void find_parents(int64_t ngroups) {
int64_t i, j, *halo_order = NULL;
struct fast3tree_results *nearest;
struct fast3tree *halo_tree;
FAST3TREE_TYPE *h1, *h2;
float max_dist = BOX_SIZE/2.01, range;
halo_order = check_realloc(halo_order, sizeof(int64_t)*ngroups,
"Allocating halo order.");
halo_tree = fast3tree_init(ngroups, GROUP_LIST);
for (i=0; i<ngroups; i++) {
GROUP_LIST[i].parent = -1;
halo_order[i] = i;
}
qsort(halo_order, ngroups, sizeof(int64_t), sort_halo_order);
nearest = fast3tree_results_init();
for (i=0; i<ngroups; i++) {
h1 = &(GROUP_LIST[halo_order[i]]);
range = h1->RADIUS*RADIUS_CONVERSION;
if (max_dist < range) range = max_dist;
fast3tree_find_sphere_periodic(halo_tree, nearest, h1->pos, range);
for (j=0; j<nearest->num_points; j++) {
h2 = nearest->points[j];
if (h2->RADIUS < h1->RADIUS) h2->parent = h1->id;
}
}
fast3tree_results_free(nearest);
fast3tree_free(&halo_tree);
free(halo_order);
}
static PyObject * uberseg_tree(PyObject* self, PyObject* args) {
int x=0,y=0,k=0,segmin=0;
float dmin=0,r=0,dx=0,d=0;
float pos[2],fac=0;
PyObject* seg = NULL;
PyObject* weight = NULL;
int Nx;
int Ny;
int object_number;
PyObject* obj_inds_x = NULL;
PyObject* obj_inds_y = NULL;
int Ninds;
int *ptrx,*ptry,*ptrs;
float *ptrw;
struct mytype *obj = NULL;
struct fast3tree *tree = NULL;
struct fast3tree_results *res = NULL;
if (!PyArg_ParseTuple(args, (char*)"OOiiiOOi", &seg, &weight, &Nx, &Ny, &object_number, &obj_inds_x, &obj_inds_y, &Ninds)) {
return NULL;
}
obj = (struct mytype *)malloc(sizeof(struct mytype)*Ninds);
if(obj == NULL) exit(1);
for(k=0;k<Ninds;++k) {
ptrx = (int*)PyArray_GETPTR1(obj_inds_x,k);
ptry = (int*)PyArray_GETPTR1(obj_inds_y,k);
ptrs = (int*)PyArray_GETPTR2(seg,*ptrx,*ptry);
obj[k].idx = k;
obj[k].seg = *ptrs;
obj[k].pos[0] = (float)(*ptrx);
obj[k].pos[1] = (float)(*ptry);
}
tree = fast3tree_init(Ninds,obj);
if(tree == NULL) exit(1);
res = fast3tree_results_init();
if(res == NULL) exit(1);
float maxr = 1.1*sqrt(Nx*Nx+Ny*Ny);
for(x=0;x<Nx;++x) {
for(y=0;y<Ny;++y) {
//shortcuts
ptrs = (int*)PyArray_GETPTR2(seg,x,y);
if(*ptrs == object_number)
continue;
if(*ptrs > 0 && *ptrs != object_number) {
ptrw = (float*)PyArray_GETPTR2(weight,x,y);
*ptrw = 0.0;
continue;
}
//must do search
pos[0] = (float)x;
pos[1] = (float)y;
r = fast3tree_find_next_closest_distance(tree,res,pos);
fac = 1.0/1.1;
do {
fac *= 1.1;
fast3tree_results_clear(res);
fast3tree_find_sphere(tree,res,pos,r*fac);
} while(res->num_points == 0 && r*fac <= maxr);
segmin = -1;
for(k=0;k<res->num_points;++k) {
dx = res->points[k]->pos[0]-x;
d = dx*dx;
dx = res->points[k]->pos[1]-y;
d += dx*dx;
if(segmin == -1 || d < dmin) {
segmin = res->points[k]->seg;
dmin = d;
}
}
if(segmin == -1) {
continue;
}
if(segmin != object_number) {
ptrw = (float*)PyArray_GETPTR2(weight,x,y);
*ptrw = 0.0;
}
}
}
free(obj);
fast3tree_free(&tree);
fast3tree_results_free(res);
Py_INCREF(Py_None);
return Py_None;
}
