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root/radiance/ray/src/rt/source.h
Revision: 2.9
Committed: Fri Jun 27 06:53:23 2003 UTC (20 years, 10 months ago) by greg
Content type: text/plain
Branch: MAIN
Changes since 2.8: +1 -4 lines
Log Message: 
Broke standard.h into rtio.h, rterror.h, rtmath.h, and rtmisc.h

File Contents

# User Rev Content
1 greg 2.9 /* RCSid $Id: source.h,v 2.8 2003/06/24 15:37:01 greg Exp $ */
2 greg 1.1 /*
3     * source.h - header file for ray tracing sources.
4     *
5 greg 2.5 * Include after ray.h
6     */
7 schorsch 2.7 #ifndef _RAD_SOURCE_H_
8     #define _RAD_SOURCE_H_
9     #ifdef __cplusplus
10     extern "C" {
11     #endif
12 greg 1.1
13 greg 1.6 #define AIMREQT 100 /* required aim success/failure */
14    
15 greg 1.1 #define SDISTANT 01 /* source distant flag */
16     #define SSKIP 02 /* source skip flag */
17 greg 1.3 #define SPROX 04 /* source proximity flag */
18     #define SSPOT 010 /* source spotlight flag */
19 greg 1.6 #define SVIRTUAL 020 /* source virtual flag */
20     #define SFLAT 040 /* source flat flag */
21 greg 1.14 #define SCYL 0100 /* source cylindrical flag */
22     #define SFOLLOW 0200 /* source follow path flag */
23 greg 1.1
24     typedef struct {
25 greg 1.6 FVECT aim; /* aim direction or center */
26     float siz; /* output solid angle or area */
27 greg 2.4 float flen; /* focal length (negative if distant source) */
28 greg 1.3 } SPOT; /* spotlight */
29    
30     typedef struct {
31 greg 1.6 int sflags; /* source flags */
32 greg 1.1 FVECT sloc; /* direction or position of source */
33 greg 1.14 FVECT ss[3]; /* source dimension vectors, U, V, and W */
34     float srad; /* maximum source radius */
35     float ss2; /* solid angle or projected area */
36 greg 1.6 struct {
37 greg 1.3 float prox; /* proximity */
38     SPOT *s; /* spot */
39     } sl; /* localized source information */
40 greg 1.6 union {
41 greg 2.3 long success; /* successes - AIMREQT*failures */
42 greg 1.12 struct {
43     short pn; /* projection number */
44 greg 2.3 int sn; /* next source to aim for */
45 greg 1.12 } sv; /* virtual source */
46 greg 1.6 } sa; /* source aiming information */
47 greg 2.8 unsigned long
48     ntests, nhits; /* shadow tests and hits */
49 greg 1.6 OBJREC *so; /* source destination object */
50 greg 1.2 } SRCREC; /* light source */
51 greg 1.1
52 greg 1.15 #define MAXSPART 64 /* maximum partitions per source */
53 greg 1.14
54     #define SU 0 /* U vector or partition */
55     #define SV 1 /* V vector or partition */
56     #define SW 2 /* W vector or partition */
57     #define S0 3 /* leaf partition */
58    
59     #define snorm ss[SW] /* normal vector for flat source */
60    
61     typedef struct {
62     int sn; /* source number */
63     short np; /* number of partitions */
64     short sp; /* this partition number */
65     double dom; /* solid angle of partition */
66     unsigned char spt[MAXSPART/2]; /* source partitioning */
67     } SRCINDEX; /* source index structure */
68    
69     #define initsrcindex(s) ((s)->sn = (s)->sp = -1, (s)->np = 0)
70    
71     #define clrpart(pt) bzero((char *)(pt), MAXSPART/2)
72     #define setpart(pt,i,v) ((pt)[(i)>>2] |= (v)<<(((i)&3)<<1))
73     #define spart(pt,pi) ((pt)[(pi)>>2] >> (((pi)&3)<<1) & 3)
74    
75 greg 1.8 /*
76     * Special support functions for sources
77     */
78    
79     /*
80 greg 1.10 * Virtual source materials must define the following.
81 greg 1.8 *
82     * vproj(pm, op, sp, i) Compute i'th virtual projection
83     * of source sp in object op and assign
84     * the 4x4 transformation matrix pm.
85     * Return 1 on success, 0 if no i'th projection.
86     *
87     * nproj The number of projections. The value of
88     * i passed to vproj runs from 0 to nproj-1.
89     */
90    
91 greg 1.2 typedef struct {
92 greg 1.8 int (*vproj)(); /* project virtual sources */
93     int nproj; /* number of possible projections */
94     } VSMATERIAL; /* virtual source material functions */
95 greg 1.4
96     typedef struct {
97 greg 2.5 void (*setsrc)(); /* set light source for object */
98     void (*partit)(); /* partition light source object */
99 greg 1.8 double (*getpleq)(); /* plane equation for surface */
100     double (*getdisk)(); /* maximum disk for surface */
101     } SOBJECT; /* source object functions */
102 greg 1.1
103 greg 1.8 typedef union {
104     VSMATERIAL *mf; /* material functions */
105     SOBJECT *of; /* object functions */
106     } SRCFUNC; /* source functions */
107    
108     extern SRCFUNC sfun[]; /* source dispatch table */
109    
110 greg 1.2 extern SRCREC *source; /* our source list */
111 greg 1.1 extern int nsources; /* the number of sources */
112    
113 greg 1.14 #define sflatform(sn,dir) -DOT(source[sn].snorm, dir)
114    
115 greg 1.11 #define getplaneq(c,o) (*sfun[(o)->otype].of->getpleq)(c,o)
116     #define getmaxdisk(c,o) (*sfun[(o)->otype].of->getdisk)(c,o)
117     #define setsource(s,o) (*sfun[(o)->otype].of->setsrc)(s,o)
118 greg 2.5
119     /* defined in source.c */
120     extern void marksources(void);
121     extern void freesources(void);
122     extern int srcray(RAY *sr, RAY *r, SRCINDEX *si);
123     extern void srcvalue(RAY *r);
124     extern int sourcehit(RAY *r);
125     extern void direct(RAY *r, void (*f)(), char *p);
126     extern void srcscatter(RAY *r);
127     extern int m_light(OBJREC *m, RAY *r);
128     /* defined in srcsamp.c */
129     extern double nextssamp(RAY *r, SRCINDEX *si);
130     extern int skipparts(int ct[3], int sz[3], int pp[2], unsigned char *pt);
131     extern void nopart(SRCINDEX *si, RAY *r);
132     extern void cylpart(SRCINDEX *si, RAY *r);
133     extern void flatpart(SRCINDEX *si, RAY *r);
134     extern double scylform(int sn, FVECT dir);
135     /* defined in srcsupp.c */
136     extern void initstypes(void);
137     extern int newsource(void);
138     extern void setflatss(SRCREC *src);
139     extern void fsetsrc(SRCREC *src, OBJREC *so);
140     extern void ssetsrc(SRCREC *src, OBJREC *so);
141     extern void sphsetsrc(SRCREC *src, OBJREC *so);
142     extern void rsetsrc(SRCREC *src, OBJREC *so);
143     extern void cylsetsrc(SRCREC *src, OBJREC *so);
144     extern SPOT *makespot(OBJREC *m);
145     extern int spotout(RAY *r, SPOT *s);
146     extern double fgetmaxdisk(FVECT ocent, OBJREC *op);
147     extern double rgetmaxdisk(FVECT ocent, OBJREC *op);
148     extern double fgetplaneq(FVECT nvec, OBJREC *op);
149     extern double rgetplaneq(FVECT nvec, OBJREC *op);
150     extern int commonspot(SPOT *sp1, SPOT *sp2, FVECT org);
151     extern int commonbeam(SPOT *sp1, SPOT *sp2, FVECT org);
152     extern int checkspot(SPOT *sp, FVECT nrm);
153     extern double spotdisk(FVECT oc, OBJREC *op, SPOT *sp, FVECT pos);
154     extern double beamdisk(FVECT oc, OBJREC *op, SPOT *sp, FVECT dir);
155     extern double intercircle(FVECT cc, FVECT c1, FVECT c2,
156     double r1s, double r2s);
157     /* defined in virtuals.c */
158     extern void markvirtuals(void);
159     extern void addvirtuals(int sn, int nr);
160     extern void vproject(OBJREC *o, int sn, int n);
161     extern OBJREC *vsmaterial(OBJREC *o);
162     extern int makevsrc(OBJREC *op, int sn, MAT4 pm);
163     extern double getdisk(FVECT oc, OBJREC *op, int sn);
164     extern int vstestvis(int f, OBJREC *o, FVECT oc, double or2, int sn);
165     extern void virtverb(int sn, FILE *fp);
166    
167 schorsch 2.7
168     #ifdef __cplusplus
169     }
170 greg 2.5 #endif
171 schorsch 2.7 #endif /* _RAD_SOURCE_H_ */
172