internal static FlattenedSegment Create(Line?previousCenter, Line center, Line?nextCenter, double strokeThickness)
{
return(CreateOffset(center, Offset(strokeThickness / 2), Offset(-strokeThickness / 2)));
Line Offset(double offset)
{
var ol = center.Offset(offset);
if (previousCenter is { } pl&&
pl.Length > 0 &&
ol.TrimOrExtendStartWith(pl.Offset(offset)) is { } temp1)
{
ol = temp1;
}
if (nextCenter is { } nl&&
nl.Length > 0 &&
ol.TrimOrExtendEndWith(nl.Offset(offset)) is { } temp2)
{
ol = temp2;
}
return(ol);
}
}
internal static FlattenedSegment CreateEndLineCap(Line line, PenLineCap endLineCap, double strokeThickness)
{
switch (endLineCap)
{
case PenLineCap.Square:
var cl = new Line(line.EndPoint, line.EndPoint + (strokeThickness / 2 * line.Direction));
return(CreateOffset(cl, cl.Offset(strokeThickness / 2), cl.Offset(-strokeThickness / 2)));
case PenLineCap.Round:
return(CreateRound(line, strokeThickness, isStart: false));
case PenLineCap.Triangle:
return(CreateTriangle(line, strokeThickness, isStart: false));
case PenLineCap.Flat:
default:
throw new ArgumentOutOfRangeException(nameof(endLineCap), endLineCap, "Unknown line cap.");
}
}