first of all im sorry for my english, it isnt that good.
im gonna catch up with my problem:

what i try to do is creating objects(ellipses) random on the stage.
these ellipses are growing from 0 to "maxSize".

what i want to do is, if one ellipse touches another it should recoil.

i tried so much. till now im trying to find a solution with PVector.

dont be to hard with me, im not a professional - just a student.


this is my code:
Code:

int stageWidth = 1200;
int stageHeight = 800;
int maxBalls = 50;
PVector[] v2 = new PVector[maxBalls];
MagneticBall[] balls = new MagneticBall[maxBalls];

void setup() {
  size(stageWidth, stageHeight);
  background(40);
  smooth();
  frameRate(60); 
  for(int i = 0; i <  balls.length; i++) {
    v2[i] = new PVector(random(-1, 1), random(-1, 1));
    balls[i] = new MagneticBall(1, 1, random(-200, 200), random(-200, 200), random(40, 255), 0.1, random(20, 60));
    balls[i].allBalls = balls;
  }
}

void draw() {
  background(40);
  translate(stageWidth/2, stageHeight/2);
  for(int i = 0; i<balls.length; i++) {
   
    balls[i].drawMagneticBall(v2[i]);
  };
} 

and the BallsClass
Code:

class MagneticBall {
  float ballSize;
  float ballSizeGrow;
  float ballSizeMax;

  float ballPositionX;
  float ballPositionY;


  float ballSpeed;
  float ballSpeed2;

  float d;

  float g1;

  int moveDirection;
  int moveThis;

  MagneticBall[] allBalls;

  float strokeWidth;
  float strokeColor;


  PVector v1;
  PVector vPos;


  MagneticBall(float tempBallSize, float tempStrokeWidth, float tempBallPositionX, float tempBallPositionY, float tempStrokeColor, float tempBallSizeGrow, float tempBallSizeMax) {
    ballSizeMax = tempBallSizeMax;
    ballSizeGrow = tempBallSizeGrow;
    ballSize = tempBallSize;
    strokeWidth = tempStrokeWidth;
    ballPositionX = tempBallPositionX;
    ballPositionY = tempBallPositionY;
    strokeColor = tempStrokeColor;
    vPos = new PVector(tempBallPositionX, tempBallPositionY);
  }

  void drawMagneticBall(PVector tempV2) {
    g1++;
    v1 = tempV2;
    noFill();
    stroke(strokeColor);
    if(ballSize < ballSizeMax) {
	ballSizeGrow += 0.01;
	ballSize += ballSizeGrow;
    }
    strokeWeight(strokeWidth);
    for(int i = 0; i<maxBalls; i++) {
	if(ballPositionX != allBalls[i].ballPositionX) {
	  d = dist(ballPositionX, ballPositionY, allBalls[i].ballPositionX, allBalls[i].ballPositionY);
	  if(d < ballSize/2+allBalls[i].ballSize/2) {
	    v1 = allBalls[i].v1;
	  }

	}

    }
    v1.div(1.1);

    vPos.add(v1);



    ellipse(vPos.x, vPos.y, ballSize, ballSize);
  }





}













 

any questions and answers are welcome. thank you



blaufasan