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ENH: add vertical support enforcer

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Previously painting support enforces on vertical faces doesn't work, as projecting the facets downwards will give empty polygons.
Now we use a different mechanism to enable vertical paint-on enforces, by directly adding contact nodes.
Note: this feature only works with tree support as only tree support has contact nodes.

jira: none
Change-Id: Id171b1665566d142a6427285baccb40c0aa00949
(cherry picked from commit 9c882f61eb37350a4486df58de48f0ae489f2d15)
(cherry picked from commit 68625a6e601e2feef8e56693da1f58372b27b560)
This commit is contained in:
Arthur 2024-03-21 16:43:45 +08:00 • committed by Noisyfox
parent 5054ee8508
commit ae6fadda4d
8 changed files with 70 additions and 17 deletions
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4
src/libslic3r/MultiMaterialSegmentation.cpp
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@ -1363,7 +1363,7 @@ static inline std::vector<std::vector<ExPolygons>> mmu_segmentation_top_and_bott
if (!zs.empty() && is_volume_sinking(painted, volume_trafo)) {
std::vector<float> zs_sinking = {0.f};
Slic3r::append(zs_sinking, zs);
slice_mesh_slabs(painted, zs_sinking, volume_trafo, max_top_layers > 0 ? &top : nullptr, max_bottom_layers > 0 ? &bottom : nullptr, throw_on_cancel_callback);
slice_mesh_slabs(painted, zs_sinking, volume_trafo, max_top_layers > 0 ? &top : nullptr, max_bottom_layers > 0 ? &bottom : nullptr, nullptr, throw_on_cancel_callback);
MeshSlicingParams slicing_params;
slicing_params.trafo = volume_trafo;
@ -1374,7 +1374,7 @@ static inline std::vector<std::vector<ExPolygons>> mmu_segmentation_top_and_bott
bottom[0] = union_(bottom[0], bottom_slice);
} else
slice_mesh_slabs(painted, zs, volume_trafo, max_top_layers > 0 ? &top : nullptr, max_bottom_layers > 0 ? &bottom : nullptr, throw_on_cancel_callback);
slice_mesh_slabs(painted, zs, volume_trafo, max_top_layers > 0 ? &top : nullptr, max_bottom_layers > 0 ? &bottom : nullptr, nullptr, throw_on_cancel_callback);
auto merge = [](std::vector<Polygons> &&src, std::vector<Polygons> &dst) {
auto it_src = find_if(src.begin(), src.end(), [](const Polygons &p){ return ! p.empty(); });
if (it_src != src.end()) {