| 42 |
|
OBJREC *so; /* source destination object */ |
| 43 |
|
} SRCREC; /* light source */ |
| 44 |
|
|
| 45 |
+ |
/* |
| 46 |
+ |
* Special support functions for sources |
| 47 |
+ |
*/ |
| 48 |
+ |
|
| 49 |
+ |
/* |
| 50 |
+ |
* Virtual source materials must define the following. |
| 51 |
+ |
* |
| 52 |
+ |
* vproj(pm, op, sp, i) Compute i'th virtual projection |
| 53 |
+ |
* of source sp in object op and assign |
| 54 |
+ |
* the 4x4 transformation matrix pm. |
| 55 |
+ |
* Return 1 on success, 0 if no i'th projection. |
| 56 |
+ |
* |
| 57 |
+ |
* nproj The number of projections. The value of |
| 58 |
+ |
* i passed to vproj runs from 0 to nproj-1. |
| 59 |
+ |
*/ |
| 60 |
+ |
|
| 61 |
|
typedef struct { |
| 62 |
< |
FVECT dir; /* source direction */ |
| 63 |
< |
COLOR coef; /* material coefficient */ |
| 64 |
< |
COLOR val; /* contribution */ |
| 49 |
< |
} CONTRIB; /* direct contribution */ |
| 62 |
> |
int (*vproj)(); /* project virtual sources */ |
| 63 |
> |
int nproj; /* number of possible projections */ |
| 64 |
> |
} VSMATERIAL; /* virtual source material functions */ |
| 65 |
|
|
| 66 |
|
typedef struct { |
| 67 |
< |
int sno; /* source number */ |
| 68 |
< |
float brt; /* brightness (for comparison) */ |
| 69 |
< |
} CNTPTR; /* contribution pointer */ |
| 67 |
> |
int (*setsrc)(); /* set light source for object */ |
| 68 |
> |
double (*getpleq)(); /* plane equation for surface */ |
| 69 |
> |
double (*getdisk)(); /* maximum disk for surface */ |
| 70 |
> |
} SOBJECT; /* source object functions */ |
| 71 |
|
|
| 72 |
+ |
typedef union { |
| 73 |
+ |
VSMATERIAL *mf; /* material functions */ |
| 74 |
+ |
SOBJECT *of; /* object functions */ |
| 75 |
+ |
} SRCFUNC; /* source functions */ |
| 76 |
+ |
|
| 77 |
+ |
extern SRCFUNC sfun[]; /* source dispatch table */ |
| 78 |
+ |
|
| 79 |
|
extern SRCREC *source; /* our source list */ |
| 80 |
|
extern int nsources; /* the number of sources */ |
| 81 |
|
|
| 82 |
|
extern double srcray(); /* ray to source */ |
| 83 |
+ |
extern int srcvalue(); /* compute source value w/o shadows */ |
| 84 |
|
|
| 85 |
+ |
extern double intercircle(); /* intersect two circles */ |
| 86 |
+ |
extern double spotdisk(); /* intersecting disk for spot */ |
| 87 |
+ |
extern double beamdisk(); /* intersecting disk for beam */ |
| 88 |
+ |
|
| 89 |
|
extern SPOT *makespot(); /* make spotlight */ |
| 90 |
|
|
| 91 |
< |
extern SRCREC *newsource(); /* allocate new source */ |
| 91 |
> |
extern double dstrsrc; /* source distribution amount */ |
| 92 |
> |
extern double shadthresh; /* relative shadow threshold */ |
| 93 |
> |
extern double shadcert; /* shadow testing certainty */ |
| 94 |
> |
extern int directrelay; /* maximum number of source relays */ |
| 95 |
> |
extern int vspretest; /* virtual source pretest density */ |
| 96 |
> |
|
| 97 |
> |
#define getplaneq(c,o) (*sfun[(o)->otype].of->getpleq)(c,o) |
| 98 |
> |
#define getmaxdisk(c,o) (*sfun[(o)->otype].of->getdisk)(c,o) |
| 99 |
> |
#define setsource(s,o) (*sfun[(o)->otype].of->setsrc)(s,o) |
