@negative=rc([-100,-50,-25],[100,50,25])
#negative:type="spans_origin"

@large=rc([1000000,2000000,3000000],[1000063,2000031,3000015])  
#large:coordinates="very_large_values"

@zero_size=rc([10,10,10],[10,10,10])
#zero_size:warning="single_point_region"

@backwards=rc([20,20,20],[10,10,10])
#backwards:note="coordinates_will_be_normalized"
