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manifold_cylinder_dent.cpp
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Created
Wed, Oct 16, 00:49
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983 B
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Fri, Oct 18, 00:49 (1 d, 23 h)
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rLAMMPS lammps
manifold_cylinder_dent.cpp
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#include "manifold_cylinder_dent.h"
#include "math_const.h"
#include <math.h>
using namespace LAMMPS_NS;
using namespace user_manifold;
manifold_cylinder_dent::manifold_cylinder_dent( LAMMPS *lmp, int argc,
char **argv ) : manifold(lmp)
{}
double manifold_cylinder_dent::g( const double *x )
{
double l = params[1], R = params[0], a = params[2];
double r2 = x[1]*x[1] + x[0]*x[0];
if( fabs(x[2]) < 0.5*l ){
double k = MathConst::MY_2PI / l;
double c = R - 0.5*a*( 1.0 + cos(k*x[2]) );
return c*c - r2;
}else{
return R*R - r2;
}
}
void manifold_cylinder_dent::n( const double *x, double *n )
{
double l = params[1], R = params[0], a = params[2];
if( fabs(x[2]) < 0.5*l ){
double k = MathConst::MY_2PI / l;
double c = R - 0.5*a*(1.0 + cos(k*x[2]));
n[0] = -2*x[0];
n[1] = -2*x[1];
n[2] = c*a*k*sin(k*x[2]);
}else{
n[0] = -2*x[0];
n[1] = -2*x[1];
n[2] = 0.0;
}
}
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