/// <summary>
/// update dynamic cutpoint of 2 adjacent edges
/// </summary>
/// <param name="p"></param>
static void UpdateNewEdgeCut(Vertex p)
{
OutsideEdgeLine e0 = p.E0;
OutsideEdgeLine e1 = p.E1;
Vector2f tmp_e0_q = e0._newDynamicMidPoint + e0.GetOriginalEdgeVector();
Vector2f tmp_e1_p = e1._newDynamicMidPoint - e1.GetOriginalEdgeVector();
if (MyMath.FindCutPoint(e0._newDynamicMidPoint, tmp_e0_q, e1._newDynamicMidPoint, tmp_e1_p, out Vector2f cutpoint))
{
p.SetNewXY(cutpoint.X, cutpoint.Y);
}
else
{
//pararell edges
}
}
internal void CreateEdges()
{
int lim = flattenPoints.Count - 1;
Vertex p = null, q = null;
OutsideEdgeLine edgeLine = null;
_edges = new List <OutsideEdgeLine>();
//
for (int i = 0; i < lim; ++i)
{
//in order ...
p = flattenPoints[i];
q = flattenPoints[i + 1];
if ((edgeLine = EdgeLine.FindCommonOutsideEdge(p, q)) != null)
{
//from p point to q
//so ...
//edgeLine is outwardEdge for p.
//edgeLine is inwardEdge for q.
//p.OutwardEdge = q.InwardEdge = edgeLine;
_edges.Add(edgeLine);
}
else
{
//?
}
}
//close
p = flattenPoints[lim];
q = flattenPoints[0];
if ((edgeLine = EdgeLine.FindCommonOutsideEdge(p, q)) != null)
{
//from p point to q
//so ...
//edgeLine is outwardEdge for p.
//edgeLine is inwardEdge for q.
//p.OutwardEdge = q.InwardEdge = edgeLine;
_edges.Add(edgeLine);
}
else
{
//not found
}
}