feat: add stop method (#536)

* feat: add stop method

* docs

readme.md

@@ -643,6 +643,12 @@ Returns the focal offset, which is how much the camera appears to be translated
 
 ---
 
+#### `stop()`
+
+stop all transitions.
+
+---
+
 #### `saveState()`
 
 Set current camera position as the default position
@@ -653,8 +659,6 @@ Set current camera position as the default position
 
 Normalize camera azimuth angle rotation between 0 and 360 degrees.
 
----
-
 #### `reset( enableTransition )`
 
 Reset all rotation and position to default.

src/CameraControls.ts

@@ -2402,6 +2402,18 @@ export class CameraControls extends EventDispatcher {
 
 	}
 
+	/**
+	 * stop all transitions.
+	 */
+	stop() {
+
+		this._focalOffset.copy( this._focalOffsetEnd );
+		this._target.copy( this._targetEnd );
+		this._spherical.copy( this._sphericalEnd );
+		this._zoom = this._zoomEnd;
+
+	}
+
 	/**
 	 * Reset all rotation and position to defaults.
 	 * @param enableTransition