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 */ |
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 |
+ |
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 |
|
*/ |
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 */ |
107 |
|
extern SRCREC *source; /* our source list */ |
108 |
|
extern int nsources; /* the number of sources */ |
109 |
|
|
85 |
– |
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 */ |
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) |