curvature expression function

Returns the curvature of the surface at the given UV coordinates.

See also: unituv, primuv, primduv, normal

Usage

curvature(surface_node, prim_num, u, v)

u and v are unit values, defined in the [0, 1] interval.

Note

if the primitive is a mesh, u and v are defined in terms of its number of rows and columns.