409 lines
10 KiB
Lua
409 lines
10 KiB
Lua
local Board = {}
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function Board.new()
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local debug = false
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local width = 10
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local tile_width = 10
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local margin = 4
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local padding = 1
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local reset = function()
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local t = [[
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0,0,0,0,0,0,0,0,0,0,
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0,0,0,0,0,0,0,0,0,0,
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0,0,0,0,0,0,0,0,0,0,
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0,0,0,0,0,0,0,0,0,0,
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0,0,0,0,0,0,0,0,0,0,
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0,0,0,0,0,0,0,0,0,0,
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0,0,0,0,0,0,0,0,0,0,
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0,0,0,0,0,0,0,0,0,0,
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0,0,0,0,0,0,0,0,0,0,
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0,0,0,0,0,0,0,0,0,0
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]]
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tiles = split(t)
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end
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reset()
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return {
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reset = reset,
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get_tile = function(self, idx)
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return tiles[idx]
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end,
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-- returns a COPY of the tiles array
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get_tiles_copy = function(self)
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return copy(tiles)
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end,
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-- overwrites the whole tiles array
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set_tiles = function(self, newtiles)
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assert(#newtiles == #tiles, "New tiles array must have a length of " .. #tiles)
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tiles = copy(newtiles)
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end,
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idx_xy = function(self, idx)
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return idx_xy(idx, width)
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end,
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xy_idx = function(self, x, y)
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return xy_idx(x, y, width)
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end,
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draw_coords = function(self, x, y)
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if not y then x, y = self:idx_xy(x) end
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return margin + (x-1)*tile_width + (x-1)*(padding+1),
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margin + (y-1)*tile_width + (y-1)*(padding+1)
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end,
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get_size = function(self)
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return width
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end,
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get_tile_width = function(self)
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return tile_width
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end,
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fill = function(self, idx, color, invert)
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if idx > width*width then return end
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if invert then
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color = color == YELLOW and BLUE or YELLOW
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end
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tiles[idx] = color
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end,
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get_rows = function(self)
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local ret = {}
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for i = 1, width do
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add(ret, slice(tiles, ((i - 1) * width) + 1, i * width))
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end
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return ret
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end,
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get_cols = function(self)
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local ret = {}
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local rows = self.get_rows(self)
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for i = 1, width do
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add(ret, map(rows, function(v) return v[i] end))
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end
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return ret
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end,
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is_complete = function(self)
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return count(tiles, 0) == 0
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end,
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is_valid = function(self)
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local rows = self:get_rows()
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for y,row in ipairs(rows) do
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-- check count
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if count(row, BLUE) ~= count(row, YELLOW) then
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if (debug) printh("uneven count on row "..y)
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return false
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end
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-- check identical lines
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for k,other in ipairs(rows) do
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if equal(other, row) and other ~= row then
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if (debug) printh("equal rows "..k)
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return false
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end
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end
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-- check triples
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if self:count_consecutives(row) > 2 then
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if (debug) printh("triples")
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return false
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end
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end
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local cols = self:get_cols()
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for col in all(cols) do
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-- check count
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if count(col, BLUE) ~= count(col, YELLOW) then
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if (debug) printh("uneven count")
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return false
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end
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-- check identical lines
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for other in all(cols) do
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if equal(other, col) and other ~= col then
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if (debug) printh("equal cols")
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return false
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end
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end
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-- check triples
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if self:count_consecutives(col) > 2 then
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if (debug) printh("triples")
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return false
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end
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end
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return true
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end,
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count_consecutives = function(self, line)
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local count = 0
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local last = 0
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for v in all(line) do
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if v ~= last then
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last = 0
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else
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last = v
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count += 1
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end
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end
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return count
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end,
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--
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-- Returns the index of a random zero tile
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--
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get_random_zero = function(self)
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assert(count(tiles, 0) > 0, "No zero left")
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local zeroes = filter(tiles, function(v) return v == 0 end, true)
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local z = {}
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for k,v in pairs(zeroes) do
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add(z, k)
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end
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return rnd(z)
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end,
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--
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-- Returns the index of a random non-zero tile
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--
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get_random_non_zero = function(self)
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assert(count(tiles, 0) < #tiles, "All zeroes")
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local numbers = filter(tiles, function(v) return v ~= 0 end, true)
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local z = {}
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for k,v in pairs(numbers) do
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add(z, k)
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end
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return rnd(z)
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end,
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tostring = function(self)
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local str = ''
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for v in all(tiles) do
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str ..= ", " .. v
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end
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return str
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end,
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-- Solves 1 step of the board
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-- Returns "valid" if it solved it without guessing
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-- Returns "invalid" if the board cannot be solved
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solve_step = function(self, random)
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local zeroes = count(tiles, 0)
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self:surround_doubles()
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self:split_triples()
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self:fill_lines()
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self:no_identical_lines()
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local changed = zeroes ~= count(tiles, 0)
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if not changed and random and not self:is_complete() then
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-- Set a random color
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local z = self:get_random_zero()
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self:fill(z, rnd({BLUE, YELLOW}))
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if (debug) printh("!!!!!!!!!!!!!!!!! RANDOM FILL AT " .. z)
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return "invalid"
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end
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return (changed or self:is_complete()) and "valid" or "invalid"
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end,
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surround_doubles = function(self)
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for idx,v in ipairs(tiles) do
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local x,y = self:idx_xy(idx)
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if v == 0 then
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local neighbors = {}
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-- 2 tiles on the left
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if x >= 3 then
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add(neighbors, {idx, idx-1, idx-2})
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end
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-- 2 tiles on the right
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if x <= width-2 then
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add(neighbors, {idx, idx+1, idx+2})
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end
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-- 2 tiles on top
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if y >= 3 then
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add(neighbors, {idx, idx-width, idx - width*2})
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end
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-- 2 tiles under
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if y <= width-2 then
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add(neighbors, {idx, idx+width, idx + width*2})
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end
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-- only keep pairs that are identical (and not 0)
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neighbors = filter(neighbors, function (o) return tiles[o[2]] == tiles[o[3]] and tiles[o[2]] ~= 0 end)
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-- do the surrounding
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for item in all(neighbors) do
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if item[1] then
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if (debug) printh("Surrounding at " .. item[1])
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self:fill(item[1], tiles[item[2]], true)
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end
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end
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end
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end
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end,
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split_triples = function(self)
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for idx, col in ipairs(tiles) do
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local x,y = self:idx_xy(idx)
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if col == 0 then
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if x > 1 and x < width then
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-- check horizontal
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local prev = tiles[idx-1]
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local next = tiles[idx+1]
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if prev ~= 0 and prev == next then
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if (debug) printh("Splitting at " .. idx)
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self:fill(idx, prev, true)
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end
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end
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if y>1 and y < width then
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-- check vertical
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local prev = tiles[idx-width]
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local next = tiles[idx+width]
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if prev ~= 0 and prev == next then
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if (debug) printh("Splitting at " .. idx)
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self:fill(idx, prev, true)
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end
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end
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end
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end
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end,
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fill_lines = function(self)
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local rows = self:get_rows()
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local cols = self:get_cols()
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-- rows
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for y,row in ipairs(rows) do
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local a = count(row, BLUE)
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local b = count(row, YELLOW)
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if a ~= b then
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if a == width/2 then self:fill_row(y, YELLOW) end
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if b == width/2 then self:fill_row(y, BLUE) end
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end
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end
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-- columns
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for x,col in ipairs(cols) do
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local a = count(col, BLUE)
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local b = count(col, YELLOW)
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if a ~= b then
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if a == width/2 then self:fill_col(x, YELLOW) end
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if b == width/2 then self:fill_col(x, BLUE) end
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end
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end
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end,
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fill_row = function(self, y, color)
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if (debug) printh("Filling line " .. y .. " in " .. (color == BLUE and "blue" or "yellow"))
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local idx = self:xy_idx(1, y)
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for i = idx, (idx+width-1) do
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if self:get_tile(i) == 0 then
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self:fill(i, color)
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end
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end
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end,
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fill_col = function(self, x, color)
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if (debug) printh("Filling column " .. x .. " in " .. (color == BLUE and "blue" or "yellow"))
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local idx = self:xy_idx(x, 1)
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for i = idx, #tiles, width do
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if self:get_tile(i) == 0 then
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self:fill(i, color)
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end
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end
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end,
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no_identical_lines = function(self)
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-- columns
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local cols = self:get_cols()
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for x,col in ipairs(cols) do
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if count(col, 0) == 2 and count(col, BLUE) == count(col, YELLOW) then
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local y1, y2 = unpack(find(col, 0))
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local ab = copy(col) ab[y1] = BLUE ab[y2] = YELLOW
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local ba = copy(col) ba[y1] = YELLOW ba[y2] = BLUE
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-- Check if a dupe exists
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for x2,col in ipairs(cols) do
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if equal(col, ab) then
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if debug then
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printh("No-dupe at col " .. x .. " from col " .. x2)
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printh(" " .. self:xy_idx(x,y1) .. " in yellow")
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printh(" " .. self:xy_idx(x,y2) .. " in blue")
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end
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self:fill(self:xy_idx(x,y1), YELLOW)
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self:fill(self:xy_idx(x,y2), BLUE)
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goto continue
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elseif equal(col, ba) then
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if debug then
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printh("No-dupe at col " .. x .. " from col " .. x2)
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printh(" " .. self:xy_idx(x,y1) .. " in blue")
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printh(" " .. self:xy_idx(x,y2) .. " in yellow")
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end
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self:fill(self:xy_idx(x,y1), BLUE)
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self:fill(self:xy_idx(x,y2), YELLOW)
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goto continue
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end
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end
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end
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::continue::
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end
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-- rows
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local rows = self:get_rows()
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for y,row in ipairs(rows) do
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if count(row, 0) == 2 and count(row, BLUE) == count(row, YELLOW) then
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local x1, x2 = unpack(find(row, 0))
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local ab = copy(row) ab[x1] = BLUE ab[x2] = YELLOW
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local ba = copy(row) ba[x1] = YELLOW ba[x2] = BLUE
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-- Check if a dupe exists
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for y2,row in ipairs(rows) do
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if equal(row, ab) then
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if debug then
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printh("No-dupe at row " .. y .. " from row " .. y2)
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printh(" " .. self:xy_idx(x1,y) .. " in yellow")
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printh(" " .. self:xy_idx(x2,y) .. " in blue")
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end
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self:fill(self:xy_idx(x1,y), YELLOW)
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self:fill(self:xy_idx(x2,y), BLUE)
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goto continue
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elseif equal(row, ba) then
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if debug then
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printh("No-dupe at row " .. y .. " from row " .. y2)
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printh(" " .. self:xy_idx(x1,y) .. " in blue")
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printh(" " .. self:xy_idx(x2,y) .. " in yellow")
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end
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self:fill(self:xy_idx(x1,y), BLUE)
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self:fill(self:xy_idx(x2,y), YELLOW)
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goto continue
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end
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end
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end
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::continue::
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end
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end,
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draw_bg = function(self)
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local w = width
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fillp(▒)
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for k,v in ipairs(tiles) do
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local x,y = self:draw_coords(k)
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rectfill2(x, y, w, w, 1)
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end
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end,
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draw = function(self)
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self:draw_bg()
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local w = width
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for k,v in ipairs(tiles) do
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if v > 0 then
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local x,y = self:draw_coords(k)
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local color = v == BLUE and 12 or 8
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if color == 1 then fillp(▒) else fillp(█) end
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rectfill2(x, y, w, w, color)
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end
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end
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end
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}
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end |