axmol/cocos/physics/CCPhysicsWorld.h

/****************************************************************************
 Copyright (c) 2013 cocos2d-x.org
 
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 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
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 The above copyright notice and this permission notice shall be included in
 all copies or substantial portions of the Software.
 
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 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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 ****************************************************************************/

#ifndef __CCPHYSICS_WORLD_H__
#define __CCPHYSICS_WORLD_H__

#include "ccConfig.h"
#ifdef CC_USE_PHYSICS

#include <list>
#include <vector>

#include "CCObject.h"
#include "CCGeometry.h"

NS_CC_BEGIN

class PhysicsBody;
class PhysicsJoint;
class PhysicsWorldInfo;
class PhysicsShape;
class PhysicsContact;
class Array;

typedef Point Vect;

class Sprite;
class Scene;
class DrawNode;
class PhysicsDebugDraw;

class PhysicsWorld;

typedef struct PhysicsRayCastInfo
{
    PhysicsShape* shape;
    Point start;
    Point end;
    Point contact;
    Vect normal;
    float fraction;
    void* data;
}PhysicsRayCastInfo;

/**
 * @brief Called for each fixture found in the query. You control how the ray cast
 * proceeds by returning a float:
 * return true: continue
 * return false: terminate the ray cast
 * @param fixture the fixture hit by the ray
 * @param point the point of initial intersection
 * @param normal the normal vector at the point of intersection
 * @return true to continue, false to terminate
 */
typedef std::function<bool(PhysicsWorld& world, const PhysicsRayCastInfo& info, void* data)> PhysicsRayCastCallbackFunc;
typedef std::function<bool(PhysicsWorld&, PhysicsShape&, void*)> PhysicsRectQueryCallbackFunc;
typedef PhysicsRectQueryCallbackFunc PhysicsPointQueryCallbackFunc;

/**
 * @brief An PhysicsWorld object simulates collisions and other physical properties. You do not create PhysicsWorld objects directly; instead, you can get it from an Scene object.
 */
class PhysicsWorld
{
public:
    static const int DEBUGDRAW_NONE = 0x00;
    static const int DEBUGDRAW_SHAPE = 0x01;
    static const int DEBUGDRAW_JOINT = 0x02;
    static const int DEBUGDRAW_CONTACT = 0x04;
    static const int DEBUGDRAW_ALL = DEBUGDRAW_SHAPE | DEBUGDRAW_JOINT | DEBUGDRAW_CONTACT;
    
public:
    /** Adds a joint to the physics world.*/
    virtual void addJoint(PhysicsJoint* joint);
    /** Removes a joint from the physics world.*/
    virtual void removeJoint(PhysicsJoint* joint, bool destroy);
    /** Remove all joints from the physics world.*/
    virtual void removeAllJoints(bool destroy);
    
    virtual void removeBody(PhysicsBody* body);
    virtual void removeBody(int tag);
    virtual void removeAllBodies();
    
    void rayCast(PhysicsRayCastCallbackFunc func, const Point& point1, const Point& point2, void* data);
    void queryRect(PhysicsRectQueryCallbackFunc func, const Rect& rect, void* data);
    void queryPoint(PhysicsPointQueryCallbackFunc func, const Point& point, void* data);
    Array* getShapes(const Point& point) const;
    PhysicsShape* getShape(const Point& point) const;
    Array* getAllBodies() const;
    PhysicsBody* getBody(int tag) const;
    
    /** Register a listener to receive contact callbacks*/
    //inline void registerContactListener(EventListenerPhysicsContact* delegate) { _listener = delegate; }
    /** Unregister a listener. */
    //inline void unregisterContactListener() { _listener = nullptr; }
    
    inline Scene& getScene() const { return *_scene; }
    /** get the gravity value */
    inline Vect getGravity() const { return _gravity; }
    /** set the gravity value */
    void setGravity(const Vect& gravity);
    
    /** set the debug draw */
    void setDebugDrawMask(int mask);
    inline int getDebugDrawMask() { return _debugDrawMask; }
    
protected:
    static PhysicsWorld* construct(Scene& scene);
    bool init(Scene& scene);
    
    virtual void addBody(PhysicsBody* body);
    virtual void addShape(PhysicsShape* shape);
    virtual void removeShape(PhysicsShape* shape);
    virtual void update(float delta);
    
    virtual void debugDraw();
    
    virtual int collisionBeginCallback(PhysicsContact& contact);
    virtual int collisionPreSolveCallback(PhysicsContact& contact);
    virtual void collisionPostSolveCallback(PhysicsContact& contact);
    virtual void collisionSeparateCallback(PhysicsContact& contact);
    
    virtual void doAddBody(PhysicsBody* body);
    virtual void doRemoveBody(PhysicsBody* body);
    virtual void doAddJoint(PhysicsJoint* joint);
    virtual void doRemoveJoint(PhysicsJoint* joint);
    virtual void addBodyOrDelay(PhysicsBody* body);
    virtual void removeBodyOrDelay(PhysicsBody* body);
    virtual void addJointOrDelay(PhysicsJoint* joint);
    virtual void removeJointOrDelay(PhysicsJoint* joint);
    virtual void updateBodies();
    virtual void updateJoints();
    
protected:
    Vect _gravity;
    float _speed;
    PhysicsWorldInfo* _info;
    
    Array* _bodies;
    std::list<PhysicsJoint*> _joints;
    Scene* _scene;
    
    bool _delayDirty;
    PhysicsDebugDraw* _debugDraw;
    int _debugDrawMask;
    
    
    Array* _delayAddBodies;
    Array* _delayRemoveBodies;
    std::vector<PhysicsJoint*> _delayAddJoints;
    std::vector<PhysicsJoint*> _delayRemoveJoints;
    
protected:
    PhysicsWorld();
    virtual ~PhysicsWorld();
    
    friend class Sprite;
    friend class Scene;
    friend class PhysicsBody;
    friend class PhysicsShape;
    friend class PhysicsJoint;
    friend class PhysicsWorldCallback;
    friend class PhysicsDebugDraw;
};


class PhysicsDebugDraw
{
protected:
    virtual bool begin();
    virtual void end();
    virtual void drawShape(PhysicsShape& shape);
    virtual void drawJoint(PhysicsJoint& joint);
    virtual void drawContact();
    
protected:
    PhysicsDebugDraw(PhysicsWorld& world);
    virtual ~PhysicsDebugDraw();
    
protected:
    DrawNode* _drawNode;
    PhysicsWorld& _world;
    
    friend class PhysicsWorld;
};
extern const float PHYSICS_INFINITY;

NS_CC_END

#endif // CC_USE_PHYSICS
#endif // __CCPHYSICS_WORLD_H__