如何扩展物理学？

Question

When I scale a CCSprite with a physicsbody attached the physics body doesn't scale (I have debugDraw on). How do I scale the physicsBody?

I found this code to change the radius of a circular physical body but it doesn't work on cocos2d v3..

    for(ChipmunkCircleShape* newShape in self.chipmunkObjects)
    {
        if([newShape isKindOfClass:[ChipmunkCircleShape class]]) {
            cpCircleShapeSetRadius([newShape shape],[newShape radius]*scale); // Unsafe Resize
            cpCircleShapeSetOffset([newShape shape],ccpMult([newShape offset],scale));
        }
    }

Answer 1

Do you include "chipmunk_unsafe.h"? Functions cpCircleShapeSetRadius and cpCircleShapeSetOffset are defined there. Read also the comment here . Hope it helps :)