Le source : Interactivite2011-2012.cpp
/* Implantation de l'interactivite clavier */
/* en OpenGL */
/* */
/* 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 int aff = 1;
static int lum = 1;
static float rx = 10.0F;
static float ry = 20.0F;
static float rz = 40.0F;
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 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();
for ( int i = -1 ; i < 2 ; i++ )
for ( int j = -1 ; j < 2 ; j++ )
for ( int k = -1 ; k < 2 ; k++ ) {
glPushMatrix();
glTranslatef(i*6.0F,j*6.0F,k*6.0F);
glutSolidCube(2.0);
glPopMatrix(); }
glPopMatrix();
}
/* 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((double) -x/y*10.0,(double) x/y*10.0,-10.0,10.0,-10.0,10.0);
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();
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();
int error = glGetError();
if ( error != GL_NO_ERROR )
printf("Erreur : %d\n",error);
}
/* 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: */
/* - 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 0x20 :
aff = !aff;
glutPostRedisplay();
break;
case 0x0D :
lum = !lum;
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("Interactivité clavier");
init();
glutKeyboardFunc(keyboard);
glutSpecialFunc(special);
glutReshapeFunc(reshape);
glutDisplayFunc(display);
glutMainLoop();
return(0);
}
RETOUR