//Perform per frame updates
void UpdateFrame()
{
window.Update();
camera.Update();
//Change object type
if(window.isKeyPressed(' '))
{
++objectType;
if(objectType==3)
objectType=0;
window.SetKeyReleased(' ');
}
//Change render path
if(window.isKeyPressed('1') && renderPath!=CHROMATIC_SINGLE && pathOneSupported)
{
renderPath=CHROMATIC_SINGLE;
InitChromaticSingleStates();
}
if(window.isKeyPressed('2') && renderPath!=SIMPLE_SINGLE)
{
renderPath=SIMPLE_SINGLE;
InitSimpleSingleStates();
}
if(window.isKeyPressed('3') && renderPath!=CHROMATIC_TWIN)
{
renderPath=CHROMATIC_TWIN;
//Set States every pass, as it is a 2 pass algorithm
}
}
//Set up variables
bool DemoInit()
{
if(!window.Init("Project Template", 640, 480, 32, 24, 8, WINDOWED_SCREEN))
return 0; //quit if not created
SetUpARB_multitexture();
SetUpEXT_texture3D();
SetUpEXT_texture_edge_clamp();
SetUpNV_register_combiners();
SetUpNV_texture_shader();
SetUpNV_vertex_program();
if( !EXT_texture_edge_clamp_supported || !ARB_multitexture_supported ||
!NV_vertex_program_supported || !NV_register_combiners_supported)
return false;
//Check we have at least 3 texture units
GLint maxTextureUnitsARB;
glGetIntegerv(GL_MAX_TEXTURE_UNITS_ARB, &maxTextureUnitsARB);
if(maxTextureUnitsARB<3)
{
errorLog.OutputError("I require at least 3 texture units");
return false;
}
//Set light colors
lightColors[0].Set(1.0f, 1.0f, 1.0f, 1.0f);
lightColors[1].Set((float)47/255, (float)206/255, (float)240/255, 1.0f);
lightColors[2].Set((float)254/255, (float)48/255, (float)18/255, 1.0f);
lightColors[3].Set((float)83/255, (float)243/255, (float)29/255, 1.0f);
//Load textures
//Decal image
decalImage.Load("decal.tga");
glGenTextures(1, &decalTexture);
glBindTexture(GL_TEXTURE_2D, decalTexture);
glTexImage2D( GL_TEXTURE_2D, 0, GL_RGBA8, decalImage.width, decalImage.height,
0, decalImage.format, GL_UNSIGNED_BYTE, decalImage.data);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
//Create light textures
if(!InitLightTextures( atten1DTexture, atten2DTexture, atten3DTexture,
gaussian1DTexture, gaussian2DTexture))
return false;
camera.Init(VECTOR3D(0.0f, 0.0f, 3.5f));
//reset timer for start
timer.Reset();
return true;
}
//Perform per frame updates
void UpdateFrame()
{
window.Update();
camera.Update();
//Update the light's position
lightPosition+=lightMovement;
//reflect the velocity if necessary
if(lightPosition.x>0.9f || lightPosition.x<-0.9f)
lightMovement.x=-lightMovement.x;
if(lightPosition.y>0.9f || lightPosition.y<-0.9f)
lightMovement.y=-lightMovement.y;
if(lightPosition.z>0.9f || lightPosition.z<-0.9f)
lightMovement.z=-lightMovement.z;
if(window.isKeyPressed('1') && codePath!=TEXTURE_ATTEN)
{
codePath=TEXTURE_ATTEN;
SetTextureAttenStates();
}
if( window.isKeyPressed('2') && codePath!=PASS_THROUGH_ATTEN &&
NV_texture_shader_supported)
{
codePath=PASS_THROUGH_ATTEN;
SetPassThroughAttenStates();
}
if( window.isKeyPressed('3') && codePath!=TEXTURE_3D_ATTEN &&
EXT_texture3D_supported)
{
codePath=TEXTURE_3D_ATTEN;
SetTexture3DAttenStates();
}
if( window.isKeyPressed('4') && codePath!=GAUSSIAN_ATTEN)
{
codePath=GAUSSIAN_ATTEN;
SetGaussianAttenStates();
}
if( window.isKeyPressed(' '))
{
currentLightColor++;
if(currentLightColor==4)
currentLightColor=0;
window.SetKeyReleased(' ');
}
}
//Set up variables
bool DemoInit()
{
if(!window.Init("Render To Texture", 640, 480, 32, 24, 8, WINDOWED_SCREEN))
return 0; //quit if not created
camera.Init(VECTOR3D(0.0f, 0.0f, -2.5f), 2.0f, 100.0f);
//Set up extensions
if( !SetUpWGL_ARB_extensions_string())
return false;
SetUpEXT_texture_filter_anisotropic();
SetUpSGIS_generate_mipmap();
//Get the WGL extensions string
const char * wglExtensions;
wglExtensions=wglGetExtensionsStringARB(window.hDC);
//Set up wgl extensions
if( !SetUpWGL_ARB_pbuffer(wglExtensions) || !SetUpWGL_ARB_pixel_format(wglExtensions) ||
!SetUpWGL_ARB_render_texture(wglExtensions))
return false;
//Init the pbuffer
int pbufferExtraIAttribs[]={WGL_BIND_TO_TEXTURE_RGBA_ARB, true,
0};
int pbufferFlags[]={WGL_TEXTURE_FORMAT_ARB, WGL_TEXTURE_RGBA_ARB,
WGL_TEXTURE_TARGET_ARB, WGL_TEXTURE_2D_ARB,
//request mipmap space if mipmaps are to be used
SGIS_generate_mipmap_supported ? WGL_MIPMAP_TEXTURE_ARB : 0,
SGIS_generate_mipmap_supported ? true : 0,
0};
if(!pbuffer.Init(pbufferSize, pbufferSize, 32, 24, 8, 1, pbufferExtraIAttribs, pbufferFlags))
return false;
//Create the texture object to relate to the pbuffer
glGenTextures(1, &pbufferTexture);
glBindTexture(GL_TEXTURE_2D, pbufferTexture);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
//Use generated mipmaps if supported
if(SGIS_generate_mipmap_supported)
{
glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP_SGIS, true);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
glHint(GL_GENERATE_MIPMAP_HINT_SGIS, GL_NICEST);
useMipmapFilter=true;
}
//Use maximum anisotropy if supported
if(EXT_texture_filter_anisotropic_supported)
{
glGetIntegerv(GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, &maxAnisotropy);
currentAnisotropy=maxAnisotropy;
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_ANISOTROPY_EXT, currentAnisotropy);
}
//Load the decal texture
//Note: This MUST be done when the pbuffer is the current context
pbuffer.MakeCurrent();
IMAGE decalImage;
decalImage.Load("decal.bmp");
glGenTextures(1, &decalTexture);
glBindTexture(GL_TEXTURE_2D, decalTexture);
glTexImage2D( GL_TEXTURE_2D, 0, GL_RGBA8, decalImage.width, decalImage.height,
0, decalImage.format, GL_UNSIGNED_BYTE, decalImage.data);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
//reset timer for start
timer.Reset();
return true;
}
//draw a frame
void RenderFrame()
{
//Draw to pbuffer
pbuffer.MakeCurrent();
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glLoadIdentity(); //reset modelview matrix
gluLookAt( 0.0f, 0.0f, 4.0f,
0.0f, 0.0f, 0.0f,
0.0f, 1.0f, 0.0f);
//Draw scene
if(drawTextured)
{
glBindTexture(GL_TEXTURE_2D, decalTexture);
glEnable(GL_TEXTURE_2D);
glPushMatrix();
glRotatef(timer.GetTime()/20, 0.0f, 1.0f, 0.0f);
glutSolidTeapot(0.8f);
glPopMatrix();
glDisable(GL_TEXTURE_2D);
}
else
{
glPushMatrix();
glRotatef(timer.GetTime()/20, 0.0f, 1.0f, 0.0f);
glRotatef(55.0f, 1.0f, 0.0f, 0.0f);
glutWireTorus(0.3f, 1.0f, 12, 24);
glPopMatrix();
glPushMatrix();
glRotatef(timer.GetTime()/20, 0.0f, 1.0f, 0.0f);
glRotatef(-55.0f, 1.0f, 0.0f, 0.0f);
glutWireTorus(0.3f, 1.0f, 12, 24);
glPopMatrix();
}
//Draw to window
window.MakeCurrent();
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
camera.SetupViewMatrix();
glLoadMatrixf(camera.viewMatrix);
glBindTexture(GL_TEXTURE_2D, pbufferTexture);
//use the pbuffer as the texture
wglBindTexImageARB(pbuffer.hBuffer, WGL_FRONT_LEFT_ARB);
//Draw simple rectangle
glBegin(GL_TRIANGLE_STRIP);
{
glTexCoord2f(0.0f, 0.0f);
glVertex3f(-1.0f, -1.0f, 0.0f);
glTexCoord2f(0.0f, 1.0f);
glVertex3f(-1.0f, 1.0f, 0.0f);
glTexCoord2f(1.0f, 0.0f);
glVertex3f( 1.0f, -1.0f, 0.0f);
glTexCoord2f(1.0f, 1.0f);
glVertex3f( 1.0f, 1.0f, 0.0f);
}
glEnd();
//release the pbuffer for further rendering
wglReleaseTexImageARB(pbuffer.hBuffer, WGL_FRONT_LEFT_ARB);
fpsCounter.Update(); //update frames per second counter
glColor4f(1.0f, 1.0f, 0.0f, 1.0f);
window.StartTextMode();
window.Print(0, 28, "FPS: %.2f", fpsCounter.GetFps()); //print the fps
glColor4f(1.0f, 0.0f, 0.0f, 1.0f);
window.Print(0, 48, "%dx Anisotropy", currentAnisotropy);
glColor4f(0.0f, 1.0f, 0.0f, 1.0f);
window.Print(0, 68, "%s", useMipmapFilter ? "LINEAR_MIPMAP_LINEAR filtering" :
"LINEAR filtering");
window.EndTextMode();
glColor4f(1.0f, 1.0f, 1.0f, 1.0f);
if(window.isKeyPressed(VK_F1))
{
window.SaveScreenshot();
window.SetKeyReleased(VK_F1);
}
window.SwapBuffers(); //swap buffers
//check for any opengl errors
window.CheckGLError();
//quit if necessary
if(window.isKeyPressed(VK_ESCAPE))
PostQuitMessage(0);
}
//Perform per frame updates
void UpdateFrame()
{
window.Update();
camera.Update();
//Change anisotropy level
if( window.isKeyPressed(VK_UP) && EXT_texture_filter_anisotropic_supported &&
currentAnisotropy<maxAnisotropy)
{
window.MakeCurrent();
currentAnisotropy*=2;
glBindTexture(GL_TEXTURE_2D, pbufferTexture);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_ANISOTROPY_EXT, currentAnisotropy);
window.SetKeyReleased(VK_UP);
}
if( window.isKeyPressed(VK_DOWN) && EXT_texture_filter_anisotropic_supported &&
currentAnisotropy>1)
{
window.MakeCurrent();
currentAnisotropy/=2;
glBindTexture(GL_TEXTURE_2D, pbufferTexture);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_ANISOTROPY_EXT, currentAnisotropy);
window.SetKeyReleased(VK_DOWN);
}
//toggle mipmaps
if( window.isKeyPressed('M') && useMipmapFilter==false && SGIS_generate_mipmap_supported)
{
window.MakeCurrent();
glBindTexture(GL_TEXTURE_2D, pbufferTexture);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP_SGIS, true);
useMipmapFilter=true;
}
if( window.isKeyPressed('L') && useMipmapFilter==true && SGIS_generate_mipmap_supported)
{
window.MakeCurrent();
glBindTexture(GL_TEXTURE_2D, pbufferTexture);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP_SGIS, false);
useMipmapFilter=false;
}
//Pause/unpause
if(window.isKeyPressed('P'))
timer.Pause();
if(window.isKeyPressed('U'))
timer.Unpause();
//Swap between scenes in the pbuffer
if(window.isKeyPressed('1') && drawTextured)
{
//Draw wire tori
drawTextured=false;
}
if(window.isKeyPressed('2') && !drawTextured)
{
//draw textured sphere
drawTextured=true;
}
}
//Set up variables
bool DemoInit()
{
if(!window.Init("Project Template", 640, 480, 32, 24, 8, WINDOWED_SCREEN))
return 0; //quit if not created
SetUpARB_multitexture();
SetUpARB_texture_cube_map();
SetUpEXT_texture_edge_clamp();
SetUpNV_register_combiners();
SetUpNV_register_combiners2();
SetUpNV_vertex_program();
//Check for necessary extensions
if( !ARB_multitexture_supported || !ARB_texture_cube_map_supported ||
!EXT_texture_edge_clamp_supported || !NV_register_combiners_supported ||
!NV_vertex_program_supported)
return false;
//Check for single-pass chromatic aberration states
GLint maxTextureUnits;
glGetIntegerv(GL_MAX_TEXTURE_UNITS_ARB, &maxTextureUnits);
if( NV_register_combiners2_supported && maxTextureUnits>=4)
{
errorLog.OutputSuccess("Single Pass Chromatic Aberration Supported!");
pathOneSupported=true;
renderPath=CHROMATIC_SINGLE;
}
camera.Init(VECTOR3D(0.0f, 0.0f, 4.0f), 2.5f, 10.0f);
if( !cubeMapPosX.Load("cube_face_posx.tga") ||
!cubeMapNegX.Load("cube_face_negx.tga") ||
!cubeMapPosY.Load("cube_face_posy.tga") ||
!cubeMapNegY.Load("cube_face_negy.tga") ||
!cubeMapPosZ.Load("cube_face_posz.tga") ||
!cubeMapNegZ.Load("cube_face_negz.tga"))
return false;
//Build a texture from the data
glGenTextures(1, &cubeMapTexture); //Generate Texture ID
glBindTexture(GL_TEXTURE_CUBE_MAP_ARB, cubeMapTexture); //Bind texture
glTexImage2D( GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB,
0, GL_RGBA8, cubeMapPosX.width, cubeMapPosX.height, 0,
cubeMapPosX.format, GL_UNSIGNED_BYTE, cubeMapPosX.data);
glTexImage2D( GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB,
0, GL_RGBA8, cubeMapNegX.width, cubeMapNegX.height, 0,
cubeMapNegX.format, GL_UNSIGNED_BYTE, cubeMapNegX.data);
glTexImage2D( GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB,
0, GL_RGBA8, cubeMapPosY.width, cubeMapPosY.height, 0,
cubeMapPosY.format, GL_UNSIGNED_BYTE, cubeMapPosY.data);
glTexImage2D( GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB,
0, GL_RGBA8, cubeMapNegY.width, cubeMapNegY.height, 0,
cubeMapNegY.format, GL_UNSIGNED_BYTE, cubeMapNegY.data);
glTexImage2D( GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB,
0, GL_RGBA8, cubeMapPosZ.width, cubeMapPosZ.height, 0,
cubeMapPosZ.format, GL_UNSIGNED_BYTE, cubeMapPosZ.data);
glTexImage2D( GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB,
0, GL_RGBA8, cubeMapNegZ.width, cubeMapNegZ.height, 0,
cubeMapNegZ.format, GL_UNSIGNED_BYTE, cubeMapNegZ.data);
glTexParameteri(GL_TEXTURE_CUBE_MAP_ARB, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_CUBE_MAP_ARB, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_CUBE_MAP_ARB, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_CUBE_MAP_ARB, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_CUBE_MAP_ARB, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);
//reset timer for start
timer.Reset();
return true;
}
//draw a frame
void RenderFrame()
{
//Clear buffers
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glLoadIdentity(); //reset modelview matrix
camera.SetupViewMatrix();
glMultMatrixf(camera.viewMatrix);
DrawBackground();
glPushAttrib(GL_ALL_ATTRIB_BITS);
//Enable vertex program
glEnable(GL_VERTEX_PROGRAM_NV);
//Enable register combiners
glEnable(GL_REGISTER_COMBINERS_NV);
//Enable textures
glBindTexture(GL_TEXTURE_CUBE_MAP_ARB, cubeMapTexture);
glEnable(GL_TEXTURE_CUBE_MAP_ARB);
glActiveTextureARB(GL_TEXTURE1_ARB);
glBindTexture(GL_TEXTURE_CUBE_MAP_ARB, cubeMapTexture);
glEnable(GL_TEXTURE_CUBE_MAP_ARB);
//Set up CHROMATIC_SINGLE tex units
if(renderPath==CHROMATIC_SINGLE)
{
glActiveTextureARB(GL_TEXTURE2_ARB);
glBindTexture(GL_TEXTURE_CUBE_MAP_ARB, cubeMapTexture);
glEnable(GL_TEXTURE_CUBE_MAP_ARB);
glActiveTextureARB(GL_TEXTURE3_ARB);
glBindTexture(GL_TEXTURE_CUBE_MAP_ARB, cubeMapTexture);
glEnable(GL_TEXTURE_CUBE_MAP_ARB);
}
glActiveTextureARB(GL_TEXTURE0_ARB);
//Set the texture Matrix to be the inverse view matrix
glMatrixMode(GL_TEXTURE);
glLoadIdentity();
glMultMatrixf(camera.viewMatrix.GetInverse());
glMatrixMode(GL_MODELVIEW);
//Create object display lists
static GLuint objectLists;
if(!objectLists)
{
objectLists=glGenLists(3);
glNewList(objectLists, GL_COMPILE);
{
glutSolidSphere(1.0, 120, 60);
}
glEndList();
glNewList(objectLists+1, GL_COMPILE);
{
glutSolidTorus(0.3, 0.7, 120, 60);
}
glEndList();
glNewList(objectLists+2, GL_COMPILE);
{
glutSolidTeapot(1.0f);
}
glEndList();
}
//If using CHROMATIC_TWIN, need to do two passes, so set states every frame
if(renderPath==CHROMATIC_TWIN)
InitChromaticTwin1States();
//draw object
glCallList(objectLists+objectType);
//Do the second path if necessary
if(renderPath==CHROMATIC_TWIN)
{
InitChromaticTwin2States();
glCallList(objectLists+objectType);
}
//Reset texture matrix
glMatrixMode(GL_TEXTURE);
glLoadIdentity();
glMatrixMode(GL_MODELVIEW);
glPopAttrib();
fpsCounter.Update(); //update frames per second counter
glColor4f(1.0f, 1.0f, 0.0f, 1.0f);
window.StartTextMode();
window.Print(0, 28, "FPS: %.2f", fpsCounter.GetFps()); //print the fps
glColor4f(0.5f, 0.0f, 1.0f, 1.0f);
if(renderPath==CHROMATIC_SINGLE)
window.Print(0, 48, "Single Pass Chromatic Aberration");
if(renderPath==SIMPLE_SINGLE)
window.Print(0, 48, "Single Pass Simple Refraction");
if(renderPath==CHROMATIC_TWIN)
window.Print(0, 48, "Two Pass Chromatic Aberration");
window.EndTextMode();
glColor4f(1.0f, 1.0f, 1.0f, 1.0f);
if(window.isKeyPressed(VK_F1))
{
window.SaveScreenshot();
window.SetKeyReleased(VK_F1);
}
window.SwapBuffers(); //swap buffers
//check for any opengl errors
window.CheckGLError();
//quit if necessary
if(window.isKeyPressed(VK_ESCAPE))
PostQuitMessage(0);
}
//draw a frame
void RenderFrame()
{
//Clear buffers
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glLoadIdentity(); //reset modelview matrix
camera.SetupViewMatrix();
glLoadMatrixf(camera.viewMatrix);
//Enable box texture
glEnable(GL_TEXTURE_2D);
//Enable attenuation textures
if(codePath==TEXTURE_ATTEN || codePath==GAUSSIAN_ATTEN)
{
//2D atten
glActiveTextureARB(GL_TEXTURE1_ARB);
glEnable(GL_TEXTURE_2D);
//1D atten
glActiveTextureARB(GL_TEXTURE2_ARB);
glEnable(GL_TEXTURE_1D);
glActiveTextureARB(GL_TEXTURE0_ARB);
}
else if(codePath==PASS_THROUGH_ATTEN) //set up pass through states
{
//enable texture shaders
glEnable(GL_TEXTURE_SHADER_NV);
}
else if(codePath==TEXTURE_3D_ATTEN)
{
//3D atten
glActiveTextureARB(GL_TEXTURE1_ARB);
glEnable(GL_TEXTURE_3D);
glActiveTextureARB(GL_TEXTURE0_ARB);
}
//Enable vertex program
glEnable(GL_VERTEX_PROGRAM_NV);
glBindProgramNV(GL_VERTEX_PROGRAM_NV, vertexProgram);
//Send the light's color to primary color
glColor4fv(lightColors[currentLightColor]);
//set the texture matrix
glMatrixMode(GL_TEXTURE);
glLoadIdentity();
glTranslatef(0.5f, 0.5f, 0.5f);
glScalef(0.5f, 0.5f, 0.5f);
glScalef(1/lightRadius, 1/lightRadius, 1/lightRadius);
glTranslatef(-lightPosition.x, -lightPosition.y, -lightPosition.z);
glMatrixMode(GL_MODELVIEW);
//Enable register combiners
glEnable(GL_REGISTER_COMBINERS_NV);
//Draw Cube
glDrawArrays(GL_QUADS, 0, 24);
//Disable box texture
glDisable(GL_TEXTURE_2D);
//Disable attenuation textures
if(codePath==TEXTURE_ATTEN || codePath==GAUSSIAN_ATTEN)
{
//2D atten
glActiveTextureARB(GL_TEXTURE1_ARB);
glDisable(GL_TEXTURE_2D);
//1D atten
glActiveTextureARB(GL_TEXTURE2_ARB);
glDisable(GL_TEXTURE_1D);
glActiveTextureARB(GL_TEXTURE0_ARB);
}
else if(codePath==PASS_THROUGH_ATTEN) //set up pass through states
{
//disable texture shaders
glDisable(GL_TEXTURE_SHADER_NV);
}
else if(codePath==TEXTURE_3D_ATTEN)
{
//3D atten
glActiveTextureARB(GL_TEXTURE1_ARB);
glDisable(GL_TEXTURE_3D);
glActiveTextureARB(GL_TEXTURE0_ARB);
}
//Disable vertex program
glDisable(GL_VERTEX_PROGRAM_NV);
//reset the texture matrix
glMatrixMode(GL_TEXTURE);
glLoadIdentity();
glMatrixMode(GL_MODELVIEW);
//Disable register combiners
glDisable(GL_REGISTER_COMBINERS_NV);
//Draw light in a display list
glColor4fv(lightColors[currentLightColor]);
glTranslatef(lightPosition.x, lightPosition.y, lightPosition.z);
static GLuint sphereList=0;
if(!sphereList)
{
sphereList=glGenLists(1);
glNewList(sphereList, GL_COMPILE);
{
gluSphere(sphere, 0.1f, 24, 12);
}
glEndList();
}
glCallList(sphereList);
glColor4f(1.0f, 1.0f, 1.0f, 1.0f);
fpsCounter.Update(); //update frames per second counter
glColor4f(0.0f, 0.0f, 1.0f, 1.0f);
window.StartTextMode();
window.Print(0, 28, "FPS: %.2f", fpsCounter.GetFps()); //print the fps
glColor4f(1.0f, 1.0f, 0.0f, 0.0f);
if(codePath==TEXTURE_ATTEN)
window.Print(0, 48, "Using Texture Attenuation");
if(codePath==PASS_THROUGH_ATTEN)
window.Print(0, 48, "Using Pass Through Attenuation");
if(codePath==TEXTURE_3D_ATTEN)
window.Print(0, 48, "Using 3D Texture Attenuation");
if(codePath==GAUSSIAN_ATTEN)
window.Print(0, 48, "Using Gaussian Texture Attenuation");
window.EndTextMode();
glColor4f(1.0f, 1.0f, 1.0f, 1.0f);
if(window.isKeyPressed(VK_F1))
{
window.SaveScreenshot();
window.SetKeyReleased(VK_F1);
}
window.SwapBuffers(); //swap buffers
//check for any opengl errors
window.CheckGLError();
//quit if necessary
if(window.isKeyPressed(VK_ESCAPE))
PostQuitMessage(0);
}
