// path should contain only polylines ( use Flatten )
// furthermore the constructor assumes that all Subpathes of path except the first one are holes
public GpcPolygon(GraphicsPath path)
{
NofContours = 0;
foreach (byte b in path.PathTypes)
{
if ((b & ((byte)PathPointType.CloseSubpath)) != 0)
NofContours++;
}
ContourIsHole = new bool[NofContours];
Contour = new GpcVertexList[NofContours];
for (int i = 0; i < NofContours; i++)
ContourIsHole[i] = (i == 0);
int contourNr = 0;
ArrayList contour = new ArrayList();
for (int i = 0; i < path.PathPoints.Length; i++)
{
contour.Add(path.PathPoints[i]);
if ((path.PathTypes[i] & ((byte)PathPointType.CloseSubpath)) != 0)
{
PointF[] pointArray = (PointF[])contour.ToArray(typeof(PointF));
GpcVertexList vl = new GpcVertexList(pointArray);
Contour[contourNr++] = vl;
contour.Clear();
}
}
}
public void AddContour(GpcVertexList contour, bool contourIsHole)
{
bool[] hole = new bool[NofContours + 1];
GpcVertexList[] cont = new GpcVertexList[NofContours + 1];
for (int i = 0; i < NofContours; i++)
{
hole[i] = ContourIsHole[i];
cont[i] = Contour[i];
}
hole[NofContours] = contourIsHole;
cont[NofContours++] = contour;
ContourIsHole = hole;
Contour = cont;
}