How can i add zoom on mousewheel on pointerlockcontrols?

i want to add the ability to zoom on mouse wheel when using PointerlockControls but how to do it ?

You should start by adding an event listener to the wheel event like this:

document.addEventListener( 'wheel', onMouseWheel, false );

Assuming you are using a perspective camera, you can then try to add a comparable logic like in OrbitControls by dollyIn/dollyOut the camera along the look direction.

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