/* Auteur: Nicolas JANEY                      */
/* nicolas.janey@univ-fcomte.fr               */
/* Fevrier 2002                               */
/* Orientation du repere lie a l'observateur  */

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

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

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

static int f1;

void axes(float lx1,float lx2,float ly1,float ly2,float lz1,float lz2,char *x,char *y,char *z) {
  glPushAttrib(GL_LIGHTING);
  glEnable(GL_LIGHTING);
  setFont(GLUT_BITMAP_8_BY_13,CENTER);
  glMaterialfv(GL_FRONT,GL_DIFFUSE,couleurRouge());
  flecheEnVolume(1.0F,0.0F,0.0F,0.1F,0.3F,0.02F);
  glMaterialfv(GL_FRONT,GL_DIFFUSE,couleurVert());
  flecheEnVolume(0.0F,1.0F,0.0F,0.1F,0.3F,0.02F);
  glMaterialfv(GL_FRONT,GL_DIFFUSE,couleurBleu());
  flecheEnVolume(0.0F,0.0F,1.0F,0.1F,0.3F,0.02F);
  glDisable(GL_LIGHTING);
  glColor4fv(couleurRougeFonce());
  bitmapStringOutput(1.1F,-0.2F,0.0F,x);
  glColor4fv(couleurRougeFonce(0.5F));
  glBegin(GL_LINES);
  glVertex3f(lx1,0.0F,0.0F);
  glVertex3f(-lx2,0.0F,0.0F);
  glEnd();
  glColor4fv(couleurVertFonce());
  bitmapStringOutput(0.0F,1.2F,0.0F,y);
  glColor4fv(couleurVertFonce(0.5F));
  glBegin(GL_LINES);
  glVertex3f(0.0F,ly1,0.0F);
  glVertex3f(0.0F,-ly2,0.0F);
  glEnd();
  glColor4fv(couleurBleuFonce());
  bitmapStringOutput(0.0F,-0.2F,1.1F,z);
  glColor4fv(couleurBleuFonce(0.5F));
  glBegin(GL_LINES);
  glVertex3f(0.0F,0.0F,lz1);
  glVertex3f(0.0F,0.0F,-lz2);
  glEnd();
  setFont(GLUT_BITMAP_8_BY_13,LEFT);
  glPopAttrib();
}

void myinit(void) {
  GLfloat light_position0[] = { 1.0F,0.0F,1.0F,0.0F };
  GLfloat light_position1[] = { -1.0F,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);
  glEnable(GL_AUTO_NORMAL);
  glEnable(GL_NORMALIZE);
  glDepthFunc(GL_LESS);
  glEnable(GL_ALPHA_TEST);
  glEnable(GL_BLEND);
  glBlendFunc(GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA);
}

void display(void) {
  glClearColor(0.85F,0.85F,0.65F,1.0F);
  glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
  glEnable(GL_DEPTH_TEST);
  glPushMatrix() ;
  manipulateurSouris();
  manipulateurClavier();
  axes(100.0F,100.0F,100.0F,100.0F,100.0F,100.0F,"x","y","z");
  glColor4fv(couleurNoir());
  bitmapStringOutput(0.2F,-0.2F,0.2F,"O");
  glPopMatrix() ;
  glFlush();
  glutSwapBuffers() ;
}

int main(int argc,char **argv) {
  glutInit(&argc,argv);
  glutInitDisplayMode(GLUT_RGBA|GLUT_DEPTH|GLUT_DOUBLE);
  glutInitWindowPosition(10,50); 
  glutInitWindowSize(200,200); 
  f1 = glutCreateWindow("Repere observateur");
  myinit(); 
  creationMenuBasique();
  setParametresOrthoBasique(-2.0,2.0,-2.0,2.0,-100.0,100.0);
  setManipulateurDistance(1.0F);
  glutReshapeFunc(reshapeOrthoBasique);
  glutKeyboardFunc(keyBasique);
  glutSpecialFunc(specialBasique);
  glutDisplayFunc(display);
  glutMotionFunc(motionBasique);
  glutMouseFunc(sourisBasique);
  glutMainLoop();
  return(0);
}