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Comparing ray/src/rt/func.c (file contents):
Revision 2.9 by greg, Tue May 25 10:30:16 1993 UTC vs.
Revision 2.46 by greg, Sat Dec 6 04:13:14 2025 UTC

#	Line 1 | Line 1
1	–	/* Copyright (c) 1992 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"
16	–
13		#include  "func.h"
14	+	#include <ctype.h>
15
16
17		#define  INITFILE       "rayinit.cal"
21	–	#define  REFVNAME       "`FILE_REFCNT"
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},
#	Line 34 | 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 double  l_erf(), l_erfc(), l_arg();
34	>	static char  rayinitcal[] = INITFILE;
35
36	+	static double  l_erf(char *), l_erfc(char *), l_arg(char *);
37
38	+
39	+	void
40	+	initfunc(void)  /* initialize function evaluation */
41	+	{
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(m, ff, ef, dofwd)       /* get function for this modifier */
116	<	OBJREC  *m;
117	<	int  ff;
118	<	unsigned  ef;
119	<	int  dofwd;
115	>	getfunc(        /* get function for this modifier */
116	>	OBJREC  *m,
117	>	int  ff,
118	>	unsigned int  ef,
119	>	int  dofwd
120	>	)
121		{
47	–	extern EPNODE  *curfunc;
48	–	static char  initfile[] = INITFILE;
122		char  sbuf[MAXSTR];
123	<	register char  **arg;
124	<	register MFUNC  *f;
123	>	char  **arg;
124	>	MFUNC  *f;
125		int  ne, na;
126	<	register int  i;
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;
58	–	if (initfile[0]) {              /* initialize on first call */
59	–	setcontext("");
60	–	scompile("Dx=$1;Dy=$2;Dz=$3;", NULL, 0);
61	–	scompile("Nx=$4;Ny=$5;Nz=$6;", NULL, 0);
62	–	scompile("Px=$7;Py=$8;Pz=$9;", NULL, 0);
63	–	scompile("T=$10;Ts=$25;Rdot=$11;", NULL, 0);
64	–	scompile("S=$12;Tx=$13;Ty=$14;Tz=$15;", NULL, 0);
65	–	scompile("Ix=$16;Iy=$17;Iz=$18;", NULL, 0);
66	–	scompile("Jx=$19;Jy=$20;Jz=$21;", NULL, 0);
67	–	scompile("Kx=$22;Ky=$23;Kz=$24;", NULL, 0);
68	–	funset("arg", 1, '=', l_arg);
69	–	funset("erf", 1, ':', l_erf);
70	–	funset("erfc", 1, ':', l_erfc);
71	–	setnoisefuncs();
72	–	loadfunc(initfile);
73	–	initfile[0] = '\0';
74	–	}
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	<	setcontext(f->ctx = "");        /* "." means no file */
139	<	else {
140	<	strcpy(sbuf,arg[ff]);   /* file name is 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	<	setcontext(f->ctx = savestr(sbuf));
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	<	curfunc = NULL;                 /* parse expressions */
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? */
#	Line 100 | Line 156 | int  dofwd;
156		initstr(arg[i], sbuf, 0);
157		f->ep[ne++] = getE1();
158		if (nextc != EOF)
159	<	syntax("unexpected character");
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 && arg[i][0] != '-')
165	>	while (i < na && !isxfopt(arg[i]))
166		i++;
167	<	if (i == na)                    /* no transform */
168	<	f->f = f->b = &unitxf;
169	<	else {                          /* get transform */
170	<	if ((f->b = (XF *)malloc(sizeof(XF))) == NULL)
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->b, na-i, arg+i) != na-i)
172	>	if (invxf(f->bxp, na-i, arg+i) != na-i)
173		objerror(m, USER, "bad transform");
174	<	if (f->b->sca < 0.0)
175	<	f->b->sca = -f->b->sca;
174	>	if (f->bxp->sca < 0.0)
175	>	f->bxp->sca = -f->bxp->sca;
176		if (dofwd) {                    /* do both transforms */
177	<	if ((f->f = (XF *)malloc(sizeof(XF))) == NULL)
177	>	if ((f->fxp = (XF *)malloc(sizeof(XF))) == NULL)
178		goto memerr;
179	<	xf(f->f, na-i, arg+i);
180	<	if (f->f->sca < 0.0)
181	<	f->f->sca = -f->f->sca;
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;
#	Line 131 | Line 187 | 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	<	freefunc(m)                     /* free memory associated with modifier */
195	<	OBJREC  *m;
194	>	void
195	>	freefunc(                       /* free memory associated with modifier */
196	>	OBJREC  *m
197	>	)
198		{
199	<	register MFUNC  *f;
200	<	register int  i;
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]);
205	>	epfree(f->ep[i],1);
206		if (f->ctx[0]) {                        /* done with definitions */
207	<	setcontext(f->ctx);
207	>	calcontext(f->ctx);
208		i = varvalue(REFVNAME)-.5;      /* reference_count-- */
209		if (i > 0)
210		varset(REFVNAME, '=', (double)i);
#	Line 153 | Line 212 | OBJREC  *m;
212		dcleanup(2);            /* remove definitions */
213		freestr(f->ctx);
214		}
215	<	if (f->b != &unitxf)
216	<	free((char *)f->b);
217	<	if (f->f != NULL && f->f != &unitxf)
218	<	free((char *)f->f);
219	<	free((char *)f);
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	<	setfunc(m, r)                   /* set channels for function call */
225	<	OBJREC  *m;
226	<	register RAY  *r;
224	>	int
225	>	setfunc(                        /* set channels for function call */
226	>	OBJREC  *m,
227	>	RAY     *r
228	>	)
229		{
230	<	static unsigned long  lastrno = ~0;
231	<	register MFUNC  *f;
232	<	/* get function */
230	>	static RNUMBER  lastrno = ~0;
231	>	MFUNC           *f;
232	>	/* get function if any */
233		if ((f = (MFUNC *)m->os) == NULL)
234	<	error(m, CONSISTENCY, "setfunc called before getfunc");
235	<	/* set evaluator context */
236	<	setcontext(f->ctx);
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)
238	>	if ((m == fobj) & (r->rno == lastrno))
239		return(0);
240		fobj = m;
241		fray = r;
242	<	if (r->rox != NULL)
243	<	if (f->b != &unitxf) {
244	<	funcxf.sca = r->rox->b.sca * f->b->sca;
245	<	multmat4(funcxf.xfm, r->rox->b.xfm, f->b->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, f->b);
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	<	loadfunc(fname)                 /* load definition file */
257	<	char  *fname;
256	>	int
257	>	worldfunc(                      /* special function context sans object */
258	>	const char      *ctx,
259	>	RAY     *r
260	>	)
261		{
262	<	extern char  *libpath;          /* library search path */
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	>	void
278	>	loadfunc(                       /* load definition file */
279	>	char  *fname
280	>	)
281	>	{
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		static double
293	<	l_arg()                         /* return nth real argument */
293	>	l_arg(char *nm)                 /* return nth real argument */
294		{
295	<	extern double  argument();
213	<	register int  n;
295	>	int  n;
296
297		if (fobj == NULL)
298	<	syntax("arg(n) used in constant expression");
298	>	error(USER,
299	>	"bad call to arg(n) - illegal constant in .cal file?");
300
301		n = argument(1) + .5;           /* round to integer */
302
#	Line 229 | Line 312 | l_arg()                                /* return nth real argument */
312
313
314		static double
315	<	l_erf()                         /* error function */
315	>	l_erf(char *nm)                 /* error function */
316		{
234	–	extern double  erf();
235	–
317		return(erf(argument(1)));
318		}
319
320
321		static double
322	<	l_erfc()                        /* cumulative error function */
322	>	l_erfc(char *nm)                /* cumulative error function */
323		{
243	–	extern double  erfc();
244	–
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		{
253	–	double  sum;
254	–	register RAY  *r;
255	–
333		if (fray == NULL)
334	<	syntax("ray parameter used in constant expression");
334	>	esyntax("ray parameter used in constant expression");
335
336		if (--n < 0)
337		goto badchan;
#	Line 273 | 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) {                   /* total distance */
361	<	sum = fray->rot;
285	<	for (r = fray->parent; r != NULL; r = r->parent)
286	<	sum += r->rot;
287	<	return(sum * funcxf.sca);
360	>	if (n == 9)                     /* total distance */
361	>	return(raydist(fray,PRIMARY) * funcxf.sca);
362
289	–	}
290	–
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 303 | 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	<	sum = fray->rot;
385	<	for (r = fray->parent; r != NULL && r->crtype&SHADOW;
386	<	r = r->parent)
387	<	sum += r->rot;
316	<	return(sum * funcxf.sca);
317	<	}
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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