| 36 |
|
VSMATERIAL direct1_vs = {dir_proj, 1}; |
| 37 |
|
VSMATERIAL direct2_vs = {dir_proj, 2}; |
| 38 |
|
|
| 39 |
+ |
#define fndx(m) ((m)->otype == MAT_DIRECT1 ? 4 : 8) |
| 40 |
|
|
| 41 |
+ |
|
| 42 |
+ |
static |
| 43 |
+ |
dir_check(m) /* check arguments and load function file */ |
| 44 |
+ |
register OBJREC *m; |
| 45 |
+ |
{ |
| 46 |
+ |
register FULLXF *mxf; |
| 47 |
+ |
register int ff; |
| 48 |
+ |
|
| 49 |
+ |
ff = fndx(m)+1; |
| 50 |
+ |
if (ff > m->oargs.nsargs) |
| 51 |
+ |
objerror(m, USER, "too few arguments"); |
| 52 |
+ |
if (m->os == NULL) { |
| 53 |
+ |
mxf = (FULLXF *)malloc(sizeof(FULLXF)); |
| 54 |
+ |
if (mxf == NULL) |
| 55 |
+ |
error(SYSTEM, "out of memory in dir_check"); |
| 56 |
+ |
if (fullxf(mxf, m->oargs.nsargs-ff, m->oargs.sarg+ff) != |
| 57 |
+ |
m->oargs.nsargs-ff) |
| 58 |
+ |
objerror(m, USER, "bad transform"); |
| 59 |
+ |
if (mxf->f.sca < 0.0) |
| 60 |
+ |
mxf->f.sca = -mxf->f.sca; |
| 61 |
+ |
if (mxf->b.sca < 0.0) |
| 62 |
+ |
mxf->b.sca = -mxf->b.sca; |
| 63 |
+ |
m->os = (char *)mxf; |
| 64 |
+ |
} |
| 65 |
+ |
} |
| 66 |
+ |
|
| 67 |
+ |
|
| 68 |
|
m_direct(m, r) /* shade redirected ray */ |
| 69 |
|
register OBJREC *m; |
| 70 |
|
register RAY *r; |
| 94 |
|
double coef; |
| 95 |
|
register int j; |
| 96 |
|
/* set up function */ |
| 97 |
< |
setfunc(m, r); |
| 97 |
> |
setmap(m, r, &((FULLXF *)m->os)->b); |
| 98 |
> |
funcfile(m->oargs.sarg[fndx(m)]); |
| 99 |
|
sa = m->oargs.sarg + 4*n; |
| 100 |
|
/* compute coefficient */ |
| 101 |
|
errno = 0; |
| 108 |
|
errno = 0; |
| 109 |
|
for (j = 0; j < 3; j++) |
| 110 |
|
nr.rdir[j] = varvalue(sa[j+1]); |
| 111 |
< |
if (errno || normalize(nr.rdir) == 0.0) |
| 111 |
> |
if (errno) |
| 112 |
|
goto computerr; |
| 113 |
+ |
multv3(nr.rdir, nr.rdir, ((FULLXF *)m->os)->f.xfm); |
| 114 |
+ |
if (r->rox != NULL) |
| 115 |
+ |
multv3(nr.rdir, nr.rdir, r->rox->f.xfm); |
| 116 |
+ |
if (normalize(nr.rdir) == 0.0) |
| 117 |
+ |
goto computerr; |
| 118 |
|
/* compute value */ |
| 119 |
|
if (r->rsrc >= 0) |
| 120 |
|
nr.rsrc = source[r->rsrc].sa.sv.sn; |
| 141 |
|
double olddot, newdot, od; |
| 142 |
|
register int i, j; |
| 143 |
|
/* get material arguments */ |
| 144 |
< |
m = objptr(o->omod); |
| 144 |
> |
m = vsmaterial(o); |
| 145 |
|
dir_check(m); |
| 146 |
|
sa = m->oargs.sarg + 4*n; |
| 147 |
|
/* initialize test ray */ |
| 167 |
|
if (!(*ofun[o->otype].funp)(o, &tr)) |
| 168 |
|
return(0); /* no intersection! */ |
| 169 |
|
/* compute redirection */ |
| 170 |
< |
setfunc(m, &tr); |
| 170 |
> |
setmap(m, &tr, &((FULLXF *)m->os)->b); |
| 171 |
> |
funcfile(m->oargs.sarg[fndx(m)]); |
| 172 |
|
errno = 0; |
| 173 |
|
if (varvalue(sa[0]) <= FTINY) |
| 174 |
|
return(0); /* insignificant */ |
| 178 |
|
newdir[i] = varvalue(sa[i+1]); |
| 179 |
|
if (errno) |
| 180 |
|
goto computerr; |
| 181 |
+ |
multv3(newdir, newdir, ((FULLXF *)m->os)->f.xfm); |
| 182 |
+ |
/* normalization unnecessary */ |
| 183 |
|
newdot = DOT(newdir, nv); |
| 184 |
|
if (newdot <= FTINY && newdot >= -FTINY) |
| 185 |
|
return(0); /* new dir parallels plane */ |
| 186 |
|
/* everything OK -- compute shear */ |
| 187 |
|
for (i = 0; i < 3; i++) |
| 188 |
< |
h[i] = tr.rdir[i]/olddot + newdir[i]/newdot; |
| 188 |
> |
h[i] = newdir[i]/newdot - tr.rdir[i]/olddot; |
| 189 |
|
setident4(pm); |
| 190 |
|
for (j = 0; j < 3; j++) { |
| 191 |
|
for (i = 0; i < 3; i++) |
| 202 |
|
computerr: |
| 203 |
|
objerror(m, WARNING, "projection compute error"); |
| 204 |
|
return(0); |
| 168 |
– |
} |
| 169 |
– |
|
| 170 |
– |
|
| 171 |
– |
static |
| 172 |
– |
dir_check(m) /* check arguments and load function file */ |
| 173 |
– |
register OBJREC *m; |
| 174 |
– |
{ |
| 175 |
– |
register int ff; |
| 176 |
– |
|
| 177 |
– |
ff = m->otype == MAT_DIRECT1 ? 4 : 8; |
| 178 |
– |
if (ff >= m->oargs.nsargs) |
| 179 |
– |
objerror(m, USER, "too few arguments"); |
| 180 |
– |
if (!vardefined(m->oargs.sarg[0])) |
| 181 |
– |
loadfunc(m->oargs.sarg[ff]); |
| 205 |
|
} |
