Le source : TD-CylindreEtCone.cpp
/* Auteur: Nicolas JANEY */
/* nicolas.janey@univ-fcomte.fr */
/* Avril 2001 */
/* Fonctions de dessin de cylindre et cone */
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <GL/glut.h>
#include <GL/gl.h>
#include <GL/glu.h>
#include "ModuleCouleurs.h"
#include "ModuleManipulateur.h"
#include "ModuleMenus.h"
#include "ModuleReshape.h"
static int np = 40;
void cylindre(double h,double r,int n) {
double *cs =(double *) calloc(n+1,sizeof(double)) ;
double *sn =(double *) calloc(n+1,sizeof(double)) ;
double *ncs =(double *) calloc(n+1,sizeof(double)) ;
double *nsn =(double *) calloc(n+1,sizeof(double)) ;
cs[0] = cs[n] = r ;
sn[0] = sn[n] = 0.0 ;
ncs[0] = ncs[n] = 1.0 ;
nsn[0] = nsn[n] = 0.0 ;
int i;
for ( i = 1 ; i < n ; i++ ) {
double a = 3.14159/n*2*i ;
ncs[i] = cos(a) ;
nsn[i] = sin(a) ;
cs[i] = r*ncs[i] ;
sn[i] = r*nsn[i] ; }
glBegin(GL_POLYGON) ;
glNormal3f(0.0,1.0,0.0) ;
for ( i = 0 ; i < n ; i++ ) {
glVertex3d(cs[i],h/2,sn[i]); }
glEnd() ;
glBegin(GL_POLYGON) ;
glNormal3f(0.0,-1.0,0.0) ;
for ( i = 0 ; i < n ; i++ ) {
glVertex3d(cs[i],-h/2,sn[i]); }
glEnd() ;
glBegin(GL_QUADS) ;
for ( i = 0 ; i < n ; i++ ) {
glNormal3d(ncs[i],0.0,nsn[i]) ;
glVertex3d(cs[i],h/2,sn[i]);
glNormal3d(ncs[i+1],0.0,nsn[i+1]) ;
glVertex3d(cs[i+1],h/2,sn[i+1]);
glVertex3d(cs[i+1],-h/2,sn[i+1]);
glNormal3d(ncs[i],0.0,nsn[i]) ;
glVertex3d(cs[i],-h/2,sn[i]); }
glEnd() ;
free(sn) ;
free(cs) ;
free(nsn) ;
free(ncs) ;
}
void cone(double h,double r,int n) {
double *cs =(double *) calloc(n+1,sizeof(double)) ;
double *sn =(double *) calloc(n+1,sizeof(double)) ;
double *ncs =(double *) calloc(n+1,sizeof(double)) ;
double *nsn =(double *) calloc(n+1,sizeof(double)) ;
cs[0] = cs[n] = r ;
sn[0] = sn[n] = 0.0 ;
ncs[0] = ncs[n] = 1.0 ;
nsn[0] = nsn[n] = 0.0 ;
int i;
for ( i = 1 ; i < n ; i++ ) {
double a = 3.14159/n*2*i ;
ncs[i] = cos(a) ;
nsn[i] = sin(a) ;
cs[i] = r*ncs[i] ;
sn[i] = r*nsn[i] ; }
glBegin(GL_POLYGON) ;
glNormal3f(0.0,-1.0,0.0) ;
for ( i = 0 ; i < n ; i++ ) {
glVertex3d(cs[i],-h/2,sn[i]); }
glEnd() ;
glBegin(GL_QUADS) ;
for ( i = 0 ; i < n ; i++ ) {
glNormal3d(ncs[i],0.0,nsn[i]) ;
glVertex3d(0,h/2,0);
glNormal3d(ncs[i+1],0.0,nsn[i+1]) ;
glVertex3d(0,h/2,0);
glVertex3d(cs[i+1],-h/2,sn[i+1]);
glNormal3d(ncs[i],0.0,nsn[i]) ;
glVertex3d(cs[i],-h/2,sn[i]); }
glEnd() ;
/* glBegin(GL_TRIANGLES) ;
for ( i = 0 ; i < n ; i++ ) {
glNormal3d(ncs[i],0.0,nsn[i]) ;
glVertex3d(0.0,h/2,0.0);
glNormal3d(ncs[i],0.0,nsn[i]) ;
glVertex3d(cs[i],-h/2,sn[i]);
glNormal3d(ncs[i+1],0.0,nsn[i+1]) ;
glVertex3d(cs[i+1],-h/2,sn[i+1]);
}*/
glEnd() ;
free(sn) ;
free(cs) ;
free(nsn) ;
free(ncs) ;
}
void display(void) {
glClearColor(0.5F,0.5F,0.5F,0.0F);
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
glPushMatrix();
manipulateurSouris();
manipulateurClavier();
glMaterialfv(GL_FRONT_AND_BACK,GL_DIFFUSE,couleurBleu()) ;
glMaterialfv(GL_FRONT_AND_BACK,GL_SPECULAR,couleurJaune()) ;
glMaterialf(GL_FRONT_AND_BACK,GL_SHININESS,90) ;
glTranslatef(0.0F,0.7F,0.0F) ;
cylindre(0.8,0.4,np) ;
glMaterialfv(GL_FRONT_AND_BACK,GL_DIFFUSE,couleurRouge()) ;
glMaterialfv(GL_FRONT_AND_BACK,GL_SPECULAR,couleurJaune()) ;
glMaterialf(GL_FRONT_AND_BACK,GL_SHININESS,90) ;
glTranslatef(0.0F,-1.1F,0.0F) ;
cone(1.4,0.4,np) ;
glPopMatrix();
glFlush();
glutSwapBuffers();
}
void myinit(void) {
glShadeModel(GL_SMOOTH);
glEnable(GL_AUTO_NORMAL);
glEnable(GL_NORMALIZE);
glEnable(GL_DEPTH_TEST);
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
glLightfv(GL_LIGHT0,GL_SPECULAR,couleurJauneClair()) ;
}
void key(unsigned char key,int x,int y) {
if ( keyManipulateur(key,x,y) )
glutPostRedisplay();
else
switch ( key ) {
case 43 : np++ ;
glutPostRedisplay();
break ;
case 45 : np-- ;
if ( np < 3 )
np = 3 ;
glutPostRedisplay();
break ; }
}
int main(int argc,char **argv) {
glutInit(&argc,argv);
glutInitDisplayMode(GLUT_RGBA|GLUT_DEPTH|GLUT_DOUBLE);
glutInitWindowSize(300,300);
glutInitWindowPosition(50,50);
glutCreateWindow("Cylindre et cone");
myinit();
creationMenuBasique();
setParametresOrthoBasique(-1.3F,1.3F,-1.3F,1.3F,-500.0,500.0);
setManipulateurDistance(1.0F);
glutReshapeFunc(reshapeOrthoBasique);
glutKeyboardFunc(key);
glutSpecialFunc(specialBasique);
glutMotionFunc(motionBasique);
glutMouseFunc(sourisBasique);
glutDisplayFunc(display);
glutMainLoop();
return(0);
}
RETOUR