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ENH: avoid duplicating meshes in boolean 

For UNION and A_NOT_B(difference), the merged parts can be safely skipped.

jira: none
Change-Id: Ie931dba3d3f8c65565ff1f5ac24ff23292f8156f
(cherry picked from commit 37d49a0a49ddc15a187d3fac34b580f3192af86f)
This commit is contained in:
Arthur 2023-12-27 11:52:14 +08:00 committed by Lane.Wei
parent 249ee5b766
commit ec30954782
1 changed files with 3 additions and 1 deletions
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4
src/libslic3r/MeshBoolean.cpp
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@ -776,12 +776,14 @@ void do_boolean(McutMesh& srcMesh, const McutMesh& cutMesh, const std::string& b
// But we can force it to work by spliting the src mesh into disconnected components,
// and do booleans seperately, then merge all the results.
indexed_triangle_set all_its;
std::vector<bool> has_been_merged(cut_parts.size(), false);
if (boolean_opts == "UNION" || boolean_opts == "A_NOT_B") {
for (size_t i = 0; i < src_parts.size(); i++) {
auto src_part = triangle_mesh_to_mcut(src_parts[i]);
for (size_t j = 0; j < cut_parts.size(); j++) {
if (has_been_merged[j]) continue; // assume union is done first, then we can safely skip the merged parts for A_NOT_B
auto cut_part = triangle_mesh_to_mcut(cut_parts[j]);
bool success = do_boolean_single(*src_part, *cut_part, boolean_opts);
has_been_merged[j] = do_boolean_single(*src_part, *cut_part, boolean_opts);
}
TriangleMesh tri_part = mcut_to_triangle_mesh(*src_part);
its_merge(all_its, tri_part.its);