70 lines
1.7 KiB
C++
70 lines
1.7 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
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*
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* This library is open source and may be redistributed and/or modified under
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* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
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* (at your option) any later version. The full license is in LICENSE file
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* included with this distribution, and on the openscenegraph.org website.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* OpenSceneGraph Public License for more details.
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*/
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#include <osg/MatrixTransform>
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using namespace osg;
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MatrixTransform::MatrixTransform():
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_inverseDirty(false)
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{
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}
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MatrixTransform::MatrixTransform(const MatrixTransform& transform,const CopyOp& copyop):
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Transform(transform,copyop),
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_matrix(transform._matrix),
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_inverse(transform._inverse),
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_inverseDirty(transform._inverseDirty)
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{
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}
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MatrixTransform::MatrixTransform(const Matrix& mat )
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{
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_referenceFrame = RELATIVE_RF;
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_matrix = mat;
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_inverseDirty = true;
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}
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MatrixTransform::~MatrixTransform()
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{
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}
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bool MatrixTransform::computeLocalToWorldMatrix(Matrix& matrix,NodeVisitor*) const
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{
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if (_referenceFrame==RELATIVE_RF)
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{
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matrix.preMult(_matrix);
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}
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else // absolute
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{
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matrix = _matrix;
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}
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return true;
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}
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bool MatrixTransform::computeWorldToLocalMatrix(Matrix& matrix,NodeVisitor*) const
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{
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const Matrix& inverse = getInverseMatrix();
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if (_referenceFrame==RELATIVE_RF)
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{
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matrix.postMult(inverse);
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}
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else // absolute
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{
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matrix = inverse;
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}
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return true;
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}
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