1 |
greg |
1.1 |
#ifndef lint |
2 |
greg |
2.4 |
static const char RCSid[] = "$Id$"; |
3 |
greg |
1.1 |
#endif |
4 |
|
|
/* |
5 |
|
|
* p_func.c - routine for procedural patterns. |
6 |
greg |
2.4 |
*/ |
7 |
|
|
|
8 |
|
|
/* ==================================================================== |
9 |
|
|
* The Radiance Software License, Version 1.0 |
10 |
|
|
* |
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 |
greg |
1.1 |
* |
59 |
greg |
2.4 |
* 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 |
greg |
1.1 |
*/ |
64 |
|
|
|
65 |
|
|
#include "ray.h" |
66 |
|
|
|
67 |
greg |
2.2 |
#include "func.h" |
68 |
|
|
|
69 |
greg |
1.1 |
/* |
70 |
|
|
* A procedural pattern can either be a brightness or a |
71 |
|
|
* color function. A brightness function is given as: |
72 |
|
|
* |
73 |
|
|
* modifier brightfunc name |
74 |
|
|
* 2+ bvarname filename xf |
75 |
|
|
* 0 |
76 |
|
|
* n A1 A2 .. |
77 |
|
|
* |
78 |
|
|
* A color function is given as: |
79 |
|
|
* |
80 |
|
|
* modifier colorfunc name |
81 |
|
|
* 4+ rvarname gvarname bvarname filename xf |
82 |
|
|
* 0 |
83 |
|
|
* n A1 A2 .. |
84 |
|
|
* |
85 |
|
|
* Filename is the name of the file where the variable definitions |
86 |
|
|
* can be found. The list of real arguments can be accessed by |
87 |
|
|
* definitions in the file. The xf is a transformation |
88 |
|
|
* to get from the original coordinates to the current coordinates. |
89 |
|
|
*/ |
90 |
|
|
|
91 |
|
|
|
92 |
|
|
p_bfunc(m, r) /* compute brightness pattern */ |
93 |
greg |
2.2 |
OBJREC *m; |
94 |
greg |
1.1 |
RAY *r; |
95 |
|
|
{ |
96 |
|
|
double bval; |
97 |
greg |
2.2 |
register MFUNC *mf; |
98 |
greg |
1.1 |
|
99 |
|
|
if (m->oargs.nsargs < 2) |
100 |
|
|
objerror(m, USER, "bad # arguments"); |
101 |
greg |
2.2 |
mf = getfunc(m, 1, 0x1, 0); |
102 |
|
|
setfunc(m, r); |
103 |
greg |
1.1 |
errno = 0; |
104 |
greg |
2.2 |
bval = evalue(mf->ep[0]); |
105 |
greg |
1.1 |
if (errno) { |
106 |
|
|
objerror(m, WARNING, "compute error"); |
107 |
greg |
2.3 |
return(0); |
108 |
greg |
1.1 |
} |
109 |
|
|
scalecolor(r->pcol, bval); |
110 |
greg |
2.3 |
return(0); |
111 |
greg |
1.1 |
} |
112 |
|
|
|
113 |
|
|
|
114 |
|
|
p_cfunc(m, r) /* compute color pattern */ |
115 |
greg |
2.2 |
OBJREC *m; |
116 |
greg |
1.1 |
RAY *r; |
117 |
|
|
{ |
118 |
|
|
COLOR cval; |
119 |
greg |
2.2 |
register MFUNC *mf; |
120 |
greg |
1.1 |
|
121 |
|
|
if (m->oargs.nsargs < 4) |
122 |
|
|
objerror(m, USER, "bad # arguments"); |
123 |
greg |
2.2 |
mf = getfunc(m, 3, 0x7, 0); |
124 |
|
|
setfunc(m, r); |
125 |
greg |
1.1 |
errno = 0; |
126 |
greg |
2.2 |
setcolor(cval, evalue(mf->ep[0]), |
127 |
|
|
evalue(mf->ep[1]), |
128 |
|
|
evalue(mf->ep[2])); |
129 |
greg |
1.1 |
if (errno) { |
130 |
|
|
objerror(m, WARNING, "compute error"); |
131 |
greg |
2.3 |
return(0); |
132 |
greg |
1.1 |
} |
133 |
|
|
multcolor(r->pcol, cval); |
134 |
greg |
2.3 |
return(0); |
135 |
greg |
1.1 |
} |