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diff --git a/engine/src/core/com/jme3/scene/control/Control.java b/engine/src/core/com/jme3/scene/control/Control.java
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+/*
+ * Copyright (c) 2009-2010 jMonkeyEngine
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ *
+ * * Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ *
+ * * Neither the name of 'jMonkeyEngine' nor the names of its contributors
+ *   may be used to endorse or promote products derived from this software
+ *   without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package com.jme3.scene.control;
+
+import com.jme3.export.Savable;
+import com.jme3.renderer.RenderManager;
+import com.jme3.renderer.ViewPort;
+import com.jme3.scene.Spatial;
+
+/**
+ * An interface for scene-graph controls. 
+ * <p>
+ * <code>Control</code>s are used to specify certain update and render logic
+ * for a {@link Spatial}. 
+ *
+ * @author Kirill Vainer
+ */
+public interface Control extends Savable {
+
+    /**
+     * Creates a clone of the Control, the given Spatial is the cloned
+     * version of the spatial to which this control is attached to.
+     * @param spatial
+     * @return A clone of this control for the spatial
+     */
+    public Control cloneForSpatial(Spatial spatial);
+
+    /**
+     * @param spatial the spatial to be controlled. This should not be called
+     * from user code.
+     */
+    public void setSpatial(Spatial spatial);
+
+    /**
+     * @param enabled Enable or disable the control. If disabled, update()
+     * should do nothing.
+     */
+    public void setEnabled(boolean enabled);
+
+    /**
+     * @return True if enabled, false otherwise.
+     * @see Control#setEnabled(boolean)
+     */
+    public boolean isEnabled();
+
+    /**
+     * Updates the control. This should not be called from user code.
+     * @param tpf Time per frame.
+     */
+    public void update(float tpf);
+
+    /**
+     * Should be called prior to queuing the spatial by the RenderManager. This
+     * should not be called from user code.
+     *
+     * @param rm
+     * @param vp
+     */
+    public void render(RenderManager rm, ViewPort vp);
+}