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#include "fracture.h"
uint_t *get_voro_dual_edges(uint_t num_edges,
uint_t num_verts, uint_t *edges,
uint_t *triangles) {
uint_t *dual_edges =
(uint_t *)malloc(2 * num_edges * sizeof(uint_t));
uint_t place = 0;
for (uint_t i = 0; i < num_edges; i++) {
uint_t v1, v2;
v1 = edges[2 * i];
v2 = edges[2 * i + 1];
if (v1 < num_verts && v2 < num_verts) {
bool found_match = false;
for (uint_t j = 0; j < 3; j++) {
for (uint_t k = 0; k < 3; k++) {
uint_t t11, t12, t21, t22;
t11 = triangles[3 * v1 + j];
t12 = triangles[3 * v1 + ((j + 1) % 3)];
t21 = triangles[3 * v2 + k];
t22 = triangles[3 * v2 + ((k + 1) % 3)];
if ((t11 == t21 && t12 == t22) || (t11 == t22 && t12 == t21)) {
dual_edges[2 * place] = t11 < t12 ? t11 : t12;
dual_edges[2 * place + 1] = t11 < t12 ? t12 : t11;
place++;
found_match = true;
break;
}
}
if (found_match)
break;
}
}
}
return dual_edges;
}
frame_t *frame_create_voronoi(uint_t L, bool dual, bool hyperuniform) {
double *dvx = NULL;
uint_t dnv = 2 * pow(L / 2, 2);
{
gsl_rng *r = gsl_rng_alloc(gsl_rng_mt19937);
gsl_rng_set(r, rand_seed());
if (hyperuniform) {
dvx = genfunc_hyperuniform(dnv, r);
} else {
dvx = genfunc_uniform(dnv, r);
}
gsl_rng_free(r);
}
// retrieve a periodic voronoi tesselation of the lattice
intptr_t *vout = run_voronoi(dnv, dvx, true, 0, 1, 0, 1);
uint_t nv = ((uint_t *)vout[0])[0];
uint_t ne = ((uint_t *)vout[0])[1];
double *vx = (double *)vout[2];
uint_t *ev = (uint_t *)vout[3];
uint_t *voro_tris = (uint_t *)vout[5];
free((void *)vout[0]);
free((void *)vout[1]);
free((void *)vout[4]);
free(vout);
// get dual edges of the fully periodic graph
uint_t *dev = get_voro_dual_edges(ne, nv, ev, voro_tris);
frame_t *frame = (frame_t *)malloc(sizeof(frame_t));
frame->ne = ne;
// when use_dual is specificed, the edge and vertex sets are swapped with the
// dual edge and dual vertex sets. once formally relabelled, everything
// works the same way
if (dual) {
frame->nv = dnv;
frame->dnv = nv;
frame->ev = dev;
frame->dev = ev;
frame->vx = dvx;
frame->dvx = vx;
} else {
frame->nv = nv;
frame->dnv = dnv;
frame->ev = ev;
frame->dev = dev;
frame->vx = vx;
frame->dvx = dvx;
}
return frame;
}
frame_t *frame_create_square(uint_t L, bool dual) {
uint_t nv = 2 * pow(L / 2, 2);
uint_t ne = pow(L, 2);
uint_t *ev = (uint_t *)malloc(2 * ne * sizeof(uint_t));
uint_t *dev = (uint_t *)malloc(2 * ne * sizeof(uint_t));
double *vx = (double *)malloc(2 * nv * sizeof(double));
double *dvx = (double *)malloc(2 * nv * sizeof(double));
for (uint_t i = 0; i < ne; i++) {
uint_t x = i / L;
uint_t y = i % L;
ev[2 * i] = (L * x) / 2 + ((y + x % 2) / 2) % (L / 2);
ev[2 * i + 1] = ((L * (x + 1)) / 2 + ((y + (x + 1) % 2) / 2) % (L / 2)) % nv;
dev[2 * i] = (L * x) / 2 + ((y + (x + 1) % 2) / 2) % (L / 2);
dev[2 * i + 1] = ((L * (x + 1)) / 2 + ((y + x % 2) / 2) % (L / 2)) % nv;
}
double dx = 1. / L;
for (uint_t i = 0; i < nv; i++) {
vx[2 * i] = dx * ((1 + i / (L / 2)) % 2 + 2 * (i % (L / 2)));
vx[2 * i + 1] = dx * (i / (L / 2));
dvx[2 * i] = dx * ((i / (L / 2)) % 2 + 2 * (i % (L / 2)));
dvx[2 * i + 1] = dx * (i / (L / 2));
}
frame_t *frame = (frame_t *)malloc(sizeof(frame_t));
frame->ne = ne;
frame->nv = nv;
frame->dnv = nv;
if (dual) {
frame->ev = dev;
frame->dev = ev;
frame->vx = dvx;
frame->dvx = vx;
} else {
frame->ev = ev;
frame->dev = dev;
frame->vx = vx;
frame->dvx = dvx;
}
return frame;
}
frame_t *frame_create(lattice_t lattice, uint_t L, bool dual) {
switch (lattice) {
case (SQUARE_LATTICE):
return frame_create_square(L, dual);
case (VORONOI_LATTICE):
return frame_create_voronoi(L, dual, false);
case (VORONOI_HYPERUNIFORM_LATTICE):
return frame_create_voronoi(L, dual, true);
}
}
void frame_free(frame_t *frame) {
free(frame->ev);
free(frame->dev);
free(frame->vx);
free(frame->dvx);
free(frame);
}
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