private static Polygon gpc_polygon_ToPolygon(gpc_polygon gpc_polygon)
{
Polygon polygon = null;
if (gpc_polygon.num_contours > 0)
{
polygon = new Polygon(gpc_polygon.num_contours);
int[] holeInt = new int[polygon.NumContours];
IntPtr ptr = gpc_polygon.hole;
if (polygon.NumContours > 0)
{
Marshal.Copy(gpc_polygon.hole, holeInt, 0, polygon.NumContours);
}
for (int i = 0; i < polygon.NumContours; ++i)
{
polygon.SetHole(i, holeInt[i] != 0);
}
ptr = gpc_polygon.contour;
for (int i = 0; i < polygon.NumContours; ++i)
{
gpc_vertex_list gpc_vtx_list = (gpc_vertex_list)Marshal.PtrToStructure(ptr, typeof(gpc_vertex_list));
int numVertices = gpc_vtx_list.num_vertices;
polygon[i].Capacity = numVertices;
IntPtr ptr2 = gpc_vtx_list.vertex;
for (int j = 0; j < numVertices; ++j)
{
gpc_vertex gpc_vtx = (gpc_vertex)Marshal.PtrToStructure(ptr2, typeof(gpc_vertex));
polygon[i].Add(new Vec2d(gpc_vtx.x, gpc_vtx.y));
ptr2 = (IntPtr)(((int)ptr2) + Marshal.SizeOf(gpc_vtx));
}
ptr = (IntPtr)(((int)ptr) + Marshal.SizeOf(gpc_vtx_list));
}
}
return(polygon);
}
public static Polygon VectorListsToPolygon(List <List <Vec2> > lists)
{
Polygon p = new Polygon(lists.Count);
int index = 0;
foreach (List <Vec2> list in lists)
{
p.SetContour(index, Vec2d.FromVec2List(list));
p.SetHole(index++, false);
}
return(p);
}
