From Gerris
			
												
			stl2gts is a utility for converting an StL file to GTS format.
Usage: stl2gts [OPTION]... < input.stl > output.gts
 -r,     --revert       revert face normals
 -n,     --nomerge      do not merge vertices
 -v,     --verbose      display surface statistics
 -h,     --help         display this help and exit