1 |
greg |
3.8 |
/* RCSid $Id: bsdf_t.h,v 3.7 2011/04/27 20:03:25 greg Exp $ */ |
2 |
greg |
3.1 |
/* |
3 |
|
|
* bsdf_t.h |
4 |
|
|
* |
5 |
greg |
3.4 |
* Support for variable-resolution BSDF trees. |
6 |
|
|
* Assumes "bsdf.h" already included. |
7 |
|
|
* Include after "ezxml.h" for SDloadTre() declaration. |
8 |
greg |
3.1 |
* |
9 |
|
|
* Created by Greg Ward on 2/2/11. |
10 |
|
|
* |
11 |
|
|
*/ |
12 |
|
|
|
13 |
|
|
#ifndef _BSDF_T_H_ |
14 |
|
|
#define _BSDF_T_H_ |
15 |
|
|
|
16 |
|
|
#ifdef __cplusplus |
17 |
|
|
extern "C" { |
18 |
|
|
#endif |
19 |
|
|
|
20 |
|
|
#define SD_MAXDIM 4 /* maximum expected # dimensions */ |
21 |
|
|
|
22 |
|
|
/* Basic node structure for variable-resolution BSDF data */ |
23 |
|
|
typedef struct SDNode_s { |
24 |
|
|
short ndim; /* number of dimensions */ |
25 |
|
|
short log2GR; /* log(2) of grid resolution (< 0 for tree) */ |
26 |
|
|
union { |
27 |
|
|
struct SDNode_s *t[1]; /* subtree pointers */ |
28 |
|
|
float v[1]; /* scattering value(s) */ |
29 |
|
|
} u; /* subtrees or values (extends struct) */ |
30 |
|
|
} SDNode; |
31 |
|
|
|
32 |
greg |
3.7 |
#define SD_UFRONT 0x1 /* flag for BSDF uses front side */ |
33 |
|
|
#define SD_UBACK 0x2 /* flag for BSDF uses back side */ |
34 |
|
|
#define SD_XMIT 0x3 /* combine the two for transmission */ |
35 |
|
|
|
36 |
greg |
3.6 |
/* Variable-resolution BSDF holder */ |
37 |
|
|
typedef struct { |
38 |
greg |
3.7 |
int sidef; /* transmitted component? */ |
39 |
greg |
3.6 |
SDNode *st; /* BSDF tree */ |
40 |
|
|
} SDTre; |
41 |
|
|
|
42 |
|
|
/* Holder for cumulative distribution (sum of BSDF * projSA) */ |
43 |
|
|
typedef struct { |
44 |
|
|
SD_CDIST_BASE; /* base fields; must come first */ |
45 |
|
|
double clim[2][2]; /* input coordinate limits */ |
46 |
|
|
double max_psa; /* maximum projected solid angle */ |
47 |
greg |
3.8 |
short sidef; /* which side(s) to use */ |
48 |
|
|
short isodist; /* isotropic distribution? */ |
49 |
greg |
3.6 |
int calen; /* cumulative array length */ |
50 |
|
|
struct { |
51 |
|
|
unsigned hndx; /* hilbert index */ |
52 |
|
|
unsigned cuml; /* cumulative value */ |
53 |
|
|
} carr[1]; /* cumulative array (extends struct) */ |
54 |
|
|
} SDTreCDst; |
55 |
|
|
|
56 |
greg |
3.4 |
#ifdef _EZXML_H |
57 |
greg |
3.1 |
/* Load a variable-resolution BSDF tree from an open XML file */ |
58 |
greg |
3.3 |
extern SDError SDloadTre(SDData *sd, ezxml_t wtl); |
59 |
greg |
3.4 |
#endif |
60 |
greg |
3.1 |
|
61 |
|
|
/* Our matrix handling routines */ |
62 |
greg |
3.5 |
extern SDFunc SDhandleTre; |
63 |
greg |
3.1 |
|
64 |
|
|
#ifdef __cplusplus |
65 |
|
|
} |
66 |
|
|
#endif |
67 |
|
|
#endif /* ! _BSDF_T_H_ */ |