Tutorial

Welcome to the tutorial! Today we're going to be learning the basics of AstralCode.

Let's start by making a Flappy Bird game!

Click Next to continue.

1/14

Sprites

For working with sprites.

sprite.size: The size of the sprite.
Example: sprite.size = 50
sprite.visible: Whether or not the sprite is visible.
Example: sprite.visible = false
sprite.x: The horizontal position of the sprite.
Example: sprite.x = 100
sprite.y: The vertical position of the sprite.
Example: sprite.y = 200
sprite.rotation: The rotation of the sprite.
Example: sprite.rotation = 45
touching(object, other): Returns true if the object is touching the other object.
Example: if (touching(player, coin)) { score += 1 }

For controlling when functions run, how often, and conditional execution.

forever(func): Runs the function every frame.
Example: forever(myFunction)
after(seconds, func): Runs the function after the specified number of seconds.
Example: after(2, myFunction)
every(seconds, func): Runs the function every specified number of seconds.
Example: every(1, myFunction)
if (condition) { ... }: Executes code block if condition is true.
Example: if (score > 100) { levelComplete() }
if (condition) { ... } else { ... }: Executes first block if condition is true, second block if false.
Example: if (health > 0) { continue() } else { gameOver() }
if (condition) { ... } else if (condition) { ... } else { ... }: Multiple conditional branches.
Example: if (score > 100) { giveGold() } else if (score > 50) { giveSilver() } else { giveBronze() }

For reading input from the keyboard and mouse.

Mouse.x: The horizontal position of the mouse cursor.
Example: sprite.x = Mouse.x
Mouse.y: The vertical position of the mouse cursor.
Example: sprite.y = Mouse.y
Mouse.isDown(button): Returns true if the specified button is down.
Example: if (Mouse.isDown(MouseButton.Left)) { shoot() }
Keyboard.keyTapped(key): Returns true if the specified key was tapped.
Example: if (Keyboard.keyTapped(Key.Space)) { jump() }
Keyboard.keyHeld(key): Returns true if the specified key is held down.
Example: if (Keyboard.keyHeld(Key.ArrowRight)) { moveRight() }

Additional math functions.

Math.random(min, max): Returns a random number between min and max.
Example: let x = Math.random(0, 100)
Math.sin(angle): Returns the sine of the angle.
Example: let height = Math.sin(angle) * 100
Math.cos(angle): Returns the cosine of the angle.
Example: let width = Math.cos(angle) * 100
Math.tan(angle): Returns the tangent of the angle.
Example: let slope = Math.tan(45)

Rotation