Aula22

void setup() {
  size(600, 600);
  noStroke();
}

void draw() {
  background(255);

  float x = mouseX-width/2;
  float y = mouseY-height/2;
  float[] vA = new float[2];
  float[] vB = new float[2];

  vA = coordenadasPolares(atan2(y, x), 20);
  vB = coordenadasPolares(atan2(y, x), 30);

  if (distancia2D(width/2, mouseX, height/2, mouseY) > 50) {

    fill(30, 170, 18);
    ellipse(width/2, height/2, 140, 140);
    fill(0);
    ellipse(vB[0]+ width/2, vB[1]+ height/2, 40, 40);
  } else {

    fill(30, 170, 18);
    ellipse(width/2, height/2, 140, 140);
    fill(0);
    ellipse(mouseX, mouseY, 40, 40);
  }
}


float distancia2D(float x1, float x2, float y1, float y2) {
  float d = sqrt(pow((x2-x1), 2) + pow((y2-y1), 2));
  return d;
}


float[] coordenadasPolares(float ang, float raio) {
  float vC[] = new float[2];
  vC[0] = raio*cos( (ang));
  vC[1] = raio*sin( (ang));
  return vC;
}