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?? N_Cu%HP
System being written to file geo_bld.sys E8J`7sa
--- SYSTEM NEW; RESET; RAYS 0 +"6_rbeuO
0 rays defined rBa <s
--- $PLOT NORM D{I^_~-\5
--- $IO PLOT ]H0BUg
--- SYSTEM FROM GEO_BLD I
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System being read from file geo_bld.sys _C~e(/=z