import { _decorator, Component, Node, tween, v3, Vec3 } from 'cc';
import { SkillCom } from './SkillCom';
const { ccclass, property } = _decorator;

@ccclass('BezCom')
export class BezCom extends Component {
    start() {
        let base =this.node.getComponent(SkillCom)
        if(this.node.parent.scale.x  < 0){
            base.t_pos.x=base.t_pos.x*-1
        }
        let s_pos = v3(this.node.position.x,this.node.position.y)
        let c_pos = v3((base.t_pos.x+this.node.position.x)/2,this.node.position.y+100)
        let e_pos = v3(this.node.position.x+base.t_pos.x,this.node.position.y+base.t_pos.y)
        let time =Math.abs(base.t_pos.x/base.speed)
        BezCom.bezierTo(this.node,time,s_pos,c_pos,e_pos,{
            onComplete: (target?: object) => {   
                base.is_destroy=true
            },   
        }).start();
    }

    update(deltaTime: number) {
        
    }

    public static bezierTo(target: any, duration: number, c1: Vec3, c2: Vec3, to: Vec3, opts: any) {
        opts = opts || Object.create(null);
        /*
        * @desc 二阶贝塞尔
        * @param {number} t 当前百分比
        * @param {} p1 起点坐标
        * @param {} cp 控制点
        * @param {} p2 终点坐标
        * @returns {any}
        */
        let twoBezier = (t:number, p1: Vec3, cp: Vec3, p2: Vec3) => {
            let x = (1 - t) * (1 - t) * p1.x + 2 * t * (1 - t) * cp.x + t * t * p2.x;
            let y = (1 - t) * (1 - t) * p1.y + 2 * t * (1 - t) * cp.y + t * t * p2.y;
            return v3(x, y, 0);
        };
        opts.onUpdate = (arg: Vec3, ratio: number) => {
            target.position = twoBezier(ratio, c1, c2, to);
        };
        return tween(target).to(duration, {}, opts);
}
}