Scripts/OtherJs/eCharts/zrender-master/src/tool/matrix.js

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define(
    function () {

        var ArrayCtor = typeof Float32Array === 'undefined'
            ? Array
            : Float32Array;
        /**
         * 3x2矩阵操作类
         * @exports zrender/tool/matrix
         */
        var matrix = {
            /**
             * 创建一个单位矩阵
             * @return {Float32Array|Array.<number>}
             */
            create : function() {
                var out = new ArrayCtor(6);
                matrix.identity(out);
                
                return out;
            },
            /**
             * 设置矩阵为单位矩阵
             * @param {Float32Array|Array.<number>} out
             */
            identity : function(out) {
                out[0] = 1;
                out[1] = 0;
                out[2] = 0;
                out[3] = 1;
                out[4] = 0;
                out[5] = 0;
                return out;
            },
            /**
             * 复制矩阵
             * @param {Float32Array|Array.<number>} out
             * @param {Float32Array|Array.<number>} m
             */
            copy: function(out, m) {
                out[0] = m[0];
                out[1] = m[1];
                out[2] = m[2];
                out[3] = m[3];
                out[4] = m[4];
                out[5] = m[5];
                return out;
            },
            /**
             * 矩阵相乘
             * @param {Float32Array|Array.<number>} out
             * @param {Float32Array|Array.<number>} m1
             * @param {Float32Array|Array.<number>} m2
             */
            mul : function (out, m1, m2) {
                out[0] = m1[0] * m2[0] + m1[2] * m2[1];
                out[1] = m1[1] * m2[0] + m1[3] * m2[1];
                out[2] = m1[0] * m2[2] + m1[2] * m2[3];
                out[3] = m1[1] * m2[2] + m1[3] * m2[3];
                out[4] = m1[0] * m2[4] + m1[2] * m2[5] + m1[4];