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);
}
void
stl_translate(stl_file *stl, float x, float y, float z)
{
int i;
int j;
for(i = 0; i < stl->stats.number_of_facets; i++)
{
for(j = 0; j < 3; j++)
{
stl->facet_start[i].vertex[j].x += x;
stl->facet_start[i].vertex[j].y += y;
stl->facet_start[i].vertex[j].z += z;
}
}
stl->stats.min.x += x;
stl->stats.min.y += y;
stl->stats.min.z += z;
stl->stats.max.x += x;
stl->stats.max.y += y;
stl->stats.max.z += z;
stl_invalidate_shared_vertices(stl);
}
void
stl_scale(stl_file *stl, float factor)
{
int i;
int j;
// scale extents
stl->stats.min.x *= factor;
stl->stats.min.y *= factor;
stl->stats.min.z *= factor;
stl->stats.max.x *= factor;
stl->stats.max.y *= factor;
stl->stats.max.z *= factor;
// scale size
stl->stats.size.x *= factor;
stl->stats.size.y *= factor;
stl->stats.size.z *= factor;
// scale volume
if (stl->stats.volume > 0.0) {
stl->stats.volume *= (factor * factor * factor);
}
for(i = 0; i < stl->stats.number_of_facets; i++)
{
for(j = 0; j < 3; j++)
{
stl->facet_start[i].vertex[j].x *= factor;
stl->facet_start[i].vertex[j].y *= factor;
stl->facet_start[i].vertex[j].z *= factor;
}
}
stl_invalidate_shared_vertices(stl);
}
