mgccirclescribe.h

《3D游戏引擎设计》的源码

// 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 MGCCIRCLESCRIBE_H
#define MGCCIRCLESCRIBE_H

#include "MgcCircle2.h"
#include "MgcCircle3.h"
#include "MgcSphere.h"

// All functions return 'true' if circle/sphere has been constructed,
// 'false' otherwise (input points are linearly dependent).

// circle containing three 2D points
bool MgcCircumscribe (const MgcVector2& rkV0, const MgcVector2& rkV1,
    const MgcVector2& rkV2, MgcCircle2& rkCircle);

// circle containing three 3D points
bool MgcCircumscribe (const MgcVector3& rkV0, const MgcVector3& rkV1,
    const MgcVector3& rkV2, MgcCircle3& rkCircle);

// sphere containing four 3D points
bool MgcCircumscribe (const MgcVector3& rkV0, const MgcVector3& rkV1,
    const MgcVector3& rkV2, const MgcVector3& rkV3, MgcSphere& rkSphere);

// circle inscribing triangle of three 2D points
bool MgcInscribe (const MgcVector2& rkV0, const MgcVector2& rkV1,
    const MgcVector2& rkV2, MgcCircle2& rkCircle);

// circle inscribing triangle of three 3D points
bool MgcInscribe (const MgcVector3& rkV0, const MgcVector3& rkV1,
    const MgcVector3& rkV2, MgcCircle3& rkCircle);

// sphere inscribing tetrahedron of four 3D points
bool MgcInscribe (const MgcVector3& rkV0, const MgcVector3& rkV1,
    const MgcVector3& rkV2, const MgcVector3& rkV3, MgcSphere& rkSphere);

#endif