Randomization

    def self.randomize_table( table, width, height )
      newtable = table.deep_clone
      tier1classes = [ 1,  6, 11]
      tier2classes = [ 2,  7, 10, 12, 14]
      tier3classes = [ 3,  4,  5,  8,  9, 13, 15]
      tier1_dist1  = 2 # // Tier 1 distance from another tier 1
      tier2_dist1  = 3 # // Tier 2 distance from another tier 1
      tier2_dist2  = 4 # // Tier 2 distance from another tier 2
      tier3_dist1  = 6 # // Tier 3 distance from another tier 1
      tier3_dist2  = 5 # // Tier 3 distance from another tier 2
      tier3_dist3  = 6 # // Tier 3 distance from another tier 3
      tier1_positions = []
      tier2_positions = []
      tier3_positions = []

      rngblock = proc { |x, y, dist|
        rng = create_block_range( x, y, dist ) - create_block_range( x, y, dist-1 )
        rng = rng.inject([]) { |r, a| r << a if a[0] >= 0 && a[1] >= 0 ; r }
        rng }

      mrngblock = proc { |rs, rng, dist|
        result = rng.deep_clone
        rs.each { |rss|
          result -= create_block_range( rss[0], rss[1], dist )
          result -= [rss[0], rss[1]] }
        result
      }

      rngfinal = proc { |*rules|
        rrange = []
        rules.each { |rl|
          rrange += rl[0].inject([]) { |r, a|
            r | rngblock.call( a[0], a[1], rl[1] ) }
        }
        rules.each { |rl| rrange = mrngblock.call( rl[0], rrange, rl[1] ) }
        rrange
      }

      # // Tier 1
      x, y = rand( width ), rand( height )
      tier1_positions << [x, y]
      i = tier1classes.shift
      newtable[xy_from_index( x, y, width )][1] = [ClassBlock, i]
      while !tier1classes.empty?()
        range = rngfinal( [tier1_positions, tier1_dist1] )

        r = range.randomize()[0]
        tier1_positions << [r[0], r[1]]
        newtable[xy_from_index( r[0], r[1], width )][1] = [ClassBlock, tier1classes.shift]
      end
      # // Tier 2
      while !tier2classes.empty?()
        range = rngfinal( [tier1_positions, tier2_dist1],
                          [tier2_positions, tier2_dist2]
                        )

        r = range.randomize()[0]
        tier2_positions << [r[0], r[1]]
        newtable[xy_from_index( r[0], r[1], width )][1] = [ClassBlock, tier2classes.shift]
      end
      # // Tier 3
      while !tier3classes.empty?()
        range = rngfinal( [tier1_positions, tier3_dist1],
                          [tier2_positions, tier3_dist2],
                          [tier3_positions, tier3_dist3]
                        )

        r = range.randomize()[0]
        tier3_positions << [r[0], r[1]]
        newtable[xy_from_index( r[0], r[1], width )][1] = [ClassBlock, tier3classes.shift]
      end
    end