77e7846756
- puts function definitions in a namespace ... {} rather than using namespace ...;
- remove trailing whitespace
- add trailing newline
- protect SQL statements from being formatted by clang-format
55 lines
1.7 KiB
C++
55 lines
1.7 KiB
C++
// This is an incomplete port of http://glmatrix.net/
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//
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// Copyright (c) 2013 Brandon Jones, Colin MacKenzie IV
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//
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// This software is provided 'as-is', without any express or implied warranty.
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// In no event will the authors be held liable for any damages arising from the
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// use of this software.
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//
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// Permission is granted to anyone to use this software for any purpose,
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// including commercial applications, and to alter it and redistribute it
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// freely, subject to the following restrictions:
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//
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// 1. The origin of this software must not be misrepresented; you must not claim
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// that you wrote the original software. If you use this software in a
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// product, an acknowledgment in the product documentation would be
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// appreciated but is not required.
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//
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// 2. Altered source versions must be plainly marked as such, and must not be
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// misrepresented as being the original software.
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//
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// 3. This notice may not be removed or altered from any source distribution.
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#include <mbgl/util/mat2.hpp>
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#include <cmath>
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namespace mbgl {
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void matrix::identity(mat2& out) {
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out[0] = 1.0f;
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out[1] = 0.0f;
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out[2] = 0.0f;
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out[3] = 1.0f;
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}
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void matrix::rotate(mat2& out, const mat2& a, double rad) {
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double a0 = a[0], a1 = a[1], a2 = a[2], a3 = a[3],
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s = std::sin(rad),
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c = std::cos(rad);
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out[0] = a0 * c + a2 * s;
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out[1] = a1 * c + a3 * s;
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out[2] = a0 * -s + a2 * c;
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out[3] = a1 * -s + a3 * c;
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}
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void matrix::scale(mat2& out, const mat2& a, double v0, double v1) {
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double a0 = a[0], a1 = a[1], a2 = a[2], a3 = a[3];
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out[0] = a0 * v0;
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out[1] = a1 * v0;
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out[2] = a2 * v1;
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out[3] = a3 * v1;
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}
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} // namespace mbgl
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