root/OpenSceneGraph/trunk/src/osgUtil/TransformAttributeFunctor.cpp @ 13041

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1/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
2 *
3 * This library is open source and may be redistributed and/or modified under
4 * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
5 * (at your option) any later version.  The full license is in LICENSE file
6 * included with this distribution, and on the openscenegraph.org website.
7 *
8 * This library is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
11 * OpenSceneGraph Public License for more details.
12*/
13
14#include <osgUtil/TransformAttributeFunctor>
15
16using namespace osgUtil;
17
18TransformAttributeFunctor::TransformAttributeFunctor(const osg::Matrix& m)
19{
20    _m = m;
21    _im.invert(_m);
22}
23
24TransformAttributeFunctor::~TransformAttributeFunctor()
25{
26}
27
28void TransformAttributeFunctor::apply(osg::Drawable::AttributeType type,unsigned int count,osg::Vec3* begin)
29{
30    if (type == osg::Drawable::VERTICES)
31    {
32        osg::Vec3* end = begin+count;
33        for (osg::Vec3* itr=begin;itr<end;++itr)
34        {
35            (*itr) = (*itr)*_m;
36        }
37    }
38    else if (type == osg::Drawable::NORMALS)
39    {
40        osg::Vec3* end = begin+count;
41        for (osg::Vec3* itr=begin;itr<end;++itr)
42        {
43            // note post mult by inverse for normals.
44            (*itr) = osg::Matrix::transform3x3(_im,(*itr));
45            (*itr).normalize();
46        }
47    }
48}
49
50void TransformAttributeFunctor::apply(osg::Drawable::AttributeType type,unsigned int count,osg::Vec3d* begin)
51{
52    if (type == osg::Drawable::VERTICES)
53    {
54        osg::Vec3d* end = begin+count;
55        for (osg::Vec3d* itr=begin;itr<end;++itr)
56        {
57            (*itr) = (*itr)*_m;
58        }
59    }
60    else if (type == osg::Drawable::NORMALS)
61    {
62        osg::Vec3d* end = begin+count;
63        for (osg::Vec3d* itr=begin;itr<end;++itr)
64        {
65            // note post mult by inverse for normals.
66            (*itr) = osg::Matrix::transform3x3(_im,(*itr));
67            (*itr).normalize();
68        }
69    }
70}
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