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main.lua
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main.lua
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-- Bird metatable
Bird = {}
Bird.__index = Bird
function Bird.new(x, y, jump, image, originx, originy)
local self = setmetatable({}, Bird)
self.x = x
self.y = y
self.xspeed = 0
self.yspeed = 0
self.gravity = 0
self.friction = 1
self.originx = originx
self.originy = originy
self.image = image
self.jump = jump
self.dead = false
return self
end
function Bird:update()
self.yspeed = self.yspeed + self.gravity
self.xspeed = self.xspeed * self.friction
self.x = self.x + self.xspeed
self.y = self.y + self.yspeed
if self.y + self.originy > 200 then
self:die()
self.xspeed = 0
end
if self.dead and self.y > 200 - 9 then
self.y = 200 - 9
end
end
function Bird:keypressed(key)
if key == self.jump and not self.dead then
self.yspeed = -3.7 --4.2 before
end
end
function Bird:die()
--do white flash and screen shake
self.dead = true
self.xspeed = 0
end
function Bird:draw()
if self.yspeed < 0 then
tilt = math.pi / 8
--tilt = self.yspeed / (-4.5) * math.pi / 6
else
tilt = math.pi / 8 - (math.min(1, self.yspeed / 6) * (math.pi / 2 + math.pi / 8))
--tilt = math.min(1, self.yspeed / 6) * (-math.pi / 2)
end
if self.xspeed == 0 and not self.dead then
tilt = 0
end
quad = love.graphics.newQuad(self.x, self.y, 17, 12, self.image:getWidth(), self.image:getHeight())
love.graphics.draw(
self.image, self.x, self.y, -tilt, 1, 1, self.originx, self.originy)
--love.graphics.drawq(self.image, quad, self.x, self.y)
end
-- Pipe metatable
Pipe = {}
Pipe.__index = Pipe
function Pipe.new(x, y, bottomimg, topimg)
local self = setmetatable({}, Pipe)
self.x = x
self.y = y
self.bottomimg = bottomimg
self.topimg = topimg
self.past = false
return self
end
function Pipe:update()
if self.x < viewX - 26 then
self.x = self.x + 4 * hgap
self.y = math.random(12 + vgap, 188)
self.past = false
end
if collides(self.x, self.y, 26, 188,
bird.x - bird.originx + 1, bird.y - bird.originy + 1, 17 - 2, 12 - 1) or
collides (self.x, self.y - vgap - 188, 26, 188,
bird.x - bird.originx + 1, bird.y - bird.originy + 1, 17 - 2, 12 - 1) then
if not bird.dead then
bird:die()
end
end
if self.x < bird.x and not self.past then
self.past = true
score = score + 1
end
end
function Pipe:draw()
love.graphics.draw(self.bottomimg, self.x, self.y)
love.graphics.draw(self.topimg, self.x, self.y - vgap, 0, 1, 1, 0, 188)
end
function collides(x1, y1, w1, h1, x2, y2, w2, h2)
return
x1 < x2 + w2 and
x2 < x1 + w1 and
y1 < y2 + h2 and
y2 < y1 + h1
end
function love.load()
score = 0
numbers = {}
numbers[0] = love.graphics.newImage("0.png")
numbers[1] = love.graphics.newImage("1.png")
numbers[2] = love.graphics.newImage("2.png")
numbers[3] = love.graphics.newImage("3.png")
numbers[4] = love.graphics.newImage("4.png")
numbers[5] = love.graphics.newImage("5.png")
numbers[6] = love.graphics.newImage("6.png")
numbers[7] = love.graphics.newImage("7.png")
numbers[8] = love.graphics.newImage("8.png")
numbers[9] = love.graphics.newImage("9.png")
math.randomseed(os.time())
love.graphics.setCaption("Flappy Bird by PJ")
-- Initialize viewport
love.graphics.setMode(288, 512, false, true, 0)
viewX = 0
-- Initialize background/foreground
background = love.graphics.newImage("bcknd.png")
ground = love.graphics.newImage("ground.png")
getready = love.graphics.newImage("get ready.png")
diagram = love.graphics.newImage("diagram.png")
pressr = love.graphics.newImage("pressr.png")
difficulties = love.graphics.newImage("difficulties.png")
groundX0 = 0
groundX1 = 154
groundX2 = 308
groundoffset = 0
bird = Bird.new(50, 128, " ", love.graphics.newImage("bird.png"), 8, 6)
pipeimg = love.graphics.newImage("pipe.png")
toppipe = love.graphics.newImage("top pipe.png")
hgap = 84
vgap = 60
pipes = {}
npipes = 0
for i = 0, 3 do
pipes[i] = Pipe.new(200 + (i+1) * hgap, math.random(12 + vgap, 188),
pipeimg, toppipe)
npipes = npipes + 1
end
end
function love.update(dt)
bird:update()
for i = 0, npipes - 1 do
pipes[i]:update()
end
viewX = bird.x - 50
if bird.xspeed == 0 and not bird.dead then
groundX0 = groundX0 - 1.2
groundX1 = groundX1 - 1.2
groundX2 = groundX2 - 1.2
if groundX0 <= -154 then
groundX0 = groundX0 + 308
end
if groundX1 <= -154 then
groundX1 = groundX1 + 308
end
if groundX2 <= -154 then
groundX2 = groundX2 + 308
end
end
end
function love.keypressed(key)
if key == "escape" then
love.event.quit()
end
if key == " " and bird.xspeed == 0 and not bird.dead then
--pick difficulty
start()
end
if key == "r" and bird.dead then
score = 0
bird.x = 50
bird.y = 128
bird.gravity = 0
bird.yspeed = 0
bird.dead = false
for i = 0, 3 do
pipes[i] = Pipe.new(200 + (i+1) * hgap, math.random(12 + vgap, 188),
pipeimg, toppipe)
end
end
bird:keypressed(key)
end
function start()
bird.xspeed = 1.2
bird.gravity = 0.2 --0.25 before
groundoffset = groundX0 % 154
end
function love.draw()
-- Create viewport
love.graphics.scale(2, 2)
love.graphics.translate(-viewX, 0)
love.graphics.draw(background, viewX, 0)
for i = 0, npipes - 1 do
pipes[i]:draw()
end
bird:draw()
if bird.xspeed == 0 and not bird.dead then
love.graphics.draw(ground, groundX0, 200)
love.graphics.draw(ground, groundX1, 200)
love.graphics.draw(ground, groundX2, 200)
else
love.graphics.draw(ground, math.floor(viewX / 154) * 154 + groundoffset, 200)
love.graphics.draw(ground, (math.floor(viewX / 154) + 1) * 154 + groundoffset, 200)
love.graphics.draw(ground, (math.floor(viewX / 154) - 1) * 154 + groundoffset, 200)
end
if bird.xspeed == 0 and not bird.dead then
love.graphics.draw(getready, 29, 60)
love.graphics.draw(diagram, 50 + 14, 110)
end
if score > 9 then
love.graphics.draw(numbers[math.floor(score / 10)], viewX + 72 - 7, 18)
love.graphics.draw(numbers[score % 10], viewX + 72 + 1, 18)
else
love.graphics.draw(numbers[score % 10], viewX + 72 - 3, 18)
end
end