| 8 |
|
#include "copyright.h" |
| 9 |
|
|
| 10 |
|
#include "ray.h" |
| 11 |
– |
|
| 11 |
|
#include "otypes.h" |
| 12 |
< |
|
| 12 |
> |
#include "rtotypes.h" |
| 13 |
|
#include "source.h" |
| 14 |
|
|
| 15 |
|
/* |
| 23 |
|
* part of the direct calculation. |
| 24 |
|
*/ |
| 25 |
|
|
| 26 |
+ |
static int mir_proj(MAT4 pm, OBJREC *o, SRCREC *s, int n); |
| 27 |
+ |
static void mirrorproj(MAT4 m, FVECT nv, double offs); |
| 28 |
|
|
| 28 |
– |
static int mir_proj(), mirrorproj(); |
| 29 |
– |
|
| 29 |
|
VSMATERIAL mirror_vs = {mir_proj, 1}; |
| 30 |
|
|
| 31 |
|
|
| 32 |
< |
int |
| 33 |
< |
m_mirror(m, r) /* shade mirrored ray */ |
| 34 |
< |
register OBJREC *m; |
| 35 |
< |
register RAY *r; |
| 32 |
> |
extern int |
| 33 |
> |
m_mirror( /* shade mirrored ray */ |
| 34 |
> |
register OBJREC *m, |
| 35 |
> |
register RAY *r |
| 36 |
> |
) |
| 37 |
|
{ |
| 38 |
|
COLOR mcolor; |
| 39 |
|
RAY nr; |
| 66 |
|
multcolor(mcolor, r->pcol); |
| 67 |
|
/* compute reflected ray */ |
| 68 |
|
if (r->rsrc >= 0) { /* relayed light source */ |
| 69 |
< |
rayorigin(&nr, r, REFLECTED, 1.); |
| 69 |
> |
rayorigin(&nr, REFLECTED, r, mcolor); |
| 70 |
|
/* ignore textures */ |
| 71 |
|
for (i = 0; i < 3; i++) |
| 72 |
|
nr.rdir[i] = r->rdir[i] + 2.*r->rod*r->ron[i]; |
| 76 |
|
FVECT pnorm; |
| 77 |
|
double pdot; |
| 78 |
|
|
| 79 |
< |
if (rayorigin(&nr, r, REFLECTED, bright(mcolor)) < 0) |
| 79 |
> |
if (rayorigin(&nr, REFLECTED, r, mcolor) < 0) |
| 80 |
|
return(1); |
| 81 |
|
if (DOT(r->pert,r->pert) > FTINY*FTINY) { |
| 82 |
|
pdot = raynormal(pnorm, r); /* use textures */ |
| 90 |
|
nr.rdir[i] = r->rdir[i] + 2.*r->rod*r->ron[i]; |
| 91 |
|
} |
| 92 |
|
rayvalue(&nr); |
| 93 |
< |
multcolor(nr.rcol, mcolor); |
| 93 |
> |
multcolor(nr.rcol, nr.rcoef); |
| 94 |
|
addcolor(r->rcol, nr.rcol); |
| 95 |
|
if (rpure && r->ro != NULL && isflat(r->ro->otype)) |
| 96 |
|
r->rt = r->rot + nr.rt; |
| 99 |
|
|
| 100 |
|
|
| 101 |
|
static int |
| 102 |
< |
mir_proj(pm, o, s, n) /* compute a mirror's projection */ |
| 103 |
< |
MAT4 pm; |
| 104 |
< |
register OBJREC *o; |
| 105 |
< |
SRCREC *s; |
| 106 |
< |
int n; |
| 102 |
> |
mir_proj( /* compute a mirror's projection */ |
| 103 |
> |
MAT4 pm, |
| 104 |
> |
register OBJREC *o, |
| 105 |
> |
SRCREC *s, |
| 106 |
> |
int n |
| 107 |
> |
) |
| 108 |
|
{ |
| 109 |
+ |
double corr = 1.; |
| 110 |
|
FVECT nv, sc; |
| 111 |
< |
double od; |
| 112 |
< |
register int i, j; |
| 111 |
> |
double od, offs; |
| 112 |
> |
int i; |
| 113 |
|
/* get surface normal and offset */ |
| 114 |
< |
od = getplaneq(nv, o); |
| 115 |
< |
/* check for extreme point for behind */ |
| 114 |
> |
offs = od = getplaneq(nv, o); |
| 115 |
> |
if (s->sflags & SDISTANT) |
| 116 |
> |
offs = 0.; |
| 117 |
> |
/* check for extreme point behind */ |
| 118 |
> |
if (s->sflags & SCIR) { |
| 119 |
> |
if (s->sflags & (SFLAT|SDISTANT)) |
| 120 |
> |
corr = 1.12837917; /* correct setflatss() */ |
| 121 |
> |
else |
| 122 |
> |
corr = 1.0/0.7236; /* correct sphsetsrc() */ |
| 123 |
> |
} |
| 124 |
|
VCOPY(sc, s->sloc); |
| 125 |
|
for (i = s->sflags & SFLAT ? SV : SW; i >= 0; i--) |
| 126 |
< |
if (DOT(nv, s->ss[i]) > 0.) |
| 127 |
< |
for (j = 0; j < 3; j++) |
| 118 |
< |
sc[j] += s->ss[i][j]; |
| 126 |
> |
if (DOT(nv, s->ss[i]) > offs) |
| 127 |
> |
VSUM(sc, sc, s->ss[i], corr); |
| 128 |
|
else |
| 129 |
< |
for (j = 0; j < 3; j++) |
| 130 |
< |
sc[j] -= s->ss[i][j]; |
| 122 |
< |
if (DOT(sc, nv) <= (s->sflags & SDISTANT ? FTINY : od+FTINY)) |
| 129 |
> |
VSUM(sc, sc, s->ss[i], -corr); |
| 130 |
> |
if (DOT(sc, nv) <= offs+FTINY) |
| 131 |
|
return(0); |
| 132 |
|
/* everything OK -- compute projection */ |
| 133 |
|
mirrorproj(pm, nv, od); |
| 135 |
|
} |
| 136 |
|
|
| 137 |
|
|
| 138 |
< |
static int |
| 139 |
< |
mirrorproj(m, nv, offs) /* get mirror projection for surface */ |
| 140 |
< |
register MAT4 m; |
| 141 |
< |
FVECT nv; |
| 142 |
< |
double offs; |
| 138 |
> |
static void |
| 139 |
> |
mirrorproj( /* get mirror projection for surface */ |
| 140 |
> |
register MAT4 m, |
| 141 |
> |
FVECT nv, |
| 142 |
> |
double offs |
| 143 |
> |
) |
| 144 |
|
{ |
| 145 |
|
register int i, j; |
| 146 |
|
/* assign matrix */ |
