diff options
Diffstat (limited to 'xs/src/libslic3r/PrintObject.cpp')
-rw-r--r-- | xs/src/libslic3r/PrintObject.cpp | 517 |
1 files changed, 499 insertions, 18 deletions
diff --git a/xs/src/libslic3r/PrintObject.cpp b/xs/src/libslic3r/PrintObject.cpp index 26f6c50a0..9bf74bee7 100644 --- a/xs/src/libslic3r/PrintObject.cpp +++ b/xs/src/libslic3r/PrintObject.cpp @@ -3,6 +3,7 @@ #include "ClipperUtils.hpp" #include "Geometry.hpp" #include "SupportMaterial.hpp" +#include "Surface.hpp" #include <utility> #include <boost/log/trivial.hpp> @@ -32,8 +33,8 @@ namespace Slic3r { -PrintObject::PrintObject(Print* print, ModelObject* model_object, const BoundingBoxf3 &modobj_bbox) -: typed_slices(false), +PrintObject::PrintObject(Print* print, ModelObject* model_object, const BoundingBoxf3 &modobj_bbox) : + typed_slices(false), _print(print), _model_object(model_object), layer_height_profile_valid(false) @@ -46,12 +47,10 @@ PrintObject::PrintObject(Print* print, ModelObject* model_object, const Bounding // don't assume it's already aligned and we don't alter the original position in model. // We store the XY translation so that we can place copies correctly in the output G-code // (copies are expressed in G-code coordinates and this translation is not publicly exposed). - this->_copies_shift = Point( - scale_(modobj_bbox.min.x), scale_(modobj_bbox.min.y)); - + this->_copies_shift = Point::new_scale(modobj_bbox.min.x, modobj_bbox.min.y); // Scale the object size and store it Pointf3 size = modobj_bbox.size(); - this->size = Point3(scale_(size.x), scale_(size.y), scale_(size.z)); + this->size = Point3::new_scale(size.x, size.y, size.z); } this->reload_model_instances(); @@ -283,6 +282,105 @@ bool PrintObject::has_support_material() const || this->config.support_material_enforce_layers > 0; } +void PrintObject::_prepare_infill() +{ + // This will assign a type (top/bottom/internal) to $layerm->slices. + // Then the classifcation of $layerm->slices is transfered onto + // the $layerm->fill_surfaces by clipping $layerm->fill_surfaces + // by the cummulative area of the previous $layerm->fill_surfaces. + this->detect_surfaces_type(); + + // Decide what surfaces are to be filled. + // Here the S_TYPE_TOP / S_TYPE_BOTTOMBRIDGE / S_TYPE_BOTTOM infill is turned to just S_TYPE_INTERNAL if zero top / bottom infill layers are configured. + // Also tiny S_TYPE_INTERNAL surfaces are turned to S_TYPE_INTERNAL_SOLID. + BOOST_LOG_TRIVIAL(info) << "Preparing fill surfaces..."; + for (auto *layer : this->layers) + for (auto *region : layer->regions) + region->prepare_fill_surfaces(); + + // this will detect bridges and reverse bridges + // and rearrange top/bottom/internal surfaces + // It produces enlarged overlapping bridging areas. + // + // 1) S_TYPE_BOTTOMBRIDGE / S_TYPE_BOTTOM infill is grown by 3mm and clipped by the total infill area. Bridges are detected. The areas may overlap. + // 2) S_TYPE_TOP is grown by 3mm and clipped by the grown bottom areas. The areas may overlap. + // 3) Clip the internal surfaces by the grown top/bottom surfaces. + // 4) Merge surfaces with the same style. This will mostly get rid of the overlaps. + //FIXME This does not likely merge surfaces, which are supported by a material with different colors, but same properties. + this->process_external_surfaces(); + + // Add solid fills to ensure the shell vertical thickness. + this->discover_vertical_shells(); + + // Debugging output. +#ifdef SLIC3R_DEBUG_SLICE_PROCESSING + for (size_t region_id = 0; region_id < this->print()->regions.size(); ++ region_id) + for (const Layer *layer : this->layers) { + LayerRegion *layerm = layer->regions[region_id]; + layerm->export_region_slices_to_svg_debug("6_discover_vertical_shells-final"); + layerm->export_region_fill_surfaces_to_svg_debug("6_discover_vertical_shells-final"); + } // for each layer + } // for each region +#endif /* SLIC3R_DEBUG_SLICE_PROCESSING */ + + // Detect, which fill surfaces are near external layers. + // They will be split in internal and internal-solid surfaces. + // The purpose is to add a configurable number of solid layers to support the TOP surfaces + // and to add a configurable number of solid layers above the BOTTOM / BOTTOMBRIDGE surfaces + // to close these surfaces reliably. + //FIXME Vojtech: Is this a good place to add supporting infills below sloping perimeters? + this->discover_horizontal_shells(); + +#ifdef SLIC3R_DEBUG_SLICE_PROCESSING + for (size_t region_id = 0; region_id < this->print()->regions.size(); ++ region_id) + for (const Layer *layer : this->layers) { + LayerRegion *layerm = layer->regions[region_id]; + layerm->export_region_slices_to_svg_debug("7_discover_horizontal_shells-final"); + layerm->export_region_fill_surfaces_to_svg_debug("7_discover_horizontal_shells-final"); + } // for each layer + } // for each region +#endif /* SLIC3R_DEBUG_SLICE_PROCESSING */ + + // Only active if config->infill_only_where_needed. This step trims the sparse infill, + // so it acts as an internal support. It maintains all other infill types intact. + // Here the internal surfaces and perimeters have to be supported by the sparse infill. + //FIXME The surfaces are supported by a sparse infill, but the sparse infill is only as large as the area to support. + // Likely the sparse infill will not be anchored correctly, so it will not work as intended. + // Also one wishes the perimeters to be supported by a full infill. + this->clip_fill_surfaces(); + +#ifdef SLIC3R_DEBUG_SLICE_PROCESSING + for (size_t region_id = 0; region_id < this->print()->regions.size(); ++ region_id) + for (const Layer *layer : this->layers) { + LayerRegion *layerm = layer->regions[region_id]; + layerm->export_region_slices_to_svg_debug("8_clip_surfaces-final"); + layerm->export_region_fill_surfaces_to_svg_debug("8_clip_surfaces-final"); + } // for each layer + } // for each region +#endif /* SLIC3R_DEBUG_SLICE_PROCESSING */ + + // the following step needs to be done before combination because it may need + // to remove only half of the combined infill + this->bridge_over_infill(); + + // combine fill surfaces to honor the "infill every N layers" option + this->combine_infill(); + +#ifdef SLIC3R_DEBUG_SLICE_PROCESSING + for (size_t region_id = 0; region_id < this->print()->regions.size(); ++ region_id) + for (const Layer *layer : this->layers) { + LayerRegion *layerm = layer->regions[region_id]; + layerm->export_region_slices_to_svg_debug("9_prepare_infill-final"); + layerm->export_region_fill_surfaces_to_svg_debug("9_prepare_infill-final"); + } // for each layer + } // for each region + for (const Layer *layer : this->layers) { + layer->export_region_slices_to_svg_debug("9_prepare_infill-final"); + layer->export_region_fill_surfaces_to_svg_debug("9_prepare_infill-final"); + } // for each layer +#endif /* SLIC3R_DEBUG_SLICE_PROCESSING */ +} + // This function analyzes slices of a region (SurfaceCollection slices). // Each region slice (instance of Surface) is analyzed, whether it is supported or whether it is the top surface. // Initially all slices are of type stInternal. @@ -334,8 +432,8 @@ void PrintObject::detect_surfaces_type() LayerRegion *layerm = layer->get_region(idx_region); // comparison happens against the *full* slices (considering all regions) // unless internal shells are requested - Layer *upper_layer = idx_layer + 1 < this->layer_count() ? this->get_layer(idx_layer + 1) : nullptr; - Layer *lower_layer = idx_layer > 0 ? this->get_layer(idx_layer - 1) : nullptr; + Layer *upper_layer = (idx_layer + 1 < this->layer_count()) ? this->layers[idx_layer + 1] : nullptr; + Layer *lower_layer = (idx_layer > 0) ? this->layers[idx_layer - 1] : nullptr; // collapse very narrow parts (using the safety offset in the diff is not enough) float offset = layerm->flow(frExternalPerimeter).scaled_width() / 10.f; @@ -473,7 +571,10 @@ void PrintObject::detect_surfaces_type() } // for each layer of a region }); BOOST_LOG_TRIVIAL(debug) << "Detecting solid surfaces for region " << idx_region << " - clipping in parallel - end"; - } // for each $self->print->region_count + } // for each this->print->region_count + + // Mark the object to have the region slices classified (typed, which also means they are split based on whether they are supported, bridging, top layers etc.) + this->typed_slices = true; } void PrintObject::process_external_surfaces() @@ -669,7 +770,6 @@ void PrintObject::discover_vertical_shells() ExPolygons shell_ex; #endif /* SLIC3R_DEBUG_SLICE_PROCESSING */ float min_perimeter_infill_spacing = float(infill_line_spacing) * 1.05f; - if (1) { PROFILE_BLOCK(discover_vertical_shells_region_layer_collect); #if 0 @@ -698,8 +798,7 @@ void PrintObject::discover_vertical_shells() bool hole_first = true; for (int n = (int)idx_layer - n_extra_bottom_layers; n <= (int)idx_layer + n_extra_top_layers; ++ n) if (n >= 0 && n < (int)this->layers.size()) { - Layer &neighbor_layer = *this->layers[n]; - LayerRegion &neighbor_region = *neighbor_layer.get_region(int(idx_region)); + Layer &neighbor_layer = *this->layers[n]; const DiscoverVerticalShellsCacheEntry &cache = cache_top_botom_regions[n]; if (hole_first) { hole_first = false; @@ -880,8 +979,7 @@ void PrintObject::discover_vertical_shells() /* This method applies bridge flow to the first internal solid layer above sparse infill */ -void -PrintObject::bridge_over_infill() +void PrintObject::bridge_over_infill() { BOOST_LOG_TRIVIAL(info) << "Bridge over infill..."; @@ -906,7 +1004,7 @@ PrintObject::bridge_over_infill() if (layer_it == this->layers.begin()) continue; Layer* layer = *layer_it; - LayerRegion* layerm = layer->get_region(region_id); + LayerRegion* layerm = layer->regions[region_id]; // extract the stInternalSolid surfaces that might be transformed into bridges Polygons internal_solid; @@ -921,7 +1019,7 @@ PrintObject::bridge_over_infill() // iterate through lower layers spanned by bridge_flow double bottom_z = layer->print_z - bridge_flow.height; - for (int i = (layer_it - this->layers.begin()) - 1; i >= 0; --i) { + for (int i = int(layer_it - this->layers.begin()) - 1; i >= 0; --i) { const Layer* lower_layer = this->layers[i]; // stop iterating if layer is lower than bottom_z @@ -941,7 +1039,7 @@ PrintObject::bridge_over_infill() // therefore it may create 1) gaps, and 2) sharp corners, which are outside the original contour. // The gaps will be filled by a separate region, which makes the infill less stable and it takes longer. { - double min_width = bridge_flow.scaled_width() * 3; + float min_width = float(bridge_flow.scaled_width()) * 3.f; to_bridge_pp = offset2(to_bridge_pp, -min_width, +min_width); } @@ -1069,6 +1167,8 @@ void PrintObject::_slice() { BOOST_LOG_TRIVIAL(info) << "Slicing objects..."; + this->typed_slices = false; + #if 0 // Disable parallelization for debugging purposes. static tbb::task_scheduler_init *tbb_init = nullptr; @@ -1221,7 +1321,7 @@ std::vector<ExPolygons> PrintObject::_slice_region(size_t region_id, const std:: // consider the first one this->model_object()->instances.front()->transform_mesh(&mesh, true); // align mesh to Z = 0 (it should be already aligned actually) and apply XY shift - mesh.translate(- unscale(this->_copies_shift.x), - unscale(this->_copies_shift.y), -this->model_object()->bounding_box().min.z); + mesh.translate(- float(unscale(this->_copies_shift.x)), - float(unscale(this->_copies_shift.y)), -float(this->model_object()->bounding_box().min.z)); // perform actual slicing TriangleMeshSlicer mslicer(&mesh); mslicer.slice(z, &layers); @@ -1462,6 +1562,387 @@ void PrintObject::_infill() this->state.set_done(posInfill); } +// Only active if config->infill_only_where_needed. This step trims the sparse infill, +// so it acts as an internal support. It maintains all other infill types intact. +// Here the internal surfaces and perimeters have to be supported by the sparse infill. +//FIXME The surfaces are supported by a sparse infill, but the sparse infill is only as large as the area to support. +// Likely the sparse infill will not be anchored correctly, so it will not work as intended. +// Also one wishes the perimeters to be supported by a full infill. +// Idempotence of this method is guaranteed by the fact that we don't remove things from +// fill_surfaces but we only turn them into VOID surfaces, thus preserving the boundaries. +void PrintObject::clip_fill_surfaces() +{ + if (! this->config.infill_only_where_needed.value || + ! std::any_of(this->print()->regions.begin(), this->print()->regions.end(), + [](const PrintRegion *region) { return region->config.fill_density > 0; })) + return; + + // We only want infill under ceilings; this is almost like an + // internal support material. + // Proceed top-down, skipping the bottom layer. + Polygons upper_internal; + for (int layer_id = int(this->layers.size()) - 1; layer_id > 0; -- layer_id) { + Layer *layer = this->layers[layer_id]; + Layer *lower_layer = this->layers[layer_id - 1]; + // Detect things that we need to support. + // Cummulative slices. + Polygons slices; + for (const ExPolygon &expoly : layer->slices.expolygons) + polygons_append(slices, to_polygons(expoly)); + // Cummulative fill surfaces. + Polygons fill_surfaces; + // Solid surfaces to be supported. + Polygons overhangs; + for (const LayerRegion *layerm : layer->regions) + for (const Surface &surface : layerm->fill_surfaces.surfaces) { + Polygons polygons = to_polygons(surface.expolygon); + if (surface.is_solid()) + polygons_append(overhangs, polygons); + polygons_append(fill_surfaces, std::move(polygons)); + } + Polygons lower_layer_fill_surfaces; + Polygons lower_layer_internal_surfaces; + for (const LayerRegion *layerm : lower_layer->regions) + for (const Surface &surface : layerm->fill_surfaces.surfaces) { + Polygons polygons = to_polygons(surface.expolygon); + if (surface.surface_type == stInternal || surface.surface_type == stInternalVoid) + polygons_append(lower_layer_internal_surfaces, polygons); + polygons_append(lower_layer_fill_surfaces, std::move(polygons)); + } + // We also need to support perimeters when there's at least one full unsupported loop + { + // Get perimeters area as the difference between slices and fill_surfaces + // Only consider the area that is not supported by lower perimeters + Polygons perimeters = intersection(diff(slices, fill_surfaces), lower_layer_fill_surfaces); + // Only consider perimeter areas that are at least one extrusion width thick. + //FIXME Offset2 eats out from both sides, while the perimeters are create outside in. + //Should the pw not be half of the current value? + float pw = FLT_MAX; + for (const LayerRegion *layerm : layer->regions) + pw = std::min<float>(pw, layerm->flow(frPerimeter).scaled_width()); + // Append such thick perimeters to the areas that need support + polygons_append(overhangs, offset2(perimeters, -pw, +pw)); + } + // Find new internal infill. + polygons_append(overhangs, std::move(upper_internal)); + upper_internal = intersection(overhangs, lower_layer_internal_surfaces); + // Apply new internal infill to regions. + for (LayerRegion *layerm : lower_layer->regions) { + if (layerm->region()->config.fill_density.value == 0) + continue; + SurfaceType internal_surface_types[] = { stInternal, stInternalVoid }; + Polygons internal; + for (Surface &surface : layerm->fill_surfaces.surfaces) + if (surface.surface_type == stInternal || surface.surface_type == stInternalVoid) + polygons_append(internal, std::move(surface.expolygon)); + layerm->fill_surfaces.remove_types(internal_surface_types, 2); + layerm->fill_surfaces.append(intersection_ex(internal, upper_internal, true), stInternal); + layerm->fill_surfaces.append(diff_ex (internal, upper_internal, true), stInternalVoid); + // If there are voids it means that our internal infill is not adjacent to + // perimeters. In this case it would be nice to add a loop around infill to + // make it more robust and nicer. TODO. +#ifdef SLIC3R_DEBUG_SLICE_PROCESSING + layerm->export_region_fill_surfaces_to_svg_debug("6_clip_fill_surfaces"); +#endif + } + } +} + +void PrintObject::discover_horizontal_shells() +{ + BOOST_LOG_TRIVIAL(trace) << "discover_horizontal_shells()"; + + for (size_t region_id = 0; region_id < this->print()->regions.size(); ++ region_id) { + for (int i = 0; i < int(this->layers.size()); ++ i) { + LayerRegion *layerm = this->layers[i]->regions[region_id]; + PrintRegionConfig ®ion_config = layerm->region()->config; + if (region_config.solid_infill_every_layers.value > 0 && region_config.fill_density.value > 0 && + (i % region_config.solid_infill_every_layers) == 0) { + // Insert a solid internal layer. Mark stInternal surfaces as stInternalSolid or stInternalBridge. + SurfaceType type = (region_config.fill_density == 100) ? stInternalSolid : stInternalBridge; + for (Surface &surface : layerm->fill_surfaces.surfaces) + if (surface.surface_type == stInternal) + surface.surface_type = type; + } + + // If ensure_vertical_shell_thickness, then the rest has already been performed by discover_vertical_shells(). + if (region_config.ensure_vertical_shell_thickness.value) + continue; + + for (int idx_surface_type = 0; idx_surface_type < 3; ++ idx_surface_type) { + SurfaceType type = (idx_surface_type == 0) ? stTop : (idx_surface_type == 1) ? stBottom : stBottomBridge; + // Find slices of current type for current layer. + // Use slices instead of fill_surfaces, because they also include the perimeter area, + // which needs to be propagated in shells; we need to grow slices like we did for + // fill_surfaces though. Using both ungrown slices and grown fill_surfaces will + // not work in some situations, as there won't be any grown region in the perimeter + // area (this was seen in a model where the top layer had one extra perimeter, thus + // its fill_surfaces were thinner than the lower layer's infill), however it's the best + // solution so far. Growing the external slices by EXTERNAL_INFILL_MARGIN will put + // too much solid infill inside nearly-vertical slopes. + + // Surfaces including the area of perimeters. Everything, that is visible from the top / bottom + // (not covered by a layer above / below). + // This does not contain the areas covered by perimeters! + Polygons solid; + for (const Surface &surface : layerm->slices.surfaces) + if (surface.surface_type == type) + polygons_append(solid, to_polygons(surface.expolygon)); + // Infill areas (slices without the perimeters). + for (const Surface &surface : layerm->fill_surfaces.surfaces) + if (surface.surface_type == type) + polygons_append(solid, to_polygons(surface.expolygon)); + if (solid.empty()) + continue; +// Slic3r::debugf "Layer %d has %s surfaces\n", $i, ($type == S_TYPE_TOP) ? 'top' : 'bottom'; + + size_t solid_layers = (type == stTop) ? region_config.top_solid_layers.value : region_config.bottom_solid_layers.value; + for (int n = (type == stTop) ? i-1 : i+1; std::abs(n - i) < solid_layers; (type == stTop) ? -- n : ++ n) { + if (n < 0 || n >= int(this->layers.size())) + continue; +// Slic3r::debugf " looking for neighbors on layer %d...\n", $n; + // Reference to the lower layer of a TOP surface, or an upper layer of a BOTTOM surface. + LayerRegion *neighbor_layerm = this->layers[n]->regions[region_id]; + + // find intersection between neighbor and current layer's surfaces + // intersections have contours and holes + // we update $solid so that we limit the next neighbor layer to the areas that were + // found on this one - in other words, solid shells on one layer (for a given external surface) + // are always a subset of the shells found on the previous shell layer + // this approach allows for DWIM in hollow sloping vases, where we want bottom + // shells to be generated in the base but not in the walls (where there are many + // narrow bottom surfaces): reassigning $solid will consider the 'shadow' of the + // upper perimeter as an obstacle and shell will not be propagated to more upper layers + //FIXME How does it work for S_TYPE_INTERNALBRIDGE? This is set for sparse infill. Likely this does not work. + Polygons new_internal_solid; + { + Polygons internal; + for (const Surface &surface : neighbor_layerm->fill_surfaces.surfaces) + if (surface.surface_type == stInternal || surface.surface_type == stInternalSolid) + polygons_append(internal, to_polygons(surface.expolygon)); + new_internal_solid = intersection(solid, internal, true); + } + if (new_internal_solid.empty()) { + // No internal solid needed on this layer. In order to decide whether to continue + // searching on the next neighbor (thus enforcing the configured number of solid + // layers, use different strategies according to configured infill density: + if (region_config.fill_density.value == 0) { + // If user expects the object to be void (for example a hollow sloping vase), + // don't continue the search. In this case, we only generate the external solid + // shell if the object would otherwise show a hole (gap between perimeters of + // the two layers), and internal solid shells are a subset of the shells found + // on each previous layer. + goto EXTERNAL; + } else { + // If we have internal infill, we can generate internal solid shells freely. + continue; + } + } + + if (region_config.fill_density.value == 0) { + // if we're printing a hollow object we discard any solid shell thinner + // than a perimeter width, since it's probably just crossing a sloping wall + // and it's not wanted in a hollow print even if it would make sense when + // obeying the solid shell count option strictly (DWIM!) + float margin = float(neighbor_layerm->flow(frExternalPerimeter).scaled_width()); + Polygons too_narrow = diff( + new_internal_solid, + offset2(new_internal_solid, -margin, +margin, jtMiter, 5), + true); + // Trim the regularized region by the original region. + if (! too_narrow.empty()) + new_internal_solid = solid = diff(new_internal_solid, too_narrow); + } + + // make sure the new internal solid is wide enough, as it might get collapsed + // when spacing is added in Fill.pm + { + //FIXME Vojtech: Disable this and you will be sorry. + // https://github.com/prusa3d/Slic3r/issues/26 bottom + float margin = 3.f * layerm->flow(frSolidInfill).scaled_width(); // require at least this size + // we use a higher miterLimit here to handle areas with acute angles + // in those cases, the default miterLimit would cut the corner and we'd + // get a triangle in $too_narrow; if we grow it below then the shell + // would have a different shape from the external surface and we'd still + // have the same angle, so the next shell would be grown even more and so on. + Polygons too_narrow = diff( + new_internal_solid, + offset2(new_internal_solid, -margin, +margin, ClipperLib::jtMiter, 5), + true); + if (! too_narrow.empty()) { + // grow the collapsing parts and add the extra area to the neighbor layer + // as well as to our original surfaces so that we support this + // additional area in the next shell too + // make sure our grown surfaces don't exceed the fill area + Polygons internal; + for (const Surface &surface : neighbor_layerm->fill_surfaces.surfaces) + if (surface.is_internal() && !surface.is_bridge()) + polygons_append(internal, to_polygons(surface.expolygon)); + polygons_append(new_internal_solid, + intersection( + offset(too_narrow, +margin), + // Discard bridges as they are grown for anchoring and we can't + // remove such anchors. (This may happen when a bridge is being + // anchored onto a wall where little space remains after the bridge + // is grown, and that little space is an internal solid shell so + // it triggers this too_narrow logic.) + internal)); + solid = new_internal_solid; + } + } + + // internal-solid are the union of the existing internal-solid surfaces + // and new ones + SurfaceCollection backup = std::move(neighbor_layerm->fill_surfaces); + polygons_append(new_internal_solid, to_polygons(backup.filter_by_type(stInternalSolid))); + ExPolygons internal_solid = union_ex(new_internal_solid, false); + // assign new internal-solid surfaces to layer + neighbor_layerm->fill_surfaces.set(internal_solid, stInternalSolid); + // subtract intersections from layer surfaces to get resulting internal surfaces + Polygons polygons_internal = to_polygons(std::move(internal_solid)); + ExPolygons internal = diff_ex( + to_polygons(backup.filter_by_type(stInternal)), + polygons_internal, + true); + // assign resulting internal surfaces to layer + neighbor_layerm->fill_surfaces.append(internal, stInternal); + polygons_append(polygons_internal, to_polygons(std::move(internal))); + // assign top and bottom surfaces to layer + SurfaceType surface_types_solid[] = { stTop, stBottom, stBottomBridge }; + backup.keep_types(surface_types_solid, 3); + std::vector<SurfacesPtr> top_bottom_groups; + backup.group(&top_bottom_groups); + for (SurfacesPtr &group : top_bottom_groups) + neighbor_layerm->fill_surfaces.append( + diff_ex(to_polygons(group), polygons_internal), + group.front()->surface_type); + } + EXTERNAL:; + } // foreach type (stTop, stBottom, stBottomBridge) + } // for each layer + } // for each region + +#ifdef SLIC3R_DEBUG_SLICE_PROCESSING + for (size_t region_id = 0; region_id < this->print()->regions.size(); ++ region_id) + for (const Layer *layer : this->layers) { + const LayerRegion *layerm = layer->regions[region_id]; + layerm->export_region_slices_to_svg_debug("5_discover_horizontal_shells"); + layerm->export_region_fill_surfaces_to_svg_debug("5_discover_horizontal_shells"); + } // for each layer + } // for each region +#endif /* SLIC3R_DEBUG_SLICE_PROCESSING */ +} + +// combine fill surfaces across layers to honor the "infill every N layers" option +// Idempotence of this method is guaranteed by the fact that we don't remove things from +// fill_surfaces but we only turn them into VOID surfaces, thus preserving the boundaries. +void PrintObject::combine_infill() +{ + // Work on each region separately. + for (size_t region_id = 0; region_id < this->print()->regions.size(); ++ region_id) { + const PrintRegion *region = this->print()->regions[region_id]; + const int every = region->config.infill_every_layers.value; + if (every < 2 || region->config.fill_density == 0.) + continue; + // Limit the number of combined layers to the maximum height allowed by this regions' nozzle. + //FIXME limit the layer height to max_layer_height + double nozzle_diameter = std::min( + this->print()->config.nozzle_diameter.get_at(region->config.infill_extruder.value - 1), + this->print()->config.nozzle_diameter.get_at(region->config.solid_infill_extruder.value - 1)); + // define the combinations + std::vector<size_t> combine(this->layers.size(), 0); + { + double current_height = 0.; + size_t num_layers = 0; + for (size_t layer_idx = 0; layer_idx < this->layers.size(); ++ layer_idx) { + const Layer *layer = this->layers[layer_idx]; + if (layer->id() == 0) + // Skip first print layer (which may not be first layer in array because of raft). + continue; + // Check whether the combination of this layer with the lower layers' buffer + // would exceed max layer height or max combined layer count. + if (current_height + layer->height >= nozzle_diameter + EPSILON || num_layers >= every) { + // Append combination to lower layer. + combine[layer_idx - 1] = num_layers; + current_height = 0.; + num_layers = 0; + } + current_height += layer->height; + ++ num_layers; + } + + // Append lower layers (if any) to uppermost layer. + combine[this->layers.size() - 1] = num_layers; + } + + // loop through layers to which we have assigned layers to combine + for (size_t layer_idx = 0; layer_idx < this->layers.size(); ++ layer_idx) { + size_t num_layers = combine[layer_idx]; + if (num_layers <= 1) + continue; + // Get all the LayerRegion objects to be combined. + std::vector<LayerRegion*> layerms; + layerms.reserve(num_layers); + for (size_t i = layer_idx + 1 - num_layers; i <= layer_idx; ++ i) + layerms.emplace_back(this->layers[i]->regions[region_id]); + // We need to perform a multi-layer intersection, so let's split it in pairs. + // Initialize the intersection with the candidates of the lowest layer. + ExPolygons intersection = to_expolygons(layerms.front()->fill_surfaces.filter_by_type(stInternal)); + // Start looping from the second layer and intersect the current intersection with it. + for (size_t i = 1; i < layerms.size(); ++ i) + intersection = intersection_ex( + to_polygons(intersection), + to_polygons(layerms[i]->fill_surfaces.filter_by_type(stInternal)), + false); + double area_threshold = layerms.front()->infill_area_threshold(); + if (! intersection.empty() && area_threshold > 0.) + intersection.erase(std::remove_if(intersection.begin(), intersection.end(), + [area_threshold](const ExPolygon &expoly) { return expoly.area() <= area_threshold; }), + intersection.end()); + if (intersection.empty()) + continue; +// Slic3r::debugf " combining %d %s regions from layers %d-%d\n", +// scalar(@$intersection), +// ($type == S_TYPE_INTERNAL ? 'internal' : 'internal-solid'), +// $layer_idx-($every-1), $layer_idx; + // intersection now contains the regions that can be combined across the full amount of layers, + // so let's remove those areas from all layers. + Polygons intersection_with_clearance; + intersection_with_clearance.reserve(intersection.size()); + float clearance_offset = + 0.5f * layerms.back()->flow(frPerimeter).scaled_width() + + // Because fill areas for rectilinear and honeycomb are grown + // later to overlap perimeters, we need to counteract that too. + ((region->config.fill_pattern == ipRectilinear || + region->config.fill_pattern == ipGrid || + region->config.fill_pattern == ipLine || + region->config.fill_pattern == ipHoneycomb) ? 1.5f : 0.5f) * + layerms.back()->flow(frSolidInfill).scaled_width(); + for (ExPolygon &expoly : intersection) + polygons_append(intersection_with_clearance, offset(expoly, clearance_offset)); + for (LayerRegion *layerm : layerms) { + Polygons internal = to_polygons(layerm->fill_surfaces.filter_by_type(stInternal)); + layerm->fill_surfaces.remove_type(stInternal); + layerm->fill_surfaces.append(diff_ex(internal, intersection_with_clearance, false), stInternal); + if (layerm == layerms.back()) { + // Apply surfaces back with adjusted depth to the uppermost layer. + Surface templ(stInternal, ExPolygon()); + templ.thickness = 0.; + for (LayerRegion *layerm2 : layerms) + templ.thickness += layerm2->layer()->height; + templ.thickness_layers = (unsigned short)layerms.size(); + layerm->fill_surfaces.append(intersection, templ); + } else { + // Save void surfaces. + layerm->fill_surfaces.append( + intersection_ex(internal, intersection_with_clearance, false), + stInternalVoid); + } + } + } + } +} + void PrintObject::_generate_support_material() { PrintObjectSupportMaterial support_material(this, PrintObject::slicing_parameters()); |