Normal Selection Node

The Normal Selection node creates a selection of elements whose normals point in a specified direction within a given angular threshold. It is useful for selecting geometry that faces a certain way, such as upward-facing surfaces, walls, or elements oriented toward a light or camera.

Inputs

Direction

A vector that defines the reference direction to compare against the element normals. The direction should typically be normalized.

Threshold

The maximum angular difference between the element normal and the given direction for the element to be included in the selection.

Outputs

Selection

A boolean field indicating which elements have normals pointing within the given angular threshold of the specified direction.