$#include "Math/Frustum.h"

enum FrustumPlane
{
    PLANE_NEAR = 0,
    PLANE_LEFT,
    PLANE_RIGHT,
    PLANE_UP,
    PLANE_DOWN,
    PLANE_FAR,
};

static const unsigned NUM_FRUSTUM_PLANES;
static const unsigned NUM_FRUSTUM_VERTICES;

class Frustum
{
    Frustum();
    Frustum(const Frustum& frustum);
    ~Frustum();

    void Define(float fov, float aspectRatio, float zoom, float nearZ, float farZ, const Matrix3x4& transform = Matrix3x4::IDENTITY);
    void Define(const Vector3& near, const Vector3& far, const Matrix3x4& transform = Matrix3x4::IDENTITY);
    void Define(const BoundingBox& box, const Matrix3x4& transform = Matrix3x4::IDENTITY);
    void Define(const Matrix4& projection);
    void DefineOrtho(float orthoSize, float aspectRatio, float zoom, float nearZ, float farZ, const Matrix3x4& transform = Matrix3x4::IDENTITY);
    void DefineSplit(const Matrix4& projection, float near, float far);
    void Transform(const Matrix3& transform);
    void Transform(const Matrix3x4& transform);
    
    Intersection IsInside(const Vector3& point) const;
    Intersection IsInside(const Sphere& sphere) const;
    Intersection IsInsideFast(const Sphere& sphere) const;
    Intersection IsInside(const BoundingBox& box) const;
    Intersection IsInsideFast(const BoundingBox& box) const;
    float Distance(const Vector3& point) const;
    
    Frustum Transformed(const Matrix3& transform) const;
    Frustum Transformed(const Matrix3x4& transform) const;
    Rect Projected(const Matrix4& transform) const;
    void UpdatePlanes();
};