Surfsect surface node

Trims or creates profile curves along the intersection lines between NURBS or bezier surfaces.

See also: Curvesect, , Cookie, Trim 2 more , Carve, Round

This op performs boolean operations with NURBS and Bezier surfaces, or only generates profiles where the surfaces intersect. The individual surfaces do not need to be solids (i.e. wrap in U and V), nor do they need to form a solid as a group (for example, you can cut a grid with a sphere).

The surfaces in the first input are denoted by “A” in the parameter list. The surfaces in the second input are denoted by “B”. The entire A set is intersected with the B set, which allows for true csg operations with spline surfaces. Thus, if A forms a solid and B forms a solid, any boolean operation between A and B will produce a solid. If either set has an open topology, the result will also be open.

What is deemed to be the inside and outside of a trim region depends on the direction of the surface normals. If necessary, use the Primitive SOP to reverse the surface normals by reversing the surface’s U or V direction.