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Co-Authored-By: 狸花猫/Claude-Qwen3.6-Plus 🐾
106 lines
2.8 KiB
JavaScript
106 lines
2.8 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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/**
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* @description 扩展方法，提供 gl-matrix 为提供的方法
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* */
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var gl_matrix_1 = require("gl-matrix");
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function leftTranslate(out, a, v) {
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var transMat = [0, 0, 0, 0, 0, 0, 0, 0, 0];
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gl_matrix_1.mat3.fromTranslation(transMat, v);
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return gl_matrix_1.mat3.multiply(out, transMat, a);
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}
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exports.leftTranslate = leftTranslate;
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function leftRotate(out, a, rad) {
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var rotateMat = [0, 0, 0, 0, 0, 0, 0, 0, 0];
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gl_matrix_1.mat3.fromRotation(rotateMat, rad);
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return gl_matrix_1.mat3.multiply(out, rotateMat, a);
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}
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exports.leftRotate = leftRotate;
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function leftScale(out, a, v) {
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var scaleMat = [0, 0, 0, 0, 0, 0, 0, 0, 0];
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gl_matrix_1.mat3.fromScaling(scaleMat, v);
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return gl_matrix_1.mat3.multiply(out, scaleMat, a);
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}
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exports.leftScale = leftScale;
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function leftMultiply(out, a, a1) {
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return gl_matrix_1.mat3.multiply(out, a1, a);
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}
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/**
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* 根据 actions 来做 transform
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* @param m
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* @param actions
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*/
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function transform(m, actions) {
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var matrix = m ? [].concat(m) : [1, 0, 0, 0, 1, 0, 0, 0, 1];
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for (var i = 0, len = actions.length; i < len; i++) {
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var action = actions[i];
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switch (action[0]) {
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case 't':
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leftTranslate(matrix, matrix, [action[1], action[2]]);
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break;
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case 's':
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leftScale(matrix, matrix, [action[1], action[2]]);
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break;
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case 'r':
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leftRotate(matrix, matrix, action[1]);
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break;
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case 'm':
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leftMultiply(matrix, matrix, action[1]);
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break;
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default:
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break;
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}
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}
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return matrix;
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}
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exports.transform = transform;
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/**
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* 向量 v1 到 向量 v2 夹角的方向
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* @param {Array} v1 向量
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* @param {Array} v2 向量
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* @return {Boolean} >= 0 顺时针 < 0 逆时针
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*/
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function direction(v1, v2) {
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return v1[0] * v2[1] - v2[0] * v1[1];
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}
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exports.direction = direction;
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/**
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* 二维向量 v1 到 v2 的夹角
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* @param v1
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* @param v2
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* @param direct
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*/
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function angleTo(v1, v2, direct) {
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var ang = gl_matrix_1.vec2.angle(v1, v2);
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var angleLargeThanPI = direction(v1, v2) >= 0;
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if (direct) {
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if (angleLargeThanPI) {
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return Math.PI * 2 - ang;
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}
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return ang;
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}
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if (angleLargeThanPI) {
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return ang;
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}
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return Math.PI * 2 - ang;
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}
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exports.angleTo = angleTo;
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/**
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* 计算二维向量的垂直向量
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* @param out
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* @param v
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* @param flag
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*/
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function vertical(out, v, flag) {
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if (flag) {
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out[0] = v[1];
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out[1] = -1 * v[0];
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}
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else {
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out[0] = -1 * v[1];
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out[1] = v[0];
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}
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return out;
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}
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exports.vertical = vertical;
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//# sourceMappingURL=ext.js.map
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