/// <summary>
///
/// </summary>
/// <param name="subdiv"></param>
/// <param name="img"></param>
private void PaintVoronoi(CvSubdiv2D subdiv, IplImage img)
{
CvSeqReader reader = new CvSeqReader();
int total = subdiv.Edges.Total;
int elem_size = subdiv.Edges.ElemSize;
subdiv.CalcVoronoi2D();
subdiv.Edges.StartRead(reader, false);
for (int i = 0; i < total; i++)
{
CvQuadEdge2D edge = CvQuadEdge2D.FromSeqReader(reader);
//CvQuadEdge2D edge = CvQuadEdge2D.FromPtr(reader.Ptr);
if (Cv.IS_SET_ELEM(edge))
{
CvSubdiv2DEdge e = edge.ToCvSubdiv2DEdge();
// left
DrawSubdivFacet(img, e.RotateEdge(RotateEdgeFlag.Rotate));
// right
DrawSubdivFacet(img, e.RotateEdge(RotateEdgeFlag.ReverseRotate));
}
reader.NextSeqElem(elem_size);
//Cv.NEXT_SEQ_ELEM(elem_size, reader);
}
}
/// <summary>
///
/// </summary>
/// <param name="img"></param>
/// <param name="edge"></param>
private void DrawSubdivFacet(IplImage img, CvSubdiv2DEdge edge)
{
CvSubdiv2DEdge t = edge;
int count = 0;
// count number of edges in facet
do
{
count++;
t = t.GetEdge(CvNextEdgeType.NextAroundLeft);
} while (t != edge);
CvPoint[] buf = new CvPoint[count];
// gather points
t = edge;
int i;
for (i = 0; i < count; i++)
{
CvSubdiv2DPoint pt = t.Org();
if (pt == null)
{
break;
}
buf[i] = pt.Pt;
t = t.GetEdge(CvNextEdgeType.NextAroundLeft);
}
if (i == count)
{
Random rand = new Random();
CvSubdiv2DPoint pt = edge.RotateEdge(RotateEdgeFlag.Rotate).Dst();
img.FillConvexPoly(buf, CvColor.Random(), LineType.AntiAlias, 0);
img.PolyLine(new CvPoint[][] { buf }, true, CvColor.Black, 1, LineType.AntiAlias, 0);
DrawSubdivPoint(img, pt.Pt, CvColor.Black);
}
}