3 * Copyright (C) 2006-2007 Mathias Froehlich
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.
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.
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,
23 # include <simgear_config.h>
26 #include <osgDB/Registry>
27 #include <osgDB/Input>
28 #include <osgDB/Output>
30 #include "SGScaleTransform.hxx"
32 SGScaleTransform::SGScaleTransform() :
34 _scaleFactor(1, 1, 1),
37 setReferenceFrame(RELATIVE_RF);
40 SGScaleTransform::SGScaleTransform(const SGScaleTransform& scale,
41 const osg::CopyOp& copyop) :
42 osg::Transform(scale, copyop),
43 _center(scale._center),
44 _scaleFactor(scale._scaleFactor),
45 _boundScale(scale._boundScale)
50 SGScaleTransform::computeLocalToWorldMatrix(osg::Matrix& matrix,
51 osg::NodeVisitor* nv) const
53 osg::Matrix transform;
54 transform(0,0) = _scaleFactor[0];
55 transform(1,1) = _scaleFactor[1];
56 transform(2,2) = _scaleFactor[2];
57 transform(3,0) = _center[0]*(1 - _scaleFactor[0]);
58 transform(3,1) = _center[1]*(1 - _scaleFactor[1]);
59 transform(3,2) = _center[2]*(1 - _scaleFactor[2]);
60 if (_referenceFrame == RELATIVE_RF)
61 matrix.preMult(transform);
68 SGScaleTransform::computeWorldToLocalMatrix(osg::Matrix& matrix,
69 osg::NodeVisitor* nv) const
71 if (fabs(_scaleFactor[0]) < SGLimitsd::min())
73 if (fabs(_scaleFactor[1]) < SGLimitsd::min())
75 if (fabs(_scaleFactor[2]) < SGLimitsd::min())
77 SGVec3d rScaleFactor(1/_scaleFactor[0],
80 osg::Matrix transform;
81 transform(0,0) = rScaleFactor[0];
82 transform(1,1) = rScaleFactor[1];
83 transform(2,2) = rScaleFactor[2];
84 transform(3,0) = _center[0]*(1 - rScaleFactor[0]);
85 transform(3,1) = _center[1]*(1 - rScaleFactor[1]);
86 transform(3,2) = _center[2]*(1 - rScaleFactor[2]);
87 if (_referenceFrame == RELATIVE_RF)
88 matrix.postMult(transform);
95 SGScaleTransform::computeBound() const
97 osg::BoundingSphere bs = osg::Group::computeBound();
98 _boundScale = normI(_scaleFactor);
99 bs.radius() *= _boundScale;
105 bool ScaleTransform_readLocalData(osg::Object& obj, osgDB::Input& fr)
107 SGScaleTransform& scale = static_cast<SGScaleTransform&>(obj);
108 if (fr[0].matchWord("center")) {
111 if (fr.readSequence(center))
115 scale.setCenter(toSG(center));
117 if (fr[0].matchWord("scaleFactor")) {
119 osg::Vec3d scaleFactor;
120 if (fr.readSequence(scaleFactor))
124 scale.setScaleFactor(toSG(scaleFactor));
129 bool ScaleTransform_writeLocalData(const osg::Object& obj, osgDB::Output& fw)
131 const SGScaleTransform& scale = static_cast<const SGScaleTransform&>(obj);
132 const SGVec3d& center = scale.getCenter();
133 const SGVec3d& scaleFactor = scale.getScaleFactor();
134 int prec = fw.precision();
136 fw.indent() << "center ";
137 for (int i = 0; i < 3; i++)
138 fw << center(i) << " ";
141 fw.indent() << "scaleFactor ";
142 for (int i = 0; i < 3; i++)
143 fw << scaleFactor(i) << " ";
150 osgDB::RegisterDotOsgWrapperProxy g_ScaleTransformProxy
152 new SGScaleTransform,
154 "Object Node Transform SGScaleTransform Group",
155 &ScaleTransform_readLocalData,
156 &ScaleTransform_writeLocalData