| 7 |
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|
| 8 |
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#include "ray.h" |
| 9 |
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#include "otypes.h" |
| 10 |
+ |
#include "bsdf.h" |
| 11 |
+ |
#include "random.h" |
| 12 |
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|
| 13 |
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#ifdef __cplusplus |
| 14 |
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extern "C" { |
| 19 |
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#define IL_COLAVG 0x4 /* use average color */ |
| 20 |
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#define IL_DATCLB 0x8 /* OK to clobber data file */ |
| 21 |
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|
| 20 |
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/* up directions */ |
| 21 |
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typedef enum { |
| 22 |
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UDzneg=-3, |
| 23 |
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UDyneg=-2, |
| 24 |
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UDxneg=-1, |
| 25 |
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UDunknown=0, |
| 26 |
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UDxpos=1, |
| 27 |
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UDypos=2, |
| 28 |
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UDzpos=3 |
| 29 |
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} UpDir; |
| 30 |
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/* BSDF coordinate calculation routines */ |
| 31 |
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/* vectors always point away from surface */ |
| 32 |
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typedef int b_vecf(FVECT, int, char *); |
| 33 |
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typedef int b_ndxf(FVECT, char *); |
| 34 |
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typedef double b_radf(int, char *); |
| 35 |
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|
| 36 |
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/* Bidirectional Scattering Distribution Function */ |
| 37 |
– |
struct BSDF_data { |
| 38 |
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int ninc; /* number of incoming directions */ |
| 39 |
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int nout; /* number of outgoing directions */ |
| 40 |
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char ib_priv[32]; /* input basis private data */ |
| 41 |
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b_vecf *ib_vec; /* get input vector from index */ |
| 42 |
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b_ndxf *ib_ndx; /* get input index from vector */ |
| 43 |
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b_radf *ib_rad; /* get input radius for index */ |
| 44 |
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char ob_priv[32]; /* output basis private data */ |
| 45 |
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b_vecf *ob_vec; /* get output vector from index */ |
| 46 |
– |
b_ndxf *ob_ndx; /* get output index from vector */ |
| 47 |
– |
b_radf *ob_rad; /* get output radius for index */ |
| 48 |
– |
float *bsdf; /* scattering distribution data */ |
| 49 |
– |
}; /* bidirectional scattering distrib. func. */ |
| 50 |
– |
|
| 22 |
|
struct illum_args { |
| 23 |
|
int flags; /* flags from list above */ |
| 24 |
|
UpDir udir; /* up direction */ |
| 35 |
|
COLOR col; /* computed average color */ |
| 36 |
|
}; /* illum options */ |
| 37 |
|
|
| 67 |
– |
#define getBSDF_incvec(v,b,i) (*(b)->ib_vec)(v,i,(b)->ib_priv) |
| 68 |
– |
#define getBSDF_incndx(b,v) (*(b)->ib_ndx)(v,(b)->ib_priv) |
| 69 |
– |
#define getBSDF_incrad(b,i) (*(b)->ib_rad)(i,(b)->ib_priv) |
| 70 |
– |
#define getBSDF_outvec(v,b,o) (*(b)->ob_vec)(v,o,(b)->ob_priv) |
| 71 |
– |
#define getBSDF_outndx(b,v) (*(b)->ob_ndx)(v,(b)->ob_priv) |
| 72 |
– |
#define getBSDF_outrad(b,o) (*(b)->ob_rad)(o,(b)->ob_priv) |
| 73 |
– |
#define BSDF_visible(b,i,o) (b)->bsdf[(o)*(b)->ninc + (i)] |
| 74 |
– |
|
| 75 |
– |
extern struct BSDF_data *load_BSDF(char *fname); |
| 76 |
– |
extern void free_BSDF(struct BSDF_data *b); |
| 77 |
– |
extern void r_BSDF_incvec(FVECT v, struct BSDF_data *b, int i, |
| 78 |
– |
double rv, MAT4 xm); |
| 79 |
– |
extern void r_BSDF_outvec(FVECT v, struct BSDF_data *b, int o, |
| 80 |
– |
double rv, MAT4 xm); |
| 81 |
– |
extern int getBSDF_xfm(MAT4 xm, FVECT nrm, UpDir ud); |
| 38 |
|
extern void redistribute(struct BSDF_data *b, int nalt, int nazi, |
| 39 |
|
FVECT u, FVECT v, FVECT w, MAT4 xm); |
| 40 |
|
|
| 51 |
|
extern void rayclean(void); |
| 52 |
|
|
| 53 |
|
extern void flatdir(FVECT dv, double alt, double azi); |
| 54 |
+ |
extern int flatindex(FVECT dv, int nalt, int nazi); |
| 55 |
|
|
| 56 |
|
extern int my_default(OBJREC *, struct illum_args *, char *); |
| 57 |
|
extern int my_face(OBJREC *, struct illum_args *, char *); |
| 60 |
|
|
| 61 |
|
extern COLORV * distarr; /* distribution array */ |
| 62 |
|
extern int distsiz; |
| 63 |
+ |
extern COLORV * direct_discount; /* amount to take off direct */ |
| 64 |
|
|
| 65 |
|
extern char *progname; |
| 66 |
|
|
