Le source : Texture3DSphere.cpp
/* Auteur: Nicolas JANEY */
/* nicolas.janey@univ-fcomte.fr */
/* Juillet 2001 */
/* Placage de texture 3D sur une sphere */
/* ou un cube */
#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 TLI 16
#define TLH 16
#define TLL 16
struct coord3D {
float x;
float y;
float z; } ;
struct coord2D {
float x;
float y; } ;
GLubyte image3Dx1[TLI][TLH][TLL][3];
GLubyte image3Dx2[TLI][TLH][TLL][3];
GLubyte image3Dx3[TLI][TLH][TLL][3];
int aff = 0;
int obj = 0;
void makeImage3Dx1(void) {
int i,j,k,c;
for( i = 0 ; i < TLI ; i++ ) {
for( j = 0 ; j < TLH ; j++ ) {
for( k = 0 ; k < TLL ; k++ ) {
c =(((i&0x4)==0))*255;
image3Dx1[i][j][k][0] =(GLubyte) c;
image3Dx1[i][j][k][1] =(GLubyte) c;
image3Dx1[i][j][k][2] =(GLubyte) c; } } }
}
void makeImage3Dx2(void) {
int i,j,k,c;
for( i = 0 ; i < TLI ; i++ ) {
for( j = 0 ; j < TLH ; j++ ) {
for( k = 0 ; k < TLL ; k++ ) {
c =(((i&0x4)==0)^((j&0x4)==0))*255;
image3Dx2[i][j][k][0] =(GLubyte) c;
image3Dx2[i][j][k][1] =(GLubyte) c;
image3Dx2[i][j][k][2] =(GLubyte) c; } } }
}
void makeImage3Dx3(void) {
int i,j,k,c;
for( i = 0 ; i < TLI ; i++ ) {
for( j = 0 ; j < TLH ; j++ ) {
for( k = 0 ; k < TLL ; k++ ) {
c =(((i&0x4)==0)^((j&0x4)==0)^((k&0x4)==0))*255;
image3Dx3[i][j][k][0] =(GLubyte) c;
image3Dx3[i][j][k][1] =(GLubyte) c;
image3Dx3[i][j][k][2] =(GLubyte) c; } } }
}
void myinit(void) {
glClearColor(0.8,0.8,0.8,0.0);
glEnable(GL_DEPTH_TEST);
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
glDepthFunc(GL_LESS);
makeImage3Dx1();
makeImage3Dx2();
makeImage3Dx3();
glPixelStorei(GL_UNPACK_ALIGNMENT,1);
glTexImage3D(GL_TEXTURE_3D,0,3,
TLI,TLH,TLL,
0,GL_RGB,
GL_UNSIGNED_BYTE,
&image3Dx1[0][0][0][0]);
glTexParameterf(GL_TEXTURE_3D,GL_TEXTURE_WRAP_S,GL_REPEAT);
glTexParameterf(GL_TEXTURE_3D,GL_TEXTURE_WRAP_T,GL_REPEAT);
glTexParameterf(GL_TEXTURE_3D,GL_TEXTURE_WRAP_R,GL_REPEAT);
glTexParameterf(GL_TEXTURE_3D,GL_TEXTURE_MAG_FILTER,GL_NEAREST);
glTexParameterf(GL_TEXTURE_3D,GL_TEXTURE_MIN_FILTER,GL_NEAREST);
glEnable(GL_TEXTURE_3D);
glShadeModel(GL_SMOOTH);
glEnable(GL_AUTO_NORMAL);
glEnable(GL_NORMALIZE);
}
void solidSphere(int lat,int lon) {
int npt = 2 + (lat-1)*lon;
coord3D *pts =(coord3D *) calloc(npt,sizeof(coord3D));
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 i,j ;
int 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++ ) {
glTexCoord3fv((float *) &pts[0]);
glNormal3fv((float *) &pts[0]);
glVertex3fv((float *) &pts[0]);
glTexCoord3fv((float *) &pts[2+i]);
glNormal3fv((float *) &pts[2+i]);
glVertex3fv((float *) &pts[2+i]);
glTexCoord3fv((float *) &pts[2+(i+1)%lon]);
glNormal3fv((float *) &pts[2+(i+1)%lon]);
glVertex3fv((float *) &pts[2+(i+1)%lon]);
glTexCoord3fv((float *) &pts[0]);
glNormal3fv((float *) &pts[0]);
glVertex3fv((float *) &pts[0]); }
for ( j = 0 ; j < lat-2 ; j++ ) {
for ( i = 0 ; i < lon ; i++ ) {
glTexCoord3fv((float *) &pts[2+i+j*lon]);
glNormal3fv((float *) &pts[2+i+j*lon]);
glVertex3fv((float *) &pts[2+i+j*lon]);
glTexCoord3fv((float *) &pts[2+(i+1)%lon+j*lon]);
glNormal3fv((float *) &pts[2+(i+1)%lon+j*lon]);
glVertex3fv((float *) &pts[2+(i+1)%lon+j*lon]);
glTexCoord3fv((float *) &pts[2+(i+1)%lon+(j+1)*lon]);
glNormal3fv((float *) &pts[2+(i+1)%lon+(j+1)*lon]);
glVertex3fv((float *) &pts[2+(i+1)%lon+(j+1)*lon]);
glTexCoord3fv((float *) &pts[2+i+(j+1)*lon]);
glNormal3fv((float *) &pts[2+i+(j+1)*lon]);
glVertex3fv((float *) &pts[2+i+(j+1)*lon]); } }
for ( i = 0 ; i < lon ; i++ ) {
glTexCoord3fv((float *) &pts[1]);
glNormal3fv((float *) &pts[1]);
glVertex3fv((float *) &pts[1]);
glTexCoord3fv((float *) &pts[2+(lat-2)*lon+i]);
glNormal3fv((float *) &pts[2+(lat-2)*lon+i]);
glVertex3fv((float *) &pts[2+(lat-2)*lon+i]);
glTexCoord3fv((float *) &pts[2+(lat-2)*lon+(i+1)%lon]);
glNormal3fv((float *) &pts[2+(lat-2)*lon+(i+1)%lon]);
glVertex3fv((float *) &pts[2+(lat-2)*lon+(i+1)%lon]);
glTexCoord3fv((float *) &pts[1]);
glNormal3fv((float *) &pts[1]);
glVertex3fv((float *) &pts[1]); }
glEnd();
free(pts);
}
void solidCube(void) {
glBegin(GL_QUADS);
glNormal3f(0.0F,0.0F,1.0F);
glTexCoord3f(0.99F,0.99F,0.99F);
glVertex3f(0.99F,0.99F,0.99F);
glTexCoord3f(-0.99F,0.99F,0.99F);
glVertex3f(-0.99F,0.99F,0.99F);
glTexCoord3f(-0.99F,-0.99F,0.99F);
glVertex3f(-0.99F,-0.99F,0.99F);
glTexCoord3f(0.99F,-0.99F,0.99F);
glVertex3f(0.99F,-0.99F,0.99F);
glNormal3f(0.0F,0.0F,-1.0F);
glTexCoord3f(0.99F,0.99F,-0.99F);
glVertex3f(0.99F,0.99F,-0.99F);
glTexCoord3f(-0.99F,0.99F,-0.99F);
glVertex3f(-0.99F,0.99F,-0.99F);
glTexCoord3f(-0.99F,-0.99F,-0.99F);
glVertex3f(-0.99F,-0.99F,-0.99F);
glTexCoord3f(0.99F,-0.99F,-0.99F);
glVertex3f(0.99F,-0.99F,-0.99F);
glNormal3f(0.0F,1.0F,0.0F);
glTexCoord3f(0.99F,0.99F,0.99F);
glVertex3f(0.99F,0.99F,0.99F);
glTexCoord3f(-0.99F,0.99F,0.99F);
glVertex3f(-0.99F,0.99F,0.99F);
glTexCoord3f(-0.99F,0.99F,-0.99F);
glVertex3f(-0.99F,0.99F,-0.99F);
glTexCoord3f(0.99F,0.99F,-0.99F);
glVertex3f(0.99F,0.99F,-0.99F);
glNormal3f(0.0F,-1.0F,0.0F);
glTexCoord3f(0.99F,-0.99F,0.99F);
glVertex3f(0.99F,-0.99F,0.99F);
glTexCoord3f(-0.99F,-0.99F,0.99F);
glVertex3f(-0.99F,-0.99F,0.99F);
glTexCoord3f(-0.99F,-0.99F,-0.99F);
glVertex3f(-0.99F,-0.99F,-0.99F);
glTexCoord3f(0.99F,-0.99F,-0.99F);
glVertex3f(0.99F,-0.99F,-0.99F);
glNormal3f(1.0F,0.0F,0.0F);
glTexCoord3f(0.99F,0.99F,0.99F);
glVertex3f(0.99F,0.99F,0.99F);
glTexCoord3f(0.99F,-0.99F,0.99F);
glVertex3f(0.99F,-0.99F,0.99F);
glTexCoord3f(0.99F,-0.99F,-0.99F);
glVertex3f(0.99F,-0.99F,-0.99F);
glTexCoord3f(0.99F,0.99F,-0.99F);
glVertex3f(0.99F,0.99F,-0.99F);
glNormal3f(-1.0F,0.0F,0.0F);
glTexCoord3f(-0.99F,0.99F,0.99F);
glVertex3f(-0.99F,0.99F,0.99F);
glTexCoord3f(-0.99F,-0.99F,0.99F);
glVertex3f(-0.99F,-0.99F,0.99F);
glTexCoord3f(-0.99F,-0.99F,-0.99F);
glVertex3f(-0.99F,-0.99F,-0.99F);
glTexCoord3f(-0.99F,0.99F,-0.99F);
glVertex3f(-0.99F,0.99F,-0.99F);
glEnd();
}
void display(void) {
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
glPushMatrix();
manipulateurSouris();
manipulateurClavier();
switch(obj) {
case 0 : solidSphere(18,36);
break;
case 1 : solidCube(); }
glPopMatrix();
glFlush();
glutSwapBuffers();
}
void key(unsigned char key,int x,int y) {
if ( keyManipulateur(key,x,y) )
glutPostRedisplay();
else
switch ( key ) {
case ' ' : obj =(obj+1)%2 ;
glutPostRedisplay();
break;
case 0x0D : aff =(aff+1)%3 ;
switch (aff) {
case 0 : glTexImage3D(GL_TEXTURE_3D,0,3,
TLI,TLH,TLL,
0,
GL_RGB,GL_UNSIGNED_BYTE,
&image3Dx1[0][0][0][0]);
break;
case 1 : glTexImage3D(GL_TEXTURE_3D,0,3,
TLI,TLH,TLL,
0,
GL_RGB,GL_UNSIGNED_BYTE,
&image3Dx2[0][0][0][0]);
break;
case 2 : glTexImage3D(GL_TEXTURE_3D,0,3,
TLI,TLH,TLL,
0,
GL_RGB,GL_UNSIGNED_BYTE,
&image3Dx3[0][0][0][0]);
break; }
glutPostRedisplay();
break; }
}
void main(void) {
glutInitDisplayMode(GLUT_RGBA|GLUT_DEPTH|GLUT_DOUBLE);
glutInitWindowSize(300,200);
glutInitWindowPosition(50,50);
glutCreateWindow("Une sphere ou un cube avec texture 3D");
myinit();
creationMenuBasique();
setParametresOrthoBasique(-1.5,1.5,-1.5,1.5,-500.0,500.0);
setManipulateurDistance(1.0F);
setManipulateurClavierAngle(40.0F,140.0F,0.0F) ;
glutReshapeFunc(reshapeOrthoBasique);
glutKeyboardFunc(key);
glutSpecialFunc(specialBasique);
glutMotionFunc(motionBasique);
glutMouseFunc(sourisBasique);
glutDisplayFunc(display);
glutMainLoop();
}
RETOUR