| 40 |
|
/* check arguments */ |
| 41 |
|
if (m->oargs.nfargs != 3 || m->oargs.nsargs > 1) |
| 42 |
|
objerror(m, USER, "bad number of arguments"); |
| 43 |
< |
/* check if source ray */ |
| 44 |
< |
if (r->rsrc >= 0) { /* aiming for somebody */ |
| 45 |
< |
if (source[r->rsrc].so != r->ro) |
| 46 |
< |
return; /* but not us */ |
| 47 |
< |
} else if (m->oargs.nsargs > 0) { /* else call substitute? */ |
| 43 |
> |
/* check for substitute material */ |
| 44 |
> |
if (m->oargs.nsargs > 0 && |
| 45 |
> |
(r->rsrc < 0 || source[r->rsrc].so != r->ro)) { |
| 46 |
|
rayshade(r, modifier(m->oargs.sarg[0])); |
| 47 |
< |
return; |
| 47 |
> |
return(1); |
| 48 |
|
} |
| 49 |
+ |
/* check for bad source ray */ |
| 50 |
+ |
if (r->rsrc >= 0 && source[r->rsrc].so != r->ro) |
| 51 |
+ |
return(1); |
| 52 |
+ |
|
| 53 |
|
if (r->rod < 0.) /* back is black */ |
| 54 |
< |
return; |
| 54 |
> |
return(1); |
| 55 |
|
/* get modifiers */ |
| 56 |
|
raytexture(r, m->omod); |
| 57 |
|
/* assign material color */ |
| 66 |
|
for (i = 0; i < 3; i++) |
| 67 |
|
nr.rdir[i] = r->rdir[i] + 2.*r->rod*r->ron[i]; |
| 68 |
|
/* source we're aiming for next */ |
| 69 |
< |
nr.rsrc = source[r->rsrc].sa.svnext; |
| 69 |
> |
nr.rsrc = source[r->rsrc].sa.sv.sn; |
| 70 |
|
} else { /* ordinary reflection */ |
| 71 |
|
FVECT pnorm; |
| 72 |
|
double pdot; |
| 73 |
|
|
| 74 |
|
if (rayorigin(&nr, r, REFLECTED, bright(mcolor)) < 0) |
| 75 |
< |
return; |
| 75 |
> |
return(1); |
| 76 |
|
pdot = raynormal(pnorm, r); /* use textures */ |
| 77 |
|
for (i = 0; i < 3; i++) |
| 78 |
|
nr.rdir[i] = r->rdir[i] + 2.*pdot*pnorm[i]; |
| 79 |
+ |
/* check for penetration */ |
| 80 |
+ |
if (DOT(nr.rdir, r->ron) <= FTINY) |
| 81 |
+ |
for (i = 0; i < 3; i++) |
| 82 |
+ |
nr.rdir[i] = r->rdir[i] + 2.*r->rod*r->ron[i]; |
| 83 |
|
} |
| 84 |
|
rayvalue(&nr); |
| 85 |
|
multcolor(nr.rcol, mcolor); |
| 86 |
|
addcolor(r->rcol, nr.rcol); |
| 87 |
+ |
return(1); |
| 88 |
|
} |
| 89 |
|
|
| 90 |
|
|
| 91 |
|
mir_proj(pm, o, s, n) /* compute a mirror's projection */ |
| 92 |
|
MAT4 pm; |
| 93 |
|
register OBJREC *o; |
| 94 |
< |
register SRCREC *s; |
| 94 |
> |
SRCREC *s; |
| 95 |
|
int n; |
| 96 |
|
{ |
| 97 |
|
FVECT nv; |
| 98 |
|
double od; |
| 99 |
|
/* get surface normal and offset */ |
| 100 |
< |
if (sfun[o->otype].of->getpleq == NULL) |
| 94 |
< |
return(0); /* reject non-planar case */ |
| 95 |
< |
od = (*sfun[o->otype].of->getpleq)(nv, o); |
| 100 |
> |
od = getplaneq(nv, o); |
| 101 |
|
/* check for behind */ |
| 102 |
|
if (DOT(s->sloc, nv) <= (s->sflags & SDISTANT ? FTINY : od+FTINY)) |
| 103 |
|
return(0); |
| 115 |
|
register int i, j; |
| 116 |
|
/* assign matrix */ |
| 117 |
|
setident4(m); |
| 118 |
< |
for (i = 0; i < 3; i++) |
| 119 |
< |
for (j = 0; j < 3; j++) |
| 118 |
> |
for (j = 0; j < 3; j++) { |
| 119 |
> |
for (i = 0; i < 3; i++) |
| 120 |
|
m[i][j] -= 2.*nv[i]*nv[j]; |
| 116 |
– |
for (j = 0; j < 3; j++) |
| 121 |
|
m[3][j] = 2.*offs*nv[j]; |
| 122 |
+ |
} |
| 123 |
|
} |
