void zbuffer()
{
readshadow();
int i,j,k;
for (i = -300;i <= 300;++i)
for (j = -300;j <= 300;++j)
{
double z = 1e11;
struct point p;
struct colour c = black;
p.x = i;
p.y = j;
for (k = 0;k < pla_num;++k)
{
if (proj_list[k].plan.z != 0)
if (in_poly(&proj_list[k].proj,p))
{
struct plane pl = proj_list[k].plan;
double t = (pl.d-pl.x*i-pl.y*j)/(double)pl.z;
if (t >=0 && t < z)
{
z = t;
c = proj_list[k].c;
}
}
}
glColor3f(c.r,c.g,c.b);
glVertex2i(i,j);
}
}
int
main(int argc, char **argv)
{
const char optstr[] = ":admopstuxg:l:";
int i;
#ifdef __GLIBC__
putenv("POSIXLY_CORRECT=1");
#endif
progname = basename(argv[0]);
while ((i = getopt(argc, argv, optstr)) != EOF) {
switch (i) {
case 'a':
aflag = 1;
break;
case 'd':
dflag = 1;
break;
case 'm':
mflag = 1;
break;
case 'o':
oflag = 1;
break;
case 'p':
pflag = 1;
break;
case 's':
sflag = 1;
break;
case 't':
tflag = 1;
break;
case 'u':
uflag = 1;
break;
case 'x':
xflag = 1;
break;
case 'g':
selectgrp(optarg);
break;
case 'l':
selectuser(optarg);
break;
default:
usage();
}
}
if (argv[optind])
usage();
if (sflag && uflag)
sflag = uflag = 0;
readpasswd();
readshadow();
readgroup();
userdel();
report();
return errcnt;
}
