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| #include <iostream>
#include <cstdlib>
#include <GL/glew.h>
#include <SFML/Window.hpp>
sf::Window App;
// Un quadric
GLUquadric * sphere = NULL;
// Identifiants
GLuint framebuffer, texture1, depth, depthbuffer;
void InitOGL ()
{
glewInit ();
// Set color and depth clear value
glClearDepth(1.f);
glClearColor(0.f, 0.f, 0.3f, 1.f);
// Enable Z-buffer read and write
glEnable(GL_DEPTH_TEST);
glDepthMask(GL_TRUE);
// Setup a perspective projection
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glViewport (0, 0, 512, 512); // On règle le Viewport
glMatrixMode (GL_PROJECTION);
glLoadIdentity ();
gluPerspective (60.0, 512.0 / 512.0, 1.0, 20.0);
glMatrixMode (GL_MODELVIEW);
glLoadIdentity (); // On rétablit la matrice identité
// Création du quadric
sphere = gluNewQuadric ();
glGenFramebuffersEXT(1, &framebuffer);
glGenTextures(1, &texture1);
glBindTexture(GL_TEXTURE_2D, texture1);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_DEPTH_TEXTURE_MODE, GL_INTENSITY);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_MODE, GL_NONE);
//glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_FUNC, GL_LEQUAL);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT, 512, 512, 0, GL_DEPTH_COMPONENT, GL_FLOAT, NULL);
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, framebuffer);
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_TEXTURE_2D, texture1, 0);
glDrawBuffer(GL_NONE);
glReadBuffer(GL_NONE);
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
}
void Destroy ()
{
gluDeleteQuadric (sphere);
glDeleteFramebuffersEXT (1, &framebuffer);
glDeleteRenderbuffersEXT (1, &depth);
glDeleteTextures (1, &texture1);
}
void RenderScene ()
{
// On dessine un sol
glBegin (GL_QUADS);
glNormal3f (0.0f, 1.0f, 0.0f);
glVertex3f (-5.0f, 0.0f, 5.0f);
glVertex3f (-5.0f, 0.0f, -5.0f);
glVertex3f (5.0f, 0.0f, -5.0f);
glVertex3f (5.0f, 0.0f, 5.0f);
glEnd ();
// Et une sphère
glTranslatef (0.0f, 5.0f, 0.0f);
gluSphere (sphere, 2.0f, 20, 20);
}
void DrawQuad ()
{
// On utilise une perception 2D
glMatrixMode (GL_PROJECTION);
glPushMatrix ();
glLoadIdentity ();
gluOrtho2D (0.0, 512.0, 0.0, 512.0);
glMatrixMode (GL_MODELVIEW);
glPushMatrix ();
glLoadIdentity ();
glColor3f (1.0f, 1.0f, 1.0f);
glBegin (GL_QUADS);
glTexCoord2f (0.0f, 0.0f);
glVertex2f (0.0f, 0.0f);
glTexCoord2f (1.0f, 0.0f);
glVertex2f (512.0f, 0.0f);
glTexCoord2f (1.0f, 1.0f);
glVertex2f (512.0f, 512.0f);
glTexCoord2f (0.0f, 1.0f);
glVertex2f (0.0f, 512.0f);
glEnd ();
glPopMatrix ();
glMatrixMode (GL_PROJECTION);
glPopMatrix ();
}
void Render ()
{
glLoadIdentity ();
gluLookAt (0.0f, 0.0f, 10.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f);
glRotatef (20.0f, 1.0f, 0.0f, 0.0f);
// On rend la scène dans le framebuffer
glBindFramebufferEXT (GL_FRAMEBUFFER_EXT, framebuffer);
glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
RenderScene();
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// Puis on dessine la texture
glEnable (GL_TEXTURE_2D);
glBindTexture (GL_TEXTURE_2D, texture1);
DrawQuad ();
glBindTexture (GL_TEXTURE_2D, 0);
glDisable (GL_TEXTURE_2D);
}
int main()
{
// Create the main window
App.Create(sf::VideoMode(512, 512, 32), "SFML OpenGL");
// Create a clock for measuring time elapsed
sf::Clock Clock;
InitOGL ();
// Start game loop
bool Running = true;
while (Running)
{
// Process events
sf::Event Event;
while (App.GetEvent(Event))
{
// Close window : exit
if (Event.Type == sf::Event::Closed)
Running = false;
// Escape key : exit
if ((Event.Type == sf::Event::KeyPressed) && (Event.Key.Code == sf::Key::Escape))
Running = false;
// Resize event : adjust viewport
if (Event.Type == sf::Event::Resized)
glViewport(0, 0, Event.Size.Width, Event.Size.Height);
}
// Set the active window before using OpenGL commands
// It's useless here because active window is always the same,
// but don't forget it if you use multiple windows or controls
App.SetCurrent();
Render ();
// Finally, display rendered frame on screen
App.Display();
}
Destroy ();
return EXIT_SUCCESS;
} |
ombre avec fbo ( opengl )
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Envoyé par Harooold
. Mais quel con je fais !!! Je pensais pourtant que j'avais bien remis la matrice modelview en sortant de DrawQuad, et en fait non, je restait sur la matrice de projection... MERCI BEAUCOUP !!
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