nextus/src/lineClipper.cpp


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33

#include "lineClipper.h"

vector <colourPolyline> lineClipper::mask(
	vector <colourPolyline> shapes,
	vector <ofPolyline> mask,
	bool invert
	)
{
	vector <colourPolyline> output;

	ofx::Clipper clipper;
		
	for (auto& shape: shapes)
    {	
    	clipper.Clear();
		clipper.addPolylines(mask, ClipperLib::ptClip);
		vector <ofPolyline> polys; //TODO make clipper clip colourpolylines
    	shapes.push_back(shape);
    	clipper.addPolylines(polys,ClipperLib::ptSubject);
		vector <ofPolyline> clipped;
		if (invert){
			clipped = clipper.getClipped(ClipperLib::ctDifference);
		}else {
			clipped = clipper.getClipped(ClipperLib::ctIntersection);
		}
		for (auto& clip: clipped)
	    {
	    	//clip.simplify(contour_simplify);
	        output.push_back(colourPolyline(clip,shape.getColourAt(0)));
	    }
    }
    return output;
}