| 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 |
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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 |
|
FVECT rorg; /* origin of ray */ |
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|
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 */ |
| 47 |
– |
OBJECT robj; /* intersected object number */ |
| 50 |
|
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 |
|
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 */ |
| 58 |
– |
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) |
