#include <OpenGL/gl.h>  // pour MacOSX
#include <OpenGL/glu.h> // pour MacOSX
#include <GLUT/glut.h>  // pour MacOSX

// #include "glut.h"    // pour PC

/*
Compilation sur MacOSX :
gcc -framework OpenGL -framework GLUT -framework Cocoa -o carre carre.c

Compilation sur PC :
gcc carre.c -o carre -L/usr/X11R6/include/GL -L/usr/X11R6/lib -lGL -lGLU -lglut -lm -lX11

22/04/04 - Didier STRAUS - Info. graphique - Carre en OpenGL
http://www.Software-DS.com
*/

/* prototypes */
void affichage();
void clavier(unsigned char touche,int x,int y);


/* main */
int main(int argc,char **argv) {
glutInit(&argc,argv);
glutInitDisplayMode(GLUT_RGB);
glutInitWindowPosition(200,200);
glutInitWindowSize(500,500);
glutCreateWindow("Open GL - DS");

glClearColor(0,0,0,0);
glColor3f(1,1,1);
glPointSize(2);

glutDisplayFunc(affichage);
glutKeyboardFunc(clavier);

glutMainLoop();
return 0;
} /* main */

/* ********************************************************* */

void affichage() {
glClear(GL_COLOR_BUFFER_BIT);

// dessin
glBegin(GL_POLYGON);
glColor3f(1,0,0);
glVertex2f(-0.5,-0.5);

glColor3f(0,1,0);
glVertex2f(0.5,-0.5);

glColor3f(0,0,1);
glVertex2f(0.5,0.5);

glColor3f(1,1,1);
glVertex2f(-0.5,0.5);
glEnd();

glFlush();
} /* affichage */

/* ********************************************************* */

void clavier(unsigned char touche,int x,int y) {
switch(touche) {
case 'p':
 glPolygonMode(GL_FRONT_AND_BACK,GL_FILL);
 glutPostRedisplay();
 break;

case 'f':
 glPolygonMode(GL_FRONT_AND_BACK,GL_LINE);
 glutPostRedisplay();
 break;

case 's':
 glPolygonMode(GL_FRONT_AND_BACK,GL_POINT);
 glutPostRedisplay();
 break;

case 'q':
 exit(0);
}

} /* clavier */