RETOURFichier source : AnimationSphere.cpp
/* Gestion de camera et animation automatique */
/* d'une sphere par rebond sur les bords */
/* de la fenetre d'affichage */
/* */
/* Auteur: Nicolas JANEY */
/* nicolas.janey@univ-fcomte.fr */
/* Mars 2015 */
#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 int aff = 1;
static int lum = 1;
static int posx = 250;
static int posy = 150;
static int dx = 1;
static int dy = 1;
static int n = 100;
static int tx = 500;
static int ty = 300;
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 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 };
/* Fonction d'initialisation des parametres */
/* OpenGL ne changeant pas au cours de la vie */
/* du programme */
void init(void) {
const GLfloat shininess[] = { 50.0 };
glMaterialfv(GL_FRONT,GL_SPECULAR,blanc);
glMaterialfv(GL_FRONT,GL_SHININESS,shininess);
glLightfv(GL_LIGHT0,GL_DIFFUSE,rouge);
glLightfv(GL_LIGHT1,GL_DIFFUSE,jaune);
glLightfv(GL_LIGHT2,GL_DIFFUSE,bleu);
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(void) {
glPushMatrix();
glTranslatef(posx,posy,0.0F);
glutSolidSphere(20.0,n,n);
glPopMatrix();
}
/* Fonction executee lors d'un changement */
/* de la taille de la fenetre OpenGL */
void reshape(int x,int y) {
tx = x;
ty = y;
glViewport(0,0,x,y);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(0.0,x,0.0,y,-30.0,30.0);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
}
/* Fonction executee lors d'un rafraichissement */
/* de la fenetre de dessin */
void display(void) {
glClearColor(0.5F,0.5F,0.5F,0.5F);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
const GLfloat light0_position[] = { 0.0,0.0,0.0,1.0 };
const GLfloat light1_position[] = { -1.0,1.0,1.0,0.0 };
const GLfloat light2_position[] = { 1.0,-1.0,1.0,0.0 };
glLightfv(GL_LIGHT0,GL_POSITION,light0_position);
glLightfv(GL_LIGHT1,GL_POSITION,light1_position);
glLightfv(GL_LIGHT2,GL_POSITION,light2_position);
if ( lum )
glEnable(GL_LIGHTING);
else
glDisable(GL_LIGHTING);
glPolygonMode(GL_FRONT_AND_BACK,(aff) ? GL_FILL : GL_LINE);
glPushMatrix();
scene();
glPopMatrix();
glFlush();
glutSwapBuffers();
int error = glGetError();
if ( error != GL_NO_ERROR )
printf("Erreur : %d\n",error);
}
/* Fonction executee quand aucun evenement */
/* n'est en file d'attente */
void idle(void) {
/* Deplacement */
posx += dx;
posy += dy;
/* Gestion du fenetrage */
if ( posx+20 > tx )
posx = tx-20;
if ( posy+20 > ty )
posy = ty-20;
/* Gestion des rebonds */
if ( ( posx-20 == 0 ) || ( posx+20 == tx ) )
dx = -dx;
if ( ( posy+20 == ty ) || ( posy-20 == 0 ) )
dy = -dy;
/* Rafraichissement */
glutPostRedisplay();
}
/* Fonction executee lors de l'appui */
/* d'une touche alphanumerique du clavier: */
/* - lettres minuscules et majuscules */
/* - chiffres */
/* - /+-*,.;: */
/* - autres touches a code ASCII: */
/* - espace */
/* - enter */
/* - escape */
void keyboard(unsigned char key,int x,int y) {
switch (key) {
case 0x0D :
{ static int anim = 1;
anim = !anim;
glutIdleFunc(( anim ) ? idle : NULL); }
break;
case 'm' :
aff = !aff;
glutPostRedisplay();
break;
case 'l' :
lum = !lum;
glutPostRedisplay();
break;
case 43 :
n++;
glutPostRedisplay();
break;
case 45 :
n--;
if ( n == 2 )
n = 3;
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(tx,ty);
glutInitWindowPosition(50,50);
glutCreateWindow("Boule rebondissante");
init();
glutKeyboardFunc(keyboard);
glutReshapeFunc(reshape);
glutDisplayFunc(display);
glutIdleFunc(idle);
glutMainLoop();
return(0);
}