public object Convert(object[] values, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
if (values.Count() == 3)
{
if ((values[0] is double) && (values[1] is LfDragablePointViewModel) && (values[2] is TriangleViewModel))
{
LfDragablePointViewModel origVertex = (LfDragablePointViewModel)values[1];
LfPolygonViewModel polygon = origVertex.Parent;
TriangleViewModel tvm = (TriangleViewModel)values[2];
int i = tvm.PointVms.IndexOf(origVertex);
if (i == -1)
{
return(null);
}
LfDragablePointViewModel vertex;
if (i > 0)
{
vertex = tvm.PointVms[i - 1];
}
else
{
vertex = tvm.PointVms[tvm.PointVms.Count() - 1];
}
Point p = new Point(vertex.PosX, vertex.PosY);
Point rp = polygon.RotatedPointFromLocal(p);
if (parameter as string == "x")
{
return(rp.X);
}
else
{
return(rp.Y);
}
}
}
return(null);
}
public void GenerateTriangles()
{
GeometryUtility.CPoint2D[] polyVertices = new GeometryUtility.CPoint2D[PointVms.Count];
int i = 0;
foreach (LfDragablePointViewModel dpvm in PointVms)
{
// Before triangles are generated we must reorder the identities of the
// vertices to make them consequtive
dpvm.Id = (uint)(i + 1);
polyVertices[i] = new GeometryUtility.CPoint2D(dpvm.PosX, dpvm.PosY, dpvm.Id);
i++;
}
PolygonCuttingEar.CPolygonShape poly = new PolygonCuttingEar.CPolygonShape(polyVertices);
poly.CutEar();
if (LocalModelObject != null)
{
LocalModelObject.Triangles.Clear();
_triangles.Clear();
for (int n = 0; n < poly.NumberOfPolygons; n++)
{
Triangle nt = new Triangle((uint)n + 1, poly.Polygons(n)[0].Id, poly.Polygons(n)[1].Id, poly.Polygons(n)[2].Id);
LocalModelObject.Triangles.Add(nt);
TriangleViewModel ntvm = new TriangleViewModel(this, nt);
_triangles.Add(ntvm);
}
}
}