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root/radiance/ray/src/util/cmatrix.h
Revision: 2.7
Committed: Mon May 4 20:53:21 2015 UTC (8 years, 10 months ago) by greg
Content type: text/plain
Branch: MAIN
CVS Tags: rad5R2, rad5R0, rad5R1
Changes since 2.6: +3 -3 lines
Log Message:
Added the ability to read matrix inputs from commands as well as files

File Contents

# Content
1 /* RCSid $Id: cmatrix.h,v 2.6 2014/08/02 17:10:43 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=0, DTascii, DTrgbe, DTxyze, DTfloat, DTdouble, DTend};
19
20 extern const char *cm_fmt_id[];
21 extern const int cm_elem_size[];
22
23 /* A color coefficient matrix -- vectors have ncols==1 */
24 typedef struct {
25 int nrows, ncols;
26 COLORV cmem[3]; /* extends struct */
27 } CMATRIX;
28
29 #define COLSPEC (sizeof(COLORV)==sizeof(float) ? "%f %f %f" : "%lf %lf %lf")
30
31 #define cm_lval(cm,r,c) ((cm)->cmem + 3*((r)*(cm)->ncols + (c)))
32
33 #define cv_lval(cm,i) ((cm)->cmem + 3*(i))
34
35 /* Allocate a color coefficient matrix */
36 extern CMATRIX *cm_alloc(int nrows, int ncols);
37
38 /* Resize color coefficient matrix */
39 extern CMATRIX *cm_resize(CMATRIX *cm, int nrows);
40
41 #define cm_free(cm) free(cm)
42
43 /* Load header to obtain/check data type and matrix dimensions */
44 extern char *cm_getheader(int *dt, int *nr, int *nc, FILE *fp);
45
46 /* Allocate and load a matrix from the given input (or stdin if NULL) */
47 extern CMATRIX *cm_load(const char *inspec, int nrows, int ncols, int dtype);
48
49 /* Extract a column vector from a matrix */
50 extern CMATRIX *cm_column(const CMATRIX *cm, int c);
51
52 /* Scale a matrix by a single value */
53 extern CMATRIX *cm_scale(const CMATRIX *cm1, const COLOR sca);
54
55 /* Multiply two matrices (or a matrix and a vector) and allocate the result */
56 extern CMATRIX *cm_multiply(const CMATRIX *cm1, const CMATRIX *cm2);
57
58 /* write out matrix to file (precede by resolution string if picture) */
59 extern int cm_write(const CMATRIX *cm, int dtype, FILE *fp);
60
61 /* Load and convert a matrix BTDF from the given XML file */
62 extern CMATRIX *cm_loadBTDF(char *fname);
63
64 #ifdef __cplusplus
65 }
66 #endif
67 #endif /* _RAD_CMATRIX_H_ */