diff --git a/visu.py b/visu.py
index 89c1a21..9c4b2da 100644
--- a/visu.py
+++ b/visu.py
@@ -166,7 +166,7 @@ def warped_surface_rectilinear(x,y,z,data,axis):
     grid['warp'] = data.transpose().ravel()
     return grid.warp_by_scalar(normal=normal)
 
-def warped_surface_uniform(origin,spacing,data,axis):
+def warped_surface_uniform(origin,spacing,data,axis,factor=1.0):
     import numpy as np
     import pyvista as pv
     assert data.shape[axis]==1
@@ -177,6 +177,6 @@ def warped_surface_uniform(origin,spacing,data,axis):
     grid.origin     = origin
     grid.spacing    = spacing
     grid['warp']    = data.transpose().ravel()
-    return grid.warp_by_scalar(normal=normal)
+    return grid.warp_by_scalar(normal=normal,factor=factor)
 
 #def extend_structuredgrid(sg,bounds,rep,axis):