public static string GenerateCurvedPath(this BaseLinkModel link)
{
var sX = link.GetMiddleSourceX();
var sY = link.GetMiddleSourceY();
double tX, tY;
if (link.IsAttached)
{
tX = link.GetMiddleTargetX();
tY = link.GetMiddleTargetY();
}
else
{
tX = link.OnGoingPosition !.X;
tY = link.OnGoingPosition.Y;
}
var cX = (sX + tX) / 2;
var cY = (sY + tY) / 2;
var curvePointA = GetCurvePoint(sX, sY, cX, cY, link.SourcePort.Alignment);
var curvePointB = GetCurvePoint(tX, tY, cX, cY, link.TargetPort?.Alignment);
return(FormattableString.Invariant($"M {sX} {sY} C {curvePointA}, {curvePointB}, {tX} {tY}"));
}
/// <summary>
/// If the link is attached, returns the same output as GetMiddleTargetY().
/// Otherwise, returns the Y value of link's ongoing position.
/// </summary>
/// <param name="link">The BaseLinkModel entity</param>
public static double GetTargetY(this BaseLinkModel link)
{
if (!link.IsAttached)
{
return(link.OnGoingPosition !.Y);
}
return(link.GetMiddleTargetY());
}