1.Modify Program 12.1 by changing the layout specifier in the evaluation shader from equal_spacing to fractional_even_spacing, as shown in Section 12.4. Observe the effect on the generated mesh. 2....

1.Modify Program 12.1 by changing the layout specifier in the evaluation shader from equal_spacing to fractional_even_spacing, as shown in Section

12.4. Observe the effect on the generated mesh. 2. Test Program 12.5 with the layout specifier in the evaluation shader set to equal_spacing, and then to fractional_even_spacing, as described in Section 12.4. Observe the effects on the rendered surface as the camera moves. You should

be able to observe popping artifacts in the first case, which are mostly alleviated in the second case.