| 1 |
greg |
3.10 |
/* RCSid $Id: bsdf_m.h,v 3.9 2018/01/05 21:00:24 greg Exp $ */ |
| 2 |
greg |
3.1 |
/* |
| 3 |
|
|
* bsdf_m.h |
| 4 |
|
|
* |
| 5 |
greg |
3.4 |
* Support for BSDF matrices. |
| 6 |
|
|
* Assumes "bsdf.h" already included. |
| 7 |
|
|
* Include after "ezxml.h" for SDloadMtx() declaration. |
| 8 |
greg |
3.1 |
* |
| 9 |
|
|
* Created by Greg Ward on 2/2/11. |
| 10 |
|
|
* |
| 11 |
|
|
*/ |
| 12 |
|
|
|
| 13 |
|
|
#ifndef _BSDF_M_H_ |
| 14 |
|
|
#define _BSDF_M_H_ |
| 15 |
|
|
|
| 16 |
|
|
#ifdef __cplusplus |
| 17 |
|
|
extern "C" { |
| 18 |
|
|
#endif |
| 19 |
|
|
/* Fixed-position coordinate functions */ |
| 20 |
greg |
3.4 |
typedef int b_vecf(FVECT vec, double ndxr, void *c_data); |
| 21 |
greg |
3.1 |
typedef int b_ndxf(const FVECT vec, void *c_data); |
| 22 |
|
|
typedef double b_ohmf(int ndx, void *c_data); |
| 23 |
|
|
|
| 24 |
|
|
/* Rectangular matrix format BSDF */ |
| 25 |
|
|
typedef struct { |
| 26 |
|
|
int ninc; /* number of incoming directions */ |
| 27 |
|
|
int nout; /* number of outgoing directions */ |
| 28 |
|
|
void *ib_priv; /* input basis private data */ |
| 29 |
|
|
b_vecf *ib_vec; /* get input vector from index */ |
| 30 |
|
|
b_ndxf *ib_ndx; /* get input index from vector */ |
| 31 |
|
|
b_ohmf *ib_ohm; /* get input proj. SA for index */ |
| 32 |
|
|
void *ob_priv; /* output basis private data */ |
| 33 |
|
|
b_vecf *ob_vec; /* get output vector from index */ |
| 34 |
|
|
b_ndxf *ob_ndx; /* get output index from vector */ |
| 35 |
|
|
b_ohmf *ob_ohm; /* get output proj. SA for index */ |
| 36 |
greg |
3.7 |
C_CHROMA *chroma; /* chromaticity data */ |
| 37 |
greg |
3.1 |
float bsdf[1]; /* scattering data (extends struct) */ |
| 38 |
|
|
} SDMat; |
| 39 |
|
|
|
| 40 |
|
|
/* Matrix BSDF accessors */ |
| 41 |
greg |
3.4 |
#define mBSDF_incvec(v,b,ix) (*(b)->ib_vec)(v,ix,(b)->ib_priv) |
| 42 |
greg |
3.1 |
#define mBSDF_incndx(b,v) (*(b)->ib_ndx)(v,(b)->ib_priv) |
| 43 |
|
|
#define mBSDF_incohm(b,i) (*(b)->ib_ohm)(i,(b)->ib_priv) |
| 44 |
greg |
3.4 |
#define mBSDF_outvec(v,b,ox) (*(b)->ob_vec)(v,ox,(b)->ob_priv) |
| 45 |
greg |
3.1 |
#define mBSDF_outndx(b,v) (*(b)->ob_ndx)(v,(b)->ob_priv) |
| 46 |
|
|
#define mBSDF_outohm(b,o) (*(b)->ob_ohm)(o,(b)->ob_priv) |
| 47 |
greg |
3.10 |
#define mBSDF_value(b,o,i) (b)->bsdf[(o)*(b)->ninc + (i)] |
| 48 |
|
|
#define mBSDF_chroma(b,o,i) (b)->chroma[(o)*(b)->ninc + (i)] |
| 49 |
greg |
3.1 |
|
| 50 |
|
|
/* Holder for cumulative distribution (sum of BSDF * projSA) */ |
| 51 |
greg |
3.5 |
typedef struct SDMatCDst_s { |
| 52 |
|
|
SD_CDIST_BASE(SDMatCDst_s); /* base fields; must come first */ |
| 53 |
greg |
3.1 |
int indx; /* incident angle index */ |
| 54 |
|
|
void *ob_priv; /* private data for generator */ |
| 55 |
|
|
b_vecf *ob_vec; /* outbound vector generator */ |
| 56 |
|
|
int calen; /* cumulative array length */ |
| 57 |
|
|
unsigned carr[1]; /* cumulative array (extends struct) */ |
| 58 |
|
|
} SDMatCDst; |
| 59 |
|
|
|
| 60 |
greg |
3.4 |
#ifdef _EZXML_H |
| 61 |
greg |
3.1 |
/* Load a set of BSDF matrices from an open XML file */ |
| 62 |
greg |
3.3 |
extern SDError SDloadMtx(SDData *sd, ezxml_t wtl); |
| 63 |
greg |
3.4 |
#endif |
| 64 |
greg |
3.1 |
|
| 65 |
|
|
/* Our matrix handling routines */ |
| 66 |
greg |
3.9 |
extern const SDFunc SDhandleMtx; |
| 67 |
greg |
3.1 |
|
| 68 |
greg |
3.6 |
/******** Klems basis declarations for more intimate access ********/ |
| 69 |
|
|
|
| 70 |
|
|
#define MAXLATS 46 /* maximum number of latitudes */ |
| 71 |
|
|
|
| 72 |
|
|
/* BSDF angle specification */ |
| 73 |
|
|
typedef struct { |
| 74 |
|
|
char name[64]; /* basis name */ |
| 75 |
|
|
int nangles; /* total number of directions */ |
| 76 |
|
|
struct { |
| 77 |
|
|
float tmin; /* starting theta */ |
| 78 |
|
|
int nphis; /* number of phis (0 term) */ |
| 79 |
|
|
} lat[MAXLATS+1]; /* latitudes */ |
| 80 |
|
|
} ANGLE_BASIS; |
| 81 |
|
|
|
| 82 |
|
|
#define MAXABASES 7 /* limit on defined bases */ |
| 83 |
|
|
|
| 84 |
|
|
extern ANGLE_BASIS abase_list[MAXABASES]; |
| 85 |
|
|
|
| 86 |
|
|
extern int nabases; /* current number of defined bases */ |
| 87 |
|
|
|
| 88 |
greg |
3.7 |
extern C_COLOR mtx_RGB_prim[3]; /* matrix RGB primaries */ |
| 89 |
|
|
extern float mtx_RGB_coef[3]; /* corresponding Y coefficients */ |
| 90 |
|
|
|
| 91 |
|
|
/* Get color or grayscale value for BSDF in the given directions */ |
| 92 |
|
|
extern int mBSDF_color(float coef[], const SDMat *b, int i, int o); |
| 93 |
|
|
|
| 94 |
greg |
3.6 |
/* Get vector for this angle basis index (front exiting) */ |
| 95 |
|
|
extern b_vecf fo_getvec; |
| 96 |
|
|
|
| 97 |
|
|
/* Get index corresponding to the given vector (front exiting) */ |
| 98 |
|
|
extern b_ndxf fo_getndx; |
| 99 |
|
|
|
| 100 |
|
|
/* Get projected solid angle for this angle basis index (universal) */ |
| 101 |
|
|
extern b_ohmf io_getohm; |
| 102 |
|
|
|
| 103 |
|
|
/* Get vector for this angle basis index (back incident) */ |
| 104 |
|
|
extern b_vecf bi_getvec; |
| 105 |
|
|
|
| 106 |
|
|
/* Get index corresponding to the vector (back incident) */ |
| 107 |
|
|
extern b_ndxf bi_getndx; |
| 108 |
|
|
|
| 109 |
|
|
/* Get vector for this angle basis index (back exiting) */ |
| 110 |
|
|
extern b_vecf bo_getvec; |
| 111 |
|
|
|
| 112 |
|
|
/* Get index corresponding to the vector (back exiting) */ |
| 113 |
|
|
extern b_ndxf bo_getndx; |
| 114 |
|
|
|
| 115 |
|
|
/* Get vector for this angle basis index (front incident) */ |
| 116 |
|
|
extern b_vecf fi_getvec; |
| 117 |
|
|
|
| 118 |
|
|
/* Get index corresponding to the vector (front incident) */ |
| 119 |
|
|
extern b_ndxf fi_getndx; |
| 120 |
|
|
|
| 121 |
greg |
3.1 |
#ifdef __cplusplus |
| 122 |
|
|
} |
| 123 |
|
|
#endif |
| 124 |
|
|
#endif /* ! _BSDF_M_H_ */ |
