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source: trunk/gui/scripts/nanovisviewer.tcl @ 3498

Last change on this file since 3498 was 3498, checked in by ldelgass, 12 years ago
Delay Rebuild until window size larger than 1x1 - copying this code from VTK viewers to nanovis viewers. Helps get proper aspect for initial camera reset. There is still a problem with the updir coming too late (needs to come before camera reset).
File size: 74.8 KB

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1	# -- mode: tcl; indent-tabs-mode: nil --
2
3	# ----------------------------------------------------------------------
4	# COMPONENT: nanovisviewer - 3D volume rendering
5	#
6	# This widget performs volume rendering on 3D scalar/vector datasets.
7	# It connects to the Nanovis server running on a rendering farm,
8	# transmits data, and displays the results.
9	# ======================================================================
10	# AUTHOR: Michael McLennan, Purdue University
11	# Copyright (c) 2004-2012 HUBzero Foundation, LLC
12	#
13	# See the file "license.terms" for information on usage and
14	# redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES.
15	# ======================================================================
16	package require Itk
17	package require BLT
18	package require Img
19
20	#
21	# FIXME:
22	# Need to Add DX readers this client to examine the data before
23	# it's sent to the server. This will eliminate 90% of the insanity in
24	# computing the limits of all the volumes. I can rip out all the
25	# "receive data" "send transfer function" event crap.
26	#
27	# This means we can compute the transfer function (relative values) and
28	# draw the legend min/max values without waiting for the information to
29	# come from the server. This will also prevent the flashing that occurs
30	# when a new volume is drawn (using the default transfer function) and
31	# then when the correct transfer function has been sent and linked to
32	# the volume.
33	#
34	option add *NanovisViewer.width 4i widgetDefault
35	option add NanovisViewercursor crosshair widgetDefault
36	option add *NanovisViewer.height 4i widgetDefault
37	option add *NanovisViewer.foreground black widgetDefault
38	option add *NanovisViewer.controlBackground gray widgetDefault
39	option add *NanovisViewer.controlDarkBackground #999999 widgetDefault
40	option add *NanovisViewer.plotBackground black widgetDefault
41	option add *NanovisViewer.plotForeground white widgetDefault
42	option add *NanovisViewer.plotOutline gray widgetDefault
43	option add *NanovisViewer.font \
44	--helvetica-medium-r-normal--12-* widgetDefault
45
46	# must use this name -- plugs into Rappture::resources::load
47	proc NanovisViewer_init_resources {} {
48	Rappture::resources::register \
49	nanovis_server Rappture::NanovisViewer::SetServerList
50	}
51
52	itcl::class Rappture::NanovisViewer {
53	inherit Rappture::VisViewer
54
55	itk_option define -plotforeground plotForeground Foreground ""
56	itk_option define -plotbackground plotBackground Background ""
57	itk_option define -plotoutline plotOutline PlotOutline ""
58
59	constructor { hostlist args } {
60	Rappture::VisViewer::constructor $hostlist
61	} {
62	# defined below
63	}
64	destructor {
65	# defined below
66	}
67	public proc SetServerList { namelist } {
68	Rappture::VisViewer::SetServerList "nanovis" $namelist
69	}
70	public method add {dataobj {settings ""}}
71	public method camera {option args}
72	public method delete {args}
73	public method disconnect {}
74	public method download {option args}
75	public method get {args}
76	public method isconnected {}
77	public method limits { tf }
78	public method overmarker { m x }
79	public method parameters {title args} {
80	# do nothing
81	}
82	public method rmdupmarker { m x }
83	public method scale {args}
84	public method updatetransferfuncs {}
85
86	protected method Connect {}
87	protected method CurrentDatasets {{what -all}}
88	protected method Disconnect {}
89	protected method DoResize {}
90	protected method FixLegend {}
91	protected method AdjustSetting {what {value ""}}
92	protected method InitSettings { args }
93	protected method Pan {option x y}
94	protected method Rebuild {}
95	protected method ReceiveData { args }
96	protected method ReceiveImage { args }
97	protected method ReceiveLegend { tf vmin vmax size }
98	protected method Rotate {option x y}
99	protected method SendTransferFuncs {}
100	protected method Slice {option args}
101	protected method SlicerTip {axis}
102	protected method Zoom {option}
103
104	# The following methods are only used by this class.
105	private method AddIsoMarker { x y }
106	private method BuildCameraTab {}
107	private method BuildCutplanesTab {}
108	private method BuildViewTab {}
109	private method BuildVolumeTab {}
110	private method ResetColormap { color }
111	private method ComputeTransferFunc { tf }
112	private method EventuallyResize { w h }
113	private method EventuallyResizeLegend { }
114	private method NameTransferFunc { dataobj comp }
115	private method PanCamera {}
116	private method ParseLevelsOption { tf levels }
117	private method ParseMarkersOption { tf markers }
118	private method volume { tag name }
119	private method GetVolumeInfo { w }
120	private method SetOrientation {}
121
122	private variable _arcball ""
123
124	private variable _dlist "" ;# list of data objects
125	private variable _allDataObjs
126	private variable _obj2ovride ;# maps dataobj => style override
127	private variable _serverDatasets ;# contains all the dataobj-component
128	;# to volumes in the server
129	private variable _serverTfs ;# contains all the transfer functions
130	;# in the server.
131	private variable _recvdDatasets ;# list of data objs to send to server
132	private variable _dataset2style ;# maps dataobj-component to transfunc
133	private variable _style2datasets ;# maps tf back to list of
134	# dataobj-components using the tf.
135
136	private variable _reset 1; # Connection to server has been reset
137	private variable _click ;# info used for rotate operations
138	private variable _limits ;# autoscale min/max for all axes
139	private variable _view ;# view params for 3D view
140	private variable _isomarkers ;# array of isosurface level values 0..1
141	private variable _settings
142	# Array of transfer functions in server. If 0 the transfer has been
143	# defined but not loaded. If 1 the transfer function has been named
144	# and loaded.
145	private variable _activeTfs
146	private variable _first "" ;# This is the topmost volume.
147
148	# This
149	# indicates which isomarkers and transfer
150	# function to use when changing markers,
151	# opacity, or thickness.
152	common _downloadPopup ;# download options from popup
153	private common _hardcopy
154	private variable _width 0
155	private variable _height 0
156	private variable _resizePending 0
157	private variable _resizeLegendPending 0
158	}
159
160	itk::usual NanovisViewer {
161	keep -background -foreground -cursor -font
162	keep -plotbackground -plotforeground
163	}
164
165	# ----------------------------------------------------------------------
166	# CONSTRUCTOR
167	# ----------------------------------------------------------------------
168	itcl::body Rappture::NanovisViewer::constructor {hostlist args} {
169	set _serverType "nanovis"
170
171	# Draw legend event
172	$_dispatcher register !legend
173	$_dispatcher dispatch $this !legend "[itcl::code $this FixLegend]; list"
174
175	# Send transfer functions event
176	$_dispatcher register !send_transfunc
177	$_dispatcher dispatch $this !send_transfunc \
178	"[itcl::code $this SendTransferFuncs]; list"
179
180	# Rebuild event
181	$_dispatcher register !rebuild
182	$_dispatcher dispatch $this !rebuild "[itcl::code $this Rebuild]; list"
183
184	# Resize event
185	$_dispatcher register !resize
186	$_dispatcher dispatch $this !resize "[itcl::code $this DoResize]; list"
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	qw 0.853553
198	qx -0.353553
199	qy 0.353553
200	qz 0.146447
201	zoom 1.0
202	pan-x 0
203	pan-y 0
204	}
205	set _arcball [blt::arcball create 100 100]
206	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
207	$_arcball quaternion $q
208
209	set _limits(vmin) 0.0
210	set _limits(vmax) 1.0
211	set _reset 1
212
213	array set _settings [subst {
214	$this-qw $_view(qw)
215	$this-qx $_view(qx)
216	$this-qy $_view(qy)
217	$this-qz $_view(qz)
218	$this-zoom $_view(zoom)
219	$this-pan-x $_view(pan-x)
220	$this-pan-y $_view(pan-y)
221	$this-volume 1
222	$this-xcutplane 0
223	$this-xcutposition 0
224	$this-ycutplane 0
225	$this-ycutposition 0
226	$this-zcutplane 0
227	$this-zcutposition 0
228	}]
229
230	itk_component add 3dview {
231	label $itk_component(plotarea).view -image $_image(plot) \
232	-highlightthickness 0 -borderwidth 0
233	} {
234	usual
235	ignore -highlightthickness -borderwidth -background
236	}
237	bind $itk_component(3dview) <Control-F1> [itcl::code $this ToggleConsole]
238
239	set f [$itk_component(main) component controls]
240	itk_component add reset {
241	button $f.reset -borderwidth 1 -padx 1 -pady 1 \
242	-highlightthickness 0 \
243	-image [Rappture::icon reset-view] \
244	-command [itcl::code $this Zoom reset]
245	} {
246	usual
247	ignore -highlightthickness
248	}
249	pack $itk_component(reset) -side top -padx 2 -pady 2
250	Rappture::Tooltip::for $itk_component(reset) "Reset the view to the default zoom level"
251
252	itk_component add zoomin {
253	button $f.zin -borderwidth 1 -padx 1 -pady 1 \
254	-highlightthickness 0 \
255	-image [Rappture::icon zoom-in] \
256	-command [itcl::code $this Zoom in]
257	} {
258	usual
259	ignore -highlightthickness
260	}
261	pack $itk_component(zoomin) -side top -padx 2 -pady 2
262	Rappture::Tooltip::for $itk_component(zoomin) "Zoom in"
263
264	itk_component add zoomout {
265	button $f.zout -borderwidth 1 -padx 1 -pady 1 \
266	-highlightthickness 0 \
267	-image [Rappture::icon zoom-out] \
268	-command [itcl::code $this Zoom out]
269	} {
270	usual
271	ignore -highlightthickness
272	}
273	pack $itk_component(zoomout) -side top -padx 2 -pady 2
274	Rappture::Tooltip::for $itk_component(zoomout) "Zoom out"
275
276	itk_component add volume {
277	Rappture::PushButton $f.volume \
278	-onimage [Rappture::icon volume-on] \
279	-offimage [Rappture::icon volume-off] \
280	-command [itcl::code $this AdjustSetting volume] \
281	-variable [itcl::scope _settings($this-volume)]
282	}
283	$itk_component(volume) select
284	Rappture::Tooltip::for $itk_component(volume) \
285	"Toggle the volume cloud on/off"
286	pack $itk_component(volume) -padx 2 -pady 2
287
288	if { [catch {
289	BuildViewTab
290	BuildVolumeTab
291	BuildCutplanesTab
292	BuildCameraTab
293	} errs] != 0 } {
294	global errorInfo
295	puts stderr "errs=$errs errorInfo=$errorInfo"
296	}
297
298	# Legend
299
300	set _image(legend) [image create photo]
301	itk_component add legend {
302	canvas $itk_component(plotarea).legend -height 50 -highlightthickness 0
303	} {
304	usual
305	ignore -highlightthickness
306	rename -background -plotbackground plotBackground Background
307	}
308	bind $itk_component(legend) <Configure> \
309	[itcl::code $this EventuallyResizeLegend]
310
311	# Hack around the Tk panewindow. The problem is that the requested
312	# size of the 3d view isn't set until an image is retrieved from
313	# the server. So the panewindow uses the tiny size.
314	set w 10000
315	pack forget $itk_component(3dview)
316	blt::table $itk_component(plotarea) \
317	0,0 $itk_component(3dview) -fill both -reqwidth $w \
318	1,0 $itk_component(legend) -fill x
319	blt::table configure $itk_component(plotarea) r1 -resize none
320
321	# Bindings for rotation via mouse
322	bind $itk_component(3dview) <ButtonPress-1> \
323	[itcl::code $this Rotate click %x %y]
324	bind $itk_component(3dview) <B1-Motion> \
325	[itcl::code $this Rotate drag %x %y]
326	bind $itk_component(3dview) <ButtonRelease-1> \
327	[itcl::code $this Rotate release %x %y]
328	bind $itk_component(3dview) <Configure> \
329	[itcl::code $this EventuallyResize %w %h]
330
331	# Bindings for panning via mouse
332	bind $itk_component(3dview) <ButtonPress-2> \
333	[itcl::code $this Pan click %x %y]
334	bind $itk_component(3dview) <B2-Motion> \
335	[itcl::code $this Pan drag %x %y]
336	bind $itk_component(3dview) <ButtonRelease-2> \
337	[itcl::code $this Pan release %x %y]
338
339	# Bindings for panning via keyboard
340	bind $itk_component(3dview) <KeyPress-Left> \
341	[itcl::code $this Pan set -10 0]
342	bind $itk_component(3dview) <KeyPress-Right> \
343	[itcl::code $this Pan set 10 0]
344	bind $itk_component(3dview) <KeyPress-Up> \
345	[itcl::code $this Pan set 0 -10]
346	bind $itk_component(3dview) <KeyPress-Down> \
347	[itcl::code $this Pan set 0 10]
348	bind $itk_component(3dview) <Shift-KeyPress-Left> \
349	[itcl::code $this Pan set -2 0]
350	bind $itk_component(3dview) <Shift-KeyPress-Right> \
351	[itcl::code $this Pan set 2 0]
352	bind $itk_component(3dview) <Shift-KeyPress-Up> \
353	[itcl::code $this Pan set 0 -2]
354	bind $itk_component(3dview) <Shift-KeyPress-Down> \
355	[itcl::code $this Pan set 0 2]
356
357	# Bindings for zoom via keyboard
358	bind $itk_component(3dview) <KeyPress-Prior> \
359	[itcl::code $this Zoom out]
360	bind $itk_component(3dview) <KeyPress-Next> \
361	[itcl::code $this Zoom in]
362
363	bind $itk_component(3dview) <Enter> "focus $itk_component(3dview)"
364
365	if {[string equal "x11" [tk windowingsystem]]} {
366	# Bindings for zoom via mouse
367	bind $itk_component(3dview) <4> [itcl::code $this Zoom out]
368	bind $itk_component(3dview) <5> [itcl::code $this Zoom in]
369	}
370
371	set _image(download) [image create photo]
372
373	eval itk_initialize $args
374
375	Connect
376	}
377
378	# ----------------------------------------------------------------------
379	# DESTRUCTOR
380	# ----------------------------------------------------------------------
381	itcl::body Rappture::NanovisViewer::destructor {} {
382	$_dispatcher cancel !rebuild
383	$_dispatcher cancel !send_transfunc
384	$_dispatcher cancel !resize
385	image delete $_image(plot)
386	image delete $_image(legend)
387	image delete $_image(download)
388	catch { blt::arcball destroy $_arcball }
389	array unset _settings $this-*
390	}
391
392	# ----------------------------------------------------------------------
393	# USAGE: add <dataobj> ?<settings>?
394	#
395	# Clients use this to add a data object to the plot. The optional
396	# <settings> are used to configure the plot. Allowed settings are
397	# -color, -brightness, -width, -linestyle, and -raise.
398	# ----------------------------------------------------------------------
399	itcl::body Rappture::NanovisViewer::add {dataobj {settings ""}} {
400	array set params {
401	-color auto
402	-width 1
403	-linestyle solid
404	-brightness 0
405	-raise 0
406	-description ""
407	-param ""
408	}
409	foreach {opt val} $settings {
410	if {![info exists params($opt)]} {
411	error "bad setting \"$opt\": should be [join [lsort [array names params]] {, }]"
412	}
413	set params($opt) $val
414	}
415	if {$params(-color) == "auto" \|\| $params(-color) == "autoreset"} {
416	# can't handle -autocolors yet
417	set params(-color) black
418	}
419	set pos [lsearch -exact $dataobj $_dlist]
420	if {$pos < 0} {
421	lappend _dlist $dataobj
422	set _allDataObjs($dataobj) 1
423	set _obj2ovride($dataobj-color) $params(-color)
424	set _obj2ovride($dataobj-width) $params(-width)
425	set _obj2ovride($dataobj-raise) $params(-raise)
426	$_dispatcher event -idle !rebuild
427	}
428	}
429
430	# ----------------------------------------------------------------------
431	# USAGE: get ?-objects?
432	# USAGE: get ?-image 3dview\|legend?
433	#
434	# Clients use this to query the list of objects being plotted, in
435	# order from bottom to top of this result. The optional "-image"
436	# flag can also request the internal images being shown.
437	# ----------------------------------------------------------------------
438	itcl::body Rappture::NanovisViewer::get {args} {
439	if {[llength $args] == 0} {
440	set args "-objects"
441	}
442
443	set op [lindex $args 0]
444	switch -- $op {
445	-objects {
446	# put the dataobj list in order according to -raise options
447	set dlist $_dlist
448	foreach obj $dlist {
449	if {[info exists _obj2ovride($obj-raise)] && $_obj2ovride($obj-raise)} {
450	set i [lsearch -exact $dlist $obj]
451	if {$i >= 0} {
452	set dlist [lreplace $dlist $i $i]
453	lappend dlist $obj
454	}
455	}
456	}
457	return $dlist
458	}
459	-image {
460	if {[llength $args] != 2} {
461	error "wrong # args: should be \"get -image 3dview\|legend\""
462	}
463	switch -- [lindex $args end] {
464	3dview {
465	return $_image(plot)
466	}
467	legend {
468	return $_image(legend)
469	}
470	default {
471	error "bad image name \"[lindex $args end]\": should be 3dview or legend"
472	}
473	}
474	}
475	default {
476	error "bad option \"$op\": should be -objects or -image"
477	}
478	}
479	}
480
481	# ----------------------------------------------------------------------
482	# USAGE: delete ?<dataobj1> <dataobj2> ...?
483	#
484	# Clients use this to delete a dataobj from the plot. If no dataobjs
485	# are specified, then all dataobjs are deleted. No data objects are
486	# deleted. They are only removed from the display list.
487	#
488	# ----------------------------------------------------------------------
489	itcl::body Rappture::NanovisViewer::delete {args} {
490	if {[llength $args] == 0} {
491	set args $_dlist
492	}
493	# Delete all specified dataobjs
494	set changed 0
495	foreach dataobj $args {
496	set pos [lsearch -exact $_dlist $dataobj]
497	if { $pos >= 0 } {
498	set _dlist [lreplace $_dlist $pos $pos]
499	array unset _limits $dataobj*
500	array unset _obj2ovride $dataobj-*
501	array unset _dataset2style $dataobj-*
502	set changed 1
503	}
504	}
505	# If anything changed, then rebuild the plot
506	if {$changed} {
507	$_dispatcher event -idle !rebuild
508	}
509	}
510
511	# ----------------------------------------------------------------------
512	# USAGE: scale ?<data1> <data2> ...?
513	#
514	# Sets the default limits for the overall plot according to the
515	# limits of the data for all of the given <data> objects. This
516	# accounts for all objects--even those not showing on the screen.
517	# Because of this, the limits are appropriate for all objects as
518	# the user scans through data in the ResultSet viewer.
519	# ----------------------------------------------------------------------
520	itcl::body Rappture::NanovisViewer::scale {args} {
521	foreach val {xmin xmax ymin ymax zmin zmax vmin vmax} {
522	set _limits($val) ""
523	}
524	foreach obj $args {
525	foreach axis {x y z v} {
526
527	foreach { min max } [$obj limits $axis] break
528
529	if {"" != $min && "" != $max} {
530	if {"" == $_limits(${axis}min)} {
531	set _limits(${axis}min) $min
532	set _limits(${axis}max) $max
533	} else {
534	if {$min < $_limits(${axis}min)} {
535	set _limits(${axis}min) $min
536	}
537	if {$max > $_limits(${axis}max)} {
538	set _limits(${axis}max) $max
539	}
540	}
541	}
542	}
543	}
544	}
545
546	# ----------------------------------------------------------------------
547	# USAGE: download coming
548	# USAGE: download controls <downloadCommand>
549	# USAGE: download now
550	#
551	# Clients use this method to create a downloadable representation
552	# of the plot. Returns a list of the form {ext string}, where
553	# "ext" is the file extension (indicating the type of data) and
554	# "string" is the data itself.
555	# ----------------------------------------------------------------------
556	itcl::body Rappture::NanovisViewer::download {option args} {
557	switch $option {
558	coming {
559	if {[catch {
560	blt::winop snap $itk_component(plotarea) $_image(download)
561	}]} {
562	$_image(download) configure -width 1 -height 1
563	$_image(download) put #000000
564	}
565	}
566	controls {
567	# no controls for this download yet
568	return ""
569	}
570	now {
571	# Get the image data (as base64) and decode it back to binary.
572	# This is better than writing to temporary files. When we switch
573	# to the BLT picture image it won't be necessary to decode the
574	# image data.
575	if { [image width $_image(plot)] > 0 &&
576	[image height $_image(plot)] > 0 } {
577	set bytes [$_image(plot) data -format "jpeg -quality 100"]
578	set bytes [Rappture::encoding::decode -as b64 $bytes]
579	return [list .jpg $bytes]
580	}
581	return ""
582	}
583	default {
584	error "bad option \"$option\": should be coming, controls, now"
585	}
586	}
587	}
588
589	# ----------------------------------------------------------------------
590	# USAGE: Connect ?<host:port>,<host:port>...?
591	#
592	# Clients use this method to establish a connection to a new
593	# server, or to reestablish a connection to the previous server.
594	# Any existing connection is automatically closed.
595	# ----------------------------------------------------------------------
596	itcl::body Rappture::NanovisViewer::Connect {} {
597	set _hosts [GetServerList "nanovis"]
598	if { "" == $_hosts } {
599	return 0
600	}
601	set _reset 1
602	set result [VisViewer::Connect $_hosts]
603	if { $result } {
604	set w [winfo width $itk_component(3dview)]
605	set h [winfo height $itk_component(3dview)]
606	EventuallyResize $w $h
607	}
608	return $result
609	}
610
611	#
612	# isconnected --
613	#
614	# Indicates if we are currently connected to the visualization server.
615	#
616	itcl::body Rappture::NanovisViewer::isconnected {} {
617	return [VisViewer::IsConnected]
618	}
619
620	#
621	# disconnect --
622	#
623	itcl::body Rappture::NanovisViewer::disconnect {} {
624	Disconnect
625	}
626
627	#
628	# Disconnect --
629	#
630	# Clients use this method to disconnect from the current rendering
631	# server.
632	#
633	itcl::body Rappture::NanovisViewer::Disconnect {} {
634	VisViewer::Disconnect
635
636	# disconnected -- no more data sitting on server
637	array unset _serverDatasets
638	}
639
640	# ----------------------------------------------------------------------
641	# USAGE: SendTransferFuncs
642	# ----------------------------------------------------------------------
643	itcl::body Rappture::NanovisViewer::SendTransferFuncs {} {
644	if { $_first == "" } {
645	puts stderr "first not set"
646	return
647	}
648	# Ensure that the global opacity and thickness settings (in the slider
649	# settings widgets) are used for the active transfer-function. Update
650	# the values in the _settings varible.
651	set opacity [expr { double($_settings($this-opacity)) * 0.01 }]
652	# Scale values between 0.00001 and 0.01000
653	set thickness [expr {double($_settings($this-thickness)) * 0.0001}]
654
655	foreach tag [CurrentDatasets] {
656	if { ![info exists _serverDatasets($tag)] \|\| !$_serverDatasets($tag) } {
657	# The volume hasn't reached the server yet. How did we get
658	# here?
659	puts stderr "Don't have $tag in _serverDatasets"
660	continue
661	}
662	if { ![info exists _dataset2style($tag)] } {
663	puts stderr "Don't have style for volume $tag"
664	continue; # How does this happen?
665	}
666	set tf $_dataset2style($tag)
667	set _settings($this-$tf-opacity) $opacity
668	set _settings($this-$tf-thickness) $thickness
669	ComputeTransferFunc $tf
670	# FIXME: Need to the send information as to what transfer functions
671	# to update so that we only update the transfer function
672	# as necessary. Right now, all transfer functions are
673	# updated. This makes moving the isomarker slider chunky.
674	if { ![info exists _activeTfs($tf)] \|\| !$_activeTfs($tf) } {
675	set _activeTfs($tf) 1
676	}
677	SendCmd "volume shading transfunc $tf $tag"
678	}
679	FixLegend
680	}
681
682	# ----------------------------------------------------------------------
683	# USAGE: ReceiveImage -bytes <size> -type <type> -token <token>
684	#
685	# Invoked automatically whenever the "image" command comes in from
686	# the rendering server. Indicates that binary image data with the
687	# specified <size> will follow.
688	# ----------------------------------------------------------------------
689	itcl::body Rappture::NanovisViewer::ReceiveImage { args } {
690	array set info {
691	-token "???"
692	-bytes 0
693	-type image
694	}
695	array set info $args
696	set bytes [ReceiveBytes $info(-bytes)]
697	ReceiveEcho <<line "<read $info(-bytes) bytes"
698	if { $info(-type) == "image" } {
699	ReceiveEcho "for [image width $_image(plot)]x[image height $_image(plot)] image>"
700	$_image(plot) configure -data $bytes
701	} elseif { $info(type) == "print" } {
702	set tag $this-print-$info(-token)
703	set _hardcopy($tag) $bytes
704	}
705	}
706
707	#
708	# ReceiveLegend --
709	#
710	# The procedure is the response from the render server to each "legend"
711	# command. The server sends back a "legend" command invoked our
712	# the slave interpreter. The purpose is to collect data of the image
713	# representing the legend in the canvas. In addition, the isomarkers
714	# of the active transfer function are displayed.
715	#
716	# I don't know is this is the right place to display the isomarkers.
717	# I don't know all the different paths used to draw the plot. There's
718	# "Rebuild", "add", etc.
719	#
720	itcl::body Rappture::NanovisViewer::ReceiveLegend { tf vmin vmax size } {
721	if { ![isconnected] } {
722	return
723	}
724	set bytes [ReceiveBytes $size]
725	$_image(legend) configure -data $bytes
726	ReceiveEcho <<line "<read $size bytes for [image width $_image(legend)]x[image height $_image(legend)] legend>"
727
728	set c $itk_component(legend)
729	set w [winfo width $c]
730	set h [winfo height $c]
731	set lx 10
732	set ly [expr {$h - 1}]
733	if {"" == [$c find withtag transfunc]} {
734	$c create image 10 10 -anchor nw \
735	-image $_image(legend) -tags transfunc
736	$c create text $lx $ly -anchor sw \
737	-fill $itk_option(-plotforeground) -tags "limits vmin"
738	$c create text [expr {$w-$lx}] $ly -anchor se \
739	-fill $itk_option(-plotforeground) -tags "limits vmax"
740	$c lower transfunc
741	$c bind transfunc <ButtonRelease-1> \
742	[itcl::code $this AddIsoMarker %x %y]
743	}
744	# Display the markers used by the active transfer function.
745
746	array set limits [limits $tf]
747	$c itemconfigure vmin -text [format %.2g $limits(min)]
748	$c coords vmin $lx $ly
749
750	$c itemconfigure vmax -text [format %.2g $limits(max)]
751	$c coords vmax [expr {$w-$lx}] $ly
752
753	if { [info exists _isomarkers($tf)] } {
754	foreach m $_isomarkers($tf) {
755	$m visible yes
756	}
757	}
758
759	# The colormap may have changed. Resync the slicers with the colormap.
760	set datasets [CurrentDatasets -cutplanes]
761	SendCmd "volume data state $_settings($this-volume) $datasets"
762
763	# Adjust the cutplane for only the first component in the topmost volume
764	# (i.e. the first volume designated in the field).
765	set tag [lindex $datasets 0]
766	foreach axis {x y z} {
767	# Turn off cutplanes for all volumes
768	SendCmd "cutplane state 0 $axis"
769	if { $_settings($this-${axis}cutplane) } {
770	# Turn on cutplane for this particular volume and set the position
771	SendCmd "cutplane state 1 $axis $tag"
772	set pos [expr {0.01*$_settings($this-${axis}cutposition)}]
773	SendCmd "cutplane position $pos $axis $tag"
774	}
775	}
776	}
777
778	#
779	# ReceiveData --
780	#
781	# The procedure is the response from the render server to each "data
782	# follows" command. The server sends back a "data" command invoked our
783	# the slave interpreter. The purpose is to collect the min/max of the
784	# volume sent to the render server. Since the client (nanovisviewer)
785	# doesn't parse 3D data formats, we rely on the server (nanovis) to
786	# tell us what the limits are. Once we've received the limits to all
787	# the data we've sent (tracked by _recvdDatasets) we can then determine
788	# what the transfer functions are for these volumes.
789	#
790	#
791	# Note: There is a considerable tradeoff in having the server report
792	# back what the data limits are. It means that much of the code
793	# having to do with transfer-functions has to wait for the data
794	# to come back, since the isomarkers are calculated based upon
795	# the data limits. The client code is much messier because of
796	# this. The alternative is to parse any of the 3D formats on the
797	# client side.
798	#
799	itcl::body Rappture::NanovisViewer::ReceiveData { args } {
800	if { ![isconnected] } {
801	return
802	}
803
804	# Arguments from server are name value pairs. Stuff them in an array.
805	array set info $args
806
807	set tag $info(tag)
808	set parts [split $tag -]
809
810	#
811	# Volumes don't exist until we're told about them.
812	#
813	set dataobj [lindex $parts 0]
814	set _serverDatasets($tag) 1
815	if { $_settings($this-volume) && $dataobj == $_first } {
816	SendCmd "volume state 1 $tag"
817	}
818	set _limits($tag-min) $info(min); # Minimum value of the volume.
819	set _limits($tag-max) $info(max); # Maximum value of the volume.
820	set _limits(vmin) $info(vmin); # Overall minimum value.
821	set _limits(vmax) $info(vmax); # Overall maximum value.
822
823	unset _recvdDatasets($tag)
824	if { [array size _recvdDatasets] == 0 } {
825	# The active transfer function is by default the first component of
826	# the first data object. This assumes that the data is always
827	# successfully transferred.
828	updatetransferfuncs
829	}
830	}
831
832	# ----------------------------------------------------------------------
833	# USAGE: Rebuild
834	#
835	# Called automatically whenever something changes that affects the
836	# data in the widget. Clears any existing data and rebuilds the
837	# widget to display new data.
838	# ----------------------------------------------------------------------
839	itcl::body Rappture::NanovisViewer::Rebuild {} {
840	set w [winfo width $itk_component(3dview)]
841	set h [winfo height $itk_component(3dview)]
842	if { $w < 2 \|\| $h < 2 } {
843	$_dispatcher event -idle !rebuild
844	return
845	}
846
847	# Turn on buffering of commands to the server. We don't want to
848	# be preempted by a server disconnect/reconnect (which automatically
849	# generates a new call to Rebuild).
850	StartBufferingCommands
851
852	# Hide all the isomarkers. Can't remove them. Have to remember the
853	# settings since the user may have created/deleted/moved markers.
854
855	foreach tf [array names _isomarkers] {
856	foreach m $_isomarkers($tf) {
857	$m visible no
858	}
859	}
860
861	if { $_width != $w \|\| $_height != $h \|\| $_reset } {
862	set _width $w
863	set _height $h
864	$_arcball resize $w $h
865	DoResize
866	}
867	if { $_reset } {
868	if { $_reportClientInfo } {
869	# Tell the server the name of the tool, the version, and
870	# dataset that we are rendering. Have to do it here because
871	# we don't know what data objects are using the renderer until
872	# be get here.
873	global env
874
875	set info {}
876	set user "???"
877	if { [info exists env(USER)] } {
878	set user $env(USER)
879	}
880	set session "???"
881	if { [info exists env(SESSION)] } {
882	set session $env(SESSION)
883	}
884	lappend info "hub" [exec hostname]
885	lappend info "client" "nanovisviewer"
886	lappend info "user" $user
887	lappend info "session" $session
888	SendCmd "clientinfo [list $info]"
889	}
890	}
891	foreach dataobj [get] {
892	foreach cname [$dataobj components] {
893	set tag $dataobj-$cname
894	if { ![info exists _serverDatasets($tag)] } {
895	# Send the data as one huge base64-encoded mess -- yuck!
896	set data [$dataobj values $cname]
897	set nbytes [string length $data]
898	if { $_reportClientInfo } {
899	set info {}
900	lappend info "tool_id" [$dataobj hints toolId]
901	lappend info "tool_name" [$dataobj hints toolName]
902	lappend info "tool_version" [$dataobj hints toolRevision]
903	lappend info "tool_title" [$dataobj hints toolTitle]
904	lappend info "dataset_label" [$dataobj hints label]
905	lappend info "dataset_size" $nbytes
906	lappend info "dataset_tag" $tag
907	SendCmd "clientinfo [list $info]"
908	}
909	SendCmd "volume data follows $nbytes $tag"
910	append _outbuf $data
911	set _recvdDatasets($tag) 1
912	set _serverDatasets($tag) 0
913	}
914	NameTransferFunc $dataobj $cname
915	}
916	}
917	set _first [lindex [get] 0]
918	if { $_reset } {
919	#
920	# Reset the camera and other view parameters
921	#
922	set _settings($this-qw) $_view(qw)
923	set _settings($this-qx) $_view(qx)
924	set _settings($this-qy) $_view(qy)
925	set _settings($this-qz) $_view(qz)
926	set _settings($this-pan-x) $_view(pan-x)
927	set _settings($this-pan-y) $_view(pan-y)
928	set _settings($this-zoom) $_view(zoom)
929
930	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
931	$_arcball quaternion $q
932	SendCmd "camera orient $q"
933	SendCmd "camera reset"
934	PanCamera
935	SendCmd "camera zoom $_view(zoom)"
936	InitSettings light2side light transp isosurface grid axes
937
938	foreach axis {x y z} {
939	# Turn off cutplanes for all volumes
940	SendCmd "cutplane state 0 $axis"
941	}
942	if {"" != $_first} {
943	set axis [$_first hints updir]
944	if { "" != $axis } {
945	SendCmd "up $axis"
946	}
947	set location [$_first hints camera]
948	if { $location != "" } {
949	array set _view $location
950	}
951	}
952	}
953	# Outline seems to need to be reset every update.
954	InitSettings outline
955	# nothing to send -- activate the proper ivol
956	SendCmd "volume state 0"
957	if {"" != $_first} {
958	set datasets [array names _serverDatasets $_first-*]
959	if { $datasets != "" } {
960	SendCmd "volume state 1 $datasets"
961	}
962	# If the first volume already exists on the server, then make sure
963	# we display the proper transfer function in the legend.
964	set cname [lindex [$_first components] 0]
965	if { [info exists _serverDatasets($_first-$cname)] } {
966	updatetransferfuncs
967	}
968	}
969	# Actually write the commands to the server socket. If it fails, we don't
970	# care. We're finished here.
971	blt::busy hold $itk_component(hull)
972	StopBufferingCommands
973	blt::busy release $itk_component(hull)
974	set _reset 0
975	}
976
977	# ----------------------------------------------------------------------
978	# USAGE: CurrentDatasets ?-cutplanes?
979	#
980	# Returns a list of volume server IDs for the current volume being
981	# displayed. This is normally a single ID, but it might be a list
982	# of IDs if the current data object has multiple components.
983	# ----------------------------------------------------------------------
984	itcl::body Rappture::NanovisViewer::CurrentDatasets {{what -all}} {
985	set rlist ""
986	if { $_first == "" } {
987	return
988	}
989	foreach cname [$_first components] {
990	set tag $_first-$cname
991	if { [info exists _serverDatasets($tag)] && $_serverDatasets($tag) } {
992	array set style {
993	-cutplanes 1
994	}
995	array set style [lindex [$_first components -style $cname] 0]
996	if { $what != "-cutplanes" \|\| $style(-cutplanes) } {
997	lappend rlist $tag
998	}
999	}
1000	}
1001	return $rlist
1002	}
1003
1004	# ----------------------------------------------------------------------
1005	# USAGE: Zoom in
1006	# USAGE: Zoom out
1007	# USAGE: Zoom reset
1008	#
1009	# Called automatically when the user clicks on one of the zoom
1010	# controls for this widget. Changes the zoom for the current view.
1011	# ----------------------------------------------------------------------
1012	itcl::body Rappture::NanovisViewer::Zoom {option} {
1013	switch -- $option {
1014	"in" {
1015	set _view(zoom) [expr {$_view(zoom)*1.25}]
1016	set _settings($this-zoom) $_view(zoom)
1017	SendCmd "camera zoom $_view(zoom)"
1018	}
1019	"out" {
1020	set _view(zoom) [expr {$_view(zoom)*0.8}]
1021	set _settings($this-zoom) $_view(zoom)
1022	SendCmd "camera zoom $_view(zoom)"
1023	}
1024	"reset" {
1025	array set _view {
1026	qw 0.853553
1027	qx -0.353553
1028	qy 0.353553
1029	qz 0.146447
1030	zoom 1.0
1031	pan-x 0
1032	pan-y 0
1033	}
1034	if { $_first != "" } {
1035	set location [$_first hints camera]
1036	if { $location != "" } {
1037	array set _view $location
1038	}
1039	}
1040	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
1041	$_arcball quaternion $q
1042	SendCmd "camera orient $q"
1043	SendCmd "camera reset"
1044	set _settings($this-qw) $_view(qw)
1045	set _settings($this-qx) $_view(qx)
1046	set _settings($this-qy) $_view(qy)
1047	set _settings($this-qz) $_view(qz)
1048	set _settings($this-pan-x) $_view(pan-x)
1049	set _settings($this-pan-y) $_view(pan-y)
1050	set _settings($this-zoom) $_view(zoom)
1051	$itk_component(orientation) value "default"
1052	}
1053	}
1054	}
1055
1056	itcl::body Rappture::NanovisViewer::PanCamera {} {
1057	#set x [expr ($_view(pan-x)) / $_limits(xrange)]
1058	#set y [expr ($_view(pan-y)) / $_limits(yrange)]
1059	set x $_view(pan-x)
1060	set y $_view(pan-y)
1061	SendCmd "camera pan $x $y"
1062	}
1063
1064
1065	# ----------------------------------------------------------------------
1066	# USAGE: Rotate click <x> <y>
1067	# USAGE: Rotate drag <x> <y>
1068	# USAGE: Rotate release <x> <y>
1069	#
1070	# Called automatically when the user clicks/drags/releases in the
1071	# plot area. Moves the plot according to the user's actions.
1072	# ----------------------------------------------------------------------
1073	itcl::body Rappture::NanovisViewer::Rotate {option x y} {
1074	switch -- $option {
1075	click {
1076	$itk_component(3dview) configure -cursor fleur
1077	set _click(x) $x
1078	set _click(y) $y
1079	}
1080	drag {
1081	if {[array size _click] == 0} {
1082	Rotate click $x $y
1083	} else {
1084	set w [winfo width $itk_component(3dview)]
1085	set h [winfo height $itk_component(3dview)]
1086	if {$w <= 0 \|\| $h <= 0} {
1087	return
1088	}
1089
1090	if {[catch {
1091	# this fails sometimes for no apparent reason
1092	set dx [expr {double($x-$_click(x))/$w}]
1093	set dy [expr {double($y-$_click(y))/$h}]
1094	}]} {
1095	return
1096	}
1097
1098	set q [$_arcball rotate $x $y $_click(x) $_click(y)]
1099	foreach { _view(qw) _view(qx) _view(qy) _view(qz) } $q break
1100	set _settings($this-qw) $_view(qw)
1101	set _settings($this-qx) $_view(qx)
1102	set _settings($this-qy) $_view(qy)
1103	set _settings($this-qz) $_view(qz)
1104	SendCmd "camera orient $q"
1105
1106	set _click(x) $x
1107	set _click(y) $y
1108	}
1109	}
1110	release {
1111	Rotate drag $x $y
1112	$itk_component(3dview) configure -cursor ""
1113	catch {unset _click}
1114	}
1115	default {
1116	error "bad option \"$option\": should be click, drag, release"
1117	}
1118	}
1119	}
1120
1121	# ----------------------------------------------------------------------
1122	# USAGE: $this Pan click x y
1123	# $this Pan drag x y
1124	# $this Pan release x y
1125	#
1126	# Called automatically when the user clicks on one of the zoom
1127	# controls for this widget. Changes the zoom for the current view.
1128	# ----------------------------------------------------------------------
1129	itcl::body Rappture::NanovisViewer::Pan {option x y} {
1130	# Experimental stuff
1131	set w [winfo width $itk_component(3dview)]
1132	set h [winfo height $itk_component(3dview)]
1133	if { $option == "set" } {
1134	set x [expr $x / double($w)]
1135	set y [expr $y / double($h)]
1136	set _view(pan-x) [expr $_view(pan-x) + $x]
1137	set _view(pan-y) [expr $_view(pan-y) + $y]
1138	PanCamera
1139	set _settings($this-pan-x) $_view(pan-x)
1140	set _settings($this-pan-y) $_view(pan-y)
1141	return
1142	}
1143	if { $option == "click" } {
1144	set _click(x) $x
1145	set _click(y) $y
1146	$itk_component(3dview) configure -cursor hand1
1147	}
1148	if { $option == "drag" \|\| $option == "release" } {
1149	set dx [expr ($_click(x) - $x)/double($w)]
1150	set dy [expr ($_click(y) - $y)/double($h)]
1151	set _click(x) $x
1152	set _click(y) $y
1153	set _view(pan-x) [expr $_view(pan-x) - $dx]
1154	set _view(pan-y) [expr $_view(pan-y) - $dy]
1155	PanCamera
1156	set _settings($this-pan-x) $_view(pan-x)
1157	set _settings($this-pan-y) $_view(pan-y)
1158	}
1159	if { $option == "release" } {
1160	$itk_component(3dview) configure -cursor ""
1161	}
1162	}
1163
1164	# ----------------------------------------------------------------------
1165	# USAGE: InitSettings <what> ?<value>?
1166	#
1167	# Used internally to update rendering settings whenever parameters
1168	# change in the popup settings panel. Sends the new settings off
1169	# to the back end.
1170	# ----------------------------------------------------------------------
1171	itcl::body Rappture::NanovisViewer::InitSettings { args } {
1172	foreach arg $args {
1173	AdjustSetting $arg
1174	}
1175	}
1176
1177	# ----------------------------------------------------------------------
1178	# USAGE: AdjustSetting <what> ?<value>?
1179	#
1180	# Used internally to update rendering settings whenever parameters
1181	# change in the popup settings panel. Sends the new settings off
1182	# to the back end.
1183	# ----------------------------------------------------------------------
1184	itcl::body Rappture::NanovisViewer::AdjustSetting {what {value ""}} {
1185	if {![isconnected]} {
1186	return
1187	}
1188	switch -- $what {
1189	light {
1190	set val $_settings($this-light)
1191	set diffuse [expr {0.01*$val}]
1192	set ambient [expr {1.0-$diffuse}]
1193	set specularLevel 0.3
1194	set specularExp 90.0
1195	SendCmd "volume shading ambient $ambient"
1196	SendCmd "volume shading diffuse $diffuse"
1197	SendCmd "volume shading specularLevel $specularLevel"
1198	SendCmd "volume shading specularExp $specularExp"
1199	}
1200	light2side {
1201	set val $_settings($this-light2side)
1202	SendCmd "volume shading light2side $val"
1203	}
1204	transp {
1205	set val $_settings($this-transp)
1206	set sval [expr { 0.01 * double($val) }]
1207	SendCmd "volume shading opacity $sval"
1208	}
1209	opacity {
1210	set val $_settings($this-opacity)
1211	set sval [expr { 0.01 * double($val) }]
1212	foreach tf [array names _activeTfs] {
1213	set _settings($this-$tf-opacity) $sval
1214	set _activeTfs($tf) 0
1215	}
1216	updatetransferfuncs
1217	}
1218	thickness {
1219	if { [array names _activeTfs] > 0 } {
1220	set val $_settings($this-thickness)
1221	# Scale values between 0.00001 and 0.01000
1222	set sval [expr {0.0001*double($val)}]
1223	foreach tf [array names _activeTfs] {
1224	set _settings($this-$tf-thickness) $sval
1225	set _activeTfs($tf) 0
1226	}
1227	updatetransferfuncs
1228	}
1229	}
1230	"outline" {
1231	SendCmd "volume outline state $_settings($this-outline)"
1232	}
1233	"isosurface" {
1234	SendCmd "volume shading isosurface $_settings($this-isosurface)"
1235	}
1236	"colormap" {
1237	set color [$itk_component(colormap) value]
1238	set _settings(colormap) $color
1239	# Only set the colormap on the first volume. Ignore the others.
1240	#ResetColormap $color
1241	}
1242	"grid" {
1243	SendCmd "grid visible $_settings($this-grid)"
1244	}
1245	"axes" {
1246	SendCmd "axis visible $_settings($this-axes)"
1247	}
1248	"legend" {
1249	if { $_settings($this-legend) } {
1250	blt::table $itk_component(plotarea) \
1251	0,0 $itk_component(3dview) -fill both \
1252	1,0 $itk_component(legend) -fill x
1253	blt::table configure $itk_component(plotarea) r1 -resize none
1254	} else {
1255	blt::table forget $itk_component(legend)
1256	}
1257	}
1258	"volume" {
1259	set datasets [CurrentDatasets -cutplanes]
1260	SendCmd "volume data state $_settings($this-volume) $datasets"
1261	}
1262	"xcutplane" - "ycutplane" - "zcutplane" {
1263	set axis [string range $what 0 0]
1264	set bool $_settings($this-$what)
1265	set datasets [CurrentDatasets -cutplanes]
1266	set tag [lindex $datasets 0]
1267	SendCmd "cutplane state $bool $axis $tag"
1268	if { $bool } {
1269	$itk_component(${axis}CutScale) configure -state normal \
1270	-troughcolor white
1271	} else {
1272	$itk_component(${axis}CutScale) configure -state disabled \
1273	-troughcolor grey82
1274	}
1275	}
1276	default {
1277	error "don't know how to fix $what"
1278	}
1279	}
1280	}
1281
1282	# ----------------------------------------------------------------------
1283	# USAGE: FixLegend
1284	#
1285	# Used internally to update the legend area whenever it changes size
1286	# or when the field changes. Asks the server to send a new legend
1287	# for the current field.
1288	# ----------------------------------------------------------------------
1289	itcl::body Rappture::NanovisViewer::FixLegend {} {
1290	set _resizeLegendPending 0
1291	set lineht [font metrics $itk_option(-font) -linespace]
1292	set w [expr {$_width-20}]
1293	set h [expr {[winfo height $itk_component(legend)]-20-$lineht}]
1294	if {$w > 0 && $h > 0 && [array names _activeTfs] > 0 && $_first != "" } {
1295	set tag [lindex [CurrentDatasets] 0]
1296	if { [info exists _dataset2style($tag)] } {
1297	SendCmd "legend $_dataset2style($tag) $w $h"
1298	}
1299	} else {
1300	# Can't do this as this will remove the items associated with the
1301	# isomarkers.
1302
1303	#$itk_component(legend) delete all
1304	}
1305	}
1306
1307	#
1308	# NameTransferFunc --
1309	#
1310	# Creates a transfer function name based on the <style> settings in the
1311	# library run.xml file. This placeholder will be used later to create
1312	# and send the actual transfer function once the data info has been sent
1313	# to us by the render server. [We won't know the volume limits until the
1314	# server parses the 3D data and sends back the limits via ReceiveData.]
1315	#
1316	# FIXME: The current way we generate transfer-function names completely
1317	# ignores the -markers option. The problem is that we are forced
1318	# to compute the name from an increasing complex set of values:
1319	# color, levels, marker, opacity. I think we're stuck doing it
1320	# now.
1321	#
1322	itcl::body Rappture::NanovisViewer::NameTransferFunc { dataobj cname } {
1323	array set style {
1324	-color BCGYR
1325	-levels 6
1326	-opacity 1.0
1327	-markers ""
1328	}
1329	set tag $dataobj-$cname
1330	array set style [lindex [$dataobj components -style $cname] 0]
1331	set tf "$style(-color):$style(-levels):$style(-opacity)"
1332	set _dataset2style($tag) $tf
1333	lappend _style2datasets($tf) $tag
1334	return $tf
1335	}
1336
1337
1338
1339	#
1340	# ComputeTransferFunc --
1341	#
1342	# Computes and sends the transfer function to the render server. It's
1343	# assumed that the volume data limits are known and that the global
1344	# transfer-functions slider values have be setup. Both parts are
1345	# needed to compute the relative value (location) of the marker, and
1346	# the alpha map of the transfer function.
1347	#
1348	itcl::body Rappture::NanovisViewer::ComputeTransferFunc { tf } {
1349	array set style {
1350	-color BCGYR
1351	-levels 6
1352	-opacity 1.0
1353	-markers ""
1354	}
1355	foreach {dataobj cname} [split [lindex $_style2datasets($tf) 0] -] break
1356	array set style [lindex [$dataobj components -style $cname] 0]
1357
1358	# We have to parse the style attributes for a volume using this
1359	# transfer-function once. This sets up the initial isomarkers for the
1360	# transfer function. The user may add/delete markers, so we have to
1361	# maintain a list of markers for each transfer-function. We use the one
1362	# of the volumes (the first in the list) using the transfer-function as a
1363	# reference.
1364	#
1365	# FIXME: The current way we generate transfer-function names completely
1366	# ignores the -markers option. The problem is that we are forced
1367	# to compute the name from an increasing complex set of values:
1368	# color, levels, marker, opacity. I think the cow's out of the
1369	# barn on this one.
1370
1371	if { ![info exists _isomarkers($tf)] } {
1372	# Have to defer creation of isomarkers until we have data limits
1373	if { [info exists style(-markers)] &&
1374	[llength $style(-markers)] > 0 } {
1375	ParseMarkersOption $tf $style(-markers)
1376	} else {
1377	ParseLevelsOption $tf $style(-levels)
1378	}
1379	}
1380	set cmap [ColorsToColormap $style(-color)]
1381	set tag $this-$tf
1382	if { ![info exists _settings($tag-opacity)] } {
1383	set _settings($tag-opacity) $style(-opacity)
1384	}
1385	set max 1.0 ;#$_settings($tag-opacity)
1386
1387	set isovalues {}
1388	foreach m $_isomarkers($tf) {
1389	lappend isovalues [$m relval]
1390	}
1391	# Sort the isovalues
1392	set isovalues [lsort -real $isovalues]
1393
1394	if { ![info exists _settings($tag-thickness)]} {
1395	set _settings($tag-thickness) 0.005
1396	}
1397	set delta $_settings($tag-thickness)
1398
1399	set first [lindex $isovalues 0]
1400	set last [lindex $isovalues end]
1401	set wmap ""
1402	if { $first == "" \|\| $first != 0.0 } {
1403	lappend wmap 0.0 0.0
1404	}
1405	foreach x $isovalues {
1406	set x1 [expr {$x-$delta-0.00001}]
1407	set x2 [expr {$x-$delta}]
1408	set x3 [expr {$x+$delta}]
1409	set x4 [expr {$x+$delta+0.00001}]
1410	if { $x1 < 0.0 } {
1411	set x1 0.0
1412	} elseif { $x1 > 1.0 } {
1413	set x1 1.0
1414	}
1415	if { $x2 < 0.0 } {
1416	set x2 0.0
1417	} elseif { $x2 > 1.0 } {
1418	set x2 1.0
1419	}
1420	if { $x3 < 0.0 } {
1421	set x3 0.0
1422	} elseif { $x3 > 1.0 } {
1423	set x3 1.0
1424	}
1425	if { $x4 < 0.0 } {
1426	set x4 0.0
1427	} elseif { $x4 > 1.0 } {
1428	set x4 1.0
1429	}
1430	# add spikes in the middle
1431	lappend wmap $x1 0.0
1432	lappend wmap $x2 $max
1433	lappend wmap $x3 $max
1434	lappend wmap $x4 0.0
1435	}
1436	if { $last == "" \|\| $last != 1.0 } {
1437	lappend wmap 1.0 0.0
1438	}
1439	SendCmd "transfunc define $tf { $cmap } { $wmap }"
1440	}
1441
1442	# ----------------------------------------------------------------------
1443	# CONFIGURATION OPTION: -plotbackground
1444	# ----------------------------------------------------------------------
1445	itcl::configbody Rappture::NanovisViewer::plotbackground {
1446	if { [isconnected] } {
1447	foreach {r g b} [Color2RGB $itk_option(-plotbackground)] break
1448	#fix this!
1449	#SendCmd "color background $r $g $b"
1450	}
1451	}
1452
1453	# ----------------------------------------------------------------------
1454	# CONFIGURATION OPTION: -plotforeground
1455	# ----------------------------------------------------------------------
1456	itcl::configbody Rappture::NanovisViewer::plotforeground {
1457	if { [isconnected] } {
1458	foreach {r g b} [Color2RGB $itk_option(-plotforeground)] break
1459	#fix this!
1460	#SendCmd "color background $r $g $b"
1461	}
1462	}
1463
1464	# ----------------------------------------------------------------------
1465	# CONFIGURATION OPTION: -plotoutline
1466	# ----------------------------------------------------------------------
1467	itcl::configbody Rappture::NanovisViewer::plotoutline {
1468	# Must check if we are connected because this routine is called from the
1469	# class body when the -plotoutline itk_option is defined. At that point
1470	# the NanovisViewer class constructor hasn't been called, so we can't
1471	# start sending commands to visualization server.
1472	if { [isconnected] } {
1473	if {"" == $itk_option(-plotoutline)} {
1474	SendCmd "volume outline state off"
1475	} else {
1476	SendCmd "volume outline state on"
1477	SendCmd "volume outline color [Color2RGB $itk_option(-plotoutline)]"
1478	}
1479	}
1480	}
1481
1482	#
1483	# The -levels option takes a single value that represents the number
1484	# of evenly distributed markers based on the current data range. Each
1485	# marker is a relative value from 0.0 to 1.0.
1486	#
1487	itcl::body Rappture::NanovisViewer::ParseLevelsOption { tf levels } {
1488	set c $itk_component(legend)
1489	regsub -all "," $levels " " levels
1490	if {[string is int $levels]} {
1491	for {set i 1} { $i <= $levels } {incr i} {
1492	set x [expr {double($i)/($levels+1)}]
1493	set m [Rappture::IsoMarker \#auto $c $this $tf]
1494	$m relval $x
1495	lappend _isomarkers($tf) $m
1496	}
1497	} else {
1498	foreach x $levels {
1499	set m [Rappture::IsoMarker \#auto $c $this $tf]
1500	$m relval $x
1501	lappend _isomarkers($tf) $m
1502	}
1503	}
1504	}
1505
1506	#
1507	# The -markers option takes a list of zero or more values (the values
1508	# may be separated either by spaces or commas) that have the following
1509	# format:
1510	#
1511	# N% Percent of current total data range. Converted to
1512	# to a relative value between 0.0 and 1.0.
1513	# N Absolute value of marker. If the marker is outside of
1514	# the current range, it will be displayed on the outer
1515	# edge of the legends, but it range it represents will
1516	# not be seen.
1517	#
1518	itcl::body Rappture::NanovisViewer::ParseMarkersOption { tf markers } {
1519	set c $itk_component(legend)
1520	regsub -all "," $markers " " markers
1521	foreach marker $markers {
1522	set n [scan $marker "%g%s" value suffix]
1523	if { $n == 2 && $suffix == "%" } {
1524	# ${n}% : Set relative value.
1525	set value [expr {$value * 0.01}]
1526	set m [Rappture::IsoMarker \#auto $c $this $tf]
1527	$m relval $value
1528	lappend _isomarkers($tf) $m
1529	} else {
1530	# ${n} : Set absolute value.
1531	set m [Rappture::IsoMarker \#auto $c $this $tf]
1532	$m absval $value
1533	lappend _isomarkers($tf) $m
1534	}
1535	}
1536	}
1537
1538	# ----------------------------------------------------------------------
1539	# USAGE: UndateTransferFuncs
1540	# ----------------------------------------------------------------------
1541	itcl::body Rappture::NanovisViewer::updatetransferfuncs {} {
1542	$_dispatcher event -idle !send_transfunc
1543	}
1544
1545	itcl::body Rappture::NanovisViewer::AddIsoMarker { x y } {
1546	if { $_first == "" } {
1547	error "active transfer function isn't set"
1548	}
1549	set tag [lindex [CurrentDatasets] 0]
1550	set tf $_dataset2style($tag)
1551	set c $itk_component(legend)
1552	set m [Rappture::IsoMarker \#auto $c $this $tf]
1553	set w [winfo width $c]
1554	$m relval [expr {double($x-10)/($w-20)}]
1555	lappend _isomarkers($tf) $m
1556	updatetransferfuncs
1557	return 1
1558	}
1559
1560	itcl::body Rappture::NanovisViewer::rmdupmarker { marker x } {
1561	set tf [$marker transferfunc]
1562	set bool 0
1563	if { [info exists _isomarkers($tf)] } {
1564	set list {}
1565	set marker [namespace tail $marker]
1566	foreach m $_isomarkers($tf) {
1567	set sx [$m screenpos]
1568	if { $m != $marker } {
1569	if { $x >= ($sx-3) && $x <= ($sx+3) } {
1570	$marker relval [$m relval]
1571	itcl::delete object $m
1572	bell
1573	set bool 1
1574	continue
1575	}
1576	}
1577	lappend list $m
1578	}
1579	set _isomarkers($tf) $list
1580	updatetransferfuncs
1581	}
1582	return $bool
1583	}
1584
1585	itcl::body Rappture::NanovisViewer::overmarker { marker x } {
1586	set tf [$marker transferfunc]
1587	if { [info exists _isomarkers($tf)] } {
1588	set marker [namespace tail $marker]
1589	foreach m $_isomarkers($tf) {
1590	set sx [$m screenpos]
1591	if { $m != $marker } {
1592	set bool [expr { $x >= ($sx-3) && $x <= ($sx+3) }]
1593	$m activate $bool
1594	}
1595	}
1596	}
1597	return ""
1598	}
1599
1600	itcl::body Rappture::NanovisViewer::limits { tf } {
1601	set _limits(min) 0.0
1602	set _limits(max) 1.0
1603	if { ![info exists _style2datasets($tf)] } {
1604	return [array get _limits]
1605	}
1606	set min ""; set max ""
1607	foreach tag $_style2datasets($tf) {
1608	if { ![info exists _serverDatasets($tag)] } {
1609	continue
1610	}
1611	if { ![info exists _limits($tag-min)] } {
1612	continue
1613	}
1614	if { $min == "" \|\| $min > $_limits($tag-min) } {
1615	set min $_limits($tag-min)
1616	}
1617	if { $max == "" \|\| $max < $_limits($tag-max) } {
1618	set max $_limits($tag-max)
1619	}
1620	}
1621	if { $min != "" } {
1622	set _limits(min) $min
1623	}
1624	if { $max != "" } {
1625	set _limits(max) $max
1626	}
1627	return [array get _limits]
1628	}
1629
1630
1631	itcl::body Rappture::NanovisViewer::BuildViewTab {} {
1632	foreach { key value } {
1633	grid 0
1634	axes 1
1635	outline 0
1636	volume 1
1637	legend 1
1638	particles 1
1639	lic 1
1640	} {
1641	set _settings($this-$key) $value
1642	}
1643
1644	set fg [option get $itk_component(hull) font Font]
1645	#set bfg [option get $itk_component(hull) boldFont Font]
1646
1647	set inner [$itk_component(main) insert end \
1648	-title "View Settings" \
1649	-icon [Rappture::icon wrench]]
1650	$inner configure -borderwidth 4
1651
1652	set ::Rappture::NanovisViewer::_settings($this-isosurface) 0
1653	checkbutton $inner.isosurface \
1654	-text "Isosurface shading" \
1655	-variable [itcl::scope _settings($this-isosurface)] \
1656	-command [itcl::code $this AdjustSetting isosurface] \
1657	-font "Arial 9"
1658
1659	checkbutton $inner.axes \
1660	-text "Axes" \
1661	-variable [itcl::scope _settings($this-axes)] \
1662	-command [itcl::code $this AdjustSetting axes] \
1663	-font "Arial 9"
1664
1665	checkbutton $inner.grid \
1666	-text "Grid" \
1667	-variable [itcl::scope _settings($this-grid)] \
1668	-command [itcl::code $this AdjustSetting grid] \
1669	-font "Arial 9"
1670
1671	checkbutton $inner.outline \
1672	-text "Outline" \
1673	-variable [itcl::scope _settings($this-outline)] \
1674	-command [itcl::code $this AdjustSetting outline] \
1675	-font "Arial 9"
1676
1677	checkbutton $inner.legend \
1678	-text "Legend" \
1679	-variable [itcl::scope _settings($this-legend)] \
1680	-command [itcl::code $this AdjustSetting legend] \
1681	-font "Arial 9"
1682
1683	checkbutton $inner.volume \
1684	-text "Volume" \
1685	-variable [itcl::scope _settings($this-volume)] \
1686	-command [itcl::code $this AdjustSetting volume] \
1687	-font "Arial 9"
1688
1689	blt::table $inner \
1690	0,0 $inner.axes -cspan 2 -anchor w \
1691	1,0 $inner.grid -cspan 2 -anchor w \
1692	2,0 $inner.outline -cspan 2 -anchor w \
1693	3,0 $inner.volume -cspan 2 -anchor w \
1694	4,0 $inner.legend -cspan 2 -anchor w
1695
1696	if 0 {
1697	bind $inner <Map> [itcl::code $this GetVolumeInfo $inner]
1698	}
1699	blt::table configure $inner r* -resize none
1700	blt::table configure $inner r5 -resize expand
1701	}
1702
1703	itcl::body Rappture::NanovisViewer::BuildVolumeTab {} {
1704	foreach { key value } {
1705	light2side 0
1706	light 40
1707	transp 50
1708	opacity 100
1709	thickness 350
1710	} {
1711	set _settings($this-$key) $value
1712	}
1713
1714	set inner [$itk_component(main) insert end \
1715	-title "Volume Settings" \
1716	-icon [Rappture::icon volume-on]]
1717	$inner configure -borderwidth 4
1718
1719	set fg [option get $itk_component(hull) font Font]
1720	#set bfg [option get $itk_component(hull) boldFont Font]
1721
1722	checkbutton $inner.vol -text "Show volume" -font $fg \
1723	-variable [itcl::scope _settings($this-volume)] \
1724	-command [itcl::code $this AdjustSetting volume]
1725	label $inner.shading -text "Shading:" -font $fg
1726
1727	checkbutton $inner.light2side -text "Two-sided lighting" -font $fg \
1728	-variable [itcl::scope _settings($this-light2side)] \
1729	-command [itcl::code $this AdjustSetting light2side]
1730
1731	label $inner.dim -text "Glow" -font $fg
1732	::scale $inner.light -from 0 -to 100 -orient horizontal \
1733	-variable [itcl::scope _settings($this-light)] \
1734	-width 10 \
1735	-showvalue off -command [itcl::code $this AdjustSetting light]
1736	label $inner.bright -text "Surface" -font $fg
1737
1738	label $inner.fog -text "Clear" -font $fg
1739	::scale $inner.transp -from 0 -to 100 -orient horizontal \
1740	-variable [itcl::scope _settings($this-transp)] \
1741	-width 10 \
1742	-showvalue off -command [itcl::code $this AdjustSetting transp]
1743	label $inner.plastic -text "Opaque" -font $fg
1744
1745	label $inner.clear -text "Clear" -font $fg
1746	::scale $inner.opacity -from 0 -to 100 -orient horizontal \
1747	-variable [itcl::scope _settings($this-opacity)] \
1748	-width 10 \
1749	-showvalue off -command [itcl::code $this AdjustSetting opacity]
1750	label $inner.opaque -text "Opaque" -font $fg
1751
1752	label $inner.thin -text "Thin" -font $fg
1753	::scale $inner.thickness -from 0 -to 1000 -orient horizontal \
1754	-variable [itcl::scope _settings($this-thickness)] \
1755	-width 10 \
1756	-showvalue off -command [itcl::code $this AdjustSetting thickness]
1757	label $inner.thick -text "Thick" -font $fg
1758
1759	label $inner.colormap_l -text "Colormap" -font "Arial 9"
1760	itk_component add colormap {
1761	Rappture::Combobox $inner.colormap -width 10 -editable no
1762	}
1763
1764	$inner.colormap choices insert end \
1765	"BCGYR" "BCGYR" \
1766	"BGYOR" "BGYOR" \
1767	"blue" "blue" \
1768	"blue-to-brown" "blue-to-brown" \
1769	"blue-to-orange" "blue-to-orange" \
1770	"blue-to-grey" "blue-to-grey" \
1771	"green-to-magenta" "green-to-magenta" \
1772	"greyscale" "greyscale" \
1773	"nanohub" "nanohub" \
1774	"rainbow" "rainbow" \
1775	"spectral" "spectral" \
1776	"ROYGB" "ROYGB" \
1777	"RYGCB" "RYGCB" \
1778	"brown-to-blue" "brown-to-blue" \
1779	"grey-to-blue" "grey-to-blue" \
1780	"orange-to-blue" "orange-to-blue" \
1781	"none" "none"
1782
1783	$itk_component(colormap) value "BCGYR"
1784	bind $inner.colormap <<Value>> \
1785	[itcl::code $this AdjustSetting colormap]
1786
1787	blt::table $inner \
1788	0,0 $inner.vol -cspan 4 -anchor w -pady 2 \
1789	1,0 $inner.shading -cspan 4 -anchor w -pady {10 2} \
1790	2,0 $inner.light2side -cspan 4 -anchor w -pady 2 \
1791	3,0 $inner.dim -anchor e -pady 2 \
1792	3,1 $inner.light -cspan 2 -pady 2 -fill x \
1793	3,3 $inner.bright -anchor w -pady 2 \
1794	4,0 $inner.fog -anchor e -pady 2 \
1795	4,1 $inner.transp -cspan 2 -pady 2 -fill x \
1796	4,3 $inner.plastic -anchor w -pady 2 \
1797	5,0 $inner.thin -anchor e -pady 2 \
1798	5,1 $inner.thickness -cspan 2 -pady 2 -fill x\
1799	5,3 $inner.thick -anchor w -pady 2
1800
1801	blt::table configure $inner c0 c1 c3 r* -resize none
1802	blt::table configure $inner r6 -resize expand
1803	}
1804
1805	itcl::body Rappture::NanovisViewer::BuildCutplanesTab {} {
1806	set inner [$itk_component(main) insert end \
1807	-title "Cutplane Settings" \
1808	-icon [Rappture::icon cutbutton]]
1809	$inner configure -borderwidth 4
1810
1811	# X-value slicer...
1812	itk_component add xCutButton {
1813	Rappture::PushButton $inner.xbutton \
1814	-onimage [Rappture::icon x-cutplane] \
1815	-offimage [Rappture::icon x-cutplane] \
1816	-command [itcl::code $this AdjustSetting xcutplane] \
1817	-variable [itcl::scope _settings($this-xcutplane)]
1818	}
1819	Rappture::Tooltip::for $itk_component(xCutButton) \
1820	"Toggle the X cut plane on/off"
1821
1822	itk_component add xCutScale {
1823	::scale $inner.xval -from 100 -to 0 \
1824	-width 10 -orient vertical -showvalue off \
1825	-borderwidth 1 -highlightthickness 0 \
1826	-command [itcl::code $this Slice move x] \
1827	-variable [itcl::scope _settings($this-xcutposition)]
1828	} {
1829	usual
1830	ignore -borderwidth -highlightthickness
1831	}
1832	# Set the default cutplane value before disabling the scale.
1833	$itk_component(xCutScale) set 50
1834	$itk_component(xCutScale) configure -state disabled
1835	Rappture::Tooltip::for $itk_component(xCutScale) \
1836	"@[itcl::code $this SlicerTip x]"
1837
1838	# Y-value slicer...
1839	itk_component add yCutButton {
1840	Rappture::PushButton $inner.ybutton \
1841	-onimage [Rappture::icon y-cutplane] \
1842	-offimage [Rappture::icon y-cutplane] \
1843	-command [itcl::code $this AdjustSetting ycutplane] \
1844	-variable [itcl::scope _settings($this-ycutplane)]
1845	}
1846	Rappture::Tooltip::for $itk_component(yCutButton) \
1847	"Toggle the Y cut plane on/off"
1848
1849	itk_component add yCutScale {
1850	::scale $inner.yval -from 100 -to 0 \
1851	-width 10 -orient vertical -showvalue off \
1852	-borderwidth 1 -highlightthickness 0 \
1853	-command [itcl::code $this Slice move y] \
1854	-variable [itcl::scope _settings($this-ycutposition)]
1855	} {
1856	usual
1857	ignore -borderwidth -highlightthickness
1858	}
1859	Rappture::Tooltip::for $itk_component(yCutScale) \
1860	"@[itcl::code $this SlicerTip y]"
1861	# Set the default cutplane value before disabling the scale.
1862	$itk_component(yCutScale) set 50
1863	$itk_component(yCutScale) configure -state disabled
1864
1865	# Z-value slicer...
1866	itk_component add zCutButton {
1867	Rappture::PushButton $inner.zbutton \
1868	-onimage [Rappture::icon z-cutplane] \
1869	-offimage [Rappture::icon z-cutplane] \
1870	-command [itcl::code $this AdjustSetting zcutplane] \
1871	-variable [itcl::scope _settings($this-zcutplane)]
1872	}
1873	Rappture::Tooltip::for $itk_component(zCutButton) \
1874	"Toggle the Z cut plane on/off"
1875
1876	itk_component add zCutScale {
1877	::scale $inner.zval -from 100 -to 0 \
1878	-width 10 -orient vertical -showvalue off \
1879	-borderwidth 1 -highlightthickness 0 \
1880	-command [itcl::code $this Slice move z] \
1881	-variable [itcl::scope _settings($this-zcutposition)]
1882	} {
1883	usual
1884	ignore -borderwidth -highlightthickness
1885	}
1886	$itk_component(zCutScale) set 50
1887	$itk_component(zCutScale) configure -state disabled
1888	#$itk_component(zCutScale) configure -state disabled
1889	Rappture::Tooltip::for $itk_component(zCutScale) \
1890	"@[itcl::code $this SlicerTip z]"
1891
1892	blt::table $inner \
1893	1,1 $itk_component(xCutButton) \
1894	1,2 $itk_component(yCutButton) \
1895	1,3 $itk_component(zCutButton) \
1896	0,1 $itk_component(xCutScale) \
1897	0,2 $itk_component(yCutScale) \
1898	0,3 $itk_component(zCutScale)
1899
1900	blt::table configure $inner r0 r1 c* -resize none
1901	blt::table configure $inner r2 c4 -resize expand
1902	blt::table configure $inner c0 -width 2
1903	blt::table configure $inner c1 c2 c3 -padx 2
1904	}
1905
1906	itcl::body Rappture::NanovisViewer::BuildCameraTab {} {
1907	set inner [$itk_component(main) insert end \
1908	-title "Camera Settings" \
1909	-icon [Rappture::icon camera]]
1910	$inner configure -borderwidth 4
1911
1912	set row 0
1913	label $inner.orientation_l -text "View" -font "Arial 9"
1914	itk_component add orientation {
1915	Rappture::Combobox $inner.orientation -width 10 -editable no
1916	}
1917	$inner.orientation choices insert end \
1918	"1 0 0 0" "front" \
1919	"0 0 1 0" "back" \
1920	"0.707107 -0.707107 0 0" "top" \
1921	"0.707107 0.707107 0 0" "bottom" \
1922	"0.707107 0 -0.707107 0" "left" \
1923	"0.707107 0 0.707107 0" "right" \
1924	"0.853553 -0.353553 0.353553 0.146447" "default"
1925	$itk_component(orientation) value "default"
1926	bind $inner.orientation <<Value>> [itcl::code $this SetOrientation]
1927	if 1 {
1928	blt::table $inner \
1929	$row,0 $inner.orientation_l -anchor e -pady 2 \
1930	$row,1 $inner.orientation -anchor w -pady 2 -fill x
1931	blt::table configure $inner r$row -resize none
1932	incr row
1933	}
1934
1935	set labels { qw qx qy qz pan-x pan-y zoom }
1936	foreach tag $labels {
1937	label $inner.${tag}label -text $tag -font "Arial 9"
1938	entry $inner.${tag} -font "Arial 9" -bg white \
1939	-textvariable [itcl::scope _settings($this-$tag)]
1940	bind $inner.${tag} <Return> \
1941	[itcl::code $this camera set ${tag}]
1942	bind $inner.${tag} <KP_Enter> \
1943	[itcl::code $this camera set ${tag}]
1944	blt::table $inner \
1945	$row,0 $inner.${tag}label -anchor e -pady 2 \
1946	$row,1 $inner.${tag} -anchor w -pady 2
1947	blt::table configure $inner r$row -resize none
1948	incr row
1949	}
1950
1951	blt::table configure $inner c0 c1 -resize none
1952	blt::table configure $inner c2 -resize expand
1953	blt::table configure $inner r$row -resize expand
1954	}
1955
1956	# ----------------------------------------------------------------------
1957	# USAGE: Slice move x\|y\|z <newval>
1958	#
1959	# Called automatically when the user drags the slider to move the
1960	# cut plane that slices 3D data. Gets the current value from the
1961	# slider and moves the cut plane to the appropriate point in the
1962	# data set.
1963	# ----------------------------------------------------------------------
1964	itcl::body Rappture::NanovisViewer::Slice {option args} {
1965	switch -- $option {
1966	move {
1967	if {[llength $args] != 2} {
1968	error "wrong # args: should be \"Slice move x\|y\|z newval\""
1969	}
1970	set axis [lindex $args 0]
1971	set newval [lindex $args 1]
1972
1973	set newpos [expr {0.01*$newval}]
1974	set datasets [CurrentDatasets -cutplanes]
1975	set tag [lindex $datasets 0]
1976	SendCmd "cutplane position $newpos $axis $tag"
1977	}
1978	default {
1979	error "bad option \"$option\": should be axis, move, or volume"
1980	}
1981	}
1982	}
1983
1984	# ----------------------------------------------------------------------
1985	# USAGE: SlicerTip <axis>
1986	#
1987	# Used internally to generate a tooltip for the x/y/z slicer controls.
1988	# Returns a message that includes the current slicer value.
1989	# ----------------------------------------------------------------------
1990	itcl::body Rappture::NanovisViewer::SlicerTip {axis} {
1991	set val [$itk_component(${axis}CutScale) get]
1992	# set val [expr {0.01*($val-50)
1993	# *($_limits(${axis}max)-$_limits(${axis}min))
1994	# + 0.5*($_limits(${axis}max)+$_limits(${axis}min))}]
1995	return "Move the [string toupper $axis] cut plane.\nCurrently: $axis = $val%"
1996	}
1997
1998
1999	itcl::body Rappture::NanovisViewer::DoResize {} {
2000	$_arcball resize $_width $_height
2001	SendCmd "screen size $_width $_height"
2002	set _resizePending 0
2003	}
2004
2005	itcl::body Rappture::NanovisViewer::EventuallyResize { w h } {
2006	set _width $w
2007	set _height $h
2008	$_arcball resize $w $h
2009	if { !$_resizePending } {
2010	$_dispatcher event -idle !resize
2011	set _resizePending 1
2012	}
2013	}
2014
2015	itcl::body Rappture::NanovisViewer::EventuallyResizeLegend {} {
2016	if { !$_resizeLegendPending } {
2017	$_dispatcher event -idle !legend
2018	set _resizeLegendPending 1
2019	}
2020	}
2021
2022	# camera --
2023	#
2024	itcl::body Rappture::NanovisViewer::camera {option args} {
2025	switch -- $option {
2026	"show" {
2027	puts [array get _view]
2028	}
2029	"set" {
2030	set who [lindex $args 0]
2031	set x $_settings($this-$who)
2032	set code [catch { string is double $x } result]
2033	if { $code != 0 \|\| !$result } {
2034	set _settings($this-$who) $_view($who)
2035	return
2036	}
2037	switch -- $who {
2038	"pan-x" - "pan-y" {
2039	set _view($who) $_settings($this-$who)
2040	PanCamera
2041	}
2042	"qx" - "qy" - "qz" - "qw" {
2043	set _view($who) $_settings($this-$who)
2044	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
2045	$_arcball quaternion $q
2046	SendCmd "camera orient $q"
2047	}
2048	"zoom" {
2049	set _view($who) $_settings($this-$who)
2050	SendCmd "camera zoom $_view(zoom)"
2051	}
2052	}
2053	}
2054	}
2055	}
2056
2057	itcl::body Rappture::NanovisViewer::GetVolumeInfo { w } {
2058	set flowobj ""
2059	foreach key [array names _obj2flow] {
2060	set flowobj $_obj2flow($key)
2061	break
2062	}
2063	if { $flowobj == "" } {
2064	return
2065	}
2066	if { [winfo exists $w.frame] } {
2067	destroy $w.frame
2068	}
2069	set inner [frame $w.frame]
2070	blt::table $w \
2071	5,0 $inner -fill both -cspan 2 -anchor nw
2072	array set hints [$dataobj hints]
2073
2074	label $inner.volumes -text "Volumes" -font "Arial 9 bold"
2075	blt::table $inner \
2076	1,0 $inner.volumes -anchor w \
2077	blt::table configure $inner c0 c1 -resize none
2078	blt::table configure $inner c2 -resize expand
2079
2080	set row 3
2081	set volumes [get]
2082	if { [llength $volumes] > 0 } {
2083	blt::table $inner $row,0 $inner.volumes -anchor w
2084	incr row
2085	}
2086	foreach vol $volumes {
2087	array unset info
2088	array set info $vol
2089	set name $info(name)
2090	if { ![info exists _settings($this-volume-$name)] } {
2091	set _settings($this-volume-$name) $info(hide)
2092	}
2093	checkbutton $inner.vol$row -text $info(label) \
2094	-variable [itcl::scope _settings($this-volume-$name)] \
2095	-onvalue 0 -offvalue 1 \
2096	-command [itcl::code $this volume $key $name] \
2097	-font "Arial 9"
2098	Rappture::Tooltip::for $inner.vol$row $info(description)
2099	blt::table $inner $row,0 $inner.vol$row -anchor w
2100	if { !$_settings($this-volume-$name) } {
2101	$inner.vol$row select
2102	}
2103	incr row
2104	}
2105	blt::table configure $inner r* -resize none
2106	blt::table configure $inner r$row -resize expand
2107	blt::table configure $inner c3 -resize expand
2108	event generate [winfo parent [winfo parent $w]] <Configure>
2109	}
2110
2111	itcl::body Rappture::NanovisViewer::volume { tag name } {
2112	set bool $_settings($this-volume-$name)
2113	SendCmd "volume statue $bool $name"
2114	}
2115
2116	itcl::body Rappture::NanovisViewer::SetOrientation {} {
2117	set quat [$itk_component(orientation) value]
2118	set quat [$itk_component(orientation) translate $quat]
2119	foreach name { qw qx qy qz } comp $quat {
2120	set _view($name) $comp
2121	set _settings($this-$name) $comp
2122	}
2123	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
2124	$_arcball quaternion $q
2125	SendCmd "camera orient $q"
2126	SendCmd "camera reset"
2127	set $_view(pan-x) 0.0
2128	set $_view(pan-y) 0.0
2129	set $_view(zoom) 1.0
2130	set _settings($this-pan-x) $_view(pan-x)
2131	set _settings($this-pan-y) $_view(pan-y)
2132	set _settings($this-zoom) $_view(zoom)
2133	}

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