38 lines
923 B
Lua
38 lines
923 B
Lua
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local Randomizer = require 'tetris.randomizers.randomizer'
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local HistoryRandomizer = Randomizer:extend()
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function HistoryRandomizer:new(history_length, rolls, allowed_pieces)
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self.history = {}
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for i = 1, history_length do
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table.insert(self.history, '')
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end
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self.rolls = rolls
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self.allowed_pieces = allowed_pieces
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end
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function HistoryRandomizer:generatePiece()
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for i = 1, self.rolls do
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local x = math.random(table.getn(self.allowed_pieces))
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if not inHistory(self.allowed_pieces[x], self.history) or i == self.rolls then
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return self:updateHistory(self.allowed_pieces[x])
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end
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end
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end
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function HistoryRandomizer:updateHistory(shape)
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table.remove(self.history, 1)
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table.insert(self.history, shape)
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return shape
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end
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function inHistory(piece, history)
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for idx, entry in pairs(history) do
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if entry == piece then
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return true
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end
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end
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return false
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end
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return HistoryRandomizer
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