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Merge pull request #98017 from rburing/clipper2_arc_tolerance

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Restore `arc_tolerance` value when using Clipper2's `InflatePaths`
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Clay John 2024-10-10 15:18:05 +02:00 committed by GitHub
commit 68f053bf82
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1 changed files with 7 additions and 5 deletions
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12
core/math/geometry_2d.cpp
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@ -35,7 +35,8 @@
#define STB_RECT_PACK_IMPLEMENTATION
#include "thirdparty/misc/stb_rect_pack.h"
#define PRECISION 5 // Based on CMP_EPSILON.
const int clipper_precision = 5; // Based on CMP_EPSILON.
const double clipper_scale = Math::pow(10.0, clipper_precision);
Vector<Vector<Vector2>> Geometry2D::decompose_polygon_in_convex(const Vector<Point2> &polygon) {
Vector<Vector<Vector2>> decomp;
@ -224,7 +225,7 @@ Vector<Vector<Point2>> Geometry2D::_polypaths_do_operation(PolyBooleanOperation
path_b[i] = PointD(p_polypath_b[i].x, p_polypath_b[i].y);
}
ClipperD clp(PRECISION); // Scale points up internally to attain the desired precision.
ClipperD clp(clipper_precision); // Scale points up internally to attain the desired precision.
clp.PreserveCollinear(false); // Remove redundant vertices.
if (is_a_open) {
clp.AddOpenSubject({ path_a });
@ -298,9 +299,10 @@ Vector<Vector<Point2>> Geometry2D::_polypath_offset(const Vector<Point2> &p_poly
}
// Inflate/deflate.
PathsD paths = InflatePaths({ polypath }, p_delta, jt, et, 2.0, PRECISION, 0.0);
// Here the miter_limit = 2.0 and arc_tolerance = 0.0 are Clipper2 defaults,
// and the PRECISION is used to scale points up internally, to attain the desired precision.
PathsD paths = InflatePaths({ polypath }, p_delta, jt, et, 2.0, clipper_precision, 0.25 * clipper_scale);
// Here the points are scaled up internally and
// the arc_tolerance is scaled accordingly
// to attain the desired precision.
Vector<Vector<Point2>> polypaths;
for (PathsD::size_type i = 0; i < paths.size(); ++i) {