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cocos2d-iphonechipmunk

Multiple cpShapes (chipmunk)

So I have created two shapes( poly's to be exact) and I need to be able to attach them to a single CCSprite/image, and have them stay in the position that I have created them at. Is there any way to do that?

So in short this is what I am trying to achieve.

  • I have a tire (CCSprite/image) and I have created 2 poly's/cpShapes, one for the top and one for the bottom of the tire so that when the user throws a football it can only go through the center of it.
  • I need to attach the top poly to the top of the tire and the bottom poly to the bottom of the tire
  • I also need to be able to use collision on the tire. For instance if the user throws the football and it hits the bottom of the tire, I need to be able to make the tire sway back and forth with both shapes moving with it.

So my question is really only how can I attach two cpShapes to one image/CCSprite?

I have created my shapes like so:

cpShape *UpperShape = [game.spaceManager addPolyAt:cpv(70,195) mass:STATIC_MASS rotation:0 numPoints:6 points:cpv(2,12), cpv(28,8), cpv(33,0), cpv(36,-10), cpv(-33,-10), cpv(-20,8)];

cpShape *LowerShape = [game.spaceManager addPolyAt:cpv(70,125) mass:STATIC_MASS rotation:0 numPoints:7 points:cpv(34,8), cpv(31,0), cpv(25,-9), cpv(7,-13), cpv(-20,-8), cpv(-30,0), cpv(-35,8)];

P.S I am using spaceManager+chipmunk

Solution

  • Basically, you create a single cpBody, and attach the 2 cpShape's to it. Using ccPhysicsSprite allows you to attach a sprite to a body, which is the result you're trying to get.