1 |
greg |
1.1 |
#ifndef lint |
2 |
greg |
2.14 |
static const char RCSid[] = "$Id$"; |
3 |
greg |
1.1 |
#endif |
4 |
|
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/* |
5 |
|
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* func.c - interface to calcomp functions. |
6 |
greg |
2.14 |
*/ |
7 |
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8 |
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/* ==================================================================== |
9 |
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* The Radiance Software License, Version 1.0 |
10 |
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* |
11 |
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* Copyright (c) 1990 - 2002 The Regents of the University of California, |
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* through Lawrence Berkeley National Laboratory. All rights reserved. |
13 |
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* |
14 |
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* Redistribution and use in source and binary forms, with or without |
15 |
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* modification, are permitted provided that the following conditions |
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* are met: |
17 |
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* |
18 |
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* 1. Redistributions of source code must retain the above copyright |
19 |
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* notice, this list of conditions and the following disclaimer. |
20 |
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* |
21 |
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* 2. Redistributions in binary form must reproduce the above copyright |
22 |
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* notice, this list of conditions and the following disclaimer in |
23 |
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* the documentation and/or other materials provided with the |
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* distribution. |
25 |
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* |
26 |
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* 3. The end-user documentation included with the redistribution, |
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* if any, must include the following acknowledgment: |
28 |
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* "This product includes Radiance software |
29 |
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* (http://radsite.lbl.gov/) |
30 |
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* developed by the Lawrence Berkeley National Laboratory |
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* (http://www.lbl.gov/)." |
32 |
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* Alternately, this acknowledgment may appear in the software itself, |
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* if and wherever such third-party acknowledgments normally appear. |
34 |
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* |
35 |
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* 4. The names "Radiance," "Lawrence Berkeley National Laboratory" |
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* and "The Regents of the University of California" must |
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* not be used to endorse or promote products derived from this |
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* software without prior written permission. For written |
39 |
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* permission, please contact [email protected]. |
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* |
41 |
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* 5. Products derived from this software may not be called "Radiance", |
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* nor may "Radiance" appear in their name, without prior written |
43 |
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* permission of Lawrence Berkeley National Laboratory. |
44 |
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* |
45 |
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
46 |
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
47 |
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
48 |
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* DISCLAIMED. IN NO EVENT SHALL Lawrence Berkeley National Laboratory OR |
49 |
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
50 |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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* ==================================================================== |
58 |
greg |
1.1 |
* |
59 |
greg |
2.14 |
* This software consists of voluntary contributions made by many |
60 |
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* individuals on behalf of Lawrence Berkeley National Laboratory. For more |
61 |
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* information on Lawrence Berkeley National Laboratory, please see |
62 |
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* <http://www.lbl.gov/>. |
63 |
greg |
1.1 |
*/ |
64 |
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65 |
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#include "ray.h" |
66 |
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|
67 |
|
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#include "otypes.h" |
68 |
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|
69 |
greg |
2.2 |
#include "func.h" |
70 |
greg |
1.1 |
|
71 |
greg |
2.2 |
|
72 |
greg |
1.21 |
#define INITFILE "rayinit.cal" |
73 |
greg |
2.2 |
#define CALSUF ".cal" |
74 |
|
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#define LCALSUF 4 |
75 |
greg |
2.10 |
char REFVNAME[] = "`FILE_REFCNT"; |
76 |
greg |
1.21 |
|
77 |
greg |
1.13 |
XF unitxf = { /* identity transform */ |
78 |
greg |
2.8 |
{{1.0, 0.0, 0.0, 0.0}, |
79 |
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{0.0, 1.0, 0.0, 0.0}, |
80 |
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{0.0, 0.0, 1.0, 0.0}, |
81 |
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{0.0, 0.0, 0.0, 1.0}}, |
82 |
greg |
1.13 |
1.0 |
83 |
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}; |
84 |
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|
85 |
greg |
1.12 |
XF funcxf; /* current transformation */ |
86 |
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static OBJREC *fobj = NULL; /* current function object */ |
87 |
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static RAY *fray = NULL; /* current function ray */ |
88 |
greg |
1.1 |
|
89 |
greg |
2.2 |
static double l_erf(), l_erfc(), l_arg(); |
90 |
greg |
1.1 |
|
91 |
greg |
2.2 |
|
92 |
|
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MFUNC * |
93 |
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getfunc(m, ff, ef, dofwd) /* get function for this modifier */ |
94 |
greg |
1.1 |
OBJREC *m; |
95 |
greg |
2.2 |
int ff; |
96 |
greg |
2.14 |
unsigned int ef; |
97 |
greg |
2.2 |
int dofwd; |
98 |
|
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{ |
99 |
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static char initfile[] = INITFILE; |
100 |
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char sbuf[MAXSTR]; |
101 |
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register char **arg; |
102 |
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register MFUNC *f; |
103 |
|
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int ne, na; |
104 |
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register int i; |
105 |
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/* check to see if done already */ |
106 |
|
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if ((f = (MFUNC *)m->os) != NULL) |
107 |
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return(f); |
108 |
greg |
2.7 |
fobj = NULL; fray = NULL; |
109 |
greg |
2.2 |
if (initfile[0]) { /* initialize on first call */ |
110 |
greg |
2.14 |
esupport |= E_VARIABLE|E_FUNCTION|E_INCHAN|E_RCONST|E_REDEFW; |
111 |
|
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esupport &= ~(E_OUTCHAN); |
112 |
greg |
2.2 |
setcontext(""); |
113 |
|
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scompile("Dx=$1;Dy=$2;Dz=$3;", NULL, 0); |
114 |
|
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scompile("Nx=$4;Ny=$5;Nz=$6;", NULL, 0); |
115 |
|
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scompile("Px=$7;Py=$8;Pz=$9;", NULL, 0); |
116 |
greg |
2.6 |
scompile("T=$10;Ts=$25;Rdot=$11;", NULL, 0); |
117 |
greg |
2.2 |
scompile("S=$12;Tx=$13;Ty=$14;Tz=$15;", NULL, 0); |
118 |
|
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scompile("Ix=$16;Iy=$17;Iz=$18;", NULL, 0); |
119 |
|
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scompile("Jx=$19;Jy=$20;Jz=$21;", NULL, 0); |
120 |
|
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scompile("Kx=$22;Ky=$23;Kz=$24;", NULL, 0); |
121 |
|
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funset("arg", 1, '=', l_arg); |
122 |
|
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funset("erf", 1, ':', l_erf); |
123 |
|
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funset("erfc", 1, ':', l_erfc); |
124 |
|
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setnoisefuncs(); |
125 |
greg |
2.11 |
setprismfuncs(); |
126 |
greg |
2.2 |
loadfunc(initfile); |
127 |
|
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initfile[0] = '\0'; |
128 |
|
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} |
129 |
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if ((na = m->oargs.nsargs) <= ff) |
130 |
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goto toofew; |
131 |
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arg = m->oargs.sarg; |
132 |
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if ((f = (MFUNC *)calloc(1, sizeof(MFUNC))) == NULL) |
133 |
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goto memerr; |
134 |
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i = strlen(arg[ff]); /* set up context */ |
135 |
|
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if (i == 1 && arg[ff][0] == '.') |
136 |
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setcontext(f->ctx = ""); /* "." means no file */ |
137 |
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else { |
138 |
greg |
2.14 |
strcpy(sbuf,arg[ff]); /* file name is context */ |
139 |
greg |
2.2 |
if (i > LCALSUF && !strcmp(sbuf+i-LCALSUF, CALSUF)) |
140 |
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sbuf[i-LCALSUF] = '\0'; /* remove suffix */ |
141 |
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setcontext(f->ctx = savestr(sbuf)); |
142 |
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if (!vardefined(REFVNAME)) { /* file loaded? */ |
143 |
greg |
2.5 |
loadfunc(arg[ff]); |
144 |
greg |
2.2 |
varset(REFVNAME, '=', 1.0); |
145 |
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} else /* reference_count++ */ |
146 |
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varset(REFVNAME, '=', varvalue(REFVNAME)+1.0); |
147 |
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} |
148 |
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curfunc = NULL; /* parse expressions */ |
149 |
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sprintf(sbuf, "%s \"%s\"", ofun[m->otype].funame, m->oname); |
150 |
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for (i=0, ne=0; ef && i < na; i++, ef>>=1) |
151 |
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if (ef & 1) { /* flagged as an expression? */ |
152 |
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if (ne >= MAXEXPR) |
153 |
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objerror(m, INTERNAL, "too many expressions"); |
154 |
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initstr(arg[i], sbuf, 0); |
155 |
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f->ep[ne++] = getE1(); |
156 |
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if (nextc != EOF) |
157 |
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syntax("unexpected character"); |
158 |
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} |
159 |
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if (ef) |
160 |
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goto toofew; |
161 |
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if (i <= ff) /* find transform args */ |
162 |
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i = ff+1; |
163 |
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while (i < na && arg[i][0] != '-') |
164 |
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i++; |
165 |
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if (i == na) /* no transform */ |
166 |
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f->f = f->b = &unitxf; |
167 |
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else { /* get transform */ |
168 |
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if ((f->b = (XF *)malloc(sizeof(XF))) == NULL) |
169 |
greg |
2.3 |
goto memerr; |
170 |
greg |
2.2 |
if (invxf(f->b, na-i, arg+i) != na-i) |
171 |
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objerror(m, USER, "bad transform"); |
172 |
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if (f->b->sca < 0.0) |
173 |
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f->b->sca = -f->b->sca; |
174 |
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if (dofwd) { /* do both transforms */ |
175 |
|
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if ((f->f = (XF *)malloc(sizeof(XF))) == NULL) |
176 |
greg |
2.3 |
goto memerr; |
177 |
greg |
2.2 |
xf(f->f, na-i, arg+i); |
178 |
|
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if (f->f->sca < 0.0) |
179 |
|
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f->f->sca = -f->f->sca; |
180 |
|
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} |
181 |
|
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} |
182 |
|
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m->os = (char *)f; |
183 |
|
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return(f); |
184 |
|
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toofew: |
185 |
greg |
2.4 |
objerror(m, USER, "too few string arguments"); |
186 |
greg |
2.2 |
memerr: |
187 |
|
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error(SYSTEM, "out of memory in getfunc"); |
188 |
|
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} |
189 |
|
|
|
190 |
|
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|
191 |
greg |
2.14 |
void |
192 |
greg |
2.2 |
freefunc(m) /* free memory associated with modifier */ |
193 |
|
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OBJREC *m; |
194 |
|
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{ |
195 |
|
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register MFUNC *f; |
196 |
|
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register int i; |
197 |
|
|
|
198 |
|
|
if ((f = (MFUNC *)m->os) == NULL) |
199 |
|
|
return; |
200 |
|
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for (i = 0; f->ep[i] != NULL; i++) |
201 |
|
|
epfree(f->ep[i]); |
202 |
|
|
if (f->ctx[0]) { /* done with definitions */ |
203 |
|
|
setcontext(f->ctx); |
204 |
|
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i = varvalue(REFVNAME)-.5; /* reference_count-- */ |
205 |
|
|
if (i > 0) |
206 |
|
|
varset(REFVNAME, '=', (double)i); |
207 |
|
|
else |
208 |
|
|
dcleanup(2); /* remove definitions */ |
209 |
|
|
freestr(f->ctx); |
210 |
|
|
} |
211 |
|
|
if (f->b != &unitxf) |
212 |
greg |
2.14 |
free((void *)f->b); |
213 |
greg |
2.2 |
if (f->f != NULL && f->f != &unitxf) |
214 |
greg |
2.14 |
free((void *)f->f); |
215 |
|
|
free((void *)f); |
216 |
greg |
2.2 |
m->os = NULL; |
217 |
|
|
} |
218 |
|
|
|
219 |
|
|
|
220 |
greg |
2.14 |
int |
221 |
greg |
2.2 |
setfunc(m, r) /* set channels for function call */ |
222 |
|
|
OBJREC *m; |
223 |
greg |
1.1 |
register RAY *r; |
224 |
|
|
{ |
225 |
greg |
2.9 |
static unsigned long lastrno = ~0; |
226 |
greg |
2.2 |
register MFUNC *f; |
227 |
|
|
/* get function */ |
228 |
|
|
if ((f = (MFUNC *)m->os) == NULL) |
229 |
greg |
2.14 |
objerror(m, CONSISTENCY, "setfunc called before getfunc"); |
230 |
greg |
2.2 |
/* set evaluator context */ |
231 |
|
|
setcontext(f->ctx); |
232 |
|
|
/* check to see if matrix set */ |
233 |
greg |
1.16 |
if (m == fobj && r->rno == lastrno) |
234 |
greg |
1.17 |
return(0); |
235 |
greg |
1.1 |
fobj = m; |
236 |
|
|
fray = r; |
237 |
greg |
1.13 |
if (r->rox != NULL) |
238 |
greg |
2.2 |
if (f->b != &unitxf) { |
239 |
|
|
funcxf.sca = r->rox->b.sca * f->b->sca; |
240 |
|
|
multmat4(funcxf.xfm, r->rox->b.xfm, f->b->xfm); |
241 |
greg |
1.13 |
} else |
242 |
|
|
copystruct(&funcxf, &r->rox->b); |
243 |
|
|
else |
244 |
greg |
2.2 |
copystruct(&funcxf, f->b); |
245 |
greg |
1.16 |
lastrno = r->rno; |
246 |
greg |
1.1 |
eclock++; /* notify expression evaluator */ |
247 |
greg |
1.17 |
return(1); |
248 |
greg |
1.1 |
} |
249 |
|
|
|
250 |
|
|
|
251 |
greg |
2.14 |
void |
252 |
greg |
1.1 |
loadfunc(fname) /* load definition file */ |
253 |
|
|
char *fname; |
254 |
|
|
{ |
255 |
|
|
char *ffname; |
256 |
|
|
|
257 |
greg |
2.12 |
if ((ffname = getpath(fname, getlibpath(), R_OK)) == NULL) { |
258 |
greg |
1.1 |
sprintf(errmsg, "cannot find function file \"%s\"", fname); |
259 |
|
|
error(USER, errmsg); |
260 |
|
|
} |
261 |
|
|
fcompile(ffname); |
262 |
|
|
} |
263 |
|
|
|
264 |
|
|
|
265 |
greg |
2.2 |
static double |
266 |
greg |
1.1 |
l_arg() /* return nth real argument */ |
267 |
|
|
{ |
268 |
|
|
register int n; |
269 |
|
|
|
270 |
greg |
2.7 |
if (fobj == NULL) |
271 |
|
|
syntax("arg(n) used in constant expression"); |
272 |
|
|
|
273 |
greg |
1.1 |
n = argument(1) + .5; /* round to integer */ |
274 |
|
|
|
275 |
|
|
if (n < 1) |
276 |
|
|
return(fobj->oargs.nfargs); |
277 |
|
|
|
278 |
|
|
if (n > fobj->oargs.nfargs) { |
279 |
|
|
sprintf(errmsg, "missing real argument %d", n); |
280 |
|
|
objerror(fobj, USER, errmsg); |
281 |
|
|
} |
282 |
|
|
return(fobj->oargs.farg[n-1]); |
283 |
greg |
1.19 |
} |
284 |
|
|
|
285 |
|
|
|
286 |
greg |
2.2 |
static double |
287 |
greg |
1.19 |
l_erf() /* error function */ |
288 |
|
|
{ |
289 |
|
|
extern double erf(); |
290 |
|
|
|
291 |
|
|
return(erf(argument(1))); |
292 |
|
|
} |
293 |
|
|
|
294 |
|
|
|
295 |
greg |
2.2 |
static double |
296 |
greg |
1.19 |
l_erfc() /* cumulative error function */ |
297 |
|
|
{ |
298 |
|
|
extern double erfc(); |
299 |
|
|
|
300 |
|
|
return(erfc(argument(1))); |
301 |
greg |
1.1 |
} |
302 |
|
|
|
303 |
|
|
|
304 |
|
|
double |
305 |
|
|
chanvalue(n) /* return channel n to calcomp */ |
306 |
|
|
register int n; |
307 |
|
|
{ |
308 |
greg |
2.7 |
if (fray == NULL) |
309 |
|
|
syntax("ray parameter used in constant expression"); |
310 |
greg |
1.1 |
|
311 |
greg |
1.10 |
if (--n < 0) |
312 |
|
|
goto badchan; |
313 |
greg |
1.1 |
|
314 |
greg |
1.8 |
if (n < 3) /* ray direction */ |
315 |
greg |
1.1 |
|
316 |
greg |
1.12 |
return( ( fray->rdir[0]*funcxf.xfm[0][n] + |
317 |
|
|
fray->rdir[1]*funcxf.xfm[1][n] + |
318 |
|
|
fray->rdir[2]*funcxf.xfm[2][n] ) |
319 |
|
|
/ funcxf.sca ); |
320 |
greg |
1.1 |
|
321 |
greg |
1.8 |
if (n < 6) /* surface normal */ |
322 |
|
|
|
323 |
greg |
1.12 |
return( ( fray->ron[0]*funcxf.xfm[0][n-3] + |
324 |
|
|
fray->ron[1]*funcxf.xfm[1][n-3] + |
325 |
|
|
fray->ron[2]*funcxf.xfm[2][n-3] ) |
326 |
|
|
/ funcxf.sca ); |
327 |
greg |
1.8 |
|
328 |
|
|
if (n < 9) /* intersection */ |
329 |
|
|
|
330 |
greg |
1.12 |
return( fray->rop[0]*funcxf.xfm[0][n-6] + |
331 |
|
|
fray->rop[1]*funcxf.xfm[1][n-6] + |
332 |
|
|
fray->rop[2]*funcxf.xfm[2][n-6] + |
333 |
|
|
funcxf.xfm[3][n-6] ); |
334 |
greg |
1.8 |
|
335 |
greg |
2.13 |
if (n == 9) /* total distance */ |
336 |
|
|
return(raydist(fray,PRIMARY) * funcxf.sca); |
337 |
greg |
1.10 |
|
338 |
greg |
1.18 |
if (n == 10) /* dot product (range [-1,1]) */ |
339 |
|
|
return( fray->rod <= -1.0 ? -1.0 : |
340 |
|
|
fray->rod >= 1.0 ? 1.0 : |
341 |
|
|
fray->rod ); |
342 |
greg |
1.10 |
|
343 |
greg |
1.8 |
if (n == 11) /* scale */ |
344 |
greg |
1.12 |
return(funcxf.sca); |
345 |
greg |
1.8 |
|
346 |
|
|
if (n < 15) /* origin */ |
347 |
greg |
1.12 |
return(funcxf.xfm[3][n-12]); |
348 |
greg |
1.8 |
|
349 |
|
|
if (n < 18) /* i unit vector */ |
350 |
greg |
1.12 |
return(funcxf.xfm[0][n-15] / funcxf.sca); |
351 |
greg |
1.8 |
|
352 |
|
|
if (n < 21) /* j unit vector */ |
353 |
greg |
1.12 |
return(funcxf.xfm[1][n-15] / funcxf.sca); |
354 |
greg |
1.8 |
|
355 |
|
|
if (n < 24) /* k unit vector */ |
356 |
greg |
1.12 |
return(funcxf.xfm[2][n-21] / funcxf.sca); |
357 |
greg |
2.6 |
|
358 |
greg |
2.13 |
if (n == 24) /* single ray (shadow) distance */ |
359 |
|
|
return((fray->rot+raydist(fray->parent,SHADOW)) * funcxf.sca); |
360 |
greg |
1.10 |
badchan: |
361 |
|
|
error(USER, "illegal channel number"); |
362 |
greg |
1.1 |
} |