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91 lines
2.2 KiB
C++
91 lines
2.2 KiB
C++
/*
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OpenMW - The completely unofficial reimplementation of Morrowind
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Copyright (C) 2008-2010 Nicolay Korslund
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Email: < korslund@gmail.com >
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WWW: https://openmw.org/
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This file (nif_types.h) is part of the OpenMW package.
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OpenMW is distributed as free software: you can redistribute it
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and/or modify it under the terms of the GNU General Public License
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version 3, as published by the Free Software Foundation.
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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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You should have received a copy of the GNU General Public License
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version 3 along with this program. If not, see
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https://www.gnu.org/licenses/ .
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*/
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#ifndef OPENMW_COMPONENTS_NIF_NIFTYPES_HPP
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#define OPENMW_COMPONENTS_NIF_NIFTYPES_HPP
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#include <osg/Vec3f>
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#include <osg/Matrixf>
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// Common types used in NIF files
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namespace Nif
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{
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struct Matrix3
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{
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float mValues[3][3];
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Matrix3()
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{
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for (int i=0;i<3;++i)
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for (int j=0;j<3;++j)
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mValues[i][j] = (i==j) ? 1.f : 0.f;
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}
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bool isIdentity() const
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{
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for (int i=0;i<3;++i)
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for (int j=0;j<3;++j)
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if ((i==j) != (mValues[i][j] == 1))
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return false;
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return true;
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}
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};
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struct Transformation
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{
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osg::Vec3f pos;
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Matrix3 rotation; // this can contain scale components too, including negative and nonuniform scales
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float scale;
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osg::Matrixf toMatrix() const
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{
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osg::Matrixf transform;
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transform.setTrans(pos);
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for (int i=0;i<3;++i)
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for (int j=0;j<3;++j)
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transform(j,i) = rotation.mValues[i][j] * scale; // NB column/row major difference
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return transform;
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}
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bool isIdentity() const
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{
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return pos == osg::Vec3f(0,0,0)
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&& rotation.isIdentity() && scale == 1.f;
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}
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static const Transformation& getIdentity()
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{
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static const Transformation identity = {
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osg::Vec3f(), Matrix3(), 1.0f
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};
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return identity;
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}
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};
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} // Namespace
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#endif
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