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|
* p_func.c - routine for procedural patterns. |
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|
*/ |
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|
|
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< |
/* ==================================================================== |
| 9 |
< |
* The Radiance Software License, Version 1.0 |
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< |
* |
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* Copyright (c) 1990 - 2002 The Regents of the University of California, |
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* through Lawrence Berkeley National Laboratory. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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< |
* modification, are permitted provided that the following conditions |
| 16 |
< |
* are met: |
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< |
* |
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* 1. Redistributions of source code must retain the above copyright |
| 19 |
< |
* notice, this list of conditions and the following disclaimer. |
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< |
* |
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< |
* 2. Redistributions in binary form must reproduce the above copyright |
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< |
* notice, this list of conditions and the following disclaimer in |
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< |
* the documentation and/or other materials provided with the |
| 24 |
< |
* distribution. |
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< |
* |
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* 3. The end-user documentation included with the redistribution, |
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< |
* if any, must include the following acknowledgment: |
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< |
* "This product includes Radiance software |
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* (http://radsite.lbl.gov/) |
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< |
* developed by the Lawrence Berkeley National Laboratory |
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< |
* (http://www.lbl.gov/)." |
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< |
* Alternately, this acknowledgment may appear in the software itself, |
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< |
* if and wherever such third-party acknowledgments normally appear. |
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* |
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* 4. The names "Radiance," "Lawrence Berkeley National Laboratory" |
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< |
* and "The Regents of the University of California" must |
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< |
* not be used to endorse or promote products derived from this |
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< |
* software without prior written permission. For written |
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< |
* permission, please contact [email protected]. |
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< |
* |
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< |
* 5. Products derived from this software may not be called "Radiance", |
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< |
* nor may "Radiance" appear in their name, without prior written |
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< |
* permission of Lawrence Berkeley National Laboratory. |
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* |
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< |
* 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 |
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< |
* DISCLAIMED. IN NO EVENT SHALL Lawrence Berkeley National Laboratory OR |
| 49 |
< |
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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< |
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
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< |
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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< |
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
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< |
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
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< |
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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< |
* SUCH DAMAGE. |
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< |
* ==================================================================== |
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* |
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< |
* This software consists of voluntary contributions made by many |
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< |
* individuals on behalf of Lawrence Berkeley National Laboratory. For more |
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< |
* information on Lawrence Berkeley National Laboratory, please see |
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* <http://www.lbl.gov/>. |
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< |
*/ |
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> |
#include "copyright.h" |
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|
|
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|
#include "ray.h" |
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– |
|
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|
#include "func.h" |
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+ |
#include "random.h" |
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+ |
#include "rtotypes.h" |
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|
|
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/* |
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|
* A procedural pattern can either be a brightness or a |
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|
* 0 |
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|
* n A1 A2 .. |
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|
* |
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+ |
* A spectral function is given as: |
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+ |
* |
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+ |
* modifier specfunc name |
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+ |
* 2+ sfunc filename xf |
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+ |
* 0 |
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+ |
* 2+ nmA nmB A3 .. |
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+ |
* |
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|
* Filename is the name of the file where the variable definitions |
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|
* can be found. The list of real arguments can be accessed by |
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|
* definitions in the file. The xf is a transformation |
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|
* to get from the original coordinates to the current coordinates. |
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+ |
* For the "specfunc" primitive, sfunc(nm) is a function of wavelength |
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+ |
* and must be defined from nmA to nmB, and should average to 1 over |
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+ |
* its range. |
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|
*/ |
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|
|
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|
|
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< |
p_bfunc(m, r) /* compute brightness pattern */ |
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< |
OBJREC *m; |
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< |
RAY *r; |
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> |
int |
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> |
p_bfunc( /* compute brightness pattern */ |
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> |
OBJREC *m, |
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> |
RAY *r |
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> |
) |
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|
{ |
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|
double bval; |
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< |
register MFUNC *mf; |
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> |
MFUNC *mf; |
| 56 |
|
|
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|
if (m->oargs.nsargs < 2) |
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|
objerror(m, USER, "bad # arguments"); |
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|
setfunc(m, r); |
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|
errno = 0; |
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|
bval = evalue(mf->ep[0]); |
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< |
if (errno) { |
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> |
if ((errno == EDOM) | (errno == ERANGE)) { |
| 64 |
|
objerror(m, WARNING, "compute error"); |
| 65 |
|
return(0); |
| 66 |
|
} |
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< |
scalecolor(r->pcol, bval); |
| 67 |
> |
scalescolor(r->pcol, bval); |
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|
return(0); |
| 69 |
|
} |
| 70 |
|
|
| 71 |
|
|
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< |
p_cfunc(m, r) /* compute color pattern */ |
| 73 |
< |
OBJREC *m; |
| 74 |
< |
RAY *r; |
| 72 |
> |
int |
| 73 |
> |
p_cfunc( /* compute color pattern */ |
| 74 |
> |
OBJREC *m, |
| 75 |
> |
RAY *r |
| 76 |
> |
) |
| 77 |
|
{ |
| 78 |
< |
COLOR cval; |
| 79 |
< |
register MFUNC *mf; |
| 78 |
> |
SCOLOR scval; |
| 79 |
> |
MFUNC *mf; |
| 80 |
|
|
| 81 |
|
if (m->oargs.nsargs < 4) |
| 82 |
|
objerror(m, USER, "bad # arguments"); |
| 83 |
|
mf = getfunc(m, 3, 0x7, 0); |
| 84 |
|
setfunc(m, r); |
| 85 |
|
errno = 0; |
| 86 |
< |
setcolor(cval, evalue(mf->ep[0]), |
| 86 |
> |
setscolor(scval, evalue(mf->ep[0]), |
| 87 |
|
evalue(mf->ep[1]), |
| 88 |
|
evalue(mf->ep[2])); |
| 89 |
< |
if (errno) { |
| 89 |
> |
if ((errno == EDOM) | (errno == ERANGE)) { |
| 90 |
|
objerror(m, WARNING, "compute error"); |
| 91 |
|
return(0); |
| 92 |
|
} |
| 93 |
< |
multcolor(r->pcol, cval); |
| 93 |
> |
smultscolor(r->pcol, scval); |
| 94 |
> |
return(0); |
| 95 |
> |
} |
| 96 |
> |
|
| 97 |
> |
|
| 98 |
> |
int |
| 99 |
> |
p_specfunc( /* compute spectral pattern */ |
| 100 |
> |
OBJREC *m, |
| 101 |
> |
RAY *r |
| 102 |
> |
) |
| 103 |
> |
{ |
| 104 |
> |
SCOLOR scsamp; |
| 105 |
> |
SCOLOR scval; |
| 106 |
> |
double wl, wlmin, wlmax, wlstep; |
| 107 |
> |
int ns, i; |
| 108 |
> |
MFUNC *mf; |
| 109 |
> |
|
| 110 |
> |
if ((m->oargs.nsargs < 2) | (m->oargs.nfargs < 2)) |
| 111 |
> |
objerror(m, USER, "bad # arguments"); |
| 112 |
> |
if (m->oargs.farg[0] < m->oargs.farg[1]) { |
| 113 |
> |
wlmin = m->oargs.farg[0]; |
| 114 |
> |
wlmax = m->oargs.farg[1]; |
| 115 |
> |
} else { |
| 116 |
> |
wlmin = m->oargs.farg[1]; |
| 117 |
> |
wlmax = m->oargs.farg[0]; |
| 118 |
> |
} |
| 119 |
> |
if (wlmin < WLPART[3]) wlmin = WLPART[3]; |
| 120 |
> |
if (wlmax > WLPART[0]) wlmax = WLPART[0]; |
| 121 |
> |
if (wlmin >= wlmax) { |
| 122 |
> |
objerror(m, WARNING, "incompatible wavelength sampling"); |
| 123 |
> |
return(0); |
| 124 |
> |
} |
| 125 |
> |
wlstep = (wlmax - wlmin)/(double)MAXCSAMP; |
| 126 |
> |
mf = getfunc(m, 1, 0, 0); |
| 127 |
> |
setfunc(m, r); |
| 128 |
> |
errno = 0; |
| 129 |
> |
ns = (wlmax - wlmin)/wlstep + .1; |
| 130 |
> |
wl = wlmax - .5*wlstep; |
| 131 |
> |
for (i = ns; i-- > 0; wl -= wlstep) { |
| 132 |
> |
double ws = wl + 0.9*(1.-frandom())*wlstep; |
| 133 |
> |
scsamp[i] = funvalue(m->oargs.sarg[0], 1, &ws); |
| 134 |
> |
if ((errno == EDOM) | (errno == ERANGE)) { |
| 135 |
> |
objerror(m, WARNING, "compute error"); |
| 136 |
> |
return(0); |
| 137 |
> |
} |
| 138 |
> |
} |
| 139 |
> |
convertscolor(scval, NCSAMP, WLPART[0], WLPART[3], |
| 140 |
> |
scsamp, ns, wlmin, wlmax); |
| 141 |
> |
smultscolor(r->pcol, scval); |
| 142 |
|
return(0); |
| 143 |
|
} |
