Added animatiom over flag and pause switch in example

animation/animation.go

@@ -59,6 +59,7 @@ type Animation struct {
 	elapsed            float64
 	Position           pixel.Vec
 	Dir                float64
+	over               bool
 }
 
 // NewAnimation returns a new Sprite instance to be drawn at position x, y
@@ -126,6 +127,7 @@ func (a *Animation) SetCurrentAnim(ID string) error {
 			a.currentFrameNumber = a.lastFrame()
 		}
 		a.elapsed = 0
+		a.over = false
 	}
 	return nil
 }
@@ -170,6 +172,7 @@ func (a *Animation) nextFrameIndex() int {
 	if !a.isLastFrame(a.currentFrameNumber) {
 		return a.currentFrameNumber + 1
 	}
+	a.over = true
 	return a.currentFrameNumber
 }
 
@@ -181,6 +184,12 @@ func (a *Animation) isLastFrame(number int) bool {
 	return len(a.anims[a.currentAnimID].frames)-1 == number
 }
 
+// CurrentFrameNumber returns the frame number that it is drawn
 func (a *Animation) CurrentFrameNumber() int {
 	return a.currentFrameNumber
 }
+
+// IsOver returns wheter an animation is over or not
+func (a *Animation) IsOver() bool {
+	return a.over
+}

examples/animated-sprite/game.go

@@ -14,6 +14,7 @@ type Game struct {
 	level  *Level
 	canvas *pixelgl.Canvas
 	imd    *imdraw.IMDraw
+	paused bool
 }
 
 func NewGame(canvas *pixelgl.Canvas, imd *imdraw.IMDraw) *Game {
@@ -38,8 +39,11 @@ func NewGame(canvas *pixelgl.Canvas, imd *imdraw.IMDraw) *Game {
 }
 
 func (g *Game) Loop(win *pixelgl.Window, dt float64) (string, error) {
-	g.imd.Clear()
 	g.readInput(win, dt)
+	if g.paused {
+		return "game", nil
+	}
+	g.imd.Clear()
 	delta := g.hero.Displacement(dt)
 	sol := g.hero.boundingShape().Resolve(delta, g.level.Bounds["level1-background"]...)
 
@@ -50,6 +54,7 @@ func (g *Game) Loop(win *pixelgl.Window, dt float64) (string, error) {
 
 	g.imd.Draw(g.canvas)
 	g.canvas.Draw(win, pixel.IM.Moved(win.Bounds().Center()).Scaled(win.Bounds().Center(), zoom))
+
 	return "game", nil
 }
 
@@ -62,5 +67,7 @@ func (g *Game) readInput(win *pixelgl.Window, dt float64) {
 		g.hero.Right(dt)
 	} else if !win.Pressed(pixelgl.KeyLeft) && !win.Pressed(pixelgl.KeyRight) && g.hero.Velocity(physic.AxisX) != 0 {
 		g.hero.Decelerate(physic.AxisX, dt)
+	} else if win.JustPressed(pixelgl.KeyP) {
+		g.paused = !g.paused
 	}
 }