Fixed rotating wheel

[Brainfart]

Hi,

Does anyone have any idea how I would create a spinning wheel that is in a fixed position but infinately spins? The axis could be at any part of the wheel but for simplicity I can start with it at the center and I want it to collide with any body that hits it.

[slembcke]

If the wheel is rotating exactly around it's center, then it's very easy. Create a new static body (infinite mass and moment of inertia, don't add it to the space), set it's rotational velocity (body->w), and add a static circle shape to it with no offset.

The body won't actually be rotating, but anything that touches it will think it is. Because the rotation is happening around the body's exact center, the response will look correct. You'll have to handle the graphics differently for it though.

If you want something more flexible, you'll have to update the velocity and position of the static body yourself.