////////////////////////////////////////////////////////////////////////////////////////////////////
/// <summary>
/// Returns a <see cref="T:System.String" /> that represents the current <see cref="T:System.Object" />.
/// </summary>
/// <remarks> Darrellp, 2/21/2011. </remarks>
/// <returns>
/// A <see cref="T:System.String" /> that represents the current <see cref="T:System.Object" />.
/// </returns>
////////////////////////////////////////////////////////////////////////////////////////////////////
public override string ToString()
{
var strStart = VtxStart?.ToString() ?? "Inf";
var strEnd = VtxEnd?.ToString() ?? "Inf";
return(strStart + " - " + strEnd);
}
////////////////////////////////////////////////////////////////////////////////////////////////////
/// <summary>
/// Determine if a point is to the left of this edge when facing from the start vertex to the end
/// vertex.
/// </summary>
/// <remarks> Darrellp, 2/18/2011. </remarks>
/// <param name="pt"> Point to check out. </param>
/// <returns> true if it succeeds, false if it fails. </returns>
////////////////////////////////////////////////////////////////////////////////////////////////////
public bool FLeftOf(Vector pt)
{
// We should never have a start vertex at infinity
//
// Fortune.ProcessRay(), which creates the vertices at infinity, specifically makes sure that
// this never happens (except with edges at infinity which are really placeholders for the
// winged edge structure and have no position at all. They aren't processed here (and if they
// were, it would be a problem). While this is a touch Fortune specific, there's no reason not to
// insist on it in the general case.
// If the end vtx is at infinity, convert it to a real point
var pt1 = VtxStart.Pt;
var pt2 = VtxEnd.FAtInfinity ? VtxEnd.ConvertToReal(pt1, 10) : VtxEnd.Pt;
// Do the geometry on pt1 and pt2
return(Geometry2D.FLeft(pt1, pt2, pt));
}
////////////////////////////////////////////////////////////////////////////////////////////////////
/// <summary> Ensure that this edge connects to the passed in edge. </summary>
/// <remarks> Darrellp, 2/18/2011. </remarks>
/// <param name="edge"> Edge to check. </param>
/// <returns> True if this edge connects to the passed in edge, else false. </returns>
////////////////////////////////////////////////////////////////////////////////////////////////////
internal bool FConnectsToEdge(WeEdge edge)
{
// Has to be adjacent to either our start or our end vertex
return(VtxEnd.FValidateEdgeIsAdjacent(edge) || VtxStart.FValidateEdgeIsAdjacent(edge));
}
/// <summary>
/// Validate the edge information
/// </summary>
/// <returns></returns>
internal bool Validate()
{
// RQS- All variables should be set
if (VtxEnd == null)
{
return(Failure());
}
if (VtxStart == null)
{
return(Failure());
}
if (EdgeCCWPredecessor == null)
{
return(Failure());
}
if (EdgeCCWSuccessor == null)
{
return(Failure());
}
if (EdgeCWPredecessor == null)
{
return(Failure());
}
if (EdgeCWSuccessor == null)
{
return(Failure());
}
if (PolyLeft == null)
{
return(Failure());
}
if (PolyRight == null)
{
return(Failure());
}
// -RQS
// RQS- Check adjacencies
//
// Make sure that we and all our CW/CCW successor/predecessor edges
// are marked as adjacent in our start/end vertices
if (!VtxEnd.FValidateEdgeIsAdjacent(this))
{
return(Failure());
}
if (!VtxStart.FValidateEdgeIsAdjacent(EdgeCCWPredecessor))
{
return(Failure());
}
if (!VtxEnd.FValidateEdgeIsAdjacent(EdgeCCWSuccessor))
{
return(Failure());
}
if (!VtxStart.FValidateEdgeIsAdjacent(EdgeCWPredecessor))
{
return(Failure());
}
if (!VtxEnd.FValidateEdgeIsAdjacent(EdgeCWSuccessor))
{
return(Failure());
}
if (!VtxStart.FValidateEdgeIsAdjacent(this))
{
return(Failure());
}
// -RQS
// RQS- Check adjacency of all listed edges to the proper polygons
if (!PolyLeft.FValidateEdgeIsAdjacent(this))
{
return(Failure());
}
if (!PolyRight.FValidateEdgeIsAdjacent(this))
{
return(Failure());
}
if (!PolyLeft.FValidateEdgeIsAdjacent(EdgeCWSuccessor))
{
return(Failure());
}
if (!PolyLeft.FValidateEdgeIsAdjacent(EdgeCCWPredecessor))
{
return(Failure());
}
if (!PolyRight.FValidateEdgeIsAdjacent(EdgeCCWSuccessor))
{
return(Failure());
}
if (!PolyRight.FValidateEdgeIsAdjacent(EdgeCWPredecessor))
{
return(Failure());
}
// -RQS
return(true);
}
