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* 8/20/85 |
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*/ |
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#define AIMREQT 100 /* required aim success/failure */ |
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|
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#define SDISTANT 01 /* source distant flag */ |
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#define SSKIP 02 /* source skip flag */ |
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#define SPROX 04 /* source proximity flag */ |
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#define SSPOT 010 /* source spotlight flag */ |
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#define SVIRTUAL 020 /* source virtual flag */ |
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#define SFLAT 040 /* source flat flag */ |
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#define SCYL 0100 /* source cylindrical flag */ |
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#define SFOLLOW 0200 /* source follow path flag */ |
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|
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typedef struct { |
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< |
float siz; /* output solid angle */ |
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> |
FVECT aim; /* aim direction or center */ |
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> |
float siz; /* output solid angle or area */ |
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float flen; /* focal length */ |
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FVECT aim; /* aim direction */ |
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} SPOT; /* spotlight */ |
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typedef struct { |
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< |
short sflags; /* source flags */ |
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> |
int sflags; /* source flags */ |
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FVECT sloc; /* direction or position of source */ |
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< |
float ss; /* tangent or disk radius */ |
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< |
float ss2; /* domega or projected area */ |
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< |
union { |
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> |
FVECT ss[3]; /* source dimension vectors, U, V, and W */ |
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> |
float srad; /* maximum source radius */ |
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> |
float ss2; /* solid angle or projected area */ |
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struct { |
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float prox; /* proximity */ |
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SPOT *s; /* spot */ |
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} sl; /* localized source information */ |
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< |
OBJREC *so; /* source object */ |
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< |
} SOURCE; /* light source */ |
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> |
union { |
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> |
int success; /* successes - AIMREQT*failures */ |
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> |
struct { |
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> |
short pn; /* projection number */ |
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> |
short sn; /* next source to aim for */ |
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> |
} sv; /* virtual source */ |
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> |
} sa; /* source aiming information */ |
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> |
long ntests, nhits; /* shadow tests and hits */ |
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> |
OBJREC *so; /* source destination object */ |
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> |
} SRCREC; /* light source */ |
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|
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< |
#define MAXSOURCE 512 /* maximum # of sources */ |
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> |
#define MAXSPART 64 /* maximum partitions per source */ |
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|
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< |
extern SOURCE srcval[MAXSOURCE]; /* our source list */ |
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> |
#define SU 0 /* U vector or partition */ |
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> |
#define SV 1 /* V vector or partition */ |
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> |
#define SW 2 /* W vector or partition */ |
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> |
#define S0 3 /* leaf partition */ |
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> |
|
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> |
#define snorm ss[SW] /* normal vector for flat source */ |
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> |
|
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> |
typedef struct { |
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> |
int sn; /* source number */ |
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> |
short np; /* number of partitions */ |
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> |
short sp; /* this partition number */ |
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> |
double dom; /* solid angle of partition */ |
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> |
unsigned char spt[MAXSPART/2]; /* source partitioning */ |
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> |
} SRCINDEX; /* source index structure */ |
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> |
|
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> |
#define initsrcindex(s) ((s)->sn = (s)->sp = -1, (s)->np = 0) |
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> |
|
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> |
#define clrpart(pt) bzero((char *)(pt), MAXSPART/2) |
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> |
#define setpart(pt,i,v) ((pt)[(i)>>2] |= (v)<<(((i)&3)<<1)) |
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> |
#define spart(pt,pi) ((pt)[(pi)>>2] >> (((pi)&3)<<1) & 3) |
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> |
|
| 72 |
> |
/* |
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> |
* Special support functions for sources |
| 74 |
> |
*/ |
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> |
|
| 76 |
> |
/* |
| 77 |
> |
* Virtual source materials must define the following. |
| 78 |
> |
* |
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> |
* vproj(pm, op, sp, i) Compute i'th virtual projection |
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> |
* of source sp in object op and assign |
| 81 |
> |
* the 4x4 transformation matrix pm. |
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> |
* Return 1 on success, 0 if no i'th projection. |
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> |
* |
| 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 (*vproj)(); /* project virtual sources */ |
| 90 |
> |
int nproj; /* number of possible projections */ |
| 91 |
> |
} VSMATERIAL; /* virtual source material functions */ |
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> |
|
| 93 |
> |
typedef struct { |
| 94 |
> |
int (*setsrc)(); /* set light source for object */ |
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> |
int (*partit)(); /* partition light source object */ |
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> |
double (*getpleq)(); /* plane equation for surface */ |
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> |
double (*getdisk)(); /* maximum disk for surface */ |
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> |
} SOBJECT; /* source object functions */ |
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> |
|
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> |
typedef union { |
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> |
VSMATERIAL *mf; /* material functions */ |
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> |
SOBJECT *of; /* object functions */ |
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> |
} SRCFUNC; /* source functions */ |
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> |
|
| 105 |
> |
extern SRCFUNC sfun[]; /* source dispatch table */ |
| 106 |
> |
|
| 107 |
> |
extern SRCREC *source; /* our source list */ |
| 108 |
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extern int nsources; /* the number of sources */ |
| 109 |
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|
| 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 |
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|
| 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 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 directinvis; /* sources invisible? */ |
| 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) |
