#
# OpenGL 4.1 with GLEW - Example 14
#
# @author Norbert Nopper norbert@nopper.tv
# @version 1.0
#
# Homepage: https://github.com/McNopper/OpenGL
#
# Copyright Norbert Nopper
#
# Modified for Tcl3D by Paul Obermeier 2011/08/19
# See www.tcl3d.org for the Tcl3D extension.
package require Tk
package require Img
package require tcl3d
# Font to be used in the Tk listbox.
set g_Demo(listFont) {-family {Courier} -size 10}
# Obtain the name of this script file.
set g_Demo(scriptDir) [file dirname [info script]]
# Window size.
set g_Demo(winWidth) 640
set g_Demo(winHeight) 480
# The number of waves. Also has to be changed in the shader.
set g_Demo(NumWaves) 4
set overallSteepness 0.2
# params: speed, amplitude, wavelength, steepness
# dirs : x, z
set g_Wave(tex,params) [list]
set g_Wave(tex,dirs) [list]
# Wave One
lappend g_Wave(tex,params) 0.05
lappend g_Wave(tex,params) 0.02
lappend g_Wave(tex,params) 0.3
lappend g_Wave(tex,params) [expr { $overallSteepness / (0.3 * 0.02 * $g_Demo(NumWaves)) }]
lappend g_Wave(tex,dirs) 1.0
lappend g_Wave(tex,dirs) 1.5
# Wave Two
lappend g_Wave(tex,params) 0.1
lappend g_Wave(tex,params) 0.01
lappend g_Wave(tex,params) 0.4
lappend g_Wave(tex,params) [expr { $overallSteepness / (0.4 * 0.01 * $g_Demo(NumWaves)) }]
lappend g_Wave(tex,dirs) 0.8
lappend g_Wave(tex,dirs) 0.2
# Wave Three
lappend g_Wave(tex,params) 0.04
lappend g_Wave(tex,params) 0.035
lappend g_Wave(tex,params) 0.1
lappend g_Wave(tex,params) [expr { $overallSteepness / (0.4 * 0.01 * $g_Demo(NumWaves)) }]
lappend g_Wave(tex,dirs) -0.2
lappend g_Wave(tex,dirs) -0.1
# Wave Four
lappend g_Wave(tex,params) 0.05
lappend g_Wave(tex,params) 0.007
lappend g_Wave(tex,params) 0.2
lappend g_Wave(tex,params) [expr { $overallSteepness / (0.4 * 0.01 * $g_Demo(NumWaves)) }]
lappend g_Wave(tex,dirs) -0.4
lappend g_Wave(tex,dirs) -0.3
set g_Wave(wat,params) [list]
set g_Wave(wat,dirs) [list]
# Wave One
lappend g_Wave(wat,params) 1.0
lappend g_Wave(wat,params) 0.01
lappend g_Wave(wat,params) 4.0
lappend g_Wave(wat,params) [expr { $overallSteepness / (4.0 * 0.01 * $g_Demo(NumWaves)) }]
lappend g_Wave(wat,dirs) 1.0
lappend g_Wave(wat,dirs) 1.0
# Wave Two
lappend g_Wave(wat,params) 0.5
lappend g_Wave(wat,params) 0.02
lappend g_Wave(wat,params) 3.0
lappend g_Wave(wat,params) [expr { $overallSteepness / (3.0 * 0.02 * $g_Demo(NumWaves)) }]
lappend g_Wave(wat,dirs) 1.0
lappend g_Wave(wat,dirs) 0.0
# Wave Three
lappend g_Wave(wat,params) 0.1
lappend g_Wave(wat,params) 0.015
lappend g_Wave(wat,params) 2.0
lappend g_Wave(wat,params) [expr { $overallSteepness / (3.0 * 0.02 * $g_Demo(NumWaves)) }]
lappend g_Wave(wat,dirs) -0.1
lappend g_Wave(wat,dirs) -0.2
# Wave Four
lappend g_Wave(wat,params) 1.1
lappend g_Wave(wat,params) 0.008
lappend g_Wave(wat,params) 1.0
lappend g_Wave(wat,params) [expr { $overallSteepness / (3.0 * 0.02 * $g_Demo(NumWaves)) }]
lappend g_Wave(wat,dirs) -0.2
lappend g_Wave(wat,dirs) -0.1
# Length (width and height) of the water surface.
set g_Demo(WaterPlaneLen) 128
# Size of the normal map texture.
set g_Demo(TexSize) 1024
set g_Demo(passedTime) 0.0
set g_Demo(angle) 0.0
# Projection matrices.
set g_Demo(projection) [tcl3dVector GLfloat 16]
set g_Demo(projectionTexture) [tcl3dVector GLfloat 16]
# ModelView matrices.
set g_Demo(modelView) [tcl3dVector GLfloat 16]
set g_Demo(modelViewTexture) [tcl3dVector GLfloat 16]
# Inverse camera needed for the final reflect/refract normal calculation in the shader.
set g_Demo(inverseCamera) [tcl3dVector GLfloat 16]
# A stop watch to get current time.
set g_Demo(stopWatch) [tcl3dNewSwatch]
tcl3dStartSwatch $g_Demo(stopWatch)
set g_Demo(lastTime) [tcl3dLookupSwatch $g_Demo(stopWatch)]
# 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 Animate {} {
global g_Demo
.fr.toglwin postredisplay
set g_Demo(animateId) [tcl3dAfterIdle Animate]
}
proc StartAnimation {} {
global g_Demo
if { ! [info exists g_Demo(animateId)] } {
Animate
tcl3dStartSwatch $g_Demo(stopWatch)
}
}
proc StopAnimation {} {
global g_Demo
if { [info exists g_Demo(animateId)] } {
after cancel $g_Demo(animateId)
unset g_Demo(animateId)
tcl3dStopSwatch $g_Demo(stopWatch)
}
}
proc InitTexture { waterPlaneLength } {
global g_Demo g_ProgramTexture
# Load the source of the vertex shader.
set vertexSource [tcl3dOglReadShaderFile [file join $g_Demo(scriptDir) "VertexWaterTexture.vs"]]
# Load the source of the fragment shader.
set fragmentSource [tcl3dOglReadShaderFile [file join $g_Demo(scriptDir) "FragmentWaterTexture.fs"]]
set g_ProgramTexture [tcl3dOglBuildProgram $vertexSource "" "" "" $fragmentSource]
set programTexture [dict get $g_ProgramTexture program]
set g_Demo(vaoTexture) [tcl3dVector GLuint 1]
glGenVertexArrays 1 $g_Demo(vaoTexture)
glBindVertexArray [$g_Demo(vaoTexture) get 0]
set plane [glusCreatePlane [expr {$g_Demo(TexSize)*0.5}] [expr {$g_Demo(TexSize)*0.5}]]
set g_Demo(numIndicesTexture) [dict get $plane numIndices]
set g_Demo(projectionLocationTexture) [glGetUniformLocation $programTexture "projectionMatrix"]
set g_Demo(modelViewLocationTexture) [glGetUniformLocation $programTexture "modelViewMatrix"]
set g_Demo(waterPlaneLengthLocationTexture) [glGetUniformLocation $programTexture "waterPlaneLength"]
set g_Demo(passedTimeLocationTexture) [glGetUniformLocation $programTexture "passedTime"]
set g_Demo(waveParametersLocationTexture) [glGetUniformLocation $programTexture "waveParameters"]
set g_Demo(waveDirectionsLocationTexture) [glGetUniformLocation $programTexture "waveDirections"]
set g_Demo(vertexLocationTexture) [glGetAttribLocation $programTexture "vertex"]
set g_Demo(texCoordLocationTexture) [glGetAttribLocation $programTexture "texCoord"]
set g_Demo(verticesTexture) [tcl3dVector GLuint 1]
glGenBuffers 1 $g_Demo(verticesTexture)
glBindBuffer GL_ARRAY_BUFFER [$g_Demo(verticesTexture) get 0]
set vertexVec [dict get $plane vertexVec]
glBufferData GL_ARRAY_BUFFER \
[expr [dict get $plane numVertices]*4*[$vertexVec elemsize]] \
$vertexVec GL_STATIC_DRAW
set g_Demo(texCoordsTexture) [tcl3dVector GLuint 1]
glGenBuffers 1 $g_Demo(texCoordsTexture)
glBindBuffer GL_ARRAY_BUFFER [$g_Demo(texCoordsTexture) get 0]
set texCoordVec [dict get $plane texCoordVec]
glBufferData GL_ARRAY_BUFFER \
[expr [dict get $plane numVertices]*2*[$texCoordVec elemsize]] \
$texCoordVec GL_STATIC_DRAW
set g_Demo(indicesTexture) [tcl3dVector GLuint 1]
glGenBuffers 1 $g_Demo(indicesTexture)
glBindBuffer GL_ELEMENT_ARRAY_BUFFER [$g_Demo(indicesTexture) get 0]
set indexVec [dict get $plane indexVec]
glBufferData GL_ELEMENT_ARRAY_BUFFER \
[expr [dict get $plane numIndices]*[$indexVec elemsize]] \
$indexVec GL_STATIC_DRAW
glusDestroyShape $plane
glUseProgram $programTexture
tcl3dMatfIdentity $g_Demo(modelViewTexture)
tcl3dLookAt 0.0 0.0 5.0 0.0 0.0 0.0 0.0 1.0 0.0 $g_Demo(modelViewTexture)
set modelViewAsList [tcl3dVectorToList $g_Demo(modelViewTexture) 16]
glUniformMatrix4fv $g_Demo(modelViewLocationTexture) 1 GL_FALSE $modelViewAsList
glUniform1f $g_Demo(waterPlaneLengthLocationTexture) $waterPlaneLength
glBindBuffer GL_ARRAY_BUFFER [$g_Demo(verticesTexture) get 0]
glVertexAttribPointer $g_Demo(vertexLocationTexture) 4 GL_FLOAT GL_FALSE 0 "NULL"
glEnableVertexAttribArray $g_Demo(vertexLocationTexture)
glBindBuffer GL_ARRAY_BUFFER [$g_Demo(texCoordsTexture) get 0]
glVertexAttribPointer $g_Demo(texCoordLocationTexture) 2 GL_FLOAT GL_FALSE 0 "NULL"
glEnableVertexAttribArray $g_Demo(texCoordLocationTexture)
glClearColor 0.0 0.0 0.0 0.0
glClearDepth 1.0
glEnable GL_DEPTH_TEST
glEnable GL_CULL_FACE
set g_Demo(textureTexture) [tcl3dVector GLuint 1]
glGenTextures 1 $g_Demo(textureTexture)
glActiveTexture GL_TEXTURE1
glBindTexture GL_TEXTURE_2D [$g_Demo(textureTexture) get 0]
glTexImage2D GL_TEXTURE_2D 0 $::GL_RGB \
$g_Demo(TexSize) $g_Demo(TexSize) \
0 GL_RGB GL_UNSIGNED_BYTE "NULL"
glTexParameteri GL_TEXTURE_2D GL_TEXTURE_MIN_FILTER $::GL_LINEAR
glTexParameteri GL_TEXTURE_2D GL_TEXTURE_MAG_FILTER $::GL_LINEAR
glTexParameterf GL_TEXTURE_2D GL_TEXTURE_WRAP_S $::GL_REPEAT
glTexParameterf GL_TEXTURE_2D GL_TEXTURE_WRAP_T $::GL_REPEAT
set g_Demo(fboTexture) [tcl3dVector GLuint 1]
glGenFramebuffers 1 $g_Demo(fboTexture)
glBindFramebuffer GL_FRAMEBUFFER [$g_Demo(fboTexture) get 0]
set g_Demo(depthTexture) [tcl3dVector GLuint 1]
glGenRenderbuffers 1 $g_Demo(depthTexture)
glBindRenderbuffer GL_RENDERBUFFER [$g_Demo(depthTexture) get 0]
glRenderbufferStorage GL_RENDERBUFFER GL_DEPTH_COMPONENT $g_Demo(TexSize) $g_Demo(TexSize)
glFramebufferTexture2D GL_FRAMEBUFFER GL_COLOR_ATTACHMENT0 GL_TEXTURE_2D [$g_Demo(textureTexture) get 0] 0
glFramebufferRenderbuffer GL_FRAMEBUFFER GL_DEPTH_ATTACHMENT GL_RENDERBUFFER [$g_Demo(depthTexture) get 0]
if { [glCheckFramebufferStatus GL_FRAMEBUFFER] != $::GL_FRAMEBUFFER_COMPLETE } {
puts [format "GL_FRAMEBUFFER_COMPLETE error 0x%x" [glCheckFramebufferStatus GL_FRAMEBUFFER]]
}
glBindTexture GL_TEXTURE_2D 0
glBindFramebuffer GL_FRAMEBUFFER 0
return [$g_Demo(textureTexture) get 0]
}
# Function for initialization.
proc Init {} {
global g_Demo g_Program g_ProgramBackground
# Points of a triangle.
for { set z 0 } { $z < $g_Demo(WaterPlaneLen) } { incr z } {
for { set x 0 } { $x < $g_Demo(WaterPlaneLen) } { incr x } {
lappend pointList [expr { -$g_Demo(WaterPlaneLen)*0.5 + 0.5 + double ($x) }]
lappend pointList 0.0
lappend pointList [expr { $g_Demo(WaterPlaneLen)*0.5 - 0.5 - double ($z) }]
lappend pointList 1.0
}
}
set pointVec [tcl3dVectorFromList GLfloat $pointList]
set pointVecSize [expr {[llength $pointList] * [$pointVec elemsize]}]
for { set k 0 } { $k < [expr {$g_Demo(WaterPlaneLen)-1}] } { incr k } {
for { set i 0 } { $i < $g_Demo(WaterPlaneLen) } { incr i } {
if { $k%2 == 0 } {
lappend indicesList [expr { $i + $k*$g_Demo(WaterPlaneLen) }]
lappend indicesList [expr { $i + ($k+1)*$g_Demo(WaterPlaneLen) }]
} else {
lappend indicesList [expr { $g_Demo(WaterPlaneLen) -1 - $i + $k*$g_Demo(WaterPlaneLen) }]
lappend indicesList [expr { $g_Demo(WaterPlaneLen) -1 - $i + ($k+1)*$g_Demo(WaterPlaneLen) }]
}
}
}
set indicesVec [tcl3dVectorFromList GLuint $indicesList]
set indicesVecSize [expr {[llength $indicesList] * [$indicesVec elemsize]}]
# Load the source of the vertex shader.
set vertexSource [tcl3dOglReadShaderFile [file join $g_Demo(scriptDir) "Vertex.vs"]]
# Load the source of the fragment shader.
set fragmentSource [tcl3dOglReadShaderFile [file join $g_Demo(scriptDir) "Fragment.fs"]]
set g_Program [tcl3dOglBuildProgram $vertexSource "" "" "" $fragmentSource]
set program [dict get $g_Program program]
set g_Demo(vao) [tcl3dVector GLuint 1]
glGenVertexArrays 1 $g_Demo(vao)
glBindVertexArray [$g_Demo(vao) get 0]
set g_Demo(projectionLocation) [glGetUniformLocation $program "projectionMatrix"]
set g_Demo(modelViewLocation) [glGetUniformLocation $program "modelViewMatrix"]
set g_Demo(waterPlaneLengthLocation) [glGetUniformLocation $program "waterPlaneLength"]
set g_Demo(inverseCameraLocation) [glGetUniformLocation $program "inverseCameraMatrix"]
set g_Demo(cubemapLocation) [glGetUniformLocation $program "cubemap"]
set g_Demo(waterLocation) [glGetUniformLocation $program "waterTexture"]
set g_Demo(passedTimeLocation) [glGetUniformLocation $program "passedTime"]
set g_Demo(waveParametersLocation) [glGetUniformLocation $program "waveParameters"]
set g_Demo(waveDirectionsLocation) [glGetUniformLocation $program "waveDirections"]
set g_Demo(vertexLocation) [glGetAttribLocation $program "vertex"]
set g_Demo(vertices) [tcl3dVector GLuint 1]
glGenBuffers 1 $g_Demo(vertices)
glBindBuffer GL_ARRAY_BUFFER [$g_Demo(vertices) get 0]
glBufferData GL_ARRAY_BUFFER $pointVecSize $pointVec GL_STATIC_DRAW
set g_Demo(indices) [tcl3dVector GLuint 1]
glGenBuffers 1 $g_Demo(indices)
glBindBuffer GL_ELEMENT_ARRAY_BUFFER [$g_Demo(indices) get 0]
glBufferData GL_ELEMENT_ARRAY_BUFFER $indicesVecSize $indicesVec GL_STATIC_DRAW
# Read images and use them as a cubemap.
set g_Demo(cubemap) [tcl3dVector GLuint 1]
glGenTextures 1 $g_Demo(cubemap)
glBindTexture GL_TEXTURE_CUBE_MAP [$g_Demo(cubemap) get 0]
set img [tcl3dReadImg [file join $g_Demo(scriptDir) "water_pos_x.tga"]]
glTexImage2D GL_TEXTURE_CUBE_MAP_POSITIVE_X 0 [dict get $img format] \
[dict get $img width] [dict get $img height] 0 \
[dict get $img format] GL_UNSIGNED_BYTE [dict get $img data]
[dict get $img data] delete
set img [tcl3dReadImg [file join $g_Demo(scriptDir) "water_neg_x.tga"]]
glTexImage2D GL_TEXTURE_CUBE_MAP_NEGATIVE_X 0 [dict get $img format] \
[dict get $img width] [dict get $img height] 0 \
[dict get $img format] GL_UNSIGNED_BYTE [dict get $img data]
[dict get $img data] delete
set img [tcl3dReadImg [file join $g_Demo(scriptDir) "water_pos_y.tga"]]
glTexImage2D GL_TEXTURE_CUBE_MAP_POSITIVE_Y 0 [dict get $img format] \
[dict get $img width] [dict get $img height] 0 \
[dict get $img format] GL_UNSIGNED_BYTE [dict get $img data]
[dict get $img data] delete
set img [tcl3dReadImg [file join $g_Demo(scriptDir) "water_neg_y.tga"]]
glTexImage2D GL_TEXTURE_CUBE_MAP_NEGATIVE_Y 0 [dict get $img format] \
[dict get $img width] [dict get $img height] 0 \
[dict get $img format] GL_UNSIGNED_BYTE [dict get $img data]
[dict get $img data] delete
set img [tcl3dReadImg [file join $g_Demo(scriptDir) "water_pos_z.tga"]]
glTexImage2D GL_TEXTURE_CUBE_MAP_POSITIVE_Z 0 [dict get $img format] \
[dict get $img width] [dict get $img height] 0 \
[dict get $img format] GL_UNSIGNED_BYTE [dict get $img data]
[dict get $img data] delete
set img [tcl3dReadImg [file join $g_Demo(scriptDir) "water_neg_z.tga"]]
glTexImage2D GL_TEXTURE_CUBE_MAP_NEGATIVE_Z 0 [dict get $img format] \
[dict get $img width] [dict get $img height] 0 \
[dict get $img format] GL_UNSIGNED_BYTE [dict get $img data]
[dict get $img data] delete
glTexParameteri GL_TEXTURE_CUBE_MAP GL_TEXTURE_MIN_FILTER $::GL_LINEAR
glTexParameteri GL_TEXTURE_CUBE_MAP GL_TEXTURE_MAG_FILTER $::GL_LINEAR
glTexParameteri GL_TEXTURE_CUBE_MAP GL_TEXTURE_WRAP_S $::GL_CLAMP_TO_EDGE
glTexParameteri GL_TEXTURE_CUBE_MAP GL_TEXTURE_WRAP_T $::GL_CLAMP_TO_EDGE
glBindTexture GL_TEXTURE_CUBE_MAP 0
glUseProgram $program
glUniform1f $g_Demo(waterPlaneLengthLocation) $g_Demo(WaterPlaneLen)
glVertexAttribPointer $g_Demo(vertexLocation) 4 GL_FLOAT GL_FALSE 0 "NULL"
glEnableVertexAttribArray $g_Demo(vertexLocation)
glActiveTexture GL_TEXTURE0
glBindTexture GL_TEXTURE_CUBE_MAP [$g_Demo(cubemap) get 0]
glUniform1i $g_Demo(cubemapLocation) 0
set waterTexture [InitTexture $g_Demo(WaterPlaneLen)]
glUseProgram $program
glActiveTexture GL_TEXTURE1
glBindTexture GL_TEXTURE_2D $waterTexture
glUniform1i $g_Demo(waterLocation) 1
# Load the source of the vertex shader.
set vertexSource [tcl3dOglReadShaderFile [file join $g_Demo(scriptDir) "VertexBackground.vs"]]
# Load the source of the fragment shader.
set fragmentSource [tcl3dOglReadShaderFile [file join $g_Demo(scriptDir) "FragmentBackground.fs"]]
set g_ProgramBackground [tcl3dOglBuildProgram $vertexSource "" "" "" $fragmentSource]
set programBackground [dict get $g_ProgramBackground program]
set g_Demo(vaoBackground) [tcl3dVector GLuint 1]
glGenVertexArrays 1 $g_Demo(vaoBackground)
glBindVertexArray [$g_Demo(vaoBackground) get 0]
set sphere [glusCreateSphere [expr {$g_Demo(WaterPlaneLen)*0.5 + 0.5}] 32]
set g_Demo(numIndicesBackground) [dict get $sphere numIndices]
set g_Demo(projectionLocationBackground) [glGetUniformLocation $programBackground "projectionMatrix"]
set g_Demo(modelViewLocationBackground) [glGetUniformLocation $programBackground "modelViewMatrix"]
set g_Demo(cubemapLocationBackground) [glGetUniformLocation $programBackground "cubemap"]
set g_Demo(vertexLocationBackground) [glGetAttribLocation $programBackground "vertex"]
set g_Demo(verticesBackground) [tcl3dVector GLuint 1]
glGenBuffers 1 $g_Demo(verticesBackground)
glBindBuffer GL_ARRAY_BUFFER [$g_Demo(verticesBackground) get 0]
set vertexVec [dict get $sphere vertexVec]
glBufferData GL_ARRAY_BUFFER \
[expr [dict get $sphere numVertices]*4*[$vertexVec elemsize]] \
$vertexVec GL_STATIC_DRAW
set g_Demo(normalsBackground) [tcl3dVector GLuint 1]
glGenBuffers 1 $g_Demo(normalsBackground)
glBindBuffer GL_ARRAY_BUFFER [$g_Demo(normalsBackground) get 0]
set normalVec [dict get $sphere normalVec]
glBufferData GL_ARRAY_BUFFER \
[expr [dict get $sphere numVertices]*3*[$normalVec elemsize]] \
$normalVec GL_STATIC_DRAW
set g_Demo(indicesBackground) [tcl3dVector GLuint 1]
glGenBuffers 1 $g_Demo(indicesBackground)
glBindBuffer GL_ELEMENT_ARRAY_BUFFER [$g_Demo(indicesBackground) get 0]
set indexVec [dict get $sphere indexVec]
glBufferData GL_ELEMENT_ARRAY_BUFFER \
[expr [dict get $sphere numIndices]*[$indexVec elemsize]] \
$indexVec GL_STATIC_DRAW
glusDestroyShape $sphere
glUseProgram $programBackground
set modelViewAsList [tcl3dVectorToList $g_Demo(modelView) 16]
glUniformMatrix4fv $g_Demo(modelViewLocationBackground) 1 GL_FALSE $modelViewAsList
glBindBuffer GL_ARRAY_BUFFER [$g_Demo(verticesBackground) get 0]
glVertexAttribPointer $g_Demo(vertexLocationBackground) 4 GL_FLOAT GL_FALSE 0 "NULL"
glEnableVertexAttribArray $g_Demo(vertexLocationBackground)
glBindBuffer GL_ARRAY_BUFFER [$g_Demo(normalsBackground) get 0]
glUniform1i $g_Demo(cubemapLocationBackground) 0
}
proc CreateCallback { toglwin } {
glClearColor 0.0 0.0 0.0 0.0
glClearDepth 1.0
glEnable GL_DEPTH_TEST
}
proc ReshapeTexture { w h } {
global g_Demo g_ProgramTexture
glBindFramebuffer GL_FRAMEBUFFER [$g_Demo(fboTexture) get 0]
# Calculate the projection matrix and set it
tcl3dOrtho [expr {-$g_Demo(TexSize)*0.5}] [expr {$g_Demo(TexSize)*0.5}] \
[expr {-$g_Demo(TexSize)*0.5}] [expr {$g_Demo(TexSize)*0.5}] \
1.0 100.0 $g_Demo(projectionTexture)
glUseProgram [dict get $g_ProgramTexture program]
set projectionAsList [tcl3dVectorToList $g_Demo(projectionTexture) 16]
glUniformMatrix4fv $g_Demo(projectionLocationTexture) 1 GL_FALSE $projectionAsList
# Store parent/caller width and height.
set g_Demo(parentWidth) $w
set g_Demo(parentHeight) $h
glBindFramebuffer GL_FRAMEBUFFER 0
}
proc ReshapeCallback { toglwin { w -1 } { h -1 } } {
global g_Demo g_Program g_ProgramBackground
set w [$toglwin width]
set h [$toglwin height]
glViewport 0 0 $w $h
if { ! $g_Demo(haveNeededVersion) } {
return
}
# Calculate the projection matrix and set it
tcl3dPerspective 40.0 [expr {double($w)/double($h) }] \
1.0 1000.0 $g_Demo(projection)
set projectionAsList [tcl3dVectorToList $g_Demo(projection) 16]
glUseProgram [dict get $g_ProgramBackground program]
glUniformMatrix4fv $g_Demo(projectionLocationBackground) 1 GL_FALSE $projectionAsList
glUseProgram [dict get $g_Program program]
glUniformMatrix4fv $g_Demo(projectionLocation) 1 GL_FALSE $projectionAsList
ReshapeTexture $w $h
}
proc RenderTexture { passedTime } {
global g_Demo g_ProgramTexture g_Program g_Wave
glViewport 0 0 $g_Demo(TexSize) $g_Demo(TexSize)
glBindFramebuffer GL_FRAMEBUFFER [$g_Demo(fboTexture) get 0]
glClear [expr $::GL_COLOR_BUFFER_BIT | $::GL_DEPTH_BUFFER_BIT]
glUseProgram [dict get $g_ProgramTexture program]
glUniform1f $g_Demo(passedTimeLocationTexture) $passedTime
glUniform4fv $g_Demo(waveParametersLocationTexture) [expr {4*$g_Demo(NumWaves)}] $g_Wave(tex,params)
glUniform2fv $g_Demo(waveDirectionsLocationTexture) [expr {2*$g_Demo(NumWaves)}] $g_Wave(tex,dirs)
glBindVertexArray [$g_Demo(vaoTexture) get 0]
glDrawElements GL_TRIANGLES $g_Demo(numIndicesTexture) GL_UNSIGNED_INT "NULL"
glBindFramebuffer GL_FRAMEBUFFER 0
glViewport 0 0 $g_Demo(parentWidth) $g_Demo(parentHeight)
}
proc RenderWater { passedTime angle } {
global g_Demo g_Program g_Wave
# Calculate the model/view matrix.
tcl3dLookAt 0.0 1.0 0.0 \
[expr {0.5 * sin($g_Demo(angle)) }] 1.0 [expr {-0.5 * cos($g_Demo(angle)) }] \
0.0 1.0 0.0 \
$g_Demo(modelView)
# Copy the original view matrix and inverse it.
tcl3dMatfInvert $g_Demo(modelView) $g_Demo(inverseCamera)
glUseProgram [dict get $g_Program program]
set modelViewAsList [tcl3dVectorToList $g_Demo(modelView) 16]
glUniformMatrix4fv $g_Demo(modelViewLocation) 1 GL_FALSE $modelViewAsList
set inverseCameraAsList [tcl3dVectorToList $g_Demo(inverseCamera) 16]
glUniformMatrix4fv $g_Demo(inverseCameraLocation) 1 GL_FALSE $inverseCameraAsList
glUniform1f $g_Demo(passedTimeLocation) $passedTime
glUniform4fv $g_Demo(waveParametersLocation) [expr {4*$g_Demo(NumWaves)}] $g_Wave(wat,params)
glUniform2fv $g_Demo(waveDirectionsLocation) [expr {2*$g_Demo(NumWaves)}] $g_Wave(wat,dirs)
glBindVertexArray [$g_Demo(vao) get 0]
glPolygonMode GL_FRONT_AND_BACK GL_FILL
glDisable GL_CULL_FACE
glDrawElements GL_TRIANGLE_STRIP [expr {$g_Demo(WaterPlaneLen)*($g_Demo(WaterPlaneLen)-1)*2}] GL_UNSIGNED_INT "NULL"
}
proc DisplayCallback { toglwin } {
global g_Demo g_Program g_ProgramBackground
if { ! $g_Demo(haveNeededVersion) } {
$toglwin swapbuffer
return
}
glClear [expr $::GL_COLOR_BUFFER_BIT | $::GL_DEPTH_BUFFER_BIT]
glUseProgram [dict get $g_ProgramBackground program]
set modelViewAsList [tcl3dVectorToList $g_Demo(modelView) 16]
glUniformMatrix4fv $g_Demo(modelViewLocationBackground) 1 GL_FALSE $modelViewAsList
glBindVertexArray [$g_Demo(vaoBackground) get 0]
glPolygonMode GL_FRONT_AND_BACK GL_FILL
glEnable GL_CULL_FACE
glDrawElements GL_TRIANGLES $g_Demo(numIndicesBackground) GL_UNSIGNED_INT "NULL"
RenderTexture $g_Demo(passedTime)
RenderWater $g_Demo(passedTime) $g_Demo(angle)
set curTime [tcl3dLookupSwatch $g_Demo(stopWatch)]
set elapsedTime [expr $curTime - $g_Demo(lastTime)]
set g_Demo(lastTime) $curTime
set g_Demo(passedTime) [expr { $g_Demo(passedTime) + $elapsedTime }]
set PI2 [expr {2.0 * 3.1415926535897932384626433832795 }]
set g_Demo(angle) [expr { $g_Demo(angle) + $PI2 / 120.0 * $elapsedTime }]
$toglwin swapbuffer
}
proc CleanupTexture {} {
global g_Demo g_Program g_ProgramTexture
if { [info exists g_Demo(verticesTexture)] } {
glDeleteBuffers 1 [$g_Demo(verticesTexture) get 0]
$g_Demo(verticesTexture) delete
}
if { [info exists g_Demo(texCoordsTexture)] } {
glDeleteBuffers 1 [$g_Demo(texCoordsTexture) get 0]
$g_Demo(texCoordsTexture) delete
}
if { [info exists g_Demo(indicesTexture)] } {
glDeleteBuffers 1 [$g_Demo(indicesTexture) get 0]
$g_Demo(indicesTexture) delete
}
if { [info exists g_Demo(textureTexture)] } {
glDeleteTextures 1 [$g_Demo(textureTexture) get 0]
$g_Demo(textureTexture) delete
}
if { [info exists g_Demo(vaoTexture)] } {
glDeleteVertexArrays 1 [$g_Demo(vaoTexture) get 0]
$g_Demo(vaoTexture) delete
}
if { [info exists g_ProgramTexture] } {
tcl3dOglDestroyProgram $g_ProgramTexture
}
if { [info exists g_Demo(fboTexture)] } {
glDeleteFramebuffers 1 [$g_Demo(fboTexture) get 0]
$g_Demo(fboTexture) delete
}
if { [info exists g_Demo(depthTexture)] } {
glDeleteRenderbuffers 1 [$g_Demo(depthTexture) get 0]
$g_Demo(depthTexture) delete
}
}
proc Cleanup {} {
global g_Demo g_Program g_ProgramBackground
if { [info exists g_Demo(vertices)] } {
glDeleteBuffers 1 [$g_Demo(vertices) get 0]
$g_Demo(vertices) delete
}
if { [info exists g_Demo(normals)] } {
glDeleteBuffers 1 [$g_Demo(normals) get 0]
$g_Demo(normals) delete
}
if { [info exists g_Demo(indices)] } {
glDeleteBuffers 1 [$g_Demo(indices) get 0]
$g_Demo(indices) delete
}
if { [info exists g_Demo(cubemap)] } {
glDeleteTextures 1 [$g_Demo(cubemap) get 0]
$g_Demo(cubemap) delete
}
if { [info exists g_Demo(vao)] } {
glDeleteVertexArrays 1 [$g_Demo(vao) get 0]
$g_Demo(vao) delete
}
if { [info exists g_Program] } {
tcl3dOglDestroyProgram $g_Program
}
if { [info exists g_Demo(verticesBackground)] } {
glDeleteBuffers 1 [$g_Demo(verticesBackground) get 0]
$g_Demo(verticesBackground) delete
}
if { [info exists g_Demo(normalsBackground)] } {
glDeleteBuffers 1 [$g_Demo(normalsBackground) get 0]
$g_Demo(normalsBackground) delete
}
if { [info exists g_Demo(indicesBackground)] } {
glDeleteBuffers 1 [$g_Demo(indicesBackground) get 0]
$g_Demo(indicesBackground) delete
}
if { [info exists g_Demo(vaoBackground)] } {
glDeleteVertexArrays 1 [$g_Demo(vaoBackground) get 0]
$g_Demo(vaoBackground) delete
}
if { [info exists g_Program] } {
tcl3dOglDestroyProgram $g_ProgramBackground
}
CleanupTexture
$g_Demo(projection) delete
$g_Demo(projectionTexture) delete
$g_Demo(modelView) delete
$g_Demo(modelViewTexture) delete
tcl3dDeleteSwatch $g_Demo(stopWatch)
# Unset all global variables.
# Needed when running the demo in the Tcl3D presentation framework.
foreach var [info globals g_*] {
uplevel #0 unset $var
}
}
# Put all exit related code here.
proc ExitProg {} {
exit
}
# Create the OpenGL window and some Tk helper widgets.
proc CreateWindow {} {
global g_Demo
frame .fr
pack .fr -expand 1 -fill both
# Create a Togl window with an OpenGL core profile using version 3.3.
# Reshape and Display callbacks are configured later after knowing if
# the needed OpenGL profile version is available.
togl .fr.toglwin -width $g_Demo(winWidth) -height $g_Demo(winHeight) \
-double true -depth true -alpha true \
-createcommand CreateCallback \
-coreprofile true -major 4 -minor 1
set g_Demo(haveNeededVersion) true
set numRows 2
set haveGL4 [tcl3dOglHaveVersion 4]
if { ! $haveGL4 } {
set msgStr [format \
"Demo needs core profile 4.1. Only have GL version %s" \
[tcl3dOglGetVersion]]
set g_Demo(haveNeededVersion) false
incr numRows
} else {
set profile [tcl3dOglGetProfile .fr.toglwin]
if { [dict get $profile "coreprofile"] != true } {
set msgStr [format \
"Demo needs core profile 4.1. Only have compatibility profile %d.%d" \
[dict get $profile "major"] \
[dict get $profile "minor"]]
incr numRows
}
}
if { $g_Demo(haveNeededVersion) } {
# If OpenGL 4.1 or higher is available, initialize the buffers.
Init
}
# Now attach the Reshape and Display callbacks to the Togl window.
.fr.toglwin configure \
-reshapecommand ReshapeCallback \
-displaycommand DisplayCallback
listbox .fr.usage -font $g_Demo(listFont) -height $numRows
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: Nopper's core profile tutorials (Example 14 - Water)"
# Watch for Esc key and Quit messages
wm protocol . WM_DELETE_WINDOW "ExitProg"
bind . <Key-Escape> "ExitProg"
bind .fr.toglwin <1> "StartAnimation"
bind .fr.toglwin <2> "StopAnimation"
bind .fr.toglwin <3> "StopAnimation"
bind .fr.toglwin <Control-Button-1> "StopAnimation"
.fr.usage insert end "Key-Escape Exit"
.fr.usage insert end "Mouse-L|MR Start|Stop animation"
if { [info exists msgStr] } {
.fr.usage insert end $msgStr
.fr.usage itemconfigure end -background red
} else {
.fr.usage configure -state disabled
}
}
CreateWindow
ReshapeCallback .fr.toglwin
PrintInfo [tcl3dOglGetInfoString]
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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