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author | Konstantin Käfer <mail@kkaefer.com> | 2014-12-04 18:29:42 +0100 |
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committer | Konstantin Käfer <mail@kkaefer.com> | 2014-12-04 20:02:50 +0100 |
commit | abafb52f37beb5659efc2105ccd1568e1f754898 (patch) | |
tree | 6a60636d3497560ca61e5aae5f6d7061c4f18553 /src/mbgl/util/mat3.cpp | |
parent | bff6aeb4da41dee1f5f1cfa0be81b6c257257253 (diff) | |
download | qtlocation-mapboxgl-abafb52f37beb5659efc2105ccd1568e1f754898.tar.gz |
make most headers private
Diffstat (limited to 'src/mbgl/util/mat3.cpp')
-rw-r--r-- | src/mbgl/util/mat3.cpp | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/src/mbgl/util/mat3.cpp b/src/mbgl/util/mat3.cpp new file mode 100644 index 0000000000..263768ee41 --- /dev/null +++ b/src/mbgl/util/mat3.cpp @@ -0,0 +1,95 @@ +// 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::translate(mat3& out, const mat3& a, float x, float y) { + float a00 = a[0], a01 = a[1], a02 = a[2], + a10 = a[3], a11 = a[4], a12 = a[5], + a20 = a[6], a21 = a[7], a22 = a[8]; + + out[0] = a00; + out[1] = a01; + out[2] = a02; + + out[3] = a10; + out[4] = a11; + out[5] = a12; + + out[6] = x * a00 + y * a10 + a20; + out[7] = x * a01 + y * a11 + a21; + out[8] = x * a02 + y * a12 + a22; +} + +void matrix::rotate(mat3& out, const mat3& a, float rad) { + float s = std::sin(rad), + c = std::cos(rad), + a00 = a[0], + a01 = a[1], + a02 = a[2], + a10 = a[3], + a11 = a[4], + a12 = a[5], + a20 = a[6], + a21 = a[7], + a22 = a[8]; + + out[0] = c * a00 + s * a10; + out[1] = c * a01 + s * a11; + out[2] = c * a02 + s * a12; + + out[3] = c * a10 - s * a00; + out[4] = c * a11 - s * a01; + out[5] = c * a12 - s * a02; + + out[6] = a20; + out[7] = a21; + out[8] = a22; +}; + +void matrix::scale(mat3& out, const mat3& a, float x, 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]; +} |