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// This is an incomplete port of http://glmatrix.net/
//
// Copyright (c) 2013 Brandon Jones, Colin MacKenzie IV
//
// This software is provided 'as-is', without any express or implied warranty.
// In no event will the authors be held liable for any damages arising from the
// use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it
// freely, subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented; you must not claim
// that you wrote the original software. If you use this software in a
// product, an acknowledgment in the product documentation would be
// appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such, and must not be
// misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source distribution.
#include <mbgl/util/mat3.hpp>
#include <cmath>
using namespace mbgl;
void matrix::identity(mat3& out) {
out[0] = 1.0f;
out[1] = 0.0f;
out[2] = 0.0f;
out[3] = 0.0f;
out[4] = 1.0f;
out[5] = 0.0f;
out[6] = 0.0f;
out[7] = 0.0f;
out[8] = 1.0f;
}
void matrix::scale(mat3& out, const mat3& a, const float x, const float y) {
out[0] = x * a[0];
out[1] = x * a[1];
out[2] = x * a[2];
out[3] = y * a[3];
out[4] = y * a[4];
out[5] = y * a[5];
out[6] = a[6];
out[7] = a[7];
out[8] = a[8];
}
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