in src/lib/OrbitControls.js [674:700]
function onMouseMove(event) {
if (scope.enabled === false) return;
event.preventDefault();
if (state === STATE.ROTATE) {
if (scope.enableRotate === false) return;
handleMouseMoveRotate(event);
} else if (state === STATE.DOLLY) {
if (scope.enableZoom === false) return;
handleMouseMoveDolly(event);
} else if (state === STATE.PAN) {
if (scope.enablePan === false) return;
handleMouseMovePan(event);
}
}