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48 lines
1.4 KiB
48 lines
1.4 KiB
import { __read } from "tslib";
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/**
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* @param vec
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* @param s
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*/
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export function scale(vec, s) {
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return [vec[0] * s, vec[1] * s];
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}
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export function add(vec1, vec2) {
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return [vec1[0] + vec2[0], vec1[1] + vec2[1]];
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}
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export function sub(vec1, vec2) {
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return [vec1[0] - vec2[0], vec1[1] - vec2[1]];
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}
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export function min(vec1, vec2) {
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return [Math.min(vec1[0], vec2[0]), Math.min(vec1[1], vec2[1])];
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}
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export function max(vec1, vec2) {
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return [Math.max(vec1[0], vec2[0]), Math.max(vec1[1], vec2[1])];
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}
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export function distance(vec1, vec2) {
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return Math.sqrt(Math.pow((vec1[0] - vec2[0]), 2) + Math.pow((vec1[1] - vec2[1]), 2));
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}
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export function normalize(vec) {
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if (vec[0] === 0 && vec[1] === 0)
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return [0, 0];
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var len = Math.sqrt(Math.pow(vec[0], 2) + Math.pow(vec[1], 2));
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return [vec[0] / len, vec[1] / len];
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}
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/**
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* 将给定向量围绕指定点旋转指定角度
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* @param vec
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* @param origin 旋转中心
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* @param angle 旋转角度，弧度制
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*/
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export function rotate(vec, origin, angle) {
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var _a = __read(vec, 2), x = _a[0], y = _a[1];
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var _b = __read(origin, 2), ox = _b[0], oy = _b[1];
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var dx = x - ox;
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var dy = y - oy;
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var sin = Math.sin(angle);
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var cos = Math.cos(angle);
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return [dx * cos - dy * sin + ox, dx * sin + dy * cos + oy];
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}
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export function vertical(vec, flag) {
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return flag ? [vec[1], -vec[0]] : [-vec[1], vec[0]];
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}
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//# sourceMappingURL=matrix.js.map
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