void tryAddNode()
{
RaycastHit hit;
Ray ray = m_camera.ScreenPointToRay(Input.mousePosition);
if (Physics.Raycast(ray, out hit, 10000, 1 << LayerMask.NameToLayer("Terrain")))
{
Vector3 point = hit.point;
point += hit.normal * 0.25f;
//point.y = 0.5f;
m_lineEditor.addNodeForCurrentLineAtPosition(GridUtil.posToGridPos(point));
}
}