# PLANE

Section can be repeated.

This section defines the plane. When using this colvar, two plane section must be defined! [Edit on GitHub]

## Keywords

- ATOMS

- DEF_TYPE

- NORMAL_VECTOR

## Keyword descriptions

ATOMS: integer[3]

  Usage: ATOMS <INTEGER> <INTEGER> <INTEGER>

  Specifies the indexes of 3 atoms/points defining the plane. [Edit on GitHub]

DEF_TYPE: enum = ATOMS

  Usage: DEF_TYPE ATOMS

  Valid values:

  - `ATOMS` Plane defined by the position of 3 atoms

  - `VECTOR` Plane defined by a fixed normal vector

  Specify how the plane is defined: either by 3 atoms or by a fixed normal vector. At least one plane must be defined through atoms. [Edit on GitHub]

NORMAL_VECTOR: real[3]

  Usage: NORMAL_VECTOR 0.0 1.0 0.0

  Alternatively to 3 atoms/points one can define one of the two, planes by defining its NORMAL vector. [Edit on GitHub]