NEW 50 Balls - OpenProcessing

mySketch
xxxxxxxxxx
 
//Variables
​
int numCircs = 50;  
​
//Speed
​
float [] speedx = new float [numCircs]; 
​
float [] speedy = new float [numCircs];
​
//Button
​
float rectX, rectY, rectW, rectH; 
​
//Ball
​
float ballW, ballH;  //ballX, ballY, 
​
// Location
​
float [] ballXpos = new float [numCircs]; //# of balls I want
​
float [] ballYpos = new float [numCircs]; //# of balls I want
​
// ball touched the button?
​
boolean button = false;
​
​
void setup () {
​
  size (400, 400);
​
  //button atttributes
​
  rectY = height/2;
​
  rectW = 100;
​
  rectH = 20;
​
  //location of all the balls
  // ballXpos.length is the same as numCircs
  for (int i = 0; i < ballXpos.length; i = i+1) {
​
    ballXpos[i] = random(width);
​
    speedx[i]=2;
  }
  // either i++ or i = i + 1never both!
  for (int i = 0; i < ballYpos.length; i = i+1) {
​
    ballYpos[i] = random(height);
​
    speedy[i]=2;
  }
​
  ballW = 40;
  ballH = 40;
}
​
void draw () {
​
​
  //BUTTON
  //background (0);
​
  if (button == true) {
​
    background(30, 150, 7);
    rect (width/2, height/2, 60, 60);
  } else {
​
    // if no touch stays same
​
    background(255);
  }  
​
  rectX =  mouseX; 
​
  fill (#FCD805);   // yellow
​
  rect (rectX, rectY, rectW, rectH);
  //counter
  //noFill();
  for (int c = 0; c < numCircs; c = c+1) {
    
    fill (255, 0, 0);
    ellipse (ballXpos[c], ballYpos[c], 30, 30);   
    ballYpos[c] = ballYpos[c] + speedy[c];
    ballXpos[c] = ballXpos[c] + speedx[c];
​
    // is the ball touching the button? 
    if ((ballXpos[c] > rectX-ballW/2) && 
      (ballXpos[c] < rectX+rectW+ballW/2) && 
      (ballYpos[c] > rectY-ballW/2) && 
      (ballYpos[c] < rectY+rectH+ballW/2)) {
​
      button = !button; 
​
      // When any ball hits the button make it bounce in opposit direction
​
      if ( ( ballYpos[c] < rectY) || ( ballYpos[c] > rectY+rectH)) {   //if it reaches top or bottom, reverse directions 
​
        speedy[c] = speedy[c] * -1;   //reverse direction vertically
        //fill (0, 0, 255);   // testing changing the ball colour on button presss
​
        //make them bounce randomly around
      } else if ((ballXpos[c] < rectX) || (ballXpos[c] > rectX+rectW)) {   // if it reaches the sides, reverse directions
​
        speedx[c] = speedx[c] * -1;     // reverse direction horizontally
        //fill (255, 0,0);
      }
    } 
​
​
​
    // is the ball touching the sides
    if ( (ballXpos[c] > width) || (ballXpos[c] < 10) ) {
​
      speedx[c] = speedx[c] * -1;
    }
    // is the ball touching the top or bottom? 
    if ( (ballYpos[c] > height) || (ballYpos[c] < 10) ) {
​
      speedy[c] = speedy[c] * -1;
    }
  }
}
​