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# Lesson46.tcl # # NeHe & MainRoach's FSAA Tutorial # # This Code Was Created By Jeff Molofee 2001 # and Colt McAnlis ( MainRoach ). # If You've Found This Code Useful, Please Let Me Know. # Visit My Site At nehe.gamedev.net # # Modified for Tcl3D by Paul Obermeier 2006/08/13 # See www.tcl3d.org for the Tcl3D extension. # # This demo uses the multisampling options built into tcl3dTogl starting # from version 0.3.2. # Another way to set the number of samples is via the driver specific GUI under # Windows, or by setting the environment variable __GL_FSAA_MODE under Linux. package require tcl3d 0.5.0 # Font to be used in the Tk listbox. set gDemo(listFont) {-family {Courier} -size 10} # Display mode. set gDemo(fullScreen) false # Window size. set gDemo(winWidth) 640 set gDemo(winHeight) 480 set gDemo(doMulti) 1 set gDemo(angle) 0.0 # 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 } } # Print information about the multisampling state into last row of usage list. proc PrintFSAAInfo {} { .fr.usage configure -state normal .fr.usage delete end if { $::gDemo(doMulti) } { set sbufs [tcl3dOglGetIntState GL_SAMPLE_BUFFERS] set samples [tcl3dOglGetIntState GL_SAMPLES] if { $sbufs > 0 } { .fr.usage insert end "Multisampling: ON (Number of samples: $samples)" } else { .fr.usage insert end "Multisampling: ON (No sample buffer available)" } } else { .fr.usage insert end "Multisampling: OFF" } .fr.usage configure -state disabled } proc ToggleMultisampling { toglwin } { set ::gDemo(doMulti) [expr ! $::gDemo(doMulti)] PrintFSAAInfo $toglwin postredisplay } # Resize And Initialize The GL Window proc ReshapeCallback { toglwin { w -1 } { h -1 } } { set w [$toglwin width] set h [$toglwin height] glViewport 0 0 $w $h ; # Reset The Current Viewport glMatrixMode GL_PROJECTION ; # Select The Projection Matrix glLoadIdentity ; # Reset The Projection Matrix # Calculate The Aspect Ratio Of The Window gluPerspective 50.0 [expr double($w)/double($h)] 5 2000 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 } { global gDemo set gDemo(angle) 0.0 glShadeModel GL_SMOOTH ; # Enable Smooth Shading glClearColor 0.0 0.0 0.0 0.5 ; # Black Background glEnable GL_DEPTH_TEST ; # Enables Depth Testing } 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 } { global gDemo if { $gDemo(doMulti) } { glEnable GL_MULTISAMPLE_ARB ; # Enable Our Multisampling } # 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 for { set i -10 } { $i < 10 } { incr i } { for { set j -10 } { $j < 10 } { incr j } { glPushMatrix glTranslatef [expr {$i*2.0}] [expr {$j*2.0}] -5.0 glRotatef $gDemo(angle) 0.0 0.0 1.0 glBegin GL_QUADS glColor3f 1.0 0.0 0.0 ; glVertex3f $i $j 0.0 glColor3f 0.0 1.0 0.0 ; glVertex3f [expr {$i + 2.0}] $j 0.0 glColor3f 0.0 0.0 1.0 ; glVertex3f [expr {$i + 2.0}] [expr {$j + 2.0}] 0.0 glColor3f 1.0 1.0 1.0 ; glVertex3f $i [expr {$j + 2.0}] 0.0 glEnd glPopMatrix } } if { [info exists ::animateId] } { set gDemo(angle) [expr {$gDemo(angle) + 0.1}] } glFlush $toglwin swapbuffers if { $gDemo(doMulti) } { glDisable GL_MULTISAMPLE_ARB } } # Put all exit related code here. proc ExitProg {} { exit } # 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) \ -multisamplebuffers 1 -multisamplesamples 2 \ -swapinterval 1 \ -double true -depth true \ -createproc CreateCallback \ -reshapeproc ReshapeCallback \ -displayproc DisplayCallback listbox .fr.usage -font $::gDemo(listFont) -height 5 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 & MainRoach's FSAA Tutorial (Lesson 46)" # Watch For ESC Key And Quit Messages wm protocol . WM_DELETE_WINDOW "ExitProg" bind .