| 1 | /* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield |
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| 2 | * |
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| 3 | * This library is open source and may be redistributed and/or modified under |
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| 4 | * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or |
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| 5 | * (at your option) any later version. The full license is in LICENSE file |
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| 6 | * included with this distribution, and on the openscenegraph.org website. |
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| 7 | * |
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| 8 | * This library is distributed in the hope that it will be useful, |
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| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 11 | * OpenSceneGraph Public License for more details. |
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| 12 | */ |
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| 13 | |
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| 14 | #ifndef OSG_MATRIXTRANSFORM |
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| 15 | #define OSG_MATRIXTRANSFORM 1 |
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| 16 | |
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| 17 | #include <osg/Transform> |
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| 18 | |
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| 19 | namespace osg { |
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| 20 | |
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| 21 | /** MatrixTransform - is a subclass of Transform which has an osg::Matrix |
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| 22 | * which represents a 4x4 transformation of its children from local coordinates |
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| 23 | * into the Transform's parent coordinates. |
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| 24 | */ |
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| 25 | class OSG_EXPORT MatrixTransform : public Transform |
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| 26 | { |
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| 27 | public : |
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| 28 | |
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| 29 | |
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| 30 | MatrixTransform(); |
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| 31 | |
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| 32 | /** Copy constructor using CopyOp to manage deep vs shallow copy.*/ |
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| 33 | MatrixTransform(const MatrixTransform&,const CopyOp& copyop=CopyOp::SHALLOW_COPY); |
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| 34 | |
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| 35 | MatrixTransform(const Matrix& matix); |
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| 36 | |
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| 37 | META_Node(osg, MatrixTransform); |
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| 38 | |
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| 39 | virtual MatrixTransform* asMatrixTransform() { return this; } |
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| 40 | virtual const MatrixTransform* asMatrixTransform() const { return this; } |
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| 41 | |
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| 42 | |
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| 43 | /** Set the transform's matrix.*/ |
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| 44 | void setMatrix(const Matrix& mat) { _matrix = mat; _inverseDirty=true; dirtyBound(); } |
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| 45 | |
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| 46 | /** Get the matrix. */ |
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| 47 | inline const Matrix& getMatrix() const { return _matrix; } |
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| 48 | |
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| 49 | /** pre multiply the transform's matrix.*/ |
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| 50 | void preMult(const Matrix& mat) { _matrix.preMult(mat); _inverseDirty=true; dirtyBound(); } |
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| 51 | |
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| 52 | /** post multiply the transform's matrix.*/ |
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| 53 | void postMult(const Matrix& mat) { _matrix.postMult(mat); _inverseDirty=true; dirtyBound(); } |
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| 54 | |
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| 55 | /** Get the inverse matrix. */ |
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| 56 | inline const Matrix& getInverseMatrix() const |
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| 57 | { |
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| 58 | if (_inverseDirty) |
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| 59 | { |
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| 60 | _inverse.invert(_matrix); |
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| 61 | _inverseDirty = false; |
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| 62 | } |
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| 63 | return _inverse; |
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| 64 | } |
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| 65 | |
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| 66 | virtual bool computeLocalToWorldMatrix(Matrix& matrix,NodeVisitor*) const; |
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| 67 | |
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| 68 | virtual bool computeWorldToLocalMatrix(Matrix& matrix,NodeVisitor*) const; |
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| 69 | |
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| 70 | |
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| 71 | protected : |
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| 72 | |
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| 73 | virtual ~MatrixTransform(); |
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| 74 | |
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| 75 | Matrix _matrix; |
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| 76 | mutable Matrix _inverse; |
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| 77 | mutable bool _inverseDirty; |
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| 78 | |
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| 79 | |
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| 80 | }; |
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| 81 | |
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| 82 | } |
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| 83 | |
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| 84 | #endif |
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