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WIP "ensure verticall wall thickness" rework:

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1) New region expansion code to propagate wave from a boundary
   of a region inside of it.
2) get_extents() extended with a template attribute to work with
   zero area data sets.
3) ClipperZUtils.hpp for handling Clipper operation with Z coordinate
   (for source contour identification)
This commit is contained in:
Vojtech Bubnik 2022-12-20 09:09:10 +01:00
parent d3734aa5ae
commit 11c0e567a6
19 changed files with 964 additions and 85 deletions
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71
tests/fff_print/test_clipper.cpp
View file

@ -1,7 +1,7 @@
#include <catch2/catch.hpp>
#include "test_data.hpp"
#include "clipper/clipper_z.hpp"
#include "libslic3r/ClipperZUtils.hpp"
#include "libslic3r/clipper.hpp"
using namespace Slic3r;
@ -132,3 +132,72 @@ SCENARIO("Clipper Z", "[ClipperZ]")
REQUIRE(pt.z() == 1);
}
SCENARIO("Intersection with multiple polylines", "[ClipperZ]")
{
// 1000x1000 CCQ square
ClipperLib_Z::Path clip { { 0, 0, 1 }, { 1000, 0, 1 }, { 1000, 1000, 1 }, { 0, 1000, 1 } };
// Two lines interseting inside the square above, crossing the bottom edge of the square.
ClipperLib_Z::Path line1 { { +100, -100, 2 }, { +900, +900, 2 } };
ClipperLib_Z::Path line2 { { +100, +900, 3 }, { +900, -100, 3 } };
ClipperLib_Z::Clipper clipper;
ClipperZUtils::ClipperZIntersectionVisitor::Intersections intersections;
ClipperZUtils::ClipperZIntersectionVisitor visitor(intersections);
clipper.ZFillFunction(visitor.clipper_callback());
clipper.AddPath(line1, ClipperLib_Z::ptSubject, false);
clipper.AddPath(line2, ClipperLib_Z::ptSubject, false);
clipper.AddPath(clip, ClipperLib_Z::ptClip, true);
ClipperLib_Z::PolyTree polytree;
ClipperLib_Z::Paths paths;
clipper.Execute(ClipperLib_Z::ctIntersection, polytree, ClipperLib_Z::pftNonZero, ClipperLib_Z::pftNonZero);
ClipperLib_Z::PolyTreeToPaths(polytree, paths);
REQUIRE(paths.size() == 2);
THEN("First output polyline is a trimmed 2nd line") {
// Intermediate point (intersection) was removed)
REQUIRE(paths.front().size() == 2);
REQUIRE(paths.front().front().z() == 3);
REQUIRE(paths.front().back().z() < 0);
REQUIRE(intersections[- paths.front().back().z() - 1] == std::pair<coord_t, coord_t>(1, 3));
}
THEN("Second output polyline is a trimmed 1st line") {
// Intermediate point (intersection) was removed)
REQUIRE(paths[1].size() == 2);
REQUIRE(paths[1].front().z() < 0);
REQUIRE(paths[1].back().z() == 2);
REQUIRE(intersections[- paths[1].front().z() - 1] == std::pair<coord_t, coord_t>(1, 2));
}
}
SCENARIO("Interseting a closed loop as an open polyline", "[ClipperZ]")
{
// 1000x1000 CCQ square
ClipperLib_Z::Path clip{ { 0, 0, 1 }, { 1000, 0, 1 }, { 1000, 1000, 1 }, { 0, 1000, 1 } };
// Two lines interseting inside the square above, crossing the bottom edge of the square.
ClipperLib_Z::Path rect{ { 500, 500, 2}, { 500, 1500, 2 }, { 1500, 1500, 2}, { 500, 1500, 2}, { 500, 500, 2 } };
ClipperLib_Z::Clipper clipper;
clipper.AddPath(rect, ClipperLib_Z::ptSubject, false);
clipper.AddPath(clip, ClipperLib_Z::ptClip, true);
ClipperLib_Z::PolyTree polytree;
ClipperLib_Z::Paths paths;
ClipperZUtils::ClipperZIntersectionVisitor::Intersections intersections;
ClipperZUtils::ClipperZIntersectionVisitor visitor(intersections);
clipper.ZFillFunction(visitor.clipper_callback());
clipper.Execute(ClipperLib_Z::ctIntersection, polytree, ClipperLib_Z::pftNonZero, ClipperLib_Z::pftNonZero);
ClipperLib_Z::PolyTreeToPaths(std::move(polytree), paths);
THEN("Open polyline is clipped into two pieces") {
REQUIRE(paths.size() == 2);
REQUIRE(paths.front().size() == 2);
REQUIRE(paths.back().size() == 2);
REQUIRE(paths.front().front().z() == 2);
REQUIRE(paths.back().back().z() == 2);
REQUIRE(paths.front().front().x() == paths.back().back().x());
REQUIRE(paths.front().front().y() == paths.back().back().y());
}
}