Plane2.h

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/*************************************************************************
> File Name: Plane2.h
> Project Name: CubbyFlow
> Author: Chan-Ho Chris Ohk
> Purpose: 2-D plane geometry.
> Created Time: 2017/06/18
> Copyright (c) 2018, Chan-Ho Chris Ohk
*************************************************************************/
#ifndef CUBBYFLOW_PLANE2_H
#define CUBBYFLOW_PLANE2_H

#include <Core/Surface/Surface2.h>

namespace CubbyFlow
{
    class Plane2 final : public Surface2
    {
    public:
        class Builder;

        Vector2D normal = Vector2D(0, 1);

        Vector2D point;

        Plane2(const Transform2& transform = Transform2(), bool isNormalFlipped = false);

        Plane2(const Vector2D& normal, const Vector2D& point,
            const Transform2& transform = Transform2(), bool isNormalFlipped = false);

        Plane2(const Plane2& other);

        static Builder GetBuilder();

    private:
        Vector2D ClosestPointLocal(const Vector2D& otherPoint) const override;

        bool IntersectsLocal(const Ray2D& ray) const override;

        BoundingBox2D BoundingBoxLocal() const override;

        Vector2D ClosestNormalLocal(const Vector2D& otherPoint) const override;

        SurfaceRayIntersection2 ClosestIntersectionLocal(const Ray2D& ray) const override;
    };

    using Plane2Ptr = std::shared_ptr<Plane2>;
    
    class Plane2::Builder final : public SurfaceBuilderBase2<Plane2::Builder>
    {
    public:
        Builder& WithNormal(const Vector2D& normal);

        Builder& WithPoint(const Vector2D& point);

        Plane2 Build() const;

        Plane2Ptr MakeShared() const;

    private:
        Vector2D m_normal{ 0, 1 };
        Vector2D m_point{ 0, 0 };
    };
}

#endif