Drag object in a direction

Questions
,
1

I have an arrowhelper that I would like to be able to drag in the direction that it is pointing. I am running into issues with converting between pixels and positions. My current code is:


function initDragObjectAlongAxis() {

    console.log("init")

    window.addEventListener('mousemove', dragObjectAlongAxis, false);

    window.addEventListener('mouseup', stopDragObjectAlongAxis, false);

}

function dragObjectAlongAxis(e) {

    console.log("drag")

    object.position.z = e.clientY - objectHeight;

}

function stopDragObjectAlongAxis(e) {

    console.log("stop")

    window.removeEventListener('mousemove', dragObjectAlongAxis, false);

    window.removeEventListener('mouseup', stopDragObjectAlongAxis, false);

}

initDragObjectAlongAxis() is called from my raycaster. I have not used drag-controls because I need to be able to drag all three dimensions. I am new to three js and any help is appreciated.