63 lines
1.7 KiB
C++
63 lines
1.7 KiB
C++
/* ----------------------------------------------------------------------
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LAMMPS - Large-scale Atomic/Molecular Massively Parallel Simulator
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http://lammps.sandia.gov, Sandia National Laboratories
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Steve Plimpton, sjplimp@sandia.gov
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Copyright (2003) Sandia Corporation. Under the terms of Contract
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DE-AC04-94AL85000 with Sandia Corporation, the U.S. Government retains
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certain rights in this software. This software is distributed under
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the GNU General Public License.
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See the README file in the top-level LAMMPS directory.
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------------------------------------------------------------------------- */
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#include "math.h"
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#include "stdlib.h"
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#include "string.h"
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#include "region_sphere.h"
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#include "error.h"
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using namespace LAMMPS_NS;
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/* ---------------------------------------------------------------------- */
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RegSphere::RegSphere(LAMMPS *lmp, int narg, char **arg) :
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Region(lmp, narg, arg)
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{
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options(narg-6,&arg[6]);
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xc = xscale*atof(arg[2]);
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yc = yscale*atof(arg[3]);
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zc = zscale*atof(arg[4]);
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radius = xscale*atof(arg[5]);
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// error check
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if (radius < 0.0) error->all("Illegal region sphere command");
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// extent of sphere
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extent_xlo = xc - radius;
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extent_xhi = xc + radius;
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extent_ylo = yc - radius;
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extent_yhi = yc + radius;
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extent_zlo = zc - radius;
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extent_zhi = zc + radius;
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}
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/* ---------------------------------------------------------------------- */
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int RegSphere::match(double x, double y, double z)
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{
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double delx = x - xc;
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double dely = y - yc;
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double delz = z - zc;
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double dist = sqrt(delx*delx + dely*dely + delz*delz);
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int inside;
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if (dist <= radius) inside = 1;
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else inside = 0;
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return !(inside ^ interior); // 1 if same, 0 if different
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}
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