44 lines
1.5 KiB
Plaintext
44 lines
1.5 KiB
Plaintext
"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.mul = mul;
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exports.multiply = multiply;
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/**
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* @file matrix变换操作
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* @author mengke01(kekee000@gmail.com)
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*/
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/**
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* 仿射矩阵相乘
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*
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* @param {Array=} matrix1 矩阵1
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* @param {Array=} matrix2 矩阵2
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* @return {Array} 新矩阵
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*/
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function mul() {
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var matrix1 = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : [1, 0, 0, 1];
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var matrix2 = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : [1, 0, 0, 1];
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// 旋转变换 4 个参数
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if (matrix1.length === 4) {
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return [matrix1[0] * matrix2[0] + matrix1[2] * matrix2[1], matrix1[1] * matrix2[0] + matrix1[3] * matrix2[1], matrix1[0] * matrix2[2] + matrix1[2] * matrix2[3], matrix1[1] * matrix2[2] + matrix1[3] * matrix2[3]];
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}
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// 旋转位移变换, 6 个参数
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return [matrix1[0] * matrix2[0] + matrix1[2] * matrix2[1], matrix1[1] * matrix2[0] + matrix1[3] * matrix2[1], matrix1[0] * matrix2[2] + matrix1[2] * matrix2[3], matrix1[1] * matrix2[2] + matrix1[3] * matrix2[3], matrix1[0] * matrix2[4] + matrix1[2] * matrix2[5] + matrix1[4], matrix1[1] * matrix2[4] + matrix1[3] * matrix2[5] + matrix1[5]];
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}
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/**
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* 多个仿射矩阵相乘
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*
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* @param {...Array} matrixs matrix array
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* @return {Array} 新矩阵
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*/
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function multiply() {
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var result = arguments.length <= 0 ? undefined : arguments[0];
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for (var i = 1, matrix; matrix = i < 0 || arguments.length <= i ? undefined : arguments[i]; i++) {
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result = mul(result, matrix);
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}
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return result;
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} |