cambridge/tetris/components/grid.lua

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local Object = require 'libs.classic'
local Grid = Object:extend()
local empty = { skin = "", colour = "" }
function Grid:new()
self.grid = {}
self.grid_age = {}
for y = 1, 24 do
self.grid[y] = {}
self.grid_age[y] = {}
for x = 1, 10 do
self.grid[y][x] = empty
self.grid_age[y][x] = 0
end
end
end
function Grid:clear()
for y = 1, 24 do
for x = 1, 10 do
self.grid[y][x] = empty
self.grid_age[y][x] = 0
end
end
end
function Grid:isOccupied(x, y)
return self.grid[y+1][x+1] ~= empty
end
function Grid:isRowFull(row)
for index, square in pairs(self.grid[row]) do
if square == empty then return false end
end
return true
end
function Grid:canPlacePiece(piece)
if piece.big then
return self:canPlaceBigPiece(piece)
end
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local offsets = piece:getBlockOffsets()
for index, offset in pairs(offsets) do
local x = piece.position.x + offset.x
local y = piece.position.y + offset.y
if x >= 10 or x < 0 or y >= 24 or y < 0 or self.grid[y+1][x+1] ~= empty then
return false
end
end
return true
end
function Grid:canPlaceBigPiece(piece)
local offsets = piece:getBlockOffsets()
for index, offset in pairs(offsets) do
local x = piece.position.x + offset.x
local y = piece.position.y + offset.y
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if y < 0 then return true
elseif x >= 5 or x < 0 or y >= 12 or
self.grid[y * 2 + 1][x * 2 + 1] ~= empty or
self.grid[y * 2 + 1][x * 2 + 2] ~= empty or
self.grid[y * 2 + 2][x * 2 + 1] ~= empty or
self.grid[y * 2 + 2][x * 2 + 2] ~= empty
then
return false
end
end
return true
end
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function Grid:canPlacePieceInVisibleGrid(piece)
if piece.big then
return self:canPlaceBigPiece(piece)
-- forget canPlaceBigPieceInVisibleGrid for now
end
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local offsets = piece:getBlockOffsets()
for index, offset in pairs(offsets) do
local x = piece.position.x + offset.x
local y = piece.position.y + offset.y
if x >= 10 or x < 0 or y >= 24 or y < 4 or self.grid[y+1][x+1] ~= empty then
return false
end
end
return true
end
function Grid:getClearedRowCount()
local count = 0
for row = 1, 24 do
if self:isRowFull(row) then
count = count + 1
end
end
return count
end
function Grid:markClearedRows()
for row = 1, 24 do
if self:isRowFull(row) then
for x = 1, 10 do
self.grid[row][x] = {
skin = self.grid[row][x].skin,
colour = "X"
}
end
end
end
return true
end
function Grid:clearClearedRows()
for row = 1, 24 do
if self:isRowFull(row) then
for above_row = row, 2, -1 do
self.grid[above_row] = self.grid[above_row - 1]
self.grid_age[above_row] = self.grid_age[above_row - 1]
end
self.grid[1] = {empty, empty, empty, empty, empty, empty, empty, empty, empty, empty}
self.grid_age[1] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0}
end
end
return true
end
function Grid:copyBottomRow()
for row = 1, 23 do
self.grid[row] = self.grid[row+1]
self.grid_age[row] = self.grid_age[row+1]
end
self.grid[24] = {empty, empty, empty, empty, empty, empty, empty, empty, empty, empty}
self.grid_age[24] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0}
for col = 1, 10 do
self.grid[24][col] = (self.grid[23][col] == empty) and empty or {
skin = self.grid[23][col].skin,
colour = "G"
}
end
return true
end
function Grid:applyPiece(piece)
if piece.big then
self:applyBigPiece(piece)
return
end
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offsets = piece:getBlockOffsets()
for index, offset in pairs(offsets) do
x = piece.position.x + offset.x
y = piece.position.y + offset.y
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if y + 1 > 0 then
self.grid[y+1][x+1] = {
skin = piece.skin,
colour = piece.shape
}
end
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end
end
function Grid:applyBigPiece(piece)
offsets = piece:getBlockOffsets()
for index, offset in pairs(offsets) do
x = piece.position.x + offset.x
y = piece.position.y + offset.y
for a = 1, 2 do
for b = 1, 2 do
self.grid[y*2+a][x*2+b] = {
skin = piece.skin,
colour = piece.shape
}
end
end
end
end
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function Grid:update()
for y = 1, 24 do
for x = 1, 10 do
if self.grid[y][x] ~= empty then
self.grid_age[y][x] = self.grid_age[y][x] + 1
end
end
end
end
function Grid:draw()
for y = 1, 24 do
for x = 1, 10 do
if self.grid[y][x] ~= empty then
if self.grid_age[y][x] < 1 then
love.graphics.setColor(1, 1, 1, 1)
love.graphics.draw(blocks[self.grid[y][x].skin]["F"], 48+x*16, y*16)
else
love.graphics.setColor(0.5, 0.5, 0.5, 1)
love.graphics.draw(blocks[self.grid[y][x].skin][self.grid[y][x].colour], 48+x*16, y*16)
end
if self.grid[y][x].skin ~= "bone" then
love.graphics.setColor(0.8, 0.8, 0.8, 1)
love.graphics.setLineWidth(1)
if y > 1 and self.grid[y-1][x] == empty then
love.graphics.line(48.0+x*16, -0.5+y*16, 64.0+x*16, -0.5+y*16)
end
if y < 24 and self.grid[y+1][x] == empty then
love.graphics.line(48.0+x*16, 16.5+y*16, 64.0+x*16, 16.5+y*16)
end
if x > 1 and self.grid[y][x-1] == empty then
love.graphics.line(47.5+x*16, -0.0+y*16, 47.5+x*16, 16.0+y*16)
end
if x < 10 and self.grid[y][x+1] == empty then
love.graphics.line(64.5+x*16, -0.0+y*16, 64.5+x*16, 16.0+y*16)
end
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end
end
end
end
end
function Grid:drawInvisible(opacity_function, garbage_opacity_function)
for y = 1, 24 do
for x = 1, 10 do
if self.grid[y][x] ~= empty then
if self.grid[y][x].colour == "X" then
opacity = 1
elseif garbage_opacity_function and self.grid[y][x].colour == "G" then
opacity = garbage_opacity_function(self.grid_age[y][x])
else
opacity = opacity_function(self.grid_age[y][x])
end
love.graphics.setColor(0.5, 0.5, 0.5, opacity)
love.graphics.draw(blocks[self.grid[y][x].skin][self.grid[y][x].colour], 48+x*16, y*16)
if opacity > 0 and self.grid[y][x].colour ~= "X" then
love.graphics.setColor(0.64, 0.64, 0.64)
love.graphics.setLineWidth(1)
if y > 1 and self.grid[y-1][x] == empty then
love.graphics.line(48.0+x*16, -0.5+y*16, 64.0+x*16, -0.5+y*16)
end
if y < 24 and self.grid[y+1][x] == empty then
love.graphics.line(48.0+x*16, 16.5+y*16, 64.0+x*16, 16.5+y*16)
end
if x > 1 and self.grid[y][x-1] == empty then
love.graphics.line(47.5+x*16, -0.0+y*16, 47.5+x*16, 16.0+y*16)
end
if x < 10 and self.grid[y][x+1] == empty then
love.graphics.line(64.5+x*16, -0.0+y*16, 64.5+x*16, 16.0+y*16)
end
end
end
end
end
end
return Grid