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Comparing ray/src/rt/func.c (file contents):
Revision 1.18 by greg, Tue Jun 18 08:59:52 1991 UTC vs.
Revision 2.46 by greg, Sat Dec 6 04:13:14 2025 UTC

#	Line 1 | Line 1
1	–	/* Copyright (c) 1991 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		/*
5		*  func.c - interface to calcomp functions.
9	–	*
10	–	*     4/7/86
6		*/
7
8	<	#include  "ray.h"
8	>	#include "copyright.h"
9
10	+	#include  "ray.h"
11	+	#include  "paths.h"
12		#include  "otypes.h"
13	+	#include  "func.h"
14	+	#include <ctype.h>
15
16
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,
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
#	Line 27 | Line 31 | XF  funcxf;                    /* current transformation */
31		static OBJREC  *fobj = NULL;    /* current function object */
32		static RAY  *fray = NULL;       /* current function ray */
33
34	+	static char  rayinitcal[] = INITFILE;
35
36	<	setmap(m, r, bx)                /* set channels for function call */
37	<	OBJREC  *m;
38	<	register RAY  *r;
39	<	XF  *bx;
36	>	static double  l_erf(char *), l_erfc(char *), l_arg(char *);
37	>
38	>
39	>	void
40	>	initfunc(void)  /* initialize function evaluation */
41		{
42	<	extern double  l_arg();
43	<	extern long  eclock;
44	<	static char  *initfile = "rayinit.cal";
45	<	static long  lastrno = -1;
46	<	/* check to see if already set */
47	<	if (m == fobj && r->rno == lastrno)
48	<	return(0);
49	<	/* initialize if first call */
50	<	if (initfile != NULL) {
51	<	loadfunc(initfile);
52	<	scompile("Dx=$1;Dy=$2;Dz=$3;", NULL, 0);
53	<	scompile("Nx=$4;Ny=$5;Nz=$6;", NULL, 0);
54	<	scompile("Px=$7;Py=$8;Pz=$9;", NULL, 0);
55	<	scompile("T=$10;Rdot=$11;", NULL, 0);
56	<	scompile("S=$12;Tx=$13;Ty=$14;Tz=$15;", NULL, 0);
57	<	scompile("Ix=$16;Iy=$17;Iz=$18;", NULL, 0);
58	<	scompile("Jx=$19;Jy=$20;Jz=$21;", NULL, 0);
59	<	scompile("Kx=$22;Ky=$23;Kz=$24;", NULL, 0);
60	<	funset("arg", 1, '=', l_arg);
61	<	setnoisefuncs();
62	<	initfile = NULL;
42	>	if (!rayinitcal[0])     /* already done? */
43	>	return;
44	>	esupport |= E_VARIABLE|E_FUNCTION|E_INCHAN|E_RCONST|E_REDEFW;
45	>	esupport &= ~(E_OUTCHAN);
46	>	calcontext("");
47	>	scompile("Dx=$1;Dy=$2;Dz=$3;", NULL, 0);
48	>	scompile("Nx=$4;Ny=$5;Nz=$6;", NULL, 0);
49	>	scompile("Px=$7;Py=$8;Pz=$9;", NULL, 0);
50	>	scompile("T=$10;Ts=$25;Rdot=$11;", NULL, 0);
51	>	scompile("S=$12;Tx=$13;Ty=$14;Tz=$15;", NULL, 0);
52	>	scompile("Ix=$16;Iy=$17;Iz=$18;", NULL, 0);
53	>	scompile("Jx=$19;Jy=$20;Jz=$21;", NULL, 0);
54	>	scompile("Kx=$22;Ky=$23;Kz=$24;", NULL, 0);
55	>	scompile("Lu=$26;Lv=$27;", NULL, 0);
56	>	funset("arg", 1, '=', l_arg);
57	>	funset("erf", 1, ':', l_erf);
58	>	funset("erfc", 1, ':', l_erfc);
59	>	setnoisefuncs();
60	>	setprismfuncs();
61	>	loadfunc(rayinitcal);
62	>	rayinitcal[0] = '\0';
63	>	doptimize(1);           /* optimize definitions */
64	>	}
65	>
66	>
67	>	/* Set parameters for current evaluation */
68	>	void
69	>	set_eparams(const char *prms)
70	>	{
71	>	static const char       *last_params = NULL;
72	>	char                    vname[RMAXWORD];
73	>	double                  value;
74	>	char                    *cpd;
75	>	/* check if already set */
76	>	if (prms == NULL || !*prms)
77	>	return;
78	>	if (prms == last_params || (last_params != NULL &&
79	>	!strcmp(prms, last_params)))
80	>	return;
81	>	last_params = prms;             /* XXX assumes static string */
82	>	/* assign each variable */
83	>	while (*prms) {
84	>	if (isspace(*prms)) {
85	>	++prms; continue;
86	>	}
87	>	if (!isalpha(*prms))
88	>	goto bad_params;
89	>	cpd = vname;
90	>	while (*prms && (*prms != '=') & !isspace(*prms)) {
91	>	if (!isid(*prms) | (cpd-vname >= RMAXWORD-1))
92	>	goto bad_params;
93	>	*cpd++ = *prms++;
94	>	}
95	>	*cpd = '\0';
96	>	while (isspace(*prms)) prms++;
97	>	if (*prms++ != '=')
98	>	goto bad_params;
99	>	value = atof(prms);
100	>	if ((prms = fskip((char *)prms)) == NULL)
101	>	goto bad_params;
102	>	while (isspace(*prms)) prms++;
103	>	prms += (*prms == ',') | (*prms == ';') | (*prms == ':');
104	>	varset(vname, '=', value);
105		}
106	+	eclock++;               /* notify expression evaluator */
107	+	return;
108	+	bad_params:
109	+	sprintf(errmsg, "bad parameter list '%s'", last_params);
110	+	error(USER, errmsg);
111	+	}
112	+
113	+
114	+	MFUNC *
115	+	getfunc(        /* get function for this modifier */
116	+	OBJREC  *m,
117	+	int  ff,
118	+	unsigned int  ef,
119	+	int  dofwd
120	+	)
121	+	{
122	+	char  sbuf[MAXSTR];
123	+	char  **arg;
124	+	MFUNC  *f;
125	+	int  ne, na;
126	+	int  i;
127	+	/* check to see if done already */
128	+	if ((f = (MFUNC *)m->os) != NULL)
129	+	return(f);
130	+	fobj = NULL; fray = NULL;
131	+	if ((na = m->oargs.nsargs) <= ff)
132	+	goto toofew;
133	+	arg = m->oargs.sarg;
134	+	if ((f = (MFUNC *)calloc(1, sizeof(MFUNC))) == NULL)
135	+	goto memerr;
136	+	i = strlen(arg[ff]);                    /* set up context */
137	+	if (i == 1 && arg[ff][0] == '.') {
138	+	calcontext(f->ctx = "");        /* "." means no file */
139	+	} else {
140	+	strcpy(sbuf,arg[ff]);           /* file name is context */
141	+	if (i > LCALSUF && !strcmp(sbuf+i-LCALSUF, CALSUF))
142	+	sbuf[i-LCALSUF] = '\0'; /* remove suffix */
143	+	calcontext(f->ctx = savestr(sbuf));
144	+	if (!vardefined(REFVNAME)) {    /* file loaded? */
145	+	loadfunc(arg[ff]);
146	+	varset(REFVNAME, '=', 1.0);
147	+	} else                          /* reference_count++ */
148	+	varset(REFVNAME, '=', varvalue(REFVNAME)+1.0);
149	+	}
150	+	ecurfunc = NULL;                        /* parse expressions */
151	+	sprintf(sbuf, "%s \"%s\"", ofun[m->otype].funame, m->oname);
152	+	for (i=0, ne=0; ef && i < na; i++, ef>>=1)
153	+	if (ef & 1) {                   /* flagged as an expression? */
154	+	if (ne >= MAXEXPR)
155	+	objerror(m, INTERNAL, "too many expressions");
156	+	initstr(arg[i], sbuf, 0);
157	+	f->ep[ne++] = getE1();
158	+	if (nextc != EOF)
159	+	esyntax("unexpected character");
160	+	}
161	+	if (ef)
162	+	goto toofew;
163	+	if (i <= ff)                    /* find transform args */
164	+	i = ff+1;
165	+	while (i < na && !isxfopt(arg[i]))
166	+	i++;
167	+	if (i == na) {                  /* no transform */
168	+	f->fxp = f->bxp = &unitxf;
169	+	} else {                        /* get transform */
170	+	if ((f->bxp = (XF *)malloc(sizeof(XF))) == NULL)
171	+	goto memerr;
172	+	if (invxf(f->bxp, na-i, arg+i) != na-i)
173	+	objerror(m, USER, "bad transform");
174	+	if (f->bxp->sca < 0.0)
175	+	f->bxp->sca = -f->bxp->sca;
176	+	if (dofwd) {                    /* do both transforms */
177	+	if ((f->fxp = (XF *)malloc(sizeof(XF))) == NULL)
178	+	goto memerr;
179	+	xf(f->fxp, na-i, arg+i);
180	+	if (f->fxp->sca < 0.0)
181	+	f->fxp->sca = -f->fxp->sca;
182	+	}
183	+	}
184	+	m->os = (char *)f;
185	+	return(f);
186	+	toofew:
187	+	objerror(m, USER, "too few string arguments");
188	+	memerr:
189	+	error(SYSTEM, "out of memory in getfunc");
190	+	return NULL; /* pro forma return */
191	+	}
192	+
193	+
194	+	void
195	+	freefunc(                       /* free memory associated with modifier */
196	+	OBJREC  *m
197	+	)
198	+	{
199	+	MFUNC  *f;
200	+	int  i;
201	+
202	+	if ((f = (MFUNC *)m->os) == NULL)
203	+	return;
204	+	for (i = 0; f->ep[i] != NULL; i++)
205	+	epfree(f->ep[i],1);
206	+	if (f->ctx[0]) {                        /* done with definitions */
207	+	calcontext(f->ctx);
208	+	i = varvalue(REFVNAME)-.5;      /* reference_count-- */
209	+	if (i > 0)
210	+	varset(REFVNAME, '=', (double)i);
211	+	else
212	+	dcleanup(2);            /* remove definitions */
213	+	freestr(f->ctx);
214	+	}
215	+	if (f->bxp != &unitxf)
216	+	free((void *)f->bxp);
217	+	if ((f->fxp != NULL) & (f->fxp != &unitxf))
218	+	free((void *)f->fxp);
219	+	free((void *)f);
220	+	m->os = NULL;
221	+	}
222	+
223	+
224	+	int
225	+	setfunc(                        /* set channels for function call */
226	+	OBJREC  *m,
227	+	RAY     *r
228	+	)
229	+	{
230	+	static RNUMBER  lastrno = ~0;
231	+	MFUNC           *f;
232	+	/* get function if any */
233	+	if ((f = (MFUNC *)m->os) == NULL)
234	+	objerror(m, CONSISTENCY, "setfunc called before getfunc");
235	+
236	+	calcontext(f->ctx);             /* set evaluator context */
237	+	/* check to see if matrix set */
238	+	if ((m == fobj) & (r->rno == lastrno))
239	+	return(0);
240		fobj = m;
241		fray = r;
242	<	if (r->rox != NULL)
243	<	if (bx != &unitxf) {
244	<	funcxf.sca = r->rox->b.sca * bx->sca;
245	<	multmat4(funcxf.xfm, r->rox->b.xfm, bx->xfm);
242	>	if (r->rox != NULL) {
243	>	if (f->bxp != &unitxf) {
244	>	funcxf.sca = r->rox->b.sca * f->bxp->sca;
245	>	multmat4(funcxf.xfm, r->rox->b.xfm, f->bxp->xfm);
246		} else
247	<	copystruct(&funcxf, &r->rox->b);
248	<	else
249	<	copystruct(&funcxf, bx);
247	>	funcxf = r->rox->b;
248	>	} else
249	>	funcxf = *f->bxp;
250		lastrno = r->rno;
251		eclock++;               /* notify expression evaluator */
252		return(1);
253		}
254
255
256	<	setfunc(m, r)                           /* simplified interface to setmap */
257	<	register OBJREC  *m;
258	<	RAY  *r;
256	>	int
257	>	worldfunc(                      /* special function context sans object */
258	>	const char      *ctx,
259	>	RAY     *r
260	>	)
261		{
262	<	register XF  *mxf;
263	<
264	<	if ((mxf = (XF *)m->os) == NULL) {
265	<	register int  n;
266	<	register char  **sa;
267	<
268	<	for (n = m->oargs.nsargs, sa = m->oargs.sarg;
269	<	n > 0 && **sa != '-'; n--, sa++)
270	<	;
271	<	if (n == 0)
272	<	mxf = &unitxf;
273	<	else {
90	<	mxf = (XF *)malloc(sizeof(XF));
91	<	if (mxf == NULL)
92	<	goto memerr;
93	<	if (invxf(mxf, n, sa) != n)
94	<	objerror(m, USER, "bad transform");
95	<	if (mxf->sca < 0.0)
96	<	mxf->sca = -mxf->sca;
97	<	}
98	<	m->os = (char *)mxf;
99	<	}
100	<	return(setmap(m, r, mxf));
101	<	memerr:
102	<	error(SYSTEM, "out of memory in setfunc");
262	>	static RNUMBER  lastrno = ~0;
263	>	/* set evaluator context */
264	>	calcontext((char *)ctx);
265	>	/* check if ray already set */
266	>	if ((fobj == NULL) & (r->rno == lastrno))
267	>	return(0);
268	>	fobj = NULL;
269	>	fray = r;
270	>	funcxf = unitxf;
271	>	lastrno = r->rno;
272	>	eclock++;               /* notify expression evaluator */
273	>	return(1);
274		}
275
276
277	<	loadfunc(fname)                 /* load definition file */
278	<	char  *fname;
277	>	void
278	>	loadfunc(                       /* load definition file */
279	>	char  *fname
280	>	)
281		{
109	–	extern char  *libpath;          /* library search path */
282		char  *ffname;
283
284	<	if ((ffname = getpath(fname, libpath, R_OK)) == NULL) {
284	>	if ((ffname = getpath(fname, getrlibpath(), R_OK)) == NULL) {
285		sprintf(errmsg, "cannot find function file \"%s\"", fname);
286	<	error(USER, errmsg);
286	>	error(SYSTEM, errmsg);
287		}
288		fcompile(ffname);
289		}
290
291
292	<	double
293	<	l_arg()                         /* return nth real argument */
292	>	static double
293	>	l_arg(char *nm)                 /* return nth real argument */
294		{
295	<	extern double  argument();
124	<	register int  n;
295	>	int  n;
296
297	+	if (fobj == NULL)
298	+	error(USER,
299	+	"bad call to arg(n) - illegal constant in .cal file?");
300	+
301		n = argument(1) + .5;           /* round to integer */
302
303		if (n < 1)
#	Line 136 | Line 311 | l_arg()                                /* return nth real argument */
311		}
312
313
314	+	static double
315	+	l_erf(char *nm)                 /* error function */
316	+	{
317	+	return(erf(argument(1)));
318	+	}
319	+
320	+
321	+	static double
322	+	l_erfc(char *nm)                /* cumulative error function */
323	+	{
324	+	return(erfc(argument(1)));
325	+	}
326	+
327	+
328		double
329	<	chanvalue(n)                    /* return channel n to calcomp */
330	<	register int  n;
329	>	chanvalue(                      /* return channel n to calcomp */
330	>	int  n
331	>	)
332		{
333	<	double  sum;
334	<	register RAY  *r;
333	>	if (fray == NULL)
334	>	esyntax("ray parameter used in constant expression");
335
336		if (--n < 0)
337		goto badchan;
#	Line 160 | Line 350 | register int  n;
350		fray->ron[2]*funcxf.xfm[2][n-3] )
351		/ funcxf.sca );
352
353	<	if (n < 9)                      /* intersection */
353	>	if (n < 9)                      /* intersection point */
354
355		return( fray->rop[0]*funcxf.xfm[0][n-6] +
356		fray->rop[1]*funcxf.xfm[1][n-6] +
357		fray->rop[2]*funcxf.xfm[2][n-6] +
358		funcxf.xfm[3][n-6] );
359
360	<	if (n == 9) {                   /* distance */
360	>	if (n == 9)                     /* total distance */
361	>	return(raydist(fray,PRIMARY) * funcxf.sca);
362
172	–	sum = fray->rot;
173	–	for (r = fray->parent; r != NULL; r = r->parent)
174	–	sum += r->rot;
175	–	return(sum * funcxf.sca);
176	–
177	–	}
363		if (n == 10)                    /* dot product (range [-1,1]) */
364		return( fray->rod <= -1.0 ? -1.0 :
365		fray->rod >= 1.0 ? 1.0 :
#	Line 190 | Line 375 | register int  n;
375		return(funcxf.xfm[0][n-15] / funcxf.sca);
376
377		if (n < 21)                     /* j unit vector */
378	<	return(funcxf.xfm[1][n-15] / funcxf.sca);
378	>	return(funcxf.xfm[1][n-18] / funcxf.sca);
379
380		if (n < 24)                     /* k unit vector */
381		return(funcxf.xfm[2][n-21] / funcxf.sca);
382	+
383	+	if (n == 24)                    /* single ray (shadow) distance */
384	+	return((fray->rot+raydist(fray->parent,SHADOW)) * funcxf.sca);
385	+
386	+	if (n < 27)                     /* local (u,v) coordinates */
387	+	return(fray->uv[n-25]);
388		badchan:
389		error(USER, "illegal channel number");
390	+	return(0.0);
391		}

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