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* G. Ward |
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*/ |
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#ifndef _BSDFREP_H_ |
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#define _BSDFREP_H_ |
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|
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#include "bsdf.h" |
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|
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< |
#define DEBUG 1 |
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#ifdef __cplusplus |
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> |
extern "C" { |
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> |
#endif |
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|
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#ifndef GRIDRES |
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#define GRIDRES (1<<8) /* grid resolution per side */ |
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#define ANG2R(r) (int)((r)*((1<<16)/M_PI)) |
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#define R2ANG(c) (((c)+.5)*(M_PI/(1<<16))) |
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|
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< |
typedef struct { |
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float vsum; /* DSF sum */ |
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unsigned int nval; /* number of values in sum */ |
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/* moderated cosine factor */ |
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> |
#define COSF(z) (fabs(z)*0.98 + 0.02) |
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> |
|
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typedef union { |
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> |
struct { |
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> |
float v; /* DSF sum */ |
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unsigned int n; /* number of values in sum */ |
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> |
} sum; /* sum for averaging */ |
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> |
float val[2]; /* comparison values */ |
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} GRIDVAL; /* grid value */ |
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typedef struct { |
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|
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/* BSDF value for boundary regions */ |
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extern double bsdf_min; |
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extern double bsdf_spec_peak; |
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extern double bsdf_spec_rad; |
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|
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/* processed incident DSF measurements */ |
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extern RBFNODE *dsf_list; |
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/* Compute grid position from normalized input/output vector */ |
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extern void pos_from_vec(int pos[2], const FVECT vec); |
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|
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< |
/* Evaluate RBF for DSF at the given normalized outgoing direction */ |
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> |
/* Evaluate BSDF at the given normalized outgoing direction */ |
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extern double eval_rbfrep(const RBFNODE *rp, const FVECT outvec); |
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|
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/* Insert a new directional scattering function in our global list */ |
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/* Find edge(s) for interpolating the given vector, applying symmetry */ |
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extern int get_interp(MIGRATION *miga[3], FVECT invec); |
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|
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/* Return single-lobe specular RBF for the given incident direction */ |
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extern RBFNODE * def_rbf_spec(const FVECT invec); |
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|
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/* Advect and allocate new RBF along edge (internal call) */ |
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extern RBFNODE * e_advect_rbf(const MIGRATION *mig, |
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const FVECT invec, int lobe_lim); |
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|
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+ |
/* Compute distance between two RBF lobes (internal call) */ |
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extern double lobe_distance(RBFVAL *rbf1, RBFVAL *rbf2); |
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|
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/* Compute mass transport plan (internal call) */ |
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extern void plan_transport(MIGRATION *mig); |
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|
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/* Partially advect between recorded incident angles and allocate new RBF */ |
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extern RBFNODE * advect_rbf(const FVECT invec, int lobe_lim); |
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|
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#ifdef __cplusplus |
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} |
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#endif |
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#endif /* _BSDFREP_H_ */ |
