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Limit bridge over sparse infill to areas that can absorb such extrudate. #2899

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This commit is contained in:
Alessandro Ranellucci 2015-06-13 19:48:46 +02:00
parent 7a34078f5f
commit 38a9e32a28
1 changed files with 51 additions and 11 deletions
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62
xs/src/libslic3r/PrintObject.cpp
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@ -349,30 +349,70 @@ PrintObject::bridge_over_infill()
double fill_density = (*region)->config.fill_density.value;
if (fill_density == 100) continue;
// get bridge flow
Flow bridge_flow = (*region)->flow(
frSolidInfill,
-1, // layer height, not relevant for bridge flow
true, // bridge
false, // first layer
-1, // custom width, not relevant for bridge flow
*this
);
FOREACH_LAYER(this, layer_it) {
if (layer_it == this->layers.begin()) continue;
Layer* layer = *layer_it;
Layer* lower_layer = *(layer_it - 1);
LayerRegion* layerm = layer->get_region(region_id);
// compute the areas needing bridge math
Polygons internal_solid, lower_internal;
// extract the stInternalSolid surfaces that might be transformed into bridges
Polygons internal_solid;
layerm->fill_surfaces.filter_by_type(stInternalSolid, &internal_solid);
FOREACH_LAYERREGION(lower_layer, lower_layerm_it)
(*lower_layerm_it)->fill_surfaces.filter_by_type(stInternal, &lower_internal);
// check whether the lower area is deep enough for absorbing the extra flow
// (for obvious physical reasons but also for preventing the bridge extrudates
// from overflowing in 3D preview)
ExPolygons to_bridge;
intersection(internal_solid, lower_internal, &to_bridge);
if (to_bridge.empty()) continue;
ExPolygons not_to_bridge;
diff(internal_solid, to_bridge, &not_to_bridge, true);
{
Polygons to_bridge_pp = internal_solid;
// 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) {
Layer* lower_layer = this->layers[i];
// stop iterating if layer is lower than bottom_z
if (lower_layer->print_z < bottom_z) break;
// iterate through regions and collect internal surfaces
Polygons lower_internal;
FOREACH_LAYERREGION(lower_layer, lower_layerm_it)
(*lower_layerm_it)->fill_surfaces.filter_by_type(stInternal, &lower_internal);
// intersect such lower internal surfaces with the candidate solid surfaces
intersection(to_bridge_pp, lower_internal, &to_bridge_pp);
}
// there's no point in bridging too thin/short regions
{
double min_width = bridge_flow.scaled_width() * 3;
offset2(to_bridge_pp, &to_bridge_pp, -min_width, +min_width);
}
if (to_bridge_pp.empty()) continue;
// convert into ExPolygons
union_(to_bridge_pp, &to_bridge);
}
#ifdef SLIC3R_DEBUG
printf("Bridging %zu internal areas at layer %d\n", to_bridge.size(), layer->id());
printf("Bridging %zu internal areas at layer %zu\n", to_bridge.size(), layer->id());
#endif
// compute the remaning internal solid surfaces as difference
ExPolygons not_to_bridge;
diff(internal_solid, to_bridge, &not_to_bridge, true);
// build the new collection of fill_surfaces
{
Surfaces new_surfaces;