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// Adaptive cubic infill was inspired by the work of @mboerwinkle
// as implemented for Cura.
// https://github.com/Ultimaker/CuraEngine/issues/381
// https://github.com/Ultimaker/CuraEngine/pull/401
//
// Our implementation is more accurate (discretizes a bit less cubes than Cura's)
// by splitting only such cubes which contain a triangle.
// Our line extraction is time optimal instead of O(n^2) when connecting extracted lines,
// and we also implemented adaptivity for supporting internal overhangs only.
#ifndef slic3r_FillAdaptive_hpp_
#define slic3r_FillAdaptive_hpp_
#include "FillBase.hpp"
struct indexed_triangle_set;
namespace Slic3r {
class PrintObject;
namespace FillAdaptive
{
struct Octree;
// To keep the definition of Octree opaque, we have to define a custom deleter.
struct OctreeDeleter { void operator()(Octree *p); };
using OctreePtr = std::unique_ptr<Octree, OctreeDeleter>;
// Calculate line spacing for
// 1) adaptive cubic infill
// 2) adaptive internal support cubic infill
// Returns zero for a particular infill type if no such infill is to be generated.
std::pair<double, double> adaptive_fill_line_spacing(const PrintObject &print_object);
// Rotation of the octree to stand on one of its corners.
Eigen::Quaterniond transform_to_world();
// Inverse roation of the above.
Eigen::Quaterniond transform_to_octree();
FillAdaptive::OctreePtr build_octree(
// Mesh is rotated to the coordinate system of the octree.
const indexed_triangle_set &triangle_mesh,
// Overhang triangles extracted from fill surfaces with stInternalBridge type,
// rotated to the coordinate system of the octree.
const std::vector<Vec3d> &overhang_triangles,
coordf_t line_spacing,
// If true, octree is densified below internal overhangs only.
bool support_overhangs_only);
//
// Some of the algorithms used by class FillAdaptive were inspired by
// Cura Engine's class SubDivCube
// https://github.com/Ultimaker/CuraEngine/blob/master/src/infill/SubDivCube.h
//
class Filler : public Slic3r::Fill
{
public:
~Filler() override {}
protected:
Fill* clone() const override { return new Filler(*this); };
void _fill_surface_single(
const FillParams ¶ms,
unsigned int thickness_layers,
const std::pair<float, Point> &direction,
ExPolygon expolygon,
Polylines &polylines_out) override;
// Let the G-code export reoder the infill lines.
//FIXME letting the G-code exporter to reorder infill lines of Adaptive Cubic Infill
// may not be optimal as the internal infill lines may get extruded before the long infill
// lines to which the short infill lines are supposed to anchor.
bool no_sort() const override { return false; }
};
}; // namespace FillAdaptive
} // namespace Slic3r
#endif // slic3r_FillAdaptive_hpp_
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