nextus/src/lineClipper.cpp


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#include "lineClipper.h"

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

	ofx::Clipper clipper;
	
	clipper.Clear();
	clipper.addRectangle(frame, ClipperLib::ptClip, true);
	vector <ofPolyline> polys; //TODO make clipper clip colourpolylines

	for (auto& shape: shapes) polys.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,shapes[0].getColourAt(0)));
    }
   
    return output;
}