1 // This is an incomplete port of http://glmatrix.net/ 2 // 3 // Copyright (c) 2013 Brandon Jones, Colin MacKenzie IV 4 // 5 // This software is provided 'as-is', without any express or implied warranty. 6 // In no event will the authors be held liable for any damages arising from the 7 // use of this software. 8 // 9 // Permission is granted to anyone to use this software for any purpose, 10 // including commercial applications, and to alter it and redistribute it 11 // freely, subject to the following restrictions: 12 // 13 // 1. The origin of this software must not be misrepresented; you must not claim 14 // that you wrote the original software. If you use this software in a 15 // product, an acknowledgment in the product documentation would be 16 // appreciated but is not required. 17 // 18 // 2. Altered source versions must be plainly marked as such, and must not be 19 // misrepresented as being the original software. 20 // 21 // 3. This notice may not be removed or altered from any source distribution. 22 23 #pragma once 24 25 #include <array> 26 27 namespace mbgl { 28 29 using mat2 = std::array<double, 4>; 30 31 namespace matrix { 32 33 void identity(mat2& out); 34 void rotate(mat2& out, const mat2& a, double rad); 35 void scale(mat2& out, const mat2& a, double v0, double v1); 36 37 } // namespace matrix 38 } // namespace mbgl 39