# AddSurface

NAME

    AddSurface - add surface

SYNOPSIS

    AddSurface expr ( vdw | solvent | contact ) expr
        ( dots | shaded ) ( 0 | 1 )

DESCRIPTION

Add a surface for the selected atoms. The precision (density of the dots) depends on `DrawPrec`.

The first argument is the radius of the atoms, you will normally not change the default value 'vdw'.

The second argument gives the type of surface:

        vdw: van der Waals surface

        solvent: surface given by the center
            of spheres (solvent) touching the atoms

        contact: contact surface (Richards)

The third argument gives the solvent radius for solvent and contact surfaces.

The fourth argument gives the type of surface, dots or a solid, shaded surface can be selected.

The final option selects whether a report with the approximate areas and volumes of all surface parts is desired. The volumes are mainly interesting for cavities. Note that the numbers are not highly precise.

Depending on the precision, shaded surfaces can use a lot of memory. If the machine runs out of memory, the program may crash occasionally.

This command supports groups for shaded surfaces, the resulting surface will belong to the first group member.

EXAMPLE

    AddSurface vdw contact 1.4 dots 0

SEE ALSO

`SelectAtom`, `RadiusAtom`, `DrawPrec`, `Group`, `ColorPrim`, `RemovePrim`, `CalcSurface`

DATE

970723