Move to target (PVector confusion)

freshfish

Hi, I am trying to wrap my brain around PVectors and using them to move objects. I simply wanted my circles to start in the center and move to a random location on the canvas. I get the movement part but not the target or the subtract functions.

void update() {
target.sub(location);
target.normalize();
target.mult (.1);

velocity.add(acceleration);
velocity.limit(20);
location.add(velocity);

}

target is a PVector that contains a random x/y the velocity add and the location add get the circle moving but I cannot get it to move to the target :( Help thanks

Chrisir

entire code?

GoToLoop

1. http://studio.SketchPad.cc/sp/pad/view/ro.9D4K1FIWJ7Kxc/latest
2. http://studio.SketchPad.cc/sp/pad/view/ro.91nVQMnL$v06L/latest
3. http://studio.SketchPad.cc/sp/pad/view/ro.91kLmk61vAOZp/latest

freshfish

@Chrisir ...sorry its really messy code that doesn't even come close to doing what I want. I literally just want to figure out how to get a circle to move to a random x and random y.

@GoToLoop thanks for those links but they just confused me more :) Not at that point yet

freshfish

I have added the code below...I have gotten it to move towards a target but its in reverse...I also don't necessarily need acceleration...I want the ball to appear in the middle and move towards a random target and stop.

PVector location, velocity, target,acceleration;

void setup() {
  size(400,400);
  location = new PVector(width/2,height/2);
  target = new PVector(random(width),random(height));
  acceleration = new PVector(0,0);
  velocity = new PVector();
}

void draw() {
  location.sub(target);
  location.setMag(0.5);
  acceleration = location;
  velocity.add(acceleration);
  target.add(velocity);
  velocity.limit(5);
  fill(255);
  ellipse(target.x,target.y,20,20);
}