The referee's crease is a semi-circle on the "bottom" of the boards (in TV view), centered on the line y = 0 (the center of the center line). This feature corresponds to the section of the field it encloses
lacrosse_referee_crease_fill(referee_crease_radius = 0, line_thickness = 0)
A data frame of the bounding coordinates of the referee's crease's enclosed area
The radius of the referee's crease
The thickness with which to draw the referee's crease