Let's say that we start with the following two polygons:
Both are single-outline polygons. The one on the left has collinear lines at 0° on the bottom of the structure. The one on the right has collinear lines at 45° on the bottom right of the structure.
We run the following code:
#include <clipper2/clipper.h>
#include <Utils/clipper.svg.h>
#include <Utils/clipper.svg.utils.h>
using namespace Clipper2Lib;
int main(int argc, char * argv[])
{
Paths64 subject, solution;
SvgWriter svg;
Clipper64 c;
PolyTree64 pt_solution;
Clipper64 c2;
Paths64 solution2;
PolyTree64 pt_solution2;
SvgWriter svg2;
subject.push_back(MakePath({7600000, 9000000, 6600000, 9000000, 6600000, 8750000, 7000000, 8750000, 7000000, 9000000, 7250000, 9000000, 7250000, 8500000, 7000000, 8500000, 7000000, 8750000, 6600000, 8750000, 6600000, 8000000, 7600000, 8000000, 7600000, 9000000}));
c.AddSubject(subject);
c.Execute(ClipType::Union, FillRule::NonZero, solution);
c.Execute(ClipType::Union, FillRule::NonZero, pt_solution);
Paths64 subject2;
subject2.push_back(MakePath({9912310, 8325057, 9288816, 8948550, 8000000, 8567586, 9428364, 8547698, 9585009, 8652365, 9613140, 8624234, 9471719, 8482813, 9428364, 8547698, 8000000, 8567586, 9912310, 8325057}));
c2.AddSubject(subject2);
c2.Execute(ClipType::Union, FillRule::NonZero, solution2);
c2.Execute(ClipType::Union, FillRule::NonZero, pt_solution2);
std::cout << pt_solution << std::endl;
std::cout << pt_solution2 << std::endl;
SvgAddSolution( svg, solution, FillRule::NonZero, false );
SvgSaveToFile( svg, "good_union.svg", 8000, 8000 );
SvgAddSolution( svg2, solution2, FillRule::NonZero, false );
SvgSaveToFile( svg2, "bad_union2.svg", 8000, 8000 );
}The expected output here is that the PolyTree64 will say "Polytree with 1 polygon". Instead, we get:
Polytree with 1 polygon.
Polytree with 2 polygons.
Only the one on the left correctly merges the interior and exterior. The output looks like this:
The one on the right has output with two overlapping polygons:
I think that both polygons should behave the same way. Ideally, I think that the one on the left is the correct output but I'd love to have them synchronized either way
edit: I should have noted that this is testing using current master f1d4916
Let's say that we start with the following two polygons:
Both are single-outline polygons. The one on the left has collinear lines at 0° on the bottom of the structure. The one on the right has collinear lines at 45° on the bottom right of the structure.
We run the following code:
The expected output here is that the PolyTree64 will say "Polytree with 1 polygon". Instead, we get:
Only the one on the left correctly merges the interior and exterior. The output looks like this:
The one on the right has output with two overlapping polygons:
I think that both polygons should behave the same way. Ideally, I think that the one on the left is the correct output but I'd love to have them synchronized either way
edit: I should have noted that this is testing using current master f1d4916