fix: 1

public/lib/potree/potree.js

@@ -59596,17 +59596,17 @@
 	      var startQuaternion = this.quaternions[this.currentIndex];
 	      quaternion = new Quaternion().copy(startQuaternion);
 	      lerp.quaternion(quaternion, endQuaternion)(progress);
-	      var endPos = this.posCurve.points[this.currentIndex + 1];
-	      var startPos = this.posCurve.points[this.currentIndex];
-	      position = new Vector3().copy(startPos);
-	      lerp.vector(position, endPos)(progress);
+
+	      /* let endPos = this.posCurve.points[this.currentIndex+1]
+	      let startPos = this.posCurve.points[this.currentIndex]       
+	      position = (new THREE.Vector3()).copy(startPos) 
+	      lerp.vector(position, endPos)(progress)    */
 	    } else {
 	      this.currentIndex = this.posCurve.points.length - 1;
 	      quaternion = this.quaternions[this.currentIndex];
 	      position = this.posCurve.points[this.currentIndex];
 	    }
-
-	    //position = this.posCurve.getPointAt(percent); // 需要this.posCurve.points.length>1 否则报错
+	    position = this.posCurve.getPointAt(percent); // 需要this.posCurve.points.length>1 否则报错
 
 	    //console.log(this.currentIndex, originPercent)
 	    //缓动：