void GBuffer::CreateBuffer() {
GLuint width = glutGet(GLUT_WINDOW_WIDTH);
GLuint height = glutGet(GLUT_WINDOW_HEIGHT);
FBO = CreateFBO();
positionTex = CreateRenderTexture(width, height, GL_RGBA32F, GL_FLOAT);
normalTex = CreateRenderTexture(width, height, GL_RGBA16F, GL_FLOAT);
albedoTex = CreateRenderTexture(width, height, GL_RGBA8, GL_UNSIGNED_BYTE);
depthTex = CreateRenderTexture(width, height, GL_DEPTH_COMPONENT24, GL_UNSIGNED_BYTE);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, positionTex, 0);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT1, GL_TEXTURE_2D, normalTex, 0);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT2, GL_TEXTURE_2D, albedoTex, 0);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, depthTex, 0);
}
/**
* Initializes the render method.
*/
void InitRendering_Slow(unsigned int windowWidth, unsigned int windowHeight)
{
DeinitRendering_Slow();
gWindowWidth = windowWidth;
gWindowHeight = windowHeight;
glGenFramebuffers(1, &gSceneFBO);
glBindFramebuffer(GL_FRAMEBUFFER, gSceneFBO);
// create render target
CreateRenderTexture( gSceneTexture, windowWidth, windowHeight );
// bind render target
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, gSceneTexture, 0);
// create depth buffer
{
glGenRenderbuffers(1, &gDepthBuffer);
glBindRenderbuffer(GL_RENDERBUFFER, gDepthBuffer);
glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT, windowWidth, windowHeight);
glBindRenderbuffer(GL_RENDERBUFFER, 0);
}
// bind depth buffer
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, gDepthBuffer);
glBindFramebuffer(GL_FRAMEBUFFER, 0);
}
void Init(HWND hWnd)
{
g_hWnd = hWnd; // Assign the window handle to a global window handle
GetClientRect(g_hWnd, &g_rRect); // Assign the windows rectangle to a global RECT
InitializeOpenGL(g_rRect.right, g_rRect.bottom); // Init OpenGL with the global rect
/////// * /////////// * /////////// * NEW * /////// * /////////// * /////////// *
// Here we initialize our multi-texturing functions
glActiveTextureARB = (PFNGLACTIVETEXTUREARBPROC) wglGetProcAddress("glActiveTextureARB");
glMultiTexCoord2fARB = (PFNGLMULTITEXCOORD2FARBPROC) wglGetProcAddress("glMultiTexCoord2fARB");
// Make sure our multi-texturing extensions were loaded correctly
if(!glActiveTextureARB || !glMultiTexCoord2fARB)
{
// Print an error message and quit.
MessageBox(g_hWnd, "Your current setup does not support multitexturing", "Error", MB_OK);
PostQuitMessage(0);
}
// Tell OpenGL our light's position
glLightfv( GL_LIGHT0, GL_POSITION, g_LightPosition );
// This turns the background to a dark grey/black.
glClearColor(0.2f, 0.2f, 0.2f, 1.0f);
// Turn on our light and enable color along with the light
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
glEnable(GL_COLOR_MATERIAL);
// Here we allocate memory for our depth texture that will store our light's view.
// We must set the channels and type for the texture as GL_DEPTH_COMPONENT.
CreateRenderTexture(g_Texture, SHADOW_WIDTH, SHADOW_HEIGHT, GL_DEPTH_COMPONENT, GL_DEPTH_COMPONENT, SHADOW_ID);
// Set the camera: Position View Up Vector
g_Camera.PositionCamera(0, 9, 12, 0, 2.5, -2, 0, 1, 0);
/////// * /////////// * /////////// * NEW * /////// * /////////// * /////////// *
}
/**
* Create resize FBO.
*/
static void CreateResizeFBO( int captureWidth, int captureHeight )
{
if ( gResizeFBO != 0 )
{
glDeleteFramebuffers(1, &gResizeFBO);
gResizeFBO = 0;
}
if ( gResizeTexture != 0 )
{
glDeleteTextures(1, &gResizeTexture);
gResizeTexture = 0;
}
glGenFramebuffers(1, &gResizeFBO);
glBindFramebuffer(GL_FRAMEBUFFER, gResizeFBO);
CreateRenderTexture( gResizeTexture, captureWidth, captureHeight );
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, gResizeTexture, 0);
glBindFramebuffer(GL_FRAMEBUFFER, 0);
}
