/// <summary>
/// Buffer polygons by buffering the individual boundary segments and
/// either unioning or differencing them.
/// </summary>
/// <param name="g"></param>
/// <param name="distance"></param>
/// <returns>The buffer geometry</returns>
public static IGeometry BufferBySegments(IGeometry g, double distance)
{
var segs = LineHandlingFunctions.ExtractSegments(g);
var posDist = Math.Abs(distance);
var segBuf = BufferByComponents(segs, posDist);
if (distance < 0.0)
{
return(g.Difference(segBuf));
}
return(g.Union(segBuf));
}
public static IGeometry BufferByChains(IGeometry g, double distance, int maxChainSize)
{
if (maxChainSize <= 0)
{
throw new ArgumentOutOfRangeException("maxChainSize", "Maximum Chain Size must be specified as an input parameter");
}
var segs = LineHandlingFunctions.ExtractChains(g, maxChainSize);
double posDist = Math.Abs(distance);
var segBuf = BufferByComponents(segs, posDist);
if (distance < 0.0)
{
return(g.Difference(segBuf));
}
return(g.Union(segBuf));
}