BlitzNext/Runtime/blitz3d/frustum.hpp

#pragma once
#include "geom.hpp"

class Frustum {
	public:
	enum {
		VERT_TLNEAR = 0,
		VERT_TRNEAR,
		VERT_BRNEAR,
		VERT_BLNEAR,
		VERT_TLFAR,
		VERT_TRFAR,
		VERT_BRFAR,
		VERT_BLFAR,
		VERT_EYE
	};
	enum { PLANE_TOP = 0, PLANE_LEFT, PLANE_BOTTOM, PLANE_RIGHT, PLANE_NEAR, PLANE_FAR };
	Frustum();
	Frustum(float nr, float fr, float w, float h);
	Frustum(const Frustum& f, const Transform& t);

	bool cull(const Box& box) const;
	bool cull(const Vector vecs[], int cnt) const;

	const Plane& getPlane(int n) const
	{
		return planes[n];
	}
	const Vector& getVertex(int n) const
	{
		return verts[n];
	}

	private:
	Plane  planes[6];
	Vector verts[9];
	void   makePlanes();
};