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root/radiance/ray/src/rt/source.h
Revision: 2.10
Committed: Mon Jun 30 14:59:13 2003 UTC (20 years, 10 months ago) by schorsch
Content type: text/plain
Branch: MAIN
Changes since 2.9: +4 -2 lines
Log Message: 
Replaced most outdated BSD function calls with their posix equivalents, and cleaned up a few other platform dependencies.

File Contents

# User Rev Content
1 schorsch 2.10 /* RCSid $Id: source.h,v 2.9 2003/06/27 06:53:23 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 schorsch 2.10 #include <string.h>
14    
15 greg 1.6 #define AIMREQT 100 /* required aim success/failure */
16    
17 greg 1.1 #define SDISTANT 01 /* source distant flag */
18     #define SSKIP 02 /* source skip flag */
19 greg 1.3 #define SPROX 04 /* source proximity flag */
20     #define SSPOT 010 /* source spotlight flag */
21 greg 1.6 #define SVIRTUAL 020 /* source virtual flag */
22     #define SFLAT 040 /* source flat flag */
23 greg 1.14 #define SCYL 0100 /* source cylindrical flag */
24     #define SFOLLOW 0200 /* source follow path flag */
25 greg 1.1
26     typedef struct {
27 greg 1.6 FVECT aim; /* aim direction or center */
28     float siz; /* output solid angle or area */
29 greg 2.4 float flen; /* focal length (negative if distant source) */
30 greg 1.3 } SPOT; /* spotlight */
31    
32     typedef struct {
33 greg 1.6 int sflags; /* source flags */
34 greg 1.1 FVECT sloc; /* direction or position of source */
35 greg 1.14 FVECT ss[3]; /* source dimension vectors, U, V, and W */
36     float srad; /* maximum source radius */
37     float ss2; /* solid angle or projected area */
38 greg 1.6 struct {
39 greg 1.3 float prox; /* proximity */
40     SPOT *s; /* spot */
41     } sl; /* localized source information */
42 greg 1.6 union {
43 greg 2.3 long success; /* successes - AIMREQT*failures */
44 greg 1.12 struct {
45     short pn; /* projection number */
46 greg 2.3 int sn; /* next source to aim for */
47 greg 1.12 } sv; /* virtual source */
48 greg 1.6 } sa; /* source aiming information */
49 greg 2.8 unsigned long
50     ntests, nhits; /* shadow tests and hits */
51 greg 1.6 OBJREC *so; /* source destination object */
52 greg 1.2 } SRCREC; /* light source */
53 greg 1.1
54 greg 1.15 #define MAXSPART 64 /* maximum partitions per source */
55 greg 1.14
56     #define SU 0 /* U vector or partition */
57     #define SV 1 /* V vector or partition */
58     #define SW 2 /* W vector or partition */
59     #define S0 3 /* leaf partition */
60    
61     #define snorm ss[SW] /* normal vector for flat source */
62    
63     typedef struct {
64     int sn; /* source number */
65     short np; /* number of partitions */
66     short sp; /* this partition number */
67     double dom; /* solid angle of partition */
68     unsigned char spt[MAXSPART/2]; /* source partitioning */
69     } SRCINDEX; /* source index structure */
70    
71     #define initsrcindex(s) ((s)->sn = (s)->sp = -1, (s)->np = 0)
72    
73 schorsch 2.10 #define clrpart(pt) memset((char *)(pt), '\0', MAXSPART/2)
74 greg 1.14 #define setpart(pt,i,v) ((pt)[(i)>>2] |= (v)<<(((i)&3)<<1))
75     #define spart(pt,pi) ((pt)[(pi)>>2] >> (((pi)&3)<<1) & 3)
76    
77 greg 1.8 /*
78     * Special support functions for sources
79     */
80    
81     /*
82 greg 1.10 * Virtual source materials must define the following.
83 greg 1.8 *
84     * vproj(pm, op, sp, i) Compute i'th virtual projection
85     * of source sp in object op and assign
86     * the 4x4 transformation matrix pm.
87     * Return 1 on success, 0 if no i'th projection.
88     *
89     * nproj The number of projections. The value of
90     * i passed to vproj runs from 0 to nproj-1.
91     */
92    
93 greg 1.2 typedef struct {
94 greg 1.8 int (*vproj)(); /* project virtual sources */
95     int nproj; /* number of possible projections */
96     } VSMATERIAL; /* virtual source material functions */
97 greg 1.4
98     typedef struct {
99 greg 2.5 void (*setsrc)(); /* set light source for object */
100     void (*partit)(); /* partition light source object */
101 greg 1.8 double (*getpleq)(); /* plane equation for surface */
102     double (*getdisk)(); /* maximum disk for surface */
103     } SOBJECT; /* source object functions */
104 greg 1.1
105 greg 1.8 typedef union {
106     VSMATERIAL *mf; /* material functions */
107     SOBJECT *of; /* object functions */
108     } SRCFUNC; /* source functions */
109    
110     extern SRCFUNC sfun[]; /* source dispatch table */
111    
112 greg 1.2 extern SRCREC *source; /* our source list */
113 greg 1.1 extern int nsources; /* the number of sources */
114    
115 greg 1.14 #define sflatform(sn,dir) -DOT(source[sn].snorm, dir)
116    
117 greg 1.11 #define getplaneq(c,o) (*sfun[(o)->otype].of->getpleq)(c,o)
118     #define getmaxdisk(c,o) (*sfun[(o)->otype].of->getdisk)(c,o)
119     #define setsource(s,o) (*sfun[(o)->otype].of->setsrc)(s,o)
120 greg 2.5
121     /* defined in source.c */
122     extern void marksources(void);
123     extern void freesources(void);
124     extern int srcray(RAY *sr, RAY *r, SRCINDEX *si);
125     extern void srcvalue(RAY *r);
126     extern int sourcehit(RAY *r);
127     extern void direct(RAY *r, void (*f)(), char *p);
128     extern void srcscatter(RAY *r);
129     extern int m_light(OBJREC *m, RAY *r);
130     /* defined in srcsamp.c */
131     extern double nextssamp(RAY *r, SRCINDEX *si);
132     extern int skipparts(int ct[3], int sz[3], int pp[2], unsigned char *pt);
133     extern void nopart(SRCINDEX *si, RAY *r);
134     extern void cylpart(SRCINDEX *si, RAY *r);
135     extern void flatpart(SRCINDEX *si, RAY *r);
136     extern double scylform(int sn, FVECT dir);
137     /* defined in srcsupp.c */
138     extern void initstypes(void);
139     extern int newsource(void);
140     extern void setflatss(SRCREC *src);
141     extern void fsetsrc(SRCREC *src, OBJREC *so);
142     extern void ssetsrc(SRCREC *src, OBJREC *so);
143     extern void sphsetsrc(SRCREC *src, OBJREC *so);
144     extern void rsetsrc(SRCREC *src, OBJREC *so);
145     extern void cylsetsrc(SRCREC *src, OBJREC *so);
146     extern SPOT *makespot(OBJREC *m);
147     extern int spotout(RAY *r, SPOT *s);
148     extern double fgetmaxdisk(FVECT ocent, OBJREC *op);
149     extern double rgetmaxdisk(FVECT ocent, OBJREC *op);
150     extern double fgetplaneq(FVECT nvec, OBJREC *op);
151     extern double rgetplaneq(FVECT nvec, OBJREC *op);
152     extern int commonspot(SPOT *sp1, SPOT *sp2, FVECT org);
153     extern int commonbeam(SPOT *sp1, SPOT *sp2, FVECT org);
154     extern int checkspot(SPOT *sp, FVECT nrm);
155     extern double spotdisk(FVECT oc, OBJREC *op, SPOT *sp, FVECT pos);
156     extern double beamdisk(FVECT oc, OBJREC *op, SPOT *sp, FVECT dir);
157     extern double intercircle(FVECT cc, FVECT c1, FVECT c2,
158     double r1s, double r2s);
159     /* defined in virtuals.c */
160     extern void markvirtuals(void);
161     extern void addvirtuals(int sn, int nr);
162     extern void vproject(OBJREC *o, int sn, int n);
163     extern OBJREC *vsmaterial(OBJREC *o);
164     extern int makevsrc(OBJREC *op, int sn, MAT4 pm);
165     extern double getdisk(FVECT oc, OBJREC *op, int sn);
166     extern int vstestvis(int f, OBJREC *o, FVECT oc, double or2, int sn);
167     extern void virtverb(int sn, FILE *fp);
168    
169 schorsch 2.7
170     #ifdef __cplusplus
171     }
172 greg 2.5 #endif
173 schorsch 2.7 #endif /* _RAD_SOURCE_H_ */
174