Change a SKPhysicsBody's body shape

Question

I don't want to change ANYTHING other than the body that defines the shape of a SKPhysicsBody. How do I do this?

I can't seem to find where I can change this.

Or even commentary on how to change it.

Yes, I know this has to be done carefully, so that it avoids all possible new collisions, overlaps, etc. But putting that aside, how do I change the body of an SKPhysicsBody?

How do you create that particular physics body? Or you ask in general? But, physics body can be created in many different ways. Anyhow, you will change its shape if you re-create it. — Whirlwind, Jan 08 '17 at 12:22
I think the goal it's to change for example from a PhysicsBody rectangle shape to physicsBody circle shape — Alessandro Ornano, Jan 08 '17 at 14:29
You can't, you do not have access to the `path` property. All you can do is create a new body and copy what is set in the old — Knight0fDragon, Jan 08 '17 at 15:07
@Knight0fDragon is there a easy/fast/light way to absolutely ensure that all the properties of the previous body are copied across? — Confused, Jan 08 '17 at 15:43

score 1 · Accepted Answer · answered Jan 09 '17 at 15:37

1

You can manually create a custom shape for a physics body using CGMutablePath, then pass it into the SKPhysicsBody constructor.

For example:

let path = CGMutablePath()
path.move(to: CGPoint(.....))
path.addLine(to: CGPoint(.....))

let customPhysicsBody = SKPhysicsBody(edgeChainFrom: path)

answered Jan 09 '17 at 15:37

claassenApps

1,137
7
14

Can this be passed in, over and over, thereby changing the shape, or is a new physics body required for each new shape? – Confused Jan 10 '17 at 10:21
You can pass in the same path to create as many physics bodies as you want. Is that what you're asking? – claassenApps Jan 10 '17 at 14:21
No. I want to change the body a physicsBody is using. – Confused Jan 10 '17 at 16:32
Have you tried setting the node's physics body to nil, then setting it to a newly instantiated physics body? – claassenApps Jan 10 '17 at 16:34

Change a SKPhysicsBody's body shape

1 Answers1

Linked