1 |
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/* Copyright (c) 1991 Regents of the University of California */ |
2 |
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|
1 |
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#ifndef lint |
2 |
< |
static char SCCSid[] = "$SunId$ LBL"; |
2 |
> |
static const char RCSid[] = "$Id$"; |
3 |
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#endif |
6 |
– |
|
4 |
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/* |
5 |
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* func.c - interface to calcomp functions. |
9 |
– |
* |
10 |
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* 4/7/86 |
6 |
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*/ |
7 |
|
|
8 |
< |
#include "ray.h" |
8 |
> |
#include "copyright.h" |
9 |
|
|
10 |
+ |
#include <math.h> |
11 |
+ |
|
12 |
+ |
#include "ray.h" |
13 |
+ |
#include "paths.h" |
14 |
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#include "otypes.h" |
15 |
+ |
#include "func.h" |
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|
17 |
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|
18 |
+ |
#define INITFILE "rayinit.cal" |
19 |
+ |
#define CALSUF ".cal" |
20 |
+ |
#define LCALSUF 4 |
21 |
+ |
char REFVNAME[] = "`FILE_REFCNT"; |
22 |
+ |
|
23 |
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XF unitxf = { /* identity transform */ |
24 |
< |
1.0, 0.0, 0.0, 0.0, |
25 |
< |
0.0, 1.0, 0.0, 0.0, |
26 |
< |
0.0, 0.0, 1.0, 0.0, |
27 |
< |
0.0, 0.0, 0.0, 1.0, |
24 |
> |
{{1.0, 0.0, 0.0, 0.0}, |
25 |
> |
{0.0, 1.0, 0.0, 0.0}, |
26 |
> |
{0.0, 0.0, 1.0, 0.0}, |
27 |
> |
{0.0, 0.0, 0.0, 1.0}}, |
28 |
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1.0 |
29 |
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}; |
30 |
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|
32 |
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static OBJREC *fobj = NULL; /* current function object */ |
33 |
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static RAY *fray = NULL; /* current function ray */ |
34 |
|
|
35 |
+ |
static double l_erf(char *), l_erfc(char *), l_arg(char *); |
36 |
|
|
37 |
< |
setmap(m, r, bx) /* set channels for function call */ |
38 |
< |
OBJREC *m; |
39 |
< |
register RAY *r; |
40 |
< |
XF *bx; |
37 |
> |
|
38 |
> |
extern MFUNC * |
39 |
> |
getfunc( /* get function for this modifier */ |
40 |
> |
OBJREC *m, |
41 |
> |
int ff, |
42 |
> |
unsigned int ef, |
43 |
> |
int dofwd |
44 |
> |
) |
45 |
|
{ |
46 |
< |
extern double l_arg(), l_erf(), l_erfc(); |
47 |
< |
extern long eclock; |
48 |
< |
static char *initfile = "rayinit.cal"; |
49 |
< |
static long lastrno = -1; |
50 |
< |
/* check to see if already set */ |
51 |
< |
if (m == fobj && r->rno == lastrno) |
52 |
< |
return(0); |
53 |
< |
/* initialize if first call */ |
54 |
< |
if (initfile != NULL) { |
55 |
< |
loadfunc(initfile); |
46 |
> |
static char initfile[] = INITFILE; |
47 |
> |
char sbuf[MAXSTR]; |
48 |
> |
register char **arg; |
49 |
> |
register MFUNC *f; |
50 |
> |
int ne, na; |
51 |
> |
register int i; |
52 |
> |
/* check to see if done already */ |
53 |
> |
if ((f = (MFUNC *)m->os) != NULL) |
54 |
> |
return(f); |
55 |
> |
fobj = NULL; fray = NULL; |
56 |
> |
if (initfile[0]) { /* initialize on first call */ |
57 |
> |
esupport |= E_VARIABLE|E_FUNCTION|E_INCHAN|E_RCONST|E_REDEFW; |
58 |
> |
esupport &= ~(E_OUTCHAN); |
59 |
> |
setcontext(""); |
60 |
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scompile("Dx=$1;Dy=$2;Dz=$3;", NULL, 0); |
61 |
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scompile("Nx=$4;Ny=$5;Nz=$6;", NULL, 0); |
62 |
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scompile("Px=$7;Py=$8;Pz=$9;", NULL, 0); |
63 |
< |
scompile("T=$10;Rdot=$11;", NULL, 0); |
63 |
> |
scompile("T=$10;Ts=$25;Rdot=$11;", NULL, 0); |
64 |
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scompile("S=$12;Tx=$13;Ty=$14;Tz=$15;", NULL, 0); |
65 |
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scompile("Ix=$16;Iy=$17;Iz=$18;", NULL, 0); |
66 |
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scompile("Jx=$19;Jy=$20;Jz=$21;", NULL, 0); |
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scompile("Kx=$22;Ky=$23;Kz=$24;", NULL, 0); |
68 |
+ |
scompile("Lu=$26;Lv=$27;", NULL, 0); |
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funset("arg", 1, '=', l_arg); |
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funset("erf", 1, ':', l_erf); |
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funset("erfc", 1, ':', l_erfc); |
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setnoisefuncs(); |
73 |
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initfile = NULL; |
73 |
> |
setprismfuncs(); |
74 |
> |
loadfunc(initfile); |
75 |
> |
initfile[0] = '\0'; |
76 |
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} |
77 |
+ |
if ((na = m->oargs.nsargs) <= ff) |
78 |
+ |
goto toofew; |
79 |
+ |
arg = m->oargs.sarg; |
80 |
+ |
if ((f = (MFUNC *)calloc(1, sizeof(MFUNC))) == NULL) |
81 |
+ |
goto memerr; |
82 |
+ |
i = strlen(arg[ff]); /* set up context */ |
83 |
+ |
if (i == 1 && arg[ff][0] == '.') |
84 |
+ |
setcontext(f->ctx = ""); /* "." means no file */ |
85 |
+ |
else { |
86 |
+ |
strcpy(sbuf,arg[ff]); /* file name is context */ |
87 |
+ |
if (i > LCALSUF && !strcmp(sbuf+i-LCALSUF, CALSUF)) |
88 |
+ |
sbuf[i-LCALSUF] = '\0'; /* remove suffix */ |
89 |
+ |
setcontext(f->ctx = savestr(sbuf)); |
90 |
+ |
if (!vardefined(REFVNAME)) { /* file loaded? */ |
91 |
+ |
loadfunc(arg[ff]); |
92 |
+ |
varset(REFVNAME, '=', 1.0); |
93 |
+ |
} else /* reference_count++ */ |
94 |
+ |
varset(REFVNAME, '=', varvalue(REFVNAME)+1.0); |
95 |
+ |
} |
96 |
+ |
curfunc = NULL; /* parse expressions */ |
97 |
+ |
sprintf(sbuf, "%s \"%s\"", ofun[m->otype].funame, m->oname); |
98 |
+ |
for (i=0, ne=0; ef && i < na; i++, ef>>=1) |
99 |
+ |
if (ef & 1) { /* flagged as an expression? */ |
100 |
+ |
if (ne >= MAXEXPR) |
101 |
+ |
objerror(m, INTERNAL, "too many expressions"); |
102 |
+ |
initstr(arg[i], sbuf, 0); |
103 |
+ |
f->ep[ne++] = getE1(); |
104 |
+ |
if (nextc != EOF) |
105 |
+ |
syntax("unexpected character"); |
106 |
+ |
} |
107 |
+ |
if (ef) |
108 |
+ |
goto toofew; |
109 |
+ |
if (i <= ff) /* find transform args */ |
110 |
+ |
i = ff+1; |
111 |
+ |
while (i < na && arg[i][0] != '-') |
112 |
+ |
i++; |
113 |
+ |
if (i == na) /* no transform */ |
114 |
+ |
f->f = f->b = &unitxf; |
115 |
+ |
else { /* get transform */ |
116 |
+ |
if ((f->b = (XF *)malloc(sizeof(XF))) == NULL) |
117 |
+ |
goto memerr; |
118 |
+ |
if (invxf(f->b, na-i, arg+i) != na-i) |
119 |
+ |
objerror(m, USER, "bad transform"); |
120 |
+ |
if (f->b->sca < 0.0) |
121 |
+ |
f->b->sca = -f->b->sca; |
122 |
+ |
if (dofwd) { /* do both transforms */ |
123 |
+ |
if ((f->f = (XF *)malloc(sizeof(XF))) == NULL) |
124 |
+ |
goto memerr; |
125 |
+ |
xf(f->f, na-i, arg+i); |
126 |
+ |
if (f->f->sca < 0.0) |
127 |
+ |
f->f->sca = -f->f->sca; |
128 |
+ |
} |
129 |
+ |
} |
130 |
+ |
m->os = (char *)f; |
131 |
+ |
return(f); |
132 |
+ |
toofew: |
133 |
+ |
objerror(m, USER, "too few string arguments"); |
134 |
+ |
memerr: |
135 |
+ |
error(SYSTEM, "out of memory in getfunc"); |
136 |
+ |
return NULL; /* pro forma return */ |
137 |
+ |
} |
138 |
+ |
|
139 |
+ |
|
140 |
+ |
extern void |
141 |
+ |
freefunc( /* free memory associated with modifier */ |
142 |
+ |
OBJREC *m |
143 |
+ |
) |
144 |
+ |
{ |
145 |
+ |
register MFUNC *f; |
146 |
+ |
register int i; |
147 |
+ |
|
148 |
+ |
if ((f = (MFUNC *)m->os) == NULL) |
149 |
+ |
return; |
150 |
+ |
for (i = 0; f->ep[i] != NULL; i++) |
151 |
+ |
epfree(f->ep[i]); |
152 |
+ |
if (f->ctx[0]) { /* done with definitions */ |
153 |
+ |
setcontext(f->ctx); |
154 |
+ |
i = varvalue(REFVNAME)-.5; /* reference_count-- */ |
155 |
+ |
if (i > 0) |
156 |
+ |
varset(REFVNAME, '=', (double)i); |
157 |
+ |
else |
158 |
+ |
dcleanup(2); /* remove definitions */ |
159 |
+ |
freestr(f->ctx); |
160 |
+ |
} |
161 |
+ |
if (f->b != &unitxf) |
162 |
+ |
free((void *)f->b); |
163 |
+ |
if (f->f != NULL && f->f != &unitxf) |
164 |
+ |
free((void *)f->f); |
165 |
+ |
free((void *)f); |
166 |
+ |
m->os = NULL; |
167 |
+ |
} |
168 |
+ |
|
169 |
+ |
|
170 |
+ |
extern int |
171 |
+ |
setfunc( /* set channels for function call */ |
172 |
+ |
OBJREC *m, |
173 |
+ |
register RAY *r |
174 |
+ |
) |
175 |
+ |
{ |
176 |
+ |
static unsigned long lastrno = ~0; |
177 |
+ |
register MFUNC *f; |
178 |
+ |
/* get function */ |
179 |
+ |
if ((f = (MFUNC *)m->os) == NULL) |
180 |
+ |
objerror(m, CONSISTENCY, "setfunc called before getfunc"); |
181 |
+ |
/* set evaluator context */ |
182 |
+ |
setcontext(f->ctx); |
183 |
+ |
/* check to see if matrix set */ |
184 |
+ |
if (m == fobj && r->rno == lastrno) |
185 |
+ |
return(0); |
186 |
|
fobj = m; |
187 |
|
fray = r; |
188 |
|
if (r->rox != NULL) |
189 |
< |
if (bx != &unitxf) { |
190 |
< |
funcxf.sca = r->rox->b.sca * bx->sca; |
191 |
< |
multmat4(funcxf.xfm, r->rox->b.xfm, bx->xfm); |
189 |
> |
if (f->b != &unitxf) { |
190 |
> |
funcxf.sca = r->rox->b.sca * f->b->sca; |
191 |
> |
multmat4(funcxf.xfm, r->rox->b.xfm, f->b->xfm); |
192 |
|
} else |
193 |
< |
copystruct(&funcxf, &r->rox->b); |
193 |
> |
funcxf = r->rox->b; |
194 |
|
else |
195 |
< |
copystruct(&funcxf, bx); |
195 |
> |
funcxf = *(f->b); |
196 |
|
lastrno = r->rno; |
197 |
|
eclock++; /* notify expression evaluator */ |
198 |
|
return(1); |
199 |
|
} |
200 |
|
|
201 |
|
|
202 |
< |
setfunc(m, r) /* simplified interface to setmap */ |
203 |
< |
register OBJREC *m; |
204 |
< |
RAY *r; |
202 |
> |
extern void |
203 |
> |
loadfunc( /* load definition file */ |
204 |
> |
char *fname |
205 |
> |
) |
206 |
|
{ |
80 |
– |
register XF *mxf; |
81 |
– |
|
82 |
– |
if ((mxf = (XF *)m->os) == NULL) { |
83 |
– |
register int n; |
84 |
– |
register char **sa; |
85 |
– |
|
86 |
– |
for (n = m->oargs.nsargs, sa = m->oargs.sarg; |
87 |
– |
n > 0 && **sa != '-'; n--, sa++) |
88 |
– |
; |
89 |
– |
if (n == 0) |
90 |
– |
mxf = &unitxf; |
91 |
– |
else { |
92 |
– |
mxf = (XF *)malloc(sizeof(XF)); |
93 |
– |
if (mxf == NULL) |
94 |
– |
goto memerr; |
95 |
– |
if (invxf(mxf, n, sa) != n) |
96 |
– |
objerror(m, USER, "bad transform"); |
97 |
– |
if (mxf->sca < 0.0) |
98 |
– |
mxf->sca = -mxf->sca; |
99 |
– |
} |
100 |
– |
m->os = (char *)mxf; |
101 |
– |
} |
102 |
– |
return(setmap(m, r, mxf)); |
103 |
– |
memerr: |
104 |
– |
error(SYSTEM, "out of memory in setfunc"); |
105 |
– |
} |
106 |
– |
|
107 |
– |
|
108 |
– |
loadfunc(fname) /* load definition file */ |
109 |
– |
char *fname; |
110 |
– |
{ |
111 |
– |
extern char *libpath; /* library search path */ |
207 |
|
char *ffname; |
208 |
|
|
209 |
< |
if ((ffname = getpath(fname, libpath, R_OK)) == NULL) { |
209 |
> |
if ((ffname = getpath(fname, getrlibpath(), R_OK)) == NULL) { |
210 |
|
sprintf(errmsg, "cannot find function file \"%s\"", fname); |
211 |
|
error(USER, errmsg); |
212 |
|
} |
214 |
|
} |
215 |
|
|
216 |
|
|
217 |
< |
double |
218 |
< |
l_arg() /* return nth real argument */ |
217 |
> |
static double |
218 |
> |
l_arg(char *nm) /* return nth real argument */ |
219 |
|
{ |
125 |
– |
extern double argument(); |
220 |
|
register int n; |
221 |
|
|
222 |
+ |
if (fobj == NULL) |
223 |
+ |
syntax("arg(n) used in constant expression"); |
224 |
+ |
|
225 |
|
n = argument(1) + .5; /* round to integer */ |
226 |
|
|
227 |
|
if (n < 1) |
235 |
|
} |
236 |
|
|
237 |
|
|
238 |
< |
double |
239 |
< |
l_erf() /* error function */ |
238 |
> |
static double |
239 |
> |
l_erf(char *nm) /* error function */ |
240 |
|
{ |
144 |
– |
extern double erf(); |
145 |
– |
|
241 |
|
return(erf(argument(1))); |
242 |
|
} |
243 |
|
|
244 |
|
|
245 |
< |
double |
246 |
< |
l_erfc() /* cumulative error function */ |
245 |
> |
static double |
246 |
> |
l_erfc(char *nm) /* cumulative error function */ |
247 |
|
{ |
153 |
– |
extern double erfc(); |
154 |
– |
|
248 |
|
return(erfc(argument(1))); |
249 |
|
} |
250 |
|
|
251 |
|
|
252 |
< |
double |
253 |
< |
chanvalue(n) /* return channel n to calcomp */ |
254 |
< |
register int n; |
252 |
> |
extern double |
253 |
> |
chanvalue( /* return channel n to calcomp */ |
254 |
> |
register int n |
255 |
> |
) |
256 |
|
{ |
257 |
< |
double sum; |
258 |
< |
register RAY *r; |
257 |
> |
if (fray == NULL) |
258 |
> |
syntax("ray parameter used in constant expression"); |
259 |
|
|
260 |
|
if (--n < 0) |
261 |
|
goto badchan; |
262 |
|
|
263 |
< |
if (n < 3) /* ray direction */ |
263 |
> |
if (n <= 2) /* ray direction */ |
264 |
|
|
265 |
|
return( ( fray->rdir[0]*funcxf.xfm[0][n] + |
266 |
|
fray->rdir[1]*funcxf.xfm[1][n] + |
267 |
|
fray->rdir[2]*funcxf.xfm[2][n] ) |
268 |
|
/ funcxf.sca ); |
269 |
|
|
270 |
< |
if (n < 6) /* surface normal */ |
270 |
> |
if (n <= 5) /* surface normal */ |
271 |
|
|
272 |
|
return( ( fray->ron[0]*funcxf.xfm[0][n-3] + |
273 |
|
fray->ron[1]*funcxf.xfm[1][n-3] + |
274 |
|
fray->ron[2]*funcxf.xfm[2][n-3] ) |
275 |
|
/ funcxf.sca ); |
276 |
|
|
277 |
< |
if (n < 9) /* intersection */ |
277 |
> |
if (n <= 8) /* intersection */ |
278 |
|
|
279 |
|
return( fray->rop[0]*funcxf.xfm[0][n-6] + |
280 |
|
fray->rop[1]*funcxf.xfm[1][n-6] + |
281 |
|
fray->rop[2]*funcxf.xfm[2][n-6] + |
282 |
|
funcxf.xfm[3][n-6] ); |
283 |
|
|
284 |
< |
if (n == 9) { /* distance */ |
284 |
> |
if (n == 9) /* total distance */ |
285 |
> |
return(raydist(fray,PRIMARY) * funcxf.sca); |
286 |
|
|
192 |
– |
sum = fray->rot; |
193 |
– |
for (r = fray->parent; r != NULL; r = r->parent) |
194 |
– |
sum += r->rot; |
195 |
– |
return(sum * funcxf.sca); |
196 |
– |
|
197 |
– |
} |
287 |
|
if (n == 10) /* dot product (range [-1,1]) */ |
288 |
|
return( fray->rod <= -1.0 ? -1.0 : |
289 |
|
fray->rod >= 1.0 ? 1.0 : |
292 |
|
if (n == 11) /* scale */ |
293 |
|
return(funcxf.sca); |
294 |
|
|
295 |
< |
if (n < 15) /* origin */ |
295 |
> |
if (n <= 14) /* origin */ |
296 |
|
return(funcxf.xfm[3][n-12]); |
297 |
|
|
298 |
< |
if (n < 18) /* i unit vector */ |
298 |
> |
if (n <= 17) /* i unit vector */ |
299 |
|
return(funcxf.xfm[0][n-15] / funcxf.sca); |
300 |
|
|
301 |
< |
if (n < 21) /* j unit vector */ |
302 |
< |
return(funcxf.xfm[1][n-15] / funcxf.sca); |
301 |
> |
if (n <= 20) /* j unit vector */ |
302 |
> |
return(funcxf.xfm[1][n-18] / funcxf.sca); |
303 |
|
|
304 |
< |
if (n < 24) /* k unit vector */ |
304 |
> |
if (n <= 23) /* k unit vector */ |
305 |
|
return(funcxf.xfm[2][n-21] / funcxf.sca); |
306 |
+ |
|
307 |
+ |
if (n == 24) /* single ray (shadow) distance */ |
308 |
+ |
return((fray->rot+raydist(fray->parent,SHADOW)) * funcxf.sca); |
309 |
+ |
|
310 |
+ |
if (n <= 26) /* local (u,v) coordinates */ |
311 |
+ |
return(fray->uv[n-25]); |
312 |
|
badchan: |
313 |
|
error(USER, "illegal channel number"); |
314 |
+ |
return(0.0); |
315 |
|
} |