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Fix VS2010 lack of fminf
[simgear.git] / simgear / scene / util / SGEnlargeBoundingBox.cxx
1 /* -*-c++-*-
2  *
3  * Copyright (C) 2006-2007 Mathias Froehlich 
4  *
5  * This program is free software; you can redistribute it and/or
6  * modify it under the terms of the GNU General Public License as
7  * published by the Free Software Foundation; either version 2 of the
8  * License, or (at your option) any later version.
9  *
10  * This program is distributed in the hope that it will be useful, but
11  * WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13  * General Public License for more details.
14  *
15  * You should have received a copy of the GNU General Public License
16  * along with this program; if not, write to the Free Software
17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
18  * MA 02110-1301, USA.
19  *
20  */
21
22 #ifdef HAVE_CONFIG_H
23 #  include <simgear_config.h>
24 #endif
25
26 #include "SGEnlargeBoundingBox.hxx"
27
28 #include <osg/Drawable>
29 #include <osg/Version>
30
31 SGEnlargeBoundingBox::SGEnlargeBoundingBox(float offset) :
32   _offset(offset)
33 {
34 }
35
36 SGEnlargeBoundingBox::SGEnlargeBoundingBox(const SGEnlargeBoundingBox& cb,
37                                            const osg::CopyOp& copyOp) :
38   osg::Drawable::ComputeBoundingBoxCallback(cb, copyOp),
39   _offset(cb._offset)
40 {
41 }
42
43 osg::BoundingBox
44 SGEnlargeBoundingBox::computeBound(const osg::Drawable& drawable) const
45 {
46   osg::BoundingBox bound =
47 #if OSG_VERSION_LESS_THAN(3,3,2)
48     drawable.computeBound();
49 #else
50     drawable.computeBoundingBox();
51 #endif
52
53   if (!bound.valid())
54     return bound;
55   return osg::BoundingBox(bound._min - osg::Vec3(_offset, _offset, _offset),
56                           bound._max + osg::Vec3(_offset, _offset, _offset));
57 }