volleyball_free_zone()
for reference)The service zone marks are the lines beyond the end lines that denote where a
legal serve must take place. These appear as four hash marks that are out of
bounds of the court, but contained within the free zone (see
volleyball_free_zone()
for reference)
volleyball_service_zone_mark(service_zone_mark_length = 0, line_thickness = 0)
A data frame containing the bounding box of the service zone mark
The distance the service zone mark extends away from the outer edge of the end line
The thickness of the service zone marks