In other words, although the last and first points are identical, they must be specified and counted twice. Each has some reasonable default value but can be changed to affect the accuracy of some part of the rendering. You can get the current value of any of these properties with a call to the getnurbsproperty subroutine. For maximum generality, express the value of a property in floating point. The values of the properties are global to a process, and each call to the setnurbsproperty subroutine changes this global state.
Smaller values indicate more accuracy.
If TRUE, performs additional error checking.