void SkirtBrim::getFirstLayerOutline(SliceDataStorage& storage, const unsigned int primary_line_count, const int primary_extruder_skirt_brim_line_width, const bool is_skirt, const bool outside_only, Polygons& first_layer_outline)
{
bool external_only = is_skirt; // whether to include holes or not
const int layer_nr = 0;
if (is_skirt)
{
const bool include_helper_parts = true;
first_layer_outline = storage.getLayerOutlines(layer_nr, include_helper_parts, external_only);
first_layer_outline = first_layer_outline.approxConvexHull();
}
else
{ // add brim underneath support by removing support where there's brim around the model
const bool include_helper_parts = false; // include manually below
first_layer_outline = storage.getLayerOutlines(layer_nr, include_helper_parts, external_only);
first_layer_outline.add(storage.primeTower.ground_poly); // don't remove parts of the prime tower, but make a brim for it
if (outside_only)
{
first_layer_outline = first_layer_outline.removeEmptyHoles();
}
if (storage.support.generated && primary_line_count > 0)
{ // remove model-brim from support
// avoid gap in the middle
// V
// +---+ +----+
// |+-+| |+--+|
// || || ||[]|| > expand to fit an extra brim line
// |+-+| |+--+|
// +---+ +----+
const Polygons& model_brim_covered_area = first_layer_outline.offset(primary_extruder_skirt_brim_line_width * (primary_line_count + primary_line_count % 2)); // always leave a gap of an even number of brim lines, so that it fits if it's generating brim from both sides
SupportLayer& support_layer = storage.support.supportLayers[0];
support_layer.supportAreas = support_layer.supportAreas.difference(model_brim_covered_area);
first_layer_outline.add(support_layer.supportAreas);
first_layer_outline.add(support_layer.skin);
}
}
constexpr int join_distance = 20;
first_layer_outline = first_layer_outline.offset(join_distance).offset(-join_distance); // merge adjacent models into single polygon
constexpr int smallest_line_length = 200;
constexpr int largest_error_of_removed_point = 50;
first_layer_outline.simplify(smallest_line_length, largest_error_of_removed_point); // simplify for faster processing of the brim lines
}
void SkirtBrim::getFirstLayerOutline(SliceDataStorage& storage, const size_t primary_line_count, const bool is_skirt, Polygons& first_layer_outline)
{
const ExtruderTrain& train = Application::getInstance().current_slice->scene.current_mesh_group->settings.get<ExtruderTrain&>("adhesion_extruder_nr");
const ExtruderTrain& support_infill_extruder = Application::getInstance().current_slice->scene.current_mesh_group->settings.get<ExtruderTrain&>("support_infill_extruder_nr");
const bool external_only = is_skirt || train.settings.get<bool>("brim_outside_only"); //Whether to include holes or not. Skirt doesn't have any holes.
const LayerIndex layer_nr = 0;
if (is_skirt)
{
constexpr bool include_support = true;
constexpr bool include_prime_tower = true;
first_layer_outline = storage.getLayerOutlines(layer_nr, include_support, include_prime_tower, external_only);
first_layer_outline = first_layer_outline.approxConvexHull();
}
else
{ // add brim underneath support by removing support where there's brim around the model
constexpr bool include_support = false; //Include manually below.
constexpr bool include_prime_tower = false; //Include manually below.
constexpr bool external_outlines_only = false; //Remove manually below.
first_layer_outline = storage.getLayerOutlines(layer_nr, include_support, include_prime_tower, external_outlines_only);
first_layer_outline = first_layer_outline.unionPolygons(); //To guard against overlapping outlines, which would produce holes according to the even-odd rule.
Polygons first_layer_empty_holes;
if (external_only)
{
first_layer_empty_holes = first_layer_outline.getEmptyHoles();
first_layer_outline = first_layer_outline.removeEmptyHoles();
}
if (storage.support.generated && primary_line_count > 0 && !storage.support.supportLayers.empty())
{ // remove model-brim from support
SupportLayer& support_layer = storage.support.supportLayers[0];
if (support_infill_extruder.settings.get<bool>("brim_replaces_support"))
{
// avoid gap in the middle
// V
// +---+ +----+
// |+-+| |+--+|
// || || ||[]|| > expand to fit an extra brim line
// |+-+| |+--+|
// +---+ +----+
const coord_t primary_extruder_skirt_brim_line_width = train.settings.get<coord_t>("skirt_brim_line_width") * train.settings.get<Ratio>("initial_layer_line_width_factor");
Polygons model_brim_covered_area = first_layer_outline.offset(primary_extruder_skirt_brim_line_width * (primary_line_count + primary_line_count % 2), ClipperLib::jtRound); // always leave a gap of an even number of brim lines, so that it fits if it's generating brim from both sides
if (external_only)
{ // don't remove support within empty holes where no brim is generated.
model_brim_covered_area.add(first_layer_empty_holes);
}
AABB model_brim_covered_area_boundary_box(model_brim_covered_area);
support_layer.excludeAreasFromSupportInfillAreas(model_brim_covered_area, model_brim_covered_area_boundary_box);
}
for (const SupportInfillPart& support_infill_part : support_layer.support_infill_parts)
{
first_layer_outline.add(support_infill_part.outline);
}
first_layer_outline.add(support_layer.support_bottom);
first_layer_outline.add(support_layer.support_roof);
}
if (storage.primeTower.enabled)
{
first_layer_outline.add(storage.primeTower.outer_poly_first_layer); // don't remove parts of the prime tower, but make a brim for it
}
}
constexpr coord_t join_distance = 20;
first_layer_outline = first_layer_outline.offset(join_distance).offset(-join_distance); // merge adjacent models into single polygon
constexpr coord_t smallest_line_length = 200;
constexpr coord_t largest_error_of_removed_point = 50;
first_layer_outline.simplify(smallest_line_length, largest_error_of_removed_point); // simplify for faster processing of the brim lines
if (first_layer_outline.size() == 0)
{
logError("Couldn't generate skirt / brim! No polygons on first layer.\n");
}
}
