28 |
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/* reflected ray types */ |
29 |
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#define RAYREFL (SHADOW|REFLECTED|AMBIENT|SPECULAR) |
30 |
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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 */ |
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typedef struct ray { |
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– |
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 |
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short rtype; /* ray type */ |
37 |
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short crtype; /* cumulative ray type */ |
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const struct ray *parent; /* ray this originated from */ |
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FVECT rorg; /* origin of ray */ |
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FVECT rdir; /* normalized direction of ray */ |
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< |
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 |
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OBJECT *clipset; /* set of objects currently clipped */ |
47 |
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OBJECT *newcset; /* next clipset, used for transmission */ |
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void (*revf)(struct ray *); /* ray evaluation function */ |
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void (*hitf)(OBJECT *, struct ray *); /* custom hit test */ |
47 |
– |
OBJECT robj; /* intersected object number */ |
50 |
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OBJREC *ro; /* intersected object (one with material) */ |
49 |
– |
double rot; /* distance to object */ |
50 |
– |
FVECT rop; /* intersection point */ |
51 |
– |
FVECT ron; /* intersection surface normal */ |
52 |
– |
double rod; /* -DOT(rdir, ron) */ |
51 |
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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 |
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COLOR pcol; /* pattern color */ |
59 |
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COLOR rcol; /* returned radiance value */ |
58 |
– |
double rt; /* returned effective ray length */ |
60 |
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COLOR cext; /* medium extinction coefficient */ |
61 |
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COLOR albedo; /* medium scattering albedo */ |
62 |
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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 |
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} RAY; |
67 |
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68 |
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#define rayvalue(r) (*(r)->revf)(r) |