title: Changing surrounding neighbor hexagons to "line" fill mode
body: <p>I'm trying to make a hexagon grid-based game. I've got some of the fundamentals down (implemented getting neighbors of a hexagon since the library didn't natively have it and also made it so I can recolor each individual hexagon), but I can't seem to do one thing:</p>
  
  <p>When I hover over a hexagon, the neighbors surrounding it get changed to line fill mode <a href="https://imgur.com/a/NayWC" rel="nofollow noreferrer">(picture example)</a> (assume my mouse is over the top left hexagon), but I can't seem to figure out how to change them back to 'fill' when I've stopped hovering over it.</p>
  
  <p>Here's the relevant code (handles checking if I'm hovering over a hexagon and deals with the neighbors):</p>
  
  <pre><code>function love.update()
      mx, my = love.mouse.getPosition()
      if hexGrid:containingHex(mx, my)~=nil then --am I hovering over a hexagon?
          local q,r=hexGrid:containingHex(mx, my).q,hexGrid:containingHex(mx, my).r -- get the position on the grid for the hexagon
          local neighbors=hexGrid:neighbors(q,r) -- get neighbors of hexagon I'm hovering over
          for dir, neighbor in pairs(neighbors) do -- loop through neighbor table
              if neighbor ~=nil and hexes.getHexagon(hexGrid:getHex(neighbor.q,neighbor.r))["fill"]=="fill" then -- does neighbor exist and is their fill mode "fill"?
                  local neighborHexagon=hexGrid:getHex(neighbor.q,neighbor.r) -- get the hexagon from the grid
                  local neighborData=hexes.getHexagon(neighborHexagon) -- get it's data from a seperate dictionary (stores color data and fill mode data)
                  neighborData["fill"]="line" -- set fill mode to line
              end
          end 
      end
  end
  </code></pre>