mirror of https://github.com/axmolengine/axmol.git
594 lines
16 KiB
C++
594 lines
16 KiB
C++
/****************************************************************************
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Copyright (c) 2013-2016 Chukong Technologies Inc.
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Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.
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http://www.cocos2d-x.org
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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****************************************************************************/
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#ifndef __CCPHYSICS_JOINT_H__
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#define __CCPHYSICS_JOINT_H__
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#include <functional>
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#include "base/ccConfig.h"
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#if CC_USE_PHYSICS
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#include "base/CCRef.h"
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#include "math/CCGeometry.h"
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struct cpConstraint;
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NS_CC_BEGIN
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class Node;
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class PhysicsBody;
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class PhysicsWorld;
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class WriteCache;
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/**
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* @addtogroup physics
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* @{
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* @addtogroup physics_2d
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* @{
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*/
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/**
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* @brief An PhysicsJoint object connects two physics bodies together.
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*/
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class CC_DLL PhysicsJoint
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{
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protected:
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typedef std::function<void()> DelayTask;
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protected:
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PhysicsJoint();
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virtual ~PhysicsJoint() = 0;
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public:
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/**Get physics body a connected to this joint.*/
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PhysicsBody* getBodyA() const { return _bodyA; }
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/**Get physics body b connected to this joint.*/
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PhysicsBody* getBodyB() const { return _bodyB; }
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/**Get the physics world.*/
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PhysicsWorld* getWorld() const { return _world; }
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/**
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* Get this joint's tag.
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*
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* @return An integer number.
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*/
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int getTag() const { return _tag; }
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/**
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* Set this joint's tag.
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*
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* @param tag An integer number that identifies a PhysicsJoint.
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*/
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void setTag(int tag) { _tag = tag; }
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/** Determines if the joint is enable. */
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bool isEnabled() const { return _enable; }
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/** Enable/Disable the joint. */
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void setEnable(bool enable);
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/** Determines if the collision is enable. */
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bool isCollisionEnabled() const { return _collisionEnable; }
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/** Enable/disable the collision between two bodies. */
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void setCollisionEnable(bool enable);
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/** Remove the joint from the world. */
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void removeFormWorld();
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/** Set the max force between two bodies. */
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void setMaxForce(float force);
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/** Get the max force setting. */
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float getMaxForce() const { return _maxForce; }
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protected:
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bool init(PhysicsBody* a, PhysicsBody* b);
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bool initJoint();
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void delay(const DelayTask & task) { _delayTasks.push_back(task); }
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void flushDelayTasks();
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/** Create constraints for this type joint */
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virtual bool createConstraints() { return false; }
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std::vector<cpConstraint*> _cpConstraints;
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std::vector<DelayTask> _delayTasks;
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PhysicsBody* _bodyA;
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PhysicsBody* _bodyB;
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PhysicsWorld* _world;
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WriteCache *_writeCache = nullptr;
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bool _enable;
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bool _collisionEnable;
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bool _destroyMark;
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int _tag;
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float _maxForce;
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bool _initDirty;
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friend class PhysicsBody;
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friend class PhysicsWorld;
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friend class PhysicsDebugDraw;
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};
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/**
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* @brief A fixed joint fuses the two bodies together at a reference point. Fixed joints are useful for creating complex shapes that can be broken apart later.
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*/
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class CC_DLL PhysicsJointFixed : public PhysicsJoint
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{
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public:
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/** Create a fixed joint.
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@param a A is the body to connect.
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@param b B is the body to connect.
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@param anchr It's the pivot position.
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@return A object pointer.
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*/
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static PhysicsJointFixed* construct(PhysicsBody* a, PhysicsBody* b, const Vec2& anchr);
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virtual bool createConstraints() override;
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protected:
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PhysicsJointFixed() {}
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virtual ~PhysicsJointFixed() {}
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Vec2 _anchr;
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};
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/**
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* @brief A limit joint imposes a maximum distance between the two bodies, as if they were connected by a rope.
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*/
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class CC_DLL PhysicsJointLimit : public PhysicsJoint
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{
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public:
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/** Create a limit joint.
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@param a A is the body to connect.
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@param b B is the body to connect.
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@param anchr1 Anchr1 is the anchor point on body a.
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@param anchr2 Anchr2 is the anchor point on body b.
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@return A object pointer.
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*/
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static PhysicsJointLimit* construct(PhysicsBody* a, PhysicsBody* b, const Vec2& anchr1, const Vec2& anchr2);
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/** Create a limit joint.
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@param a A is the body to connect.
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@param b B is the body to connect.
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@param anchr1 Anchr1 is the anchor point on body a.
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@param anchr2 Anchr2 is the anchor point on body b.
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@param min Define the allowed min distance of the anchor points.
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@param max Define the allowed max distance of the anchor points.
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@return A object pointer.
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*/
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static PhysicsJointLimit* construct(PhysicsBody* a, PhysicsBody* b, const Vec2& anchr1, const Vec2& anchr2, float min, float max);
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/** Get the anchor point on body a.*/
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Vec2 getAnchr1() const;
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/** Set the anchor point on body a.*/
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void setAnchr1(const Vec2& anchr1);
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/** Get the anchor point on body b.*/
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Vec2 getAnchr2() const;
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/** Set the anchor point on body b.*/
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void setAnchr2(const Vec2& anchr2);
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/** Get the allowed min distance of the anchor points.*/
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float getMin() const;
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/** Set the min distance of the anchor points.*/
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void setMin(float min);
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/** Get the allowed max distance of the anchor points.*/
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float getMax() const;
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/** Set the max distance of the anchor points.*/
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void setMax(float max);
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virtual bool createConstraints() override;
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protected:
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PhysicsJointLimit() {}
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virtual ~PhysicsJointLimit() {}
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Vec2 _anchr1;
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Vec2 _anchr2;
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float _min;
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float _max;
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};
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/**
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* @brief A pin joint allows the two bodies to independently rotate around the anchor point as if pinned together.
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*/
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class CC_DLL PhysicsJointPin : public PhysicsJoint
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{
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public:
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/** Create a pin joint.
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@param a A is the body to connect.
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@param b B is the body to connect.
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@param pivot It's the pivot position.
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@return A object pointer.
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*/
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static PhysicsJointPin* construct(PhysicsBody* a, PhysicsBody* b, const Vec2& pivot);
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/** Create a pin joint.
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@param a A is the body to connect.
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@param b B is the body to connect.
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@param anchr1 Anchr1 is the anchor point on body a.
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@param anchr2 Anchr2 is the anchor point on body b.
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@return A object pointer.
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*/
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static PhysicsJointPin* construct(PhysicsBody* a, PhysicsBody* b, const Vec2& anchr1, const Vec2& anchr2);
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virtual bool createConstraints() override;
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protected:
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PhysicsJointPin() {}
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virtual ~PhysicsJointPin() {}
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bool _useSpecificAnchr;
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Vec2 _anchr1;
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Vec2 _anchr2;
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};
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/** Set the fixed distance with two bodies */
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class CC_DLL PhysicsJointDistance : public PhysicsJoint
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{
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public:
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/** Create a fixed distance joint.
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@param a A is the body to connect.
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@param b B is the body to connect.
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@param anchr1 Anchr1 is the anchor point on body a.
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@param anchr2 Anchr2 is the anchor point on body b.
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@return A object pointer.
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*/
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static PhysicsJointDistance* construct(PhysicsBody* a, PhysicsBody* b, const Vec2& anchr1, const Vec2& anchr2);
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/** Get the distance of the anchor points.*/
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float getDistance() const;
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/** Set the distance of the anchor points.*/
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void setDistance(float distance);
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virtual bool createConstraints() override;
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protected:
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PhysicsJointDistance() {}
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virtual ~PhysicsJointDistance() {}
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Vec2 _anchr1;
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Vec2 _anchr2;
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};
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/** Connecting two physics bodies together with a spring. */
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class CC_DLL PhysicsJointSpring : public PhysicsJoint
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{
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public:
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/** Create a fixed distance joint.
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@param a A is the body to connect.
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@param b B is the body to connect.
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@param anchr1 Anchr1 is the anchor point on body a.
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@param anchr2 Anchr2 is the anchor point on body b.
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@param stiffness It's the spring constant.
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@param damping It's how soft to make the damping of the spring.
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@return A object pointer.
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*/
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static PhysicsJointSpring* construct(PhysicsBody* a, PhysicsBody* b, const Vec2& anchr1, const Vec2& anchr2, float stiffness, float damping);
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/** Get the anchor point on body a.*/
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Vec2 getAnchr1() const;
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/** Set the anchor point on body a.*/
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void setAnchr1(const Vec2& anchr1);
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/** Get the anchor point on body b.*/
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Vec2 getAnchr2() const;
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/** Set the anchor point on body b.*/
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void setAnchr2(const Vec2& anchr2);
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/** Get the distance of the anchor points.*/
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float getRestLength() const;
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/** Set the distance of the anchor points.*/
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void setRestLength(float restLength);
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/** Get the spring constant.*/
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float getStiffness() const;
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/** Set the spring constant.*/
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void setStiffness(float stiffness);
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/** Get the spring soft constant.*/
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float getDamping() const;
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/** Set the spring soft constant.*/
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void setDamping(float damping);
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virtual bool createConstraints() override;
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protected:
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PhysicsJointSpring() {}
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virtual ~PhysicsJointSpring() {}
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Vec2 _anchr1;
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Vec2 _anchr2;
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float _stiffness;
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float _damping;
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};
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/** Attach body a to a line, and attach body b to a dot. */
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class CC_DLL PhysicsJointGroove : public PhysicsJoint
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{
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public:
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/** Create a groove joint.
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@param a A is the body to connect.
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@param b B is the body to connect.
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@param grooveA The line begin position.
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@param grooveB The line end position.
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@param anchr2 Anchr2 is the anchor point on body b.
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@return A object pointer.
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*/
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static PhysicsJointGroove* construct(PhysicsBody* a, PhysicsBody* b, const Vec2& grooveA, const Vec2& grooveB, const Vec2& anchr2);
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/** Get the line begin position*/
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Vec2 getGrooveA() const;
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/** Set the line begin position*/
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void setGrooveA(const Vec2& grooveA);
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/** Get the line end position*/
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Vec2 getGrooveB() const;
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/** Set the line end position*/
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void setGrooveB(const Vec2& grooveB);
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/** Get the anchor point on body b.*/
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Vec2 getAnchr2() const;
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/** Set the anchor point on body b.*/
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void setAnchr2(const Vec2& anchr2);
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virtual bool createConstraints() override;
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protected:
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PhysicsJointGroove() {}
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virtual ~PhysicsJointGroove() {}
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Vec2 _grooveA;
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Vec2 _grooveB;
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Vec2 _anchr2;
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};
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/** Likes a spring joint, but works with rotary. */
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class CC_DLL PhysicsJointRotarySpring : public PhysicsJoint
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{
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public:
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/** Create a damped rotary spring joint.
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@param a A is the body to connect.
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@param b B is the body to connect.
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@param stiffness It's the spring constant.
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@param damping It's how soft to make the damping of the spring.
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@return A object pointer.
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*/
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static PhysicsJointRotarySpring* construct(PhysicsBody* a, PhysicsBody* b, float stiffness, float damping);
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/** Get the relative angle in radians from the body a to b.*/
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float getRestAngle() const;
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/** Set the relative angle in radians from the body a to b.*/
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void setRestAngle(float restAngle);
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/** Get the spring constant.*/
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float getStiffness() const;
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/** Set the spring constant.*/
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void setStiffness(float stiffness);
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/** Get the spring soft constant.*/
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float getDamping() const;
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/** Set the spring soft constant.*/
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void setDamping(float damping);
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virtual bool createConstraints() override;
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protected:
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PhysicsJointRotarySpring() {}
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virtual ~PhysicsJointRotarySpring() {}
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float _stiffness;
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float _damping;
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};
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/** Likes a limit joint, but works with rotary. */
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class CC_DLL PhysicsJointRotaryLimit : public PhysicsJoint
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{
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public:
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/** Create a limit rotary joint.
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@param a A is the body to connect.
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@param b B is the body to connect.
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@param min It's min rotation limit in radians.
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@param max It's max rotation limit in radians.
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@return A object pointer.
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*/
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static PhysicsJointRotaryLimit* construct(PhysicsBody* a, PhysicsBody* b, float min, float max);
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/** Create a limit rotary joint.
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@param a A is the body to connect.
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@param b B is the body to connect.
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@return A object pointer.
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*/
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static PhysicsJointRotaryLimit* construct(PhysicsBody* a, PhysicsBody* b);
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/** Get the min rotation limit.*/
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float getMin() const;
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/** Set the min rotation limit.*/
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void setMin(float min);
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/** Get the max rotation limit.*/
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float getMax() const;
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/** Set the max rotation limit.*/
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void setMax(float max);
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virtual bool createConstraints() override;
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protected:
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PhysicsJointRotaryLimit() {}
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virtual ~PhysicsJointRotaryLimit() {}
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float _min;
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float _max;
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};
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/** Works like a socket wrench. */
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class CC_DLL PhysicsJointRatchet : public PhysicsJoint
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{
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public:
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/** Create a ratchet joint.
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@param a A is the body to connect.
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@param b B is the body to connect.
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@param phase Phase is the initial offset to use when deciding where the ratchet angles are.
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@param ratchet Ratchet is the distance between "clicks".
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@return A object pointer.
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*/
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static PhysicsJointRatchet* construct(PhysicsBody* a, PhysicsBody* b, float phase, float ratchet);
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/** Get the ratchet angle.*/
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float getAngle() const;
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/** Set the ratchet angle.*/
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void setAngle(float angle);
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/** Get the initial offset.*/
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float getPhase() const;
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/** Set the initial offset.*/
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void setPhase(float phase);
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/** Get the distance between "clicks".*/
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float getRatchet() const;
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/** Set the distance between "clicks".*/
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void setRatchet(float ratchet);
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virtual bool createConstraints() override;
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protected:
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PhysicsJointRatchet() {}
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virtual ~PhysicsJointRatchet() {}
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float _phase;
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float _ratchet;
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};
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/** Keeps the angular velocity ratio of a pair of bodies constant. */
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class CC_DLL PhysicsJointGear : public PhysicsJoint
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{
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public:
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/** Create a gear joint.
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@param a A is the body to connect.
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@param b B is the body to connect.
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@param phase Phase is the initial angular offset of the two bodies.
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@param ratio Ratio is always measured in absolute terms.
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@return A object pointer.
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*/
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static PhysicsJointGear* construct(PhysicsBody* a, PhysicsBody* b, float phase, float ratio);
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/** Get the angular offset of the two bodies.*/
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float getPhase() const;
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/** Set the angular offset of the two bodies.*/
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void setPhase(float phase);
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/** Get the ratio.*/
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float getRatio() const;
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/** Set the ratio.*/
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void setRatio(float ratchet);
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virtual bool createConstraints() override;
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protected:
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PhysicsJointGear() {}
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virtual ~PhysicsJointGear() {}
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float _phase;
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float _ratio;
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};
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/** Keeps the relative angular velocity of a pair of bodies constant. */
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class CC_DLL PhysicsJointMotor : public PhysicsJoint
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{
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public:
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/** Create a motor joint.
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@param a A is the body to connect.
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@param b B is the body to connect.
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@param rate Rate is the desired relative angular velocity.
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@return A object pointer.
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*/
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static PhysicsJointMotor* construct(PhysicsBody* a, PhysicsBody* b, float rate);
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/** Get the relative angular velocity.*/
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float getRate() const;
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/** Set the relative angular velocity.*/
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void setRate(float rate);
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virtual bool createConstraints() override;
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protected:
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PhysicsJointMotor() {}
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virtual ~PhysicsJointMotor() {}
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float _rate;
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};
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/** @} */
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/** @} */
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NS_CC_END
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#endif // CC_USE_PHYSICS
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#endif // __CCPHYSICS_JOINT_H__
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