/usr/include/snlNurbsCommon.h is in libsnl-dev 0.2.1.svn.18-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 | // libSNL - Simple Nurbs Library
// Copyright Scott A.E. Lanham, Australia.
// ---------------------------------------
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Library General Public License for more details.
//
// You should have received a copy of the GNU Library General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
// *** NURBS routines that don't belong in classes ***
// *** Legacy opencdsm routines are included ***
#include "snlPoint.h"
#include "snlKnotVector.h"
#include "snlSurface.h"
#include "ptrList.h"
#ifdef SGI_MIPS
#include <iostream.h>
#include <math.h>
#else
#include <iostream>
#include <cmath>
using namespace std;
#endif
const int MAX_PROJ_ITER = 64; // Maximum number of newton iterations for projection functions.
typedef struct
{
/* surface location */
knot paramT; // Parameter in t direction.
knot paramU; // Parameter in u direction.
snlPoint pt; // Point corresponding to parameters.
int flag; // Indicates whatever you want ;-)
} sLocn;
typedef struct
{
/* surface location */
knot paramT; // Parameter in t direction.
knot paramU; // Parameter in u direction.
snlPoint pt; // Point corresponding to parameters.
int flag;
basis dist; // Distance from point to surface.
} projLocn;
bool newtonIterStepSurf ( snlPoint* derivPts, snlPoint* projPt, knot* deltaU, knot* deltaV );
bool newtonIterStepCurve ( snlPoint* derivPts, snlPoint* projPt, knot* paramDelta );
bool lineIterStepCurve ( snlPoint* derivPts, snlPoint* projPt, knot* paramDelta );
int solve2X2LinEqn ( double a1, double a2, double a3, double a4,
double b1, double b2, double* x1, double* x2 );
knot paramDistSqrd ( knot t1, knot u1, knot t2, knot u2 );
void resolveAmbig ( sLocn* projns, int projSize, ptrList < sLocn >* ambig );
ptrList < sLocn >* projPtSurf ( snlSurface& surface, snlPoint* toProj, int toProjNum, sLocn* best,
double iterTol, double cosTol, unsigned maxPass );
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