Le source: ProblemeGouraud.cpp
/* Auteur: Nicolas JANEY */
/* nicolas.janey@univ-fcomte.fr */
/* Avril 2001 */
/* Illustration des problemes d'affichage */
/* lies a l'algorithme de Gouraud */
#include <GL/glut.h>
#include <GL/gl.h>
#include <GL/glu.h>
#include <math.h>
#include "ModuleCouleurs.h"
#include "ModuleFleche.h"
#include "ModuleManipulateur.h"
#include "ModuleMenus.h"
#include "ModuleReshape.h"
static int aff = 0;
static int mode = 0;
static float amp = 0.3F;
void initlights(void) {
GLfloat shininess[] = { 0.0F };
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
glLightfv(GL_LIGHT0,GL_AMBIENT,couleurNoir());
glMaterialfv(GL_FRONT,GL_DIFFUSE,couleurBrun());
glMaterialfv(GL_FRONT,GL_SPECULAR,couleurNoir());
glMaterialfv(GL_FRONT,GL_SHININESS,shininess);
}
void scene1(void) {
float nx = -2*amp;
float nz = 1;
float d = sqrt(nx*nx+nz*nz);
nx /= d;
nz /= d;
glPushMatrix();
glBegin(GL_QUAD_STRIP) ;
glNormal3f(nx,0.0F,nz) ;
glVertex3f(-3.0F,2.0F,-amp) ;
glVertex3f(-3.0F,-2.0F,-amp) ;
glNormal3f(0.0F,0.0F,1.0F) ;
glVertex3f(-2.0F,2.0F,amp) ;
glVertex3f(-2.0F,-2.0F,amp) ;
glVertex3f(-1.0F,2.0F,-amp) ;
glVertex3f(-1.0F,-2.0F,-amp) ;
glVertex3f(0.0F,2.0F,amp) ;
glVertex3f(0.0F,-2.0F,amp) ;
glVertex3f(1.0F,2.0F,-amp) ;
glVertex3f(1.0F,-2.0F,-amp) ;
glVertex3f(2.0F,2.0F,amp) ;
glVertex3f(2.0F,-2.0F,amp) ;
glNormal3f(-nx,0.0F,nz) ;
glVertex3f(3.0F,2.0F,-amp) ;
glVertex3f(3.0F,-2.0F,-amp) ;
glEnd() ;
if ( aff ) {
glPushMatrix();
glTranslatef(-2.5F,0.0F,0.0F);
flecheEnVolume(nx,0.0F,nz,0.1F,0.25F,0.02F);
glPopMatrix();
glPushMatrix();
glTranslatef(-1.5F,0.0F,0.0F);
flecheEnVolume(-nx,0.0F,nz,0.1F,0.25F,0.02F);
glPopMatrix();
glPushMatrix();
glTranslatef(-0.5F,0.0F,0.0F);
flecheEnVolume(nx,0.0F,nz,0.1F,0.25F,0.02F);
glPopMatrix();
glPushMatrix();
glTranslatef(0.5F,0.0F,0.0F);
flecheEnVolume(-nx,0.0F,nz,0.1F,0.25F,0.02F);
glPopMatrix();
glPushMatrix();
glTranslatef(1.5F,0.0F,0.0F);
flecheEnVolume(nx,0.0F,nz,0.1F,0.25F,0.02F);
glPopMatrix();
glPushMatrix();
glTranslatef(2.5F,0.0F,0.0F);
flecheEnVolume(-nx,0.0F,nz,0.1F,0.25F,0.02F);
glPopMatrix();
glPushMatrix();
glTranslatef(-3.0F,2.0F,-amp);
flecheEnVolume(nx,0.0F,nz,0.1F,0.25F,0.02F);
glPopMatrix();
glPushMatrix();
glTranslatef(-3.0F,-2.0F,-amp);
flecheEnVolume(nx,0.0F,nz,0.1F,0.25F,0.02F);
glPopMatrix();
glPushMatrix();
glTranslatef(3.0F,2.0F,-amp);
flecheEnVolume(-nx,0.0F,nz,0.1F,0.25F,0.02F);
glPopMatrix();
glPushMatrix();
glTranslatef(3.0F,-2.0F,-amp);
flecheEnVolume(-nx,0.0F,nz,0.1F,0.25F,0.02F);
glPopMatrix();
for ( int i = -2 ; i <=2 ; i++ ) {
glPushMatrix();
glTranslatef(i,-2.0F,( i%2 == 0 ) ? amp : -amp);
flecheEnVolume(0.0F,0.0F,1.0,0.1F,0.25F,0.02F);
glPopMatrix();
glPushMatrix();
glTranslatef(i,2.0F,( i%2 == 0 ) ? amp : -amp);
flecheEnVolume(0.0F,0.0F,1.0,0.1F,0.25F,0.02F);
glPopMatrix(); } }
glPopMatrix();
}
void scene2(void) {
float nx = -2*amp;
float nz = 1;
float d = sqrt(nx*nx+nz*nz);
nx /= d;
nz /= d;
glPushMatrix();
glBegin(GL_QUADS) ;
glNormal3f(nx,0.0F,nz) ;
glVertex3f(-3.0F,2.0F,-amp) ;
glVertex3f(-3.0F,-2.0F,-amp) ;
glVertex3f(-2.0F,-2.0F,amp) ;
glVertex3f(-2.0F,2.0F,amp) ;
glNormal3f(-nx,0.0F,nz) ;
glVertex3f(-2.0F,2.0F,amp) ;
glVertex3f(-2.0F,-2.0F,amp) ;
glVertex3f(-1.0F,-2.0F,-amp) ;
glVertex3f(-1.0F,2.0F,-amp) ;
glNormal3f(nx,0.0F,nz) ;
glVertex3f(-1.0F,2.0F,-amp) ;
glVertex3f(-1.0F,-2.0F,-amp) ;
glVertex3f(0.0F,-2.0F,amp) ;
glVertex3f(0.0F,2.0F,amp) ;
glNormal3f(-nx,0.0F,nz) ;
glVertex3f(0.0F,2.0F,amp) ;
glVertex3f(0.0F,-2.0F,amp) ;
glVertex3f(1.0F,-2.0F,-amp) ;
glVertex3f(1.0F,2.0F,-amp) ;
glNormal3f(nx,0.0F,nz) ;
glVertex3f(1.0F,2.0F,-amp) ;
glVertex3f(1.0F,-2.0F,-amp) ;
glVertex3f(2.0F,-2.0F,amp) ;
glVertex3f(2.0F,2.0F,amp) ;
glNormal3f(-nx,0.0F,nz) ;
glVertex3f(2.0F,2.0F,amp) ;
glVertex3f(2.0F,-2.0F,amp) ;
glVertex3f(3.0F,-2.0F,-amp) ;
glVertex3f(3.0F,2.0F,-amp) ;
glEnd() ;
if ( aff ) {
glPushMatrix();
glTranslatef(-2.5F,0.0F,0.0F);
flecheEnVolume(nx,0.0F,nz,0.1F,0.25F,0.02F);
glPopMatrix();
glPushMatrix();
glTranslatef(-1.5F,0.0F,0.0F);
flecheEnVolume(-nx,0.0F,nz,0.1F,0.25F,0.02F);
glPopMatrix();
glPushMatrix();
glTranslatef(-0.5F,0.0F,0.0F);
flecheEnVolume(nx,0.0F,nz,0.1F,0.25F,0.02F);
glPopMatrix();
glPushMatrix();
glTranslatef(0.5F,0.0F,0.0F);
flecheEnVolume(-nx,0.0F,nz,0.1F,0.25F,0.02F);
glPopMatrix();
glPushMatrix();
glTranslatef(1.5F,0.0F,0.0F);
flecheEnVolume(nx,0.0F,nz,0.1F,0.25F,0.02F);
glPopMatrix();
glPushMatrix();
glTranslatef(2.5F,0.0F,0.0F);
flecheEnVolume(-nx,0.0F,nz,0.1F,0.25F,0.02F);
glPopMatrix();
int i ;
for ( i = 0 ; i < 3 ; i++ ) {
glPushMatrix();
glTranslatef(-2.0F+2*i,2.0F,amp);
flecheEnVolume(nx,0.0F,nz,0.1F,0.25F,0.02F);
glPopMatrix();
glPushMatrix();
glTranslatef(-2.0F+2*i,-2.0F,amp);
flecheEnVolume(nx,0.0F,nz,0.1F,0.25F,0.02F);
glPopMatrix();
glPushMatrix();
glTranslatef(-3.0F+2*i,2.0F,-amp);
flecheEnVolume(nx,0.0F,nz,0.1F,0.25F,0.02F);
glPopMatrix();
glPushMatrix();
glTranslatef(-3.0F+2*i,-2.0F,-amp);
flecheEnVolume(nx,0.0F,nz,0.1F,0.25F,0.02F);
glPopMatrix(); }
for ( i = 0 ; i < 3 ; i++ ) {
glPushMatrix();
glTranslatef(-1.0F+2*i,2.0F,-amp);
flecheEnVolume(-nx,0.0F,nz,0.1F,0.25F,0.02F);
glPopMatrix();
glPushMatrix();
glTranslatef(-1.0F+2*i,-2.0F,-amp);
flecheEnVolume(-nx,0.0F,nz,0.1F,0.25F,0.02F);
glPopMatrix();
glPushMatrix();
glTranslatef(-2.0F+2*i,2.0F,amp);
flecheEnVolume(-nx,0.0F,nz,0.1F,0.25F,0.02F);
glPopMatrix();
glPushMatrix();
glTranslatef(-2.0F+2*i,-2.0F,amp);
flecheEnVolume(-nx,0.0F,nz,0.1F,0.25F,0.02F);
glPopMatrix(); } }
glPopMatrix();
}
void display(void) {
GLfloat pos[] = { -1.0F,0.0F,1.0F,0.0F };
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
glPushMatrix();
manipulateurSouris();
manipulateurClavier();
glLightfv(GL_LIGHT0,GL_POSITION,pos);
if ( mode == 0 )
scene1();
else
scene2();
glPopMatrix();
glFlush();
glutSwapBuffers();
}
void myinit(void) {
glClearColor(0.8F,0.8F,1.0F,1.0F);
glEnable(GL_DEPTH_TEST);
glEnable(GL_AUTO_NORMAL);
glEnable(GL_NORMALIZE);
initlights();
}
void key(unsigned char key,int x,int y) {
if ( keyManipulateur(key,x,y) )
glutPostRedisplay();
else
switch ( key ) {
case 43 : amp += 0.02F;
glutPostRedisplay();
break;
case 45 : amp -= 0.02F;
glutPostRedisplay();
break;
case 0x0D : aff = (aff+1)%2;
glutPostRedisplay();
break;
case ' ' : mode = (mode+1)%2;
glutPostRedisplay();
break; }
}
int main(int argc,char **argv) {
glutInit(&argc,argv);
glutInitDisplayMode(GLUT_RGBA|GLUT_DEPTH|GLUT_DOUBLE);
glutInitWindowSize(300,200);
glutInitWindowPosition(50,50);
glutCreateWindow("Problème avec Gouraud");
myinit();
creationMenuBasique();
setParametresOrthoBasique(-3.2F,3.2F,-3.2F,3.2F,-50.0,50.0);
setManipulateurDistance(1.0F);
glutReshapeFunc(reshapeOrthoBasique);
glutKeyboardFunc(key);
glutSpecialFunc(specialBasique);
glutMotionFunc(motionBasique);
glutMouseFunc(sourisBasique);
glutDisplayFunc(display);
glutMainLoop();
return(0);
}
RETOUR