float brickW, brickH, maxV=8, ballW=15, paddleSpeed=10, paddleW=65, paddleH=7;
float ballX, ballY, ballPX, ballPY, ballXV, ballYV, paddleX, paddleY, paddlePX, paddlePY;
Vector brix = new Vector();
int brickNum=51, lives, ballDetail=3;
boolean goLeft=false, goRight=false;


void setup(){
  size(400,400);
  colorMode(HSB,100);
  rectMode(CENTER);
  frameRate(40);
  //smooth();
  noCursor();
  brickW=(width/7.5);
  brickH=(brickW/3);
  lives=3;
  brix.clear();
  for (int i=0;i<brickNum;i++){
    brix.add(new brick());
  }
  paddleX=mouseX;
  paddleY=height-25;
  resetBall();
}

void draw(){
  if (brix.size()<1) setup();
  background(0);
  paddlePX=paddleX;
  if (mouseX!=pmouseX) paddleX=constrain(mouseX,paddleW/2,width-paddleW/2);
  else if (keyPressed){
    if ((keyCode==LEFT) || (goLeft)) paddleX=constrain(paddleX-10,paddleW/2,width-paddleW/2);
    if ((keyCode==RIGHT) || (goRight)) paddleX=constrain(paddleX+10,paddleW/2,width-paddleW/2);
  }
  fill(100);
  rect(paddleX,paddleY,paddleW,paddleH);
  for (int i=0;i<brix.size();i++){
    ((brick)brix.get(i)).render();
  }
  moveBall();
}

void resetBall(){
  ballX=paddleX;
  ballY=paddleY;
  ballXV=random(-maxV,maxV);
  ballYV=random(-maxV,-maxV/3);
}

void moveBall(){
  ballPX=ballX;
  ballPY=ballY;
  ballX+=ballXV;
  ballY+=ballYV;
  if ((ballX<0) || (ballX>width)) ballXV=-ballXV;
  if (ballY<0) ballYV=-ballYV;
  if (ballY>height){
    lives--;
    delay(1000);
    resetBall();
  }
  float tempX,tempY;
  if ( (ballPY<ballY) && (dist(0,ballY,0,paddleY)<(paddleH/2+ballW/2)) && (dist(ballX,0,paddleX,0)<(paddleW/2+ballW/2)) ) ballYV=-ballYV;
  for (int i=0;i<brix.size();i++){
    tempX=((brick)brix.get(i)).xpos;
    tempY=((brick)brix.get(i)).ypos;
    if ( (dist(ballX,0,tempX,0)<(brickW/2+ballW/2)) && (dist(0,ballY,0,tempY)<(brickH/2+ballW/2)) ){
      brix.remove(i);
      if ((ballX>tempX-brickW/2) && (ballX<tempX+brickW/2)) ballYV=-ballYV; // if ball is between brick sides, bounce up/down
      else ballXV=-ballXV; // otherwise, bounce left-right
    }
  }
  noStroke();
  for (int i=1;i<ballDetail;i++){
    fill(55,100,40+i*20);
    ellipse(ballX,ballY,ballW/i,ballW/i);
  }
}

class brick{
  float xpos, ypos;
  int id;
  brick(){
    //xpos=(int)random(width/brickW)*brickW+brickW/2;
    //ypos=(int)random((height/2)/brickH)*brickH;
    id = brix.size();
    xpos =  brickW*id%(width+brickW)-(brickW/2);
    ypos = .5*brickH + brickH*int(id/((width+brickW)/brickW));
  }
  void render(){
    fill(0,100,100,75);
    stroke(75);
    rect(xpos,ypos,brickW,brickH);
  }
}

void keyReleased(){
  if (key=='r') setup();
  if (keyCode==LEFT) goLeft=false;
  if (keyCode==RIGHT) goRight=false;
}

void keyPressed(){
  if (keyCode==LEFT) goLeft=true;
  if (keyCode==RIGHT) goRight=true;
}

float chaseX(float objectx,float angle,float speed){
  return (objectx+(speed * cos(angle)));
}

float chaseY(float objecty,float angle,float speed){
  return (objecty+(speed * sin(angle)));
}