Merge branch 'master' into patch-1

.travis.yml

@@ -6,8 +6,12 @@ cache:
 notifications:
   email: false
 node_js:
-  - node
+  - "10"
+before_install:
+  - npm i -g npm@^2.0.0
 before_script:
   - npm prune
+script:
+  - npm run test
 after_success:
   - npm run semantic-release

docs/user_guide.md

@@ -373,6 +373,12 @@ Executed when a tween is finished normally (i.e. not stopped).
 
 The tweened object is passed in as the first parameter.
 
+### onRepeat
+
+Executed whenever a tween has just finished one repetition and will begin another.
+
+The tweened object is passed in as the first parameter.
+
 ## Advanced tweening
 
 ### Relative values

src/Tween.js

@@ -138,6 +138,7 @@ TWEEN.Tween = function (object, group) {
 	this._onStartCallback = null;
 	this._onStartCallbackFired = false;
 	this._onUpdateCallback = null;
+	this._onRepeatCallback = null;
 	this._onCompleteCallback = null;
 	this._onStopCallback = null;
 	this._group = group || TWEEN;
@@ -318,6 +319,13 @@ TWEEN.Tween.prototype = {
 
 	},
 
+	onRepeat: function onRepeat(callback) {
+
+		this._onRepeatCallback = callback;
+		return this;
+
+	},
+
 	onComplete: function (callback) {
 
 		this._onCompleteCallback = callback;
@@ -392,7 +400,7 @@ TWEEN.Tween.prototype = {
 		}
 
 		if (this._onUpdateCallback !== null) {
-			this._onUpdateCallback(this._object);
+			this._onUpdateCallback(this._object, elapsed);
 		}
 
 		if (elapsed === 1) {
@@ -431,6 +439,10 @@ TWEEN.Tween.prototype = {
 					this._startTime = time + this._delayTime;
 				}
 
+				if (this._onRepeatCallback !== null) {
+					this._onRepeatCallback(this._object);
+				}
+
 				return true;
 
 			} else {