# Local Coordinate System

To create a Local Coordinate System in the Main Menu select New Entity - > Basic - > Local Coordinate System

There are three algorithms to choose from.

Firstly, you can define the values of X, Y, and Z coordinates of origin and the directions of X and Y axes directly in the menu.

TUI command: geompy.MakeMarker(OX, OY, OZ, XDX, XDY, XDZ, YDX, YDY, YDZ), where OX, OY, OZ are coordinates of the origin of LCS, XDX, XDY, XDZ is a vector of OX direction of the LCS and YDX, YDY, YDZ is a a vector of OY direction of the LCS.

Arguments: Name + Coordinates of origin, X axis direction, Y axis direction.

Secondly, you can simply select any object in the object browser or 3D viewer, in this case the coordinates of origin and axes direction of the LCS are calculated automatically basing on the selected object.

Arguments: Name + reference object.

The last algorithm of LCS construction allows to define the coordinates of origin by a point and axes directions by a line or a vector.

Arguments: Name + 1 point of origin + X axis direction, Y axis direction.

Press «OK» or «Apply» button to create an LCS at the location with the specified coordinates. The new object is shown in the Object Browser and in 3D viewer.

Example: