/* Auteur: Nicolas JANEY                    */
/* nicolas.janey@univ-fcomte.fr             */
/* Avril 2004                               */
/* Comparaison Z-Buffer - Lancer de rayons  */

#include <stdio.h>
#include <stdlib.h>
#include <math.h>

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

#include "ModuleCouleurs.h"
#include "ModuleMenus.h"
#include "ModuleFont.h"
#include "ModuleMatriceVecteurDouble.h"
#include "ModuleManipulateur.h"

#include "LancerDeRayonsFonctions.h"

static int width ;
static int height ;
static int width2 ;
static int height2 ;
static int f1;
static int f2;
static float indice = 1.0F;
materiel c0 = { (couleur *) couleurRouge(),
                (couleur *) couleurNoir(),
                1,(couleur *) couleurGrisMoyen(),
                (couleur *) couleurNoir(),
                1,(couleur *) couleurBlanc(),
                3.0F,1.5F,
                0,0.0F };
materiel c1 = { (couleur *) couleurVert(),
                (couleur *) couleurNoir(),
                1,(couleur *) couleurGrisMoyen(),
                (couleur *) couleurNoir(),
                1,(couleur *) couleurBlanc(),
                3.0F,1.333F,
                0,0.0F };
materiel c2 = { (couleur *) couleurBlanc(),
                (couleur *) couleurNoir(),
                1,(couleur *) couleurGrisMoyen(),
                (couleur *) couleurNoir(),
                1,(couleur *) couleurGrisMoyen(),
                3.0F,1.33F,
                0,0.0F };
materiel c3 = { (couleur *) couleurBleu(),
                (couleur *) couleurNoir(),
                1,(couleur *) couleurGrisMoyen(),
                (couleur *) couleurNoir(),
                1,(couleur *) couleurGrisMoyen(),
                3.0F,1.5F,
                0,0.0F };
materiel c41 = { (couleur *) couleurBlanc(),
                 (couleur *) couleurNoir(),
                 0,(couleur *) couleurNoir(),
                 (couleur *) couleurNoir(),
                 0,(couleur *) couleurNoir(),
                 3.0F,1.0F,
                 0,0.0F };
materiel c42 = { (couleur *) couleurRouge(),
                 (couleur *) couleurNoir(),
                 0,(couleur *) couleurNoir(),
                 (couleur *) couleurNoir(),
                 0,(couleur *) couleurNoir(),
                 3.0F,1.0F,
                 0,0.0F };
materiel c43 = { (couleur *) couleurVert(),
                 (couleur *) couleurNoir(),
                 0,(couleur *) couleurNoir(),
                 (couleur *) couleurNoir(),
                 0,(couleur *) couleurNoir(),
                 3.0F,1.0F,
                 0,0.0F };
materiel c44 = { (couleur *) couleurBleu(),
                 (couleur *) couleurNoir(),
                 0,(couleur *) couleurNoir(),
                 (couleur *) couleurNoir(),
                 0,(couleur *) couleurNoir(),
                 3.0F,1.0F,
                 0,0.0F };
materiel c45 = { (couleur *) couleurMagenta(),
                 (couleur *) couleurNoir(),
                 0,(couleur *) couleurNoir(),
                 (couleur *) couleurNoir(),
                 0,(couleur *) couleurNoir(),
                 3.0F,1.0F,
                 0,0.0F };
materiel c5 = { (couleur *) newCouleur(couleurGris(0.15F,0.5F)),
                 (couleur *) couleurNoir(),
                 0,(couleur *) couleurNoir(),
                 (couleur *) couleurNoir(),
                 1,(couleur *) couleurBlanc(),
                 3.0F,indice,
                 0,0.0F };
materiel c6 = { (couleur *) newCouleur(couleurGris(0.15F,0.5F)),
                (couleur *) couleurNoir(),
                0,(couleur *) couleurNoir(),
                (couleur *) couleurNoir(),
                1,(couleur *) couleurBlanc(),
                3.0F,1.5F,
                0,0.0F };
materiel c7 = { (couleur *) couleurNoir(),
                (couleur *) couleurNoir(),
                1,(couleur *) couleurBlanc(),
                (couleur *) couleurNoir(),
                0,(couleur *) couleurNoir(),
                3.0F,1.5F,
                0,0.0F };
materiel c8 = { (couleur *) couleurJaune(),
                (couleur *) couleurNoir(),
                0,(couleur *) couleurGrisClair(),
                (couleur *) couleurNoir(),
                0,(couleur *) couleurNoir(),
                3.0F,1.5F,
                0,0.0F };
materiel c9 = { (couleur *) couleurCyan(),
                (couleur *) couleurNoir(),
                0,(couleur *) couleurGrisClair(),
                (couleur *) couleurNoir(),
                0,(couleur *) couleurNoir(),
                3.0F,1.5F,
                0,0.0F };
materiel c10 = { (couleur *) couleurRouge(),
                 (couleur *) couleurNoir(),
                 0,(couleur *) couleurGrisClair(),
                 (couleur *) couleurNoir(),
                 0,(couleur *) couleurNoir(),
                 3.0F,1.5F,
                 0,0.0F };
materiel c11 = { (couleur *) couleurVert(),
                 (couleur *) couleurNoir(),
                 0,(couleur *) couleurGrisClair(),
                 (couleur *) couleurNoir(),
                 0,(couleur *) couleurNoir(),
                 3.0F,1.5F,
                 0,0.0F };
materiel c12 = { (couleur *) couleurBlanc(),
                 (couleur *) couleurNoir(),
                 0,(couleur *) couleurGrisClair(),
                 (couleur *) couleurNoir(),
                 0,(couleur *) couleurNoir(),
                 3.0F,1.5F,
                 0,0.0F };

lumiere lums1[2] = { { { 0.0F,2.0F,-10.0F,1.0F },1.0F,(couleur *) couleurBlanc() },
                    { { 0.0F,-2.0F,-12.0F,1.0F },1.0F,(couleur *) couleurBlanc() } };
lumiere lums2[2] = { { { 6.0F,0.0F,-5.0F,1.0F },1.0F,(couleur *) couleurBlanc() },
                     { { -3.0F,0.0F,-8.0F,1.0F },1.0F,(couleur *) couleurBlanc() } };
lumiere lums3[2] = { { { 6.0F,0.0F,-7.5F,1.0F },2.0F,(couleur *) couleurJaune() },
                     { { -6.0F,0.0F,-7.5F,1.0F },2.0F,(couleur *) couleurBlanc() } };
lumiere lums6[2] = { { { 2.0F,1.0F,-6.0F,1.0F },2.5F,(couleur *) couleurBlanc() },
                     { { -2.0F,-1.0F,-6.0F,1.0F },2.5F,(couleur *) couleurBlanc() } };
objet objs1[4] = { { cube,2.0F,2.0F,-15.0F,45.0F,1.0F,1.0F,1.0F,1.6F,1.2F,0.9F,&c0 },
                   { cube,-2.0F,2.0F,-15.0F,60.0F,1.0F,1.0F,0.0F,2.4F,1.8F,1.2F,&c1 },
                   { sphere,-2.0F,-2.0F,-15.0F,25.0F,-1.0F,1.0F,1.0F,0.9F,1.2F,1.4F,&c2 },
                   { sphere,2.0F,-2.0F,-15.0F,60.0F,-1.0F,-1.0F,1.0F,0.6F,2.1F,1.9F,&c3 } };
objet objs2[2] = { { sphere,0.0F,0.0F,-15.0F,0.0F,0.0F,0.0F,1.0F,2.0F,3.0F,4.0F,&c2 },
                   { sphere,1.0F,0.0F,-10.0F,0.0F,0.0F,0.0F,1.0F,0.4F,0.4F,0.4F,&c3 } };
objet objs3[26] = { { cube,3.0F,3.0F,-15.0F,35.0F,1.0F,1.0F,1.0F,1.0F,0.8F,0.6F,&c41 },
                    { cube,3.0F,1.5F,-15.0F,35.0F,1.0F,1.0F,1.0F,1.0F,0.8F,0.6F,&c42 },
                    { cube,3.0F,0.0F,-15.0F,35.0F,1.0F,1.0F,1.0F,1.0F,0.8F,0.6F,&c43 },
                    { cube,3.0F,-1.5F,-15.0F,35.0F,1.0F,1.0F,1.0F,1.0F,0.8F,0.6F,&c44 },
                    { cube,3.0F,-3.0F,-15.0F,35.0F,1.0F,1.0F,1.0F,1.0F,0.8F,0.6F,&c45 },
                    { cube,1.5F,3.0F,-15.0F,35.0F,1.0F,1.0F,1.0F,1.0F,0.8F,0.6F,&c41 },
                    { cube,1.5F,1.5F,-15.0F,35.0F,1.0F,1.0F,1.0F,1.0F,0.8F,0.6F,&c42 },
                    { cube,1.5F,0.0F,-15.0F,35.0F,1.0F,1.0F,1.0F,1.0F,0.8F,0.6F,&c43 },
                    { cube,1.5F,-1.5F,-15.0F,35.0F,1.0F,1.0F,1.0F,1.0F,0.8F,0.6F,&c44 },
                    { cube,1.5F,-3.0F,-15.0F,35.0F,1.0F,1.0F,1.0F,1.0F,0.8F,0.6F,&c45 },
                    { cube,0.0F,3.0F,-15.0F,35.0F,1.0F,1.0F,1.0F,1.0F,0.8F,0.6F,&c41 },
                    { cube,0.0F,1.5F,-15.0F,35.0F,1.0F,1.0F,1.0F,1.0F,0.8F,0.6F,&c42 },
                    { cube,0.0F,0.0F,-15.0F,35.0F,1.0F,1.0F,1.0F,1.0F,0.8F,0.6F,&c43 },
                    { cube,0.0F,-1.5F,-15.0F,35.0F,1.0F,1.0F,1.0F,1.0F,0.8F,0.6F,&c44 },
                    { cube,0.0F,-3.0F,-15.0F,35.0F,1.0F,1.0F,1.0F,1.0F,0.8F,0.6F,&c45 },
                    { cube,-1.5F,3.0F,-15.0F,35.0F,1.0F,1.0F,1.0F,1.0F,0.8F,0.6F,&c41 },
                    { cube,-1.5F,1.5F,-15.0F,35.0F,1.0F,1.0F,1.0F,1.0F,0.8F,0.6F,&c42 },
                    { cube,-1.5F,0.0F,-15.0F,35.0F,1.0F,1.0F,1.0F,1.0F,0.8F,0.6F,&c43 },
                    { cube,-1.5F,-1.5F,-15.0F,35.0F,1.0F,1.0F,1.0F,1.0F,0.8F,0.6F,&c44 },
                    { cube,-1.5F,-3.0F,-15.0F,35.0F,1.0F,1.0F,1.0F,1.0F,0.8F,0.6F,&c45 },
                    { cube,-3.0F,3.0F,-15.0F,35.0F,1.0F,1.0F,1.0F,1.0F,0.8F,0.6F,&c41 },
                    { cube,-3.0F,1.5F,-15.0F,35.0F,1.0F,1.0F,1.0F,1.0F,0.8F,0.6F,&c42 },
                    { cube,-3.0F,0.0F,-15.0F,35.0F,1.0F,1.0F,1.0F,1.0F,0.8F,0.6F,&c43 },
                    { cube,-3.0F,-1.5F,-15.0F,35.0F,1.0F,1.0F,1.0F,1.0F,0.8F,0.6F,&c44 },
                    { cube,-3.0F,-3.0F,-15.0F,35.0F,1.0F,1.0F,1.0F,1.0F,0.8F,0.6F,&c45 },
                    { sphere,0.0F,0.0F,-9.0F,0.0F,0.0F,0.0F,1.0F,2.0F,2.0F,2.0F,&c5 } };
objet objs4[26] = { { cube,3.0F,3.0F,-15.0F,45.0F,1.0F,1.0F,1.0F,1.0F,0.8F,0.6F,&c41 },
                    { cube,3.0F,1.5F,-15.0F,45.0F,1.0F,1.0F,1.0F,1.0F,0.8F,0.6F,&c42 },
                    { cube,3.0F,0.0F,-15.0F,45.0F,1.0F,1.0F,1.0F,1.0F,0.8F,0.6F,&c43 },
                    { cube,3.0F,-1.5F,-15.0F,45.0F,1.0F,1.0F,1.0F,1.0F,0.8F,0.6F,&c44 },
                    { cube,3.0F,-3.0F,-15.0F,45.0F,1.0F,1.0F,1.0F,1.0F,0.8F,0.6F,&c45 },
                    { cube,1.5F,3.0F,-15.0F,45.0F,1.0F,1.0F,1.0F,1.0F,0.8F,0.6F,&c41 },
                    { cube,1.5F,1.5F,-15.0F,45.0F,1.0F,1.0F,1.0F,1.0F,0.8F,0.6F,&c42 },
                    { cube,1.5F,0.0F,-15.0F,45.0F,1.0F,1.0F,1.0F,1.0F,0.8F,0.6F,&c43 },
                    { cube,1.5F,-1.5F,-15.0F,45.0F,1.0F,1.0F,1.0F,1.0F,0.8F,0.6F,&c44 },
                    { cube,1.5F,-3.0F,-15.0F,45.0F,1.0F,1.0F,1.0F,1.0F,0.8F,0.6F,&c45 },
                    { cube,0.0F,3.0F,-15.0F,45.0F,1.0F,1.0F,1.0F,1.0F,0.8F,0.6F,&c41 },
                    { cube,0.0F,1.5F,-15.0F,45.0F,1.0F,1.0F,1.0F,1.0F,0.8F,0.6F,&c42 },
                    { cube,0.0F,0.0F,-15.0F,45.0F,1.0F,1.0F,1.0F,1.0F,0.8F,0.6F,&c43 },
                    { cube,0.0F,-1.5F,-15.0F,45.0F,1.0F,1.0F,1.0F,1.0F,0.8F,0.6F,&c44 },
                    { cube,0.0F,-3.0F,-15.0F,45.0F,1.0F,1.0F,1.0F,1.0F,0.8F,0.6F,&c45 },
                    { cube,-1.5F,3.0F,-15.0F,45.0F,1.0F,1.0F,1.0F,1.0F,0.8F,0.6F,&c41 },
                    { cube,-1.5F,1.5F,-15.0F,45.0F,1.0F,1.0F,1.0F,1.0F,0.8F,0.6F,&c42 },
                    { cube,-1.5F,0.0F,-15.0F,45.0F,1.0F,1.0F,1.0F,1.0F,0.8F,0.6F,&c43 },
                    { cube,-1.5F,-1.5F,-15.0F,45.0F,1.0F,1.0F,1.0F,1.0F,0.8F,0.6F,&c44 },
                    { cube,-1.5F,-3.0F,-15.0F,45.0F,1.0F,1.0F,1.0F,1.0F,0.8F,0.6F,&c45 },
                    { cube,-3.0F,3.0F,-15.0F,45.0F,1.0F,1.0F,1.0F,1.0F,0.8F,0.6F,&c41 },
                    { cube,-3.0F,1.5F,-15.0F,45.0F,1.0F,1.0F,1.0F,1.0F,0.8F,0.6F,&c42 },
                    { cube,-3.0F,0.0F,-15.0F,45.0F,1.0F,1.0F,1.0F,1.0F,0.8F,0.6F,&c43 },
                    { cube,-3.0F,-1.5F,-15.0F,45.0F,1.0F,1.0F,1.0F,1.0F,0.8F,0.6F,&c44 },
                    { cube,-3.0F,-3.0F,-15.0F,45.0F,1.0F,1.0F,1.0F,1.0F,0.8F,0.6F,&c45 },
                    { cube,0.0F,0.0F,-8.0F,40.0F,0.1F,1.0F,0.1F,3.0F,3.0F,0.7F,&c6 } };
objet objs5[6] = { { cube,0.0F,0.0F,-14.5F,0.0F,1.0F,1.0F,1.0F,4.5F,4.5F,0.2F,&c12 },
                   { cube,0.0F,2.5F,-12.0F,0.0F,1.0F,1.0F,1.0F,4.5F,0.2F,4.5F,&c11 },
                   { cube,0.0F,-2.5F,-12.0F,0.0F,1.0F,1.0F,1.0F,4.5F,0.2F,4.5F,&c10 },
                   { cube,2.5F,0.0F,-12.0F,0.0F,1.0F,1.0F,1.0F,0.2F,4.5F,4.5F,&c9 },
                   { cube,-2.5F,0.0F,-12.0F,0.0F,1.0F,1.0F,1.0F,0.2F,4.5F,4.5F,&c8 },
                   { sphere,0.0F,0.0F,-12.0F,0.0F,0.0F,0.0F,1.0F,1.75F,1.75F,1.75F,&c7 } };
scene sc1 = { 4,objs1,2,lums1,30.0F,5.0F,40.0F,160,160 };
scene sc2 = { 2,objs2,2,lums2,30.0F,5.0F,40.0F,160,160 };
scene sc3 = { 26,objs3,2,lums3,30.0F,5.0F,40.0F,210,210 };
scene sc4 = { 26,objs4,2,lums3,30.0F,5.0F,40.0F,240,240 };
scene sc5 = { 6,objs5,2,lums6,35.0F,5.0F,40.0F,210,210 };
scene *scenes[6] = { &sc1,&sc2,&sc3,&sc4,&sc5,&sc5 };
static int sce = 2;
static int nsce = 6;
static GLubyte *im = NULL ;

void displayZBuffer(scene *sc) {
  glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
  glMatrixMode(GL_PROJECTION);
  glLoadIdentity();
  gluPerspective(sc->vang,(double) width/height,sc->cmin,sc->cmax);
  glMatrixMode(GL_MODELVIEW);
  glLoadIdentity();
  glPushMatrix();
  glEnable(GL_LIGHTING);
  glEnable(GL_CULL_FACE);
  int i;
  for ( i = 0 ; i < sc->nlum ; i++ ) {
    int l = GL_LIGHT0+i;
    glEnable(l);
    float p[4] = { (float) sc->lum[i].pos[0],(float) sc->lum[i].pos[1],(float) sc->lum[i].pos[2],(float) sc->lum[i].pos[3] };
    glLightfv(l,GL_POSITION,p);
    float d[4] = { (float) sc->lum[i].coul->r*sensibilite*fact,(float) sc->lum[i].coul->v*sensibilite*fact,(float) sc->lum[i].coul->b*sensibilite*fact,(float) sc->lum[i].coul->a };
    glLightfv(l,GL_DIFFUSE,d);
    glLightfv(l,GL_SPECULAR,d);
    glLightfv(l,GL_AMBIENT,couleurNoir());
    glLightf(l,GL_CONSTANT_ATTENUATION,0.0F);
    glLightf(l,GL_QUADRATIC_ATTENUATION,1.0F); }   
  for ( ; i < 8 ; i++ ) {
    int l = GL_LIGHT0+i;
    glEnable(l); }
  for ( i = 0 ; i < sc->nobj ; i++ ) {
    glPushMatrix();
    glTranslated(sc->obj[i].tx,sc->obj[i].ty,sc->obj[i].tz);
    manipulateurSouris();
    manipulateurClavier();
    glRotated(sc->obj[i].a,sc->obj[i].ax,sc->obj[i].ay,sc->obj[i].az);
    glScaled(sc->obj[i].rx,sc->obj[i].ry,sc->obj[i].rz);
    glMaterialfv(GL_FRONT_AND_BACK,GL_DIFFUSE,(float *) sc->obj[i].m->diffuse);
    glMaterialfv(GL_FRONT_AND_BACK,GL_AMBIENT,(float *) sc->obj[i].m->ambient);
    glMaterialfv(GL_FRONT_AND_BACK,GL_SPECULAR,(float *) sc->obj[i].m->specular);
    glMaterialfv(GL_FRONT_AND_BACK,GL_EMISSION,(float *) sc->obj[i].m->emission);
    glMaterialfv(GL_FRONT_AND_BACK,GL_SHININESS,(float *) &sc->obj[i].m->shininess);
    switch(sc->obj[i].type) {
      case cube     : glutSolidCube(1.0);
                      break;
      case sphere   : glutSolidSphere(1.0,180,180);
                      break; }
    glPopMatrix(); }
  glDisable(GL_LIGHTING);
  glDisable(GL_CULL_FACE);
  glPopMatrix();
  glFlush();
  glutSwapBuffers();
}

void display(void) {
  glMatrixMode(GL_PROJECTION);
  glLoadIdentity();
  gluPerspective(scenes[sce]->vang,(double) width/height,scenes[sce]->cmin,scenes[sce]->cmax);
  glMatrixMode(GL_MODELVIEW);
  glLoadIdentity();
  glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
  displayZBuffer(scenes[sce]);
  glFlush();
  glutSwapBuffers();
  glutSwapBuffers();
}

void myinit (void) {
  glClearColor(0.0F,0.0F,0.0F,0.0F);
  glEnable(GL_DEPTH_TEST);
  glEnable(GL_ALPHA_TEST);
  glEnable(GL_BLEND);
  glPixelStorei(GL_UNPACK_ALIGNMENT,1); 
  glBlendFunc(GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA);
  glLightModeli(GL_LIGHT_MODEL_TWO_SIDE,GL_TRUE);
}

void reshape(int w, int h) {
  glViewport(0,0,w,h);
  width = w;
  height = h;
}

void ajustementTailleFenetre() {
  if ( ( scenes[sce]->tx != width ) || ( scenes[sce]->ty != height ) )
    glutReshapeWindow(scenes[sce]->tx,scenes[sce]->ty);
    else
    glutPostRedisplay();
}

static int j = 0;
static int anim = 0;

void reAnime(void) {
  j = 0;
  anim = 0; }

void idle(void) {
  int w = width2;
  int h = height2;
  glutSetWindow(f1);
  ajustementTailleFenetre();
  glutSetWindow(f2);
  ajustementTailleFenetre();
  if ( j == 0 )
    im = initialisationsCalculImageLancerDeRayon(scenes[sce],width2,height2);
  calculImageLancerDeRayon(scenes[sce],j,w,h,&im[(j*w)*3]);
  j++;
  if ( j == h ) {
    glutIdleFunc(NULL);
    anim = 0;
    j = 0; }
    else
    glutPostRedisplay();
}

void key2(unsigned char key,int x,int y) {
  switch (key) {
    case 0x0D : anim = 1;
                glutIdleFunc(idle);
                break;
    case ' '  : printf("Indice = ");
                scanf("%f",&indice);
                if ( indice < 0.01F )
                  indice = 0.01F ;
                if ( sce == 2 )
                  c5.indice = indice;
                reAnime();
                glutIdleFunc(idle);
                break ;
    case 43   : indice += 0.01F;
                if ( sce == 2 )
                  c5.indice = indice;
                reAnime();
                glutIdleFunc(idle);
                break;
    case 45   : indice -= 0.01F;
                if ( indice < 1.0F )
                  indice = 1.0F;
                if ( sce == 2 )
                  c5.indice = indice;
                reAnime();
                glutIdleFunc(idle);
                break;
    case 's'  :
    case 'S'  : sce = (sce+1) % nsce;
                if ( sce == 2 )
                  c5.indice = indice;
                if ( sce == 4 )
                  c7.r = c8.r = c9.r = c10.r = c11.r = 0;
                if ( sce == 5 )
                  c7.r = c8.r = c9.r = c10.r = c11.r = 1;
                reAnime();
                glutIdleFunc(idle);
                break ;
    case 0x1B : exit(0) ;
                break; }
}

void key(unsigned char ky,int x,int y) {
  if ( keyManipulateur(ky,x,y) )
    glutPostRedisplay();
    else
    key2(ky,x,y);
}

void displayLancerDeRayon(scene *sc) {
  glPushMatrix() ;
  int w = width2;
  int h = height2;
  if ( im == NULL ) {
    int t = w*h*3 ;
    im =(GLubyte *) calloc(t,sizeof(GLubyte)); }
  glRasterPos2f(0.0F,0.0F) ;
  glDrawPixels(w,h,GL_RGB,GL_UNSIGNED_BYTE,im) ;
  glPopMatrix() ;
}

void display2(void) {
  glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
  displayLancerDeRayon(scenes[sce]);
  if ( sce == 2 ) {
    setAlignement(CENTER);
    placeFontCursor(width2/2,10.0,0.1F);
    simpleBitmapOutput(1,REGULAR8x13,"INDICE : %6.4f",indice) ; }
  glFlush();
  glutSwapBuffers();
}

void reshape2(int w,int h) {
  glutIdleFunc(idle);
  glViewport(0,0,w,h);
  width2 = w;
  height2 = h;
  int ww = w;
  int hh = h;
  int t = ww*hh*3 ;
  im =(GLubyte *) calloc(t,sizeof(GLubyte));
  glMatrixMode(GL_PROJECTION);
  glLoadIdentity();
  glOrtho(0,w,0,h,-1.0,1.0); 
  glMatrixMode(GL_MODELVIEW);
  glLoadIdentity();
}

int main(int argc,char **argv) {
  glutInit(&argc,argv);
  glutInitDisplayMode(GLUT_RGBA|GLUT_DEPTH|GLUT_DOUBLE);
  { glutInitWindowSize(320,180); 
    glutInitWindowPosition(20,20); 
    f1 = glutCreateWindow("Mini lancer de rayons: Z-Buffer et Gouraud"); 
    myinit(); 
    ajustementTailleFenetre();
    creationMenuBasique();
    glutKeyboardFunc(key);
    glutReshapeFunc(reshape);
    glutDisplayFunc(display);
    glutSpecialFunc(specialBasique);
    glutMotionFunc(motionBasique);
    glutMouseFunc(sourisBasique); }
  { glutInitWindowPosition(30,300); 
    glutInitWindowSize(320,180); 
    f2 = glutCreateWindow("Mini lancer de rayons: Lancer de rayons"); 
    myinit(); 
    ajustementTailleFenetre();
    creationMenuBasique();
    glutIdleFunc(idle);
    glutKeyboardFunc(key2);
    glutReshapeFunc(reshape2);
    glutDisplayFunc(display2); }
  glutMainLoop();
  return(0);
}