| 16 |
|
#define SSPOT 010 /* source spotlight flag */ |
| 17 |
|
#define SVIRTUAL 020 /* source virtual flag */ |
| 18 |
|
#define SFLAT 040 /* source flat flag */ |
| 19 |
< |
#define SFOLLOW 0100 /* source follow path flag */ |
| 19 |
> |
#define SCYL 0100 /* source cylindrical flag */ |
| 20 |
> |
#define SFOLLOW 0200 /* source follow path flag */ |
| 21 |
|
|
| 22 |
|
typedef struct { |
| 23 |
|
FVECT aim; /* aim direction or center */ |
| 28 |
|
typedef struct { |
| 29 |
|
int sflags; /* source flags */ |
| 30 |
|
FVECT sloc; /* direction or position of source */ |
| 31 |
< |
FVECT snorm; /* surface normal of flat source */ |
| 32 |
< |
float ss; /* tangent or disk radius */ |
| 33 |
< |
float ss2; /* domega or projected area */ |
| 31 |
> |
FVECT ss[3]; /* source dimension vectors, U, V, and W */ |
| 32 |
> |
float srad; /* maximum source radius */ |
| 33 |
> |
float ss2; /* solid angle or projected area */ |
| 34 |
|
struct { |
| 35 |
|
float prox; /* proximity */ |
| 36 |
|
SPOT *s; /* spot */ |
| 37 |
|
} sl; /* localized source information */ |
| 38 |
|
union { |
| 39 |
|
int success; /* successes - AIMREQT*failures */ |
| 40 |
< |
int svnext; /* next source to aim for */ |
| 40 |
> |
struct { |
| 41 |
> |
short pn; /* projection number */ |
| 42 |
> |
short sn; /* next source to aim for */ |
| 43 |
> |
} sv; /* virtual source */ |
| 44 |
|
} sa; /* source aiming information */ |
| 45 |
|
long ntests, nhits; /* shadow tests and hits */ |
| 46 |
|
OBJREC *so; /* source destination object */ |
| 47 |
|
} SRCREC; /* light source */ |
| 48 |
|
|
| 49 |
+ |
#define MAXSPART 64 /* maximum partitions per source */ |
| 50 |
+ |
|
| 51 |
+ |
#define SU 0 /* U vector or partition */ |
| 52 |
+ |
#define SV 1 /* V vector or partition */ |
| 53 |
+ |
#define SW 2 /* W vector or partition */ |
| 54 |
+ |
#define S0 3 /* leaf partition */ |
| 55 |
+ |
|
| 56 |
+ |
#define snorm ss[SW] /* normal vector for flat source */ |
| 57 |
+ |
|
| 58 |
|
typedef struct { |
| 59 |
< |
FVECT dir; /* source direction */ |
| 60 |
< |
float dom; /* domega for source */ |
| 61 |
< |
COLOR val; /* contribution */ |
| 62 |
< |
} CONTRIB; /* direct contribution */ |
| 59 |
> |
int sn; /* source number */ |
| 60 |
> |
short np; /* number of partitions */ |
| 61 |
> |
short sp; /* this partition number */ |
| 62 |
> |
double dom; /* solid angle of partition */ |
| 63 |
> |
unsigned char spt[MAXSPART/2]; /* source partitioning */ |
| 64 |
> |
} SRCINDEX; /* source index structure */ |
| 65 |
|
|
| 66 |
+ |
#define initsrcindex(s) ((s)->sn = (s)->sp = -1, (s)->np = 0) |
| 67 |
+ |
|
| 68 |
+ |
#define clrpart(pt) bzero((char *)(pt), MAXSPART/2) |
| 69 |
+ |
#define setpart(pt,i,v) ((pt)[(i)>>2] |= (v)<<(((i)&3)<<1)) |
| 70 |
+ |
#define spart(pt,pi) ((pt)[(pi)>>2] >> (((pi)&3)<<1) & 3) |
| 71 |
+ |
|
| 72 |
+ |
/* |
| 73 |
+ |
* Special support functions for sources |
| 74 |
+ |
*/ |
| 75 |
+ |
|
| 76 |
+ |
/* |
| 77 |
+ |
* Virtual source materials must define the following. |
| 78 |
+ |
* |
| 79 |
+ |
* vproj(pm, op, sp, i) Compute i'th virtual projection |
| 80 |
+ |
* of source sp in object op and assign |
| 81 |
+ |
* the 4x4 transformation matrix pm. |
| 82 |
+ |
* Return 1 on success, 0 if no i'th projection. |
| 83 |
+ |
* |
| 84 |
+ |
* nproj The number of projections. The value of |
| 85 |
+ |
* i passed to vproj runs from 0 to nproj-1. |
| 86 |
+ |
*/ |
| 87 |
+ |
|
| 88 |
|
typedef struct { |
| 89 |
< |
int sno; /* source number */ |
| 90 |
< |
float brt; /* brightness (for comparison) */ |
| 91 |
< |
} CNTPTR; /* contribution pointer */ |
| 89 |
> |
int (*vproj)(); /* project virtual sources */ |
| 90 |
> |
int nproj; /* number of possible projections */ |
| 91 |
> |
} VSMATERIAL; /* virtual source material functions */ |
| 92 |
|
|
| 93 |
+ |
typedef struct { |
| 94 |
+ |
int (*setsrc)(); /* set light source for object */ |
| 95 |
+ |
int (*partit)(); /* partition light source object */ |
| 96 |
+ |
double (*getpleq)(); /* plane equation for surface */ |
| 97 |
+ |
double (*getdisk)(); /* maximum disk for surface */ |
| 98 |
+ |
} SOBJECT; /* source object functions */ |
| 99 |
+ |
|
| 100 |
+ |
typedef union { |
| 101 |
+ |
VSMATERIAL *mf; /* material functions */ |
| 102 |
+ |
SOBJECT *of; /* object functions */ |
| 103 |
+ |
} SRCFUNC; /* source functions */ |
| 104 |
+ |
|
| 105 |
+ |
extern SRCFUNC sfun[]; /* source dispatch table */ |
| 106 |
+ |
|
| 107 |
|
extern SRCREC *source; /* our source list */ |
| 108 |
|
extern int nsources; /* the number of sources */ |
| 109 |
|
|
| 110 |
< |
extern double srcray(); /* ray to source */ |
| 110 |
> |
extern int srcvalue(); /* compute source value w/o shadows */ |
| 111 |
> |
extern double nextssamp(); /* get next source sample location */ |
| 112 |
> |
extern double scylform(); /* cosine to axis of cylinder */ |
| 113 |
|
|
| 114 |
+ |
#define sflatform(sn,dir) -DOT(source[sn].snorm, dir) |
| 115 |
+ |
|
| 116 |
+ |
extern OBJREC *vsmaterial(); /* virtual source material */ |
| 117 |
+ |
|
| 118 |
+ |
extern double intercircle(); /* intersect two circles */ |
| 119 |
+ |
extern double spotdisk(); /* intersecting disk for spot */ |
| 120 |
+ |
extern double beamdisk(); /* intersecting disk for beam */ |
| 121 |
+ |
|
| 122 |
|
extern SPOT *makespot(); /* make spotlight */ |
| 123 |
|
|
| 124 |
< |
extern SRCREC *newsource(); /* allocate new source */ |
| 124 |
> |
extern double dstrsrc; /* source distribution amount */ |
| 125 |
> |
extern double shadthresh; /* relative shadow threshold */ |
| 126 |
> |
extern double shadcert; /* shadow testing certainty */ |
| 127 |
> |
extern double srcsizerat; /* max. ratio of source size/dist. */ |
| 128 |
> |
extern int directrelay; /* maximum number of source relays */ |
| 129 |
> |
extern int vspretest; /* virtual source pretest density */ |
| 130 |
> |
extern int directvis; /* sources visible? */ |
| 131 |
> |
|
| 132 |
> |
#define getplaneq(c,o) (*sfun[(o)->otype].of->getpleq)(c,o) |
| 133 |
> |
#define getmaxdisk(c,o) (*sfun[(o)->otype].of->getdisk)(c,o) |
| 134 |
> |
#define setsource(s,o) (*sfun[(o)->otype].of->setsrc)(s,o) |
