Have a rectangle shape

[noobiept]

Hello, I'm trying to have a platform with a rectangle shape, and I'm not seeing how I can add that shape.

I can have the drawn part and a Particle interacting well, but the Particle has the shape of a circle. Is there a way to have a rectangle shape?

[soulwire]

CoffeePhysics isn't a rigid body engine, so it doesn't currently handle polygon collisions in that way.

One option you have is to make your square from 4 particles, connected by very stiff springs. Connect them around the perimeter of the square and in a cross. Something like:

var squareSise = 50;

// Corners
var tl = new Particle();
var tr = new Particle();
var br = new Particle();
var bl = new Particle();

// Perimeter
var s1 = new Spring(tl, tr, 50, 1.0);
var s2 = new Spring(tr, br, 50, 1.0);
var s3 = new Spring(br, bl, 50, 1.0);
var s4 = new Spring(bl, tl, 50, 1.0);

// Cross
var s5 = new Spring(tl, br, 50, 1.0);
var s6 = new Spring(bl, tr, 50, 1.0);

This will bounce off walls, thought there might be some slight elasticity as the springs compress. Also, collisions between squares won't be handled if 2 rotated squares intersect.

If you need this kind of behaviour, I suggest you use a rigid body engine like Box2d :)

[noobiept]

Hey, thanks for the help.

I tried doing that but the collision detection isn't working. I'm trying to have the ball stop at the platform. If you could give this a look, I'd really appreciate it.

https://gist.github.com/4121971

(I'm using createjs, don't know if you're familiar, but I can explain if you don't understand)