Un carré au milieu d'une fenêtre noire.
La touche espace permet de changer sa couleur.
La touche escape permet de quitter le programme.

L'exécutable: GLUTKeyboard.exe

Le source: GLUTKeyboard.cpp

#include <windows.h>

#include <GL/gl.h>
#include <GL/glut.h>

int c = 0 ;

void key(unsigned char key,int x,int y) {
  switch(key) {
    case 27  : exit(0); 
               break;
    case ' ' : c = (c+1)%7; 
               glutPostRedisplay();
               break; }
}

void display(void) {
  glClearColor(0.0F,0.0F,0.0F,0.0F) ;
  glClear(GL_COLOR_BUFFER_BIT) ;
  glOrtho(-1.0,1.0,-1.0,1.0,
          -1.0,1.0);
  switch(c) {
    case 0 : glColor3f(1.0F,1.0F,1.0F) ;
             break ;
    case 1 : glColor3f(1.0F,1.0F,0.0F) ;
             break ;
    case 2 : glColor3f(1.0F,0.0F,1.0F) ;
             break ;
    case 3 : glColor3f(0.0F,1.0F,1.0F) ;
             break ;
    case 4 : glColor3f(0.0F,1.0F,0.0F) ;
             break ;
    case 5 : glColor3f(0.0F,0.0F,1.0F) ;
             break ;
    case 6 : glColor3f(1.0F,0.0F,0.0F) ;
             break ; }
  glBegin(GL_POLYGON) ;
  glVertex2f(-0.5F,-0.5F) ;
  glVertex2f(-0.5F,0.5F) ;
  glVertex2f(0.5F,0.5F) ;
  glVertex2f(0.5F,-0.5F) ;
  glEnd() ;
  glFlush() ;
}

void main(int argc,char **argv) {
  glutInit(&argc,argv);
  glutInitWindowSize(200,200);
  glutInitWindowPosition(100,100);
  glutInitDisplayMode(GLUT_RGBA|GLUT_SINGLE);
  glutCreateWindow("Carre de couleur") ;
  glutDisplayFunc(display) ;
  glutKeyboardFunc(key) ;
  glutMainLoop() ;
}

 RETOUR