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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