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 |
|
} |
136 |
|
if (SDreportError(eval_rbfcol(&sval, rbf, odir), stderr)) |
137 |
|
return(1); |
138 |
|
} |
137 |
– |
if (repXYZ) /* ensure we have CIE (x,y) */ |
138 |
– |
c_ccvt(&sval.spec, C_CSXY); |
139 |
|
|
140 |
|
switch (outfmt) { /* write to stdout */ |
141 |
|
case 'a': |
154 |
|
cieXYZ[1] = sval.cieY; |
155 |
|
cieXYZ[2] = (1. - sval.spec.cx - sval.spec.cy) / |
156 |
|
sval.spec.cy * sval.cieY; |
157 |
< |
fwrite(cieXYZ, sizeof(double), 3, stdout); |
157 |
> |
putbinary(cieXYZ, sizeof(double), 3, stdout); |
158 |
|
} else |
159 |
< |
fwrite(&sval.cieY, sizeof(double), 1, stdout); |
159 |
> |
putbinary(&sval.cieY, sizeof(double), 1, stdout); |
160 |
|
break; |
161 |
|
case 'f': |
162 |
|
if (repXYZ) { |
165 |
|
cieXYZ[1] = sval.cieY; |
166 |
|
cieXYZ[2] = (1. - sval.spec.cx - sval.spec.cy) / |
167 |
|
sval.spec.cy * sval.cieY; |
168 |
< |
fwrite(cieXYZ, sizeof(float), 3, stdout); |
168 |
> |
putbinary(cieXYZ, sizeof(float), 3, stdout); |
169 |
|
} else { |
170 |
|
float cieY = sval.cieY; |
171 |
< |
fwrite(&cieY, sizeof(float), 1, stdout); |
171 |
> |
putbinary(&cieY, sizeof(float), 1, stdout); |
172 |
|
} |
173 |
|
break; |
174 |
|
} |