| 1 |
< |
/* Copyright (c) 1989 Regents of the University of California */ |
| 1 |
> |
/* Copyright (c) 1991 Regents of the University of California */ |
| 2 |
|
|
| 3 |
|
#ifndef lint |
| 4 |
|
static char SCCSid[] = "$SunId$ LBL"; |
| 14 |
|
|
| 15 |
|
#include "data.h" |
| 16 |
|
|
| 17 |
+ |
#include "func.h" |
| 18 |
+ |
|
| 19 |
|
/* |
| 20 |
|
* A stored texture is specified as follows: |
| 21 |
|
* |
| 33 |
|
* to get from the original coordinates to the current coordinates. |
| 34 |
|
*/ |
| 35 |
|
|
| 34 |
– |
typedef struct { |
| 35 |
– |
struct { |
| 36 |
– |
double sca; /* scale factor */ |
| 37 |
– |
double xfm[4][4]; /* transformation matrix */ |
| 38 |
– |
} fore, back; |
| 39 |
– |
} XFORM; |
| 36 |
|
|
| 41 |
– |
|
| 37 |
|
t_data(m, r) /* interpolate texture data */ |
| 38 |
|
register OBJREC *m; |
| 39 |
|
RAY *r; |
| 40 |
|
{ |
| 46 |
– |
extern double varvalue(), funvalue(), datavalue(); |
| 47 |
– |
extern int errno; |
| 41 |
|
int nv; |
| 42 |
|
FVECT dval, disp; |
| 43 |
|
double pt[MAXDIM]; |
| 44 |
|
double d; |
| 45 |
|
DATARRAY *dp; |
| 46 |
< |
register XFORM *mxf; |
| 54 |
< |
register char **sa; |
| 46 |
> |
register MFUNC *mf; |
| 47 |
|
register int i; |
| 48 |
|
|
| 49 |
|
if (m->oargs.nsargs < 8) |
| 50 |
|
objerror(m, USER, "bad # arguments"); |
| 51 |
< |
sa = m->oargs.sarg; |
| 52 |
< |
|
| 53 |
< |
for (i = 7; i < m->oargs.nsargs && sa[i][0] != '-'; i++) |
| 54 |
< |
; |
| 63 |
< |
nv = i-7; |
| 64 |
< |
if ((mxf = (XFORM *)m->os) == NULL) { |
| 65 |
< |
mxf = (XFORM *)malloc(sizeof(XFORM)); |
| 66 |
< |
if (mxf == NULL) |
| 67 |
< |
goto memerr; |
| 68 |
< |
mxf->fore.sca = 1.0; |
| 69 |
< |
setident4(mxf->fore.xfm); |
| 70 |
< |
if (xf(mxf->fore.xfm, &mxf->fore.sca, |
| 71 |
< |
m->oargs.nsargs-i, sa+i) != m->oargs.nsargs-i) |
| 72 |
< |
objerror(m, USER, "bad transform"); |
| 73 |
< |
if (mxf->fore.sca < 0.0) |
| 74 |
< |
mxf->fore.sca = -mxf->fore.sca; |
| 75 |
< |
mxf->back.sca = 1.0; |
| 76 |
< |
setident4(mxf->back.xfm); |
| 77 |
< |
invxf(mxf->back.xfm, &mxf->back.sca, |
| 78 |
< |
m->oargs.nsargs-i, sa+i); |
| 79 |
< |
if (mxf->back.sca < 0.0) |
| 80 |
< |
mxf->back.sca = -mxf->back.sca; |
| 81 |
< |
m->os = (char *)mxf; |
| 82 |
< |
} |
| 83 |
< |
|
| 84 |
< |
setmap(m, r, mxf->back.xfm, mxf->back.sca); |
| 85 |
< |
|
| 86 |
< |
if (nv > MAXDIM) |
| 87 |
< |
goto dimerr; |
| 88 |
< |
if (!vardefined(sa[7])) |
| 89 |
< |
loadfunc(sa[6]); |
| 51 |
> |
dp = getdata(m->oargs.sarg[3]); |
| 52 |
> |
i = (1 << (nv = dp->nd)) - 1; |
| 53 |
> |
mf = getfunc(m, 6, i<<7, 1); |
| 54 |
> |
setfunc(m, r); |
| 55 |
|
errno = 0; |
| 56 |
< |
for (i = 0; i < nv; i++) |
| 57 |
< |
pt[i] = varvalue(sa[i+7]); |
| 58 |
< |
if (errno) |
| 59 |
< |
goto computerr; |
| 60 |
< |
for (i = 0; i < 3; i++) { |
| 61 |
< |
dp = getdata(sa[i+3]); |
| 56 |
> |
for (i = 0; i < nv; i++) { |
| 57 |
> |
pt[i] = evalue(mf->ep[i]); |
| 58 |
> |
if (errno) |
| 59 |
> |
goto computerr; |
| 60 |
> |
} |
| 61 |
> |
dval[0] = datavalue(dp, pt); |
| 62 |
> |
for (i = 1; i < 3; i++) { |
| 63 |
> |
dp = getdata(m->oargs.sarg[i+3]); |
| 64 |
|
if (dp->nd != nv) |
| 65 |
< |
goto dimerr; |
| 65 |
> |
objerror(m, USER, "dimension error"); |
| 66 |
|
dval[i] = datavalue(dp, pt); |
| 67 |
|
} |
| 68 |
|
errno = 0; |
| 69 |
+ |
for (i = 0; i < 3; i++) { |
| 70 |
+ |
disp[i] = funvalue(m->oargs.sarg[i], 3, dval); |
| 71 |
+ |
if (errno) |
| 72 |
+ |
goto computerr; |
| 73 |
+ |
} |
| 74 |
+ |
if (mf->f != &unitxf) |
| 75 |
+ |
multv3(disp, disp, mf->f->xfm); |
| 76 |
+ |
if (r->rox != NULL) { |
| 77 |
+ |
multv3(disp, disp, r->rox->f.xfm); |
| 78 |
+ |
d = 1.0 / (mf->f->sca * r->rox->f.sca); |
| 79 |
+ |
} else |
| 80 |
+ |
d = 1.0 / mf->f->sca; |
| 81 |
|
for (i = 0; i < 3; i++) |
| 103 |
– |
disp[i] = funvalue(sa[i], 3, dval); |
| 104 |
– |
if (errno) |
| 105 |
– |
goto computerr; |
| 106 |
– |
|
| 107 |
– |
multv3(disp, disp, mxf->fore.xfm); |
| 108 |
– |
multv3(disp, disp, r->rofx); |
| 109 |
– |
d = 1.0 / (mxf->fore.sca * r->rofs); |
| 110 |
– |
for (i = 0; i < 3; i++) |
| 82 |
|
r->pert[i] += disp[i] * d; |
| 83 |
|
return; |
| 113 |
– |
dimerr: |
| 114 |
– |
objerror(m, USER, "dimension error"); |
| 115 |
– |
memerr: |
| 116 |
– |
error(SYSTEM, "out of memory in t_data"); |
| 84 |
|
computerr: |
| 85 |
|
objerror(m, WARNING, "compute error"); |
| 86 |
|
return; |
