private static IRing StitchPaths(this IPath[] paths, EdgeIndices edgeIndices)
{
IRing result = new Ring();
foreach (var edgeIndex in edgeIndices)
{
var path = paths[edgeIndex];
if (path.PointCount == 0)
{
continue;
}
if (result.PointCount == 0)
{
result.AddPoints(path.ToArray());
}
else
{
var lastPoint = result[result.PointCount - 1];
if (lastPoint.Equals(path[0]))
{
result.AddPoints(path.ToArray(1));
}
else if (lastPoint.Equals(path[path.PointCount - 1]))
{
result.AddPoints(path.ToArray(1, true));
}
else
{
throw new Exception("Can't stitch path to ring");
}
}
}
return(result);
}