AutoCAD 2008 User's
Guide > Create and Modify
Objects > Use Precision
Tools > Combine or Offset
Points and Coordinates >

Combine Coordinate Values (Coordinate Filters)

You can use coordinate filters to extract one coordinate value at a time from locations on existing objects.

*X* value from one location, the *Y*
value of a second location, and, for 3D coordinates, the *Z* value of a third location. When used with object
snaps, coordinate filters extract coordinate values from an
existing object.

*XY* plane of the UCS.

*X*, *Y*, and
*Z*. The next entry is limited to a specific
coordinate value.

Example: Use of Coordinate Filters in 2D

*X,Y*
coordinates from the midpoints of the plate's horizontal and
vertical line segments.

Here is the command prompt sequence:

Command: *circle*

Specify center point for circle or
[3P/2P/Ttr (tangent tangent radius)]: .*x*

of: *mid*

of: *Select the horizontal
line on the lower edge of the holding plate*

of: (need YZ): *mid*

of: *Select the vertical
line on the left side of the holding plate*

of: Diameter/<Radius> *Specify the radius of the hole*

Coordinate filters work only when the program prompts you for a point. If you try to use a coordinate filter at the Command prompt, you see an error message.

Example: Use of Coordinate Filters in 3D

*X* value of the new point is
extracted from the first location specified, the *Y* value from the second location, and the *Z* value from the third. The three values are combined
to form the coordinate values of the new point.

Command: *point*

Point: *.x*

of mid

of select object (*1*)

(need YZ): *.y*

*of mid*

of select object (*2)*

(need Z): *mid*

of select object (*3)*