public static Polygon Shape1minus2(List <Vec2> shape1, List <Vec2> shape2)
{
Polygon p1 = new Polygon(shape1);
Polygon p2 = new Polygon(shape2);
return(GpcWrapper.Clip(GpcWrapper.GpcOperation.Difference, p1, p2));
}
public static List <Vec2i> IntersectShapes(List <Vec2i> shape1, List <Vec2i> shape2)
{
Polygon p1 = new Polygon(shape1);
Polygon p2 = new Polygon(shape2);
Polygon p = GpcWrapper.Clip(GpcWrapper.GpcOperation.Intersection, p1, p2);
if (p == null || p.NumContours != 1)
{
return(new List <Vec2i>());
}
return(Vec2i.FromVec2dList(p[0]));
}
public static Geometry.Shape BoxesToShape(List <Box2> boxes)
{
if (boxes.Count == 0)
{
return(null);
}
Polygon p = null;
foreach (Box2 b in boxes)
{
if (b.Dimensions.X > 0.0001 && b.Dimensions.Y > 0.0001)
{
Polygon pb = new Polygon(b.Corners());
if (p == null)
{
p = pb;
}
else
{
try
{
Polygon newPoly = GpcWrapper.Clip(GpcWrapper.GpcOperation.Union, p, pb);
p = newPoly;
}
catch (Exception)
{
throw;
}
}
}
}
List <List <Vec2> > vlists = PolygonToVectorLists(p);
if (vlists.Count == 0)
{
return(null);
}
return(new Geometry.Shape(vlists[0]));
}