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particle.h
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particle.h
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#pragma once
#include <cstdlib>
#include "vector3.h"
struct Particle{
dvec3 pos;
double mass;
dvec3 acc_direct;
double phi_direct;
dvec3 acc_app;
double phi_app;
void clear_pot(){
acc_direct = dvec3(0.0);
phi_direct = 0.0;
acc_app = dvec3(0.0);
phi_app = 0.0;
}
void move_accp(){
acc_app += acc_direct;
phi_app += phi_direct;
acc_direct = 0.0;
phi_direct = 0.0;
}
dvec3 avecdiff_rel() const {
return (acc_app - acc_direct) / acc_direct.abs();
}
double adiff_rel() const {
return (acc_app - acc_direct).abs() / acc_direct.abs();
}
double adiff_abs() const {
return (acc_app - acc_direct).abs();
}
double aabs() const {
return acc_direct.abs();
}
double pdiff_rel() const {
return fabs((phi_app - phi_direct) / phi_direct);
}
double pdiff_abs() const {
return fabs(phi_app - phi_direct);
}
double pabs() const {
return fabs(phi_direct);
}
static dvec3 rand_vec(){
return dvec3(drand48(), drand48(), drand48());
}
static void gen_rand_dist(
const int NP,
Particle ptcl[],
const long seed = 19810614)
{
srand48(seed);
for(int i=0; i<NP; i++){
ptcl[i].pos = rand_vec();
ptcl[i].clear_pot();
}
double msum = 0.0;
for(int i=0; i<NP; i++){
msum +=
(ptcl[i].mass = drand48() * (1.0/NP));
}
#ifndef NON_CHARGE_NEUTRAL
for(int i=0; i<NP; i++){
ptcl[i].mass -= msum / NP;
}
#endif
}
};