/* Auteur: Nicolas JANEY                */
/* nicolas.janey@univ-fcomte.fr         */
/* Mai 2002                             */
/* Examen de TD 2001-2002 : Question 1  */
/* Animation sur des spheres            */

#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 angle = 0;
static int inc = 1;

void myinit(void) {
  glMaterialfv(GL_FRONT,GL_DIFFUSE,couleurBlanc());
  glMaterialfv(GL_FRONT,GL_SPECULAR,couleurNoir());
  glMaterialfv(GL_FRONT,GL_AMBIENT,couleurNoir());
  glLightfv(GL_LIGHT0,GL_DIFFUSE,couleurBlanc());
  glLightfv(GL_LIGHT1,GL_DIFFUSE,couleurRouge());
  float dir0[4] = { 0.0F,0.0F,1.0F,0.0F };
  glLightfv(GL_LIGHT0,GL_POSITION,dir0);
  float pos1[4] = { 0.0F,0.0F,5.0F,1.0F };
  glLightfv(GL_LIGHT1,GL_POSITION,pos1);
  glLightf(GL_LIGHT1,GL_SPOT_CUTOFF,50.0F);
  glEnable(GL_LIGHT0);
  glEnable(GL_LIGHT1);
  glEnable(GL_LIGHTING);
  glDepthFunc(GL_LESS);
  glEnable(GL_DEPTH_TEST);
  glEnable(GL_AUTO_NORMAL);
  glEnable(GL_NORMALIZE);
  glEnable(GL_CULL_FACE);
}

void display(void) {
  GLfloat light0_position[] = { 1.0,1.0,1.0,0.0 };
  glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
  glPushMatrix() ;
//  manipulateurSouris();
//  manipulateurClavier();
  glPushMatrix() ;
//  float dir0[4] = { 0.0F,0.0F,1.0F,0.0F };
//  glLightfv(GL_LIGHT0,GL_POSITION,dir0);
//  float pos1[4] = { 0.0F,0.0F,5.0F,1.0F };
//  glLightfv(GL_LIGHT1,GL_POSITION,pos1);
  float dir1[3] = { 0.0F,0.0F,-1.0F };
  glRotatef(angle,0.0F,1.0F,0.0F);
  glLightfv(GL_LIGHT1,GL_SPOT_DIRECTION,dir1);
  glPopMatrix() ;
  for ( int i = -10 ; i <= 10 ; i += 2 ) 
    for ( int j = -10 ; j <= 10 ; j += 2 ) {
      glPushMatrix() ;  
      glTranslatef(i,j,0.0F); 
      glutSolidSphere(1.0,18,18);
      glPopMatrix() ; }
  glPopMatrix() ;
  glFlush();
  glutSwapBuffers() ;
}

void idle(void) {
  angle += inc;
  if ( ( angle >= 40 ) || ( angle <= -40 ) )
    inc = -inc;
  glutPostRedisplay() ;
}

int main(int argc,char **argv) {
  glutInit(&argc,argv);
  glutInitDisplayMode(GLUT_RGBA|GLUT_DEPTH|GLUT_DOUBLE);
  glutInitWindowSize(300,300); 
  glutInitWindowPosition(50,50); 
  glutCreateWindow("Animation"); 
  myinit(); 
  creationMenuBasique();
  setParametresOrthoBasique(-15.0,15.0,-15.0,15.0,-35.0,35.0);
  setManipulateurDistance(1.0F);
  glutReshapeFunc(reshapeOrthoBasique);
  glutKeyboardFunc(keyBasique);
  glutSpecialFunc(specialBasique);
  glutMotionFunc(motionBasique);
  glutMouseFunc(sourisBasique);
  glutIdleFunc(idle);
  glutDisplayFunc(display);
  glutMainLoop();
  return(0);
}