rigidbody2d.h

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#pragma once

#include <box2d/box2d.h>
#include <glm/glm.hpp>
#include <glm/gtc/matrix_transform.hpp>
#include "../components/component.h"

static const b2Vec2 gravity(0.0f, -10.0f);
static b2World World(gravity);

namespace fireworks { namespace physics { 

    const float M2PX = 250.0f, M2PY = 150.0f;
    const float P2MX = 1.0f / M2PX, P2MY = 1.0f / M2PY;

    enum RigidBodyType
    {
        Static = b2_staticBody,
        Dynamic = b2_dynamicBody,
        Kinematic = b2_kinematicBody
    };
    
    class RigidBody2D : public components::Component
    {
    public:
        RigidBodyType                       bodyType;
        float                               density;
        float                               friction;
        float                               resitution;
        float                               gravityScale;
        bool                                fixedRotation;
    private:
        b2World&                            m_World;
        b2BodyDef                           m_BodyDef;
        b2Body*                             m_Body;
        b2PolygonShape                      m_Shape;
        b2FixtureDef                        m_Fixture;

        bool                                m_DidGenerateRB;
    public:
        RigidBody2D(float density, float friction, RigidBodyType bodytype, b2World& world = World);
        ~RigidBody2D();

        glm::vec3 GetPositionInMeters();
        glm::vec3 GetPositionInPixels();
        float GetRotation();

        void AddForce(glm::vec2 direction, float force);
        void SetVelocity(glm::vec2 velocity);
        void SetPosition(const glm::vec3& position);
        void SetSize(glm::vec2& size);
        void GenerateRigidBody(glm::vec3 pos, glm::vec2 dim);

        inline b2Body* GetBody() { return  m_Body; }
    };

} }