RETOUR
Le source : LumieresEtMateriaux.cpp
/* Gestion de lumieres et de materiaux */
/* */
/* Auteur: Nicolas JANEY */
/* nicolas.janey@univ-fcomte.fr */
/* Septembre 2011 */
#include <stdlib.h>
#include <stdio.h>
#include <GL/glut.h>
#include <GL/gl.h>
#include <GL/glu.h>
/* Variables et constantes globales */
/* pour les angles et les couleurs utilises */
static float rx = 0.0F;
static float ry = 0.0F;
static float rz = 0.0F;
static const float blanc[] = { 1.0F,1.0F,1.0F,1.0F };
static const float jaune[] = { 1.0F,1.0F,0.0F,1.0F };
static const float cyan[] = { 0.0F,1.0F,1.0F,1.0F };
static const float magenta[] = { 1.0F,0.0F,1.0F,1.0F };
static const float rouge[] = { 1.0F,0.0F,0.0F,1.0F };
static const float vert[] = { 0.0F,1.0F,0.0F,1.0F };
static const float bleu[] = { 0.0F,0.0F,1.0F,1.0F };
static const float noir[] = { 0.0F,0.0F,0.0F,1.0F };
static const float grisMoyen[] = { 0.5F,0.5F,0.5F,1.0F };
static const float jauneMoyen[] = { 0.5F,0.5F,0.0F,1.0F };
static const float defaultDiff[] = { 0.8F,0.8F,0.8F,1.0F };
static const float defaultSpec[] = { 0.0F,0.0F,0.0F,1.0F };
static const float defaultAmbi[] = { 0.2F,0.2F,0.2F,1.0F };
static int scn = 0;
static int n = 18;
static int aff = 1;
/* Fonction d'initialisation des parametres */
/* OpenGL ne changeant pas au cours de la vie */
/* du programme */
void init(void) {
glDepthFunc(GL_LESS);
glEnable(GL_DEPTH_TEST);
glEnable(GL_NORMALIZE);
glEnable(GL_AUTO_NORMAL);
}
/* Scene dessinee */
void scene(void) {
glPushMatrix();
glutSolidTorus(1.0,9.0F,n,n*8);
glRotatef(90.0F,1.0F,0.0F,0.0F);
glutSolidTorus(1.0,9.0F,n,n*8);
glRotatef(90.0F,0.0F,1.0F,0.0F);
glutSolidTorus(1.0,9.0F,n,n*8);
glPopMatrix();
}
void configurationLumieresEtMateriaux(void) {
glEnable(GL_LIGHTING);
glDisable(GL_LIGHT0);
glDisable(GL_LIGHT1);
glDisable(GL_LIGHT2);
switch (scn) {
case 0 :
case 1 :
case 2 :
glMaterialfv(GL_FRONT,GL_AMBIENT,noir);
glMaterialfv(GL_FRONT,GL_SPECULAR,noir);
glMaterialfv(GL_FRONT,GL_DIFFUSE,defaultDiff);
break;
case 3 :
glMaterialfv(GL_FRONT,GL_AMBIENT,noir);
glMaterialfv(GL_FRONT,GL_DIFFUSE,defaultDiff);
glMaterialfv(GL_FRONT,GL_SPECULAR,blanc);
{ const GLfloat shininess[] = { 64.0 };
glMaterialfv(GL_FRONT,GL_SHININESS,shininess); }
break;
case 4 :
glMaterialfv(GL_FRONT,GL_AMBIENT,defaultAmbi);
glMaterialfv(GL_FRONT,GL_DIFFUSE,noir);
glMaterialfv(GL_FRONT,GL_SPECULAR,noir);
break; }
const GLfloat light0_position[] = { 0.0, 0.0, 0.0, 1.0 };
const GLfloat light1_position[] = { 1.0, 0.0, 0.0, 0.0 };
const GLfloat light2_position[] = { -20.0,20.0,20.0, 1.0 };
const GLfloat light2_dir[] = { 1.0,-1.0,-1.0 };
switch (scn) {
case 0 :
glEnable(GL_LIGHT0);
glLightfv(GL_LIGHT0,GL_DIFFUSE,jaune);
glLightfv(GL_LIGHT0,GL_POSITION,light0_position);
break;
case 1 :
glEnable(GL_LIGHT0);
glEnable(GL_LIGHT1);
glLightfv(GL_LIGHT0,GL_DIFFUSE,jaune);
glLightfv(GL_LIGHT1,GL_DIFFUSE,cyan);
glLightfv(GL_LIGHT0,GL_POSITION,light0_position);
glLightfv(GL_LIGHT1,GL_POSITION,light1_position);
break;
case 2 :
glEnable(GL_LIGHT0);
glEnable(GL_LIGHT1);
glEnable(GL_LIGHT2);
glLightfv(GL_LIGHT0,GL_DIFFUSE,jaune);
glLightfv(GL_LIGHT1,GL_DIFFUSE,cyan);
glLightfv(GL_LIGHT2,GL_DIFFUSE,magenta);
glLightfv(GL_LIGHT0,GL_POSITION,light0_position);
glLightfv(GL_LIGHT1,GL_POSITION,light1_position);
glLightfv(GL_LIGHT2,GL_POSITION,light2_position);
glLightfv(GL_LIGHT2,GL_SPOT_DIRECTION,light2_dir);
glLightf(GL_LIGHT2,GL_SPOT_CUTOFF,10.0F);
break;
case 3 :
glEnable(GL_LIGHT0);
glEnable(GL_LIGHT1);
glEnable(GL_LIGHT2);
glLightfv(GL_LIGHT0,GL_DIFFUSE,jaune);
glLightfv(GL_LIGHT1,GL_DIFFUSE,cyan);
glLightfv(GL_LIGHT2,GL_DIFFUSE,magenta);
glLightfv(GL_LIGHT0,GL_SPECULAR,blanc);
glLightfv(GL_LIGHT1,GL_SPECULAR,blanc);
glLightfv(GL_LIGHT2,GL_SPECULAR,blanc);
glLightfv(GL_LIGHT0,GL_POSITION,light0_position);
glLightfv(GL_LIGHT1,GL_POSITION,light1_position);
glLightfv(GL_LIGHT2,GL_POSITION,light2_position);
glLightfv(GL_LIGHT2,GL_SPOT_DIRECTION,light2_dir);
glLightf(GL_LIGHT2,GL_SPOT_CUTOFF,10.0F);
break;
case 4 :
glEnable(GL_LIGHT0);
glLightfv(GL_LIGHT0,GL_DIFFUSE,noir);
glLightfv(GL_LIGHT0,GL_SPECULAR,noir);
glLightfv(GL_LIGHT0,GL_AMBIENT,jauneMoyen);
break; }
}
/* Fonction executee lors d'un changement */
/* de la taille de la fenetre OpenGL */
void reshape(int w,int h) {
glViewport(0,0,w,h);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(14.0F,(float) w/h,80.0,120.0);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
gluLookAt(0.0,0.0,100.0,0.0,0.0,0.0,0.0,1.0,0.0);
}
/* Fonction executee lors d'un rafraichissement */
/* de la fenetre de dessin */
void display(void) {
glClearColor(0.5F,0.5F,0.5F,1.0F);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
configurationLumieresEtMateriaux();
glPolygonMode(GL_FRONT_AND_BACK,(aff) ? GL_FILL : GL_LINE);
glPushMatrix();
glRotatef(rx,1.0F,0.0F,0.0F);
glRotatef(ry,0.0F,1.0F,0.0F);
glRotatef(rz,0.0F,0.0F,1.0F);
scene();
glPopMatrix();
glFlush();
glutSwapBuffers();
}
/* Fonction executee lorsqu'aucun evenement */
/* n'est en file d'attente */
void idle(void) {
rx += 0.3355F;
ry += 0.6117F;
rz += 0.4174F;
glutPostRedisplay();
}
/* Fonction executee lors de la frappe */
/* d'une touche special du clavier: */
/* - touches de curseur */
/* - touches de fonction */
/* - ... */
void special(int code,int x,int y) {
switch ( code ) {
case GLUT_KEY_UP :
rx += 1.0F;
glutPostRedisplay();
break;
case GLUT_KEY_DOWN :
rx -= 1.0F;
glutPostRedisplay();
break;
case GLUT_KEY_RIGHT :
ry += 1.0F;
glutPostRedisplay();
break;
case GLUT_KEY_LEFT :
ry -= 1.0F;
glutPostRedisplay();
break;
case GLUT_KEY_PAGE_UP :
rz += 1.0F;
glutPostRedisplay();
break;
case GLUT_KEY_PAGE_DOWN :
rz -= 1.0F;
glutPostRedisplay();
break; }
}
/* Fonction executee lors de l'appui */
/* d'une touche alphanumerique du clavier */
void keyboard(unsigned char key,int x,int y) {
switch (key) {
case 'r' :
rx = 35.0F;
ry = 10.0F;
rz = 40.0F;
glutPostRedisplay();
break;
case 43 :
n++;
glutPostRedisplay();
break;
case 45 :
n--;
if ( n == 2 )
n = 3;
glutPostRedisplay();
break;
case 0x20 :
scn = (scn+1)%5;
glutPostRedisplay();
break;
case 'm' :
aff = !aff;
glutPostRedisplay();
break;
case 0x0D :
{ static int anim = 0;
anim = !anim;
glutIdleFunc(( anim ) ? idle : NULL); }
break;
case 0x1B :
exit(0);
break; }
}
/* Fonction principale */
int main(int argc,char **argv) {
glutInit(&argc,argv);
glutInitDisplayMode(GLUT_RGBA|GLUT_DEPTH|GLUT_DOUBLE);
glutInitWindowSize(300,300);
glutInitWindowPosition(50,50);
glutCreateWindow("Lumieres et matériaux");
init();
glutKeyboardFunc(keyboard);
glutSpecialFunc(special);
glutReshapeFunc(reshape);
glutDisplayFunc(display);
glutMainLoop();
return(0);
}