add BLI_strcpy_rlen, replace strcat, which was used in misleading way.
[blender.git] / intern / cycles / subd / subd_stencil.cpp
1 /*
2  * Copyright 2011, Blender Foundation.
3  *
4  * This program is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU General Public License
6  * as published by the Free Software Foundation; either version 2
7  * of the License, or (at your option) any later version.
8  *
9  * This program is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12  * GNU General Public License for more details.
13  *
14  * You should have received a copy of the GNU General Public License
15  * along with this program; if not, write to the Free Software Foundation,
16  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
17  */
18
19 #include "subd_stencil.h"
20
21 #include "util_debug.h"
22 #include "util_math.h"
23
24 CCL_NAMESPACE_BEGIN
25
26 StencilMask::StencilMask()
27 {
28 }
29
30 StencilMask::StencilMask(int size)
31 {
32         /* initialize weights to zero. */
33         weights.resize(size, 0.0f);
34 }
35
36 void StencilMask::resize(int size)
37 {
38         weights.resize(size, 0.0f);
39 }
40
41 StencilMask& StencilMask::operator=(float value)
42 {
43         const int size = weights.size();
44         for(int i = 0; i < size; i++)
45                 weights[i] = value;
46
47         return *this;
48 }
49
50 void StencilMask::operator+=(const StencilMask& mask)
51 {
52         assert(mask.size() == size());
53         
54         const int size = weights.size();
55         for(int i = 0; i < size; i++)
56                 weights[i] += mask.weights[i];
57 }
58
59 void StencilMask::operator-=(const StencilMask& mask)
60 {
61         assert(mask.size() == size());
62         
63         const int size = weights.size();
64         for(int i = 0; i < size; i++)
65                 weights[i] -= mask.weights[i];
66 }
67
68 void StencilMask::operator*=(float scale)
69 {
70         const int size = weights.size();
71
72         for(int i = 0; i < size; i++)
73                 weights[i] *= scale;
74 }
75
76 void StencilMask::operator/=(float scale)
77 {
78         *this *= 1.0f/scale;
79 }
80
81 float StencilMask::sum() const
82 {
83         float total = 0.0f;
84         const int size = weights.size();
85
86         for(int i = 0; i < size; i++)
87                 total += weights[i];
88         
89         return total;
90 }
91
92 bool StencilMask::is_normalized() const
93 {
94         return fabsf(sum() - 1.0f) < 0.0001f;
95 }
96
97 void StencilMask::normalize()
98 {
99         *this /= sum();
100 }
101
102 CCL_NAMESPACE_END
103