Grid snapping & orientation within zone

function onObjectEnterScriptingZone(zone, obj)
    -- turn on object grid snapping
    if zone.getName() == "Map Grid Zone" then
        obj.use_grid = true
        -- if obj.getName() == "Space Bunny" then
            -- obj.use_gravity = false
        -- end
    end
end

function onObjectLeaveScriptingZone(zone, obj)
    -- log(obj.getName() .. " entered zone " .. zone.getName())
    -- turn off object grid snapping
    if zone.getName() == "Map Grid Zone" then
        obj.use_grid = false
        -- if obj.getName() == "Space Bunny" then
            -- obj.use_gravity = true
        -- end
    end
    -- countGrid(self, "update")
end

 -- orient selected objects properly
function onObjectDrop(colorName, obj)
    local y = 0
    for _, o in pairs(grid_zone.getObjects()) do
        if o == obj then
            local desc = obj.getDescription()
            if string.find(desc, "Bunny") or string.find(desc, "City") or string.find(desc, "Token") then
                obj.setRotationSmooth({0,y,0})
                -- Wait.condition(
                    -- function() countGrid(self, "update") end,
                    -- function() return isResting(obj) end
                -- )
            end
            break
        end
    end
end