RETOUR/* Auteur: Nicolas JANEY */
/* nicolas.janey@univ-fcomte.fr */
/* Septembre 2007 */
/* Une animation en OpenGL */
#include <stdio.h>
#include <GL/glut.h>
#include <GL/gl.h>
#include <GL/glu.h>
#include "ModuleCubes.h"
/* Variables et constantes globales */
/* pour les angles et les couleurs utilises */
static float rotation = 0.0F;
static int solution = 0;
static int disc = 30;
static float rayon = 2.0F;
static const float blanc[] = { 1.0F,1.0F,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 };
/* Variables globales de gestion */
/* de l'interactivite clavier et souris */
static int clic = 0;
static int mx;
static int my;
static float rx = 0.0F;
static float ry = 0.0F;
/* Fonction d'initialisation des parametres */
/* OpenGL ne changeant pas au cours de la vie */
/* du programme */
void init(void) {
const GLfloat mat_shininess[] = { 80.0 };
const GLfloat light0_position[] = { 2.0, 2.0,2.0,1.0 };
const GLfloat light1_position[] = { -2.0, 2.0,2.0,1.0 };
const GLfloat light2_position[] = { 2.0,-2.0,2.0,1.0 };
glMaterialfv(GL_FRONT,GL_SPECULAR,blanc);
glMaterialfv(GL_FRONT,GL_SHININESS,mat_shininess);
glLightfv(GL_LIGHT0,GL_DIFFUSE,rouge);
glLightfv(GL_LIGHT1,GL_DIFFUSE,vert);
glLightfv(GL_LIGHT2,GL_DIFFUSE,bleu);
glLightfv(GL_LIGHT0,GL_POSITION,light0_position);
glLightfv(GL_LIGHT1,GL_POSITION,light1_position);
glLightfv(GL_LIGHT2,GL_POSITION,light2_position);
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
glEnable(GL_LIGHT1);
glEnable(GL_LIGHT2);
glDepthFunc(GL_LESS);
glEnable(GL_DEPTH_TEST);
glEnable(GL_NORMALIZE);
glEnable(GL_AUTO_NORMAL);
}
/* Scene dessinee */
void scene(float rayon) {
glPushMatrix();
glRotatef(rotation,0.0F,0.0F,1.0F);
glPushMatrix();
glTranslatef(-rayon,0.0F,0.0F);
glutSolidSphere(1.0,disc,disc);
glPopMatrix();
glPushMatrix();
glTranslatef(rayon,0.0F,0.0F);
mySolidCube(2.0,disc);
glPopMatrix();
glPopMatrix();
}
/* Fonction executee lors d'un rafraichissement */
/* de la fenetre de dessin */
void display2(void) {
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glPushMatrix();
glRotatef(rx,1.0F,0.0F,0.0F);
glRotatef(ry,0.0F,1.0F,0.0F);
scene(rayon);
glPopMatrix();
glFlush();
glutSwapBuffers();
}
/* Fonction executee lors d'un rafraichissement */
/* de la fenetre de dessin */
void display1(void) {
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glPushMatrix();
glRotatef(rx,1.0F,0.0F,0.0F);
glRotatef(ry,0.0F,1.0F,0.0F);
scene(2.0F);
glPopMatrix();
glFlush();
glutSwapBuffers();
}
/* Fonction executee lors qu'aucun evenement */
/* n'est en file d'attente */
void idle2(void) {
rotation += 1.0F;
rayon -= 0.0005F;
if ( rayon < 1.0F )
rayon = 1.0F;
glutPostRedisplay();
}
/* Fonction executee lors qu'aucun evenement */
/* n'est en file d'attente */
void idle1(void) {
rotation += 1.0F;
glutPostRedisplay();
}
/* Fonction executee lors d'un clic de souris */
/* dans la fenetre */
void mouse(int bouton,int etat,int x,int y) {
if ( bouton == GLUT_LEFT_BUTTON ) {
if ( etat == GLUT_DOWN ) {
clic = 1;
mx = x;
my = y; }
if ( etat == GLUT_UP ) {
clic = 0; } }
}
/* Fonction executee lors d'un deplacement */
/* de la souris sur la fenetre */
/* avec un bouton appuye */
void motion(int x,int y) {
if ( clic ) {
ry += (x-mx);
rx += (y-my);
mx = x;
my = y;
glutPostRedisplay(); }
}
/* Fonction executee lors d'un changement */
/* de la taille de la fenetre OpenGL */
void reshape(int x,int y) {
glViewport(0,0,x,y);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(-4.0,4.0,(double) -4.0*y/x,(double) 4.0*y/x,-4.0,4.0);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
}
/* Fonction executee lors de la frappe */
/* d'une touche alphanumerique du clavier */
void key(unsigned char key,int x,int y) {
switch ( key ) {
case 43 : disc++;
glutPostRedisplay();
break;
case 45 : disc--;
if ( disc < 1 )
disc = 1;
glutPostRedisplay();
break;
case 0x20 : rayon = 2.0;
glutPostRedisplay();
break;
case 0x0D : solution = (solution+1)%2;
glutDisplayFunc(( solution == 0 ) ? display1 : display2);
glutIdleFunc(( solution == 0 ) ? idle1 : idle2);
glutPostRedisplay();
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("Un cube et une sphere en orbite");
init();
glutReshapeFunc(reshape);
glutKeyboardFunc(key);
glutMotionFunc(motion);
glutMouseFunc(mouse);
glutIdleFunc(idle1);
glutDisplayFunc(display1);
glutMainLoop();
return(0);
}