Appendix C: Programmer’s Guide 963
Y1-VS-Y2 2
T-VS-Y' 3
Y-VS-Y' 4
Y1-VS-Y2' 5
Y1'-VS-Y2' 6
XR Style 11
WIRE FRAME 1
HIDDEN SRUFACE 2
CONTOUR LEVELS 3
WIRE AND CONTOUR 4
IMPLICIT PLOT 5