166a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis/* Copyright (c) 2013, Brandon Jones, Colin MacKenzie IV. All rights reserved. 266a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 366a37686207944273ced825e0e8b6b6375f8c3deJamie GennisRedistribution and use in source and binary forms, with or without modification, 466a37686207944273ced825e0e8b6b6375f8c3deJamie Gennisare permitted provided that the following conditions are met: 566a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 666a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * Redistributions of source code must retain the above copyright notice, this 766a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis list of conditions and the following disclaimer. 866a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * Redistributions in binary form must reproduce the above copyright notice, 966a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis this list of conditions and the following disclaimer in the documentation 1066a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis and/or other materials provided with the distribution. 1166a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 1266a37686207944273ced825e0e8b6b6375f8c3deJamie GennisTHIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND 1366a37686207944273ced825e0e8b6b6375f8c3deJamie GennisANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 1466a37686207944273ced825e0e8b6b6375f8c3deJamie GennisWARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 1566a37686207944273ced825e0e8b6b6375f8c3deJamie GennisDISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR 1666a37686207944273ced825e0e8b6b6375f8c3deJamie GennisANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 1766a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 1866a37686207944273ced825e0e8b6b6375f8c3deJamie GennisLOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON 1966a37686207944273ced825e0e8b6b6375f8c3deJamie GennisANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 2066a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 2166a37686207944273ced825e0e8b6b6375f8c3deJamie GennisSOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ 2266a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 2366a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis/** 2466a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * @class 2x2 Matrix 2566a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * @name mat2 2666a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis */ 2766a37686207944273ced825e0e8b6b6375f8c3deJamie Gennisvar mat2 = {}; 2866a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 2966a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis/** 3066a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * Creates a new identity mat2 3166a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * 3266a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * @returns {mat2} a new 2x2 matrix 3366a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis */ 3466a37686207944273ced825e0e8b6b6375f8c3deJamie Gennismat2.create = function() { 3566a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis var out = new GLMAT_ARRAY_TYPE(4); 3666a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis out[0] = 1; 3766a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis out[1] = 0; 3866a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis out[2] = 0; 3966a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis out[3] = 1; 4066a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis return out; 4166a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis}; 4266a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 4366a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis/** 4466a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * Creates a new mat2 initialized with values from an existing matrix 4566a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * 4666a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * @param {mat2} a matrix to clone 4766a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * @returns {mat2} a new 2x2 matrix 4866a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis */ 4966a37686207944273ced825e0e8b6b6375f8c3deJamie Gennismat2.clone = function(a) { 5066a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis var out = new GLMAT_ARRAY_TYPE(4); 5166a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis out[0] = a[0]; 5266a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis out[1] = a[1]; 5366a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis out[2] = a[2]; 5466a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis out[3] = a[3]; 5566a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis return out; 5666a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis}; 5766a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 5866a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis/** 5966a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * Copy the values from one mat2 to another 6066a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * 6166a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * @param {mat2} out the receiving matrix 6266a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * @param {mat2} a the source matrix 6366a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * @returns {mat2} out 6466a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis */ 6566a37686207944273ced825e0e8b6b6375f8c3deJamie Gennismat2.copy = function(out, a) { 6666a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis out[0] = a[0]; 6766a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis out[1] = a[1]; 6866a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis out[2] = a[2]; 6966a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis out[3] = a[3]; 7066a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis return out; 7166a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis}; 7266a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 7366a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis/** 7466a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * Set a mat2 to the identity matrix 7566a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * 7666a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * @param {mat2} out the receiving matrix 7766a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * @returns {mat2} out 7866a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis */ 7966a37686207944273ced825e0e8b6b6375f8c3deJamie Gennismat2.identity = function(out) { 8066a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis out[0] = 1; 8166a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis out[1] = 0; 8266a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis out[2] = 0; 8366a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis out[3] = 1; 8466a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis return out; 8566a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis}; 8666a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 8766a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis/** 8866a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * Transpose the values of a mat2 8966a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * 9066a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * @param {mat2} out the receiving matrix 9166a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * @param {mat2} a the source matrix 9266a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * @returns {mat2} out 9366a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis */ 9466a37686207944273ced825e0e8b6b6375f8c3deJamie Gennismat2.transpose = function(out, a) { 9566a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis // If we are transposing ourselves we can skip a few steps but have to cache some values 9666a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis if (out === a) { 9766a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis var a1 = a[1]; 9866a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis out[1] = a[2]; 9966a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis out[2] = a1; 10066a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis } else { 10166a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis out[0] = a[0]; 10266a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis out[1] = a[2]; 10366a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis out[2] = a[1]; 10466a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis out[3] = a[3]; 10566a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis } 10666a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 10766a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis return out; 10866a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis}; 10966a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 11066a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis/** 11166a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * Inverts a mat2 11266a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * 11366a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * @param {mat2} out the receiving matrix 11466a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * @param {mat2} a the source matrix 11566a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * @returns {mat2} out 11666a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis */ 11766a37686207944273ced825e0e8b6b6375f8c3deJamie Gennismat2.invert = function(out, a) { 11866a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis var a0 = a[0], a1 = a[1], a2 = a[2], a3 = a[3], 11966a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 12066a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis // Calculate the determinant 12166a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis det = a0 * a3 - a2 * a1; 12266a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 12366a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis if (!det) { 12466a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis return null; 12566a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis } 12666a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis det = 1.0 / det; 12766a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 12866a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis out[0] = a3 * det; 12966a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis out[1] = -a1 * det; 13066a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis out[2] = -a2 * det; 13166a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis out[3] = a0 * det; 13266a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 13366a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis return out; 13466a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis}; 13566a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 13666a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis/** 13766a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * Calculates the adjugate of a mat2 13866a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * 13966a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * @param {mat2} out the receiving matrix 14066a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * @param {mat2} a the source matrix 14166a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * @returns {mat2} out 14266a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis */ 14366a37686207944273ced825e0e8b6b6375f8c3deJamie Gennismat2.adjoint = function(out, a) { 14466a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis // Caching this value is nessecary if out == a 14566a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis var a0 = a[0]; 14666a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis out[0] = a[3]; 14766a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis out[1] = -a[1]; 14866a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis out[2] = -a[2]; 14966a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis out[3] = a0; 15066a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 15166a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis return out; 15266a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis}; 15366a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 15466a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis/** 15566a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * Calculates the determinant of a mat2 15666a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * 15766a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * @param {mat2} a the source matrix 15866a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * @returns {Number} determinant of a 15966a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis */ 16066a37686207944273ced825e0e8b6b6375f8c3deJamie Gennismat2.determinant = function (a) { 16166a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis return a[0] * a[3] - a[2] * a[1]; 16266a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis}; 16366a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 16466a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis/** 16566a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * Multiplies two mat2's 16666a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * 16766a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * @param {mat2} out the receiving matrix 16866a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * @param {mat2} a the first operand 16966a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * @param {mat2} b the second operand 17066a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * @returns {mat2} out 17166a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis */ 17266a37686207944273ced825e0e8b6b6375f8c3deJamie Gennismat2.multiply = function (out, a, b) { 17366a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis var a0 = a[0], a1 = a[1], a2 = a[2], a3 = a[3]; 17466a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis var b0 = b[0], b1 = b[1], b2 = b[2], b3 = b[3]; 17566a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis out[0] = a0 * b0 + a1 * b2; 17666a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis out[1] = a0 * b1 + a1 * b3; 17766a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis out[2] = a2 * b0 + a3 * b2; 17866a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis out[3] = a2 * b1 + a3 * b3; 17966a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis return out; 18066a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis}; 18166a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 18266a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis/** 18366a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * Alias for {@link mat2.multiply} 18466a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * @function 18566a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis */ 18666a37686207944273ced825e0e8b6b6375f8c3deJamie Gennismat2.mul = mat2.multiply; 18766a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 18866a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis/** 18966a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * Rotates a mat2 by the given angle 19066a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * 19166a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * @param {mat2} out the receiving matrix 19266a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * @param {mat2} a the matrix to rotate 19366a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * @param {Number} rad the angle to rotate the matrix by 19466a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * @returns {mat2} out 19566a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis */ 19666a37686207944273ced825e0e8b6b6375f8c3deJamie Gennismat2.rotate = function (out, a, rad) { 19766a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis var a0 = a[0], a1 = a[1], a2 = a[2], a3 = a[3], 19866a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis s = Math.sin(rad), 19966a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis c = Math.cos(rad); 20066a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis out[0] = a0 * c + a1 * s; 20166a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis out[1] = a0 * -s + a1 * c; 20266a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis out[2] = a2 * c + a3 * s; 20366a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis out[3] = a2 * -s + a3 * c; 20466a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis return out; 20566a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis}; 20666a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 20766a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis/** 20866a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * Scales the mat2 by the dimensions in the given vec2 20966a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * 21066a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * @param {mat2} out the receiving matrix 21166a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * @param {mat2} a the matrix to rotate 21266a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * @param {vec2} v the vec2 to scale the matrix by 21366a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * @returns {mat2} out 21466a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis **/ 21566a37686207944273ced825e0e8b6b6375f8c3deJamie Gennismat2.scale = function(out, a, v) { 21666a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis var a0 = a[0], a1 = a[1], a2 = a[2], a3 = a[3], 21766a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis v0 = v[0], v1 = v[1]; 21866a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis out[0] = a0 * v0; 21966a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis out[1] = a1 * v1; 22066a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis out[2] = a2 * v0; 22166a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis out[3] = a3 * v1; 22266a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis return out; 22366a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis}; 22466a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 22566a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis/** 22666a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * Returns a string representation of a mat2 22766a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * 22866a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * @param {mat2} mat matrix to represent as a string 22966a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * @returns {String} string representation of the matrix 23066a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis */ 23166a37686207944273ced825e0e8b6b6375f8c3deJamie Gennismat2.str = function (a) { 23266a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis return 'mat2(' + a[0] + ', ' + a[1] + ', ' + a[2] + ', ' + a[3] + ')'; 23366a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis}; 23466a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 23566a37686207944273ced825e0e8b6b6375f8c3deJamie Gennisif(typeof(exports) !== 'undefined') { 23666a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis exports.mat2 = mat2; 23766a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis} 238