array_ball_gravity

int ballnumber=5;

float [] ballx=new float[ballnumber];

float [] bally= new float[ballnumber];

float [] ballSize=new float[ballnumber];

float [] xspeed=new float [ballnumber];

float [] yspeed=new float [ballnumber];

​

float gravity;

​

void setup() {

  //noStroke();

  fill(50, 0, 255,30);

  size(500, 500);

  gravity=0.5;

  for (int i=0; i<ballnumber; i++) {

    ballx[i]=random(width);

    bally[i]=random(height);

    ballSize[i]=i+40;

    xspeed[i]=random(-1, 1);

    yspeed[i]=0;

  }

}

​

void draw() {

  //background(200, 200, 200, 10);

​

  for (int i=0; i<ballnumber; i++) {

    ellipse(ballx[i], bally[i], ballSize[i], ballSize[i]);

    ballx[i]+=xspeed[i];

    bally[i]+=yspeed[i];

    yspeed[i]+=gravity;

    //this checks the ball does not exit the screen height

    if (bally[i]>height) {

      yspeed[i]=yspeed[i]*-0.7;

      bally[i]=height;

    }

    //this checks that the ball does not exit the screen width

    if (ballx[i]>width || ballx[i]<0) {

      xspeed[i]=xspeed[i]*-0.7;

      if (ballx[i]>width) {

        ballx[i]=width;

      }

      if (ballx[i]<0) {

        ballx[i]=0;

      }

    }

  }

  for (int i=0; i<ballnumber; i++) {

    for (int j=i+1; j<ballnumber; j++) {

      if (dist(ballx[i], bally[i], ballx[j], bally[j])<40) {

        yspeed[i]=yspeed[i]*-0.7;

        xspeed[i]=xspeed[i]*-0.7;

      }

    }

  }

}

​

​

​