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Get Meter Arc Points (Get Meter Arc Points (Points)) (G Dataflow)

Last Modified: June 25, 2019

Calibrates the meter or gauge using three points on the meter: the base of the needle, the tip of the needle at its initial position, and the tip of the needle at its full-scale position.

It calculates the position of the points along the arc covered by the tip of the needle. Use this node with meters or gauges equipped with a dark needle on a light background or with a light needle on a dark background.

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image in

Reference to the source image.

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needle base

Cluster containing the coordinates of the base of the needle.

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initial point

Point cluster containing the coordinates of the tip of the needle in its initial position.

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range point

Point cluster containing the coordinates of the tip of the needle in its full-scale position.

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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

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image out

Reference to image in.

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center

Point cluster containing the coordinates of the rotation center of the needle.

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arc points

Array of point clusters containing the coordinates of the points along the arc traced by the tip of the needle.

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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


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