# Point in Polygon (G Dataflow)

Last Modified: June 25, 2019

Checks the position of a point in relation to a polygon.  ## x

X-coordinates of the vertices of the polygon. You must specify at least three elements in this input. ## y

Y-coordinates of the vertices of the polygon. You must specify the same number of elements in y and x. ## point x

X-coordinate of the point.

This input accepts the following data types:

• Double-precision, floating-point number
• 1D array of double-precision, floating-point numbers

Default: 0 ## point y

Y-coordinate of the point.

This input accepts the following data types:

• Double-precision, floating-point number
• 1D array of double-precision, floating-point numbers

Default: 0 ## 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 ## tolerance

Accuracy of verifying whether a point lies on the boundary.

If the value you specify in tolerance is less than 0, this node sets the value to 1E-09.

Default: 1E-09 ## position

Position of the given point relative to the polygon.

This output can return the following data types:

• Ring
• 1D array of rings
Name Value Description
Inside 0 The position of the given point is inside the polygon.
On Boundary 1 The position of the given point is on the boundary of the polygon.
Outside 2 The position of the given point is outside the polygon. ## 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