AtomicGameEngine/Source/Atomic/Math/Matrix2.cpp

//
// Copyright (c) 2008-2017 the Urho3D project.
//
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// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
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// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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#include "../Precompiled.h"

#include "../Math/Matrix2.h"

#include <cstdio>

#include "../DebugNew.h"

namespace Atomic
{

const Matrix2 Matrix2::ZERO(
    0.0f, 0.0f,
    0.0f, 0.0f);

const Matrix2 Matrix2::IDENTITY;

Matrix2 Matrix2::Inverse() const
{
    float det = m00_ * m11_ -
                m01_ * m10_;

    float invDet = 1.0f / det;

    return Matrix2(
        m11_, -m01_,
        -m10_, m00_
    ) * invDet;
}

String Matrix2::ToString() const
{
    char tempBuffer[MATRIX_CONVERSION_BUFFER_LENGTH];
    sprintf(tempBuffer, "%g %g %g %g", m00_, m01_, m10_, m11_);
    return String(tempBuffer);
}
}