1 |
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/* Copyright (c) 1986 Regents of the University of California */ |
2 |
– |
|
1 |
|
#ifndef lint |
2 |
< |
static char SCCSid[] = "$SunId$ LBL"; |
2 |
> |
static const char RCSid[] = "$Id$"; |
3 |
|
#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 "copyright.h" |
9 |
+ |
|
10 |
|
#include "ray.h" |
11 |
|
|
12 |
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#include "otypes.h" |
13 |
|
|
14 |
+ |
#include "func.h" |
15 |
|
|
18 |
– |
typedef struct { |
19 |
– |
double xfm[4][4]; /* transform matrix */ |
20 |
– |
double sca; /* scalefactor */ |
21 |
– |
} XF; |
16 |
|
|
17 |
< |
static OBJREC *fobj; /* current function object */ |
18 |
< |
static RAY *fray; /* current function ray */ |
19 |
< |
static XF fxf; /* current transformation */ |
17 |
> |
#define INITFILE "rayinit.cal" |
18 |
> |
#define CALSUF ".cal" |
19 |
> |
#define LCALSUF 4 |
20 |
> |
char REFVNAME[] = "`FILE_REFCNT"; |
21 |
|
|
22 |
+ |
XF unitxf = { /* identity transform */ |
23 |
+ |
{{1.0, 0.0, 0.0, 0.0}, |
24 |
+ |
{0.0, 1.0, 0.0, 0.0}, |
25 |
+ |
{0.0, 0.0, 1.0, 0.0}, |
26 |
+ |
{0.0, 0.0, 0.0, 1.0}}, |
27 |
+ |
1.0 |
28 |
+ |
}; |
29 |
|
|
30 |
< |
setmap(m, r, xfm, sca) /* set channels for function call */ |
30 |
> |
XF funcxf; /* current transformation */ |
31 |
> |
static OBJREC *fobj = NULL; /* current function object */ |
32 |
> |
static RAY *fray = NULL; /* current function ray */ |
33 |
> |
|
34 |
> |
static double l_erf(char *), l_erfc(char *), l_arg(char *); |
35 |
> |
|
36 |
> |
|
37 |
> |
MFUNC * |
38 |
> |
getfunc(m, ff, ef, dofwd) /* get function for this modifier */ |
39 |
|
OBJREC *m; |
40 |
< |
register RAY *r; |
41 |
< |
double xfm[4][4]; |
42 |
< |
double sca; |
40 |
> |
int ff; |
41 |
> |
unsigned int ef; |
42 |
> |
int dofwd; |
43 |
|
{ |
44 |
< |
extern double l_noise3(), l_noise3a(), l_noise3b(), l_noise3c(); |
45 |
< |
extern double l_hermite(), l_fnoise3(), l_arg(); |
46 |
< |
extern long eclock; |
47 |
< |
static char *initfile = "rayinit.cal"; |
48 |
< |
|
49 |
< |
if (initfile != NULL) { |
50 |
< |
loadfunc(initfile); |
44 |
> |
static char initfile[] = INITFILE; |
45 |
> |
char sbuf[MAXSTR]; |
46 |
> |
register char **arg; |
47 |
> |
register MFUNC *f; |
48 |
> |
int ne, na; |
49 |
> |
register int i; |
50 |
> |
/* check to see if done already */ |
51 |
> |
if ((f = (MFUNC *)m->os) != NULL) |
52 |
> |
return(f); |
53 |
> |
fobj = NULL; fray = NULL; |
54 |
> |
if (initfile[0]) { /* initialize on first call */ |
55 |
> |
esupport |= E_VARIABLE|E_FUNCTION|E_INCHAN|E_RCONST|E_REDEFW; |
56 |
> |
esupport &= ~(E_OUTCHAN); |
57 |
> |
setcontext(""); |
58 |
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scompile("Dx=$1;Dy=$2;Dz=$3;", NULL, 0); |
59 |
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scompile("Nx=$4;Ny=$5;Nz=$6;", NULL, 0); |
60 |
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scompile("Px=$7;Py=$8;Pz=$9;", NULL, 0); |
61 |
< |
scompile("T=$10;Rdot=$11;", NULL, 0); |
61 |
> |
scompile("T=$10;Ts=$25;Rdot=$11;", NULL, 0); |
62 |
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scompile("S=$12;Tx=$13;Ty=$14;Tz=$15;", NULL, 0); |
63 |
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scompile("Ix=$16;Iy=$17;Iz=$18;", NULL, 0); |
64 |
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scompile("Jx=$19;Jy=$20;Jz=$21;", NULL, 0); |
65 |
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scompile("Kx=$22;Ky=$23;Kz=$24;", NULL, 0); |
66 |
< |
funset("arg", 1, l_arg); |
67 |
< |
funset("noise3", 3, l_noise3); |
68 |
< |
funset("noise3a", 3, l_noise3a); |
69 |
< |
funset("noise3b", 3, l_noise3b); |
70 |
< |
funset("noise3c", 3, l_noise3c); |
71 |
< |
funset("hermite", 5, l_hermite); |
72 |
< |
funset("fnoise3", 3, l_fnoise3); |
73 |
< |
initfile = NULL; |
66 |
> |
scompile("Lu=$26;Lv=$27;", NULL, 0); |
67 |
> |
funset("arg", 1, '=', l_arg); |
68 |
> |
funset("erf", 1, ':', l_erf); |
69 |
> |
funset("erfc", 1, ':', l_erfc); |
70 |
> |
setnoisefuncs(); |
71 |
> |
setprismfuncs(); |
72 |
> |
loadfunc(initfile); |
73 |
> |
initfile[0] = '\0'; |
74 |
|
} |
75 |
< |
fobj = m; |
76 |
< |
fray = r; |
77 |
< |
fxf.sca = r->robs * sca; |
78 |
< |
multmat4(fxf.xfm, r->robx, xfm); |
79 |
< |
eclock++; /* notify expression evaluator */ |
75 |
> |
if ((na = m->oargs.nsargs) <= ff) |
76 |
> |
goto toofew; |
77 |
> |
arg = m->oargs.sarg; |
78 |
> |
if ((f = (MFUNC *)calloc(1, sizeof(MFUNC))) == NULL) |
79 |
> |
goto memerr; |
80 |
> |
i = strlen(arg[ff]); /* set up context */ |
81 |
> |
if (i == 1 && arg[ff][0] == '.') |
82 |
> |
setcontext(f->ctx = ""); /* "." means no file */ |
83 |
> |
else { |
84 |
> |
strcpy(sbuf,arg[ff]); /* file name is context */ |
85 |
> |
if (i > LCALSUF && !strcmp(sbuf+i-LCALSUF, CALSUF)) |
86 |
> |
sbuf[i-LCALSUF] = '\0'; /* remove suffix */ |
87 |
> |
setcontext(f->ctx = savestr(sbuf)); |
88 |
> |
if (!vardefined(REFVNAME)) { /* file loaded? */ |
89 |
> |
loadfunc(arg[ff]); |
90 |
> |
varset(REFVNAME, '=', 1.0); |
91 |
> |
} else /* reference_count++ */ |
92 |
> |
varset(REFVNAME, '=', varvalue(REFVNAME)+1.0); |
93 |
> |
} |
94 |
> |
curfunc = NULL; /* parse expressions */ |
95 |
> |
sprintf(sbuf, "%s \"%s\"", ofun[m->otype].funame, m->oname); |
96 |
> |
for (i=0, ne=0; ef && i < na; i++, ef>>=1) |
97 |
> |
if (ef & 1) { /* flagged as an expression? */ |
98 |
> |
if (ne >= MAXEXPR) |
99 |
> |
objerror(m, INTERNAL, "too many expressions"); |
100 |
> |
initstr(arg[i], sbuf, 0); |
101 |
> |
f->ep[ne++] = getE1(); |
102 |
> |
if (nextc != EOF) |
103 |
> |
syntax("unexpected character"); |
104 |
> |
} |
105 |
> |
if (ef) |
106 |
> |
goto toofew; |
107 |
> |
if (i <= ff) /* find transform args */ |
108 |
> |
i = ff+1; |
109 |
> |
while (i < na && arg[i][0] != '-') |
110 |
> |
i++; |
111 |
> |
if (i == na) /* no transform */ |
112 |
> |
f->f = f->b = &unitxf; |
113 |
> |
else { /* get transform */ |
114 |
> |
if ((f->b = (XF *)malloc(sizeof(XF))) == NULL) |
115 |
> |
goto memerr; |
116 |
> |
if (invxf(f->b, na-i, arg+i) != na-i) |
117 |
> |
objerror(m, USER, "bad transform"); |
118 |
> |
if (f->b->sca < 0.0) |
119 |
> |
f->b->sca = -f->b->sca; |
120 |
> |
if (dofwd) { /* do both transforms */ |
121 |
> |
if ((f->f = (XF *)malloc(sizeof(XF))) == NULL) |
122 |
> |
goto memerr; |
123 |
> |
xf(f->f, na-i, arg+i); |
124 |
> |
if (f->f->sca < 0.0) |
125 |
> |
f->f->sca = -f->f->sca; |
126 |
> |
} |
127 |
> |
} |
128 |
> |
m->os = (char *)f; |
129 |
> |
return(f); |
130 |
> |
toofew: |
131 |
> |
objerror(m, USER, "too few string arguments"); |
132 |
> |
memerr: |
133 |
> |
error(SYSTEM, "out of memory in getfunc"); |
134 |
|
} |
135 |
|
|
136 |
|
|
137 |
< |
setfunc(m, r) /* simplified interface to setmap */ |
138 |
< |
register OBJREC *m; |
139 |
< |
RAY *r; |
137 |
> |
void |
138 |
> |
freefunc(m) /* free memory associated with modifier */ |
139 |
> |
OBJREC *m; |
140 |
|
{ |
141 |
< |
register XF *mxf; |
141 |
> |
register MFUNC *f; |
142 |
> |
register int i; |
143 |
|
|
144 |
< |
if ((mxf = (XF *)m->os) == NULL) { |
145 |
< |
register int n; |
146 |
< |
register char **sa; |
147 |
< |
|
148 |
< |
for (n = m->oargs.nsargs, sa = m->oargs.sarg; |
149 |
< |
n > 0 && **sa != '-'; n--, sa++) |
150 |
< |
; |
151 |
< |
mxf = (XF *)malloc(sizeof(XF)); |
152 |
< |
if (mxf == NULL) |
153 |
< |
goto memerr; |
154 |
< |
if (invxf(mxf->xfm, &mxf->sca, n, sa) != n) |
155 |
< |
objerror(m, USER, "bad transform"); |
84 |
< |
if (mxf->sca < 0.0) |
85 |
< |
mxf->sca = -mxf->sca; |
86 |
< |
m->os = (char *)mxf; |
144 |
> |
if ((f = (MFUNC *)m->os) == NULL) |
145 |
> |
return; |
146 |
> |
for (i = 0; f->ep[i] != NULL; i++) |
147 |
> |
epfree(f->ep[i]); |
148 |
> |
if (f->ctx[0]) { /* done with definitions */ |
149 |
> |
setcontext(f->ctx); |
150 |
> |
i = varvalue(REFVNAME)-.5; /* reference_count-- */ |
151 |
> |
if (i > 0) |
152 |
> |
varset(REFVNAME, '=', (double)i); |
153 |
> |
else |
154 |
> |
dcleanup(2); /* remove definitions */ |
155 |
> |
freestr(f->ctx); |
156 |
|
} |
157 |
< |
setmap(m, r, mxf->xfm, mxf->sca); |
158 |
< |
return; |
159 |
< |
memerr: |
160 |
< |
error(SYSTEM, "out of memory in setfunc"); |
161 |
< |
#undef mxf |
157 |
> |
if (f->b != &unitxf) |
158 |
> |
free((void *)f->b); |
159 |
> |
if (f->f != NULL && f->f != &unitxf) |
160 |
> |
free((void *)f->f); |
161 |
> |
free((void *)f); |
162 |
> |
m->os = NULL; |
163 |
|
} |
164 |
|
|
165 |
|
|
166 |
+ |
int |
167 |
+ |
setfunc(m, r) /* set channels for function call */ |
168 |
+ |
OBJREC *m; |
169 |
+ |
register RAY *r; |
170 |
+ |
{ |
171 |
+ |
static unsigned long lastrno = ~0; |
172 |
+ |
register MFUNC *f; |
173 |
+ |
/* get function */ |
174 |
+ |
if ((f = (MFUNC *)m->os) == NULL) |
175 |
+ |
objerror(m, CONSISTENCY, "setfunc called before getfunc"); |
176 |
+ |
/* set evaluator context */ |
177 |
+ |
setcontext(f->ctx); |
178 |
+ |
/* check to see if matrix set */ |
179 |
+ |
if (m == fobj && r->rno == lastrno) |
180 |
+ |
return(0); |
181 |
+ |
fobj = m; |
182 |
+ |
fray = r; |
183 |
+ |
if (r->rox != NULL) |
184 |
+ |
if (f->b != &unitxf) { |
185 |
+ |
funcxf.sca = r->rox->b.sca * f->b->sca; |
186 |
+ |
multmat4(funcxf.xfm, r->rox->b.xfm, f->b->xfm); |
187 |
+ |
} else |
188 |
+ |
funcxf = r->rox->b; |
189 |
+ |
else |
190 |
+ |
funcxf = *(f->b); |
191 |
+ |
lastrno = r->rno; |
192 |
+ |
eclock++; /* notify expression evaluator */ |
193 |
+ |
return(1); |
194 |
+ |
} |
195 |
+ |
|
196 |
+ |
|
197 |
+ |
void |
198 |
|
loadfunc(fname) /* load definition file */ |
199 |
|
char *fname; |
200 |
|
{ |
99 |
– |
extern char *libpath; /* library search path */ |
201 |
|
char *ffname; |
202 |
|
|
203 |
< |
if ((ffname = getpath(fname, libpath, R_OK)) == NULL) { |
203 |
> |
if ((ffname = getpath(fname, getrlibpath(), R_OK)) == NULL) { |
204 |
|
sprintf(errmsg, "cannot find function file \"%s\"", fname); |
205 |
|
error(USER, errmsg); |
206 |
|
} |
208 |
|
} |
209 |
|
|
210 |
|
|
211 |
< |
double |
212 |
< |
l_arg() /* return nth real argument */ |
211 |
> |
static double |
212 |
> |
l_arg(char *nm) /* return nth real argument */ |
213 |
|
{ |
113 |
– |
extern double argument(); |
214 |
|
register int n; |
215 |
|
|
216 |
+ |
if (fobj == NULL) |
217 |
+ |
syntax("arg(n) used in constant expression"); |
218 |
+ |
|
219 |
|
n = argument(1) + .5; /* round to integer */ |
220 |
|
|
221 |
|
if (n < 1) |
229 |
|
} |
230 |
|
|
231 |
|
|
232 |
+ |
static double |
233 |
+ |
l_erf(char *nm) /* error function */ |
234 |
+ |
{ |
235 |
+ |
extern double erf(); |
236 |
+ |
|
237 |
+ |
return(erf(argument(1))); |
238 |
+ |
} |
239 |
+ |
|
240 |
+ |
|
241 |
+ |
static double |
242 |
+ |
l_erfc(char *nm) /* cumulative error function */ |
243 |
+ |
{ |
244 |
+ |
extern double erfc(); |
245 |
+ |
|
246 |
+ |
return(erfc(argument(1))); |
247 |
+ |
} |
248 |
+ |
|
249 |
+ |
|
250 |
|
double |
251 |
|
chanvalue(n) /* return channel n to calcomp */ |
252 |
|
register int n; |
253 |
|
{ |
254 |
< |
double sum; |
255 |
< |
register RAY *r; |
254 |
> |
if (fray == NULL) |
255 |
> |
syntax("ray parameter used in constant expression"); |
256 |
|
|
257 |
|
if (--n < 0) |
258 |
|
goto badchan; |
259 |
|
|
260 |
< |
if (n < 3) /* ray direction */ |
260 |
> |
if (n <= 2) /* ray direction */ |
261 |
|
|
262 |
< |
return( ( fray->rdir[0]*fxf.xfm[0][n] + |
263 |
< |
fray->rdir[1]*fxf.xfm[1][n] + |
264 |
< |
fray->rdir[2]*fxf.xfm[2][n] ) |
265 |
< |
/ fxf.sca ); |
262 |
> |
return( ( fray->rdir[0]*funcxf.xfm[0][n] + |
263 |
> |
fray->rdir[1]*funcxf.xfm[1][n] + |
264 |
> |
fray->rdir[2]*funcxf.xfm[2][n] ) |
265 |
> |
/ funcxf.sca ); |
266 |
|
|
267 |
< |
if (n < 6) /* surface normal */ |
267 |
> |
if (n <= 5) /* surface normal */ |
268 |
|
|
269 |
< |
return( ( fray->ron[0]*fxf.xfm[0][n-3] + |
270 |
< |
fray->ron[1]*fxf.xfm[1][n-3] + |
271 |
< |
fray->ron[2]*fxf.xfm[2][n-3] ) |
272 |
< |
/ fxf.sca ); |
269 |
> |
return( ( fray->ron[0]*funcxf.xfm[0][n-3] + |
270 |
> |
fray->ron[1]*funcxf.xfm[1][n-3] + |
271 |
> |
fray->ron[2]*funcxf.xfm[2][n-3] ) |
272 |
> |
/ funcxf.sca ); |
273 |
|
|
274 |
< |
if (n < 9) /* intersection */ |
274 |
> |
if (n <= 8) /* intersection */ |
275 |
|
|
276 |
< |
return( fray->rop[0]*fxf.xfm[0][n-6] + |
277 |
< |
fray->rop[1]*fxf.xfm[1][n-6] + |
278 |
< |
fray->rop[2]*fxf.xfm[2][n-6] + |
279 |
< |
fxf.xfm[3][n-6] ); |
276 |
> |
return( fray->rop[0]*funcxf.xfm[0][n-6] + |
277 |
> |
fray->rop[1]*funcxf.xfm[1][n-6] + |
278 |
> |
fray->rop[2]*funcxf.xfm[2][n-6] + |
279 |
> |
funcxf.xfm[3][n-6] ); |
280 |
|
|
281 |
< |
if (n == 9) { /* distance */ |
281 |
> |
if (n == 9) /* total distance */ |
282 |
> |
return(raydist(fray,PRIMARY) * funcxf.sca); |
283 |
|
|
284 |
< |
sum = fray->rot; |
285 |
< |
for (r = fray->parent; r != NULL; r = r->parent) |
286 |
< |
sum += r->rot; |
287 |
< |
return(sum * fxf.sca); |
284 |
> |
if (n == 10) /* dot product (range [-1,1]) */ |
285 |
> |
return( fray->rod <= -1.0 ? -1.0 : |
286 |
> |
fray->rod >= 1.0 ? 1.0 : |
287 |
> |
fray->rod ); |
288 |
|
|
167 |
– |
} |
168 |
– |
if (n == 10) /* dot product */ |
169 |
– |
return(fray->rod); |
170 |
– |
|
289 |
|
if (n == 11) /* scale */ |
290 |
< |
return(fxf.sca); |
290 |
> |
return(funcxf.sca); |
291 |
|
|
292 |
< |
if (n < 15) /* origin */ |
293 |
< |
return(fxf.xfm[3][n-12]); |
292 |
> |
if (n <= 14) /* origin */ |
293 |
> |
return(funcxf.xfm[3][n-12]); |
294 |
|
|
295 |
< |
if (n < 18) /* i unit vector */ |
296 |
< |
return(fxf.xfm[0][n-15] / fxf.sca); |
295 |
> |
if (n <= 17) /* i unit vector */ |
296 |
> |
return(funcxf.xfm[0][n-15] / funcxf.sca); |
297 |
|
|
298 |
< |
if (n < 21) /* j unit vector */ |
299 |
< |
return(fxf.xfm[1][n-15] / fxf.sca); |
298 |
> |
if (n <= 20) /* j unit vector */ |
299 |
> |
return(funcxf.xfm[1][n-18] / funcxf.sca); |
300 |
|
|
301 |
< |
if (n < 24) /* k unit vector */ |
302 |
< |
return(fxf.xfm[2][n-21] / fxf.sca); |
301 |
> |
if (n <= 23) /* k unit vector */ |
302 |
> |
return(funcxf.xfm[2][n-21] / funcxf.sca); |
303 |
> |
|
304 |
> |
if (n == 24) /* single ray (shadow) distance */ |
305 |
> |
return((fray->rot+raydist(fray->parent,SHADOW)) * funcxf.sca); |
306 |
> |
|
307 |
> |
if (n <= 26) /* local (u,v) coordinates */ |
308 |
> |
return(fray->uv[n-25]); |
309 |
|
badchan: |
310 |
|
error(USER, "illegal channel number"); |
311 |
+ |
return(0.0); |
312 |
|
} |