Constructs a cap with the given center and radius. A negative radius yields an empty cap; a radius of 180 degrees or more yields a full cap (containing the entire sphere). "center" should be unit length.
the center point
the radius
the data
Constructs a cap with the given center and radius. A negative radius yields an empty cap; a radius of 180 degrees or more yields a full cap (containing the entire sphere). "center" should be unit length.