Learn SOLAR2D with Real Code Examples

-- main.lua
local count = 0
local counterText = display.newText("Count: 0", display.contentCenterX, 100, native.systemFont, 40)

local function updateCount(delta)
    count = count + delta
    counterText.text = "Count: " .. count
end

local incButton = display.newText("+", display.contentCenterX - 50, 200, native.systemFont, 50)
incButton:addEventListener("tap", function() updateCount(1) end)

local decButton = display.newText("-", display.contentCenterX + 50, 200, native.systemFont, 50)
decButton:addEventListener("tap", function() updateCount(-1) end)

A simple Solar2D Lua script to increment and decrement a counter displayed on the screen.

-- main.lua
local rect = display.newRect(display.contentCenterX, display.contentCenterY, 100, 100)
rect:setFillColor(1, 0, 0)

local function moveRect()
    rect.x = rect.x + 2
    if rect.x > display.contentWidth then
        rect.x = 0
    end
end

Runtime:addEventListener("enterFrame", moveRect)

Moves a display object across the screen continuously.

-- main.lua
local rect = display.newRect(display.contentCenterX, display.contentCenterY, 100, 100)
rect:setFillColor(0, 0, 1)

local function onTouch(event)
    if event.phase == "moved" then
        rect.x = event.x
        rect.y = event.y
    end
    return true
end

rect:addEventListener("touch", onTouch)

Allows a rectangle to be dragged around the screen using touch input.

-- main.lua
local button = display.newRect(display.contentCenterX, display.contentCenterY, 150, 80)
button:setFillColor(0, 1, 0)

local function onTap()
    button:setFillColor(math.random(), math.random(), math.random())
end

button:addEventListener("tap", onTap)

Creates a button that changes color when tapped.

-- main.lua
local circle = display.newCircle(display.contentCenterX, display.contentCenterY, 50)
circle:setFillColor(1, 0, 1)

local function fade()
    transition.to(circle, {time=1000, alpha=0, onComplete=function()
        transition.to(circle, {time=1000, alpha=1})
    end})
end

fade()

Fades a circle in and out continuously.

-- main.lua
local physics = require("physics")
physics.start()

local ball = display.newCircle(display.contentCenterX, 50, 30)
physics.addBody(ball, "dynamic", {radius=30, bounce=0.8})

local ground = display.newRect(display.contentCenterX, display.contentHeight - 50, display.contentWidth, 50)
physics.addBody(ground, "static")

Applies physics to a falling object.

-- main.lua
local sheetOptions = { width=64, height=64, numFrames=4 }
local sheet = graphics.newImageSheet("sprite.png", sheetOptions)
local sequence = { name="walk", start=1, count=4, time=400, loopCount=0 }
local sprite = display.newSprite(sheet, sequence)
sprite.x, sprite.y = display.contentCenterX, display.contentCenterY
sprite:play()

Animates a sprite using an image sheet.

-- main.lua
local function sayHello()
    print("Hello Solar2D!")
end

timer.performWithDelay(2000, sayHello, 0)

Displays a message every 2 seconds using a timer.

-- main.lua
local bg = display.newRect(display.contentCenterX, display.contentCenterY, display.contentWidth, display.contentHeight)
bg:setFillColor(0.5, 0.7, 1)

local title = display.newText("Welcome!", display.contentCenterX, 100, native.systemFontBold, 50)

Creates a basic scene with background and text.

-- main.lua
local sound = audio.loadSound("click.wav")
local rect = display.newRect(display.contentCenterX, display.contentCenterY, 150, 80)
rect:setFillColor(1, 0.5, 0)

local function playSound()
    audio.play(sound)
end

rect:addEventListener("tap", playSound)

Plays a sound effect when a rectangle is tapped.