雷哥,请教一下按照那个教程第四章,按下preview all 后并未出现棱镜三维图,为什么呢?? #w{`6}p
System being written to file geo_bld.sys n`5Nf
--- SYSTEM NEW; RESET; RAYS 0 g257jarkMF
0 rays defined |J&\/8Q
--- $PLOT NORM SyL"Bmi
--- $IO PLOT b<a3Ue%
--- SYSTEM FROM GEO_BLD mY 1l2
System being read from file geo_bld.sys i2qN 0?n