20.453146 a differ between a z valu czf 
31.011272 ze in a view volum in a viewpo
0.52024466 z in a screen coordin system
35.403275 ye
51.375523 the z valu czf
18.730202 the z valu czb at the rear cli
44.319332 the view volum
64.503555 the rear clip plane
32.465816 the differ between the z valu 
35.453335 plane posit
31.955635 perspect transform of three di
86.57478 data xe
2.414405 data x
14.710336 data bit of the z
15.305454 czf/ze
43.517494 a z valu czb at the rear clip 
97.936516 a z buffer method in accord wi
72.93994 a rear clip plane
0.27502787 a hidden surfac remov oper
10.554616 a front
