/* Auteur: Nicolas JANEY         */
/* nicolas.janey@univ-fcomte.fr  */
/* Avril 2001                    */
/* Une animation par survol      */
/* d'un tapis de 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 float z = 0.0F ;
static float dz = 1.0F ;

void myinit(void) {
  GLfloat shinines[] = { 50.0F };
  GLfloat l_pos[] = { 1.0F,1.0F,1.0F,0.0F };
  glClearColor(0.5F,0.5F,1.0F,1.0F) ;
  glMaterialfv(GL_FRONT,GL_SPECULAR,couleurBlanc());
  glMaterialfv(GL_FRONT,GL_SHININESS,shinines);
  glLightfv(GL_LIGHT0,GL_POSITION,l_pos);
  glEnable(GL_LIGHTING);
  glEnable(GL_LIGHT0);
  glDepthFunc(GL_LESS);
  glEnable(GL_DEPTH_TEST);
  glEnable(GL_AUTO_NORMAL);
  glEnable(GL_NORMALIZE);
}

void ligne(void) {
  glPushMatrix() ;
  glutSolidSphere(1.0,12,12) ;
  for ( int x = 0 ; x < 4 ; x++ ) {
    glTranslatef(5.0F,0.0F,0.0F) ;
    glutSolidSphere(1.0,12,12) ; }
  glPopMatrix() ;
}

void display(void) {
  glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
  glPushMatrix();
  glTranslatef(0.0F,-5.0F,0) ;
  manipulateurSouris();
  manipulateurClavier();
  glTranslatef(0.0F,0.0F,z) ;
  for ( int z = 0 ; z < 20 ; z++ ) {
    glPushMatrix();
    glTranslatef(-10.0F,0.0F,-5.0F*z) ;
    ligne() ;
    glPopMatrix(); }
  glPopMatrix();
  glFlush();
  glutSwapBuffers();
}

void idle(void) {
  z+= dz ;
  if ( ( z == 100 ) || ( z == -15 ) )
    dz = -dz ;
  glutPostRedisplay() ;
}

int main(int argc,char **argv) {
  glutInit(&argc,argv);
  glutInitDisplayMode(GLUT_RGBA|GLUT_DEPTH|GLUT_DOUBLE);
  glutInitWindowSize(250,250); 
  glutInitWindowPosition(50,50); 
  glutCreateWindow("Sphères blanches en survol"); 
  myinit(); 
  creationMenuBasique();
  setParametresFrustumBasique(-2.5F,2.5F,-2.5,2.5F,3.0F,1000.0F,0.0F,0.0F,0.0F);
  setManipulateurDistance(20.0F);
  glutReshapeFunc(reshapeFrustumBasique);
  glutKeyboardFunc(keyBasique);
  glutSpecialFunc(specialBasique);
  glutMotionFunc(motionBasique);
  glutMouseFunc(sourisBasique);
  glutIdleFunc(idle);
  glutDisplayFunc(display);
  glutMainLoop();
  return(0);
}