frohlich
487701a143
simgear/scene/model/Makefile.am simgear/scene/model/animation.cxx simgear/scene/model/animation.hxx Added Files: simgear/scene/model/SGRotateTransform.cxx simgear/scene/model/SGRotateTransform.hxx simgear/scene/model/SGScaleTransform.cxx simgear/scene/model/SGScaleTransform.hxx simgear/scene/model/SGTranslateTransform.cxx simgear/scene/model/SGTranslateTransform.hxx: Factor out some useful classes.
110 lines
3.4 KiB
C++
110 lines
3.4 KiB
C++
/* -*-c++-*-
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*
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* Copyright (C) 2006-2007 Mathias Froehlich
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*
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*/
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/* -*-c++-*-
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*
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* Copyright (C) 2006-2007 Mathias Froehlich
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*
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*/
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#ifdef HAVE_CONFIG_H
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# include <simgear_config.h>
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#endif
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#include "SGScaleTransform.hxx"
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SGScaleTransform::SGScaleTransform() :
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_center(0, 0, 0),
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_scaleFactor(1, 1, 1),
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_boundScale(1)
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{
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setReferenceFrame(RELATIVE_RF);
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}
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bool
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SGScaleTransform::computeLocalToWorldMatrix(osg::Matrix& matrix,
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osg::NodeVisitor* nv) const
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{
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osg::Matrix transform;
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transform(0,0) = _scaleFactor[0];
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transform(1,1) = _scaleFactor[1];
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transform(2,2) = _scaleFactor[2];
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transform(3,0) = _center[0]*(1 - _scaleFactor[0]);
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transform(3,1) = _center[1]*(1 - _scaleFactor[1]);
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transform(3,2) = _center[2]*(1 - _scaleFactor[2]);
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if (_referenceFrame == RELATIVE_RF)
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matrix.preMult(transform);
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else
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matrix = transform;
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return true;
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}
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bool
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SGScaleTransform::computeWorldToLocalMatrix(osg::Matrix& matrix,
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osg::NodeVisitor* nv) const
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{
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if (fabs(_scaleFactor[0]) < SGLimitsd::min())
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return false;
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if (fabs(_scaleFactor[1]) < SGLimitsd::min())
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return false;
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if (fabs(_scaleFactor[2]) < SGLimitsd::min())
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return false;
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SGVec3d rScaleFactor(1/_scaleFactor[0],
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1/_scaleFactor[1],
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1/_scaleFactor[2]);
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osg::Matrix transform;
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transform(0,0) = rScaleFactor[0];
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transform(1,1) = rScaleFactor[1];
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transform(2,2) = rScaleFactor[2];
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transform(3,0) = _center[0]*(1 - rScaleFactor[0]);
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transform(3,1) = _center[1]*(1 - rScaleFactor[1]);
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transform(3,2) = _center[2]*(1 - rScaleFactor[2]);
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if (_referenceFrame == RELATIVE_RF)
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matrix.postMult(transform);
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else
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matrix = transform;
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return true;
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}
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osg::BoundingSphere
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SGScaleTransform::computeBound() const
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{
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osg::BoundingSphere bs = osg::Group::computeBound();
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_boundScale = normI(_scaleFactor);
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bs.radius() *= _boundScale;
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return bs;
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}
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