Selecting all the outer surfaces of a group of polysurfaces

[kev.r (Kevin)]

I answered this in your other post here:

Adjusting normals

Compare your normals with the Dot Product component. If you get a negative result the square needs to be flipped. Here’s a simple example that uses the Dot Product component to compare surface normals to a Unit Z vector. Positive results are colored blue, negative results are colored red, and zero results are colored yellow. [dot_prod_01] [dot_prod_02] dot_product_example.gh (38.5 KB) -Kevin

Please don’t post multiple threads about the same topic. If you have additional information or questions it is better post again to the original thread.

-Kevin