821	set _settings($tag-opacity) $style(-opacity)
1822	}
1823	set max $_settings($tag-opacity)
1824
1825	set isovalues {}
1826	foreach m $_isomarkers($tf) {
1827	lappend isovalues [$m relval]
1828	}
1829	# Sort the isovalues
1830	set isovalues [lsort -real $isovalues]
1831
1832	if { ![info exists _settings($tag-thickness)]} {
1833	set _settings($tag-thickness) 0.05
1834	}
1835	set delta $_settings($tag-thickness)
1836
1837	set first [lindex $isovalues 0]
1838	set last [lindex $isovalues end]
1839	set wmap ""
1840	if { $first == "" \|\| $first != 0.0 } {
1841	lappend wmap 0.0 0.0
1842	}
1843	foreach x $isovalues {
1844	set x1 [expr {$x-$delta-0.00001}]
1845	set x2 [expr {$x-$delta}]
1846	set x3 [expr {$x+$delta}]
1847	set x4 [expr {$x+$delta+0.00001}]
1848	if { $x1 < 0.0 } {
1849	set x1 0.0
1850	} elseif { $x1 > 1.0 } {
1851	set x1 1.0
1852	}
1853	if { $x2 < 0.0 } {
1854	set x2 0.0
1855	} elseif { $x2 > 1.0 } {
1856	set x2 1.0
1857	}
1858	if { $x3 < 0.0 } {
1859	set x3 0.0
1860	} elseif { $x3 > 1.0 } {
1861	set x3 1.0
1862	}
1863	if { $x4 < 0.0 } {
1864	set x4 0.0
1865	} elseif { $x4 > 1.0 } {
1866	set x4 1.0
1867	}
1868	# add spikes in the middle
1869	lappend wmap $x1 0.0
1870	lappend wmap $x2 $max
1871	lappend wmap $x3 $max
1872	lappend wmap $x4 0.0
1873	}
1874	if { $last == "" \|\| $last != 1.0 } {
1875	lappend wmap 1.0 0.0
1876	}
1877	SendCmd "transfunc define $tf { $cmap } { $wmap }\n"
1878	return [SendCmd "$dataobj-$comp configure -transferfunction $tf\n"]
1879	}
1880
1881	# ----------------------------------------------------------------------
1882	# CONFIGURATION OPTION: -plotbackground
1883	# ----------------------------------------------------------------------
1884	itcl::configbody Rappture::FlowvisViewer::plotbackground {
1885	if { [isconnected] } {
1886	foreach {r g b} [Color2RGB $itk_option(-plotbackground)] break
1887	#fix this!
1888	#SendCmd "color background $r $g $b"
1889	}
1890	}
1891
1892	# ----------------------------------------------------------------------
1893	# CONFIGURATION OPTION: -plotforeground
1894	# ----------------------------------------------------------------------
1895	itcl::configbody Rappture::FlowvisViewer::plotforeground {
1896	if { [isconnected] } {
1897	foreach {r g b} [Color2RGB $itk_option(-plotforeground)] break
1898	#fix this!
1899	#SendCmd "color background $r $g $b"
1900	}
1901	}
1902
1903	# ----------------------------------------------------------------------
1904	# CONFIGURATION OPTION: -plotoutline
1905	# ----------------------------------------------------------------------
1906	itcl::configbody Rappture::FlowvisViewer::plotoutline {
1907	# Must check if we are connected because this routine is called from the
1908	# class body when the -plotoutline itk_option is defined. At that point
1909	# the FlowvisViewer class constructor hasn't been called, so we can't
1910	# start sending commands to visualization server.
1911	if { [isconnected] } {
1912	if {"" == $itk_option(-plotoutline)} {
1913	SendCmd "volume outline state off"
1914	} else {
1915	SendCmd "volume outline state on"
1916	SendCmd "volume outline color [Color2RGB $itk_option(-plotoutline)]"
1917	}
1918	}
1919	}
1920
1921	#
1922	# The -levels option takes a single value that represents the number
1923	# of evenly distributed markers based on the current data range. Each
1924	# marker is a relative value from 0.0 to 1.0.
1925	#
1926	itcl::body Rappture::FlowvisViewer::ParseLevelsOption { tf levels } {
1927	set c $itk_component(legend)
1928	regsub -all "," $levels " " levels
1929	if {[string is int $levels]} {
1930	for {set i 1} { $i <= $levels } {incr i} {
1931	set x [expr {double($i)/($levels+1)}]
1932	set m [Rappture::IsoMarker \#auto $c $this $tf]
1933	$m relval $x
1934	lappend _isomarkers($tf) $m
1935	}
1936	} else {
1937	foreach x $levels {
1938	set m [Rappture::IsoMarker \#auto $c $this $tf]
1939	$m relval $x
1940	lappend _isomarkers($tf) $m
1941	}
1942	}
1943	}
1944
1945	#
1946	# The -markers option takes a list of zero or more values (the values
1947	# may be separated either by spaces or commas) that have the following
1948	# format:
1949	#
1950	# N% Percent of current total data range. Converted to
1951	# to a relative value between 0.0 and 1.0.
1952	# N Absolute value of marker. If the marker is outside of
1953	# the current range, it will be displayed on the outer
1954	# edge of the legends, but it range it represents will
1955	# not be seen.
1956	#
1957	itcl::body Rappture::FlowvisViewer::ParseMarkersOption { tf markers } {
1958	set c $itk_component(legend)
1959	regsub -all "," $markers " " markers
1960	foreach marker $markers {
1961	set n [scan $marker "%g%s" value suffix]
1962	if { $n == 2 && $suffix == "%" } {
1963	# ${n}% : Set relative value.
1964	set value [expr {$value * 0.01}]
1965	set m [Rappture::IsoMarker \#auto $c $this $tf]
1966	$m relval $value
1967	lappend _isomarkers($tf) $m
1968	} else {
1969	# ${n} : Set absolute value.
1970	set m [Rappture::IsoMarker \#auto $c $this $tf]
1971	$m absval $value
1972	lappend _isomarkers($tf) $m
1973	}
1974	}
1975	}
1976
1977	# ----------------------------------------------------------------------
1978	# USAGE: UndateTransferFuncs
1979	# ----------------------------------------------------------------------
1980	itcl::body Rappture::FlowvisViewer::updatetransferfuncs {} {
1981	$_dispatcher event -after 100 !send_transfunc
1982	}
1983
1984	itcl::body Rappture::FlowvisViewer::AddIsoMarker { x y } {
1985	if { $_activeTf == "" } {
1986	error "active transfer function isn't set"
1987	}
1988	set tf $_activeTf
1989	set c $itk_component(legend)
1990	set m [Rappture::IsoMarker \#auto $c $this $tf]
1991	set w [winfo width $c]
1992	$m relval [expr {double($x-10)/($w-20)}]
1993	lappend _isomarkers($tf) $m
1994	updatetransferfuncs
1995	return 1
1996	}
1997
1998	itcl::body Rappture::FlowvisViewer::rmdupmarker { marker x } {
1999	set tf [$marker transferfunc]
2000	set bool 0
2001	if { [info exists _isomarkers($tf)] } {
2002	set list {}
2003	set marker [namespace tail $marker]
2004	foreach m $_isomarkers($tf) {
2005	set sx [$m screenpos]
2006	if { $m != $marker } {
2007	if { $x >= ($sx-3) && $x <= ($sx+3) } {
2008	$marker relval [$m relval]
2009	itcl::delete object $m
2010	bell
2011	set bool 1
2012	continue
2013	}
2014	}
2015	lappend list $m
2016	}
2017	set _isomarkers($tf) $list
2018	updatetransferfuncs
2019	}
2020	return $bool
2021	}
2022
2023	itcl::body Rappture::FlowvisViewer::overmarker { marker x } {
2024	set tf [$marker transferfunc]
2025	if { [info exists _isomarkers($tf)] } {
2026	set marker [namespace tail $marker]
2027	foreach m $_isomarkers($tf) {
2028	set sx [$m screenpos]
2029	if { $m != $marker } {
2030	set bool [expr { $x >= ($sx-3) && $x <= ($sx+3) }]
2031	$m activate $bool
2032	}
2033	}
2034	}
2035	return ""
2036	}
2037
2038	itcl::body Rappture::FlowvisViewer::limits { tf } {
2039	set _limits(vmin) 0.0
2040	set _limits(vmax) 1.0
2041	if { ![info exists _style2objs($tf)] } {
2042	puts stderr "no style2objs for $tf tf=($tf)"
2043	return [array get _limits]
2044	}
2045	set min ""; set max ""
2046	foreach {dataobj comp} $_style2objs($tf) {
2047	set tag $dataobj-$comp
2048	if { ![info exists _serverObjs($tag)] } {
2049	puts stderr "$tag not in serverObjs?"
2050	continue
2051	}
2052	if { ![info exists _limits($tag-min)] } {
2053	puts stderr "$tag no min?"
2054	continue
2055	}
2056	if { $min == "" \|\| $min > $_limits($tag-min) } {
2057	set min $_limits($tag-min)
2058	}
2059	if { $max == "" \|\| $max < $_limits($tag-max) } {
2060	set max $_limits($tag-max)
2061	}
2062	}
2063	if { $min != "" } {
2064	set _limits(vmin) $min
2065	}
2066	if { $max != "" } {
2067	set _limits(vmax) $max
2068	}
2069	return [array get _limits]
2070	}
2071
2072
2073
2074	itcl::body Rappture::FlowvisViewer::BuildViewTab {} {
2075	foreach { key value } {
2076	grid 0
2077	axes 0
2078	outline 1
2079	volume 1
2080	legend 1
2081	particles 1
2082	lic 1
2083	} {
2084	set _settings($this-$key) $value
2085	}
2086
2087	set fg [option get $itk_component(hull) font Font]
2088	#set bfg [option get $itk_component(hull) boldFont Font]
2089
2090	set inner [$itk_component(main) insert end \
2091	-title "View Settings" \
2092	-icon [Rappture::icon wrench]]
2093	$inner configure -borderwidth 4
2094
2095	set ::Rappture::FlowvisViewer::_settings($this-isosurface) 0
2096	checkbutton $inner.isosurface \
2097	-text "Isosurface shading" \
2098	-variable [itcl::scope _settings($this-isosurface)] \
2099	-command [itcl::code $this FixSettings isosurface] \
2100	-font "Arial 9"
2101
2102	checkbutton $inner.axes \
2103	-text "Axes" \
2104	-variable [itcl::scope _settings($this-axes)] \
2105	-command [itcl::code $this FixSettings axes] \
2106	-font "Arial 9"
2107
2108	checkbutton $inner.grid \
2109	-text "Grid" \
2110	-variable [itcl::scope _settings($this-grid)] \
2111	-command [itcl::code $this FixSettings grid] \
2112	-font "Arial 9"
2113
2114	checkbutton $inner.outline \
2115	-text "Outline" \
2116	-variable [itcl::scope _settings($this-outline)] \
2117	-command [itcl::code $this FixSettings outline] \
2118	-font "Arial 9"
2119
2120	checkbutton $inner.legend \
2121	-text "Legend" \
2122	-variable [itcl::scope _settings($this-legend)] \
2123	-command [itcl::code $this FixSettings legend] \
2124	-font "Arial 9"
2125
2126	checkbutton $inner.volume \
2127	-text "Volume" \
2128	-variable [itcl::scope _settings($this-volume)] \
2129	-command [itcl::code $this FixSettings volume] \
2130	-font "Arial 9"
2131
2132	checkbutton $inner.particles \
2133	-text "Particles" \
2134	-variable [itcl::scope _settings($this-particles)] \
2135	-command [itcl::code $this FixSettings particles] \
2136	-font "Arial 9"
2137
2138	checkbutton $inner.lic \
2139	-text "Lic" \
2140	-variable [itcl::scope _settings($this-lic)] \
2141	-command [itcl::code $this FixSettings lic] \
2142	-font "Arial 9"
2143
2144	frame $inner.frame
2145
2146	blt::table $inner \
2147	0,0 $inner.axes -columnspan 2 -anchor w \
2148	1,0 $inner.grid -columnspan 2 -anchor w \
2149	2,0 $inner.outline -columnspan 2 -anchor w \
2150	3,0 $inner.volume -columnspan 2 -anchor w \
2151	4,0 $inner.legend -columnspan 2 -anchor w
2152
2153	bind $inner <Map> [itcl::code $this GetFlowInfo $inner]
2154
2155	blt::table configure $inner r* -resize none
2156	blt::table configure $inner r5 -resize expand
2157	}
2158
2159	itcl::body Rappture::FlowvisViewer::BuildVolumeTab {} {
2160	foreach { key value } {
2161	light 40
2162	transp 50
2163	opacity 100
2164	thickness 350
2165	} {
2166	set _settings($this-$key) $value
2167	}
2168
2169	set inner [$itk_component(main) insert end \
2170	-title "Volume Settings" \
2171	-icon [Rappture::icon volume-on]]
2172	$inner configure -borderwidth 4
2173
2174	set fg [option get $itk_component(hull) font Font]
2175	#set bfg [option get $itk_component(hull) boldFont Font]
2176
2177	checkbutton $inner.vol -text "Show volume" -font $fg \
2178	-text "Volume" \
2179	-variable [itcl::scope _settings($this-volume)] \
2180	-command [itcl::code $this FixSettings volume] \
2181	-font "Arial 9"
2182
2183	label $inner.shading -text "Shading:" -font $fg
2184
2185	label $inner.dim -text "Dim" -font $fg
2186	::scale $inner.light -from 0 -to 100 -orient horizontal \
2187	-variable [itcl::scope _settings($this-light)] \
2188	-width 10 \
2189	-showvalue off -command [itcl::code $this FixSettings light]
2190	label $inner.bright -text "Bright" -font $fg
2191
2192	label $inner.fog -text "Fog" -font $fg
2193	::scale $inner.transp -from 0 -to 100 -orient horizontal \
2194	-variable [itcl::scope _settings($this-transp)] \
2195	-width 10 \
2196	-showvalue off -command [itcl::code $this FixSettings transp]
2197	label $inner.plastic -text "Plastic" -font $fg
2198
2199	label $inner.clear -text "Clear" -font $fg
2200	::scale $inner.opacity -from 0 -to 100 -orient horizontal \
2201	-variable [itcl::scope _settings($this-opacity)] \
2202	-width 10 \
2203	-showvalue off -command [itcl::code $this FixSettings opacity]
2204	label $inner.opaque -text "Opaque" -font $fg
2205
2206	label $inner.thin -text "Thin" -font $fg
2207	::scale $inner.thickness -from 0 -to 1000 -orient horizontal \
2208	-variable [itcl::scope _settings($this-thickness)] \
2209	-width 10 \
2210	-showvalue off -command [itcl::code $this FixSettings thickness]
2211	label $inner.thick -text "Thick" -font $fg
2212
2213	blt::table $inner \
2214	0,0 $inner.vol -columnspan 4 -anchor w -pady 2 \
2215	1,0 $inner.shading -columnspan 4 -anchor w -pady {10 2} \
2216	2,0 $inner.dim -anchor e -pady 2 \
2217	2,1 $inner.light -columnspan 2 -pady 2 -fill x \
2218	2,3 $inner.bright -anchor w -pady 2 \
2219	3,0 $inner.fog -anchor e -pady 2 \
2220	3,1 $inner.transp -columnspan 2 -pady 2 -fill x \
2221	3,3 $inner.plastic -anchor w -pady 2 \
2222	4,0 $inner.clear -anchor e -pady 2 \
2223	4,1 $inner.opacity -columnspan 2 -pady 2 -fill x\
2224	4,3 $inner.opaque -anchor w -pady 2 \
2225	5,0 $inner.thin -anchor e -pady 2 \
2226	5,1 $inner.thickness -columnspan 2 -pady 2 -fill x\
2227	5,3 $inner.thick -anchor w -pady 2
2228
2229	if 0 {
2230	0,0 $inner.dim -anchor e -pady 2 \
2231	0,1 $inner.light -columnspan 2 -pady 2 \
2232	0,3 $inner.bright -anchor w -pady 2 \
2233	1,0 $inner.fog -anchor e -pady 2 \
2234	1,1 $inner.transp -columnspan 2 -pady 2 \
2235	1,3 $inner.plastic -anchor w -pady 2 \
2236	2,0 $inner.clear -anchor e -pady 2 \
2237	2,1 $inner.opacity -columnspan 2 -pady 2 \
2238	2,3 $inner.opaque -anchor w -pady 2 \
2239	3,0 $inner.thin -anchor e -pady 2 \
2240	3,1 $inner.thickness -columnspan 2 -pady 2 \
2241	3,3 $inner.thick -anchor w -pady 2
2242	}
2243	blt::table configure $inner c0 c1 c3 r* -resize none
2244	blt::table configure $inner r6 -resize expand
2245	}
2246
2247	itcl::body Rappture::FlowvisViewer::BuildCutplanesTab {} {
2248	set inner [$itk_component(main) insert end \
2249	-title "Cutplane Settings" \
2250	-icon [Rappture::icon cutbutton]]
2251	$inner configure -borderwidth 4
2252
2253	# X-value slicer...
2254	itk_component add xCutButton {
2255	blt::tk::pushbutton $inner.xbutton \
2256	-onimage [Rappture::icon x-cutplane] \
2257	-offimage [Rappture::icon x-cutplane] \
2258	-command [itcl::code $this FixSettings xcutplane] \
2259	-variable [itcl::scope _settings($this-xcutplane)]
2260	}
2261	Rappture::Tooltip::for $itk_component(xCutButton) \
2262	"Toggle the X cut plane on/off"
2263
2264	itk_component add xCutScale {
2265	::scale $inner.xval -from 100 -to 0 \
2266	-width 10 -orient vertical -showvalue off \
2267	-borderwidth 1 -highlightthickness 0 \
2268	-command [itcl::code $this Slice move x] \
2269	-variable [itcl::scope _settings($this-xcutposition)]
2270	} {
2271	usual
2272	ignore -borderwidth -highlightthickness
2273	}
2274	# Set the default cutplane value before disabling the scale.
2275	$itk_component(xCutScale) set 50
2276	$itk_component(xCutScale) configure -state disabled
2277	Rappture::Tooltip::for $itk_component(xCutScale) \
2278	"@[itcl::code $this SlicerTip x]"
2279
2280	# Y-value slicer...
2281	itk_component add yCutButton {
2282	blt::tk::pushbutton $inner.ybutton \
2283	-onimage [Rappture::icon y-cutplane] \
2284	-offimage [Rappture::icon y-cutplane] \
2285	-command [itcl::code $this FixSettings ycutplane] \
2286	-variable [itcl::scope _settings($this-ycutplane)]
2287	}
2288	Rappture::Tooltip::for $itk_component(yCutButton) \
2289	"Toggle the Y cut plane on/off"
2290
2291	itk_component add yCutScale {
2292	::scale $inner.yval -from 100 -to 0 \
2293	-width 10 -orient vertical -showvalue off \
2294	-borderwidth 1 -highlightthickness 0 \
2295	-command [itcl::code $this Slice move y] \
2296	-variable [itcl::scope _settings($this-ycutposition)]
2297	} {
2298	usual
2299	ignore -borderwidth -highlightthickness
2300	}
2301	Rappture::Tooltip::for $itk_component(yCutScale) \
2302	"@[itcl::code $this SlicerTip y]"
2303	# Set the default cutplane value before disabling the scale.
2304	$itk_component(yCutScale) set 50
2305	$itk_component(yCutScale) configure -state disabled
2306
2307	# Z-value slicer...
2308	itk_component add zCutButton {
2309	blt::tk::pushbutton $inner.zbutton \
2310	-onimage [Rappture::icon z-cutplane] \
2311	-offimage [Rappture::icon z-cutplane] \
2312	-command [itcl::code $this FixSettings zcutplane] \
2313	-variable [itcl::scope _settings($this-zcutplane)]
2314	}
2315	Rappture::Tooltip::for $itk_component(zCutButton) \
2316	"Toggle the Z cut plane on/off"
2317
2318	itk_component add zCutScale {
2319	::scale $inner.zval -from 100 -to 0 \
2320	-width 10 -orient vertical -showvalue off \
2321	-borderwidth 1 -highlightthickness 0 \
2322	-command [itcl::code $this Slice move z] \
2323	-variable [itcl::scope _settings($this-zcutposition)]
2324	} {
2325	usual
2326	ignore -borderwidth -highlightthickness
2327	}
2328	$itk_component(zCutScale) set 50
2329	$itk_component(zCutScale) configure -state disabled
2330	#$itk_component(zCutScale) configure -state disabled
2331	Rappture::Tooltip::for $itk_component(zCutScale) \
2332	"@[itcl::code $this SlicerTip z]"
2333
2334	blt::table $inner \
2335	1,1 $itk_component(xCutButton) \
2336	1,2 $itk_component(yCutButton) \
2337	1,3 $itk_component(zCutButton) \
2338	0,1 $itk_component(xCutScale) \
2339	0,2 $itk_component(yCutScale) \
2340	0,3 $itk_component(zCutScale) \
2341
2342	blt::table configure $inner r0 r1 c* -resize none
2343	blt::table configure $inner r2 c4 -resize expand
2344	blt::table configure $inner c0 -width 2
2345	blt::table configure $inner c1 c2 c3 -padx 2
2346	}
2347
2348	itcl::body Rappture::FlowvisViewer::BuildCameraTab {} {
2349	set inner [$itk_component(main) insert end \
2350	-title "Camera Settings" \
2351	-icon [Rappture::icon camera]]
2352	$inner configure -borderwidth 4
2353
2354	set labels { phi theta psi pan-x pan-y zoom }
2355	set row 0
2356	foreach tag $labels {
2357	label $inner.${tag}label -text $tag -font "Arial 9"
2358	entry $inner.${tag} -font "Arial 9" -bg white \
2359	-textvariable [itcl::scope _settings($this-$tag)]
2360	bind $inner.${tag} <KeyPress-Return> \
2361	[itcl::code $this camera set ${tag}]
2362	blt::table $inner \
2363	$row,0 $inner.${tag}label -anchor e -pady 2 \
2364	$row,1 $inner.${tag} -anchor w -pady 2
2365	blt::table configure $inner r$row -resize none
2366	incr row
2367	}
2368	blt::table configure $inner c0 c1 -resize none
2369	blt::table configure $inner c2 -resize expand
2370	blt::table configure $inner r$row -resize expand
2371	}
2372
2373	itcl::body Rappture::FlowvisViewer::GetFlowInfo { w } {
2374	set flowobj ""
2375	foreach key [array names _obj2flow] {
2376	set flowobj $_obj2flow($key)
2377	break
2378	}
2379	if { $flowobj == "" } {
2380	return
2381	}
2382	if { [winfo exists $w.frame] } {
2383	destroy $w.frame
2384	}
2385	set inner [frame $w.frame]
2386	blt::table $w \
2387	5,0 $inner -fill both -columnspan 2 -anchor nw
2388	array set hints [$flowobj hints]
2389	checkbutton $inner.showstreams -text "Streams Plane" \
2390	-variable [itcl::scope _settings($this-streams)] \
2391	-command [itcl::code $this streams $key $hints(name)] \
2392	-font "Arial 9"
2393	Rappture::Tooltip::for $inner.showstreams $hints(description)
2394
2395	checkbutton $inner.showarrows -text "Arrows" \
2396	-variable [itcl::scope _settings($this-arrows)] \
2397	-command [itcl::code $this arrows $key $hints(name)] \
2398	-font "Arial 9"
2399
2400	label $inner.particles -text "Particles" -font "Arial 9 bold"
2401	label $inner.boxes -text "Boxes" -font "Arial 9 bold"
2402
2403	blt::table $inner \
2404	1,0 $inner.showstreams -anchor w \
2405	2,0 $inner.showarrows -anchor w
2406	blt::table configure $inner c0 c1 -resize none
2407	blt::table configure $inner c2 -resize expand
2408
2409	set row 3
2410	set particles [$flowobj particles]
2411	if { [llength $particles] > 0 } {
2412	blt::table $inner $row,0 $inner.particles -anchor w
2413	incr row
2414	}
2415	foreach part $particles {
2416	array unset info
2417	array set info $part
2418	set name $info(name)
2419	if { ![info exists _settings($this-particles-$name)] } {
2420	set _settings($this-particles-$name) $info(hide)
2421	}
2422	checkbutton $inner.part$row -text $info(label) \
2423	-variable [itcl::scope _settings($this-particles-$name)] \
2424	-onvalue 0 -offvalue 1 \
2425	-command [itcl::code $this particles $key $name] \
2426	-font "Arial 9"
2427	Rappture::Tooltip::for $inner.part$row $info(description)
2428	blt::table $inner $row,0 $inner.part$row -anchor w
2429	if { !$_settings($this-particles-$name) } {
2430	$inner.part$row select
2431	}
2432	incr row
2433	}
2434	set boxes [$flowobj boxes]
2435	if { [llength $boxes] > 0 } {
2436	blt::table $inner $row,0 $inner.boxes -anchor w
2437	incr row
2438	}
2439	foreach box $boxes {
2440	array unset info
2441	array set info $box
2442	set name $info(name)
2443	if { ![info exists _settings($this-box-$name)] } {
2444	set _settings($this-box-$name) $info(hide)
2445	}
2446	checkbutton $inner.box$row -text $info(label) \
2447	-variable [itcl::scope _settings($this-box-$name)] \
2448	-onvalue 0 -offvalue 1 \
2449	-command [itcl::code $this box $key $name] \
2450	-font "Arial 9"
2451	Rappture::Tooltip::for $inner.box$row $info(description)
2452	blt::table $inner $row,0 $inner.box$row -anchor w
2453	if { !$_settings($this-box-$name) } {
2454	$inner.box$row select
2455	}
2456	incr row
2457	}
2458	blt::table configure $inner r* -resize none
2459	blt::table configure $inner r$row -resize expand
2460	blt::table configure $inner c3 -resize expand
2461	event generate [winfo parent [winfo parent $w]] <Configure>
2462	}
2463
2464	itcl::body Rappture::FlowvisViewer::particles { tag name } {
2465	set bool $_settings($this-particles-$name)
2466	SendCmd "$tag particles configure {$name} -hide $bool"
2467	}
2468
2469	itcl::body Rappture::FlowvisViewer::box { tag name } {
2470	set bool $_settings($this-box-$name)
2471	SendCmd "$tag box configure {$name} -hide $bool"
2472	}
2473
2474	itcl::body Rappture::FlowvisViewer::streams { tag name } {
2475	set bool $_settings($this-streams)
2476	SendCmd "$tag configure -slice $bool"
2477	}
2478
2479	itcl::body Rappture::FlowvisViewer::arrows { tag name } {
2480	set bool $_settings($this-arrows)
2481	SendCmd "$tag configure -arrows no"
2482	}
2483
2484	# ----------------------------------------------------------------------
2485	# USAGE: Slice move x\|y\|z <newval>
2486	#
2487	# Called automatically when the user drags the slider to move the
2488	# cut plane that slices 3D data. Gets the current value from the
2489	# slider and moves the cut plane to the appropriate point in the
2490	# data set.
2491	# ----------------------------------------------------------------------
2492	itcl::body Rappture::FlowvisViewer::Slice {option args} {
2493	switch -- $option {
2494	move {
2495	if {[llength $args] != 2} {
2496	error "wrong # args: should be \"Slice move x\|y\|z newval\""
2497	}
2498	set axis [lindex $args 0]
2499	set newval [lindex $args 1]
2500	set newpos [expr {0.01*$newval}]
2501
2502	# show the current value in the readout
2503
2504	set ids [CurrentVolumeIds -cutplanes]
2505	SendCmd "cutplane position $newpos $axis $ids"
2506	}
2507	default {
2508	error "bad option \"$option\": should be axis, move, or volume"
2509	}
2510	}
2511	}
2512
2513	# ----------------------------------------------------------------------
2514	# USAGE: SlicerTip <axis>
2515	#
2516	# Used internally to generate a tooltip for the x/y/z slicer controls.
2517	# Returns a message that includes the current slicer value.
2518	# ----------------------------------------------------------------------
2519	itcl::body Rappture::FlowvisViewer::SlicerTip {axis} {
2520	set val [$itk_component(${axis}CutScale) get]
2521	# set val [expr {0.01*($val-50)
2522	# *($_limits(${axis}max)-$_limits(${axis}min))
2523	# + 0.5*($_limits(${axis}max)+$_limits(${axis}min))}]
2524	return "Move the [string toupper $axis] cut plane.\nCurrently: $axis = $val%"
2525	}
2526
2527
2528	itcl::body Rappture::FlowvisViewer::Resize {} {
2529	SendCmd "screen $_width $_height"
2530	set _resizePending 0
2531	}
2532
2533	itcl::body Rappture::FlowvisViewer::EventuallyResize { w h } {
2534	set _width $w
2535	set _height $h
2536	if { !$_resizePending } {
2537	$_dispatcher event -after 200 !resize
2538	set _resizePending 1
2539	}
2540	}
2541
2542	itcl::body Rappture::FlowvisViewer::EventuallyResizeLegend {} {
2543	if { !$_resizeLegendPending } {
2544	$_dispatcher event -after 100 !legend
2545	set _resizeLegendPending 1
2546	}
2547	}
2548
2549	itcl::body Rappture::FlowvisViewer::EventuallyGoto { nSteps } {
2550	set _flow(goto) $nSteps
2551	if { !$_gotoPending } {
2552	$_dispatcher event -after 1000 !goto
2553	set _gotoPending 1
2554	}
2555	}
2556
2557	# camera --
2558	itcl::body Rappture::FlowvisViewer::camera {option args} {
2559	switch -- $option {
2560	"show" {
2561	puts [array get _view]
2562	}
2563	"set" {
2564	set who [lindex $args 0]
2565	set x $_settings($this-$who)
2566	set code [catch { string is double $x } result]
2567	if { $code != 0 \|\| !$result } {
2568	set _settings($this-$who) $_view($who)
2569	return
2570	}
2571	switch -- $who {
2572	"pan-x" - "pan-y" {
2573	set _view($who) $_settings($this-$who)
2574	PanCamera
2575	}
2576	"phi" - "theta" - "psi" {
2577	set _view($who) $_settings($this-$who)
2578	set xyz [Euler2XYZ $_view(theta) $_view(phi) $_view(psi)]
2579	SendCmd "camera angle $xyz"
2580	}
2581	"zoom" {
2582	set _view($who) $_settings($this-$who)
2583	SendCmd "camera zoom $_view(zoom)"
2584	}
2585	}
2586	}
2587	}
2588	}
2589
2590	itcl::body Rappture::FlowvisViewer::FlowCmd { dataobj comp nbytes extents } {
2591	set tag "$dataobj-$comp"
2592	if { ![info exists _obj2flow($tag)] } {
2593	append cmd "flow add $tag\n"
2594	append cmd "$tag data follows $nbytes $extents\n"
2595	return $cmd
2596	}
2597	set flowobj $_obj2flow($tag)
2598	if { $flowobj == "" } {
2599	puts stderr "no flowobj"
2600	return ""
2601	}
2602	set cmd {}
2603	append cmd "if {\[flow exists $tag\]} {flow delete $tag}\n"
2604	array set info [$flowobj hints]
2605	set _settings($this-volume) $info(volume)
2606	set _settings($this-outline) $info(outline)
2607	set _settings($this-arrows) $info(arrows)
2608	set _settings($this-duration) $info(duration)
2609	$itk_component(speed) value $info(speed)
2610	append cmd "flow add $tag"
2611	append cmd " -position $info(position)"
2612	append cmd " -axis $info(axis)"
2613	append cmd " -volume $info(volume)"
2614	append cmd " -outline $info(outline)"
2615	append cmd " -slice $info(streams)"
2616	append cmd " -arrows $info(arrows)\n"
2617	foreach part [$flowobj particles] {
2618	array unset info
2619	array set info $part
2620	set color [Color2RGB $info(color)]
2621	append cmd "$tag particles add $info(name)"
2622	append cmd " -position $info(position)"
2623	append cmd " -hide $info(hide)"
2624	append cmd " -axis $info(axis)"
2625	append cmd " -color {$color}"
2626	append cmd " -size $info(size)\n"
2627	}
2628	foreach box [$flowobj boxes] {
2629	array unset info
2630	set info(corner1) ""
2631	set info(corner2) ""
2632	array set info $box
2633	if { $info(corner1) == "" \|\| $info(corner2) == "" } {
2634	continue
2635	}
2636	set color [Color2RGB $info(color)]
2637	append cmd "$tag box add $info(name)"
2638	append cmd " -color {$color}"
2639	append cmd " -hide $info(hide)"
2640	append cmd " -linewidth $info(linewidth) "
2641	append cmd " -corner1 {$info(corner1)} "
2642	append cmd " -corner2 {$info(corner2)}\n"
2643	}
2644	append cmd "$tag data follows $nbytes $extents\n"
2645	return $cmd
2646	}
2647
2648
2649	#
2650	# flow --
2651	#
2652	# Called when the user clicks on the stop or play buttons
2653	# for flow visualization.
2654	#
2655	# $this flow play
2656	# $this flow stop
2657	# $this flow toggle
2658	# $this flow reset
2659	# $this flow pause
2660	# $this flow next
2661	#
2662	itcl::body Rappture::FlowvisViewer::flow { args } {
2663	set option [lindex $args 0]
2664	switch -- $option {
2665	"goto2" {
2666	puts stderr "actually sending \"flow goto $_flow(goto)\""
2667	SendCmd "flow goto $_flow(goto)"
2668	set _gotoPending 0
2669	}
2670	"goto" {
2671	puts stderr "flow goto to $_settings($this-currenttime)"
2672	# Figure out how many steps to the current time based upon
2673	# the speed and duration.
2674	set current $_settings($this-currenttime)
2675	set speed [$itk_component(speed) value]
2676	set time [str2millisecs $_settings($this-duration)]
2677	$itk_component(dial) configure -max $time
2678	set delay [expr int(round(500.0/$speed))]
2679	set timePerStep [expr {double($time) / $delay}]
2680	set nSteps [expr {int(ceil($current/$timePerStep))}]
2681	EventuallyGoto $nSteps
2682	}
2683	"speed" {
2684	set speed [$itk_component(speed) value]
2685	set _flow(delay) [expr int(round(500.0/$speed))]
2686	}
2687	"duration" {
2688	set max [str2millisecs $_settings($this-duration)]
2689	if { $max < 0 } {
2690	bell
2691	return
2692	}
2693	set _flow(duration) $max
2694	set _settings($this-duration) [millisecs2str $max]
2695	$itk_component(dial) configure -max $max
2696	}
2697	"off" {
2698	set _flow(state) 0
2699	$_dispatcher cancel !play
2700	$itk_component(play) deselect
2701	}
2702	"on" {
2703	flow speed
2704	flow duration
2705	set _flow(state) 1
2706	set _settings($this-currenttime) 0
2707	$itk_component(play) select
2708	}
2709	"stop" {
2710	if { $_flow(state) } {
2711	flow off
2712	flow reset
2713	}
2714	}
2715	"pause" {
2716	if { $_flow(state) } {
2717	flow off
2718	}
2719	}
2720	"play" {
2721	# If the flow is currently off, then restart it.
2722	if { !$_flow(state) } {
2723	flow on
2724	# If we're at the end of the flow, reset the flow.
2725	set _settings($this-currenttime) \
2726	[expr {$_settings($this-currenttime) + $_flow(delay)}]
2727	if { $_settings($this-currenttime) >= $_flow(duration) } {
2728	set _settings($this-step) 1
2729	SendCmd "flow reset"
2730	}
2731	flow next
2732	}
2733	}
2734	"toggle" {
2735	if { $_settings($this-play) } {
2736	flow play
2737	} else {
2738	flow pause
2739	}
2740	}
2741	"reset" {
2742	set _settings($this-currenttime) 0
2743	SendCmd "flow reset"
2744	if { !$_flow(state) } {
2745	SendCmd "flow next"
2746	}
2747	}
2748	"next" {
2749	if { ![winfo viewable $itk_component(3dview)] } {
2750	flow stop
2751	return
2752	}
2753	set _settings($this-currenttime) \
2754	[expr {$_settings($this-currenttime) + $_flow(delay)}]
2755	if { $_settings($this-currenttime) >= $_flow(duration) } {
2756	if { !$_settings($this-loop) } {
2757	flow off
2758	return
2759	}
2760	flow reset
2761	} else {
2762	SendCmd "flow next"
2763	}
2764	$_dispatcher event -after $_flow(delay) !play
2765	}
2766	default {
2767	error "bad option \"$option\": should be play, stop, toggle, or reset."
2768	}
2769	}
2770	}
2771
2772	itcl::body Rappture::FlowvisViewer::WaitIcon { option widget } {
2773	switch -- $option {
2774	"start" {
2775	$_dispatcher dispatch $this !waiticon \
2776	"[itcl::code $this WaitIcon "next" $widget] ; list"
2777	set _icon 0
2778	$widget configure -image [Rappture::icon bigroller${_icon}]
2779	$_dispatcher event -after 100 !waiticon
2780	}
2781	"next" {
2782	incr _icon
2783	if { $_icon >= 8 } {
2784	set _icon 0
2785	}
2786	$widget configure -image [Rappture::icon bigroller${_icon}]
2787	$_dispatcher event -after 100 !waiticon
2788	}
2789	"stop" {
2790	$_dispatcher cancel !waiticon
2791	}
2792	}
2793	}
2794
2795	itcl::body Rappture::FlowvisViewer::GetPngImage { widget width height } {
2796	set token "print[incr _nextToken]"
2797	set var ::Rappture::FlowvisViewer::_hardcopy($this-$token)
2798	set $var ""
2799
2800	# Setup an automatic timeout procedure.
2801	$_dispatcher dispatch $this !pngtimeout "set $var {} ; list"
2802
2803	set popup .flowvisviewerprint
2804	if {![winfo exists $popup]} {
2805	Rappture::Balloon $popup -title "Generating file..."
2806	set inner [$popup component inner]
2807	label $inner.title -text "Generating hardcopy." -font "Arial 10 bold"
2808	label $inner.please -text "This may take a minute." -font "Arial 10"
2809	label $inner.icon -image [Rappture::icon bigroller0]
2810	button $inner.cancel -text "Cancel" -font "Arial 10 bold" \
2811	-command [list set $var ""]
2812	blt::table $inner \
2813	0,0 $inner.title -columnspan 2 \
2814	1,0 $inner.please -anchor w \
2815	1,1 $inner.icon -anchor e \
2816	2,0 $inner.cancel -columnspan 2
2817	blt::table configure $inner r0 -pady 4
2818	blt::table configure $inner r2 -pady 4
2819	bind $inner.cancel <KeyPress-Return> [list $inner.cancel invoke]
2820	} else {
2821	set inner [$popup component inner]
2822	}
2823
2824	$_dispatcher event -after 60000 !pngtimeout
2825	WaitIcon start $inner.icon
2826	grab set -local $inner
2827	focus $inner.cancel
2828
2829	SendCmd "print $token $width $height"
2830
2831	$popup activate $widget below
2832	update
2833	# We wait here for either
2834	# 1) the png to be delivered or
2835	# 2) timeout or
2836	# 3) user cancels the operation.
2837	tkwait variable $var
2838
2839	# Clean up.
2840	$_dispatcher cancel !pngtimeout
2841	WaitIcon stop $inner.icon
2842	grab release $inner
2843	$popup deactivate
2844	update
2845
2846	if { $_hardcopy($this-$token) != "" } {
2847	return [list .png $_hardcopy($this-$token)]
2848	}
2849	return ""
2850	}
2851
2852	itcl::body Rappture::FlowvisViewer::GetMovie { widget w h } {
2853	set token "movie[incr _nextToken]"
2854	set var ::Rappture::FlowvisViewer::_hardcopy($this-$token)
2855	set $var ""
2856
2857	# Setup an automatic timeout procedure.
2858	$_dispatcher dispatch $this !movietimeout "set $var {} ; list"
2859	set popup .flowvisviewermovie
2860	if {![winfo exists $popup]} {
2861	Rappture::Balloon $popup -title "Generating movie..."
2862	set inner [$popup component inner]
2863	label $inner.title -text "Generating movie for download" \
2864	-font "Arial 10 bold"
2865	label $inner.please -text "This may take a few minutes." \
2866	-font "Arial 10"
2867	label $inner.icon -image [Rappture::icon bigroller0]
2868	button $inner.cancel -text "Cancel" -font "Arial 10 bold" \
2869	-command [list set $var ""]
2870	blt::table $inner \
2871	0,0 $inner.title -columnspan 2 \
2872	1,0 $inner.please -anchor w \
2873	1,1 $inner.icon -anchor e \
2874	2,0 $inner.cancel -columnspan 2
2875	blt::table configure $inner r0 -pady 4
2876	blt::table configure $inner r2 -pady 4
2877	bind $inner.cancel <KeyPress-Return> [list $inner.cancel invoke]
2878	} else {
2879	set inner [$popup component inner]
2880	}
2881	# Timeout is set to 10 minutes.
2882	$_dispatcher event -after 600000 !movietimeout
2883	WaitIcon start $inner.icon
2884	grab set -local $inner
2885	focus $inner.cancel
2886
2887	flow duration
2888	flow speed
2889	set nframes [expr round($_flow(duration) / $_flow(delay))]
2890	set framerate [expr 1000.0 / $_flow(delay)]
2891
2892	# These are specific to MPEG1 video generation
2893	set framerate 25.0
2894	set bitrate 6.0e+6
2895
2896	set start [clock seconds]
2897	SendCmd "flow video $token -width $w -height $h -numframes $nframes "
2898
2899	$popup activate $widget below
2900	update
2901	# We wait here until
2902	# 1. the movie is delivered or
2903	# 2. we've timed out or
2904	# 3. the user has canceled the operation.b
2905	tkwait variable $var
2906
2907	puts stderr "Video generated in [expr [clock seconds] - $start] seconds."
2908
2909	# Clean up.
2910	$_dispatcher cancel !movietimeout
2911	WaitIcon stop $inner.icon
2912	grab release $inner
2913	$popup deactivate
2914	destroy $popup
2915	update
2916
2917	# This will both cancel the movie generation (if it hasn't already
2918	# completed) and reset the flow.
2919	SendCmd "flow reset"
2920	if { $_hardcopy($this-$token) != "" } {
2921	return [list .mpg $_hardcopy($this-$token)]
2922	}
2923	return ""
2924	}
2925
2926	itcl::body Rappture::FlowvisViewer::str2millisecs { value } {
2927	set parts [split $value :]
2928	set secs 0
2929	set mins 0
2930	if { [llength $parts] == 1 } {
2931	scan [lindex $parts 0] "%d" secs
2932	} else {
2933	scan [lindex $parts 1] "%d" secs
2934	scan [lindex $parts 0] "%d" mins
2935	}
2936	set ms [expr {(($mins * 60) + $secs) * 1000.0}]
2937	if { $ms > 600000.0 } {
2938	set ms 600000.0
2939	}
2940	if { $ms == 0.0 } {
2941	set ms 60000.0
2942	}
2943	return $ms
2944	}
2945
2946	itcl::body Rappture::FlowvisViewer::millisecs2str { value } {
2947	set min [expr floor($value / 60000.0)]
2948	set sec [expr ($value - ($min*60000.0)) / 1000.0]
2949	return [format %02d:%02d [expr round($min)] [expr round($sec)]]
2950	}
2951

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