plotcolors

linux环境下开发

5      receivers 
5      sources 
0      well color 
5      rays that don't intersect well  (7/30/91 this option turned off)
2      rays that hit well 
4      interfaces 



key:  (CWP's xgraph colors)
0      black
1      white 
2      red
3      green
4      dark blue
5      light blue
6      violet
7      yellow