Inverting Surface Normals with Reference to a Point

Using the Invert Surface command you can apply global inversion to all surface normals in a single step. Open the Invert_normals.e3 file from samples folder in the installation and follow the steps below.

1. The model consists of many surfaces as shown below. Currently its normals are randomly oriented.
   
   
   
   
2. Start the Invert Surface command and select all the surfaces.
   
   
3. All the surface normals are now displayed over the surface, as shown below.
   
   
   
   
4. Ensure that the Mode is sent to Normal.
   
   
5. In the Invert Normals drop-down list select By point.
   
   
6. For the By point selector, select the point as shown in the image below.
   
   
   
   
7. All normals are now inverted towards the selected point.
   
   
   
   
8. Apply () the command to recreate the surfaces with the modified orientation of surface normals.