28 |
|
/* reflected ray types */ |
29 |
|
#define RAYREFL (SHADOW|REFLECTED|AMBIENT|SPECULAR) |
30 |
|
|
31 |
+ |
/* Arrange so double's come first for optimal alignment */ |
32 |
+ |
/* Pointers and long's come second for 64-bit mode */ |
33 |
+ |
/* Int's next (unknown length), then floats, followed by short's & char's */ |
34 |
|
typedef struct ray { |
32 |
– |
unsigned long rno; /* unique ray number */ |
33 |
– |
int rlvl; /* number of reflections for this ray */ |
34 |
– |
float rweight; /* cumulative weight (for termination) */ |
35 |
– |
COLOR rcoef; /* contribution coefficient w.r.t. parent */ |
36 |
– |
short rtype; /* ray type */ |
37 |
– |
short crtype; /* cumulative ray type */ |
38 |
– |
const struct ray *parent; /* ray this originated from */ |
35 |
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FVECT rorg; /* origin of ray */ |
36 |
|
FVECT rdir; /* normalized direction of ray */ |
37 |
< |
double rmax; /* maximum distance (aft clipping plane) */ |
38 |
< |
int rsrc; /* source we're aiming for */ |
37 |
> |
RREAL rmax; /* maximum distance (aft clipping plane) */ |
38 |
> |
RREAL rot; /* distance to object */ |
39 |
> |
FVECT rop; /* intersection point */ |
40 |
> |
FVECT ron; /* intersection surface normal */ |
41 |
> |
RREAL rod; /* -DOT(rdir, ron) */ |
42 |
> |
RREAL uv[2]; /* local coordinates */ |
43 |
> |
FVECT pert; /* surface normal perturbation */ |
44 |
> |
RREAL rt; /* returned effective ray length */ |
45 |
> |
const struct ray *parent; /* ray this originated from */ |
46 |
|
OBJECT *clipset; /* set of objects currently clipped */ |
47 |
|
OBJECT *newcset; /* next clipset, used for transmission */ |
48 |
+ |
void (*revf)(struct ray *); /* ray evaluation function */ |
49 |
|
void (*hitf)(OBJECT *, struct ray *); /* custom hit test */ |
46 |
– |
OBJECT robj; /* intersected object number */ |
50 |
|
OBJREC *ro; /* intersected object (one with material) */ |
48 |
– |
double rot; /* distance to object */ |
49 |
– |
FVECT rop; /* intersection point */ |
50 |
– |
FVECT ron; /* intersection surface normal */ |
51 |
– |
double rod; /* -DOT(rdir, ron) */ |
51 |
|
FULLXF *rox; /* object transformation */ |
52 |
< |
RREAL uv[2]; /* local coordinates */ |
53 |
< |
FVECT pert; /* surface normal perturbation */ |
52 |
> |
int *slights; /* list of lights to test for scattering */ |
53 |
> |
unsigned long rno; /* unique ray number */ |
54 |
> |
int rlvl; /* number of reflections for this ray */ |
55 |
> |
int rsrc; /* source we're aiming for */ |
56 |
> |
float rweight; /* cumulative weight (for termination) */ |
57 |
> |
COLOR rcoef; /* contribution coefficient w.r.t. parent */ |
58 |
|
COLOR pcol; /* pattern color */ |
59 |
|
COLOR rcol; /* returned radiance value */ |
57 |
– |
double rt; /* returned effective ray length */ |
60 |
|
COLOR cext; /* medium extinction coefficient */ |
61 |
|
COLOR albedo; /* medium scattering albedo */ |
62 |
|
float gecc; /* scattering eccentricity coefficient */ |
63 |
< |
int *slights; /* list of lights to test for scattering */ |
63 |
> |
OBJECT robj; /* intersected object number */ |
64 |
> |
short rtype; /* ray type */ |
65 |
> |
short crtype; /* cumulative ray type */ |
66 |
|
} RAY; |
67 |
|
|
68 |
+ |
#define rayvalue(r) (*(r)->revf)(r) |
69 |
+ |
|
70 |
|
extern char VersionID[]; /* Radiance version ID string */ |
71 |
|
|
72 |
|
extern CUBE thescene; /* our scene */ |
88 |
|
|
89 |
|
extern int do_irrad; /* compute irradiance? */ |
90 |
|
|
91 |
+ |
extern int rand_samp; /* pure Monte Carlo sampling? */ |
92 |
+ |
|
93 |
|
extern double dstrsrc; /* square source distribution */ |
94 |
|
extern double shadthresh; /* shadow threshold */ |
95 |
|
extern double shadcert; /* shadow testing certainty */ |
132 |
|
|
133 |
|
typedef struct { /* rendering parameter holder */ |
134 |
|
int do_irrad; |
135 |
+ |
int rand_samp; |
136 |
|
double dstrsrc; |
137 |
|
double shadthresh; |
138 |
|
double shadcert; |
200 |
|
/* defined in raytrace.c */ |
201 |
|
extern int rayorigin(RAY *r, int rt, const RAY *ro, const COLOR rc); |
202 |
|
extern void rayclear(RAY *r); |
203 |
< |
extern void rayvalue(RAY *r); |
203 |
> |
extern void raytrace(RAY *r); |
204 |
|
extern void rayhit(OBJECT *oset, RAY *r); |
205 |
|
extern void raycont(RAY *r); |
206 |
|
extern void raytrans(RAY *r); |
208 |
|
extern void rayparticipate(RAY *r); |
209 |
|
extern void raytexture(RAY *r, OBJECT mod); |
210 |
|
extern int raymixture(RAY *r, OBJECT fore, OBJECT back, double coef); |
211 |
< |
extern void raycontrib(COLOR rc, const RAY *r, int flags); |
211 |
> |
extern void raycontrib(double rc[3], const RAY *r, int flags); |
212 |
|
extern double raydist(const RAY *r, int flags); |
213 |
|
extern double raynormal(FVECT norm, RAY *r); |
214 |
|
extern void newrayxf(RAY *r); |