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make_skirt ported to C++

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bubnikv 2017-02-15 11:05:52 +01:00
parent 90028e47e9
commit 3d11d1aebf
4 changed files with 136 additions and 106 deletions
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131
xs/src/libslic3r/Print.cpp
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@ -1,6 +1,7 @@
#include "Print.hpp"
#include "BoundingBox.hpp"
#include "ClipperUtils.hpp"
#include "Extruder.hpp"
#include "Flow.hpp"
#include "Geometry.hpp"
#include "SupportMaterial.hpp"
@ -839,9 +840,137 @@ Print::auto_assign_extruders(ModelObject* model_object) const
//FIXME Vojtech: This assigns an extruder ID even to a modifier volume, if it has a material assigned.
size_t extruder_id = (v - model_object->volumes.begin()) + 1;
if (!(*v)->config.has("extruder"))
(*v)->config.opt<ConfigOptionInt>("extruder", true)->value = extruder_id;
(*v)->config.opt<ConfigOptionInt>("extruder", true)->value = int(extruder_id);
}
}
}
void Print::_make_skirt()
{
// First off we need to decide how tall the skirt must be.
// The skirt_height option from config is expressed in layers, but our
// object might have different layer heights, so we need to find the print_z
// of the highest layer involved.
// Note that unless has_infinite_skirt() == true
// the actual skirt might not reach this $skirt_height_z value since the print
// order of objects on each layer is not guaranteed and will not generally
// include the thickest object first. It is just guaranteed that a skirt is
// prepended to the first 'n' layers (with 'n' = skirt_height).
// $skirt_height_z in this case is the highest possible skirt height for safety.
coordf_t skirt_height_z = 0.;
for (const PrintObject *object : this->objects) {
size_t skirt_layers = this->has_infinite_skirt() ?
object->layer_count() :
std::min(size_t(this->config.skirt_height.value), object->layer_count());
skirt_height_z = std::max(skirt_height_z, object->layers[skirt_layers-1]->print_z);
}
// Collect points from all layers contained in skirt height.
Points points;
for (const PrintObject *object : this->objects) {
Points object_points;
// Get object layers up to skirt_height_z.
for (const Layer *layer : object->layers) {
if (layer->print_z > skirt_height_z)
break;
for (const ExPolygon &expoly : layer->slices.expolygons)
// Collect the outer contour points only, ignore holes for the calculation of the convex hull.
append(object_points, expoly.contour.points);
}
// Get support layers up to skirt_height_z.
for (const SupportLayer *layer : object->support_layers) {
if (layer->print_z > skirt_height_z)
break;
for (const ExtrusionEntity *extrusion_entity : layer->support_fills.entities)
append(object_points, extrusion_entity->as_polyline().points);
for (const ExtrusionEntity *extrusion_entity : layer->support_interface_fills.entities)
append(object_points, extrusion_entity->as_polyline().points);
}
// Repeat points for each object copy.
for (const Point &shift : object->_shifted_copies) {
Points copy_points = object_points;
for (Point &pt : copy_points)
pt.translate(shift);
append(points, copy_points);
}
}
if (points.size() < 3)
// At least three points required for a convex hull.
return;
Polygon convex_hull = Slic3r::Geometry::convex_hull(points);
// Skirt may be printed on several layers, having distinct layer heights,
// but loops must be aligned so can't vary width/spacing
// TODO: use each extruder's own flow
double first_layer_height = this->skirt_first_layer_height();
Flow flow = this->skirt_flow();
float spacing = flow.spacing();
double mm3_per_mm = flow.mm3_per_mm();
std::vector<size_t> extruders;
std::vector<double> extruders_e_per_mm;
{
auto set_extruders = this->extruders();
extruders.reserve(set_extruders.size());
extruders_e_per_mm.reserve(set_extruders.size());
for (auto &extruder_id : set_extruders) {
extruders.push_back(extruder_id);
GCodeConfig config;
config.apply(this->config, true);
extruders_e_per_mm.push_back(Extruder((unsigned int)extruder_id, &config).e_per_mm(mm3_per_mm));
}
}
// Number of skirt loops per skirt layer.
int n_skirts = this->config.skirts.value;
if (this->has_infinite_skirt() && n_skirts == 0)
n_skirts = 1;
// Initial offset of the brim inner edge from the object (possible with a support & raft).
// The skirt will touch the brim if the brim is extruded.
coord_t distance = scale_(std::max(this->config.skirt_distance.value, this->config.brim_width.value));
// Draw outlines from outside to inside.
// Loop while we have less skirts than required or any extruder hasn't reached the min length if any.
std::vector<coordf_t> extruded_length(extruders.size(), 0.);
for (int i = n_skirts, extruder_idx = 0; i > 0; -- i) {
// Offset the skirt outside.
distance += coord_t(scale_(spacing));
// Generate the skirt centerline.
Polygon loop = offset(convex_hull, distance, ClipperLib::jtRound, scale_(0.1)).front();
// Extrude the skirt loop.
ExtrusionLoop eloop(elrSkirt);
eloop.paths.emplace_back(ExtrusionPath(
ExtrusionPath(
erSkirt,
mm3_per_mm, // this will be overridden at G-code export time
flow.width,
first_layer_height // this will be overridden at G-code export time
)));
eloop.paths.back().polyline = loop.split_at_first_point();
this->skirt.append(eloop);
if (this->config.min_skirt_length.value > 0) {
// The skirt length is limited. Sum the total amount of filament length extruded, in mm.
extruded_length[extruder_idx] += unscale(loop.length()) * extruders_e_per_mm[extruder_idx];
if (extruded_length[extruder_idx] < this->config.min_skirt_length.value) {
// Not extruded enough yet with the current extruder. Add another loop.
if (i == 1)
++ i;
} else {
assert(extruded_length[extruder_idx] >= this->config.min_skirt_length.value);
// Enough extruded with the current extruder. Extrude with the next one,
// until the prescribed number of skirt loops is extruded.
if (extruder_idx + 1 < extruders.size())
++ extruder_idx;
}
} else {
// The skirt lenght is not limited, extrude the skirt with the 1st extruder only.
}
}
// Brims were generated inside out, reverse to print the outmost contour first.
this->skirt.reverse();
}
}