3DPrinting/PrusaSlicer-NonPlainar
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clip_clipper_polygon_with_subject_bbox() and diff_clipped() extracted

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from TreeSupports to ClipperUtils to be generally available.
diff_clipped() is an optimized version clipping the "clipping" polygon
using clip_clipper_polygon_with_subject_bbox().
To be used with complex clipping polygons, where majority
of the clipping polygons are outside of the source polygon.
This commit is contained in:
Vojtech Bubnik 2022-11-15 16:54:26 +01:00
parent db3f696888
commit babc8a88a1
3 changed files with 117 additions and 71 deletions
Download patch file Download diff file Expand all files Collapse all files

20
src/libslic3r/ClipperUtils.hpp
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@ -24,6 +24,8 @@ using Slic3r::ClipperLib::jtSquare;
namespace Slic3r {
class BoundingBox;
static constexpr const float ClipperSafetyOffset = 10.f;
static constexpr const Slic3r::ClipperLib::JoinType DefaultJoinType = Slic3r::ClipperLib::jtMiter;
@ -306,6 +308,21 @@ namespace ClipperUtils {
const SurfacesPtr &m_surfaces;
size_t m_size;
};
// For ClipperLib with Z coordinates.
using ZPoint = Vec3i32;
using ZPoints = std::vector<Vec3i32>;
// Clip source polygon to be used as a clipping polygon with a bouding box around the source (to be clipped) polygon.
// Useful as an optimization for expensive ClipperLib operations, for example when clipping source polygons one by one
// with a set of polygons covering the whole layer below.
void clip_clipper_polygon_with_subject_bbox(const Points &src, const BoundingBox &bbox, Points &out);
void clip_clipper_polygon_with_subject_bbox(const ZPoints &src, const BoundingBox &bbox, ZPoints &out);
[[nodiscard]] Points clip_clipper_polygon_with_subject_bbox(const Points &src, const BoundingBox &bbox);
[[nodiscard]] ZPoints clip_clipper_polygon_with_subject_bbox(const ZPoints &src, const BoundingBox &bbox);
void clip_clipper_polygon_with_subject_bbox(const Polygon &src, const BoundingBox &bbox, Polygon &out);
[[nodiscard]] Polygon clip_clipper_polygon_with_subject_bbox(const Polygon &src, const BoundingBox &bbox);
[[nodiscard]] Polygons clip_clipper_polygons_with_subject_bbox(const Polygons &src, const BoundingBox &bbox);
}
// offset Polygons
@ -391,6 +408,9 @@ Slic3r::Lines _clipper_ln(ClipperLib::ClipType clipType, const Slic3r::Lines &su
Slic3r::Polygons diff(const Slic3r::Polygon &subject, const Slic3r::Polygon &clip, ApplySafetyOffset do_safety_offset = ApplySafetyOffset::No);
Slic3r::Polygons diff(const Slic3r::Polygons &subject, const Slic3r::Polygons &clip, ApplySafetyOffset do_safety_offset = ApplySafetyOffset::No);
Slic3r::Polygons diff(const Slic3r::Polygons &subject, const Slic3r::ExPolygons &clip, ApplySafetyOffset do_safety_offset = ApplySafetyOffset::No);
// Optimized version clipping the "clipping" polygon using clip_clipper_polygon_with_subject_bbox().
// To be used with complex clipping polygons, where majority of the clipping polygons are outside of the source polygon.
Slic3r::Polygons diff_clipped(const Slic3r::Polygons &src, const Slic3r::Polygons &clipping, ApplySafetyOffset do_safety_offset = ApplySafetyOffset::No);
Slic3r::Polygons diff(const Slic3r::ExPolygons &subject, const Slic3r::Polygons &clip, ApplySafetyOffset do_safety_offset = ApplySafetyOffset::No);
Slic3r::Polygons diff(const Slic3r::ExPolygons &subject, const Slic3r::ExPolygons &clip, ApplySafetyOffset do_safety_offset = ApplySafetyOffset::No);
Slic3r::Polygons diff(const Slic3r::Surfaces &subject, const Slic3r::Polygons &clip, ApplySafetyOffset do_safety_offset = ApplySafetyOffset::No);