### [FIDUCIALS]

The FIDUCIALS section is intended to allow a user to define geometries for aligning the package with equipment that processes it -- these alignment targets are known as fiducials.

### Basic Syntax

```[FIDUCIAL]
NAME=X,Y  SQUARE  DIMENSION
NAME=X,Y  POLYGON NUM_OF_POLYS WIDTH NUM_OF_VERTICES X,Y X,Y ...

```

NAME - A user defined name for the fiducial. No spaces or special characters.

X,Y - The center coordinates or reference point (if a polygon this point acts as the reference for the vertices that follow.)

SQUARE - If the fiducial is a simple square shape use the keyword square.

DIMENSION - for a square fiducial, this is the length of an edge.

POLYGON - more complex fiducials can be described using the polygon format.

NUM_OF_POLYGONS - the number of polygons that comprise this fiducial. Generally if more than one, the additional polygons are cutouts.

WIDTH - for a polygon, the width of the edge. Normally = 0.

NUM_OF_VERTICES - the number of vertices to follow. (Note, first and last vertex must be explicitly stated so a "square" has 5 vertices.) If this number is negative, it indicates that the polygon is a "cutout."

X,Y - for a polygon the vertex coordinates are with respect to the reference coordinate - they are not absolute. Also the first vertex must be the same as the last to close the polygon.

### Examples

The following fiducial data produces the image shown below:

```F1=4500,4500 SQUARE 350
F2=-4500,4500 SQUARE 350
F3=-4500,-4500 SQUARE 350
F4=4500,-4500 POLYGON 1 0 13
25,25 175,25 175,-25
25,-25 25,-175 -25,-175
-25,-25 -175,-25 -175,25
-25,25 -25,175 25,175
25,25

```

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