glb_get_surface_normal.pro

NAME: glb_get_surface_normal PURPOSE: Computes the surface normal of a GLOBE object at the given globe position. CATEGORY: NV/LIB/GLB CALLING SEQUENCE: n = glb_get_surface_normal_body(gbd, p) ARGUMENTS: INPUT: gbd: Array (nt) of any subclass of GLOBE descriptors. p: Array (nv,3,nt) of points in the GLOBE system. OUTPUT: NONE KEYWORDS: INPUT: nonorm: If set, the returned vectors are not normalized. body: If set, the inputs given in the BODY system instead of GLOBE. OUTPUT: NONE RETURN: Array (nv, 3, nt) of surface normals in the BODY frame. STATUS: Complete MODIFICATION HISTORY: Written by: Spitale, 1/1998 Adapted by: Spitale, 5/2016