# 7.31. Local Coordinate Systems

This section is referenced in the following other sections

- Simulation Setup: Local Coordinate System

## 7.31.1. Local Coordinate System

Scope

  Sierra

Summary

  Defines the local coordinate system parameters.

Description

  This Command Block allows the definition of a coordinate system that can be used to transform values for output or field calculations. For any specific local coordinate system three pieces of information are required for completely defining a coordinate system are the origin, a coordinate axis vector and a point lying on one of the other axes. Using this information a transformation from the local coordinate system to the computational coordinate system can be determined.

    begin Local Coordinate System Coordinate_System_Name

       Origin {=} Value...

       Point {=} Value...

       Type {=} {cartesian | conical | cylindrical | spherical}

       Vector {=} Value...

    end Local Coordinate System Coordinate_System_Name

### 7.31.1.1. Line Commands

###### Origin

Syntax

  Origin {=} Value…

Summary

  Local coordinate system origin.

Description

  Specifies the point as the origin of a local coordinate system. The number of coordinates may be either 2 or 3 depending on the spatial dimension. By default, a value of is used for 2D.

Parameter | Value | Default
--- | --- | ---
{=} | {= | are | is} | –
Value | real… | –

###### Point

Syntax

  Point {=} Value…

Summary

  Local coordinate alternative point.

Description

  Declare the point that lies on an alternate axis and is in the plane subtended by the specified VECTOR and the vector defined by the point and the origin.

Parameter | Value | Default
--- | --- | ---
{=} | {= | are | is} | –
Value | real… | –

###### Type

Syntax

  Type {=} {cartesian | conical | cylindrical | spherical}

Summary

  Local coordinate system type.

Description

  This line command selects the coordinate system type.

Parameter | Value | Default
--- | --- | ---
{=} | {= | are | is} | –
CoordType | {cartesian | conical | cylindrical | spherical} | –

###### Vector

Syntax

  Vector {=} Value…

Summary

  Local coordinate axis vector.

Description

  Declare the vector that defines one of the coordinate axes. The specific usage depends on the selected coordinate system type.

Parameter | Value | Default
--- | --- | ---
{=} | {= | are | is} | –
Value | real… | –

## 7.31.2. Local Coordinate System

Syntax

  Local Coordinate System {=} Mesh Entities

Summary

  Associate coordinate system with mesh entity.

Description

  Specify the local coordinate system to be used in conjunction with given element blocks.

Parameter | Value | Default
--- | --- | ---
{=} | {= | are | is} | –
Mesh Entities | string | –