11 |
|
#include "paths.h" |
12 |
|
#include "otypes.h" |
13 |
|
#include "func.h" |
14 |
+ |
#include <ctype.h> |
15 |
|
|
16 |
|
|
17 |
|
#define INITFILE "rayinit.cal" |
37 |
|
|
38 |
|
|
39 |
|
void |
40 |
< |
initfunc() /* initialize function evaluation */ |
40 |
> |
initfunc(void) /* initialize function evaluation */ |
41 |
|
{ |
42 |
|
if (!rayinitcal[0]) /* already done? */ |
43 |
|
return; |
63 |
|
} |
64 |
|
|
65 |
|
|
66 |
+ |
/* Set parameters for current evaluation */ |
67 |
+ |
void |
68 |
+ |
set_eparams(char *prms) |
69 |
+ |
{ |
70 |
+ |
static char *last_params = NULL; |
71 |
+ |
char vname[RMAXWORD]; |
72 |
+ |
double value; |
73 |
+ |
char *cpd; |
74 |
+ |
/* check if already set */ |
75 |
+ |
if (prms == NULL || !*prms) |
76 |
+ |
return; |
77 |
+ |
if (prms == last_params || (last_params != NULL && |
78 |
+ |
!strcmp(prms, last_params))) |
79 |
+ |
return; |
80 |
+ |
last_params = prms; /* XXX assumes static string */ |
81 |
+ |
/* assign each variable */ |
82 |
+ |
while (*prms) { |
83 |
+ |
if (isspace(*prms)) { |
84 |
+ |
++prms; continue; |
85 |
+ |
} |
86 |
+ |
if (!isalpha(*prms)) |
87 |
+ |
goto bad_params; |
88 |
+ |
cpd = vname; |
89 |
+ |
while (*prms && (*prms != '=') & !isspace(*prms)) { |
90 |
+ |
if (!isid(*prms) | (cpd-vname >= RMAXWORD-1)) |
91 |
+ |
goto bad_params; |
92 |
+ |
*cpd++ = *prms++; |
93 |
+ |
} |
94 |
+ |
*cpd = '\0'; |
95 |
+ |
while (isspace(*prms)) prms++; |
96 |
+ |
if (*prms++ != '=') |
97 |
+ |
goto bad_params; |
98 |
+ |
value = atof(prms); |
99 |
+ |
if ((prms = fskip(prms)) == NULL) |
100 |
+ |
goto bad_params; |
101 |
+ |
while (isspace(*prms)) prms++; |
102 |
+ |
prms += (*prms == ',') | (*prms == ';') | (*prms == ':'); |
103 |
+ |
varset(vname, '=', value); |
104 |
+ |
} |
105 |
+ |
eclock++; /* notify expression evaluator */ |
106 |
+ |
return; |
107 |
+ |
bad_params: |
108 |
+ |
sprintf(errmsg, "bad parameter list '%s'", last_params); |
109 |
+ |
error(USER, errmsg); |
110 |
+ |
} |
111 |
+ |
|
112 |
+ |
|
113 |
|
MFUNC * |
114 |
|
getfunc( /* get function for this modifier */ |
115 |
|
OBJREC *m, |
261 |
|
) |
262 |
|
{ |
263 |
|
static RNUMBER lastrno = ~0; |
264 |
+ |
|
265 |
+ |
if (rayinitcal[0]) /* initialize on first call */ |
266 |
+ |
initfunc(); |
267 |
|
/* set evaluator context */ |
268 |
|
setcontext(ctx); |
269 |
|
/* check if ray already set */ |
287 |
|
|
288 |
|
if ((ffname = getpath(fname, getrlibpath(), R_OK)) == NULL) { |
289 |
|
sprintf(errmsg, "cannot find function file \"%s\"", fname); |
290 |
< |
error(USER, errmsg); |
290 |
> |
error(SYSTEM, errmsg); |
291 |
|
} |
292 |
|
fcompile(ffname); |
293 |
|
} |
299 |
|
int n; |
300 |
|
|
301 |
|
if (fobj == NULL) |
302 |
< |
error(USER, "arg(n) called without a context"); |
302 |
> |
error(USER, |
303 |
> |
"bad call to arg(n) - illegal constant in .cal file?"); |
304 |
|
|
305 |
|
n = argument(1) + .5; /* round to integer */ |
306 |
|
|
354 |
|
fray->ron[2]*funcxf.xfm[2][n-3] ) |
355 |
|
/ funcxf.sca ); |
356 |
|
|
357 |
< |
if (n <= 8) /* intersection */ |
357 |
> |
if (n <= 8) { /* intersection point */ |
358 |
> |
if (fray->rot >= FHUGE*.99) |
359 |
> |
return(0.0); /* XXX should be runtime error? */ |
360 |
|
|
361 |
|
return( fray->rop[0]*funcxf.xfm[0][n-6] + |
362 |
|
fray->rop[1]*funcxf.xfm[1][n-6] + |
363 |
|
fray->rop[2]*funcxf.xfm[2][n-6] + |
364 |
|
funcxf.xfm[3][n-6] ); |
365 |
+ |
} |
366 |
|
|
367 |
|
if (n == 9) /* total distance */ |
368 |
|
return(raydist(fray,PRIMARY) * funcxf.sca); |