/* Auteur: Nicolas JANEY                  */
/* Avril 2001                             */
/* Dessin OpenGL d'une courbe de Bezier   */

#include <windows.h>

#include <GL/gl.h>
#include <GL/glu.h>
#include <GL/glaux.h>

GLfloat points[4][3] = { 
  {-4.0,-4.0,0.0},{-2.0,4.0,0.0}, 
  { 2.0,-4.0,0.0},{ 4.0,4.0,0.0}}; 
  
void CALLBACK display(void) { 
  int i; 
  glClear(GL_COLOR_BUFFER_BIT); 
  glColor3f(1.0,1.0,1.0); 
  glBegin(GL_LINE_STRIP); 
  for( i = 0 ; i <= 30 ; i++ ) 
    glEvalCoord1f((GLfloat) i/30.0F); 
  glEnd(); 
  glPointSize(5.0); 
  glColor3f(1.0,1.0,0.0); 
  glBegin(GL_POINTS); 
  for( i = 0 ; i < 4 ; i++ ) 
    glVertex3fv(&points[i][0]); 
  glEnd(); 
  glFlush(); 
} 
  
void CALLBACK myReshape(int w,int h) { 
  glViewport(0,0,w,h); 
  glMatrixMode(GL_PROJECTION); 
  glLoadIdentity(); 
  if( w <= h ) 
    glOrtho(-5.,5.,-5.*(float)h/(float)w,5.*(float)h/(float)w,-5.,5.); 
    else 
    glOrtho(-5.*(float)w/(float)h,5.*(float)w/(float)h,-5.,5.,-5.,5.); 
  glMatrixMode(GL_MODELVIEW); 
  glLoadIdentity(); 
} 
  
void myinit(void) { 
  glClearColor(0.0,0.0,0.0,1.0); 
  glMap1f(GL_MAP1_VERTEX_3,0.0,1.0,3,4,&points[0][0]); 
  glEnable(GL_MAP1_VERTEX_3); 
  glShadeModel(GL_FLAT); 
} 
  
void main(void) { 
  auxInitDisplayMode(AUX_SINGLE|AUX_RGB); 
  auxInitPosition(0,0,250,250); 
  auxInitWindow("Courbe de Bezier"); 
  myinit(); 
  auxReshapeFunc(myReshape); 
  auxMainLoop(display); 
}