The Normal node generates a normal vector and a dot product.
- Normal vector input.
- Normal Direction
- To manually set a fixed normal direction vector. LMB click and drag on the sphere to set the direction of the normal. Holding Ctrl while dragging snaps to 45 degree rotation increments.
- Normal vector output.
Dot product output. The dot product is a scalar value.
- If two normals are pointing in the same direction the dot product is 1.
- If they are perpendicular the dot product is zero (0).
- If they are antiparallel (facing directly away from each other) the dot product is -1.