internal Diagonal(Tangent leftTangent, Tangent rightTangent) {
this.LeftTangent = leftTangent;
this.RightTangent = rightTangent;
}
private void ProcessPolygonQ(Polygon q) {
TangentPair tangentPair = new TangentPair(currentPolygon, q);
if (this.useLeftPTangents)
tangentPair.CalculateLeftTangents();
else
tangentPair.CalculateRightTangents();
Tuple<int, int> couple = useLeftPTangents ? tangentPair.leftPLeftQ : tangentPair.rightPLeftQ;
Tangent t0 = new Tangent(currentPolygon[couple.Item1], q[couple.Item2]);
t0.IsLow = true;
t0.SeparatingPolygons = !this.useLeftPTangents;
couple = useLeftPTangents ? tangentPair.leftPRightQ : tangentPair.rightPRightQ;
Tangent t1 = new Tangent(currentPolygon[couple.Item1], q[couple.Item2]);
t1.IsLow = false;
t1.SeparatingPolygons = this.useLeftPTangents;
t0.Comp = t1;
t1.Comp = t0;
this.tangents.Add(t0);
this.tangents.Add(t1);
this.diagonals.Add(new Diagonal(t0, t1));
}
/// <summary>
/// compare tangents by measuring the counterclockwise angle between the tangent and the edge
/// </summary>
/// <param name="e0"></param>
/// <param name="e1"></param>
/// <returns></returns>
int TangentComparison(Tangent e0, Tangent e1) {
return StemStartPointComparer.CompareVectorsByAngleToXAxis(e0.End.Point - e0.Start.Point, e1.End.Point - e1.Start.Point);
}
private void AddVisibleEdge(Tangent t) {
VisibilityGraph.AddEdge(visibilityGraph.GetVertex(t.Start), visibilityGraph.GetVertex(t.End));
}
/// <summary>
/// compare tangents by measuring the counterclockwise angle between the tangent and the edge
/// </summary>
/// <param name="e0"></param>
/// <param name="e1"></param>
/// <returns></returns>
int TangentComparison(Tangent e0, Tangent e1)
{
return(StemStartPointComparer.CompareVectorsByAngleToXAxis(e0.End.Point - e0.Start.Point, e1.End.Point - e1.Start.Point));
}
private void AddVisibleEdge(Tangent t)
{
VisibilityGraph.AddEdge(visibilityGraph.GetVertex(t.Start), visibilityGraph.GetVertex(t.End));
}