/* Auteur: Nicolas JANEY          */
/* nicolas.janey@univ-fcomte.fr   */
/* Avril 2001                     */
/* L'animation d'une lumiere      */
/* sur un cube composé de speres  */

#include <stdlib.h>

#include <GL/glut.h>
#include <GL/gl.h>
#include <GL/glu.h>

#include "ModuleCouleurs.h"
#include "ModuleMenus.h"
#include "ModuleReshape.h"
#include "ModuleManipulateur.h"

static float angle = 0.0F ;
static int nsp = 2 ;

void myinit(void) {
  GLfloat shininess[] = { 50.0 };
  glMaterialfv(GL_FRONT,GL_AMBIENT,couleurNoir());
  glMaterialfv(GL_FRONT,GL_SHININESS,shininess);
  glLightfv(GL_LIGHT0,GL_DIFFUSE,couleurBlanc());
  glLightfv(GL_LIGHT0,GL_DIFFUSE,couleurBlanc());
  glEnable(GL_LIGHT0);
  glEnable(GL_LIGHTING);
  glEnable(GL_NORMALIZE);
  glDepthFunc(GL_LESS);
  glEnable(GL_DEPTH_TEST);
}

void scene(void) {
  glPushMatrix() ;
  glScalef(15.0f/nsp,15.0f/nsp,15.0f/nsp);
  for ( int i = 0 ; i < nsp ; i++ )
    for ( int j = 0 ; j < nsp ; j++ )
      for ( int k = 0 ; k < nsp ; k++ ) {
        float x = -((nsp-1)*2.5) + i*5.0;
        float y = -((nsp-1)*2.5) + j*5.0;
        float z = -((nsp-1)*2.5) + k*5.0;
        float r =(float) i/(nsp-1);
        float v =(float) j/(nsp-1);
        float b =(float) k/(nsp-1);
        float coul[4] = { r,v,b,1.0 }; 
        glMaterialfv(GL_FRONT,GL_SPECULAR,coul);
        glMaterialfv(GL_FRONT,GL_DIFFUSE,coul);
        glPushMatrix();
        glTranslatef(x,y,z);
        glutSolidSphere(1.0,36/nsp+4,36/nsp+4);
        glPopMatrix(); }
  glPopMatrix() ;
}

void display(void) {
  glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
  glPushMatrix() ;
  manipulateurSouris();
  manipulateurClavier();
  glPushMatrix() ;
  glRotatef(angle,1.0F,0.0F,0.0F) ;
  GLfloat pos[4] = { 0.5F,1.0F,1.0F,0.0F };
  glLightfv(GL_LIGHT0,GL_POSITION,pos);
  glPopMatrix() ;
  scene();
  glPopMatrix() ;
  glFlush();
  glutSwapBuffers() ;
}

void idle(void) {
  angle += 5.0F ;
  glutPostRedisplay() ;
}

void key(unsigned char key,int x,int y) {
  if ( keyManipulateur(key,x,y) )
    glutPostRedisplay();
    else
    switch ( key) {
      case 45   : nsp--;
                  if ( nsp < 2 )
                    nsp = 2;
                  glutPostRedisplay();
                  break ;
      case 43   : nsp++;
                  glutPostRedisplay();
                  break ;
      case 0x1B : exit(0) ;
                  break; }
}

int main(int argc,char **argv) {
  glutInit(&argc,argv);
  glutInitDisplayMode(GLUT_RGBA|GLUT_DEPTH|GLUT_DOUBLE);
  glutInitWindowSize(300,300); 
  glutInitWindowPosition(50,50); 
  glutCreateWindow("Lumière mouvante"); 
  myinit(); 
  creationMenuBasique();
  setParametresOrthoBasique(-50.0,50.0,-50.0,50.0,-150.0,150.0);
  glutReshapeFunc(reshapeOrthoBasique);
  glutIdleFunc(idle);
  glutMotionFunc(motionBasique);
  glutMouseFunc(sourisBasique);
  setManipulateurDistance(1.0F);
  glutKeyboardFunc(key);
  glutDisplayFunc(display);
  glutMainLoop();
  return(0);
}