54 |
|
/* check to see if done already */ |
55 |
|
if ((f = (MFUNC *)m->os) != NULL) |
56 |
|
return(f); |
57 |
+ |
fobj = NULL; fray = NULL; |
58 |
|
if (initfile[0]) { /* initialize on first call */ |
59 |
|
setcontext(""); |
60 |
|
scompile("Dx=$1;Dy=$2;Dz=$3;", NULL, 0); |
212 |
|
extern double argument(); |
213 |
|
register int n; |
214 |
|
|
215 |
+ |
if (fobj == NULL) |
216 |
+ |
syntax("arg(n) used in constant expression"); |
217 |
+ |
|
218 |
|
n = argument(1) + .5; /* round to integer */ |
219 |
|
|
220 |
|
if (n < 1) |
252 |
|
{ |
253 |
|
double sum; |
254 |
|
register RAY *r; |
255 |
+ |
|
256 |
+ |
if (fray == NULL) |
257 |
+ |
syntax("ray parameter used in constant expression"); |
258 |
|
|
259 |
|
if (--n < 0) |
260 |
|
goto badchan; |