SimpleBreak
From OxeyeWiki
Contents |
Description
SimpleBreak is a very simple break-out game. Rendering is done with only rectangles, and all input is done with the mouse. A couple of sfxr sound effects have been added for some extra punch :)
Development time of this example was roughly one hour.
Download all files here: simplebreak.zip
Assets
Files
main.lua
math.randomseed( os.time() )
local gameData = { destructionCounter = 0, }
local gameField = {}
local player = { x = 0, y = 0, width = 100, height = 20, momentum = {}, momentumUpdate = 0 }
local maxMomentum, momentumTime = 8, .05
local balls = {}
local tileColors = {
{ a = 255, r = 160, g = 120, b = 120 },
{ a = 255, r = 180, g = 160, b = 130 },
{ a = 255, r = 240, g = 230, b = 160 },
{ a = 255, r = 240, g = 235, b = 220 },
}
local function addBall()
local ball = { x = 0, y = 0, width = 10, height = 10, dx = 0, dy = 0, momentum = {}, momentumUpdate = 0, state = "locked" }
table.insert(balls, ball)
return ball
end
local function addTile(x, y, width, height, hits)
local tile = {x = x, y = y, width = width, height = height, hits = hits}
table.insert(gameField, tile)
return tile
end
local function createLevel()
gameField = {} -- clear old set
local w,h = video.getScreenSize()
local currentY = math.random(0, 5)
while currentY < h / 2 do
local tileHeight = math.random(30, 50)
local currentX = math.random(0, 10)
while currentX < w do
local tileWidth = math.random(40, 80)
if tileWidth + currentX > w then
tileWidth = w - currentX
end
if tileWidth > 10 then
addTile(currentX, currentY, tileWidth, tileHeight, math.random(1, 4))
end
currentX = currentX + tileWidth + math.random(3, 4)
end
currentY = currentY + tileHeight + math.random(3, 4)
end
end
--[[
INIT METHOD
]]
local function mainInit()
createLevel()
addBall()
end
hook.add("gameInit", mainInit)
local function updateMomentum(object, time)
object.momentumUpdate = object.momentumUpdate + time
if object.momentumUpdate > momentumTime then
object.momentumUpdate = object.momentumUpdate - momentumTime
table.insert(object.momentum, {x = object.x, y = object.y} )
while #object.momentum > maxMomentum do
table.remove(object.momentum, 1)
end
end
end
--[[
UPDATE METHOD
]]
local function mainUpdate(time)
if time > .06 then
time = .06
end
local w, h = video.getScreenSize()
-- update momentum
updateMomentum(player, time)
for index, ball in ipairs(balls) do
updateMomentum(ball, time)
end
-- update player position
local mx, my = daisy.getMousePosition()
player.x = mx - player.width / 2
if player.x < 0 then
player.x = 0
elseif player.x + player.width > w then
player.x = w - player.width
end
player.y = h - player.height - 10
-- update balls
for ballIndex, ball in ipairs(balls) do
if ball.state == "locked" then
ball.x = player.x + (player.width - ball.width) / 2
ball.y = player.y - ball.height
if daisy.isMouseButtonPressed(0) then
ball.state = "action"
ball.dx, ball.dy = 0, -250
end
elseif ball.state == "action" then
ball.x, ball.y = ball.x + ball.dx * time, ball.y + ball.dy * time
if ball.x + ball.width > w then
ball.dx = -ball.dx
ball.x = w - ball.width
elseif ball.x < 0 then
ball.dx = -ball.dx
ball.x = 0
end
if ball.y < 0 then
ball.dy = -ball.dy
ball.y = 0
end
for index, tile in ipairs(gameField) do
if ball.x + ball.width >= tile.x and ball.x <= tile.x + tile.width and
ball.y + ball.height >= tile.y and ball.y <= tile.y + tile.height then
if tile.hits > 1 then
tile.hits = tile.hits - 1
if ball.y < tile.y or ball.y + ball.height > tile.y + tile.height then
ball.dy = -ball.dy
end
if ball.x < tile.x or ball.x + ball.width > tile.x + tile.width then
ball.dx = -ball.dx
end
audio.playSound("hit.wav")
else
table.remove(gameField, index)
audio.playSound("break.wav")
gameData.destructionCounter = gameData.destructionCounter + 1
if gameData.destructionCounter % 10 == 0 then
addBall()
end
end
break -- only allow one tile collision per update
end
end
if ball.x + ball.width >= player.x and ball.x <= player.x + player.width and
ball.y + ball.height >= player.y and ball.y <= player.y + player.height then
if ball.dy > 0 then
ball.dy = -(ball.dy + 1)
audio.playSound("bounce.wav")
end
ball.dx = ((ball.x + ball.width / 2) - (player.x + player.width / 2)) * 3
end
if ball.y > h then
-- note, removing stuff inside a loop will mess up the loop index, so this is not best practise
table.remove(balls, ballIndex)
end
end
end
end
hook.add("frameUpdate", mainUpdate)
--[[
RENDER METHOD
]]
local function mainRender()
local w,h = video.getScreenSize()
video.renderRectangle(0, 0, w, h, 255, 40, 60, 80)
for index, tile in ipairs(gameField) do
local color = tileColors[tile.hits]
video.renderRectangle(tile.x, tile.y, tile.width, tile.height, color.a, color.r, color.g, color.b)
end
-- render player
local intensity = 1
for i=#player.momentum, 1, -1 do
intensity = intensity * .8
local a, r, g, b = math.floor(intensity * 255), 255, 255, 255
video.renderRectangle(player.momentum[i].x, player.y, player.width, player.height, a, r, g, b)
end
video.renderRectangle(player.x, player.y, player.width, player.height, 255, 255, 255, 255)
-- render balls
for index, ball in ipairs(balls) do
local intensity = 1
for i=#ball.momentum, 1, -1 do
intensity = intensity * .8
local a, r, g, b = math.floor(intensity * 255), 230, 80, 20
video.renderRectangle(ball.momentum[i].x, ball.momentum[i].y, ball.width, ball.height, a, r, g, b)
end
video.renderRectangle(ball.x, ball.y, ball.width, ball.height, 255, 230, 80, 20)
end
if #gameField == 0 then
video.renderText("VICTORY! - Press Ctrl+R to play again", w / 2, h - 100, 1)
elseif #balls == 0 then
video.renderText("GAME OVER - Press Ctrl+R to try again", w / 2, h - 100, 1)
end
end
hook.add("frameRender", mainRender)
