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root/radiance/ray/src/util/cmatrix.h
Revision: 2.3
Committed: Mon Jan 20 22:18:29 2014 UTC (10 years, 2 months ago) by greg
Content type: text/plain
Branch: MAIN
Changes since 2.2: +3 -3 lines
Log Message:
Fixed improper handling of diffuse transmission matrix

File Contents

# Content
1 /* RCSid $Id: cmatrix.h,v 2.2 2014/01/20 21:30:34 greg Exp $ */
2 /*
3 * Color matrix routine declarations.
4 *
5 * G. Ward
6 */
7
8 #ifndef _RAD_CMATRIX_H_
9 #define _RAD_CMATRIX_H_
10
11 #include "color.h"
12
13 #ifdef __cplusplus
14 extern "C" {
15 #endif
16
17 /* Data types for file loading */
18 enum {DTfromHeader, DTascii, DTfloat, DTdouble, DTrgbe, DTxyze};
19
20 /* A color coefficient matrix -- vectors have ncols==1 */
21 typedef struct {
22 int nrows, ncols;
23 COLORV cmem[3]; /* extends struct */
24 } CMATRIX;
25
26 #define COLSPEC (sizeof(COLORV)==sizeof(float) ? "%f %f %f" : "%lf %lf %lf")
27
28 #define cm_lval(cm,r,c) ((cm)->cmem + 3*((r)*(cm)->ncols + (c)))
29
30 #define cv_lval(cm,i) ((cm)->cmem + 3*(i))
31
32 /* Allocate a color coefficient matrix */
33 extern CMATRIX *cm_alloc(int nrows, int ncols);
34
35 /* Resize color coefficient matrix */
36 extern CMATRIX *cm_resize(CMATRIX *cm, int nrows);
37
38 #define cm_free(cm) free(cm)
39
40 /* Load header to obtain data type */
41 extern int getDTfromHeader(FILE *fp);
42
43 /* Allocate and load a matrix from the given file (or stdin if NULL) */
44 extern CMATRIX *cm_load(const char *fname, int nrows, int ncols, int dtype);
45
46 /* Extract a column vector from a matrix */
47 extern CMATRIX *cm_column(const CMATRIX *cm, int c);
48
49 /* Scale a matrix by a single value */
50 extern CMATRIX *cm_scale(const CMATRIX *cm1, const COLOR sca);
51
52 /* Multiply two matrices (or a matrix and a vector) and allocate the result */
53 extern CMATRIX *cm_multiply(const CMATRIX *cm1, const CMATRIX *cm2);
54
55 /* print out matrix as ASCII text -- no header */
56 extern void cm_print(const CMATRIX *cm, FILE *fp);
57
58 /* Load and convert a matrix BTDF from the given XML file */
59 extern CMATRIX *cm_loadBTDF(char *fname);
60
61 #ifdef __cplusplus
62 }
63 #endif
64 #endif /* _RAD_CMATRIX_H_ */