def decimate_surface(points, triangles, n_triangles):
 reduction = (1 - (float(n_triangles) / len(triangles)))
 return _decimate_surface(points, triangles, reduction)

def decimate_surface ( points , triangles , n_triangles ) : reduction = ( 1 - ( float ( n_triangles ) / len ( triangles ) ) ) return _decimate_surface ( points , triangles , reduction )
decimate surface data .