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source: branches/blt4/gui/scripts/nanovisviewer.tcl @ 1719

Last change on this file since 1719 was 1719, checked in by gah, 14 years ago

File size: 64.6 KB

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1
2	# ----------------------------------------------------------------------
3	# COMPONENT: nanovisviewer - 3D volume rendering
4	#
5	# This widget performs volume rendering on 3D scalar/vector datasets.
6	# It connects to the Nanovis server running on a rendering farm,
7	# transmits data, and displays the results.
8	# ======================================================================
9	# AUTHOR: Michael McLennan, Purdue University
10	# Copyright (c) 2004-2005 Purdue Research Foundation
11	#
12	# See the file "license.terms" for information on usage and
13	# redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES.
14	# ======================================================================
15	package require Itk
16	package require BLT
17	#package require Img
18
19	#
20	# FIXME:
21	# Need to Add DX readers this client to examine the data before
22	# it's sent to the server. This will eliminate 90% of the insanity in
23	# computing the limits of all the volumes. I can rip out all the
24	# "receive data" "send transfer function" event crap.
25	#
26	# This means we can compute the transfer function (relative values) and
27	# draw the legend min/max values without waiting for the information to
28	# come from the server. This will also prevent the flashing that occurs
29	# when a new volume is drawn (using the default transfer function) and
30	# then when the correct transfer function has been sent and linked to
31	# the volume.
32	#
33	option add *NanovisViewer.width 4i widgetDefault
34	option add NanovisViewercursor crosshair widgetDefault
35	option add *NanovisViewer.height 4i widgetDefault
36	option add *NanovisViewer.foreground black widgetDefault
37	option add *NanovisViewer.controlBackground gray widgetDefault
38	option add *NanovisViewer.controlDarkBackground #999999 widgetDefault
39	option add *NanovisViewer.plotBackground black widgetDefault
40	option add *NanovisViewer.plotForeground white widgetDefault
41	option add *NanovisViewer.plotOutline gray widgetDefault
42	option add *NanovisViewer.font \
43	--helvetica-medium-r-normal--12-* widgetDefault
44
45	# must use this name -- plugs into Rappture::resources::load
46	proc NanovisViewer_init_resources {} {
47	Rappture::resources::register \
48	nanovis_server Rappture::NanovisViewer::SetServerList
49	}
50
51	itcl::class Rappture::NanovisViewer {
52	inherit Rappture::VisViewer
53
54	itk_option define -plotforeground plotForeground Foreground ""
55	itk_option define -plotbackground plotBackground Background ""
56	itk_option define -plotoutline plotOutline PlotOutline ""
57
58	constructor { hostlist args } {
59	Rappture::VisViewer::constructor $hostlist
60	} {
61	# defined below
62	}
63	destructor {
64	# defined below
65	}
66	public proc SetServerList { namelist } {
67	Rappture::VisViewer::SetServerList "nanovis" $namelist
68	}
69	public method add {dataobj {settings ""}}
70	public method camera {option args}
71	public method delete {args}
72	public method disconnect {}
73	public method download {option args}
74	public method get {args}
75	public method isconnected {}
76	public method limits { tf }
77	public method overmarker { m x }
78	public method sendto { string }
79	public method parameters {title args} {
80	# do nothing
81	}
82	public method rmdupmarker { m x }
83	public method scale {args}
84	public method snap { w h }
85	public method updatetransferfuncs {}
86
87	protected method Connect {}
88	protected method CurrentVolumes {{what -all}}
89	protected method Disconnect {}
90	protected method DoResize {}
91	protected method FixLegend {}
92	protected method FixSettings {what {value ""}}
93	protected method Pan {option x y}
94	protected method Rebuild {}
95	protected method ReceiveData { args }
96	protected method ReceiveImage { args }
97	protected method ReceiveLegend { tf vmin vmax size }
98	protected method Rotate {option x y}
99	protected method SendCmd {string}
100	protected method SendTransferFuncs {}
101	protected method Slice {option args}
102	protected method SlicerTip {axis}
103	protected method Zoom {option}
104
105	# The following methods are only used by this class.
106	private method AddIsoMarker { x y }
107	private method BuildCameraTab {}
108	private method BuildCutplanesTab {}
109	private method BuildViewTab {}
110	private method BuildVolumeTab {}
111	private method ComputeTransferFunc { tf }
112	private method EventuallyResize { w h }
113	private method EventuallyResizeLegend { }
114	private method NameTransferFunc { dataobj comp }
115	private method PanCamera {}
116	private method ParseLevelsOption { tf levels }
117	private method ParseMarkersOption { tf markers }
118	private method volume { tag name }
119	private method GetVolumeInfo { w }
120
121	private variable _outbuf ;# buffer for outgoing commands
122
123	private variable _dlist "" ;# list of data objects
124	private variable _allDataObjs
125	private variable _obj2ovride ;# maps dataobj => style override
126	private variable _serverVols ;# contains all the dataobj-component
127	;# to volumes in the server
128	private variable _serverTfs ;# contains all the transfer functions
129	;# in the server.
130	private variable _recvdVols ;# list of data objs to send to server
131	private variable _vol2style ;# maps dataobj-component to transfunc
132	private variable _style2vols ;# maps tf back to list of
133	# dataobj-components using the tf.
134
135	private variable _click ;# info used for rotate operations
136	private variable _limits ;# autoscale min/max for all axes
137	private variable _view ;# view params for 3D view
138	private variable _isomarkers ;# array of isosurface level values 0..1
139	private common _settings
140	# Array of transfer functions in server. If 0 the transfer has been
141	# defined but not loaded. If 1 the transfer function has been named
142	# and loaded.
143	private variable _activeTfs
144	private variable _first "" ;# This is the topmost volume.
145	private variable _buffering 0
146
147	# This
148	# indicates which isomarkers and transfer
149	# function to use when changing markers,
150	# opacity, or thickness.
151	common _downloadPopup ;# download options from popup
152	private common _hardcopy
153	private variable _width 0
154	private variable _height 0
155	private variable _resizePending 0
156	private variable _resizeLegendPending 0
157	}
158
159	itk::usual NanovisViewer {
160	keep -background -foreground -cursor -font
161	keep -plotbackground -plotforeground
162	}
163
164	# ----------------------------------------------------------------------
165	# CONSTRUCTOR
166	# ----------------------------------------------------------------------
167	itcl::body Rappture::NanovisViewer::constructor {hostlist args} {
168
169	# Draw legend event
170	$_dispatcher register !legend
171	$_dispatcher dispatch $this !legend "[itcl::code $this FixLegend]; list"
172
173	# Send transfer functions event
174	$_dispatcher register !send_transfunc
175	$_dispatcher dispatch $this !send_transfunc \
176	"[itcl::code $this SendTransferFuncs]; list"
177
178	# Rebuild event
179	$_dispatcher register !rebuild
180	$_dispatcher dispatch $this !rebuild "[itcl::code $this Rebuild]; list"
181
182	# Resize event
183	$_dispatcher register !resize
184	$_dispatcher dispatch $this !resize "[itcl::code $this DoResize]; list"
185
186	set _outbuf ""
187
188	#
189	# Populate parser with commands handle incoming requests
190	#
191	$_parser alias image [itcl::code $this ReceiveImage]
192	$_parser alias legend [itcl::code $this ReceiveLegend]
193	$_parser alias data [itcl::code $this ReceiveData]
194
195	# Initialize the view to some default parameters.
196	array set _view {
197	theta 45
198	phi 45
199	psi 0
200	zoom 1.0
201	pan-x 0
202	pan-y 0
203	}
204	set _limits(vmin) 0.0
205	set _limits(vmax) 1.0
206
207	array set _settings [subst {
208	$this-pan-x $_view(pan-x)
209	$this-pan-y $_view(pan-y)
210	$this-phi $_view(phi)
211	$this-psi $_view(psi)
212	$this-theta $_view(theta)
213	$this-volume 1
214	$this-xcutplane 0
215	$this-xcutposition 0
216	$this-ycutplane 0
217	$this-ycutposition 0
218	$this-zcutplane 0
219	$this-zcutposition 0
220	$this-zoom $_view(zoom)
221	}]
222
223	itk_component add 3dview {
224	label $itk_component(plotarea).vol -image $_image(plot) \
225	-highlightthickness 0 -borderwidth 0
226	} {
227	usual
228	ignore -highlightthickness -borderwidth -background
229	}
230
231	set f [$itk_component(main) component controls]
232	itk_component add reset {
233	button $f.reset -borderwidth 1 -padx 1 -pady 1 \
234	-highlightthickness 0 \
235	-image [Rappture::icon reset-view] \
236	-command [itcl::code $this Zoom reset]
237	} {
238	usual
239	ignore -highlightthickness
240	}
241	pack $itk_component(reset) -side top -padx 2 -pady 2
242	Rappture::Tooltip::for $itk_component(reset) "Reset the view to the default zoom level"
243
244	itk_component add zoomin {
245	button $f.zin -borderwidth 1 -padx 1 -pady 1 \
246	-highlightthickness 0 \
247	-image [Rappture::icon zoom-in] \
248	-command [itcl::code $this Zoom in]
249	} {
250	usual
251	ignore -highlightthickness
252	}
253	pack $itk_component(zoomin) -side top -padx 2 -pady 2
254	Rappture::Tooltip::for $itk_component(zoomin) "Zoom in"
255
256	itk_component add zoomout {
257	button $f.zout -borderwidth 1 -padx 1 -pady 1 \
258	-highlightthickness 0 \
259	-image [Rappture::icon zoom-out] \
260	-command [itcl::code $this Zoom out]
261	} {
262	usual
263	ignore -highlightthickness
264	}
265	pack $itk_component(zoomout) -side top -padx 2 -pady 2
266	Rappture::Tooltip::for $itk_component(zoomout) "Zoom out"
267
268	itk_component add volume {
269	Rappture::PushButton $f.volume \
270	-onimage [Rappture::icon volume-on] \
271	-offimage [Rappture::icon volume-off] \
272	-command [itcl::code $this FixSettings volume] \
273	-variable [itcl::scope _settings($this-volume)]
274	}
275	$itk_component(volume) select
276	Rappture::Tooltip::for $itk_component(volume) \
277	"Toggle the volume cloud on/off"
278	pack $itk_component(volume) -padx 2 -pady 2
279
280	BuildViewTab
281	BuildVolumeTab
282	BuildCutplanesTab
283	BuildCameraTab
284
285	# Legend
286
287	set _image(legend) [image create picture]
288	itk_component add legend {
289	canvas $itk_component(plotarea).legend -height 50 -highlightthickness 0
290	} {
291	usual
292	ignore -highlightthickness
293	rename -background -plotbackground plotBackground Background
294	}
295	bind $itk_component(legend) <Configure> \
296	[itcl::code $this EventuallyResizeLegend]
297
298	# Hack around the Tk panewindow. The problem is that the requested
299	# size of the 3d view isn't set until an image is retrieved from
300	# the server. So the panewindow uses the tiny size.
301	set w 10000
302	pack forget $itk_component(3dview)
303	blt::table $itk_component(plotarea) \
304	0,0 $itk_component(3dview) -fill both -reqwidth $w \
305	1,0 $itk_component(legend) -fill x
306	blt::table configure $itk_component(plotarea) r1 -resize none
307
308	# Bindings for rotation via mouse
309	bind $itk_component(3dview) <ButtonPress-1> \
310	[itcl::code $this Rotate click %x %y]
311	bind $itk_component(3dview) <B1-Motion> \
312	[itcl::code $this Rotate drag %x %y]
313	bind $itk_component(3dview) <ButtonRelease-1> \
314	[itcl::code $this Rotate release %x %y]
315	bind $itk_component(3dview) <Configure> \
316	[itcl::code $this EventuallyResize %w %h]
317
318	# Bindings for panning via mouse
319	bind $itk_component(3dview) <ButtonPress-2> \
320	[itcl::code $this Pan click %x %y]
321	bind $itk_component(3dview) <B2-Motion> \
322	[itcl::code $this Pan drag %x %y]
323	bind $itk_component(3dview) <ButtonRelease-2> \
324	[itcl::code $this Pan release %x %y]
325
326	# Bindings for panning via keyboard
327	bind $itk_component(3dview) <KeyPress-Left> \
328	[itcl::code $this Pan set -10 0]
329	bind $itk_component(3dview) <KeyPress-Right> \
330	[itcl::code $this Pan set 10 0]
331	bind $itk_component(3dview) <KeyPress-Up> \
332	[itcl::code $this Pan set 0 -10]
333	bind $itk_component(3dview) <KeyPress-Down> \
334	[itcl::code $this Pan set 0 10]
335	bind $itk_component(3dview) <Shift-KeyPress-Left> \
336	[itcl::code $this Pan set -2 0]
337	bind $itk_component(3dview) <Shift-KeyPress-Right> \
338	[itcl::code $this Pan set 2 0]
339	bind $itk_component(3dview) <Shift-KeyPress-Up> \
340	[itcl::code $this Pan set 0 -2]
341	bind $itk_component(3dview) <Shift-KeyPress-Down> \
342	[itcl::code $this Pan set 0 2]
343
344	# Bindings for zoom via keyboard
345	bind $itk_component(3dview) <KeyPress-Prior> \
346	[itcl::code $this Zoom out]
347	bind $itk_component(3dview) <KeyPress-Next> \
348	[itcl::code $this Zoom in]
349
350	bind $itk_component(3dview) <Enter> "focus $itk_component(3dview)"
351
352	if {[string equal "x11" [tk windowingsystem]]} {
353	# Bindings for zoom via mouse
354	bind $itk_component(3dview) <4> [itcl::code $this Zoom out]
355	bind $itk_component(3dview) <5> [itcl::code $this Zoom in]
356	}
357
358	set _image(download) [image create picture]
359
360	eval itk_initialize $args
361
362	Connect
363	}
364
365	# ----------------------------------------------------------------------
366	# DESTRUCTOR
367	# ----------------------------------------------------------------------
368	itcl::body Rappture::NanovisViewer::destructor {} {
369	$_dispatcher cancel !rebuild
370	$_dispatcher cancel !send_transfunc
371	$_dispatcher cancel !resize
372	image delete $_image(plot)
373	image delete $_image(legend)
374	image delete $_image(download)
375	array unset _settings $this-*
376	}
377
378	# ----------------------------------------------------------------------
379	# USAGE: add <dataobj> ?<settings>?
380	#
381	# Clients use this to add a data object to the plot. The optional
382	# <settings> are used to configure the plot. Allowed settings are
383	# -color, -brightness, -width, -linestyle, and -raise.
384	# ----------------------------------------------------------------------
385	itcl::body Rappture::NanovisViewer::add {dataobj {settings ""}} {
386	array set params {
387	-color auto
388	-width 1
389	-linestyle solid
390	-brightness 0
391	-raise 0
392	-description ""
393	-param ""
394	}
395	foreach {opt val} $settings {
396	if {![info exists params($opt)]} {
397	error "bad setting \"$opt\": should be [join [lsort [array names params]] {, }]"
398	}
399	set params($opt) $val
400	}
401	if {$params(-color) == "auto" \|\| $params(-color) == "autoreset"} {
402	# can't handle -autocolors yet
403	set params(-color) black
404	}
405	set pos [lsearch -exact $dataobj $_dlist]
406	if {$pos < 0} {
407	lappend _dlist $dataobj
408	set _allDataObjs($dataobj) 1
409	set _obj2ovride($dataobj-color) $params(-color)
410	set _obj2ovride($dataobj-width) $params(-width)
411	set _obj2ovride($dataobj-raise) $params(-raise)
412	$_dispatcher event -idle !rebuild
413	}
414	}
415
416	# ----------------------------------------------------------------------
417	# USAGE: get ?-objects?
418	# USAGE: get ?-image 3dview\|legend?
419	#
420	# Clients use this to query the list of objects being plotted, in
421	# order from bottom to top of this result. The optional "-image"
422	# flag can also request the internal images being shown.
423	# ----------------------------------------------------------------------
424	itcl::body Rappture::NanovisViewer::get {args} {
425	if {[llength $args] == 0} {
426	set args "-objects"
427	}
428
429	set op [lindex $args 0]
430	switch -- $op {
431	-objects {
432	# put the dataobj list in order according to -raise options
433	set dlist $_dlist
434	foreach obj $dlist {
435	if {[info exists _obj2ovride($obj-raise)] && $_obj2ovride($obj-raise)} {
436	set i [lsearch -exact $dlist $obj]
437	if {$i >= 0} {
438	set dlist [lreplace $dlist $i $i]
439	lappend dlist $obj
440	}
441	}
442	}
443	return $dlist
444	}
445	-image {
446	if {[llength $args] != 2} {
447	error "wrong # args: should be \"get -image 3dview\|legend\""
448	}
449	switch -- [lindex $args end] {
450	3dview {
451	return $_image(plot)
452	}
453	legend {
454	return $_image(legend)
455	}
456	default {
457	error "bad image name \"[lindex $args end]\": should be 3dview or legend"
458	}
459	}
460	}
461	default {
462	error "bad option \"$op\": should be -objects or -image"
463	}
464	}
465	}
466
467	# ----------------------------------------------------------------------
468	# USAGE: delete ?<dataobj1> <dataobj2> ...?
469	#
470	# Clients use this to delete a dataobj from the plot. If no dataobjs
471	# are specified, then all dataobjs are deleted. No data objects are
472	# deleted. They are only removed from the display list.
473	#
474	# ----------------------------------------------------------------------
475	itcl::body Rappture::NanovisViewer::delete {args} {
476	if {[llength $args] == 0} {
477	set args $_dlist
478	}
479	# Delete all specified dataobjs
480	set changed 0
481	foreach dataobj $args {
482	set pos [lsearch -exact $_dlist $dataobj]
483	if { $pos >= 0 } {
484	set _dlist [lreplace $_dlist $pos $pos]
485	array unset _limits $dataobj*
486	array unset _obj2ovride $dataobj-*
487	array unset _vol2style $dataobj-*
488	set changed 1
489	}
490	}
491	# If anything changed, then rebuild the plot
492	if {$changed} {
493	$_dispatcher event -idle !rebuild
494	}
495	}
496
497	# ----------------------------------------------------------------------
498	# USAGE: scale ?<data1> <data2> ...?
499	#
500	# Sets the default limits for the overall plot according to the
501	# limits of the data for all of the given <data> objects. This
502	# accounts for all objects--even those not showing on the screen.
503	# Because of this, the limits are appropriate for all objects as
504	# the user scans through data in the ResultSet viewer.
505	# ----------------------------------------------------------------------
506	itcl::body Rappture::NanovisViewer::scale {args} {
507	foreach val {xmin xmax ymin ymax zmin zmax vmin vmax} {
508	set _limits($val) ""
509	}
510	foreach obj $args {
511	foreach axis {x y z v} {
512
513	foreach { min max } [$obj limits $axis] break
514
515	if {"" != $min && "" != $max} {
516	if {"" == $_limits(${axis}min)} {
517	set _limits(${axis}min) $min
518	set _limits(${axis}max) $max
519	} else {
520	if {$min < $_limits(${axis}min)} {
521	set _limits(${axis}min) $min
522	}
523	if {$max > $_limits(${axis}max)} {
524	set _limits(${axis}max) $max
525	}
526	}
527	}
528	}
529	}
530	}
531
532	# ----------------------------------------------------------------------
533	# USAGE: download coming
534	# USAGE: download controls <downloadCommand>
535	# USAGE: download now
536	#
537	# Clients use this method to create a downloadable representation
538	# of the plot. Returns a list of the form {ext string}, where
539	# "ext" is the file extension (indicating the type of data) and
540	# "string" is the data itself.
541	# ----------------------------------------------------------------------
542	itcl::body Rappture::NanovisViewer::download {option args} {
543	switch $option {
544	coming {
545	if {[catch { $_image(download) snap $itk_component(plotarea)}]} {
546	$_image(download) blank #000000
547	}
548	}
549	controls {
550	# no controls for this download yet
551	return ""
552	}
553	now {
554	$_image(plot) export jpg -quality 100 -data bytes
555	return [list .jpg $bytes]
556	}
557	default {
558	error "bad option \"$option\": should be coming, controls, now"
559	}
560	}
561	}
562
563	# ----------------------------------------------------------------------
564	# USAGE: Connect ?<host:port>,<host:port>...?
565	#
566	# Clients use this method to establish a connection to a new
567	# server, or to reestablish a connection to the previous server.
568	# Any existing connection is automatically closed.
569	# ----------------------------------------------------------------------
570	itcl::body Rappture::NanovisViewer::Connect {} {
571	set _hosts [GetServerList "nanovis"]
572	if { "" == $_hosts } {
573	return 0
574	}
575	set result [VisViewer::Connect $_hosts]
576	if { $result } {
577	set w [winfo width $itk_component(3dview)]
578	set h [winfo height $itk_component(3dview)]
579	EventuallyResize $w $h
580	}
581	return $result
582	}
583
584	#
585	# isconnected --
586	#
587	# Indicates if we are currently connected to the visualization server.
588	#
589	itcl::body Rappture::NanovisViewer::isconnected {} {
590	return [VisViewer::IsConnected]
591	}
592
593	#
594	# disconnect --
595	#
596	itcl::body Rappture::NanovisViewer::disconnect {} {
597	Disconnect
598	}
599
600	#
601	# Disconnect --
602	#
603	# Clients use this method to disconnect from the current rendering
604	# server.
605	#
606	itcl::body Rappture::NanovisViewer::Disconnect {} {
607	VisViewer::Disconnect
608
609	# disconnected -- no more data sitting on server
610	set _outbuf ""
611	array unset _serverVols
612	}
613
614	#
615	# sendto --
616	#
617	itcl::body Rappture::NanovisViewer::sendto { bytes } {
618	SendBytes "$bytes\n"
619	}
620
621	#
622	# SendCmd
623	#
624	# Send commands off to the rendering server. If we're currently
625	# sending data objects to the server, buffer the commands to be
626	# sent later.
627	#
628	itcl::body Rappture::NanovisViewer::SendCmd {string} {
629	if { $_buffering } {
630	append _outbuf $string "\n"
631	} else {
632	foreach line [split $string \n] {
633	SendEcho >>line $line
634	}
635	SendBytes "$string\n"
636	}
637	}
638
639
640	# ----------------------------------------------------------------------
641	# USAGE: SendTransferFuncs
642	# ----------------------------------------------------------------------
643	itcl::body Rappture::NanovisViewer::SendTransferFuncs {} {
644	if { $_first == "" } {
645	puts stderr "first not set"
646	return
647	}
648	# Insure that the global opacity and thickness settings (in the slider
649	# settings widgets) are used for the active transfer-function. Update
650	# the values in the _settings varible.
651	set opacity [expr { double($_settings($this-opacity)) * 0.01 }]
652	# Scale values between 0.00001 and 0.01000
653	set thickness [expr {double($_settings($this-thickness)) * 0.0001}]
654
655	foreach vol [CurrentVolumes] {
656	if { ![info exists _serverVols($vol)] \|\| !$_serverVols($vol) } {
657	# The volume hasn't reached the server yet. How did we get
658	# here?
659	continue
660	}
661	if { ![info exists _vol2style($vol)] } {
662	puts stderr "unknown volume $vol"
663	continue; # How does this happen?
664	}
665	set tf $_vol2style($vol)
666	set _settings($this-$tf-opacity) $opacity
667	set _settings($this-$tf-thickness) $thickness
668	ComputeTransferFunc $tf
669	# FIXME: Need to the send information as to what transfer functions
670	# to update so that we only update the transfer function
671	# as necessary. Right now, all transfer functions are
672	# updated. This makes moving the isomarker slider chunky.
673	if { ![info exists _activeTfs($tf)] \|\| !$_activeTfs($tf) } {
674	set _activeTfs($tf) 1
675	}
676	SendCmd "volume shading transfunc $tf $vol"
677	}
678	FixLegend
679	}
680
681	# ----------------------------------------------------------------------
682	# USAGE: ReceiveImage -bytes <size> -type <type> -token <token>
683	#
684	# Invoked automatically whenever the "image" command comes in from
685	# the rendering server. Indicates that binary image data with the
686	# specified <size> will follow.
687	# ----------------------------------------------------------------------
688	itcl::body Rappture::NanovisViewer::ReceiveImage { args } {
689	array set info {
690	-token "???"
691	-bytes 0
692	-type image
693	}
694	array set info $args
695	set bytes [ReceiveBytes $info(-bytes)]
696	ReceiveEcho <<line "<read $info(-bytes) bytes"
697	if { $info(-type) == "image" } {
698	ReceiveEcho "for [image width $_image(plot)]x[image height $_image(plot)] image>"
699	$_image(plot) configure -data $bytes
700	} elseif { $info(type) == "print" } {
701	set tag $this-print-$info(-token)
702	set _hardcopy($tag) $bytes
703	}
704	}
705
706	#
707	# ReceiveLegend --
708	#
709	# The procedure is the response from the render server to each "legend"
710	# command. The server sends back a "legend" command invoked our
711	# the slave interpreter. The purpose is to collect data of the image
712	# representing the legend in the canvas. In addition, the isomarkers
713	# of the active transfer function are displayed.
714	#
715	# I don't know is this is the right place to display the isomarkers.
716	# I don't know all the different paths used to draw the plot. There's
717	# "Rebuild", "add", etc.
718	#
719	itcl::body Rappture::NanovisViewer::ReceiveLegend { tf vmin vmax size } {
720	if { ![isconnected] } {
721	return
722	}
723	set bytes [ReceiveBytes $size]
724	$_image(legend) configure -data $bytes
725	ReceiveEcho <<line "<read $size bytes for [image width $_image(legend)]x[image height $_image(legend)] legend>"
726
727	set c $itk_component(legend)
728	set w [winfo width $c]
729	set h [winfo height $c]
730	set lx 10
731	set ly [expr {$h - 1}]
732	if {"" == [$c find withtag transfunc]} {
733	$c create image 10 10 -anchor nw \
734	-image $_image(legend) -tags transfunc
735	$c create text $lx $ly -anchor sw \
736	-fill $itk_option(-plotforeground) -tags "limits vmin"
737	$c create text [expr {$w-$lx}] $ly -anchor se \
738	-fill $itk_option(-plotforeground) -tags "limits vmax"
739	$c lower transfunc
740	$c bind transfunc <ButtonRelease-1> \
741	[itcl::code $this AddIsoMarker %x %y]
742	}
743	# Display the markers used by the active transfer function.
744
745	array set limits [limits $tf]
746	$c itemconfigure vmin -text [format %.2g $limits(min)]
747	$c coords vmin $lx $ly
748
749	$c itemconfigure vmax -text [format %.2g $limits(max)]
750	$c coords vmax [expr {$w-$lx}] $ly
751
752	if { [info exists _isomarkers($tf)] } {
753	foreach m $_isomarkers($tf) {
754	$m visible yes
755	}
756	}
757	}
758
759	#
760	# ReceiveData --
761	#
762	# The procedure is the response from the render server to each "data
763	# follows" command. The server sends back a "data" command invoked our
764	# the slave interpreter. The purpose is to collect the min/max of the
765	# volume sent to the render server. Since the client (nanovisviewer)
766	# doesn't parse 3D data formats, we rely on the server (nanovis) to
767	# tell us what the limits are. Once we've received the limits to all
768	# the data we've sent (tracked by _recvdVols) we can then determine
769	# what the transfer functions are for these volumes.
770	#
771	#
772	# Note: There is a considerable tradeoff in having the server report
773	# back what the data limits are. It means that much of the code
774	# having to do with transfer-functions has to wait for the data
775	# to come back, since the isomarkers are calculated based upon
776	# the data limits. The client code is much messier because of
777	# this. The alternative is to parse any of the 3D formats on the
778	# client side.
779	#
780	itcl::body Rappture::NanovisViewer::ReceiveData { args } {
781	if { ![isconnected] } {
782	return
783	}
784	# Arguments from server are name value pairs. Stuff them in an array.
785	array set info $args
786
787	set tag $info(tag)
788	set parts [split $tag -]
789
790	#
791	# Volumes don't exist until we're told about them.
792	#
793	set dataobj [lindex $parts 0]
794	set _serverVols($tag) 1
795	if { $_settings($this-volume) && $dataobj == $_first } {
796	SendCmd "volume state 1 $tag"
797	}
798	set _limits($tag-min) $info(min); # Minimum value of the volume.
799	set _limits($tag-max) $info(max); # Maximum value of the volume.
800	set _limits(vmin) $info(vmin); # Overall minimum value.
801	set _limits(vmax) $info(vmax); # Overall maximum value.
802
803	unset _recvdVols($tag)
804	if { [array size _recvdVols] == 0 } {
805	# The active transfer function is by default the first component of
806	# the first data object. This assumes that the data is always
807	# successfully transferred.
808	updatetransferfuncs
809	}
810	}
811
812	# ----------------------------------------------------------------------
813	# USAGE: Rebuild
814	#
815	# Called automatically whenever something changes that affects the
816	# data in the widget. Clears any existing data and rebuilds the
817	# widget to display new data.
818	# ----------------------------------------------------------------------
819	itcl::body Rappture::NanovisViewer::Rebuild {} {
820
821	# Turn on buffering of commands to the server. We don't want to
822	# be preempted by a server disconnect/reconnect (which automatically
823	# generates a new call to Rebuild).
824	set _buffering 1
825
826	# Hide all the isomarkers. Can't remove them. Have to remember the
827	# settings since the user may have created/deleted/moved markers.
828
829	foreach tf [array names _isomarkers] {
830	foreach m $_isomarkers($tf) {
831	$m visible no
832	}
833	}
834
835	set w [winfo width $itk_component(3dview)]
836	set h [winfo height $itk_component(3dview)]
837	EventuallyResize $w $h
838
839	foreach dataobj [get] {
840	foreach comp [$dataobj components] {
841	set vol $dataobj-$comp
842	if { ![info exists _serverVols($vol)] } {
843	# Send the data as one huge base64-encoded mess -- yuck!
844	set data [$dataobj values $comp]
845	set nbytes [string length $data]
846	append _outbuf "volume data follows $nbytes $vol\n"
847	append _outbuf $data
848	set _recvdVols($vol) 1
849	set _serverVols($vol) 0
850	}
851	NameTransferFunc $dataobj $comp
852	}
853	}
854	#
855	# Reset the camera and other view parameters
856	#
857
858	set _settings($this-theta) $_view(theta)
859	set _settings($this-phi) $_view(phi)
860	set _settings($this-psi) $_view(psi)
861	set _settings($this-pan-x) $_view(pan-x)
862	set _settings($this-pan-y) $_view(pan-y)
863	set _settings($this-zoom) $_view(zoom)
864
865	set xyz [Euler2XYZ $_view(theta) $_view(phi) $_view(psi)]
866	SendCmd "camera angle $xyz"
867	PanCamera
868	SendCmd "camera zoom $_view(zoom)"
869	FixSettings light
870	FixSettings transp
871	FixSettings isosurface
872	FixSettings grid
873	FixSettings axes
874	FixSettings outline
875
876	# nothing to send -- activate the proper ivol
877	SendCmd "volume state 0"
878	set _first [lindex [get] 0]
879	if {"" != $_first} {
880	set axis [$_first hints updir]
881	if { "" != $axis } {
882	SendCmd "up $axis"
883	}
884	set location [$_first hints camera]
885	if { $location != "" } {
886	array set _view $location
887	}
888	set vols [array names _serverVols $_first-*]
889	if { $vols != "" } {
890	SendCmd "volume state 1 $vols"
891	}
892	}
893	# If the first volume already exists on the server, then make sure we
894	# display the proper transfer function in the legend.
895	set comp [lindex [$_first components] 0]
896	if { [info exists _serverVols($_first-$comp)] } {
897	updatetransferfuncs
898	}
899
900	# Sync the state of slicers
901	set vols [CurrentVolumes -cutplanes]
902	foreach axis {x y z} {
903	SendCmd "cutplane state $_settings($this-${axis}cutplane) $axis $vols"
904	set pos [expr {0.01*$_settings($this-${axis}cutposition)}]
905	SendCmd "cutplane position $pos $axis $vols"
906	}
907	SendCmd "volume data state $_settings($this-volume) $vols"
908	set _buffering 0; # Turn off buffering.
909	# Actually write the commands to the server socket. If it fails, we don't
910	# care. We're finished here.
911	blt::busy hold $itk_component(hull)
912	SendBytes $_outbuf;
913	blt::busy release $itk_component(hull)
914	set _outbuf ""; # Clear the buffer.
915	}
916
917	# ----------------------------------------------------------------------
918	# USAGE: CurrentVolumes ?-cutplanes?
919	#
920	# Returns a list of volume server IDs for the current volume being
921	# displayed. This is normally a single ID, but it might be a list
922	# of IDs if the current data object has multiple components.
923	# ----------------------------------------------------------------------
924	itcl::body Rappture::NanovisViewer::CurrentVolumes {{what -all}} {
925	set rlist ""
926	if { $_first == "" } {
927	return
928	}
929	foreach comp [$_first components] {
930	set vol $_first-$comp
931	if { [info exists _serverVols($vol)] && $_serverVols($vol) } {
932	array set style {
933	-cutplanes 1
934	}
935	array set style [lindex [$_first components -style $comp] 0]
936	if {$what != "-cutplanes" \|\| $style(-cutplanes)} {
937	lappend rlist $vol
938	}
939	}
940	}
941	return $rlist
942	}
943
944	# ----------------------------------------------------------------------
945	# USAGE: Zoom in
946	# USAGE: Zoom out
947	# USAGE: Zoom reset
948	#
949	# Called automatically when the user clicks on one of the zoom
950	# controls for this widget. Changes the zoom for the current view.
951	# ----------------------------------------------------------------------
952	itcl::body Rappture::NanovisViewer::Zoom {option} {
953	switch -- $option {
954	"in" {
955	set _view(zoom) [expr {$_view(zoom)*1.25}]
956	set _settings($this-zoom) $_view(zoom)
957	}
958	"out" {
959	set _view(zoom) [expr {$_view(zoom)*0.8}]
960	set _settings($this-zoom) $_view(zoom)
961	}
962	"reset" {
963	array set _view {
964	theta 45
965	phi 45
966	psi 0
967	zoom 1.0
968	pan-x 0
969	pan-y 0
970	}
971	if { $_first != "" } {
972	set location [$_first hints camera]
973	if { $location != "" } {
974	array set _view $location
975	}
976	}
977	set xyz [Euler2XYZ $_view(theta) $_view(phi) $_view(psi)]
978	SendCmd "camera angle $xyz"
979	PanCamera
980	set _settings($this-theta) $_view(theta)
981	set _settings($this-phi) $_view(phi)
982	set _settings($this-psi) $_view(psi)
983	set _settings($this-pan-x) $_view(pan-x)
984	set _settings($this-pan-y) $_view(pan-y)
985	set _settings($this-zoom) $_view(zoom)
986	}
987	}
988	SendCmd "camera zoom $_view(zoom)"
989	}
990
991	itcl::body Rappture::NanovisViewer::PanCamera {} {
992	#set x [expr ($_view(pan-x)) / $_limits(xrange)]
993	#set y [expr ($_view(pan-y)) / $_limits(yrange)]
994	set x $_view(pan-x)
995	set y $_view(pan-y)
996	SendCmd "camera pan $x $y"
997	}
998
999
1000	# ----------------------------------------------------------------------
1001	# USAGE: Rotate click <x> <y>
1002	# USAGE: Rotate drag <x> <y>
1003	# USAGE: Rotate release <x> <y>
1004	#
1005	# Called automatically when the user clicks/drags/releases in the
1006	# plot area. Moves the plot according to the user's actions.
1007	# ----------------------------------------------------------------------
1008	itcl::body Rappture::NanovisViewer::Rotate {option x y} {
1009	switch -- $option {
1010	click {
1011	$itk_component(3dview) configure -cursor fleur
1012	set _click(x) $x
1013	set _click(y) $y
1014	set _click(theta) $_view(theta)
1015	set _click(phi) $_view(phi)
1016	}
1017	drag {
1018	if {[array size _click] == 0} {
1019	Rotate click $x $y
1020	} else {
1021	set w [winfo width $itk_component(3dview)]
1022	set h [winfo height $itk_component(3dview)]
1023	if {$w <= 0 \|\| $h <= 0} {
1024	return
1025	}
1026
1027	if {[catch {
1028	# this fails sometimes for no apparent reason
1029	set dx [expr {double($x-$_click(x))/$w}]
1030	set dy [expr {double($y-$_click(y))/$h}]
1031	}]} {
1032	return
1033	}
1034
1035	#
1036	# Rotate the camera in 3D
1037	#
1038	if {$_view(psi) > 90 \|\| $_view(psi) < -90} {
1039	# when psi is flipped around, theta moves backwards
1040	set dy [expr {-$dy}]
1041	}
1042	set theta [expr {$_view(theta) - $dy*180}]
1043	while {$theta < 0} { set theta [expr {$theta+180}] }
1044	while {$theta > 180} { set theta [expr {$theta-180}] }
1045
1046	if {abs($theta) >= 30 && abs($theta) <= 160} {
1047	set phi [expr {$_view(phi) - $dx*360}]
1048	while {$phi < 0} { set phi [expr {$phi+360}] }
1049	while {$phi > 360} { set phi [expr {$phi-360}] }
1050	set psi $_view(psi)
1051	} else {
1052	set phi $_view(phi)
1053	set psi [expr {$_view(psi) - $dx*360}]
1054	while {$psi < -180} { set psi [expr {$psi+360}] }
1055	while {$psi > 180} { set psi [expr {$psi-360}] }
1056	}
1057
1058	set _view(theta) $theta
1059	set _view(phi) $phi
1060	set _view(psi) $psi
1061	set xyz [Euler2XYZ $theta $phi $psi]
1062	set _settings($this-theta) $_view(theta)
1063	set _settings($this-phi) $_view(phi)
1064	set _settings($this-psi) $_view(psi)
1065	SendCmd "camera angle $xyz"
1066	set _click(x) $x
1067	set _click(y) $y
1068	}
1069	}
1070	release {
1071	Rotate drag $x $y
1072	$itk_component(3dview) configure -cursor ""
1073	catch {unset _click}
1074	}
1075	default {
1076	error "bad option \"$option\": should be click, drag, release"
1077	}
1078	}
1079	}
1080
1081	# ----------------------------------------------------------------------
1082	# USAGE: $this Pan click x y
1083	# $this Pan drag x y
1084	# $this Pan release x y
1085	#
1086	# Called automatically when the user clicks on one of the zoom
1087	# controls for this widget. Changes the zoom for the current view.
1088	# ----------------------------------------------------------------------
1089	itcl::body Rappture::NanovisViewer::Pan {option x y} {
1090	# Experimental stuff
1091	set w [winfo width $itk_component(3dview)]
1092	set h [winfo height $itk_component(3dview)]
1093	if { $option == "set" } {
1094	set x [expr $x / double($w)]
1095	set y [expr $y / double($h)]
1096	set _view(pan-x) [expr $_view(pan-x) + $x]
1097	set _view(pan-y) [expr $_view(pan-y) + $y]
1098	PanCamera
1099	set _settings($this-pan-x) $_view(pan-x)
1100	set _settings($this-pan-y) $_view(pan-y)
1101	return
1102	}
1103	if { $option == "click" } {
1104	set _click(x) $x
1105	set _click(y) $y
1106	$itk_component(3dview) configure -cursor hand1
1107	}
1108	if { $option == "drag" \|\| $option == "release" } {
1109	set dx [expr ($_click(x) - $x)/double($w)]
1110	set dy [expr ($_click(y) - $y)/double($h)]
1111	set _click(x) $x
1112	set _click(y) $y
1113	set _view(pan-x) [expr $_view(pan-x) - $dx]
1114	set _view(pan-y) [expr $_view(pan-y) - $dy]
1115	PanCamera
1116	set _settings($this-pan-x) $_view(pan-x)
1117	set _settings($this-pan-y) $_view(pan-y)
1118	}
1119	if { $option == "release" } {
1120	$itk_component(3dview) configure -cursor ""
1121	}
1122	}
1123
1124	# ----------------------------------------------------------------------
1125	# USAGE: FixSettings <what> ?<value>?
1126	#
1127	# Used internally to update rendering settings whenever parameters
1128	# change in the popup settings panel. Sends the new settings off
1129	# to the back end.
1130	# ----------------------------------------------------------------------
1131	itcl::body Rappture::NanovisViewer::FixSettings {what {value ""}} {
1132	switch -- $what {
1133	light {
1134	if {[isconnected]} {
1135	set val $_settings($this-light)
1136	set sval [expr {0.1*$val}]
1137	SendCmd "volume shading diffuse $sval"
1138	set sval [expr {sqrt($val+1.0)}]
1139	SendCmd "volume shading specular $sval"
1140	}
1141	}
1142	transp {
1143	if {[isconnected]} {
1144	set val $_settings($this-transp)
1145	set sval [expr {0.2*$val+1}]
1146	SendCmd "volume shading opacity $sval"
1147	}
1148	}
1149	opacity {
1150	if {[isconnected] && [array size _activeTfs] > 0 } {
1151	set val $_settings($this-opacity)
1152	set sval [expr { 0.01 * double($val) }]
1153	foreach tf [array names _activeTfs] {
1154	set _settings($this-$tf-opacity) $sval
1155	set _activeTfs($tf) 0
1156	}
1157	updatetransferfuncs
1158	}
1159	}
1160
1161	thickness {
1162	if {[isconnected] && [array names _activeTfs] > 0 } {
1163	set val $_settings($this-thickness)
1164	# Scale values between 0.00001 and 0.01000
1165	set sval [expr {0.0001*double($val)}]
1166	foreach tf [array names _activeTfs] {
1167	set _settings($this-$tf-thickness) $sval
1168	set _activeTfs($tf) 0
1169	}
1170	updatetransferfuncs
1171	}
1172	}
1173	"outline" {
1174	if {[isconnected]} {
1175	SendCmd "volume outline state $_settings($this-outline)"
1176	}
1177	}
1178	"isosurface" {
1179	if {[isconnected]} {
1180	SendCmd "volume shading isosurface $_settings($this-isosurface)"
1181	}
1182	}
1183	"grid" {
1184	if { [isconnected] } {
1185	SendCmd "grid visible $_settings($this-grid)"
1186	}
1187	}
1188	"axes" {
1189	if { [isconnected] } {
1190	SendCmd "axis visible $_settings($this-axes)"
1191	}
1192	}
1193	"legend" {
1194	if { $_settings($this-legend) } {
1195	blt::table $itk_component(plotarea) \
1196	0,0 $itk_component(3dview) -fill both \
1197	1,0 $itk_component(legend) -fill x
1198	blt::table configure $itk_component(plotarea) r1 -resize none
1199	} else {
1200	blt::table forget $itk_component(legend)
1201	}
1202	}
1203	"volume" {
1204	if { [isconnected] } {
1205	set vols [CurrentVolumes -cutplanes]
1206	SendCmd "volume data state $_settings($this-volume) $vols"
1207	}
1208	}
1209	"xcutplane" - "ycutplane" - "zcutplane" {
1210	set axis [string range $what 0 0]
1211	set bool $_settings($this-$what)
1212	if { [isconnected] } {
1213	set vols [CurrentVolumes -cutplanes]
1214	SendCmd "cutplane state $bool $axis $vols"
1215	}
1216	if { $bool } {
1217	$itk_component(${axis}CutScale) configure -state normal \
1218	-troughcolor white
1219	} else {
1220	$itk_component(${axis}CutScale) configure -state disabled \
1221	-troughcolor grey82
1222	}
1223	}
1224	default {
1225	error "don't know how to fix $what"
1226	}
1227	}
1228	}
1229
1230	# ----------------------------------------------------------------------
1231	# USAGE: FixLegend
1232	#
1233	# Used internally to update the legend area whenever it changes size
1234	# or when the field changes. Asks the server to send a new legend
1235	# for the current field.
1236	# ----------------------------------------------------------------------
1237	itcl::body Rappture::NanovisViewer::FixLegend {} {
1238	set _resizeLegendPending 0
1239	set lineht [font metrics $itk_option(-font) -linespace]
1240	set w [expr {$_width-20}]
1241	set h [expr {[winfo height $itk_component(legend)]-20-$lineht}]
1242	if {$w > 0 && $h > 0 && [array names _activeTfs] > 0 && $_first != "" } {
1243	set vol [lindex [CurrentVolumes] 0]
1244	if { [info exists _vol2style($vol)] } {
1245	SendCmd "legend $_vol2style($vol) $w $h"
1246	}
1247	} else {
1248	# Can't do this as this will remove the items associated with the
1249	# isomarkers.
1250
1251	#$itk_component(legend) delete all
1252	}
1253	}
1254
1255	#
1256	# NameTransferFunc --
1257	#
1258	# Creates a transfer function name based on the <style> settings in the
1259	# library run.xml file. This placeholder will be used later to create
1260	# and send the actual transfer function once the data info has been sent
1261	# to us by the render server. [We won't know the volume limits until the
1262	# server parses the 3D data and sends back the limits via ReceiveData.]
1263	#
1264	# FIXME: The current way we generate transfer-function names completely
1265	# ignores the -markers option. The problem is that we are forced
1266	# to compute the name from an increasing complex set of values:
1267	# color, levels, marker, opacity. I think we're stuck doing it
1268	# now.
1269	#
1270	itcl::body Rappture::NanovisViewer::NameTransferFunc { dataobj comp } {
1271	array set style {
1272	-color rainbow
1273	-levels 6
1274	-opacity 1.0
1275	}
1276	array set style [lindex [$dataobj components -style $comp] 0]
1277	set tf "$style(-color):$style(-levels):$style(-opacity)"
1278	set _vol2style($dataobj-$comp) $tf
1279	lappend _style2vols($tf) $dataobj-$comp
1280	return $tf
1281	}
1282
1283	#
1284	# ComputeTransferFunc --
1285	#
1286	# Computes and sends the transfer function to the render server. It's
1287	# assumed that the volume data limits are known and that the global
1288	# transfer-functions slider values have be setup. Both parts are
1289	# needed to compute the relative value (location) of the marker, and
1290	# the alpha map of the transfer function.
1291	#
1292	itcl::body Rappture::NanovisViewer::ComputeTransferFunc { tf } {
1293	array set style {
1294	-color rainbow
1295	-levels 6
1296	-opacity 1.0
1297	}
1298	foreach {dataobj comp} [split $_style2vols($tf) -] break
1299	array set style [lindex [$dataobj components -style $comp] 0]
1300
1301
1302	# We have to parse the style attributes for a volume using this
1303	# transfer-function once. This sets up the initial isomarkers for the
1304	# transfer function. The user may add/delete markers, so we have to
1305	# maintain a list of markers for each transfer-function. We use the one
1306	# of the volumes (the first in the list) using the transfer-function as a
1307	# reference.
1308	#
1309	# FIXME: The current way we generate transfer-function names completely
1310	# ignores the -markers option. The problem is that we are forced
1311	# to compute the name from an increasing complex set of values:
1312	# color, levels, marker, opacity. I think the cow's out of the
1313	# barn on this one.
1314
1315	if { ![info exists _isomarkers($tf)] } {
1316	# Have to defer creation of isomarkers until we have data limits
1317	if { [info exists style(-markers)] } {
1318	ParseMarkersOption $tf $style(-markers)
1319	} else {
1320	ParseLevelsOption $tf $style(-levels)
1321	}
1322	}
1323	if {$style(-color) == "rainbow"} {
1324	set style(-color) "white:yellow:green:cyan:blue:magenta"
1325	}
1326	set clist [split $style(-color) :]
1327	set cmap "0.0 [Color2RGB white] "
1328	for {set i 0} {$i < [llength $clist]} {incr i} {
1329	set x [expr {double($i+1)/([llength $clist]+1)}]
1330	set color [lindex $clist $i]
1331	append cmap "$x [Color2RGB $color] "
1332	}
1333	append cmap "1.0 [Color2RGB $color]"
1334
1335	set tag $this-$tf
1336	if { ![info exists _settings($tag-opacity)] } {
1337	set _settings($tag-opacity) $style(-opacity)
1338	}
1339	set max $_settings($tag-opacity)
1340
1341	set isovalues {}
1342	foreach m $_isomarkers($tf) {
1343	lappend isovalues [$m relval]
1344	}
1345	# Sort the isovalues
1346	set isovalues [lsort -real $isovalues]
1347
1348	if { ![info exists _settings($tag-thickness)]} {
1349	set _settings($tag-thickness) 0.05
1350	}
1351	set delta $_settings($tag-thickness)
1352
1353	set first [lindex $isovalues 0]
1354	set last [lindex $isovalues end]
1355	set wmap ""
1356	if { $first == "" \|\| $first != 0.0 } {
1357	lappend wmap 0.0 0.0
1358	}
1359	foreach x $isovalues {
1360	set x1 [expr {$x-$delta-0.00001}]
1361	set x2 [expr {$x-$delta}]
1362	set x3 [expr {$x+$delta}]
1363	set x4 [expr {$x+$delta+0.00001}]
1364	if { $x1 < 0.0 } {
1365	set x1 0.0
1366	} elseif { $x1 > 1.0 } {
1367	set x1 1.0
1368	}
1369	if { $x2 < 0.0 } {
1370	set x2 0.0
1371	} elseif { $x2 > 1.0 } {
1372	set x2 1.0
1373	}
1374	if { $x3 < 0.0 } {
1375	set x3 0.0
1376	} elseif { $x3 > 1.0 } {
1377	set x3 1.0
1378	}
1379	if { $x4 < 0.0 } {
1380	set x4 0.0
1381	} elseif { $x4 > 1.0 } {
1382	set x4 1.0
1383	}
1384	# add spikes in the middle
1385	lappend wmap $x1 0.0
1386	lappend wmap $x2 $max
1387	lappend wmap $x3 $max
1388	lappend wmap $x4 0.0
1389	}
1390	if { $last == "" \|\| $last != 1.0 } {
1391	lappend wmap 1.0 0.0
1392	}
1393	SendCmd "transfunc define $tf { $cmap } { $wmap }"
1394	}
1395
1396	# ----------------------------------------------------------------------
1397	# CONFIGURATION OPTION: -plotbackground
1398	# ----------------------------------------------------------------------
1399	itcl::configbody Rappture::NanovisViewer::plotbackground {
1400	if { [isconnected] } {
1401	foreach {r g b} [Color2RGB $itk_option(-plotbackground)] break
1402	#fix this!
1403	#SendCmd "color background $r $g $b"
1404	}
1405	}
1406
1407	# ----------------------------------------------------------------------
1408	# CONFIGURATION OPTION: -plotforeground
1409	# ----------------------------------------------------------------------
1410	itcl::configbody Rappture::NanovisViewer::plotforeground {
1411	if { [isconnected] } {
1412	foreach {r g b} [Color2RGB $itk_option(-plotforeground)] break
1413	#fix this!
1414	#SendCmd "color background $r $g $b"
1415	}
1416	}
1417
1418	# ----------------------------------------------------------------------
1419	# CONFIGURATION OPTION: -plotoutline
1420	# ----------------------------------------------------------------------
1421	itcl::configbody Rappture::NanovisViewer::plotoutline {
1422	# Must check if we are connected because this routine is called from the
1423	# class body when the -plotoutline itk_option is defined. At that point
1424	# the NanovisViewer class constructor hasn't been called, so we can't
1425	# start sending commands to visualization server.
1426	if { [isconnected] } {
1427	if {"" == $itk_option(-plotoutline)} {
1428	SendCmd "volume outline state off"
1429	} else {
1430	SendCmd "volume outline state on"
1431	SendCmd "volume outline color [Color2RGB $itk_option(-plotoutline)]"
1432	}
1433	}
1434	}
1435
1436	#
1437	# The -levels option takes a single value that represents the number
1438	# of evenly distributed markers based on the current data range. Each
1439	# marker is a relative value from 0.0 to 1.0.
1440	#
1441	itcl::body Rappture::NanovisViewer::ParseLevelsOption { tf levels } {
1442	set c $itk_component(legend)
1443	regsub -all "," $levels " " levels
1444	if {[string is int $levels]} {
1445	for {set i 1} { $i <= $levels } {incr i} {
1446	set x [expr {double($i)/($levels+1)}]
1447	set m [Rappture::IsoMarker \#auto $c $this $tf]
1448	$m relval $x
1449	lappend _isomarkers($tf) $m
1450	}
1451	} else {
1452	foreach x $levels {
1453	set m [Rappture::IsoMarker \#auto $c $this $tf]
1454	$m relval $x
1455	lappend _isomarkers($tf) $m
1456	}
1457	}
1458	}
1459
1460	#
1461	# The -markers option takes a list of zero or more values (the values
1462	# may be separated either by spaces or commas) that have the following
1463	# format:
1464	#
1465	# N% Percent of current total data range. Converted to
1466	# to a relative value between 0.0 and 1.0.
1467	# N Absolute value of marker. If the marker is outside of
1468	# the current range, it will be displayed on the outer
1469	# edge of the legends, but it range it represents will
1470	# not be seen.
1471	#
1472	itcl::body Rappture::NanovisViewer::ParseMarkersOption { tf markers } {
1473	set c $itk_component(legend)
1474	regsub -all "," $markers " " markers
1475	foreach marker $markers {
1476	set n [scan $marker "%g%s" value suffix]
1477	if { $n == 2 && $suffix == "%" } {
1478	# ${n}% : Set relative value.
1479	set value [expr {$value * 0.01}]
1480	set m [Rappture::IsoMarker \#auto $c $this $tf]
1481	$m relval $value
1482	lappend _isomarkers($tf) $m
1483	} else {
1484	# ${n} : Set absolute value.
1485	set m [Rappture::IsoMarker \#auto $c $this $tf]
1486	$m absval $value
1487	lappend _isomarkers($tf) $m
1488	}
1489	}
1490	}
1491
1492	# ----------------------------------------------------------------------
1493	# USAGE: UndateTransferFuncs
1494	# ----------------------------------------------------------------------
1495	itcl::body Rappture::NanovisViewer::updatetransferfuncs {} {
1496	$_dispatcher event -idle !send_transfunc
1497	}
1498
1499	itcl::body Rappture::NanovisViewer::AddIsoMarker { x y } {
1500	if { $_first == "" } {
1501	error "active transfer function isn't set"
1502	}
1503	set vol [lindex [CurrentVolumes] 0]
1504	set tf $_vol2style($vol)
1505	set c $itk_component(legend)
1506	set m [Rappture::IsoMarker \#auto $c $this $tf]
1507	set w [winfo width $c]
1508	$m relval [expr {double($x-10)/($w-20)}]
1509	lappend _isomarkers($tf) $m
1510	updatetransferfuncs
1511	return 1
1512	}
1513
1514	itcl::body Rappture::NanovisViewer::rmdupmarker { marker x } {
1515	set tf [$marker transferfunc]
1516	set bool 0
1517	if { [info exists _isomarkers($tf)] } {
1518	set list {}
1519	set marker [namespace tail $marker]
1520	foreach m $_isomarkers($tf) {
1521	set sx [$m screenpos]
1522	if { $m != $marker } {
1523	if { $x >= ($sx-3) && $x <= ($sx+3) } {
1524	$marker relval [$m relval]
1525	itcl::delete object $m
1526	bell
1527	set bool 1
1528	continue
1529	}
1530	}
1531	lappend list $m
1532	}
1533	set _isomarkers($tf) $list
1534	updatetransferfuncs
1535	}
1536	return $bool
1537	}
1538
1539	itcl::body Rappture::NanovisViewer::overmarker { marker x } {
1540	set tf [$marker transferfunc]
1541	if { [info exists _isomarkers($tf)] } {
1542	set marker [namespace tail $marker]
1543	foreach m $_isomarkers($tf) {
1544	set sx [$m screenpos]
1545	if { $m != $marker } {
1546	set bool [expr { $x >= ($sx-3) && $x <= ($sx+3) }]
1547	$m activate $bool
1548	}
1549	}
1550	}
1551	return ""
1552	}
1553
1554	itcl::body Rappture::NanovisViewer::limits { tf } {
1555	set _limits(min) 0.0
1556	set _limits(max) 1.0
1557	if { ![info exists _style2vols($tf)] } {
1558	return [array get _limits]
1559	}
1560	set min ""; set max ""
1561	foreach vol $_style2vols($tf) {
1562	if { ![info exists _serverVols($vol)] } {
1563	continue
1564	}
1565	if { ![info exists _limits($vol-min)] } {
1566	continue
1567	}
1568	if { $min == "" \|\| $min > $_limits($vol-min) } {
1569	set min $_limits($vol-min)
1570	}
1571	if { $max == "" \|\| $max < $_limits($vol-max) } {
1572	set max $_limits($vol-max)
1573	}
1574	}
1575	if { $min != "" } {
1576	set _limits(min) $min
1577	}
1578	if { $max != "" } {
1579	set _limits(max) $max
1580	}
1581	return [array get _limits]
1582	}
1583
1584
1585	itcl::body Rappture::NanovisViewer::BuildViewTab {} {
1586	foreach { key value } {
1587	grid 0
1588	axes 1
1589	outline 1
1590	volume 1
1591	legend 1
1592	particles 1
1593	lic 1
1594	} {
1595	set _settings($this-$key) $value
1596	}
1597
1598	set fg [option get $itk_component(hull) font Font]
1599	#set bfg [option get $itk_component(hull) boldFont Font]
1600
1601	set inner [$itk_component(main) insert end \
1602	-title "View Settings" \
1603	-icon [Rappture::icon wrench]]
1604	$inner configure -borderwidth 4
1605
1606	set ::Rappture::NanovisViewer::_settings($this-isosurface) 0
1607	checkbutton $inner.isosurface \
1608	-text "Isosurface shading" \
1609	-variable [itcl::scope _settings($this-isosurface)] \
1610	-command [itcl::code $this FixSettings isosurface] \
1611	-font "Arial 9"
1612
1613	checkbutton $inner.axes \
1614	-text "Axes" \
1615	-variable [itcl::scope _settings($this-axes)] \
1616	-command [itcl::code $this FixSettings axes] \
1617	-font "Arial 9"
1618
1619	checkbutton $inner.grid \
1620	-text "Grid" \
1621	-variable [itcl::scope _settings($this-grid)] \
1622	-command [itcl::code $this FixSettings grid] \
1623	-font "Arial 9"
1624
1625	checkbutton $inner.outline \
1626	-text "Outline" \
1627	-variable [itcl::scope _settings($this-outline)] \
1628	-command [itcl::code $this FixSettings outline] \
1629	-font "Arial 9"
1630
1631	checkbutton $inner.legend \
1632	-text "Legend" \
1633	-variable [itcl::scope _settings($this-legend)] \
1634	-command [itcl::code $this FixSettings legend] \
1635	-font "Arial 9"
1636
1637	checkbutton $inner.volume \
1638	-text "Volume" \
1639	-variable [itcl::scope _settings($this-volume)] \
1640	-command [itcl::code $this FixSettings volume] \
1641	-font "Arial 9"
1642
1643	blt::table $inner \
1644	0,0 $inner.axes -columnspan 2 -anchor w \
1645	1,0 $inner.grid -columnspan 2 -anchor w \
1646	2,0 $inner.outline -columnspan 2 -anchor w \
1647	3,0 $inner.volume -columnspan 2 -anchor w \
1648	4,0 $inner.legend -columnspan 2 -anchor w
1649
1650	if 0 {
1651	bind $inner <Map> [itcl::code $this GetVolumeInfo $inner]
1652	}
1653	blt::table configure $inner r* -resize none
1654	blt::table configure $inner r5 -resize expand
1655	}
1656
1657	itcl::body Rappture::NanovisViewer::BuildVolumeTab {} {
1658	foreach { key value } {
1659	light 40
1660	transp 50
1661	opacity 100
1662	thickness 350
1663	} {
1664	set _settings($this-$key) $value
1665	}
1666
1667	set inner [$itk_component(main) insert end \
1668	-title "Volume Settings" \
1669	-icon [Rappture::icon volume-on]]
1670	$inner configure -borderwidth 4
1671
1672	set fg [option get $itk_component(hull) font Font]
1673	#set bfg [option get $itk_component(hull) boldFont Font]
1674
1675	checkbutton $inner.vol -text "Show volume" -font $fg \
1676	-variable [itcl::scope _settings($this-volume)] \
1677	-command [itcl::code $this FixSettings volume]
1678	label $inner.shading -text "Shading:" -font $fg
1679
1680	label $inner.dim -text "Dim" -font $fg
1681	::scale $inner.light -from 0 -to 100 -orient horizontal \
1682	-variable [itcl::scope _settings($this-light)] \
1683	-width 10 \
1684	-showvalue off -command [itcl::code $this FixSettings light]
1685	label $inner.bright -text "Bright" -font $fg
1686
1687	label $inner.fog -text "Fog" -font $fg
1688	::scale $inner.transp -from 0 -to 100 -orient horizontal \
1689	-variable [itcl::scope _settings($this-transp)] \
1690	-width 10 \
1691	-showvalue off -command [itcl::code $this FixSettings transp]
1692	label $inner.plastic -text "Plastic" -font $fg
1693
1694	label $inner.clear -text "Clear" -font $fg
1695	::scale $inner.opacity -from 0 -to 100 -orient horizontal \
1696	-variable [itcl::scope _settings($this-opacity)] \
1697	-width 10 \
1698	-showvalue off -command [itcl::code $this FixSettings opacity]
1699	label $inner.opaque -text "Opaque" -font $fg
1700
1701	label $inner.thin -text "Thin" -font $fg
1702	::scale $inner.thickness -from 0 -to 1000 -orient horizontal \
1703	-variable [itcl::scope _settings($this-thickness)] \
1704	-width 10 \
1705	-showvalue off -command [itcl::code $this FixSettings thickness]
1706	label $inner.thick -text "Thick" -font $fg
1707
1708	blt::table $inner \
1709	0,0 $inner.vol -columnspan 4 -anchor w -pady 2 \
1710	1,0 $inner.shading -columnspan 4 -anchor w -pady {10 2} \
1711	2,0 $inner.dim -anchor e -pady 2 \
1712	2,1 $inner.light -columnspan 2 -pady 2 -fill x \
1713	2,3 $inner.bright -anchor w -pady 2 \
1714	3,0 $inner.fog -anchor e -pady 2 \
1715	3,1 $inner.transp -columnspan 2 -pady 2 -fill x \
1716	3,3 $inner.plastic -anchor w -pady 2 \
1717	4,0 $inner.clear -anchor e -pady 2 \
1718	4,1 $inner.opacity -columnspan 2 -pady 2 -fill x\
1719	4,3 $inner.opaque -anchor w -pady 2 \
1720	5,0 $inner.thin -anchor e -pady 2 \
1721	5,1 $inner.thickness -columnspan 2 -pady 2 -fill x\
1722	5,3 $inner.thick -anchor w -pady 2
1723
1724	blt::table configure $inner c0 c1 c3 r* -resize none
1725	blt::table configure $inner r6 -resize expand
1726	}
1727
1728	itcl::body Rappture::NanovisViewer::BuildCutplanesTab {} {
1729	set inner [$itk_component(main) insert end \
1730	-title "Cutplane Settings" \
1731	-icon [Rappture::icon cutbutton]]
1732	$inner configure -borderwidth 4
1733
1734	# X-value slicer...
1735	itk_component add xCutButton {
1736	Rappture::PushButton $inner.xbutton \
1737	-onimage [Rappture::icon x-cutplane] \
1738	-offimage [Rappture::icon x-cutplane] \
1739	-command [itcl::code $this FixSettings xcutplane] \
1740	-variable [itcl::scope _settings($this-xcutplane)]
1741	}
1742	Rappture::Tooltip::for $itk_component(xCutButton) \
1743	"Toggle the X cut plane on/off"
1744
1745	itk_component add xCutScale {
1746	::scale $inner.xval -from 100 -to 0 \
1747	-width 10 -orient vertical -showvalue off \
1748	-borderwidth 1 -highlightthickness 0 \
1749	-command [itcl::code $this Slice move x] \
1750	-variable [itcl::scope _settings($this-xcutposition)]
1751	} {
1752	usual
1753	ignore -borderwidth -highlightthickness
1754	}
1755	# Set the default cutplane value before disabling the scale.
1756	$itk_component(xCutScale) set 50
1757	$itk_component(xCutScale) configure -state disabled
1758	Rappture::Tooltip::for $itk_component(xCutScale) \
1759	"@[itcl::code $this SlicerTip x]"
1760
1761	# Y-value slicer...
1762	itk_component add yCutButton {
1763	Rappture::PushButton $inner.ybutton \
1764	-onimage [Rappture::icon y-cutplane] \
1765	-offimage [Rappture::icon y-cutplane] \
1766	-command [itcl::code $this FixSettings ycutplane] \
1767	-variable [itcl::scope _settings($this-ycutplane)]
1768	}
1769	Rappture::Tooltip::for $itk_component(yCutButton) \
1770	"Toggle the Y cut plane on/off"
1771
1772	itk_component add yCutScale {
1773	::scale $inner.yval -from 100 -to 0 \
1774	-width 10 -orient vertical -showvalue off \
1775	-borderwidth 1 -highlightthickness 0 \
1776	-command [itcl::code $this Slice move y] \
1777	-variable [itcl::scope _settings($this-ycutposition)]
1778	} {
1779	usual
1780	ignore -borderwidth -highlightthickness
1781	}
1782	Rappture::Tooltip::for $itk_component(yCutScale) \
1783	"@[itcl::code $this SlicerTip y]"
1784	# Set the default cutplane value before disabling the scale.
1785	$itk_component(yCutScale) set 50
1786	$itk_component(yCutScale) configure -state disabled
1787
1788	# Z-value slicer...
1789	itk_component add zCutButton {
1790	Rappture::PushButton $inner.zbutton \
1791	-onimage [Rappture::icon z-cutplane] \
1792	-offimage [Rappture::icon z-cutplane] \
1793	-command [itcl::code $this FixSettings zcutplane] \
1794	-variable [itcl::scope _settings($this-zcutplane)]
1795	}
1796	Rappture::Tooltip::for $itk_component(zCutButton) \
1797	"Toggle the Z cut plane on/off"
1798
1799	itk_component add zCutScale {
1800	::scale $inner.zval -from 100 -to 0 \
1801	-width 10 -orient vertical -showvalue off \
1802	-borderwidth 1 -highlightthickness 0 \
1803	-command [itcl::code $this Slice move z] \
1804	-variable [itcl::scope _settings($this-zcutposition)]
1805	} {
1806	usual
1807	ignore -borderwidth -highlightthickness
1808	}
1809	$itk_component(zCutScale) set 50
1810	$itk_component(zCutScale) configure -state disabled
1811	#$itk_component(zCutScale) configure -state disabled
1812	Rappture::Tooltip::for $itk_component(zCutScale) \
1813	"@[itcl::code $this SlicerTip z]"
1814
1815	blt::table $inner \
1816	1,1 $itk_component(xCutButton) \
1817	1,2 $itk_component(yCutButton) \
1818	1,3 $itk_component(zCutButton) \
1819	0,1 $itk_component(xCutScale) \
1820	0,2 $itk_component(yCutScale) \
1821	0,3 $itk_component(zCutScale) \
1822
1823	blt::table configure $inner r0 r1 c* -resize none
1824	blt::table configure $inner r2 c4 -resize expand
1825	blt::table configure $inner c0 -width 2
1826	blt::table configure $inner c1 c2 c3 -padx 2
1827	}
1828
1829	itcl::body Rappture::NanovisViewer::BuildCameraTab {} {
1830	set inner [$itk_component(main) insert end \
1831	-title "Camera Settings" \
1832	-icon [Rappture::icon camera]]
1833	$inner configure -borderwidth 4
1834
1835	set labels { phi theta psi pan-x pan-y zoom }
1836	set row 0
1837	foreach tag $labels {
1838	label $inner.${tag}label -text $tag -font "Arial 9"
1839	entry $inner.${tag} -font "Arial 9" -bg white \
1840	-textvariable [itcl::scope _settings($this-$tag)]
1841	bind $inner.${tag} <KeyPress-Return> \
1842	[itcl::code $this camera set ${tag}]
1843	blt::table $inner \
1844	$row,0 $inner.${tag}label -anchor e -pady 2 \
1845	$row,1 $inner.${tag} -anchor w -pady 2
1846	blt::table configure $inner r$row -resize none
1847	incr row
1848	}
1849	blt::table configure $inner c0 c1 -resize none
1850	blt::table configure $inner c2 -resize expand
1851	blt::table configure $inner r$row -resize expand
1852	}
1853
1854
1855	# ----------------------------------------------------------------------
1856	# USAGE: Slice move x\|y\|z <newval>
1857	#
1858	# Called automatically when the user drags the slider to move the
1859	# cut plane that slices 3D data. Gets the current value from the
1860	# slider and moves the cut plane to the appropriate point in the
1861	# data set.
1862	# ----------------------------------------------------------------------
1863	itcl::body Rappture::NanovisViewer::Slice {option args} {
1864	switch -- $option {
1865	move {
1866	if {[llength $args] != 2} {
1867	error "wrong # args: should be \"Slice move x\|y\|z newval\""
1868	}
1869	set axis [lindex $args 0]
1870	set newval [lindex $args 1]
1871
1872	set newpos [expr {0.01*$newval}]
1873	set vols [CurrentVolumes -cutplanes]
1874	SendCmd "cutplane position $newpos $axis $vols"
1875	}
1876	default {
1877	error "bad option \"$option\": should be axis, move, or volume"
1878	}
1879	}
1880	}
1881
1882	# ----------------------------------------------------------------------
1883	# USAGE: SlicerTip <axis>
1884	#
1885	# Used internally to generate a tooltip for the x/y/z slicer controls.
1886	# Returns a message that includes the current slicer value.
1887	# ----------------------------------------------------------------------
1888	itcl::body Rappture::NanovisViewer::SlicerTip {axis} {
1889	set val [$itk_component(${axis}CutScale) get]
1890	# set val [expr {0.01*($val-50)
1891	# *($_limits(${axis}max)-$_limits(${axis}min))
1892	# + 0.5*($_limits(${axis}max)+$_limits(${axis}min))}]
1893	return "Move the [string toupper $axis] cut plane.\nCurrently: $axis = $val%"
1894	}
1895
1896
1897	itcl::body Rappture::NanovisViewer::DoResize {} {
1898	SendCmd "screen $_width $_height"
1899	set _resizePending 0
1900	}
1901
1902	itcl::body Rappture::NanovisViewer::EventuallyResize { w h } {
1903	set _width $w
1904	set _height $h
1905	if { !$_resizePending } {
1906	$_dispatcher event -idle !resize
1907	set _resizePending 1
1908	}
1909	}
1910
1911	itcl::body Rappture::NanovisViewer::EventuallyResizeLegend {} {
1912	if { !$_resizeLegendPending } {
1913	$_dispatcher event -idle !legend
1914	set _resizeLegendPending 1
1915	}
1916	}
1917
1918
1919	# camera --
1920	#
1921	itcl::body Rappture::NanovisViewer::camera {option args} {
1922	switch -- $option {
1923	"show" {
1924	puts [array get _view]
1925	}
1926	"set" {
1927	set who [lindex $args 0]
1928	set x $_settings($this-$who)
1929	set code [catch { string is double $x } result]
1930	if { $code != 0 \|\| !$result } {
1931	set _settings($this-$who) $_view($who)
1932	return
1933	}
1934	switch -- $who {
1935	"pan-x" - "pan-y" {
1936	set _view($who) $_settings($this-$who)
1937	PanCamera
1938	}
1939	"phi" - "theta" - "psi" {
1940	set _view($who) $_settings($this-$who)
1941	set xyz [Euler2XYZ $_view(theta) $_view(phi) $_view(psi)]
1942	SendCmd "camera angle $xyz"
1943	}
1944	"zoom" {
1945	set _view($who) $_settings($this-$who)
1946	SendCmd "camera zoom $_view(zoom)"
1947	}
1948	}
1949	}
1950	}
1951	}
1952
1953	itcl::body Rappture::NanovisViewer::GetVolumeInfo { w } {
1954	set flowobj ""
1955	foreach key [array names _obj2flow] {
1956	set flowobj $_obj2flow($key)
1957	break
1958	}
1959	if { $flowobj == "" } {
1960	return
1961	}
1962	if { [winfo exists $w.frame] } {
1963	destroy $w.frame
1964	}
1965	set inner [frame $w.frame]
1966	blt::table $w \
1967	5,0 $inner -fill both -columnspan 2 -anchor nw
1968	array set hints [$dataobj hints]
1969
1970	label $inner.volumes -text "Volumes" -font "Arial 9 bold"
1971	blt::table $inner \
1972	1,0 $inner.volumes -anchor w \
1973	blt::table configure $inner c0 c1 -resize none
1974	blt::table configure $inner c2 -resize expand
1975
1976	set row 3
1977	set volumes [get]
1978	if { [llength $volumes] > 0 } {
1979	blt::table $inner $row,0 $inner.volumes -anchor w
1980	incr row
1981	}
1982	foreach vol $volumes {
1983	array unset info
1984	array set info $vol
1985	set name $info(name)
1986	if { ![info exists _settings($this-volume-$name)] } {
1987	set _settings($this-volume-$name) $info(hide)
1988	}
1989	checkbutton $inner.vol$row -text $info(label) \
1990	-variable [itcl::scope _settings($this-volume-$name)] \
1991	-onvalue 0 -offvalue 1 \
1992	-command [itcl::code $this volume $key $name] \
1993	-font "Arial 9"
1994	Rappture::Tooltip::for $inner.vol$row $info(description)
1995	blt::table $inner $row,0 $inner.vol$row -anchor w
1996	if { !$_settings($this-volume-$name) } {
1997	$inner.vol$row select
1998	}
1999	incr row
2000	}
2001	blt::table configure $inner r* -resize none
2002	blt::table configure $inner r$row -resize expand
2003	blt::table configure $inner c3 -resize expand
2004	event generate [winfo parent [winfo parent $w]] <Configure>
2005	}
2006
2007	itcl::body Rappture::NanovisViewer::volume { tag name } {
2008	set bool $_settings($this-volume-$name)
2009	SendCmd "volume statue $bool $name"
2010	}
2011
2012
2013	itcl::body Rappture::NanovisViewer::snap { w h } {
2014	if { $w <= 0 \|\| $h <= 0 } {
2015	set w [image width $_image(plot)]
2016	set h [image height $_image(plot)]
2017	}
2018	set img [image create picture -width $w -height $h]
2019	$img resample $_image(plot)
2020	return $img
2021	}

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