ChipmunkMultiGrab.h

// Copyright 2013 Howling Moon Software. All rights reserved.
// See http://chipmunk2d.net/legal.php for more information.

#import "ObjectiveChipmunk.h"

@interface ChipmunkGrab : NSObject<ChipmunkObject> {
  NSArray *_chipmunkObjects;
  
  cpVect _pos;
  cpFloat _smoothing;
  
  ChipmunkShape *_grabbedShape;
  
  id _data;
}

@property(nonatomic, readonly) cpVect pos;

@property(nonatomic, readonly) ChipmunkShape *grabbedShape;

@property(nonatomic, retain) id data;

@end


@interface ChipmunkMultiGrab : NSObject {
  ChipmunkSpace *_space;
  NSMutableArray *_grabs;
  
  cpFloat _smoothing;
  cpFloat _grabForce;
  
  cpFloat _grabFriction;
  cpFloat _grabRotaryFriction;
  cpFloat _grabRadius;
  
  cpLayers _layers;
  cpGroup _group;
  bool (^_grabFilter)(ChipmunkShape *shape);
  cpFloat (^_grabSort)(ChipmunkShape *shape, cpFloat depth);
  
  bool _pushMode, _pullMode;
  
  cpFloat _pushMass;
  cpFloat _pushFriction;
  cpFloat _pushElasticity;
  cpCollisionType _pushCollisionType;
}

@property(nonatomic, assign) cpFloat smoothing;
@property(nonatomic, assign) cpFloat grabForce;

@property(nonatomic, assign) cpLayers layers;

@property(nonatomic, assign) cpGroup group;

@property(nonatomic, copy) bool (^grabFilter)(ChipmunkShape *shape);

@property(nonatomic, copy) cpFloat (^grabSort)(ChipmunkShape *shape, cpFloat depth);

@property(nonatomic, assign) cpFloat grabFriction;

@property(nonatomic, assign) cpFloat grabRotaryFriction;

@property(nonatomic, assign) cpFloat grabRadius;

@property(nonatomic, assign) bool pullMode;
@property(nonatomic, assign) bool pushMode;

@property(nonatomic, assign) cpFloat pushMass;
@property(nonatomic, assign) cpFloat pushFriction;
@property(nonatomic, assign) cpFloat pushElasticity;
@property(nonatomic, assign) cpCollisionType pushCollisionType;

@property(nonatomic, readonly) NSArray *grabs;


-(id)initForSpace:(ChipmunkSpace *)space withSmoothing:(cpFloat)smoothing withGrabForce:(cpFloat)grabForce;

-(ChipmunkGrab *)beginLocation:(cpVect)pos;

-(ChipmunkGrab *)updateLocation:(cpVect)pos;

-(ChipmunkGrab *)endLocation:(cpVect)pos;

@end