86 lines
2.5 KiB
JavaScript
86 lines
2.5 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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var three_1 = require("three");
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/**
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* 轨道控制的数学类,观察向量和角度的互相转换
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* 当x当抬头或者低头到90度时,触发万向锁.
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*
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* @class Orbit
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*/
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var Orbit = /** @class */ (function () {
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function Orbit() {
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//抬头低头 正数抬头 负数低头
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this.m_RoX = 0;
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//身体旋转 0为正右边 逆时针旋转
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this.RoZ = 0;
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}
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Object.defineProperty(Orbit.prototype, "RoX", {
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get: function () {
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return this.m_RoX;
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},
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set: function (v) {
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this.m_RoX = three_1.MathUtils.clamp(v, Math.PI * -0.5, Math.PI * 0.5);
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},
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enumerable: true,
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configurable: true
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});
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/**
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* 使用旋转角度 计算观察向量
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*
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* @param {Vector3} [dir] 引用传入,如果传入,那么就不构造新的向量
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* @returns {Vector3} 返回观察向量
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* @memberof Orbit
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*/
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Orbit.prototype.UpdateDirection = function (dir) {
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var rtDir = dir ? dir : new three_1.Vector3();
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rtDir.z = Math.sin(this.m_RoX);
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//归一化专用.
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var d = Math.abs(Math.cos(this.m_RoX));
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rtDir.x = Math.cos(this.RoZ) * d;
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rtDir.y = Math.sin(this.RoZ) * d;
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return rtDir;
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};
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/**
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* 使用观察向量,计算旋转角度
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*
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* @param {Vector3} dir
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* @memberof Orbit
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*/
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Orbit.prototype.UpdateRoValue = function (dir) {
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dir.normalize();
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this.m_RoX = Math.asin(dir.z);
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if (dir.x < 1e-4 && dir.y < 1e-4)
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this.RoZ = Math.PI * 0.5;
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else
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this.RoZ = Math.atan2(dir.y, dir.x);
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};
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/**
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*
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* 根据观察向量 求头部的向量.
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*
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* @static
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* @param {Vector3} dir
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* @param {Vector3} [up]
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* @returns {Vector3}
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* @memberof Orbit
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*/
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Orbit.ComputUpDirection = function (dir, up) {
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var upRes = up ? up : new three_1.Vector3();
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if (dir.equals(new three_1.Vector3(0, 0, -1))) {
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upRes.set(0, 1, 0);
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}
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else if (dir.equals(new three_1.Vector3(0, 0, 1))) {
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upRes.set(0, -1, 0);
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}
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else {
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var xv = new three_1.Vector3();
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xv.crossVectors(new three_1.Vector3(0, 0, 1), dir);
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upRes.crossVectors(dir, xv);
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upRes.normalize();
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}
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return upRes;
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};
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return Orbit;
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}());
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exports.Orbit = Orbit;
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//# sourceMappingURL=Orbit.js.map
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