/* Auteur: Nicolas JANEY              */
/* nicolas.janey@univ-fcomte.fr       */
/* Septembre 2005                     */
/* Modelisation OpenGL d'une scene    */
/* composee de cubes                  */

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

#include <stdio.h>
#include <math.h>

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

static int aff = 0 ;
static int n = 7 ;

void myinit(void) {
  GLfloat light_position0[] = { 0.0F,0.0F,1.0F,0.0F };
  GLfloat light_position1[] = { 0.0F,0.0F,1.0F,0.0F };
  glLightfv(GL_LIGHT0,GL_AMBIENT,couleurNoir());
  glLightfv(GL_LIGHT0,GL_DIFFUSE,couleurBlanc());
  glLightfv(GL_LIGHT1,GL_DIFFUSE,couleurBlanc());
  glLightfv(GL_LIGHT0,GL_SPECULAR,couleurNoir());
  glLightfv(GL_LIGHT0,GL_POSITION,light_position0);
  glLightfv(GL_LIGHT1,GL_POSITION,light_position1);
  glEnable(GL_LIGHT0);
  glEnable(GL_LIGHT1);
  glDepthFunc(GL_LESS);
  glEnable(GL_AUTO_NORMAL);
  glEnable(GL_NORMALIZE);
  glEnable(GL_ALPHA_TEST);
  glEnable(GL_BLEND);
  glBlendFunc(GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA);
  glLightModeli(GL_LIGHT_MODEL_TWO_SIDE,GL_TRUE);
  setManipulateurClavierAngle(35.0F,20.0F,0.0F);
  glEnable(GL_DEPTH_TEST);
}

void planxOy(int aff) {
  glPushMatrix() ;
  if ( aff ) {
    glColor4fv(couleurGrisMoyen()) ;
    for ( int i = -100 ; i < 100 ; i++ ) {
      glBegin(GL_LINES) ;
      glVertex3f((float) i,200.0F,0.0F) ;
      glVertex3f((float) i,-200.0F,0.0F) ;
      glEnd() ;
      glBegin(GL_LINES) ;
      glVertex3f(200.0F,(float) i,0.0F) ;
      glVertex3f(-200.0F,(float) i,0.0F) ;
      glEnd() ; } }
  glPopMatrix() ;
}

void wireScene(int n) {
  glPushMatrix();
  for ( int i = 0 ; i < n ; i++ ) {
    glPushMatrix();
    glRotatef((360.0F*i)/n,0.0F,0.0F,1.0F);
    glTranslatef(3.0F,0.0F,0.0F);
    glutWireCube(1.0);
    glPopMatrix(); }
  glPopMatrix();
}

void solidScene(int n) {
  glEnable(GL_LIGHTING);
  glEnable(GL_CULL_FACE);
  glPushMatrix();
  for ( int i = 0 ; i < n ; i++ ) {
    glPushMatrix();
    glRotatef((360.0F*i)/n,0.0F,0.0F,1.0F);
    glTranslatef(3.0F,0.0F,0.0F);
    glutSolidCube(1.0);
    glPopMatrix(); }
  glPopMatrix();
  glDisable(GL_LIGHTING);
  glDisable(GL_CULL_FACE);
}

void scene(int n) {
  glPushMatrix();
  glPushMatrix();
  glColor4fv(couleurRouge()) ;
  wireScene(n);
  glPopMatrix();
  glPushMatrix();
  glMaterialfv(GL_FRONT,GL_DIFFUSE,couleurRouge(0.5F)) ;
  solidScene(n);
  glPopMatrix();
  glPopMatrix();
}

void display(void) {
  glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
  glPushMatrix() ;
  manipulateurSouris();
  manipulateurClavier();
  axes();
  planxOy(aff);
  scene(n);
  glPopMatrix();
  glFlush();
  glutSwapBuffers();
}

void key(unsigned char key,int x,int y) {
  if ( keyManipulateur(key,x,y) )
    glutPostRedisplay();
    else
    switch ( key ) {
      case 45   : n--;
                  if ( n < 1 )
                    n = 1;
                  glutPostRedisplay();
                  break;
      case 43   : n++;
                  glutPostRedisplay();
                  break;
      case 32   : aff = !aff ;
                  glutPostRedisplay();
                  break; }
}

int main(int argc,char **argv) {
  glutInit(&argc,argv);
  glutInitDisplayMode(GLUT_RGBA|GLUT_DEPTH|GLUT_DOUBLE);
  glutInitWindowSize(300,200); 
  glutInitWindowPosition(50,50); 
  glutCreateWindow("Polygone de n cubes");
  myinit(); 
  creationMenuBasique();
  setParametresOrthoBasique(-4.0,4.0,-4.0,4.0,-50.0,50.0);
  setManipulateurDistance(1.0F);
  glutReshapeFunc(reshapeOrthoBasique);
  glutKeyboardFunc(key);
  glutSpecialFunc(specialBasique);
  glutMotionFunc(motionBasique);
  glutMouseFunc(sourisBasique);
  glutDisplayFunc(display);
  glutMainLoop();
  return(0);
}