Hi :)
i'm a total noob programming FBO's and i'm trying to render a 3D scene using it. The scene, containing a ground, a torus and some spheres, has lighting and material properties.
This is how the scene should be rendered,
HERE
And after using FBO this is the result,
HERE
So i suppose i'm doing something wrong about the lights while rendering. If someone could briefly check my code maybe you can say what's my critical error... i tried everything discover and had no results till now :S
// Function SetupRC
void SetupRC()
{
int iSphere;
// Grayish background
glClearColor(fLowLight[0], fLowLight[1], fLowLight[2], fLowLight[3]);
// Cull backs of polygons
glCullFace(GL_BACK);
glFrontFace(GL_CCW);
glEnable(GL_CULL_FACE);
glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
glEnable(GL_DEPTH_TEST);
glEnable(GL_TEXTURE_2D);
// Setup light parameters
glLightModelfv(GL_LIGHT_MODEL_AMBIENT, fNoLight);
glLightfv(GL_LIGHT0, GL_AMBIENT, fLowLight);
glLightfv(GL_LIGHT0, GL_DIFFUSE, fBrightLight);
glLightfv(GL_LIGHT0, GL_SPECULAR, fBrightLight);
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
//code removed...
}
// Function InitFBO
void InitFBO(struct FBO *fbo, int width, int height)
{
int i;
GLenum status;
GLuint attachment;
glGenFramebuffersEXT(1, &(fbo->frame));
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fbo->frame);
glGenRenderbuffersEXT(1, &(fbo->depth));
glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, fbo->depth);
glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_DEPTH_COMPONENT24, width, height);
glGenTextures(2, fbo->texid);
for(i=0; i <2; i++){
if (i == 0)
attachment = GL_COLOR_ATTACHMENT0_EXT;
else
attachment = GL_COLOR_ATTACHMENT1_EXT;
glBindTexture(GL_TEXTURE_2D, fbo->texid);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, WIN_WIDTH, WIN_HEIGHT, 0, GL_RGB, GL_FLOAT, NULL);
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_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, attachment, GL_TEXTURE_2D, fbo->texid, 0);
}
glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, fbo->depth);
//code removed...
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
}
//Function RenderScene
void RenderScene(void)
{
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fbo_obj.frame);
glPushAttrib(GL_VIEWPORT_BIT);
glViewport(0, 0, WIN_WIDTH, WIN_HEIGHT);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(35.0f, (float)WIN_WIDTH/(float)WIN_HEIGHT, 1.0f, 50.0f);
glMatrixMode(GL_MODELVIEW);
glClearColor(0.0f, 0.0f, 0.0f, 0.5f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glLoadIdentity();
//Drawing scene
glPushMatrix();
// Position light before any other transformations
glLightfv(GL_LIGHT0, GL_POSITION, fLightPos);
glColor3f(0.60f, .40f, .10f);
DrawGround();
// Draw inhabitants normally
DrawInhabitants(0);
glPopMatrix();
glPopAttrib();
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
glClearColor(0.0f, 0.0f, 0.2f, 0.5f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // Clear Screen And Depth Buffer
glLoadIdentity();
glBindTexture(GL_TEXTURE_2D, fbo_obj.texid[0]);
glEnable(GL_TEXTURE_2D);
//Render the texture
glPushMatrix();
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glTranslatef(0.0f,0.0f,-1.0f);
glBegin(GL_QUADS);
glTexCoord2f(0.0f, 0.0f); glVertex2f(-1.0f, -1.0f);
glTexCoord2f(1.0f, 0.0f); glVertex2f(1.0f, -1.0f);
glTexCoord2f(1.0f, 1.0f); glVertex2f(1.0f, 1.0f);
glTexCoord2f(0.0f, 1.0f); glVertex2f(-1.0f, 1.0f);
glEnd();
glPopMatrix();
glDisable(GL_TEXTURE_2D);
glutSwapBuffers();
}
Thanks for your time and help :)
hayden
[Edited by - hayden on December 8, 2008 12:49:58 PM]
