FixedMatrixGetter.h

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//-----------------------------------------------------------------------------------
//
// Pro-Vocation Light Engine (PVLE)
// Copyright (C) 2007-2009  Sukender, KinoX & Buzib
// For more information, contact us : sukender@free.fr
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
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// (at your option) any later version.
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// General Public License, please contact the authors for alternative
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// This program is distributed in the hope that it will be useful,
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
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//-----------------------------------------------------------------------------------

#ifndef INPUT_FIXED_MATRIX_GETTER_H
#define INPUT_FIXED_MATRIX_GETTER_H

//#include <PVLE/Export.h>
#include <PVLE/Input/MatrixGetter.h>

class /*PVLE_EXPORT*/ FixedMatrixGetter : public MatrixGetter {
public:
    FixedMatrixGetter() { setByFrame( osg::Vec3(100,0,10), osg::Vec3(-1,0,0), osg::Vec3(0,0,1)); }
    FixedMatrixGetter(const osg::Vec3 & EyePos, const osg::Vec3 & Dir, const osg::Vec3 & Up) { setByFrame(EyePos, Dir, Up); }
    FixedMatrixGetter(const osg::Matrix & matrix) { setByMatrix(matrix); }

    void setByFrame(const osg::Vec3 & EyePos, osg::Vec3 Dir, osg::Vec3 Up) {
        Dir.normalize();
        Up.normalize();
        setByInverseMatrix(osg::Matrix::lookAt(EyePos, EyePos+Dir, Up));
    }

    void setByMatrix(const osg::Matrix & matrix) {
        mat = osg::Matrix::rotate(-osg::PI_2, osg::Vec3(1,0,0)) * matrix;
        invMat = osg::Matrix::inverse(matrix) * osg::Matrix::rotate(osg::PI_2, osg::Vec3(1,0,0));
    }
    void setByInverseMatrix(const osg::Matrix & matrix) {
        invMat = matrix * osg::Matrix::rotate(osg::PI_2, osg::Vec3(1,0,0));
        mat = osg::Matrix::rotate(-osg::PI_2, osg::Vec3(1,0,0)) * osg::Matrix::inverse(matrix);
    }

    virtual osg::Matrix getMatrix() const { return mat; }
    virtual osg::Matrix getInverseMatrix() const { return invMat; }

protected:
    osg::Matrix mat, invMat;
};

#endif  // INPUT_FIXED_MATRIX_GETTER_H

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