KP3 animacia pong

animacia_pong.pde

float circleX, circleY;
int size = 10; 
float deltaX, deltaY;

int rectX, rectY;
int rectWidth, rectHeight;

float cR, cG, cB;


void setup() {
  frameRate(150);
  background(0);
  size(800, 600);
  
  rectX = 0;
  rectY = 200;
  rectWidth = 50;
  rectHeight = 80;

  circleX = width / 2;
  circleY = height / 2;
  
  initDelta();
  changeColor();
}

void draw() {

  if (gameOver()) {
    println("prehral");
    background(0);
    textAlign(CENTER);
    text("game over \n(click mouse to start again)", width/2, height/2);
    return;
  }
  
  backgroundWithAlpha(0);
    
  drawRect(rectX, rectY);
  drawCircle(circleX, circleY);
  moveCircle();
  
  if (circleX >= width) {
    deltaX = deltaX * -1.1;
    changeColor();
  }
  if (circleY >= height || circleY <= 0) {
    deltaY = deltaY * -1.1;
    changeColor();
  }
  if (circleX <= rectWidth && circleY > rectY && circleY < (rectY+rectHeight)) {
    deltaX = deltaX * -1.1;
    changeColor();
  }
  
  // void side of the space
  fill(255, 0, 50);
  rect(0,0,1, height);
}

void drawRect(float posX, float posY) {
  fill(0,111,222);
  rect(posX, posY, rectWidth, rectHeight); 
}

void drawCircle(float posX, float posY) {
  fill(cR,cG,cB);
  circle(posX, posY, size);
}

void moveCircle() {
  circleX = circleX + deltaX;
  circleY = circleY + deltaY;
}

void initDelta() 
{
  deltaX = 1 + random(0,1);
  deltaY = 1 + random(0,1);
}

void changeColor()
{
  cR=random(100,255);
  cG=random(100,255);
  cB=random(100,255);
}

void backgroundWithAlpha(float bgColor) 
{
  fill(bgColor, 5);
  noStroke();
  rect(0,0,width, height);
}

boolean gameOver() {
  return (circleX <= 0);
}

void mouseMoved() {
  rectY = mouseY;
}

void mouseClicked() {
  setup();
}