66 lines
1.6 KiB
Lua
66 lines
1.6 KiB
Lua
local Randomizer = require 'tetris.randomizers.randomizer'
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local DTETRandomizer = Randomizer:extend()
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function DTETRandomizer:initialize()
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-- keep a tally of how long each piece has been droughted
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self.droughts = {
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["I"] = 0,
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["J"] = 0,
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["L"] = 0,
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["O"] = 0,
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["S"] = 0,
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["T"] = 0,
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["Z"] = 0
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}
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end
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function DTETRandomizer:updateDroughts(piece)
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-- update drought counters
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for k, v in pairs(self.droughts) do
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if k == piece then
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self.droughts[k] = 0
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else
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self.droughts[k] = v + 1
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end
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end
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end
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function DTETRandomizer:generatePiece()
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local droughts = {}
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local weights = {}
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local bag = {}
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-- copy drought table
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for k, v in pairs(self.droughts) do
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droughts[k] = v
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end
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-- assign weights to each piece
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for i = 1, 7 do
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local lowest_drought = math.huge
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local lowest_drought_piece = ""
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for k, v in pairs(droughts) do
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if v ~= nil and v < lowest_drought then
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lowest_drought = v
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lowest_drought_piece = k
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end
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end
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droughts[lowest_drought_piece] = nil
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weights[lowest_drought_piece] = i - 1
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end
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-- insert pieces into 21-bag
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for k, v in pairs(weights) do
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for i = 1, v do
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table.insert(bag, k)
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end
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end
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-- pull piece from 21-bag and update drought counters
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local generated = bag[love.love.math.random(#bag)]
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self:updateDroughts(generated)
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return generated
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end
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return DTETRandomizer |