# Build CoordSys (Points) (G Dataflow)

Builds a reference for any arbitrary coordinate system with respect to the image plane.

The reference of the coordinate system is specified as the position of the origin of the coordinate system, the orientation of its x-axis with respect to that of the image plane, and the direction of the axis.

## reference points

Array of point clusters that define the coordinate system.

If two points are specified, these points are assumed to lie along the x-axis of the coordinate system and the first point is used as the origin of the coordinate axis, as shown in the following figure.

If three points are specified, the first two points are assumed to be along the x-axis, and the third point is assumed to be on the y-axis of the coordinate system, as shown in the following figure.

## axis reference

Direction of the coordinate system.

The axis reference can be direct or indirect.

## error in

Error conditions that occur before this node runs.

The node responds to this input according to standard error behavior.

Standard Error Behavior

Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.

error in does not contain an error error in contains an error
If no error occurred before the node runs, the node begins execution normally.

If no error occurs while the node runs, it returns no error. If an error does occur while the node runs, it returns that error information as error out.

If an error occurred before the node runs, the node does not execute. Instead, it returns the error in value as error out.

Default: No error

## coordinate system

Coordinate system defined by reference points and the axis reference.

### origin

Point cluster that specifies the origin of the base reference coordinate system.

### angle (deg)

Angle the base reference coordinate system makes with the image coordinate system.

### axis reference

Orientation of the axis.

## error out

Error information.

The node produces this output according to standard error behavior.

Standard Error Behavior

Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.

error in does not contain an error error in contains an error
If no error occurred before the node runs, the node begins execution normally.

If no error occurs while the node runs, it returns no error. If an error does occur while the node runs, it returns that error information as error out.

If an error occurred before the node runs, the node does not execute. Instead, it returns the error in value as error out.

Where This Node Can Run:

Desktop OS: Windows

FPGA: Not supported

Web Server: Not supported in VIs that run in a web application