5 |
|
* Query values from the given BSDF (scattering interpolant or XML repres.) |
6 |
|
* Input query is incident and exiting vectors directed away from surface. |
7 |
|
* We normalize. Output is a BSDF value for the vector pair. |
8 |
+ |
* A zero length in or out vector is ignored, causing output to be flushed. |
9 |
|
* It is wise to sort the input directions to keep identical ones together |
10 |
|
* when using a scattering interpolant representation. |
11 |
|
*/ |
15 |
|
#include <string.h> |
16 |
|
#include <stdlib.h> |
17 |
|
#include "rtmath.h" |
18 |
+ |
#include "rtio.h" |
19 |
|
#include "bsdfrep.h" |
20 |
|
|
21 |
|
char *progname; |
26 |
|
{ |
27 |
|
double dvec[6]; |
28 |
|
float fvec[6]; |
29 |
< |
|
29 |
> |
tryagain: |
30 |
|
switch (fmt) { |
31 |
|
case 'a': |
32 |
|
if (fscanf(fp, FVFORMAT, &idir[0], &idir[1], &idir[2]) != 3 || |
34 |
|
return(0); |
35 |
|
break; |
36 |
|
case 'd': |
37 |
< |
if (fread(dvec, sizeof(double), 6, fp) != 6) |
37 |
> |
if (getbinary(dvec, sizeof(double), 6, fp) != 6) |
38 |
|
return(0); |
39 |
|
VCOPY(idir, dvec); |
40 |
|
VCOPY(odir, dvec+3); |
41 |
|
break; |
42 |
|
case 'f': |
43 |
< |
if (fread(fvec, sizeof(float), 6, fp) != 6) |
43 |
> |
if (getbinary(fvec, sizeof(float), 6, fp) != 6) |
44 |
|
return(0); |
45 |
|
VCOPY(idir, fvec); |
46 |
|
VCOPY(odir, fvec+3); |
47 |
|
break; |
48 |
|
} |
49 |
|
if ((normalize(idir) == 0) | (normalize(odir) == 0)) { |
50 |
< |
fprintf(stderr, "%s: zero input vector!\n", progname); |
51 |
< |
return(0); |
50 |
> |
fflush(stdout); /* desired side-effect? */ |
51 |
> |
goto tryagain; |
52 |
|
} |
53 |
|
return(1); |
54 |
|
} |
57 |
|
int |
58 |
|
main(int argc, char *argv[]) |
59 |
|
{ |
60 |
+ |
int unbuffered = 0; |
61 |
|
int repXYZ = 0; |
62 |
|
int inpXML = -1; |
63 |
|
int inpfmt = 'a'; |
71 |
|
progname = argv[0]; |
72 |
|
while (argc > 2 && argv[1][0] == '-') { |
73 |
|
switch (argv[1][1]) { |
74 |
+ |
case 'u': /* unbuffered output */\ |
75 |
+ |
unbuffered = 1; |
76 |
+ |
break; |
77 |
|
case 'c': /* color output */ |
78 |
|
repXYZ = 1; |
79 |
|
break; |
140 |
|
if (SDreportError(eval_rbfcol(&sval, rbf, odir), stderr)) |
141 |
|
return(1); |
142 |
|
} |
137 |
– |
if (repXYZ) /* ensure we have CIE (x,y) */ |
138 |
– |
c_ccvt(&sval.spec, C_CSXY); |
143 |
|
|
144 |
|
switch (outfmt) { /* write to stdout */ |
145 |
|
case 'a': |
158 |
|
cieXYZ[1] = sval.cieY; |
159 |
|
cieXYZ[2] = (1. - sval.spec.cx - sval.spec.cy) / |
160 |
|
sval.spec.cy * sval.cieY; |
161 |
< |
fwrite(cieXYZ, sizeof(double), 3, stdout); |
161 |
> |
putbinary(cieXYZ, sizeof(double), 3, stdout); |
162 |
|
} else |
163 |
< |
fwrite(&sval.cieY, sizeof(double), 1, stdout); |
163 |
> |
putbinary(&sval.cieY, sizeof(double), 1, stdout); |
164 |
|
break; |
165 |
|
case 'f': |
166 |
|
if (repXYZ) { |
169 |
|
cieXYZ[1] = sval.cieY; |
170 |
|
cieXYZ[2] = (1. - sval.spec.cx - sval.spec.cy) / |
171 |
|
sval.spec.cy * sval.cieY; |
172 |
< |
fwrite(cieXYZ, sizeof(float), 3, stdout); |
172 |
> |
putbinary(cieXYZ, sizeof(float), 3, stdout); |
173 |
|
} else { |
174 |
|
float cieY = sval.cieY; |
175 |
< |
fwrite(&cieY, sizeof(float), 1, stdout); |
175 |
> |
putbinary(&cieY, sizeof(float), 1, stdout); |
176 |
|
} |
177 |
|
break; |
178 |
|
} |
179 |
+ |
if (unbuffered) |
180 |
+ |
fflush(stdout); |
181 |
|
} |
182 |
|
/* if (rbf != NULL) free(rbf); */ |
183 |
|
return(0); |
184 |
|
userr: |
185 |
< |
fprintf(stderr, "Usage: %s [-c][-fio] bsdf.{sir|xml}\n", progname); |
185 |
> |
fprintf(stderr, "Usage: %s [-u][-c][-fio] bsdf.{sir|xml}\n", progname); |
186 |
|
return(1); |
187 |
|
} |