GD105_Week5_Collisions.pde

int  ballX, ballY;
int ballSize;
float xSpeed, ySpeed;

int rectX, rectY, rectW, rectH;

void setup() {
  size(1280, 720);
  ballX = 100;
  ballY = 100;
  ballSize = 50;
  xSpeed = 5;
  ySpeed = 5;
  rectX = 300;
  rectY = 250;
  rectW = 200;
  rectH = 100;
}

void draw() {
  background(0);
  ellipse(ballX, ballY, ballSize, ballSize);
  rect(rectX, rectY, rectW, rectH);
  
  ballX += xSpeed;
  ballY += ySpeed;
  if (ballY > height - ballSize/2) {
    //reverse the speed... positive = down/right ... negative = up/left
    ySpeed *= -1;  
  }
  // if the ball crosses the right boundary... reverse the x direction
  if (ballX > width - ballSize/2){
    xSpeed *= -1;
  }
  //...reverse the y direction if the ball crosses the top boundary
  if (ballY < 0  + ballSize/2){
     ySpeed *= -1; 
  }
  if (ballX < 0 + ballSize/2){
   xSpeed *= -1; 
  }
  
  if (//... the ball is to the left of the rect right side &&
          //the ball is to the right of the rect left side &&
          //the ball is below the rect top side &&
          //the ball is above the rect bottom side...
          ballY  > rectY &&
          ballY < rectY + rectH &&
          ballX > rectX &&
          ballX < rectX + rectW)
          {
           //make something happen... 
           background(200,50,50);
           ballSize +=5;
          }
          
       if (//... the ball is to the left of the rect right side &&
          //the ball is to the right of the rect left side &&
          //the ball is below the rect top side &&
          //the ball is above the rect bottom side...
          mouseY  > rectY &&
          mouseY < rectY + rectH &&
          mouseX > rectX &&
          mouseX < rectX + rectW)
          {
            if (mousePressed){
              ballSize -=1;
            }
          }
}