void
stl_open_merge(stl_file *stl, char *file)
{
int first_facet;
first_facet = stl->stats.number_of_facets;
stl_initialize(stl);
stl_count_facets(stl, file);
stl_reallocate(stl);
stl_read(stl, first_facet, 0);
}
void
stl_open_merge(stl_file *stl, char *file_to_merge) {
int num_facets_so_far;
stl_type origStlType;
FILE *origFp;
stl_file stl_to_merge;
if (stl->error) return;
/* Record how many facets we have so far from the first file. We will start putting
facets in the next position. Since we're 0-indexed, it'l be the same position. */
num_facets_so_far = stl->stats.number_of_facets;
/* Record the file type we started with: */
origStlType=stl->stats.type;
/* Record the file pointer too: */
origFp=stl->fp;
/* Initialize the sturucture with zero stats, header info and sizes: */
stl_initialize(&stl_to_merge);
stl_count_facets(&stl_to_merge, file_to_merge);
/* Copy what we need to into stl so that we can read the file_to_merge directly into it
using stl_read: Save the rest of the valuable info: */
stl->stats.type=stl_to_merge.stats.type;
stl->fp=stl_to_merge.fp;
/* Add the number of facets we already have in stl with what we we found in stl_to_merge but
haven't read yet. */
stl->stats.number_of_facets=num_facets_so_far+stl_to_merge.stats.number_of_facets;
/* Allocate enough room for stl->stats.number_of_facets facets and neighbors: */
stl_reallocate(stl);
/* Read the file to merge directly into stl, adding it to what we have already.
Start at num_facets_so_far, the index to the first unused facet. Also say
that this isn't our first time so we should augment stats like min and max
instead of erasing them. */
stl_read(stl, num_facets_so_far, 0);
/* Restore the stl information we overwrote (for stl_read) so that it still accurately
reflects the subject part: */
stl->stats.type=origStlType;
stl->fp=origFp;
}
void
TriangleMesh::merge(const TriangleMesh* mesh)
{
// reset stats and metadata
int number_of_facets = this->stl.stats.number_of_facets;
stl_invalidate_shared_vertices(&this->stl);
this->repaired = false;
// update facet count and allocate more memory
this->stl.stats.number_of_facets = number_of_facets + mesh->stl.stats.number_of_facets;
this->stl.stats.original_num_facets = this->stl.stats.number_of_facets;
stl_reallocate(&this->stl);
// copy facets
for (int i = 0; i < mesh->stl.stats.number_of_facets; i++) {
this->stl.facet_start[number_of_facets + i] = mesh->stl.facet_start[i];
}
// update size
stl_get_size(&this->stl);
}
