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greg |
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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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* |
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* Created by Greg Ward on 2/2/11. |
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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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#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, int ndx, double randX, 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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/* 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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float bsdf[1]; /* scattering data (extends struct) */ |
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} SDMat; |
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/* Matrix BSDF accessors */ |
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#define mBSDF_incvec(v,b,i) (*(b)->ib_vec)(v,i,(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,o) (*(b)->ob_vec)(v,o,(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,i,o) (b)->bsdf[(o)*(b)->ninc + (i)] |
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/* Holder for cumulative distribution (sum of BSDF * projSA) */ |
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typedef struct { |
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SD_CDIST_BASE; /* 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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/* Load a set of BSDF matrices from an open XML file */ |
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extern SDError SDloadMtx(SDData *sd, ezxml_t fl); |
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/* Our matrix handling routines */ |
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extern SDFunc SDhandleMtx; |
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#ifdef __cplusplus |
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} |
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#endif |
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#endif /* ! _BSDF_M_H_ */ |
