Learn to Code Space Invaders – Lesson 14 – The Aliens Are Here!
9th August 2019
Learn to Code Space Invaders – Lesson 15 – Aliens on the Move
28th August 2019
Write Your First Computer Game in Only 25 Minutes!
Starting with just a standard computer we’ll install our games development system and write a computer game from scratch in just 25 minutes!
Follow me as I build the game live on screen so you can see just how easy it is to get set up and coding with my ‘Learn To Code’ courses.
Make learning to code fun by building your own games!
Anyone can learn to code so click play below to get started right now!
Code Listing
-- title: Pong
-- author: Bob Grant
-- desc: Pong Game
-- script: lua
screenMaxX = 232
screenMaxY = 120
ball = {
x = 120,
y = 0,
xSpeed = 2,
ySpeed = 1
}
bat = {
x = 114,
y = 120,
speed = 4
}
score = 0
function TIC()
moveBat()
moveBall()
checkHit()
cls()
print("score = "..score,3,3)
drawWalls()
drawBat()
drawBall()
end
function moveBat()
if (btn(2)) then
bat.x = bat.x - bat.speed
end
if (btn(3)) then
bat.x = bat.x + bat.speed
end
if (bat.x > (screenMaxX - 8)) then
bat.x = screenMaxX - 8
elseif (bat.x < 0) then
bat.x = 0
end
end
function drawBat()
spr(0, bat.x, bat.y, 0,1,0,0,2,1)
end
function drawWalls()
line(0,127,0,0,15)
line(0,0,239,0,15)
line(239,0,239,127,15)
end
function moveBall()
ball.x = ball.x + ball.xSpeed
ball.y = ball.y + ball.ySpeed
if (ball.x > screenMaxX) then
ball.x = screenMaxX
ball.xSpeed = -ball.xSpeed
sfx(0,40,5)
elseif (ball.x < 0) then
ball.x = 0
ball.xSpeed = -ball.xSpeed
sfx(0,40,5)
end
if (ball.y < 0) then
ball.y = 0
ball.ySpeed = -ball.ySpeed
sfx(0,50,5)
end
end
function drawBall()
spr(16, ball.x, ball.y)
end
function checkHit()
if (ball.ySpeed > 0) then
if (ball.y > (bat.y - 8))
and (ball.y < (bat.y)) then
if (ball.x > (bat.x - 6))
and (ball.x < (bat.x + 22)) then
ball.ySpeed = -ball.ySpeed
ball.xSpeed = ball.xSpeed +
math.random(-1,1)
score = score + 1
sfx(0,20,5)
end
end
end
end
