}
else if (evt.type == EventType.ScrollWheel && evt.delta.magnitude != 0) {
var delta = evt.delta;
delta.x = 0f;
delta.y /= 3f;
var pos = _getPointerPosition(evt.mousePosition);
_wrapper.OnMouseScroll(delta, pos);
var deltaY = radius * Mathf.Sin(angle);
Matrix4 transform = MatrixUtils.createCylindricalProjectionTransform(
radius: size.height * _diameterRatio / 2.0F,
radius: size.height * _diameterRatio / 2.0f,
angle: angle,
perspective: _perspective
);