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ENH: optimize area of top surface

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Signed-off-by: salt.wei <salt.wei@bambulab.com>
Change-Id: Ia3d1be6ad3b9f55ee1acda14d0be955055f6dfcb
(cherry picked from commit 448fd3043950613a4d91df256fa9ee52a57fcaca)
This commit is contained in:
salt.wei 2022-12-12 10:32:26 +08:00 committed by Lane.Wei
parent 9f4a54d280
commit 030d97bf78
3 changed files with 56 additions and 1 deletions
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44
src/libslic3r/Layer.cpp
View file

@ -350,6 +350,50 @@ void Layer::export_region_fill_surfaces_to_svg_debug(const char *name) const
this->export_region_fill_surfaces_to_svg(debug_out_path("Layer-fill_surfaces-%s-%d.svg", name, idx ++).c_str());
}
coordf_t Layer::get_sparse_infill_max_void_area()
{
double max_void_area = 0.;
for (auto layerm : m_regions) {
Flow flow = layerm->flow(frInfill);
float density = layerm->region().config().sparse_infill_density;
InfillPattern pattern = layerm->region().config().sparse_infill_pattern;
if (density == 0.)
return -1;
//BBS: rough estimation and need to be optimized
double spacing = flow.scaled_spacing() * (100 - density) / density;
switch (pattern) {
case ipConcentric:
case ipRectilinear:
case ipLine:
case ipGyroid:
case ipAlignedRectilinear:
case ipOctagramSpiral:
case ipHilbertCurve:
case ip3DHoneycomb:
case ipArchimedeanChords:
max_void_area = std::max(max_void_area, spacing * spacing);
break;
case ipGrid:
case ipHoneycomb:
case ipLightning:
max_void_area = std::max(max_void_area, 4.0 * spacing * spacing);
break;
case ipCubic:
case ipAdaptiveCubic:
case ipTriangles:
case ipStars:
case ipSupportCubic:
max_void_area = std::max(max_void_area, 4.5 * spacing * spacing);
break;
default:
max_void_area = std::max(max_void_area, spacing * spacing);
break;
}
};
return max_void_area;
}
BoundingBox get_extents(const LayerRegion &layer_region)
{
BoundingBox bbox;

2
src/libslic3r/Layer.hpp
View file

@ -184,6 +184,8 @@ public:
//BBS
void simplify_extrusion_path() { for (auto layerm : m_regions) layerm->simplify_extrusion_entity();}
//BBS: this function calculate the maximum void grid area of sparse infill of this layer. Just estimated value
coordf_t get_sparse_infill_max_void_area();
protected:
friend class PrintObject;

11
src/libslic3r/LayerRegion.cpp
View file

@ -152,11 +152,20 @@ void LayerRegion::process_external_surfaces(const Layer *lower_layer, const Poly
{
// Voids are sparse infills if infill rate is zero.
Polygons voids;
double max_grid_area = -1;
if (this->layer()->lower_layer != nullptr)
max_grid_area = this->layer()->lower_layer->get_sparse_infill_max_void_area();
for (const Surface &surface : this->fill_surfaces.surfaces) {
if (surface.is_top()) {
// Collect the top surfaces, inflate them and trim them by the bottom surfaces.
// This gives the priority to bottom surfaces.
surfaces_append(top, offset_ex(surface.expolygon, margin, EXTERNAL_SURFACES_OFFSET_PARAMETERS), surface);
if (max_grid_area < 0 || surface.expolygon.area() < max_grid_area)
surfaces_append(top, offset_ex(surface.expolygon, margin, EXTERNAL_SURFACES_OFFSET_PARAMETERS), surface);
else
//BBS: Don't need to expand too much in this situation. Expand 3mm to eliminate hole and 1mm for contour
surfaces_append(top, intersection_ex(offset(surface.expolygon.contour, margin / 3.0, EXTERNAL_SURFACES_OFFSET_PARAMETERS),
offset_ex(surface.expolygon, margin, EXTERNAL_SURFACES_OFFSET_PARAMETERS)), surface);
} else if (surface.surface_type == stBottom || (surface.surface_type == stBottomBridge && lower_layer == nullptr)) {
// Grown by 3mm.
surfaces_append(bottom, offset_ex(surface.expolygon, margin, EXTERNAL_SURFACES_OFFSET_PARAMETERS), surface);