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root/radiance/ray/src/gen/mkillum3.c
Revision: 2.4
Committed: Mon Aug 10 15:55:10 1992 UTC (31 years, 7 months ago) by greg
Content type: text/plain
Branch: MAIN
Changes since 2.3: +35 -14 lines
Log Message:
eliminated star patterns at poles by adding pole interpolation

File Contents

# Content
1 /* Copyright (c) 1991 Regents of the University of California */
2
3 #ifndef lint
4 static char SCCSid[] = "$SunId$ LBL";
5 #endif
6
7 /*
8 * Routines to print mkillum objects
9 */
10
11 #include "mkillum.h"
12
13 #define brt(col) (.263*(col)[0]+.655*(col)[1]+.082*(col)[2])
14
15 char DATORD[] = "RGB"; /* data ordering */
16 char DATSUF[] = ".dat"; /* data file suffix */
17 char DSTSUF[] = ".dist"; /* distribution suffix */
18 char FNCFNM[] = "illum.cal"; /* function file name */
19
20
21 printobj(mod, obj) /* print out an object */
22 char *mod;
23 register OBJREC *obj;
24 {
25 register int i;
26
27 if (issurface(obj->otype) && !strcmp(mod, VOIDID))
28 return; /* don't print void surfaces */
29 printf("\n%s %s %s", mod, ofun[obj->otype].funame, obj->oname);
30 printf("\n%d", obj->oargs.nsargs);
31 for (i = 0; i < obj->oargs.nsargs; i++)
32 printf(" %s", obj->oargs.sarg[i]);
33 #ifdef IARGS
34 printf("\n%d", obj->oargs.niargs);
35 for (i = 0; i < obj->oargs.niargs; i++)
36 printf(" %d", obj->oargs.iarg[i]);
37 #else
38 printf("\n0");
39 #endif
40 printf("\n%d", obj->oargs.nfargs);
41 for (i = 0; i < obj->oargs.nfargs; i++) {
42 if (i%3 == 0)
43 putchar('\n');
44 printf(" %18.12g", obj->oargs.farg[i]);
45 }
46 putchar('\n');
47 }
48
49
50 char *
51 dfname(il, c) /* return data file name */
52 struct illum_args *il;
53 int c;
54 {
55 extern char *getpath(), *strcpy();
56 char fname[MAXSTR];
57 register char *s;
58
59 s = strcpy(fname, il->datafile);
60 s += strlen(s);
61 if (c) *s++ = c;
62 if (il->dfnum > 0) {
63 sprintf(s, "%d", il->dfnum);
64 s += strlen(s);
65 }
66 strcpy(s, DATSUF);
67 return(getpath(fname, NULL, 0));
68 }
69
70
71 FILE *
72 dfopen(il, c) /* open data file */
73 register struct illum_args *il;
74 int c;
75 {
76 char *fn;
77 FILE *fp;
78 /* get a usable file name */
79 for (fn = dfname(il, c);
80 !(il->flags & IL_DATCLB) && access(fn, F_OK) == 0;
81 fn = dfname(il, c))
82 il->dfnum++;
83 /* open it for writing */
84 if ((fp = fopen(fn, "w")) == NULL) {
85 sprintf(errmsg, "cannot open data file \"%s\"", fn);
86 error(SYSTEM, errmsg);
87 }
88 return(fp);
89 }
90
91
92 flatout(il, da, n, m, u, v, w) /* write hemispherical distribution */
93 struct illum_args *il;
94 float *da;
95 int n, m;
96 FVECT u, v, w;
97 {
98 FILE *dfp;
99 float col[3];
100 int i;
101
102 if (il->flags & IL_COLDST) {
103 printf("\n%s %s %s%s", VOIDID, ofun[PAT_CDATA].funame,
104 il->matname, DSTSUF);
105 printf("\n9 h_red h_grn h_blu");
106 for (i = 0; i < 3; i++) {
107 dfp = dfopen(il, DATORD[i]);
108 fprintf(dfp, "2\n%f %f %d\n%f %f %d\n",
109 1.-.5/n, .5/n, n,
110 0., 2.*PI, m+1);
111 colorout(i, da, n, m, 1./il->nsamps/il->col[i], dfp);
112 fclose(dfp);
113 printf(" %s", dfname(il, DATORD[i]));
114 }
115 } else {
116 printf("\n%s %s %s%s", VOIDID, ofun[PAT_BDATA].funame,
117 il->matname, DSTSUF);
118 printf("\n5 h_gry");
119 dfp = dfopen(il, 0);
120 fprintf(dfp, "2\n%f %f %d\n%f %f %d\n", 1.-.5/n, .5/n, n,
121 0., 2.*PI, m+1);
122 brightout(da, n, m, 1./il->nsamps/brt(il->col), dfp);
123 fclose(dfp);
124 printf(" %s", dfname(il, 0));
125 }
126 printf("\n\t%s il_alth il_azih", FNCFNM);
127 printf("\n0\n13\n");
128 compavg(col, da, m, il->nsamps);
129 printf("\t%f\t%f\t%f\t%f\n", col[0]/il->col[0],
130 col[1]/il->col[1], col[2]/il->col[2], 1.-.5/n);
131 printf("\t%f\t%f\t%f\n", u[0], u[1], u[2]);
132 printf("\t%f\t%f\t%f\n", v[0], v[1], v[2]);
133 printf("\t%f\t%f\t%f\n", w[0], w[1], w[2]);
134 il->dfnum++;
135 }
136
137
138 roundout(il, da, n, m) /* write spherical distribution */
139 struct illum_args *il;
140 float *da;
141 int n, m;
142 {
143 FILE *dfp;
144 float col[3];
145 int i;
146
147 if (il->flags & IL_COLDST) {
148 printf("\n%s %s %s%s", VOIDID, ofun[PAT_CDATA].funame,
149 il->matname, DSTSUF);
150 printf("\n9 s_red s_grn s_blu");
151 for (i = 0; i < 3; i++) {
152 dfp = dfopen(il, DATORD[i]);
153 fprintf(dfp, "2\n%f %f %d\n%f %f %d\n",
154 1.-1./n, -1.+1./n, n,
155 0., 2.*PI, m+1);
156 colorout(i, da, n, m, 1./il->nsamps/il->col[i], dfp);
157 fclose(dfp);
158 printf(" %s", dfname(il, DATORD[i]));
159 }
160 } else {
161 printf("\n%s %s %s%s", VOIDID, ofun[PAT_BDATA].funame,
162 il->matname, DSTSUF);
163 printf("\n5 s_gry");
164 dfp = dfopen(il, 0);
165 fprintf(dfp, "2\n%f %f %d\n%f %f %d\n", 1.-1./n, -1.+1./n, n,
166 0., 2.*PI, m+1);
167 brightout(da, n, m, 1./il->nsamps/brt(il->col), dfp);
168 fclose(dfp);
169 printf(" %s", dfname(il, 0));
170 }
171 printf("\n\t%s il_alt il_azi", FNCFNM);
172 printf("\n0\n7\n");
173 compavg(col, da, m, il->nsamps); /* north pole */
174 printf("\t%f\t%f\t%f\n", col[0]/il->col[0],
175 col[1]/il->col[1], col[2]/il->col[2]);
176 compavg(col, da+(n-1)*m*3, m, il->nsamps); /* south pole */
177 printf("\t%f\t%f\t%f\n", col[0]/il->col[0],
178 col[1]/il->col[1], col[2]/il->col[2]);
179 printf("\t%f\n", 1.-1./n);
180 il->dfnum++;
181 }
182
183
184 illumout(il, ob) /* print illum object */
185 register struct illum_args *il;
186 OBJREC *ob;
187 {
188 double cout[3];
189
190 if (il->sampdens <= 0)
191 printf("\n%s ", VOIDID);
192 else
193 printf("\n%s%s ", il->matname, DSTSUF);
194 printf("%s %s", ofun[il->flags&IL_LIGHT?MAT_LIGHT:MAT_ILLUM].funame,
195 il->matname);
196 if (il->flags & IL_LIGHT || !strcmp(il->altmat,VOIDID))
197 printf("\n0");
198 else
199 printf("\n1 %s", il->altmat);
200 if (il->flags & IL_COLAVG) {
201 cout[0] = il->col[0];
202 cout[1] = il->col[1];
203 cout[2] = il->col[2];
204 } else {
205 cout[0] = cout[1] = cout[2] = brt(il->col);
206 }
207 printf("\n0\n3 %f %f %f\n", cout[0], cout[1], cout[2]);
208
209 printobj(il->matname, ob);
210 }
211
212
213 compavg(col, da, n, ns) /* compute average for set of data values */
214 float col[3];
215 register float *da;
216 int n, ns;
217 {
218 register int i;
219
220 col[0] = col[1] = col[2] = 0.;
221 i = n;
222 while (i-- > 0) {
223 col[0] += *da++;
224 col[1] += *da++;
225 col[2] += *da++;
226 }
227 for (i = 0; i < 3; i++)
228 col[i] /= (double)(n*ns);
229 }
230
231
232 average(il, da, n) /* evaluate average value for distribution */
233 register struct illum_args *il;
234 float *da;
235 int n;
236 {
237 compavg(il->col, da, n, il->nsamps);
238 /* brighter than minimum? */
239 return(brt(il->col) > il->minbrt+FTINY);
240 }
241
242
243 static int colmcnt = 0; /* count of columns written */
244
245 fputnum(d, fp) /* put out a number to fp */
246 double d;
247 FILE *fp;
248 {
249 if (colmcnt++ % 6 == 0)
250 putc('\n', fp);
251 fprintf(fp, " %11e", d);
252 }
253
254
255 fputeol(fp) /* write end of line to fp */
256 register FILE *fp;
257 {
258 putc('\n', fp);
259 colmcnt = 0;
260 }
261
262
263 colorout(p, da, n, m, mult, fp) /* put out color distribution data */
264 int p;
265 register float *da;
266 int n, m;
267 double mult;
268 FILE *fp;
269 {
270 register int i, j;
271
272 for (i = 0; i < n; i++) {
273 for (j = 0; j < m; j++) {
274 fputnum(mult*da[p], fp);
275 da += 3;
276 }
277 fputnum(mult*da[p-3*m], fp); /* wrap phi */
278 }
279 fputeol(fp);
280 }
281
282
283 brightout(da, n, m, mult, fp) /* put out brightness distribution data */
284 register float *da;
285 int n, m;
286 double mult;
287 FILE *fp;
288 {
289 register int i, j;
290
291 for (i = 0; i < n; i++) {
292 for (j = 0; j < m; j++) {
293 fputnum(mult*brt(da), fp);
294 da += 3;
295 }
296 fputnum(mult*brt(da-3*m), fp); /* wrap phi */
297 }
298 fputeol(fp);
299 }