import processing.opengl.*;

/*Alcys_Arcen3D
 *   	1)  clic droit et drag: change le point de vue 
 *  	2) clic gauche et drag : déplacer la queue de billard et lui donner sa force et sa direction
 *     
 *  	
 *	 1)click and drag right: to move the camera 
 *	 2)click and drag left :to move the axis
 *		 
 *	
 *
 **/
PImage brazil,brazilr;
Camera cam;
float theta,phi,distanceEcranOeil,rayon,zplan;
Quat lequat;
Vecteur camX,camY,camZ,camX0,camY0,camZ0,vectOriginMouse,vectEyeMouse,vectImpact ;
int etape;
String texte;
PFont mafont;
AxeQuat quatsystem;


void setup(){
  size(700,600,OPENGL);
    //size(700,600,P3D);
  brazil=loadImage("Brazil200.jpg");
  brazilr=loadImage("Brazil200r.gif");  
  distanceEcranOeil=-height/(2*(float)Math.tan(PI/6));
  theta=1.0f;
  phi=1.0f;
  zplan=200;
  lequat=new Quat(1,0,0,0);
  camZ0=new Vecteur(0,0,1); 
  camY0=new Vecteur(0,1,0);
  camX0=new Vecteur(1,0,0);
  Quat   lequa=Quat.mul(new Quat(cos(-0.65),sin(-0.65),0,0),lequat);
  camZ0=lequa.tourner(camZ0);
  camY0=lequa.tourner(camY0);
  camX0=lequa.tourner(camX0);
  camZ=camZ0.cloner();
  camY=camY0.cloner();
  camX=camX0.cloner();

  cam=new Camera(camX0,camY0,camZ0);
  vectOriginMouse=new Vecteur(0,0,0);
  vectImpact=new Vecteur(-30,400,200);
  mafont=loadFont("Arial.vlw");
  textFont(mafont,28); 
  rayon=15;
  quatsystem=new AxeQuat();
  etape=0;
  ellipseMode(CENTER); 
  resetMatrix();
}
void draw(){ 
  background(5,15,40);//0,30,80
   
  pushMatrix();
  cam.placercamera();
  repere();
  image(brazil,50,50,200,200);
  pointeur();
  quatsystem.dessiner(vectImpact);
  popMatrix();
 pushMatrix();
     resetMatrix();
     translate(0 ,0,-1000);
     fill(255);
 
    text(texte,-600,500);
    text("please, clik SPACE..... and  UP, DOWN, LEFT, RIGHT",-600,550); 
   popMatrix();


}
void repere(){
  float lo,ep,lo2,ep2,dif;
  lo=100;
  ep=4;
  lo2=lo/2;
  ep2=ep/2;
  dif=lo2-ep2;
  pushMatrix();
  noStroke();
  translate(lo2,ep2,ep2);
  fill(255,0,0);
  box(lo,ep,ep);
  translate(-dif,dif,0);
  fill(0,250,0);
  box(ep,lo,ep);
  translate(0,-dif,dif);
  fill(0,0,250);
  box(ep,ep,lo);
  popMatrix();

}
Vecteur absolu(float x,float y,float z){
  float xx=modelX(x,y,z);
  float yy=modelY(x,y,z);
  float zz=modelZ(x,y,z);
  return new Vecteur(xx,yy,zz);
}

void mouseDragged(){
  if(mouseY<570){
  if(mouseButton==RIGHT){//Déplacer la caméra en calculant son nouveau repere 
    theta+=(mouseY-pmouseY)/200.0f;
    phi+=(mouseX-pmouseX)/200.0f;
    repereCamera();
  }
  if(mouseButton == LEFT){//déplacer le sélecteur en calculant le vecteur vectImpact
    intersectionRayonPlanXY();
  }}
}
public void repereCamera()
{
  Quat quat = new Quat(cos(phi / 2.0F), 0.0F, 0.0F, sin(phi / 2.0F));
  Quat quat1 = new Quat(cos(theta / 2.0F), cos(phi) * sin(theta / 2.0F), sin(phi) * sin(theta / 2.0F), 0.0F);
  lequat = Quat.mul(quat1, quat);
  camZ = lequat.tourner(camZ0);
  camY = lequat.tourner(camY0);
  camX = lequat.tourner(camX0);
}
public void intersectionRayonPlanXY(){
  vectEyeMouse = camZ.mul(distanceEcranOeil).ajouter(camY, mouseY - height / 2).ajouter(camX, mouseX - width / 2);
  vectOriginMouse = cam.oeil.ajouter(vectEyeMouse, 1.0F);
  if(vectEyeMouse.z!=0){
    float lambda=(zplan-cam.oeil.z)/vectEyeMouse.z;//cam.oeil.z
    vectImpact=cam.oeil.ajouter(vectEyeMouse,lambda);

  }
}

public void pointeur(){

  //dessiner le pointeur au point d'impact
 
  pushMatrix();
  translate(vectImpact.x,vectImpact.y,vectImpact.z);
     directionalLight(255, 0, 255,-vectImpact.x,-vectImpact.y,-vectImpact.z);   
  fill(255,25,20);
  noStroke();
  beginShape(TRIANGLES);
  for(int i=0;i<=12;i++){
    float a1=PI/6*i,a2=PI/6*(i+1);
    vertex(0,0,0);
    vertex(10*cos(a1),10*sin(a1),15);
    vertex(10*cos(a2),10*sin(a2),15);
  } 
  endShape();
  beginShape(TRIANGLE_STRIP);	
  for(int i=0;i<=12;i++){
    float a1=PI/6*i;
    if(i%2==0){ 
      vertex(4*cos(a1),4*sin(a1),rayon/2);
      vertex(4*cos(a1),4*sin(a1),rayon*4);
    }
  }
  endShape();

  popMatrix();
}      
void keyPressed()
{ 
  if(keyCode==' '){
    etape=(etape+1)%4;
    }
 if(keyCode==RIGHT){ 
      quatsystem.angle=min(quatsystem.angle+0.01f,6.28f);}
 if(keyCode==LEFT){ 
      quatsystem.angle=max(quatsystem.angle-0.01f,0.1f);}
 if(keyCode==UP){ 
      quatsystem.rapport=min(quatsystem.rapport+0.01f,3.1f);
      quatsystem.rap=pow(quatsystem.rapport,1.0f/quatsystem.pas);
  }
if(keyCode==DOWN){ 
      quatsystem.rapport=max(quatsystem.rapport-0.01f,0.3f);
      quatsystem.rap=pow(quatsystem.rapport,1.0f/quatsystem.pas);
  }
}