loop实现

src/animation/Wave.ts

@@ -84,17 +84,17 @@ export default class Wave extends ScillaComponent {
 
 			const {duration, waveParams, _waveMethod, transform, transform: {position, scale}, _oldProps} = this;
 
+			let pass = (t - this._startTime) % duration;
+			let r = pass / duration * PI2;
+
 			let loopCounting = Math.floor((t - this._startTime) / duration);
 			if(loopCounting != this._loopCounting){
 				this._loopCounting = loopCounting;
 				if(this.onLoopEnd()){
-					return;
+					r = PI2;
 				}
 			}
 
-			let pass = (t - this._startTime) % duration;
-			let r = pass / duration * PI2;
-
 			let params = waveParams || [];
 			let props = _waveMethod(...params, r);