#include <stdio.h>

#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 GLint fogMode;
static float z = 2.0F;
static float dz = 0.1F;
static int fog = 1;

void myinit(void) {
  GLfloat position[] = { 0.0,3.0,3.0,0.0 };
  GLfloat local_view[] = { 0.0 };
  glEnable(GL_DEPTH_TEST);
  glDepthFunc(GL_LESS);
  glLightfv(GL_LIGHT0,GL_POSITION,position);
  glLightModelfv(GL_LIGHT_MODEL_LOCAL_VIEWER,local_view);
  glFrontFace(GL_CW);
  glEnable(GL_LIGHTING);
  glEnable(GL_LIGHT0);
  glEnable(GL_AUTO_NORMAL);
  glEnable(GL_NORMALIZE);
  fogMode = GL_EXP;
  glFogi(GL_FOG_MODE,fogMode);
  glFogfv(GL_FOG_COLOR,couleurGrisMoyen());
  glFogf(GL_FOG_DENSITY,0.3F);
  glHint(GL_FOG_HINT,GL_DONT_CARE);
  glClearColor(0.5,0.5,0.5,1.0);
}

void renderTeapot(GLfloat x,GLfloat y,GLfloat z) {
  glPushMatrix();
  glTranslatef(x,y,z);
  manipulateurSouris();
  manipulateurClavier();
  glMaterialfv(GL_FRONT,GL_AMBIENT,newCouleur(0.2F,0.0F,0.0F,1.0F));
  glMaterialfv(GL_FRONT,GL_DIFFUSE,newCouleur(0.6F,0.5F,0.0F,1.0F));
  glMaterialfv(GL_FRONT,GL_SPECULAR,newCouleur(0.7F,0.6F,0.1F,1.0F));
  glMaterialf(GL_FRONT,GL_SHININESS,0.6F*128.0F);
  glColor4fv(couleurBlanc());
  glutSolidTeapot(1.0);
  glPopMatrix();
}

void idle(void) {
  z += dz;
  if ( z > 6.5F )
    dz *= -1.0F;
  if ( z < -10.0F )
    dz *= -1.0F;
  glutPostRedisplay();
}

void display(void) {
  glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
  if ( fog )
    glEnable(GL_FOG);
    else
    glDisable(GL_FOG);
  glPushMatrix();
  glTranslatef(0.0F,0.0F,-5.0F);
  renderTeapot(0.0,0.0,z);
  glPopMatrix();
  glFlush();
  glutSwapBuffers() ;
}

void key(unsigned char key,int x,int y) {
  if ( keyManipulateur(key,x,y) )
    glutPostRedisplay();
    else
    switch ( key ) {
      case ' '    : fog = 1 - fog;
                    glutPostRedisplay();
                    break;
      case 0x0D   : if ( fogMode == GL_EXP ) {
                      fogMode = GL_EXP2;
                      printf("Fog mode is GL_EXP2\n"); }
                      else
                      if ( fogMode == GL_EXP2 ) {
                        fogMode = GL_LINEAR;
                        printf("Fog mode is GL_LINEAR\n");
                        glFogf(GL_FOG_START,1.0);
                        glFogf(GL_FOG_END,5.0); }
                        else 
                        if ( fogMode == GL_LINEAR ) {
                          fogMode = GL_EXP;
                          printf("Fog mode is GL_EXP\n"); }
                        glFogi(GL_FOG_MODE,fogMode);
                    glutPostRedisplay();
                    break; }
}

void souris(int bouton,int etat,int x,int y) {
  if ( sourisManipulateur(bouton,etat,x,y) )
    glutPostRedisplay();
    else 
    if ( ( bouton == GLUT_LEFT_BUTTON ) && ( etat == GLUT_UP ) ) {
      if(fogMode == GL_EXP) {
        fogMode = GL_EXP2;
        printf("Fog mode is GL_EXP2\n"); }
        else
        if(fogMode == GL_EXP2) {
          fogMode = GL_LINEAR;
          printf("Fog mode is GL_LINEAR\n");
          glFogf(GL_FOG_START,1.0);
          glFogf(GL_FOG_END,5.0); }
          else 
          if(fogMode == GL_LINEAR) {
            fogMode = GL_EXP;
            printf("Fog mode is GL_EXP\n"); }
      glFogi(GL_FOG_MODE,fogMode);
      glutPostRedisplay(); }
}

int main(int argc,char **argv) {
  glutInit(&argc,argv);
  glutInitDisplayMode(GLUT_RGBA|GLUT_DEPTH|GLUT_DOUBLE);
  glutInitWindowSize(350,250); 
  glutInitWindowPosition(50,50); 
  glutCreateWindow("Brouillard"); 
  myinit(); 
  creationMenuBasique();
  setParametresPerspectiveBasique(43.0F,1.5F,1.0F,30.0F,0.0F,0.0F,-3.6F);
  setManipulateurDistance(5.0F);
  glutReshapeFunc(reshapePerspectiveBasique);
  glutKeyboardFunc(key);
  glutSpecialFunc(specialBasique);
  glutMotionFunc(motionBasique);
  glutMouseFunc(souris);
  glutIdleFunc(idle);
  glutDisplayFunc(display);
  glutMainLoop();
  return(0);}