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Anim

demo

Anim is an easy to use animation player package for Ebitengine v2

import "github.com/setanarut/anim"

Tutorial

Let's declare a global variable for the animation player

var animPlayer *anim.AnimationPlayer

Make new animation player from sprite atlas

runner

spriteSheet := ebiten.NewImageFromImage(img)
animPlayer = anim.NewAnimationPlayer(spriteSheet)

Let's specify the coordinates of the animations for the player states. The figure shows the coordinates for "run" state. NewAnimationState("run", 0, 32, 32, 32, 8, false, false)

diag

animPlayer.NewAnimationState("idle", 0, 0, 32, 32, 5, false, false).FPS = 5
animPlayer.NewAnimationState("run", 0, 32, 32, 32, 8, false, false)
animPlayer.NewAnimationState("jump", 0, 32*2, 32, 32, 4, false, false)

Let's set the initial state.

animPlayer.SetState("idle")

Update animation player

func (g *Game) Update() error {
	animPlayer.Update()

Let's update the states according to the character's movement.

if ebiten.IsKeyPressed(ebiten.KeySpace) {
    animPlayer.SetState("jump")
} else if ebiten.IsKeyPressed(ebiten.KeyD) {
    animPlayer.SetState("run")
} else if ebiten.IsKeyPressed(ebiten.KeyA) {
    animPlayer.SetState("run")
    // Flip X axis with *ebiten.DrawImageOptions.GeoM
    DIO.GeoM.Scale(-1, 1)
} else {
    animPlayer.SetState("idle")
}

Finally let's draw Animation player

func (g *Game) Draw(screen *ebiten.Image) {
	screen.DrawImage(animPlayer.CurrentFrame, DIO)

Example

Run demo on your local machine

go run github.com/setanarut/anim/examples/demo@latest