VARKON Version 1.18 2004-07-31

> # 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
> sort_mesh | Sort mesh faces in X, Y or Z direction
> 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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