Centroid
If you select centroid as the reference point for a table-driven or
sketch-driven pattern, the system determines the centroid based on the
type of seed feature.
For cylindrical, conical, or revolved features,
the centroid is the intersection of the axis of revolution with the X-Y
plane of the pattern.
If the sketch consists of lines and arcs, such
as rectangles or oval shapes, and if the sketch plane is parallel to the
X-Y plane, the centroid is defined as the centroid of the sketch.
For any other condition, the centroid is the centroid
of the face of the seed feature.
If there is more than one seed feature, the centroid
of the first seed feature is used.
If the seed feature is generated from a sketch
that includes multiple contours, the centroid of the largest closed contour
is used.