3DPrinting/PrusaSlicer-NonPlainar
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Fixed the bottom layer of multi-material painted objects sunken below the print bed (#7107).

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This commit is contained in:
Lukáš Hejl 2021-10-22 12:17:42 +02:00
parent 7c00905ec7
commit 3d87904e66
1 changed files with 23 additions and 1 deletions
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22
src/libslic3r/MultiMaterialSegmentation.cpp
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@ -1252,6 +1252,14 @@ static void cut_segmented_layers(const std::vector<ExPolygons>
BOOST_LOG_TRIVIAL(debug) << "MMU segmentation - cutting segmented layers in parallel - end";
}
static bool is_volume_sinking(const indexed_triangle_set &its, const Transform3d &trafo)
{
const Transform3f trafo_f = trafo.cast<float>();
for (const stl_vertex &vertex : its.vertices)
if ((trafo_f * vertex).z() < SINKING_Z_THRESHOLD) return true;
return false;
}
//#define MMU_SEGMENTATION_DEBUG_TOP_BOTTOM
// Returns MMU segmentation of top and bottom layers based on painting in MMU segmentation gizmo
@ -1298,6 +1306,20 @@ static inline std::vector<std::vector<ExPolygons>> mmu_segmentation_top_and_bott
#endif // MMU_SEGMENTATION_DEBUG_TOP_BOTTOM
if (! painted.indices.empty()) {
std::vector<Polygons> top, bottom;
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);
MeshSlicingParams slicing_params;
slicing_params.trafo = volume_trafo;
Polygons bottom_slice = slice_mesh(painted, zs[0], slicing_params);
top.erase(top.begin());
bottom.erase(bottom.begin());
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);
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(); });