private Subpath TransformSubpath(Subpath subpath, Matrix newCtm)
{
Subpath newSubpath = new Subpath();
newSubpath.SetClosed(subpath.IsClosed());
foreach (IShape segment in subpath.GetSegments())
{
IShape transformedSegment = TransformSegment(segment, newCtm);
newSubpath.AddSegment(transformedSegment);
}
return(newSubpath);
}
public virtual void SquareClippingTest()
{
Subpath squareSubpath = new Subpath(new Point(10, 10));
squareSubpath.AddSegment(new Line(10, 10, 10, 30));
squareSubpath.AddSegment(new Line(10, 30, 30, 30));
squareSubpath.AddSegment(new Line(30, 30, 30, 10));
squareSubpath.AddSegment(new Line(30, 10, 10, 10));
squareSubpath.SetClosed(true);
Path squarePath = new Path();
squarePath.AddSubpath(squareSubpath);
Subpath rectangleSubpath = new Subpath(new Point(20, 20));
rectangleSubpath.AddSegment(new Line(20, 20, 20, 40));
rectangleSubpath.AddSegment(new Line(20, 40, 30, 40));
rectangleSubpath.AddSegment(new Line(30, 40, 30, 20));
rectangleSubpath.AddSegment(new Line(30, 20, 20, 20));
rectangleSubpath.SetClosed(true);
Path rectanglePath = new Path();
rectanglePath.AddSubpath(rectangleSubpath);
Clipper clipper = new Clipper();
ClipperBridge.AddPath(clipper, squarePath, PolyType.SUBJECT);
ClipperBridge.AddPath(clipper, rectanglePath, PolyType.CLIP);
PolyTree polyTree = new PolyTree();
clipper.Execute(ClipType.UNION, polyTree);
Path result = ClipperBridge.ConvertToPath(polyTree);
NUnit.Framework.Assert.AreEqual(new Point(20, 40), result.GetCurrentPoint());
NUnit.Framework.Assert.AreEqual(2, result.GetSubpaths().Count);
Subpath closedPath = result.GetSubpaths()[0];
NUnit.Framework.Assert.AreEqual(new Point(20, 40), closedPath.GetStartPoint());
IList <IShape> closedPartSegments = closedPath.GetSegments();
NUnit.Framework.Assert.AreEqual(5, closedPartSegments.Count);
NUnit.Framework.Assert.IsTrue(AreShapesEqual(new Line(20, 40, 20, 30), closedPartSegments[0]));
NUnit.Framework.Assert.IsTrue(AreShapesEqual(new Line(20, 30, 10, 30), closedPartSegments[1]));
NUnit.Framework.Assert.IsTrue(AreShapesEqual(new Line(10, 30, 10, 10), closedPartSegments[2]));
NUnit.Framework.Assert.IsTrue(AreShapesEqual(new Line(10, 10, 30, 10), closedPartSegments[3]));
NUnit.Framework.Assert.IsTrue(AreShapesEqual(new Line(30, 10, 30, 40), closedPartSegments[4]));
NUnit.Framework.Assert.IsTrue(closedPath.IsClosed());
Subpath openPart = result.GetSubpaths()[1];
NUnit.Framework.Assert.AreEqual(new Point(20, 40), openPart.GetStartPoint());
NUnit.Framework.Assert.AreEqual(0, openPart.GetSegments().Count);
NUnit.Framework.Assert.IsFalse(openPart.IsClosed());
}