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# Lesson33.tcl # # NeHe & Evan 'terminate' Pipho's TGA Loading Tutorial # # Loading Uncompressed and Compressed .TGA Files with the Img extension. # # This Code Was Created By Evan Pipho # If You've Found This Code Useful, Please Let Me Know. # Visit My Site At nehe.gamedev.net # # Modified for Tcl3D by Paul Obermeier 2006/08/16 # See www.tcl3d.org for the Tcl3D extension. package require Img package require tcl3d 0.5.0 # Font to be used in the Tk listbox. set listFont {-family {Courier} -size 10} # Determine the directory of this script. set gDemo(scriptDir) [file dirname [info script]] # Display mode. set fullScreen false # Window size. set gDemo(winWidth) 640 set gDemo(winHeight) 480 set spin 0.0 ; # Spin Variable set texture [tcl3dVector GLuint 2] ; # Storage For Two Textures # 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 { $::fullScreen } { SetFullScreenMode . set ::fullScreen false } else { SetWindowMode . $::gDemo(winWidth) $::gDemo(winHeight) set ::fullScreen true } } proc LoadImage { imgName numChans } { if { $numChans != 3 && $numChans != 4 } { error "Error: Only 3 or 4 channels allowed ($numChans supplied)" } set texName [file join $::gDemo(scriptDir) "Data" $imgName] set retVal [catch {set phImg [image create photo -file $texName]} err1] if { $retVal != 0 } { error "Error reading image $texName ($err1)" } else { set w [image width $phImg] set h [image height $phImg] set texImg [tcl3dVectorFromPhoto $phImg $numChans] image delete $phImg } return [list $texImg $w $h] } proc LoadGLTextures {} { # Load uncompressed texture image. set imgInfo [LoadImage "Uncompressed.tga" 3] set imgData(0) [lindex $imgInfo 0] set imgWidth(0) [lindex $imgInfo 1] set imgHeight(0) [lindex $imgInfo 2] # Load compressed texture image. set imgInfo [LoadImage "Compressed.tga" 3] set imgData(1) [lindex $imgInfo 0] set imgWidth(1) [lindex $imgInfo 1] set imgHeight(1) [lindex $imgInfo 2] # Create The Textures glGenTextures 2 $::texture for { set i 0 } { $i < 2 } { incr i } { glBindTexture GL_TEXTURE_2D [$::texture get $i] glTexImage2D GL_TEXTURE_2D 0 3 $imgWidth($i) $imgHeight($i) \ 0 GL_RGB GL_UNSIGNED_BYTE $imgData($i) glTexParameteri GL_TEXTURE_2D GL_TEXTURE_MIN_FILTER $::GL_LINEAR glTexParameteri GL_TEXTURE_2D GL_TEXTURE_MAG_FILTER $::GL_LINEAR } # Delete the image data vectors. for { set i 0 } { $i < 2 } { incr i } { $imgData($i) delete } } # 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 } { LoadGLTextures ; # Jump To Texture Loading Routine glEnable GL_TEXTURE_2D ; # Enable Texture Mapping 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 } # 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] [$toglwin height] glLoadIdentity ; # Reset The Current Modelview Matrix glTranslatef 0.0 0.0 -10.0 if { [info exists ::animateId] } { set ::spin [expr {$::spin + 0.05}] } for { set loop 0 } { $loop < 20 } { incr loop } { glPushMatrix glRotatef [expr {$::spin+$loop*18.0}] 1.0 0.0 0.0 ; # Rotate On The X-Axis (Up - Down) glTranslatef -2.0 2.0 0.0 glBindTexture GL_TEXTURE_2D [$::texture get 0] glBegin GL_QUADS glTexCoord2f 0.0 1.0 ; glVertex3f -1.0 1.0 0.0 glTexCoord2f 1.0 1.0 ; glVertex3f 1.0 1.0 0.0 glTexCoord2f 1.0 0.0 ; glVertex3f 1.0 -1.0 0.0 glTexCoord2f 0.0 0.0 ; glVertex3f -1.0 -1.0 0.0 glEnd glPopMatrix glPushMatrix glTranslatef 2.0 0.0 0.0 ; # Translate 2 Units To The Right glRotatef [expr {$::spin+$loop*36.0}] 0.0 1.0 0.0 ; # Rotate On The Y-Axis (Left - Right) glTranslatef 1.0 0.0 0.0 ; # Move One Unit Right glBindTexture GL_TEXTURE_2D [$::texture get 1] glBegin GL_QUADS glTexCoord2f 0.0 1.0 ; glVertex3f -1.0 1.0 0.0 glTexCoord2f 1.0 1.0 ; glVertex3f 1.0 1.0 0.0 glTexCoord2f 1.0 0.0 ; glVertex3f 1.0 -1.0 0.0 glTexCoord2f 0.0 0.0 ; glVertex3f -1.0 -1.0 0.0 glEnd glPopMatrix } $toglwin swapbuffers } 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 } } # 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) \ -double true -depth true \ -createproc CreateCallback \ -reshapeproc ReshapeCallback \ -displayproc DisplayCallback listbox .fr.usage -font $::listFont -height 3 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 & Evan 'terminate' Pipho's TGA Loading Tutorial (Lesson 33)" # Watch For ESC Key And Quit Messages wm protocol . WM_DELETE_WINDOW "ExitProg" bind .