-- Populate global.max_mining_drill_radius with [Category:double]
function recompute_max_mining_drill_radius()
  local max_radius = {}

  local prototypes = game.get_filtered_entity_prototypes({{filter = "type", type = "mining-drill"}})
  for _, prototype in pairs(prototypes) do
    local categories = prototype.resource_categories or {}
    for category, _ in pairs(categories) do
      max_radius[category] = math.max(max_radius[category] or 0, prototype.mining_drill_radius or 0)
    end
  end

  global.max_mining_drill_radius = max_radius
end