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//----------------------------------------------------------------------
// File: ANNx.h
// Programmer: Sunil Arya and David Mount
// Description: Internal include file for ANN
// Last modified: 01/27/10 (Version 1.1.2)
//
// These declarations are of use in manipulating some of
// the internal data objects appearing in ANN, but are not
// needed for applications just using the nearest neighbor
// search.
//
// Typical users of ANN should not need to access this file.
//----------------------------------------------------------------------
// Copyright (c) 1997-2010 University of Maryland and Sunil Arya and
// David Mount. All Rights Reserved.
//
// This software and related documentation is part of the Approximate
// Nearest Neighbor Library (ANN). This software is provided under
// the provisions of the Lesser GNU Public License (LGPL). See the
// file ../ReadMe.txt for further information.
//
// The University of Maryland (U.M.) and the authors make no
// representations about the suitability or fitness of this software for
// any purpose. It is provided "as is" without express or implied
// warranty.
//----------------------------------------------------------------------
// History:
// Revision 0.1 03/04/98
// Initial release
// Revision 1.0 04/01/05
// Changed LO, HI, IN, OUT to ANN_LO, ANN_HI, etc.
// Revision 1.1.2 01/27/10
// Fixed minor compilation bugs for new versions of gcc
//----------------------------------------------------------------------
#ifndef ANNx_H
#define ANNx_H
#include <iomanip> // I/O manipulators
#include <ANN/ANN.h> // ANN includes
namespace geom_bt {
//----------------------------------------------------------------------
// Global constants and types
//----------------------------------------------------------------------
enum {ANN_LO=0, ANN_HI=1}; // splitting indices
enum {ANN_IN=0, ANN_OUT=1}; // shrinking indices
// what to do in case of error
enum ANNerr {ANNwarn = 0, ANNabort = 1};
//----------------------------------------------------------------------
// Maximum number of points to visit
// We have an option for terminating the search early if the
// number of points visited exceeds some threshold. If the
// threshold is 0 (its default) this means there is no limit
// and the algorithm applies its normal termination condition.
//----------------------------------------------------------------------
extern int ANNmaxPtsVisited; // maximum number of pts visited
extern int ANNptsVisited; // number of pts visited in search
//----------------------------------------------------------------------
// Global function declarations
//----------------------------------------------------------------------
void annError( // ANN error routine
const char* msg, // error message
ANNerr level); // level of error
void annPrintPt( // print a point
ANNpoint pt, // the point
int dim, // the dimension
std::ostream &out); // output stream
void annAssignRect( // assign one rect to another
int dim, // dimension (both must be same)
ANNorthRect &dest, // destination (modified)
const ANNorthRect &source); // source
//----------------------------------------------------------------------
// Orthogonal (axis aligned) halfspace
// An orthogonal halfspace is represented by an integer cutting
// dimension cd, coordinate cutting value, cv, and side, sd, which is
// either +1 or -1. Our convention is that point q lies in the (closed)
// halfspace if (q[cd] - cv)*sd >= 0.
//----------------------------------------------------------------------
class ANNorthHalfSpace {
public:
int cd; // cutting dimension
ANNcoord cv; // cutting value
int sd; // which side
//
ANNorthHalfSpace() // default constructor
{ cd = 0; cv = 0; sd = 0; }
ANNorthHalfSpace( // basic constructor
int cdd, // dimension of space
ANNcoord cvv, // cutting value
int sdd) // side
{ cd = cdd; cv = cvv; sd = sdd; }
ANNbool in(ANNpoint q) const // is q inside halfspace?
{ return (ANNbool) ((q[cd] - cv)*sd >= 0); }
ANNbool out(ANNpoint q) const // is q outside halfspace?
{ return (ANNbool) ((q[cd] - cv)*sd < 0); }
ANNdist dist(ANNpoint q) const // (squared) distance from q
{ return (ANNdist) ANN_POW(q[cd] - cv); }
void setLowerBound(int d, ANNpoint p)// set to lower bound at p[i]
{ cd = d; cv = p[d]; sd = +1; }
void setUpperBound(int d, ANNpoint p)// set to upper bound at p[i]
{ cd = d; cv = p[d]; sd = -1; }
void project(ANNpoint &q) // project q (modified) onto halfspace
{ if (out(q)) q[cd] = cv; }
};
// array of halfspaces
typedef ANNorthHalfSpace *ANNorthHSArray;
}
#endif
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