120ca87015
git-svn-id: https://free-cad.svn.sourceforge.net/svnroot/free-cad/trunk@5000 e8eeb9e2-ec13-0410-a4a9-efa5cf37419d
103 lines
3.8 KiB
C++
103 lines
3.8 KiB
C++
// Wild Magic Source Code
|
|
// David Eberly
|
|
// http://www.geometrictools.com
|
|
// Copyright (c) 1998-2007
|
|
//
|
|
// This library is free software; you can redistribute it and/or modify it
|
|
// under the terms of the GNU Lesser General Public License as published by
|
|
// the Free Software Foundation; either version 2.1 of the License, or (at
|
|
// your option) any later version. The license is available for reading at
|
|
// either of the locations:
|
|
// http://www.gnu.org/copyleft/lgpl.html
|
|
// http://www.geometrictools.com/License/WildMagicLicense.pdf
|
|
// The license applies to versions 0 through 4 of Wild Magic.
|
|
//
|
|
// Version: 4.0.0 (2006/06/28)
|
|
|
|
#ifndef WM4MAPPER2_H
|
|
#define WM4MAPPER2_H
|
|
|
|
#include "Wm4FoundationLIB.h"
|
|
#include "Wm4Vector2.h"
|
|
|
|
namespace Wm4
|
|
{
|
|
|
|
template <class Real>
|
|
class Mapper2
|
|
{
|
|
public:
|
|
// Construction and destruction. The value of epsilon is used as a
|
|
// relative error when computing the dimension of the point set.
|
|
Mapper2 (int iVQuantity, const Vector2<Real>* akVertex, Real fEpsilon);
|
|
~Mapper2 ();
|
|
|
|
// Axis-aligned bounding box of the input points.
|
|
const Vector2<Real>& GetMin () const;
|
|
const Vector2<Real>& GetMax () const;
|
|
Real GetMaxRange () const;
|
|
|
|
// Dimension d of the set (0, 1, or 2).
|
|
int GetDimension () const;
|
|
|
|
// Coordinate system. The origin is valid for any dimension d. The
|
|
// unit-length direction vector is valid only for 0 <= i < d. The extreme
|
|
// index is relative to the array of input points, and is also valid only
|
|
// for 0 <= i < d. If d = 0, all points are effectively the same, but the
|
|
// use of an epsilon may lead to an extreme index that is not zero. If
|
|
// d = 1, all points effectively lie on a line segment. The extreme
|
|
// indices correspond to input points that are the end points of the
|
|
// segment. If d = 2, the first two extreme indices correspond to a
|
|
// line segment. The next extreme index corresponds to the input point
|
|
// that is farthest from this line segment in the direction perpendicular
|
|
// to the segment.
|
|
const Vector2<Real>& GetOrigin () const;
|
|
const Vector2<Real>& GetDirection (int i) const;
|
|
int GetExtremeIndex (int i) const;
|
|
|
|
// If d = 2, the direction vectors {U0,U1} form a right-handed set. The
|
|
// three extreme points form a triangle. This function indicates if that
|
|
// triangle is counterclockwise ordered.
|
|
bool GetExtremeCCW () const;
|
|
|
|
private:
|
|
// Axis-aligned bounding box of input points. The maximum range is the
|
|
// larger of max[0]-min[0] and max[1]-min[1].
|
|
Vector2<Real> m_kMin, m_kMax;
|
|
Real m_fMaxRange;
|
|
|
|
// The intrinsic dimension of the input set. The parameter fEpsilon to
|
|
// the constructor is used to provide a tolerance when determining the
|
|
// dimension.
|
|
int m_iDimension;
|
|
|
|
// The indices that define the maximum dimensional extents. The values
|
|
// m_aiExtreme[0] and m_aiExtreme[1] are the indices for the vertices
|
|
// which define the largest extent in one of the coordinate axis
|
|
// directions. If the intrinsic dimensionality is 2, then m_aiExtreme[2]
|
|
// is the index for the vertex which causes the largest extent in the
|
|
// direction perpendicular to the line through the vertices corresponding
|
|
// to m_aiExtreme[0] and m_aiExtreme[1]. The triangle
|
|
// <V[extreme0],V[extreme1],V[extreme2]> can be clockwise or
|
|
// counterclockwise, the condition stored in m_bExtremeCCW.
|
|
int m_aiExtreme[3];
|
|
bool m_bExtremeCCW;
|
|
|
|
// See the comments describing the member functions which return these
|
|
// values.
|
|
Vector2<Real> m_kOrigin;
|
|
Vector2<Real> m_akDirection[2];
|
|
};
|
|
|
|
} //namespace Wm4
|
|
|
|
#include "Wm4Mapper2.inl"
|
|
|
|
namespace Wm4
|
|
{
|
|
typedef Mapper2<float> Mapper2f;
|
|
typedef Mapper2<double> Mapper2d;
|
|
}
|
|
|
|
#endif
|