# Rotation

hi,

I need a model to be rotated according to the person press the “Q” and "E "… If Q is pressures, the model rotates to the left. If E is pressed, the model rotates to the right …

how I could do this using the matrix or quaternion?

i read it: http://www.jmonkeyengine.com/wiki/doku.php/matrix , but not understand

Pardon me if I sound ignorant (I'm still learning JME), but is there a reason you want to use a matrix to rotate a model?

``` private void setKeyBindings(String api) {         KeyBindingManager keyboard = KeyBindingManager.getKeyBindingManager();         keyboard.set("turnRight", KeyInput.KEY_E);         keyboard.set("turnLeft", KeyInput.KEY_Q);     } private void setActions(Spatial node) {         KeyNodeRotateRightAction rotateRight = new KeyNodeRotateRightAction(node, 5f);         rotateRight.setLockAxis(node.getLocalRotation().getRotationColumn(1));         addAction(rotateRight, "turnRight", true);           KeyNodeRotateLeftAction rotateLeft = new KeyNodeRotateLeftAction(node, 5f);         rotateLeft.setLockAxis(node.getLocalRotation().getRotationColumn(1));         addAction(rotateLeft, "turnLeft", true); } ```

Couldn't you just rotate the models node like we all learned in Flag Rush? Or is there some advantage to using a matrix that I'm missing? :?

I'm not so sure he knows flagrush For me the fastest way to rotate a node for a certain amount of degree:

```       Quaternion rotLeft = new Quaternion();       rotLeft.fromAngleAxis(3*FastMath.DEG_TO_RAD, Vector3f.UNIT_Y);       Node n = new Node();       // rotate n about 3 deg to left (might right don't know the direction of positiv or negative degrees       n.getLocalRotation().multLocal(rotLeft);       // rotate again       n.getLocalRotation().multLocal(rotLeft); ```

ttrocha,

Worked very well.

thank you very much!