RaycastCallback.hpp

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#pragma once

#include "Engine/Entity/Entity.hpp"
#include "Engine/Collision/CollisionTypes.hpp"

#include <ThirdParty/Box2D/Box2D/Box2D.h>

namespace Engine
{
    class CollisionSystem;

    class RayCastClosestCallback : public b2RayCastCallback
    {
        friend class CollisionSystem;
    public:
        RayCastClosestCallback();
        RayCastClosestCallback(const CollisionLayer detectLayers);

        float32 ReportFixture(b2Fixture* fixture, const b2Vec2& point, const b2Vec2& normal, float32 fraction) override;

    private:
        eastl::weak_ptr<Entity> entity;
        bool hit;
        b2Vec2 point;
        b2Vec2 normal;
        CollisionLayer detectionLayers;
    };

    class RayCastMultipleCallback : public b2RayCastCallback
    {
        friend class CollisionSystem;
    public:
        enum
        {
            MAX_COUNT = 5
        };

        // Structors
        RayCastMultipleCallback();
        RayCastMultipleCallback(const CollisionLayer detectLayers);

        float32 ReportFixture(b2Fixture* fixture, const b2Vec2& point, const b2Vec2& normal, float32) override;

    private:
        std::weak_ptr<Entity> entities;
        b2Vec2 points[MAX_COUNT];
        b2Vec2 normals[MAX_COUNT];
        CollisionLayer detectionLayers;
        int32 count;
    };
} //namespace Engine