| 1 |
/* RCSid $Id: bsdf_t.h,v 3.3 2011/02/19 01:48:59 greg Exp $ */ |
| 2 |
/* |
| 3 |
* bsdf_t.h |
| 4 |
* |
| 5 |
* Support for variable-resolution BSDF trees. |
| 6 |
* Assumes "bsdf.h" already included. |
| 7 |
* Include after "ezxml.h" for SDloadTre() declaration. |
| 8 |
* |
| 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 |
#ifdef _EZXML_H |
| 33 |
/* Load a variable-resolution BSDF tree from an open XML file */ |
| 34 |
extern SDError SDloadTre(SDData *sd, ezxml_t wtl); |
| 35 |
#endif |
| 36 |
|
| 37 |
/* Our matrix handling routines */ |
| 38 |
extern const SDFunc SDhandleTre; |
| 39 |
|
| 40 |
#ifdef __cplusplus |
| 41 |
} |
| 42 |
#endif |
| 43 |
#endif /* ! _BSDF_T_H_ */ |
