Demo 6 of 9 in category NPS-Tutorials
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# NPS07_TestSwitchDOF.tcl
#
# Original C++ code by Joseph Sullivan.
# See http://www.openscenegraph.org/projects/osg/wiki/Support/Tutorials
# for the original files.
#
# Modified for Tcl3D by Paul Obermeier 2009/03/20.
# See www.tcl3d.org for the Tcl3D extension.
package require tcl3d
if { ! [tcl3dHaveOsg] } {
tk_messageBox -icon error -type ok -title "Missing Tcl3D module" \
-message "Demo needs the tcl3dOSG module."
proc Cleanup {} {}
exit 1
return
}
# Font to be used in the Tk listbox.
set gDemo(listFont) {-family {Courier} -size 10}
# Window size.
set gDemo(winWidth) 640
set gDemo(winHeight) 480
# Determine the directory and filename of this script.
set gDemo(scriptFile) [info script]
set gDemo(scriptDir) [file dirname $gDemo(scriptFile)]
# Show errors occuring in the Togl callbacks.
proc bgerror { msg } {
puts "Error: $msg\n\n$::errorInfo"
tk_messageBox -icon error -type ok -message "Error: $msg\n\n$::errorInfo"
ExitProg
}
# Print info message into widget a the bottom of the window.
proc PrintInfo { msg } {
if { [winfo exists .fr.info] } {
.fr.info configure -text $msg
}
}
# Idle callback to redisplay the scene.
proc Animate {} {
.fr.toglwin postredisplay
set ::animateId [tcl3dAfterIdle Animate]
}
proc StartAnimation {} {
if { ! [info exists ::animateId] } {
Animate
}
}
proc StopAnimation {} {
if { [info exists ::animateId] } {
after cancel $::animateId
unset ::animateId
}
}
proc CreateCallback { toglwin } {
}
proc ReshapeCallback { toglwin { w -1 } { h -1 } } {
set w [$toglwin width]
set h [$toglwin height]
# Propagate resize event to embedded OSG window.
tcl3dOsgWindowResize $toglwin [tcl3dOsgGetOsgWin] $w $h
}
proc DisplayCallback { toglwin } {
if { [viewer valid] } {
viewer frame
}
$toglwin swapbuffers
}
proc Cleanup {} {
uplevel #0 unset gDemo
viewer -delete
}
proc ExitProg {} {
exit
}
proc SaveOsgToFile {} {
global gDemo
set osgRoot [viewer getSceneData]
set outFile [format "%s.osgt" [file rootname $gDemo(scriptFile)]]
# Create a name on the file system, if running from within a Starpack.
set outFile [tcl3dGenExtName $outFile]
puts "Saving scenegraph to file $outFile"
if { ! [osgDB::writeNodeFile $osgRoot $outFile] } {
puts "Failed to write scenegraph to file $outFile"
}
}
proc CreateWidgets { osgwin } {
global gDemo
frame .fr
pack .fr -expand 1 -fill both
set toglwin .fr.toglwin
togl $toglwin -width $gDemo(winWidth) -height $gDemo(winHeight) \
-double true -depth true -alpha true \
-createcommand CreateCallback \
-reshapecommand ReshapeCallback \
-displaycommand DisplayCallback
listbox .fr.usage -font $::gDemo(listFont) -height 3
label .fr.info
grid $toglwin -row 0 -column 0 -sticky news
grid .fr.usage -row 1 -column 0 -sticky news
grid .fr.info -row 2 -column 0 -sticky news
grid rowconfigure .fr 0 -weight 1
grid columnconfigure .fr 0 -weight 1
wm title . "Tcl3D demo: Sullivan's OSG tutorial #7 (TestSwitchDOF)"
wm protocol . WM_DELETE_WINDOW "ExitProg"
bind . <Key-Escape> "ExitProg"
bind . <Key-f> "SaveOsgToFile"
# Propagate key and mouse events to embedded OSG window.
bind . <KeyPress> "tcl3dOsgKeyPress $toglwin $osgwin %N"
tcl3dOsgAddTrackballBindings $toglwin $osgwin
.fr.usage insert end "Key-Escape Exit"
.fr.usage insert end "Key-f Save SceneGraph to file"
.fr.usage insert end "Mouse Trackball"
.fr.usage configure -state disabled
}
#
# Start of tutorial specific code.
#
proc addTextLabel { g s } {
if { $g eq "NULL" } {
return false
}
osg::Geode textLabelGeode
osgText::Text textOne
$g addChild textLabelGeode
textLabelGeode addDrawable textOne
textOne setCharacterSize 1
textOne setFont "./Data/impact.ttf"
textOne setText $s
textOne setAxisAlignment $::osgText::Text_SCREEN
textOne setColor [osg::Vec4 v4 1 0 0 1]
textOne setPosition [osg::Vec3 v3 2 1 -1]
textOne setAlignment $::osgText::Text_CENTER_TOP
return true
}
# Visitor callback procedure to clear the animation of DOF nodes.
proc ClearDOFNodesCB { node args } {
set nodeType [osg::Object_className $node]
if { $nodeType eq "DOFTransform" } {
osgSim::DOFTransform_setAnimationOn $node false
}
}
proc InitSearch {} {
global gSearch
set gSearch(foundList) [list]
}
proc GetSearchResult { { pos 0 } } {
global gSearch
return [lindex $gSearch(foundList) $pos]
}
# Visitor callback procedure to search for a node with a specified name.
# Note, that global variable gSearch(foundList) must be reset to an empty list
# before starting a new search via "accept".
proc SearchNodeCB { node args } {
global gSearch
set nodeName [osg::Object_getName $node]
if { $nodeName eq $args } {
lappend gSearch(foundList) $node
}
}
osgViewer::ViewerRef viewer [osgViewer::Viewer]
# Declare a group for the root of our tree and
# three groups to contain individual tank models
osg::Group root
# Load the models from the same file
set tankFile [file join $::gDemo(scriptDir) "Data/Models/t72-tank/t72-tank_des.flt"]
set tankOneGroup [osg::Node_asGroup [osgDB::readNodeFile $tankFile]]
set tankTwoGroup [osg::Node_asGroup [osgDB::readNodeFile $tankFile]]
set tankThreeGroup [osg::Node_asGroup [osgDB::readNodeFile $tankFile]]
# quit if we didn't successfully load the models
if { $tankOneGroup eq "" || $tankTwoGroup eq "" || $tankThreeGroup eq "" } {
puts "Could not load tank models"
exit 1
}
# findNodeVisitor will turn osgSim::DOFTransform nodes
# animation field to false
osg::tcl3dOsgNodeVisitor nv1 ClearDOFNodesCB
$tankOneGroup accept nv1
# add the first tank as a child of the root node
root addChild $tankOneGroup
# declare a transform for positioning the second tank
osg::PositionAttitudeTransform tankTwoPAT
# move the second tank five units right, five units forward
tankTwoPAT setPosition [osg::Vec3d pos2 5 5 0]
# add the tank as a child of its transform to the scene
root addChild tankTwoPAT
tankTwoPAT addChild $tankTwoGroup
# declare a transform for positioning the third tank
osg::PositionAttitudeTransform tankThreePAT
# move the third tank ten units right
tankThreePAT setPosition [osg::Vec3d pos3 10 0 0]
# rotate the tank model 22.5 degrees to the left
# (to demonstrate that rotation of the turret will be
# relative to the tank's heading)
tankThreePAT setAttitude [osg::Quat quat3 [expr 3.14159/8.0] [osg::Vec3 rotAxis 0 0 1]]
# add the tank as a child of its transform to the scene
root addChild tankThreePAT
tankThreePAT addChild $tankThreeGroup
# Declare a new instance of a NodeVisitor class and set its
# searchForName string equal to "sw1"
osg::tcl3dOsgNodeVisitor nv2 SearchNodeCB "sw1"
# Initiate traversal of this NodeVisitor instance starting
# from tankTwoGroup, searching all its children. Build a list
# of nodes whose names matched the searchForName string above.
InitSearch
$tankTwoGroup accept nv2
# Declare a switch type and assign it to the first node
# in our list of matching nodes.
set tankSwitch [GetSearchResult]
# make sure it's a valid handle. If it is, set the first (only)
# multi-switch:
if { [osg::Object_className $tankSwitch] eq "MultiSwitch" } {
osgSim::MultiSwitch_setSingleChildOn $tankSwitch 0 1 ; # bad model
}
# Declare a new instance of a NodeVisitor class; set the name to search
# for to "turret".
osg::tcl3dOsgNodeVisitor nv3 SearchNodeCB "turret"
InitSearch
# Initiate a traversal starting from the subtree that represents
# the third tank model we loaded.
$tankThreeGroup accept nv3
# Make sure we found a node and it's the correct type
set turretDOF [GetSearchResult]
# if it's a valid DOF node, set the heading of the turret
# to 22.5 degrees right relative to the tank's heading.
if { [osg::Object_className $turretDOF] eq "DOFTransform" } {
osgSim::DOFTransform_setCurrentHPR $turretDOF [osg::Vec3 turret [expr -3.14159/4.0] 0.0 0.0]
}
# Declare an instance of 'findNodeVisitor'; set the name to search for to "gun"
osg::tcl3dOsgNodeVisitor nv4 SearchNodeCB "gun"
InitSearch
# Initiate a traversal from the subtree that represents the third
# tank model we loaded.
$tankThreeGroup accept nv4
# Make sure we found a node and it's the correct type
set gunDOF [GetSearchResult]
# If the node we found is a valid DOF transform, set the pitch
# to 22.5 degrees up relative to the turret's pitch.
if { [osg::Object_className $gunDOF] eq "DOFTransform" } {
osgSim::DOFTransform_setCurrentHPR $gunDOF [osg::Vec3 gun 0.0 [expr 3.14159/8.0] 0.0]
}
addTextLabel $tankOneGroup "Original Tank"
addTextLabel $tankTwoGroup "Damaged State"
addTextLabel $tankThreeGroup "Articulated"
viewer setSceneData root
viewer setCameraManipulator [osgGA::TrackballManipulator]
if { $argc >= 1 && [lindex $argv 0] eq "-viewer" } {
# Only use the standard OSG viewer window without any Tk widgets.
viewer setUpViewInWindow 50 50 500 400
viewer run
exit 0
}
# Use the OSG viewer inside a Togl widget.
set osgwin [viewer setUpViewerAsEmbeddedInWindow 50 50 500 400]
tcl3dOsgSetOsgWin $osgwin
viewer realize
CreateWidgets $osgwin
PrintInfo [tcl3dOsgGetInfoString]
if { [file tail [info script]] eq [file tail $::argv0] } {
# If started directly from tclsh or wish, then start animation.
update
StartAnimation
}
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