ShapeFrustum.h

#pragma once

namespace ParaEngine
{
    class CShapeAABB;
    class CShapeSphere;

    class CShapeFrustum
    {
    public:
        CShapeFrustum();
        CShapeFrustum(const Matrix4* matrix);

        bool TestSphere     ( const CShapeSphere* sphere ) const;
        bool TestSweptSphere( const CShapeSphere* sphere, const Vector3* sweepDir ) const;
        int  TestBox        ( const CShapeAABB* box ) const;
        
        virtual void UpdateFrustum(const Matrix4* matViewProj, bool bInversedMatrix=false, float fNearPlane = 0.f, float fFarPlane = 1.f);

        inline Plane& GetPlane(int nIndex) {return planeFrustum[nIndex];}

        bool CullPointWithPlane(int iPlane, const Vector3* vPos);

        bool CullPointsWithFrustum(Vector3* pVecBounds, int nCount);

        Vector3 vecFrustum[8];    
        Plane planeFrustum[6];
        int nVertexLUT[6];
    public:
        static bool SweptSpherePlaneIntersect(float& t0, float& t1, const Plane* plane, const CShapeSphere* sphere, const Vector3* sweepDir);
    };
}