/// <summary>
/// the Quadrangle should be convex
/// </summary>
/// <param name="firstCEdge"></param>
/// <param name="intIndex"></param>
public static CEdge TriangulateQuadrangle_Delaunay(CEdge firstCEdge)
{
//the four edges constitutes a counter clockwise loop
var secondCEdge = firstCEdge.cedgeNext;
var thirdCEdge = secondCEdge.cedgeNext;
var fourthCEdge = thirdCEdge.cedgeNext;
firstCEdge.JudgeAndSetAxisAngle();
secondCEdge.JudgeAndSetAxisAngle();
thirdCEdge.JudgeAndSetAxisAngle();
fourthCEdge.JudgeAndSetAxisAngle();
CEdge newCEdge1 = new CEdge(firstCEdge.FrCpt, thirdCEdge.FrCpt);
CEdge newCEdge2 = new CEdge(firstCEdge.ToCpt, thirdCEdge.ToCpt);
newCEdge1.SetAxisAngle();
newCEdge2.SetAxisAngle();
var dblMinAngle1 = GetDividedMinAngle(newCEdge1, firstCEdge, secondCEdge, thirdCEdge, fourthCEdge);
var dblMinAngle2 = GetDividedMinAngle(newCEdge2, secondCEdge, thirdCEdge, fourthCEdge, firstCEdge);
if (dblMinAngle1 <= dblMinAngle2)
{
return(newCEdge1);
}
else
{
return(newCEdge2);
}
}
public CEdge SetBaseLine(bool isSetLength = false, bool isSetAxisAngle = false)
{
var pbaseline = new CEdge(this.FrCpt, this.ToCpt);
if (isSetLength == true)
{
pbaseline.SetLength();
}
if (isSetAxisAngle == true)
{
pbaseline.SetAxisAngle();
}
_pBaseLine = pbaseline;
return(pbaseline);
}