mgcintrplnelp3.h

3D Game Engine Design Source Code非常棒

// Magic Software, Inc.
// http://www.magic-software.com
// Copyright (c) 2000, All Rights Reserved
//
// Source code from Magic Software is supplied under the terms of a license
// agreement and may not be copied or disclosed except in accordance with the
// terms of that agreement.  The various license agreements may be found at
// the Magic Software web site.  This file is subject to the license
//
// FREE SOURCE CODE
// http://www.magic-software.com/License/free.pdf

#ifndef MGCINTRPLNELP3_H
#define MGCINTRPLNELP3_H

#include "MgcEllipsoid.h"
#include "MgcPlane.h"

// The boolean bUnitNormal is a hint about whether or not the plane normal
// is unit length.  If it is not, the length must be calculated by these
// routines.  For batch calls, the plane normal should be unitized in advance
// to avoid the expensive length calculation.  The inverse of the ellipsoid
// matrix (MgcEllipsoid::InverseA()) is assumed to be valid.

bool MgcTestIntersection (const MgcPlane& rkPlane,
    const MgcEllipsoid& rkEllipsoid, bool bUnitNormal);

// Culling support.  View frustum is assumed to be on the positive side of
// the plane.  Ellipsoid is culled if it is on the negative side.
bool MgcCulled (const MgcPlane& rkPlane, const MgcEllipsoid& rkEllipsoid,
    bool bUnitNormal);

#endif