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
{
 
class KGE_API PhysicWorld : public Component
{
    friend class PhysicBody;
    friend class Joint;
 
public:
    PhysicWorld();
 
    PhysicWorld(const Vec2& gravity);
 
    virtual ~PhysicWorld();
 
    void AddBody(PhysicBodyPtr body);
 
    void RemoveBody(PhysicBodyPtr body);
 
    void RemoveAllBodies();
 
    const List<PhysicBodyPtr>& GetAllBodies() const;
 
    void AddJoint(JointPtr joint);
 
    void RemoveJoint(JointPtr joint);
 
    void RemoveAllJoints();
 
    const List<JointPtr>& GetAllJoints() const;
 
    Vec2 GetGravity() const;
 
    void SetGravity(Vec2 gravity);
 
    ContactList GetContactList();
 
    void SetVelocityIterations(int vel_iter);
 
    void SetPositionIterations(int pos_iter);
 
    void ShowDebugInfo(bool show);
 
    b2World* GetB2World();
 
    const b2World* GetB2World() const;
 
protected:
    void InitComponent(Actor* actor) override;
 
    void OnUpdate(Duration dt) override;
 
    void OnRender(RenderContext& ctx) override;
 
    void DispatchEvent(Event* evt);
 
    void JointRemoved(b2Joint* b2joint);
 
    void BeforeSimulation(Actor* parent, const Matrix3x2& parent_to_world, float parent_rotation);
 
    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