58 lines
1.5 KiB
TypeScript
58 lines
1.5 KiB
TypeScript
import { Vec2, Vec3 } from 'cc';
|
|
|
|
export default class Utilities {
|
|
/**
|
|
*
|
|
* @param time (s)
|
|
* @returns
|
|
*/
|
|
public static delay(time: number): Promise<any> {
|
|
return new Promise((resolve) => setTimeout(resolve, time * 1000));
|
|
}
|
|
|
|
/**
|
|
*@param predicate
|
|
* @param time (s)
|
|
* @returns
|
|
*/
|
|
public static async waitUntil(predicate: () => boolean, timeCheck = 0.01) {
|
|
while (!predicate()) {
|
|
await this.delay(timeCheck);
|
|
}
|
|
}
|
|
|
|
public static getJson(json: string): any {
|
|
try {
|
|
return JSON.parse(json);
|
|
} catch (error) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
public static Vec2ToVec3(Vec2: Vec2): Vec3 {
|
|
return new Vec3(Vec2.x, Vec2.y);
|
|
}
|
|
|
|
public static Vec3ToVec2(Vec3: Vec3): Vec2 {
|
|
return new Vec2(Vec3.x, Vec3.y);
|
|
}
|
|
|
|
public static weightedRandom<T>(items: T[], weights: number[]): T {
|
|
const weightsClone = [...weights];
|
|
const totalWeight = weightsClone.reduce((a, b) => a + b, 0);
|
|
let random = Math.random() * totalWeight;
|
|
const item = items.find((_, i) => (random -= weightsClone[i]) <= 0);
|
|
return item;
|
|
// for (i = 1; i < weightsClone.length; i++) {
|
|
// weightsClone[i] += weights[i - 1];
|
|
// }
|
|
|
|
// let random = Math.random() * weightsClone[weightsClone.length - 1];
|
|
|
|
// for (i = 0; i < weightsClone.length; i++) {
|
|
// if (weightsClone[i] > random) break;
|
|
// }
|
|
// return [items[i], i];
|
|
}
|
|
}
|