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openmw-tes3coop/components/nif/niftypes.hpp

91 lines
2.2 KiB
C++

/*
OpenMW - The completely unofficial reimplementation of Morrowind
Copyright (C) 2008-2010 Nicolay Korslund
Email: < korslund@gmail.com >
WWW: https://openmw.org/
This file (nif_types.h) is part of the OpenMW package.
OpenMW is distributed as free software: you can redistribute it
and/or modify it under the terms of the GNU General Public License
version 3, as published by the Free Software Foundation.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
version 3 along with this program. If not, see
https://www.gnu.org/licenses/ .
*/
#ifndef OPENMW_COMPONENTS_NIF_NIFTYPES_HPP
#define OPENMW_COMPONENTS_NIF_NIFTYPES_HPP
#include <osg/Vec3f>
#include <osg/Matrixf>
// Common types used in NIF files
namespace Nif
{
struct Matrix3
{
float mValues[3][3];
Matrix3()
{
for (int i=0;i<3;++i)
for (int j=0;j<3;++j)
mValues[i][j] = (i==j) ? 1.f : 0.f;
}
bool isIdentity() const
{
for (int i=0;i<3;++i)
for (int j=0;j<3;++j)
if ((i==j) != (mValues[i][j] == 1))
return false;
return true;
}
};
struct Transformation
{
osg::Vec3f pos;
Matrix3 rotation; // this can contain scale components too, including negative and nonuniform scales
float scale;
osg::Matrixf toMatrix() const
{
osg::Matrixf transform;
transform.setTrans(pos);
for (int i=0;i<3;++i)
for (int j=0;j<3;++j)
transform(j,i) = rotation.mValues[i][j] * scale; // NB column/row major difference
return transform;
}
bool isIdentity() const
{
return pos == osg::Vec3f(0,0,0)
&& rotation.isIdentity() && scale == 1.f;
}
static const Transformation& getIdentity()
{
static const Transformation identity = {
osg::Vec3f(), Matrix3(), 1.0f
};
return identity;
}
};
} // Namespace
#endif