HasPointsAttribute

Validates a points array for the shape of this annotation.

Valies that all coordinates are either int or float

Validates that the number of coordinates matches the required number for the given shape

Validates that the number of points (sequential coordinate pairs) matches the expected number of points for the given shape

Validates some edgecases where the given points don't create a valid shape

Round the floats of the points array to 2 decimals before saving.

This is a more than sufficient precision for annotation point coordinates and saves memory in the DB as well as when processing the annotations in PHP.

Counts number of distinct points