.. auto-generated by script ../../../../utils/nxdl2rst.py from the NXDL source NXcg_unit_normal_set.nxdl.xml

.. index::
    ! NXcg_unit_normal_set (base class)
    ! cg_unit_normal_set (base class)
    see: cg_unit_normal_set (base class); NXcg_unit_normal_set

.. _NXcg_unit_normal_set:

====================
NXcg_unit_normal_set
====================

**Status**:

  base class, extends :ref:`NXobject`

**Description**:

  Computational geometry description of a set of (oriented) unit normal vectors.

**Symbols**:

  The symbols used in the schema to specify e.g. dimensions of arrays.

  **d**: The dimensionality, which has to be at least 2.

  **c**: The cardinality of the set, i.e. the number of unit normals.

**Groups cited**:
  none

**Structure**:

  .. _/NXcg_unit_normal_set/dimensionality-field:

  .. index:: dimensionality (field)

  **dimensionality**: (optional) :ref:`NX_POSINT <NX_POSINT>` {units=\ :ref:`NX_UNITLESS <NX_UNITLESS>`}


  .. _/NXcg_unit_normal_set/cardinality-field:

  .. index:: cardinality (field)

  **cardinality**: (optional) :ref:`NX_POSINT <NX_POSINT>` {units=\ :ref:`NX_UNITLESS <NX_UNITLESS>`}


  .. _/NXcg_unit_normal_set/normals-field:

  .. index:: normals (field)

  **normals**: (optional) :ref:`NX_FLOAT <NX_FLOAT>` (Rank: 2, Dimensions: [c, d]) {units=\ :ref:`NX_LENGTH <NX_LENGTH>`}

    Direction of each normal

  .. _/NXcg_unit_normal_set/orientation-field:

  .. index:: orientation (field)

  **orientation**: (optional) :ref:`NX_INT <NX_INT>` (Rank: 1, Dimensions: [c]) {units=\ :ref:`NX_UNITLESS <NX_UNITLESS>`}

    Qualifier how which specifically oriented normal to its primitive each
    normal represents.

    * 0 - undefined
    * 1 - outer
    * 2 - inner


Hypertext Anchors
-----------------

List of hypertext anchors for all groups, fields,
attributes, and links defined in this class.


* :ref:`/NXcg_unit_normal_set/cardinality-field </NXcg_unit_normal_set/cardinality-field>`
* :ref:`/NXcg_unit_normal_set/dimensionality-field </NXcg_unit_normal_set/dimensionality-field>`
* :ref:`/NXcg_unit_normal_set/normals-field </NXcg_unit_normal_set/normals-field>`
* :ref:`/NXcg_unit_normal_set/orientation-field </NXcg_unit_normal_set/orientation-field>`

**NXDL Source**:
  https://github.com/nexusformat/definitions/blob/main/base_classes/NXcg_unit_normal_set.nxdl.xml