/* Auteur: Nicolas JANEY */
/* nicolas.janey@univ-fcomte.fr */
/* Juillet 2001 */
/* Placage de texture sur une sphere */
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <GL/glut.h>
#include <GL/gl.h>
#include <GL/glu.h>
#include "ModuleManipulateur.h"
#include "ModuleMenus.h"
#include "ModuleReshape.h"
#ifndef M_PI
#define M_PI 3.14159265358979323846264338327950288
#endif
#define LI 64
#define LH 64
struct coord3D {
float x;
float y;
float z; } ;
struct coord2D {
float x;
float y; } ;
GLubyte image[LI][LH][3];
void makeImage(void) {
int i,j,c;
for( i = 0 ; i < LI ; i++ ) {
for( j = 0 ; j < LH ; j++ ) {
c =(((i&0x4)==0)^((j&0x4)==0))*255;
image[i][j][0] =(GLubyte) c;
image[i][j][1] =(GLubyte) c;
image[i][j][2] =(GLubyte) c; } }
}
void myinit(void) {
glClearColor(0.8F,0.8F,0.8F,0.0);
glEnable(GL_DEPTH_TEST);
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
glDepthFunc(GL_LESS);
makeImage();
glPixelStorei(GL_UNPACK_ALIGNMENT,1);
glTexImage2D(GL_TEXTURE_2D,0,3,LI,LH,0,GL_RGB,GL_UNSIGNED_BYTE,&image[0][0][0]);
glTexParameterf(GL_TEXTURE_2D,GL_TEXTURE_WRAP_S,GL_CLAMP);
glTexParameterf(GL_TEXTURE_2D,GL_TEXTURE_WRAP_T,GL_CLAMP);
glTexParameterf(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_NEAREST);
glTexParameterf(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_NEAREST);
glEnable(GL_TEXTURE_2D);
glShadeModel(GL_SMOOTH);
glEnable(GL_AUTO_NORMAL);
glEnable(GL_NORMALIZE);
}
void solidSphere(double r,int lat,int lon) {
int npt = 2 + (lat-1)*lon;
int ntx = (lat+1)*(lon+1);
coord3D *pts =(coord3D *) calloc(npt,sizeof(coord3D));
coord2D *tex =(coord2D *) calloc(ntx,sizeof(coord2D));
pts[0].x = 0.0f;
pts[0].y = 0.0f;
pts[0].z = 1.0f;
pts[1].x = 0.0f;
pts[1].y = 0.0f;
pts[1].z = -1.0f;
int n = 0 ;
int i,j ;
for ( j = 0 ; j < lat+1 ; j++ ) {
for ( i = 0 ; i < lon+1 ; i++ ) {
tex[n].x =(float) i/lon;
tex[n].y =(float) j/lat;
n++; } }
n = 2 ;
for ( j = 0 ; j < (lat-1) ; j++ ) {
double aa = M_PI/2.0-(j+1)*M_PI/lat;
double c = cos(aa);
double s = sin(aa);
for ( i = 0 ; i < lon ; i++ ) {
double a = i*M_PI*2.0/lon;
pts[n].x = c*cos(a);
pts[n].y = c*sin(a);
pts[n].z = s;
n++; } }
glBegin(GL_QUADS);
for ( i = 0 ; i < lon ; i++ ) {
glTexCoord2fv((float *) &tex[i]);
glNormal3fv((float *) &pts[0]);
glVertex3fv((float *) &pts[0]);
glTexCoord2fv((float *) &tex[i+lon+1]);
glNormal3fv((float *) &pts[2+i]);
glVertex3fv((float *) &pts[2+i]);
glTexCoord2fv((float *) &tex[i+lon+2]);
glNormal3fv((float *) &pts[2+(i+1)%lon]);
glVertex3fv((float *) &pts[2+(i+1)%lon]);
glTexCoord2fv((float *) &tex[i+1]);
glNormal3fv((float *) &pts[0]);
glVertex3fv((float *) &pts[0]); }
for ( j = 0 ; j < lat-2 ; j++ ) {
for ( i = 0 ; i < lon ; i++ ) {
glTexCoord2fv((float *) &tex[i+(j+1)*(lon+1)]);
glNormal3fv((float *) &pts[2+i+j*lon]);
glVertex3fv((float *) &pts[2+i+j*lon]);
glTexCoord2fv((float *) &tex[i+1+(j+1)*(lon+1)]);
glNormal3fv((float *) &pts[2+(i+1)%lon+j*lon]);
glVertex3fv((float *) &pts[2+(i+1)%lon+j*lon]);
glTexCoord2fv((float *) &tex[i+1+(j+2)*(lon+1)]);
glNormal3fv((float *) &pts[2+(i+1)%lon+(j+1)*lon]);
glVertex3fv((float *) &pts[2+(i+1)%lon+(j+1)*lon]);
glTexCoord2fv((float *) &tex[i+(j+2)*(lon+1)]);
glNormal3fv((float *) &pts[2+i+(j+1)*lon]);
glVertex3fv((float *) &pts[2+i+(j+1)*lon]); } }
for ( i = 0 ; i < lon ; i++ ) {
glTexCoord2fv((float *) &tex[i+lat*(lon+1)]);
glNormal3fv((float *) &pts[1]);
glVertex3fv((float *) &pts[1]);
glTexCoord2fv((float *) &tex[i+(lat-1)*(lon+1)]);
glNormal3fv((float *) &pts[2+(lat-2)*lon+i]);
glVertex3fv((float *) &pts[2+(lat-2)*lon+i]);
glTexCoord2fv((float *) &tex[i+1+(lat-1)*(lon+1)]);
glNormal3fv((float *) &pts[2+(lat-2)*lon+(i+1)%lon]);
glVertex3fv((float *) &pts[2+(lat-2)*lon+(i+1)%lon]);
glTexCoord2fv((float *) &tex[i+1+lat*(lon+1)]);
glNormal3fv((float *) &pts[1]);
glVertex3fv((float *) &pts[1]); }
glEnd();
free(tex);
free(pts);
}
void display(void) {
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
glPushMatrix();
manipulateurSouris();
manipulateurClavier();
solidSphere(1.0,18,36);
glPopMatrix();
glFlush();
glutSwapBuffers();
}
int main(int argc,char **argv) {
glutInit(&argc,argv);
glutInitDisplayMode(GLUT_RGBA|GLUT_DEPTH|GLUT_DOUBLE);
glutInitWindowSize(300,200);
glutInitWindowPosition(50,50);
glutCreateWindow("Une sphere avec texture");
myinit();
creationMenuBasique();
setParametresPerspectiveBasique(43.0F,1.5F,1.0F,30.0F,0.0F,0.0F,-3.6F);
setManipulateurDistance(3.6F);
glutReshapeFunc(reshapePerspectiveBasique);
glutKeyboardFunc(keyBasique);
glutSpecialFunc(specialBasique);
glutMotionFunc(motionBasique);
glutMouseFunc(sourisBasique);
glutDisplayFunc(display);
glutMainLoop();
return(0);
}
RETOUR