int fps = 60;
float depth;
float scale;
float courtsize;
float netsize;
float ballsize=10;
float grav = 1;
ball b;
void setup(){
  size(500,500,P3D);
  depth = width;
  rectMode(CENTER);
  frameRate(fps);
  scale = width/500;
  courtsize = 300;
  netsize = courtsize / 6;

  b = new ball(0,-netsize*2,courtsize/3);

  mx = 0;
  my = 0;
  background(200);
}
void keyPressed(){
   if(key==' ')background(200); 
}
class ball{
  float x,y,z;
  float xs,ys,zs;
  ball(float px, float py, float pz){
    x = px; 
    y = py; 
    z = pz;
zs = -4;
  }


  void draw(){
  mx = ((float)mouseX-(width/2.0)) / width;
  my = ((float)mouseY - (height/2.0)) / height;
    noStroke();

    pushMatrix();
    fill(0,0,0,50);
    translate(x,0,z);
    box(scale*ballsize,scale,scale*ballsize);    
    popMatrix();
    pushMatrix();
    translate(x,y,z);
    if(mousePressed){
    fill(200);
    } else {

    fill(128.0 + (255.0*x/courtsize),128.0 + (255.0*y/courtsize),128.0 + (255.0*z/courtsize),200);
      
    }
    box(scale*ballsize,scale*ballsize,scale*ballsize);

    popMatrix();

  } 
  void move(){
    //x += xs;
    //y += ys;
x = mx * courtsize;
y = my *  courtsize;
//println(x+" "+y);
    z += zs;
    bounds();
    //ys += grav; 
//println(ys);
  }
  void bounds(){
    if(y > 0.0){
      ys *= -1.0;
      y = 0;
    }
    if(z < -courtsize/2.0){
      z = -courtsize/2.0 ;
      zs *= -1;
    }
    if(z > courtsize/2.0){
      z = courtsize/2.0 ;
      zs *= -1;
    }
    if(x < -courtsize/2.0){
      x = -courtsize/2.0 ;
      xs *= -1;
    }
    if(x > courtsize/2.0){
      x = courtsize/2.0 ;
      xs *= -1;
    }

  


  }

}



void draw(){
//  background(128);
  drawAimer(); 
  pushMatrix();
  translate(250*scale,350*scale,0);
  drawBase();
  b.move();
  b.draw();
  popMatrix();
}
/*
void mousePressed(){
  float hit = 10;
  if(b.z > 0){
//    print("before ys is "+b.xs+" "+b.ys);

    b.xs += mx*hit; 
    b.ys += my*hit; 
    println("after "+b.xs+" "+b.ys);

    b.zs -= hit;
  }
}*/

void drawBase(){
  stroke(255,10);
 // box(scale*courtsize,scale,scale*courtsize) ;

}



float mx;
float my;


void drawAimer(){
  noFill();
  stroke(170);
if(true)return;
  pushMatrix();
  translate(250*scale, 400*scale, 100*scale );
  rotateY(-mx/4);
  rotateX(my/4);
  rotateX(.3);
  box(40*scale,40*scale,40*scale);
  float px = scale*mx*20;
  float py  = scale*my*20;
  stroke(30);
  line(0,scale*20,scale*20,px,scale*20,-20*scale);


  stroke(255);


  line(0,0,scale*20,px,py,-20*scale);
  line(px,py,-20*scale,px,py-(5*scale),-15*scale);
  line(px,py,-20*scale,px,py+(5*scale),-15*scale);
  line(px,py,-20*scale,px-(5*scale),py,-15*scale);
  line(px,py,-20*scale,px+(5*scale),py+(5*scale),-15*scale);

  popMatrix();

  //  line(250,250,250 + mx*30,250 + my*30);

}