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Remapping the paintings after cut

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This commit is contained in:
Noisyfox
2026-05-04 20:32:39 +08:00
parent ded2e72dcc
commit 24458ba5a2
4 changed files with 349 additions and 24 deletions
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68
src/libslic3r/CutUtils.cpp
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@@ -8,11 +8,39 @@
#include "ObjectID.hpp"
#include <boost/log/trivial.hpp>
#include <optional>
namespace Slic3r {
using namespace Geometry;
// Saved painting data for remapping after mesh cutting.
struct SavedPainting {
indexed_triangle_set its; // Original mesh transformed to cut space
TriangleSelector::TriangleSplittingData supported;
TriangleSelector::TriangleSplittingData seam;
TriangleSelector::TriangleSplittingData mmu;
TriangleSelector::TriangleSplittingData fuzzy;
};
// Remap painting data from saved source to a cut result mesh, and set on a volume.
static void remap_and_set_painting(ModelVolume* vol, const indexed_triangle_set& cut_its,
const SavedPainting& saved)
{
auto remap_one = [&](const TriangleSelector::TriangleSplittingData& src_data,
FacetsAnnotation& target_facets) {
if (src_data.bitstream.empty())
return;
auto result = TriangleSelector::remap_painting(saved.its, src_data, cut_its);
if (!result.bitstream.empty())
target_facets.set_data(result);
};
remap_one(saved.supported, vol->supported_facets);
remap_one(saved.seam, vol->seam_facets);
remap_one(saved.mmu, vol->mmu_segmentation_facets);
remap_one(saved.fuzzy, vol->fuzzy_skin_facets);
}
static void apply_tolerance(ModelVolume* vol)
{
ModelVolume::CutInfo& cut_info = vol->cut_info;
@@ -179,7 +207,8 @@ static void process_modifier_cut(ModelVolume* volume, const Transform3d& instanc
}
static void process_solid_part_cut(ModelVolume* volume, const Transform3d& instance_matrix, const Transform3d& cut_matrix,
ModelObjectCutAttributes attributes, ModelObject* upper, ModelObject* lower)
ModelObjectCutAttributes attributes, ModelObject* upper, ModelObject* lower,
const SavedPainting* saved_painting = nullptr)
{
// Perform cut
TriangleMesh upper_mesh, lower_mesh;
@@ -189,18 +218,28 @@ static void process_solid_part_cut(ModelVolume* volume, const Transform3d& insta
if (attributes.has(ModelObjectCutAttribute::KeepAsParts)) {
add_cut_volume(upper_mesh, upper, volume, cut_matrix, "_A");
if (saved_painting && !upper_mesh.empty())
remap_and_set_painting(upper->volumes.back(), upper_mesh.its, *saved_painting);
if (!lower_mesh.empty()) {
add_cut_volume(lower_mesh, upper, volume, cut_matrix, "_B");
if (saved_painting)
remap_and_set_painting(upper->volumes.back(), lower_mesh.its, *saved_painting);
upper->volumes.back()->cut_info.is_from_upper = false;
}
return;
}
if (attributes.has(ModelObjectCutAttribute::KeepUpper))
if (attributes.has(ModelObjectCutAttribute::KeepUpper)) {
add_cut_volume(upper_mesh, upper, volume, cut_matrix);
if (saved_painting && !upper_mesh.empty())
remap_and_set_painting(upper->volumes.back(), upper_mesh.its, *saved_painting);
}
if (attributes.has(ModelObjectCutAttribute::KeepLower) && !lower_mesh.empty())
if (attributes.has(ModelObjectCutAttribute::KeepLower) && !lower_mesh.empty()) {
add_cut_volume(lower_mesh, lower, volume, cut_matrix);
if (saved_painting)
remap_and_set_painting(lower->volumes.back(), lower_mesh.its, *saved_painting);
}
}
static void reset_instance_transformation(ModelObject* object, size_t src_instance_idx,
@@ -321,6 +360,26 @@ const ModelObjectPtrs& Cut::perform_with_plane()
const Transform3d inverse_cut_matrix = cut_transformation.get_rotation_matrix().inverse() * translation_transform(-1. * cut_transformation.get_offset());
for (ModelVolume* volume : mo->volumes) {
// Save painting data before reset_extra_facets() discards it.
// Only for model parts that will be cut (not modifiers/connectors).
std::optional<SavedPainting> saved_painting;
if (volume->is_model_part() && !volume->mesh().empty()) {
SavedPainting sp;
// Get mesh in cut space (same transform as process_volume_cut applies)
TriangleMesh mesh(volume->mesh());
const auto volume_matrix = volume->get_matrix();
mesh.transform(inverse_cut_matrix * instance_matrix * volume_matrix, true);
mesh.transform(m_cut_matrix);
sp.its = std::move(mesh.its);
sp.supported = volume->supported_facets.get_data();
sp.seam = volume->seam_facets.get_data();
sp.mmu = volume->mmu_segmentation_facets.get_data();
sp.fuzzy = volume->fuzzy_skin_facets.get_data();
if (!sp.supported.bitstream.empty() || !sp.seam.bitstream.empty() ||
!sp.mmu.bitstream.empty() || !sp.fuzzy.bitstream.empty())
saved_painting = std::move(sp);
}
volume->reset_extra_facets();
if (!volume->is_model_part()) {
@@ -330,7 +389,8 @@ const ModelObjectPtrs& Cut::perform_with_plane()
process_connector_cut(volume, instance_matrix, m_cut_matrix, m_attributes, upper, lower, dowels);
}
else if (!volume->mesh().empty())
process_solid_part_cut(volume, instance_matrix, m_cut_matrix, m_attributes, upper, lower);
process_solid_part_cut(volume, instance_matrix, m_cut_matrix, m_attributes, upper, lower,
saved_painting ? &*saved_painting : nullptr);
}
// Post-process cut parts