VARKON Version 1.16 1998-04-27
Geometrical routines
on A position on an entity startp The start position of a line, arc or curve endp The end position of a line, arc or curve tang The tangent of an entity curv The curvature of an entity arcl The length of an entity inv_on Inverse on inv_on_sur Inverse on surface inv_tang Inverse tangent inv_curv Inverse curvature inv_arcl Inverse arclength centre Centre of curvature norm Normal of entity angle Angle area Area of 2D bounded region surface_area Area of 3D surface section_area Area bounded by 3D curve cgrav Center of gravity eval Evaluate coordinates and derivatives intersect Intersect position n_intersect Number of intersect positions n_cur_int Number of intersect curves all_int_lin_sur All intersects line/surface all_int_lin_msur All intersects line/multiple surface vec Cartesian coordinates vecp Polar coordinates vecl Length of vector vecn Normalises vector vprod Vector product mode_local Activates local coordinate system mode_global Activates global coordinate system mode_basic Activates basic coordinate system trim Clips or extends entity refc Converts integers to ref global_ref Creates global reference
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