mgcdistcir3cir3.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 MGCDISTCIR3CIR3_H
#define MGCDISTCIR3CIR3_H

#include "MgcCircle3.h"

// Compute the distance between two circles.  In many configurations, there
// is exactly one pair of points that attains minimal distance.  However,
// there are configurations for which two pair of points attain minimal
// distance, for example when the circles are not coplanar and share the same
// center or when the circles are not coplanar yet parallel and their
// projections onto a single parallel plane intersect in two points.  Finally,
// when the two circles are coplanar and share the same center, there are
// infinitely many pairs of points that are equidistant with minimum distance.

MgcReal MgcSqrDistance (const MgcCircle3& rkCircle0,
    const MgcCircle3& rkCircle1, MgcVector3* pkClosest0 = 0,
    MgcVector3* pkClosest1 = 0);

MgcReal MgcDistance (const MgcCircle3& rkCircle0,
    const MgcCircle3& rkCircle1, MgcVector3* pkClosest0 = 0,
    MgcVector3* pkClosest1 = 0);

#endif