Magic_Game/src/kiwano-physics/PhysicWorld.h

// Copyright (c) 2018-2019 Kiwano - Nomango
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

#pragma once
#include <kiwano-physics/PhysicBody.h>
#include <kiwano-physics/Joint.h>

namespace kiwano
{
namespace physics
{

/**
 * \~chinese
 * \defgroup Physics <EFBFBD><EFBFBD><EFBFBD><EFBFBD>ģ<EFBFBD><EFBFBD>
 */

/**
 * \addtogroup Physics
 * @{
 */

/**
 * \~chinese
 * @brief <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
 */
class KGE_API PhysicWorld : public Component
{
    friend class PhysicBody;
    friend class Joint;

public:
    /// \~chinese
    /// @brief <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
    static PhysicWorldPtr Create();

    /// \~chinese
    /// @brief <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
    /// @param gravity <20><><EFBFBD><EFBFBD>
    static PhysicWorldPtr Create(const Vec2& gravity);

    PhysicWorld();

    virtual ~PhysicWorld();

    /// \~chinese
    /// @brief <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
    void AddBody(PhysicBodyPtr body);

    /// \~chinese
    /// @brief <20>Ƴ<EFBFBD><C6B3><EFBFBD><EFBFBD><EFBFBD>
    void RemoveBody(PhysicBodyPtr body);

    /// \~chinese
    /// @brief <20>Ƴ<EFBFBD><C6B3><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
    void RemoveAllBodies();

    /// \~chinese
    /// @brief <20><>ȡ<EFBFBD><C8A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
    const List<PhysicBodyPtr>& GetAllBodies() const;

    /// \~chinese
    /// @brief <20><><EFBFBD>ӹؽ<D3B9>
    void AddJoint(JointPtr joint);

    /// \~chinese
    /// @brief <20>Ƴ<EFBFBD><C6B3>ؽ<EFBFBD>
    void RemoveJoint(JointPtr joint);

    /// \~chinese
    /// @brief <20>Ƴ<EFBFBD><C6B3><EFBFBD><EFBFBD>йؽ<D0B9>
    void RemoveAllJoints();

    /// \~chinese
    /// @brief <20><>ȡ<EFBFBD><C8A1><EFBFBD>йؽ<D0B9>
    const List<JointPtr>& GetAllJoints() const;

    /// \~chinese
    /// @brief <20><>ȡ<EFBFBD><C8A1><EFBFBD><EFBFBD> [N]
    Vec2 GetGravity() const;

    /// \~chinese
    /// @brief <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> [N]
    void SetGravity(Vec2 gravity);

    /// \~chinese
    /// @brief <20><>ȡ<EFBFBD><C8A1><EFBFBD><EFBFBD><EFBFBD>Ӵ<EFBFBD><D3B4>б<EFBFBD>
    ContactList GetContactList();

    /// \~chinese
    /// @brief <20><><EFBFBD><EFBFBD><EFBFBD>ٶȵ<D9B6><C8B5><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>, Ĭ<><C4AC>Ϊ 6
    void SetVelocityIterations(int vel_iter);

    /// \~chinese
    /// @brief <20><><EFBFBD><EFBFBD>λ<EFBFBD>õ<EFBFBD><C3B5><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>, Ĭ<><C4AC>Ϊ 2
    void SetPositionIterations(int pos_iter);

    /// \~chinese
    /// @brief <20><><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><C7B7><EFBFBD><EFBFBD>Ƶ<EFBFBD><C6B5><EFBFBD><EFBFBD><EFBFBD>Ϣ
    void ShowDebugInfo(bool show);

    /// \~chinese
    /// @brief <20><>ȡb2World
    b2World* GetB2World();

    /// \~chinese
    /// @brief <20><>ȡb2World
    const b2World* GetB2World() const;

protected:
    /// \~chinese
    /// @brief <20><>ʼ<EFBFBD><CABC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
    void InitComponent(Actor* actor) override;

    /// \~chinese
    /// @brief <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
    void OnUpdate(Duration dt) override;

    /// \~chinese
    /// @brief <20><>Ⱦ<EFBFBD><C8BE><EFBFBD><EFBFBD>
    void OnRender(RenderContext& ctx) override;

    /// \~chinese
    /// @brief <20>ַ<EFBFBD><D6B7><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>¼<EFBFBD>
    void DispatchEvent(Event* evt);

    /// \~chinese
    /// @brief <20>ؽ<EFBFBD><D8BD>Ƴ<EFBFBD>ʱ<EFBFBD>Ļص<C4BB><D8B5><EFBFBD><EFBFBD><EFBFBD>
    void JointRemoved(b2Joint* b2joint);

    /// \~chinese
    /// @brief <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǰ
    void BeforeSimulation(Actor* parent, const Matrix3x2& parent_to_world, float parent_rotation);

    /// \~chinese
    /// @brief <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
    void AfterSimulation(Actor* parent, const Matrix3x2& parent_to_world, float parent_rotation);

private:
    bool    debug_;
    int     vel_iter_;
    int     pos_iter_;
    b2World world_;

    class DebugDrawer;
    std::unique_ptr<DebugDrawer> drawer_;

    List<PhysicBodyPtr> bodies_;
    List<JointPtr>      joints_;

    std::unique_ptr<b2DestructionListener> destroy_listener_;
    std::unique_ptr<b2ContactListener>     contact_listener_;
};

/** @} */

inline void PhysicWorld::SetVelocityIterations(int vel_iter)
{
    vel_iter_ = vel_iter;
}

inline void PhysicWorld::SetPositionIterations(int pos_iter)
{
    pos_iter_ = pos_iter;
}

}  // namespace physics
}  // namespace kiwano