Demo 5 of 17 in category tcl3dOgl
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# Copyright: 2005-2024 Paul Obermeier (obermeier@tcl3d.org)
#
# See the file "Tcl3D_License.txt" for information on
# usage and redistribution of this file, and for a
# DISCLAIMER OF ALL WARRANTIES.
#
# Module: Tcl3D -> tcl3dOgl
# Filename: gluCylinder.tcl
#
# Author: Paul Obermeier
#
# Description: Tcl3D demo showing the use of gluQuadric routines
# to draw a cylinder.
package require Tk
package require tcl3d
# Font to be used in the Tk listbox.
set listFont {-family {Courier} -size 10}
# Show errors occuring in the Togl callbacks.
proc bgerror { msg } {
tk_messageBox -icon error -type ok -message "Error: $msg\n\n$::errorInfo"
exit
}
# Print info message into widget a the bottom of the window.
proc PrintInfo { msg } {
if { [winfo exists .fr.info] } {
.fr.info configure -text $msg
}
}
proc CreateCallback { toglwin } {
set mat_ambient { 0.5 0.5 0.5 1.0 }
set mat_specular { 1.0 1.0 1.0 1.0 }
set mat_shininess { 50.0 }
set light_position { 1.0 1.0 1.0 0.0 }
set model_ambient { 0.5 0.5 0.5 1.0 }
glClearColor 0.0 0.0 0.0 0.0
glMaterialfv GL_FRONT GL_AMBIENT $mat_ambient
glMaterialfv GL_FRONT GL_SPECULAR $mat_specular
glMaterialfv GL_FRONT GL_SHININESS $mat_shininess
glLightfv GL_LIGHT0 GL_POSITION $light_position
glLightModelfv GL_LIGHT_MODEL_AMBIENT $model_ambient
glEnable GL_LIGHTING
glEnable GL_LIGHT0
glEnable GL_DEPTH_TEST
}
proc DisplayCallback { toglwin } {
glClear [expr $::GL_COLOR_BUFFER_BIT | $::GL_DEPTH_BUFFER_BIT]
# Viewport command is not really needed, but has been inserted for
# Mac OSX. Presentation framework (Tk) does not send a reshape event,
# when switching from one demo to another.
glViewport 0 0 [$toglwin width] [$toglwin height]
glEnable GL_LIGHTING
glShadeModel GL_SMOOTH
glLoadIdentity
glRotatef 45 1 0 0
set qobj [gluNewQuadric]
gluQuadricOrientation $qobj GLU_OUTSIDE
gluQuadricDrawStyle $qobj GLU_FILL
gluQuadricNormals $qobj GLU_FLAT
gluCylinder $qobj 0.5 0.5 1.0 15 5
glFlush
$toglwin swapbuffers
}
proc ReshapeCallback { toglwin { w -1 } { h -1 } } {
set w [$toglwin width]
set h [$toglwin height]
glViewport 0 0 $w $h
glMatrixMode GL_PROJECTION
glLoadIdentity
if { $w <= $h } {
glOrtho -2.5 2.5 \
[expr -2.5*double($h)/double($w)] \
[expr 2.5*double($h)/double($w)] \
-10.0 10.0
} else {
glOrtho [expr -2.5*double($w)/double($h)] \
[expr 2.5*double($w)/double($h)] \
-2.5 2.5 -10.0 10.0
}
glMatrixMode GL_MODELVIEW
glLoadIdentity
}
frame .fr
pack .fr -expand 1 -fill both
togl .fr.toglwin -width 500 -height 500 \
-double true -depth true \
-createcommand CreateCallback \
-reshapecommand ReshapeCallback \
-displaycommand DisplayCallback
listbox .fr.usage -height 1 -font $listFont
label .fr.info
grid .fr.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: Cylinder with gluQuadric"
bind . <Key-Escape> "exit"
.fr.usage insert end "Key-Escape Exit"
.fr.usage configure -state disabled
PrintInfo [tcl3dOglGetInfoString]
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