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zhenyanghua/conf.lua

Created August 6, 2021 00:47
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Playground - Life
Raw
conf.lua
function love.conf(t)
t.window.title = "life"
t.window.width = 350
t.window.height = 600
end
Raw
main.lua
-- This is a walk around to help debugging
printLines = {}
function print(...)
for k, v in pairs({...}) do
table.insert(printLines, tostring(v))
end
end
-- this is to be placed at the end of the love.draw callback
function doPrint()
local linesToShow = 20
-- draws the last 10 items of printLines
for i = 1, math.min(linesToShow, table.getn(printLines)) do
local n = math.max(table.getn(printLines) - linesToShow, 0) + i
love.graphics.setColor(0, 0, 0)
love.graphics.print(printLines[n], 0, gridYCount * cellSize + i*15 + 1)
end
end
function love.load()
love.graphics.setBackgroundColor(1, 1, 1)
cellSize = 5
gridXCount = 70
gridYCount = 50
-- initial the grid that holds the cell
-- from top to bottom horizontally
grid = {}
for y = 1, gridYCount do
grid[y] = {}
for x = 1, gridXCount do
grid[y][x] = false
end
end
-- make holding a key to repeat the keypressed callback
love.keyboard.setKeyRepeat(true)
end
function liveOrDie(x, y)
local neighborCount = 0
for dy = -1, 1 do
for dx = -1, 1 do
if not (dy == 0 and dx ==0)
and grid[y + dy]
and grid[y + dy][x + dx] then
neighborCount = neighborCount + 1
end
end
end
if (grid[selectedY][selectedX] and (neighborCount == 2 or neighborCount == 3))
or (not grid[selectedY][selectedX] and neighborCount == 3) then
return true
else
return false
end
end
-- debugging function
function love.mousepressed(x, y, button)
if button == 2 then
local neighborCount = 0
print('Finding neighbors of grid['..selectedY..']['..selectedX..']')
for dy = -1, 1 do
for dx = -1, 1 do
print('Checking grid['..selectedY + dy..']['..selectedX + dx..']')
if not (dy == 0 and dx ==0)
and grid[selectedY + dy]
and grid[selectedY + dy][selectedX + dx] then
print('Neighbor found')
neighborCount = neighborCount + 1
end
end
end
print('Total neighbors: '..neighborCount)
end
end
function love.keypressed()
local nextGrid = {}
for y = 1, gridYCount do
nextGrid[y] = {}
for x = 1, gridXCount do
nextGrid[y][x] = liveOrDie(x, y)
end
end
grid = nextGrid
end
function love.update()
selectedX = math.min(math.floor(love.mouse.getX() / cellSize) + 1, gridXCount)
selectedY = math.min(math.floor(love.mouse.getY() / cellSize) + 1, gridYCount)
-- allow mouse down to make cell alive
if love.mouse.isDown(1) then
grid[selectedY][selectedX] = true
-- allow right click a cell to make it dead
elseif love.mouse.isDown(2) then
grid[selectedY][selectedX] = false
end
end
function love.draw()
-- draw all the cells from top to bottom horizontally
for y = 1, gridYCount do
for x = 1, gridXCount do
-- set up a border
local cellDrawSize = cellSize - 1
if x == selectedX and y == selectedY then
-- color for mouse cursor cell
love.graphics.setColor(0, 1, 1)
elseif grid[y][x] then
-- color for alive cell
love.graphics.setColor(1, 0, 1)
else
-- color for dead cell
love.graphics.setColor(.86, .86, .86)
end
-- draw one cell
love.graphics.rectangle(
'fill',
(x - 1) * cellSize,
(y - 1) * cellSize,
cellDrawSize,
cellDrawSize
)
end
end
-- debugging
love.graphics.setColor(0, 0, 0)
love.graphics.print(
'Selected x: '..selectedX..', selected y: '..selectedY,
0,
gridYCount * cellSize
)
doPrint()
end
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