PIGO8 Cheatsheet

Quick Reference

Initialization

p8.InsertGame(&myGame{})  // Register game
p8.Play()                 // Start with defaults
p8.PlayGameWith(settings) // Start with custom settings

Screen

p8.Cls(color)            // Clear screen
p8.GetScreenWidth()      // Get width (128)
p8.GetScreenHeight()     // Get height (128)

Drawing

p8.Pset(x, y, color)     // Set pixel
p8.Pget(x, y)            // Get pixel color
p8.Line(x1, y1, x2, y2, color)
p8.Rect(x1, y1, x2, y2, color)
p8.Rectfill(x1, y1, x2, y2, color)
p8.Circ(x, y, r, color)
p8.Circfill(x, y, r, color)
p8.Print(text, x, y, color)

Sprites

p8.Spr(n, x, y)                    // Draw sprite
p8.Spr(n, x, y, w, h, flipX, flipY)
p8.Sspr(sx, sy, sw, sh, dx, dy)    // Draw region
p8.Sget(x, y)                      // Get spritesheet pixel
p8.Sset(x, y, color)               // Set spritesheet pixel
bitfield, isSet := p8.Fget(sprite, flag)  // Get flag (returns 2 values)
p8.Fset(sprite, flag, value)              // Set sprite flag

Maps

p8.Map(mx, my, sx, sy, w, h, layers)
p8.Mget(x, y)            // Get tile sprite
p8.Mset(x, y, sprite)    // Set tile sprite

Input

p8.Btn(button)           // Is button held?
p8.Btnp(button)          // Was button just pressed?
p8.GetMouseXY()          // Get mouse position
// Buttons: LEFT, RIGHT, UP, DOWN, O (Z), X (X)
// ButtonStart (Enter), ButtonMouseLeft, etc.

Audio

p8.Music(n)              // Play music/sfx
p8.Music(-1)             // Stop all
p8.StopMusic(n)          // Stop specific

Camera

p8.Camera(x, y)          // Set offset
p8.Camera()              // Reset to (0,0)

Palette

p8.Pal(c0, c1)           // Swap colors
p8.Pal()                 // Reset palette swap
p8.Palt(color, transparent)  // Set transparency
p8.Palt()                // Reset transparency
p8.Color(c)              // Set draw color

Collision

p8.ColorCollision(x, y, color)
p8.MapCollision(x, y, flag, w, h)

Math

p8.Flr(n)                // Floor (returns int)
p8.Rnd(n)                // Random 0 to n-1 (returns int)
p8.Sqrt(n)               // Square root (returns float64)
p8.Sign(float64(n))      // -1.0 or 1.0 (takes float64)
p8.Time()                // Seconds elapsed (returns float64)

Settings

settings := p8.NewSettings()
settings.ScreenWidth = 160
settings.ScreenHeight = 144
settings.ScaleFactor = 4
settings.TargetFPS = 60
settings.WindowTitle = "My Game"
settings.Fullscreen = true
settings.DisableHiDPI = true  // Default: true

Color Palette

Button Constants

Game Structure

type game struct {
    // Your state
}

func (g *game) Init()   { /* once at start */ }
func (g *game) Update() { /* every frame */ }
func (g *game) Draw()   { /* every frame */ }

func main() {
    p8.InsertGame(&game{})
    p8.Play()
}

Common Patterns

Movement

if p8.Btn(p8.LEFT)  { g.x-- }
if p8.Btn(p8.RIGHT) { g.x++ }
if p8.Btn(p8.UP)    { g.y-- }
if p8.Btn(p8.DOWN)  { g.y++ }

Animation

frame := int(p8.Time() * 10) % 4
p8.Spr(1 + frame, x, y)

Tile Collision

tileX := p8.Flr(g.x / 8)
tileY := p8.Flr(g.y / 8)
if p8.MapCollision(g.x, g.y, 0) {
    // Hit solid tile
}