ChipmunkExtras.h

#define ChipmunkGetObject(s) s->data
#define ChipmunkGetData(s) [s->data data]

@interface ChipmunkBody (Extras)

- (CGAffineTransform)affineTransform;

@end

@interface ChipmunkSpace (Extras)

- (ChipmunkBody *)addBody:(ChipmunkBody *)obj;
- (ChipmunkBody *)removeBody:(ChipmunkBody *)obj;

- (ChipmunkShape *)addShape:(ChipmunkShape *)obj;
- (ChipmunkShape *)removeShape:(ChipmunkShape *)obj;

- (ChipmunkShape *)addStaticShape:(ChipmunkShape *)obj;
- (ChipmunkShape *)removeStaticShape:(ChipmunkShape *)obj;

- (ChipmunkConstraint *)addConstraint:(ChipmunkConstraint *)obj;
- (ChipmunkConstraint *)removeConstraint:(ChipmunkConstraint *)obj;

@end