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

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

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

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

static int solutionTD = 0 ;
static int aff = 0 ;

void init(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 solidCube(float tx,float ty,float tz) {
  glPushMatrix();
  glScalef(tx,ty,tz);
  glutSolidCube(1.0);
  glPopMatrix();
}

void wireCube(float tx,float ty,float tz) {
  glPushMatrix();
  glScalef(tx,ty,tz);
  glutWireCube(1.0);
  glPopMatrix();
}

void wireElement() {
  glPushMatrix();
  glTranslatef(2.0F,0.0F,2.0F);
  wireCylindre(0.25F,3.0F,10,5);
  for ( int i = 0 ; i < 2 ; i++ ) {
    glTranslatef(0.0F,2.0F,0.0F);
    wireCube(1.0F,1.0F,1.0F);
    glRotatef(90.0F,0.0F,0.0F,1.0F);
    glTranslatef(0.0F,2.0F,0.0F);
    wireCylindre(0.25F,3.0F,10,5); }
  glPopMatrix();
}

void solidElement() {
  glPushMatrix();
  glTranslatef(2.0F,0.0F,2.0F);
  solidCylindre(0.25F,3.0F,10,5);
  for ( int i = 0 ; i < 2 ; i++ ) {
    glTranslatef(0.0F,2.0F,0.0F);
    solidCube(1.0F,1.0F,1.0F);
    glRotatef(90.0F,0.0F,0.0F,1.0F);
    glTranslatef(0.0F,2.0F,0.0F);
    solidCylindre(0.25F,3.0F,10,5); }
  glPopMatrix();
}

void wireScene() {
  glPushMatrix();
  glColor4fv(couleurRouge()) ;
  wireElement();
  for ( int i = 1 ; i < 4 ; i++ ) {
    glPushMatrix();
    glRotatef(90.0F*i,1.0F,0.0F,0.0F);
    switch (i) {
      case 1 : glColor4fv(couleurVert()) ;
               break;
      case 2 : glColor4fv(couleurBlanc()) ;
               break;
      case 3 : glColor4fv(couleurBleu()) ;
               break; }
    wireElement();
    glPopMatrix(); }
  glPopMatrix();
}

void solidScene() {
  glEnable(GL_LIGHTING);
  glEnable(GL_CULL_FACE);
  glPushMatrix();
  glMaterialfv(GL_FRONT,GL_DIFFUSE,couleurRouge(0.5F)) ;
  solidElement();
  for ( int i = 1 ; i < 4 ; i++ ) {
    glPushMatrix();
    glRotatef(90.0F*i,1.0F,0.0F,0.0F);
    switch (i) {
      case 1 : glMaterialfv(GL_FRONT,GL_DIFFUSE,couleurVert(0.5F)) ;
               break;
      case 2 : glMaterialfv(GL_FRONT,GL_DIFFUSE,couleurBlanc(0.5F)) ;
               break;
      case 3 : glMaterialfv(GL_FRONT,GL_DIFFUSE,couleurBleu(0.5F)) ;
               break; }
    solidElement();
    glPopMatrix(); }
  glPopMatrix();
  glDisable(GL_LIGHTING);
  glDisable(GL_CULL_FACE);
}

void scene(void) {
  glPushMatrix();
  planxOy(aff);
  axes();
  wireScene();
  solidScene();
  glPopMatrix();
}

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

void sceneTD() {
  glPushMatrix() ;
  wireElement();
  for ( int i = 1 ; i < 4 ; i++ ) {
    glPushMatrix();
    glRotatef(90.0F*i,1.0F,0.0F,0.0F);
    wireElement();
    glPopMatrix(); }
  glPopMatrix() ;
}

void displayTD(void) {
  glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
  glPushMatrix() ;
  manipulateurSouris();
  manipulateurClavier();
  glColor4fv(couleurBlanc()) ;
  axes();
  planxOy(aff);
  sceneTD();
  glPopMatrix();
  glFlush();
  glutSwapBuffers();
}

void key(unsigned char key,int x,int y) {
  if ( keyManipulateur(key,x,y) )
    glutPostRedisplay();
    else
    switch ( key ) {
      case 0x0D : solutionTD = !solutionTD;
                  glutDisplayFunc((solutionTD) ? displayTD : display);
                  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(250,250); 
  glutInitWindowPosition(50,50); 
  glutCreateWindow("8 cubes et 12 cylindres");
  init(); 
  creationMenuBasique();
  setParametresOrthoBasique(-4.5,4.5,-4.5,4.5,-50.0,50.0);
  setManipulateurDistance(1.0F);
  glutReshapeFunc(reshapeOrthoBasique);
  glutKeyboardFunc(key);
  glutSpecialFunc(specialBasique);
  glutMotionFunc(motionBasique);
  glutMouseFunc(sourisBasique);
  glutIdleFunc(idleBasique);
  glutDisplayFunc(display);
  glutMainLoop();
  return(0);
}