//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()
{
//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);
}
//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);
}