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# Lesson04.tcl # # NeHe's Rotation Tutorial # # This Code Was Created By Jeff Molofee 2000 # A HUGE Thanks To Fredric Echols For Cleaning Up # And Optimizing This Code, Making It More Flexible! # If You've Found This Code Useful, Please Let Me Know. # Visit My Site At nehe.gamedev.net # # Modified for Tcl3D by Paul Obermeier 2006/01/25 # See www.tcl3d.org for the Tcl3D extension. package require tcl3d 0.5.0 # Font to be used in the Tk listbox. set gDemo(listFont) {-family {Courier} -size 10} # Obtain the name of this script file. set gDemo(scriptFile) [info script] # Display mode. set gDemo(fullScreen) false # Window size. set gDemo(winWidth) 640 set gDemo(winHeight) 480 set gDemo(rtri) 0.0 ; # Angle For The Triangle ( NEW ) set gDemo(rquad) 0.0 ; # Angle For The Quad ( NEW ) # Show errors occuring in the Togl callbacks. proc bgerror { msg } { 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 } } proc SetFullScreenMode { win } { set sh [winfo screenheight $win] set sw [winfo screenwidth $win] wm minsize $win $sw $sh wm maxsize $win $sw $sh set fmtStr [format "%dx%d+0+0" $sw $sh] wm geometry $win $fmtStr wm overrideredirect $win 1 focus -force $win } proc SetWindowMode { win w h } { set sh [winfo screenheight $win] set sw [winfo screenwidth $win] wm minsize $win 10 10 wm maxsize $win $sw $sh set fmtStr [format "%dx%d+0+25" $w $h] wm geometry $win $fmtStr wm overrideredirect $win 0 focus -force $win } # Toggle between windowing and fullscreen mode. proc ToggleWindowMode {} { if { $::gDemo(fullScreen) } { SetFullScreenMode . set ::gDemo(fullScreen) false } else { SetWindowMode . $::gDemo(winWidth) $::gDemo(winHeight) set ::gDemo(fullScreen) true } } # Resize And Initialize The GL Window proc ReshapeCallback { toglwin { w -1 } { h -1 } } { set w [$toglwin width] set h [$toglwin height] glViewport 0 0 $w $h ; # Reset The Current Viewport glMatrixMode GL_PROJECTION ; # Select The Projection Matrix glLoadIdentity ; # Reset The Projection Matrix # Calculate The Aspect Ratio Of The Window gluPerspective 45.0 [expr double($w)/double($h)] 0.1 100.0 glMatrixMode GL_MODELVIEW ; # Select The Modelview Matrix glLoadIdentity ; # Reset The Modelview Matrix set ::gDemo(winWidth) $w set ::gDemo(winHeight) $h } # All Setup For OpenGL Goes Here proc CreateCallback { toglwin } { glShadeModel GL_SMOOTH ; # Enable Smooth Shading glClearColor 0.0 0.0 0.0 0.5 ; # Black Background glClearDepth 1.0 ; # Depth Buffer Setup glEnable GL_DEPTH_TEST ; # Enables Depth Testing glDepthFunc GL_LEQUAL ; # The Type Of Depth Testing To Do glHint GL_PERSPECTIVE_CORRECTION_HINT GL_NICEST ; # Really Nice Perspective Calculations } 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 } } # Here's Where We Do All The Drawing proc DisplayCallback { toglwin } { # Clear Screen And Depth Buffer 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] glLoadIdentity ; # Reset The Current Modelview Matrix glTranslatef -1.5 0.0 -6.0 ; # Move Left 1.5 Units And Into The Screen 6.0 glRotatef $::gDemo(rtri) 0.0 1.0 0.0 ; # Rotate The Triangle On The Y axis ( NEW ) glBegin GL_TRIANGLES ; # Drawing Using Triangles glColor3f 1.0 0.0 0.0 ; # Set The Color To Red glVertex3f 0.0 1.0 0.0 ; # Top glColor3f 0.0 1.0 0.0 ; # Set The Color To Green glVertex3f -1.0 -1.0 0.0 ; # Bottom Left glColor3f 0.0 0.0 1.0 ; # Set The Color To Blue glVertex3f 1.0 -1.0 0.0 ; # Bottom Right glEnd ; # Finished Drawing The Triangle glLoadIdentity ; # Reset The Current Modelview Matrix glTranslatef 1.5 0.0 -6.0 ; # Move Right 1.5 Units And Into The Screen 6.0 glRotatef $::gDemo(rquad) 1.0 0.0 0.0 ; # Rotate The Quad On The X axis ( NEW ) glColor3f 0.5 0.5 1.0 ; # Set The Color To Blue One Time Only glBegin GL_QUADS ; # Draw A Quad glVertex3f -1.0 1.0 0.0 ; # Top Left glVertex3f 1.0 1.0 0.0 ; # Top Right glVertex3f 1.0 -1.0 0.0 ; # Bottom Right glVertex3f -1.0 -1.0 0.0 ; # Bottom Left glEnd set ::gDemo(rtri) [expr $::gDemo(rtri) + 0.2] ; # Increase The Rotation Variable For The Triangle ( NEW ) set ::gDemo(rquad) [expr $::gDemo(rquad) -0.15] ; # Decrease The Rotation Variable For The Quad ( NEW ) $toglwin swapbuffers } proc Cleanup {} { uplevel #0 unset gDemo } # Put all exit related code here. proc ExitProg {} { exit } # Create a PDF file of the window contents. proc CreatePdf { toglwin } { if { ([info procs tcl3dHaveGl2ps] eq "tcl3dHaveGl2ps") && \ [tcl3dHaveGl2ps] } { set fileName [format "%s.%s" [file rootname $::gDemo(scriptFile)] "pdf"] # Create a name on the file system, if running from within a Starpack. set fileName [tcl3dGenExtName $fileName] tcl3dGl2psCreatePdf $toglwin $fileName "[wm title .]" } else { tk_messageBox -icon info -type ok -title "Info" \ -message "PDF creation needs the gl2ps extension.\n\ Available in Tcl3D versions greater than 0.3." } $toglwin postredisplay } # Create the OpenGL window and some Tk helper widgets. proc CreateWindow {} { frame .fr pack .fr -expand 1 -fill both # Create Our OpenGL Window togl .fr.toglwin -width $::gDemo(winWidth) -height $::gDemo(winHeight) \ -swapinterval 1 \ -double true -depth true \ -createproc CreateCallback \ -reshapeproc ReshapeCallback \ -displayproc DisplayCallback listbox .fr.usage -font $::gDemo(listFont) -height 4 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: NeHe's Rotation Tutorial (Lesson 4)" # Watch For ESC Key And Quit Messages wm protocol . WM_DELETE_WINDOW "ExitProg" bind .