| 1 |
– |
/* Copyright (c) 1986 Regents of the University of California */ |
| 2 |
– |
|
| 1 |
|
#ifndef lint |
| 2 |
< |
static char SCCSid[] = "$SunId$ LBL"; |
| 2 |
> |
static const char RCSid[] = "$Id$"; |
| 3 |
|
#endif |
| 6 |
– |
|
| 4 |
|
/* |
| 5 |
|
* t_func.c - routine for procedural textures. |
| 6 |
+ |
*/ |
| 7 |
+ |
|
| 8 |
+ |
/* ==================================================================== |
| 9 |
+ |
* The Radiance Software License, Version 1.0 |
| 10 |
|
* |
| 11 |
< |
* 4/8/86 |
| 11 |
> |
* Copyright (c) 1990 - 2002 The Regents of the University of California, |
| 12 |
> |
* through Lawrence Berkeley National Laboratory. All rights reserved. |
| 13 |
> |
* |
| 14 |
> |
* Redistribution and use in source and binary forms, with or without |
| 15 |
> |
* modification, are permitted provided that the following conditions |
| 16 |
> |
* are met: |
| 17 |
> |
* |
| 18 |
> |
* 1. Redistributions of source code must retain the above copyright |
| 19 |
> |
* notice, this list of conditions and the following disclaimer. |
| 20 |
> |
* |
| 21 |
> |
* 2. Redistributions in binary form must reproduce the above copyright |
| 22 |
> |
* notice, this list of conditions and the following disclaimer in |
| 23 |
> |
* the documentation and/or other materials provided with the |
| 24 |
> |
* distribution. |
| 25 |
> |
* |
| 26 |
> |
* 3. The end-user documentation included with the redistribution, |
| 27 |
> |
* if any, must include the following acknowledgment: |
| 28 |
> |
* "This product includes Radiance software |
| 29 |
> |
* (http://radsite.lbl.gov/) |
| 30 |
> |
* developed by the Lawrence Berkeley National Laboratory |
| 31 |
> |
* (http://www.lbl.gov/)." |
| 32 |
> |
* Alternately, this acknowledgment may appear in the software itself, |
| 33 |
> |
* if and wherever such third-party acknowledgments normally appear. |
| 34 |
> |
* |
| 35 |
> |
* 4. The names "Radiance," "Lawrence Berkeley National Laboratory" |
| 36 |
> |
* and "The Regents of the University of California" must |
| 37 |
> |
* not be used to endorse or promote products derived from this |
| 38 |
> |
* software without prior written permission. For written |
| 39 |
> |
* permission, please contact [email protected]. |
| 40 |
> |
* |
| 41 |
> |
* 5. Products derived from this software may not be called "Radiance", |
| 42 |
> |
* nor may "Radiance" appear in their name, without prior written |
| 43 |
> |
* permission of Lawrence Berkeley National Laboratory. |
| 44 |
> |
* |
| 45 |
> |
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
| 46 |
> |
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 47 |
> |
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| 48 |
> |
* DISCLAIMED. IN NO EVENT SHALL Lawrence Berkeley National Laboratory OR |
| 49 |
> |
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 50 |
> |
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 51 |
> |
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| 52 |
> |
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| 53 |
> |
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| 54 |
> |
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| 55 |
> |
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 56 |
> |
* SUCH DAMAGE. |
| 57 |
> |
* ==================================================================== |
| 58 |
> |
* |
| 59 |
> |
* This software consists of voluntary contributions made by many |
| 60 |
> |
* individuals on behalf of Lawrence Berkeley National Laboratory. For more |
| 61 |
> |
* information on Lawrence Berkeley National Laboratory, please see |
| 62 |
> |
* <http://www.lbl.gov/>. |
| 63 |
|
*/ |
| 64 |
|
|
| 65 |
|
#include "ray.h" |
| 66 |
|
|
| 67 |
+ |
#include "func.h" |
| 68 |
+ |
|
| 69 |
|
/* |
| 70 |
|
* A procedural texture perturbs the surface normal |
| 71 |
|
* at the point of intersection with an object. It has |
| 82 |
|
* from the original coordinates to the current coordinates. |
| 83 |
|
*/ |
| 84 |
|
|
| 31 |
– |
typedef struct { |
| 32 |
– |
struct { |
| 33 |
– |
double sca; /* scale factor */ |
| 34 |
– |
double xfm[4][4]; /* transformation matrix */ |
| 35 |
– |
} fore, back; |
| 36 |
– |
} XFORM; |
| 85 |
|
|
| 38 |
– |
|
| 86 |
|
t_func(m, r) /* compute texture for ray */ |
| 87 |
|
register OBJREC *m; |
| 88 |
|
register RAY *r; |
| 89 |
|
{ |
| 43 |
– |
extern double varvalue(); |
| 44 |
– |
extern int errno; |
| 90 |
|
FVECT disp; |
| 91 |
< |
register XFORM *mxf; |
| 91 |
> |
double d; |
| 92 |
> |
register MFUNC *mf; |
| 93 |
|
register int i; |
| 48 |
– |
register char **sa; |
| 94 |
|
|
| 95 |
|
if (m->oargs.nsargs < 4) |
| 96 |
|
objerror(m, USER, "bad # arguments"); |
| 97 |
< |
sa = m->oargs.sarg; |
| 98 |
< |
|
| 54 |
< |
if ((mxf = (XFORM *)m->os) == NULL) { |
| 55 |
< |
mxf = (XFORM *)malloc(sizeof(XFORM)); |
| 56 |
< |
if (mxf == NULL) |
| 57 |
< |
goto memerr; |
| 58 |
< |
mxf->fore.sca = 1.0; |
| 59 |
< |
setident4(mxf->fore.xfm); |
| 60 |
< |
if (xf(mxf->fore.xfm, &mxf->fore.sca, |
| 61 |
< |
m->oargs.nsargs-4, sa+4) != m->oargs.nsargs-4) |
| 62 |
< |
objerror(m, USER, "bad transform"); |
| 63 |
< |
if (mxf->fore.sca < 0.0) |
| 64 |
< |
mxf->fore.sca = -mxf->fore.sca; |
| 65 |
< |
mxf->back.sca = 1.0; |
| 66 |
< |
setident4(mxf->back.xfm); |
| 67 |
< |
invxf(mxf->back.xfm, &mxf->back.sca, |
| 68 |
< |
m->oargs.nsargs-4, sa+4); |
| 69 |
< |
if (mxf->back.sca < 0.0) |
| 70 |
< |
mxf->back.sca = -mxf->back.sca; |
| 71 |
< |
m->os = (char *)mxf; |
| 72 |
< |
} |
| 73 |
< |
|
| 74 |
< |
setmap(m, r, mxf->back.xfm, mxf->back.sca); |
| 75 |
< |
|
| 76 |
< |
if (!vardefined(sa[0])) |
| 77 |
< |
loadfunc(sa[3]); |
| 97 |
> |
mf = getfunc(m, 3, 0x7, 1); |
| 98 |
> |
setfunc(m, r); |
| 99 |
|
errno = 0; |
| 100 |
< |
for (i = 0; i < 3; i++) |
| 101 |
< |
disp[i] = varvalue(sa[i]); |
| 102 |
< |
if (errno) { |
| 103 |
< |
objerror(m, WARNING, "compute error"); |
| 104 |
< |
return; |
| 100 |
> |
for (i = 0; i < 3; i++) { |
| 101 |
> |
disp[i] = evalue(mf->ep[i]); |
| 102 |
> |
if (errno) { |
| 103 |
> |
objerror(m, WARNING, "compute error"); |
| 104 |
> |
return(0); |
| 105 |
> |
} |
| 106 |
|
} |
| 107 |
< |
multv3(disp, disp, mxf->fore.xfm); |
| 108 |
< |
multv3(disp, disp, r->rofx); |
| 107 |
> |
if (mf->f != &unitxf) |
| 108 |
> |
multv3(disp, disp, mf->f->xfm); |
| 109 |
> |
if (r->rox != NULL) { |
| 110 |
> |
multv3(disp, disp, r->rox->f.xfm); |
| 111 |
> |
d = 1.0 / (mf->f->sca * r->rox->f.sca); |
| 112 |
> |
} else |
| 113 |
> |
d = 1.0 / mf->f->sca; |
| 114 |
|
for (i = 0; i < 3; i++) |
| 115 |
< |
r->pert[i] += disp[i] / (mxf->fore.sca * r->rofs); |
| 116 |
< |
return; |
| 90 |
< |
memerr: |
| 91 |
< |
error(SYSTEM, "out of memory in t_func"); |
| 115 |
> |
r->pert[i] += disp[i] * d; |
| 116 |
> |
return(0); |
| 117 |
|
} |
