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/* RCSid $Id: bsdf_m.h,v 3.9 2018/01/05 21:00:24 greg Exp $ */ |
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/* |
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* bsdf_m.h |
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* |
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* Support for BSDF matrices. |
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* Assumes "bsdf.h" already included. |
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* Include after "ezxml.h" for SDloadMtx() declaration. |
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* |
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* Created by Greg Ward on 2/2/11. |
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* |
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*/ |
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|
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#ifndef _BSDF_M_H_ |
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#define _BSDF_M_H_ |
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|
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#ifdef __cplusplus |
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extern "C" { |
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#endif |
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/* Fixed-position coordinate functions */ |
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typedef int b_vecf(FVECT vec, double ndxr, void *c_data); |
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typedef int b_ndxf(const FVECT vec, void *c_data); |
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typedef double b_ohmf(int ndx, void *c_data); |
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|
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/* Rectangular matrix format BSDF */ |
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typedef struct { |
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int ninc; /* number of incoming directions */ |
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int nout; /* number of outgoing directions */ |
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void *ib_priv; /* input basis private data */ |
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b_vecf *ib_vec; /* get input vector from index */ |
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b_ndxf *ib_ndx; /* get input index from vector */ |
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b_ohmf *ib_ohm; /* get input proj. SA for index */ |
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void *ob_priv; /* output basis private data */ |
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b_vecf *ob_vec; /* get output vector from index */ |
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b_ndxf *ob_ndx; /* get output index from vector */ |
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b_ohmf *ob_ohm; /* get output proj. SA for index */ |
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C_CHROMA *chroma; /* chromaticity data */ |
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float bsdf[1]; /* scattering data (extends struct) */ |
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} SDMat; |
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|
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/* Matrix BSDF accessors */ |
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#define mBSDF_incvec(v,b,ix) (*(b)->ib_vec)(v,ix,(b)->ib_priv) |
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#define mBSDF_incndx(b,v) (*(b)->ib_ndx)(v,(b)->ib_priv) |
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#define mBSDF_incohm(b,i) (*(b)->ib_ohm)(i,(b)->ib_priv) |
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#define mBSDF_outvec(v,b,ox) (*(b)->ob_vec)(v,ox,(b)->ob_priv) |
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#define mBSDF_outndx(b,v) (*(b)->ob_ndx)(v,(b)->ob_priv) |
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#define mBSDF_outohm(b,o) (*(b)->ob_ohm)(o,(b)->ob_priv) |
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#define mBSDF_value(b,o,i) (b)->bsdf[(o)*(b)->ninc + (i)] |
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#define mBSDF_chroma(b,o,i) (b)->chroma[(o)*(b)->ninc + (i)] |
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|
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/* Holder for cumulative distribution (sum of BSDF * projSA) */ |
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typedef struct SDMatCDst_s { |
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SD_CDIST_BASE(SDMatCDst_s); /* base fields; must come first */ |
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int indx; /* incident angle index */ |
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void *ob_priv; /* private data for generator */ |
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b_vecf *ob_vec; /* outbound vector generator */ |
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int calen; /* cumulative array length */ |
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unsigned carr[1]; /* cumulative array (extends struct) */ |
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} SDMatCDst; |
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|
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#ifdef _EZXML_H |
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/* Load a set of BSDF matrices from an open XML file */ |
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extern SDError SDloadMtx(SDData *sd, ezxml_t wtl); |
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#endif |
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|
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/* Our matrix handling routines */ |
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extern const SDFunc SDhandleMtx; |
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|
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/******** Klems basis declarations for more intimate access ********/ |
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|
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#define MAXLATS 46 /* maximum number of latitudes */ |
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|
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/* BSDF angle specification */ |
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typedef struct { |
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char name[64]; /* basis name */ |
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int nangles; /* total number of directions */ |
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struct { |
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float tmin; /* starting theta */ |
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int nphis; /* number of phis (0 term) */ |
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} lat[MAXLATS+1]; /* latitudes */ |
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} ANGLE_BASIS; |
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|
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#define MAXABASES 7 /* limit on defined bases */ |
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|
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extern ANGLE_BASIS abase_list[MAXABASES]; |
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|
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extern int nabases; /* current number of defined bases */ |
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|
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extern C_COLOR mtx_RGB_prim[3]; /* matrix RGB primaries */ |
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extern float mtx_RGB_coef[3]; /* corresponding Y coefficients */ |
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|
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/* Get color or grayscale value for BSDF in the given directions */ |
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extern int mBSDF_color(float coef[], const SDMat *b, int i, int o); |
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|
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/* Get vector for this angle basis index (front exiting) */ |
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extern b_vecf fo_getvec; |
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|
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/* Get index corresponding to the given vector (front exiting) */ |
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extern b_ndxf fo_getndx; |
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|
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/* Get projected solid angle for this angle basis index (universal) */ |
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extern b_ohmf io_getohm; |
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/* Get vector for this angle basis index (back incident) */ |
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extern b_vecf bi_getvec; |
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/* Get index corresponding to the vector (back incident) */ |
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extern b_ndxf bi_getndx; |
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/* Get vector for this angle basis index (back exiting) */ |
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extern b_vecf bo_getvec; |
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/* Get index corresponding to the vector (back exiting) */ |
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extern b_ndxf bo_getndx; |
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/* Get vector for this angle basis index (front incident) */ |
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extern b_vecf fi_getvec; |
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|
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/* Get index corresponding to the vector (front incident) */ |
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extern b_ndxf fi_getndx; |
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|
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#ifdef __cplusplus |
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} |
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#endif |
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#endif /* ! _BSDF_M_H_ */ |
