cambridge/tetris/randomizers/history_4rolls.lua

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local Randomizer = require 'tetris.randomizers.randomizer'
local History4RollsRandomizer = Randomizer:extend()
function History4RollsRandomizer:initialize()
self.history = {"Z", "Z", "Z", "Z"}
self.first = true
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end
function History4RollsRandomizer:generatePiece()
if self.first then
self.first = false
return self:updateHistory(({"L", "J", "I", "T"})[love.math.random(4)])
else
local shapes = {"I", "J", "L", "O", "S", "T", "Z"}
for i = 1, 4 do
local x = love.math.random(7)
if not inHistory(shapes[x], self.history) or i == 4 then
return self:updateHistory(shapes[x])
end
end
end
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end
function History4RollsRandomizer:updateHistory(shape)
table.remove(self.history, 1)
table.insert(self.history, shape)
return shape
end
function inHistory(piece, history)
for idx, entry in pairs(history) do
if entry == piece then
return true
end
end
return false
end
return History4RollsRandomizer