🚀 go-pugleaf

Here is my program using stencil() runing on Indigo2,Ocatne, but not on O2.
Appreciate very much Any suggestions to fix it.

----from here
void stencilmask(int eyer){
   if(eyer==0) stencil(TRUE,0x1, SF_EQUAL,   0x1, ST_KEEP, ST_KEEP,
ST_KEEP);
   else if(eyer==1) stencil(TRUE,0x1, SF_NOTEQUAL,0x1, ST_KEEP, ST_KEEP,
ST_KEEP);
}
void
cilpatdraw(){  
static   int gid2, j;
 static   long   vert1[2],vert2[2];
 static   long   xscrmax,yscrmax;

     prefposition(0.0, xscrmax, 0.0, yscrmax);
     gid2= winopen(" stencil pattern");
     ortho2( 0.0, xscrmax, 0.0, yscrmax);
     stensize(1);  sclear(0x00);     subpixel(1);
     stencil(TRUE, 1, SF_ALWAYS, 0x1, ST_REPLACE, ST_REPLACE, ST_REPLACE);
     zfunction(ZF_NEVER); cpack(0x00); clear();
     vert1[0]= 0.0;  vert2[0]= xscrmax;
     for(j= 0; j<yscrmax; j+=2){
      vert1[1]= vert2[1]= j;
      bgnline(); v2i(vert1); v2i(vert2); endline();
     }
    winclose(gid2); 
}/* end*/


David P. Gorgen <dgorgen@annarbor.engr.sgi.com> wrote in message news:8v3snp$bfu3$1@fido.engr.sgi.com...
> nospam@oddhack.engr.sgi.com (Jon Leech) writes:
> >  - Have you checked for any OpenGL errors generated during execution of
> >    the program?
> 
> Helpful hint: a really easy way to do this on SGI's is to
> 
>     > setenv GLERRORABORT anything
> 
> (or the equivalent way to set an environment varible in non-csh
> shells).
> 
> Then any time a GL error occurs, your program will abort(), and you can
> use a debugger to get a stack trace.
> 
> Note, it is a terrible idea to use this in a production environment!
> But as a diagnostic tool it's great.
> --
> David Gorgen     Principal Engineer     Silicon Graphics, Inc.
> dgorgen 'at' sgi.com                    1600 Amphitheatre Pkwy.   MS 43-2-991
> Voice:650-933-3493   Fax:650-932-3493   Mountain View, CA   94043-1351