技能开始

assets/script/game/skills/BezCom.ts

@@ -0,0 +1,49 @@
+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);
+}
+}
+
+