moving animations around

main.go

@@ -36,7 +36,8 @@ type Animation struct {
 	width    int
 	stroke   int
 	image    []image.Image
-	updown   int
+	images   map[string]image.Image
+	updown   string
 	mqmsg    chan mqtt.Message
 	msg      string
 
@@ -112,6 +113,7 @@ func fatal(err error) {
 
 //initializes the struct for the an play animation function, this could all be dumped into function that's wrapping go routine if I wanted
 func NewAnimation(sz image.Point, mqMessages chan mqtt.Message) *Animation {
+	imageMap := make(map[string]image.Image)
 	reader, err := os.Open("marioUp.png")
 	if err != nil {
 		log.Fatal(err)
@@ -120,7 +122,7 @@ func NewAnimation(sz image.Point, mqMessages chan mqtt.Message) *Animation {
 
 	//marioUp := imaging.FlipH(imaging.Resize(rawMario, 16, 16, imaging.Lanczos))
 	marioUp := imaging.Resize(rawMario, 16, 16, imaging.Lanczos)
-
+	imageMap["marioUp"] = marioUp
 	reader, err = os.Open("marioDown.png")
 	if err != nil {
 		log.Fatal(err)
@@ -128,15 +130,17 @@ func NewAnimation(sz image.Point, mqMessages chan mqtt.Message) *Animation {
 	rawMario, _, err = image.Decode(reader)
 	//marioDown := imaging.FlipH(imaging.Resize(rawMario, 16, 16, imaging.Lanczos))
 	marioDown := imaging.Resize(rawMario, 16, 16, imaging.Lanczos)
-	images := []image.Image{marioUp, marioDown}
+	imageMap["marioDown"] = marioDown
+	imageSlice := []image.Image{marioUp, marioDown}
 	return &Animation{
 		ctx:       gg.NewContext(sz.X, sz.Y),
 		dir:       image.Point{1, 1},
 		height:    8,
 		width:     8,
 		stroke:    8,
-		image:     images,
-		updown:    0,
+		image:     imageSlice,
+		images:    imageMap,
+		updown:    "marioUp",
 		mqmsg:     mqMessages,
 		countDown: 5000,
 	}
@@ -145,26 +149,20 @@ func NewAnimation(sz image.Point, mqMessages chan mqtt.Message) *Animation {
 func appendImage(img string, a *Animation) {
 	baseImage, _ := b64.StdEncoding.DecodeString(img)
 	bigImage, _, _ := image.Decode(bytes.NewReader(baseImage))
-	a.image = append(a.image, imaging.Resize(bigImage, 64, 64, imaging.Lanczos))
+	a.images["doorbell"] = imaging.Resize(bigImage, 64, 64, imaging.Lanczos)
 }
 
 // what happens each frame, at an interval of 50 milliseconds
 func (a *Animation) Next() (image.Image, <-chan time.Time, error) {
 	incoming := incomingImage{}
-	defer a.updatePosition()
-	a.ctx.SetColor(color.Black)
-	a.ctx.Clear()
-	if a.dir.X == 1 {
-		a.ctx.DrawImageAnchored(a.image[a.updown], a.position.X, a.position.Y, 0.5, 0.5)
-	} else {
-		a.ctx.DrawImageAnchored(imaging.FlipH(a.image[a.updown]), a.position.X, a.position.Y, 0.5, 0.5)
-	}
-	if len(a.image) == 3 {
+	a.animateMario()
+	if a.images["doorbell"] != nil {
 		if a.countDown > 0 {
 			a.ctx.DrawImageAnchored(a.image[2], 0, 0, 0, 0)
 			a.countDown -= 50
 		} else {
-			a.image = a.image[:len(a.image)-1]
+			//a.image = a.image[:len(a.image)-1]
+			delete(a.images, "doorbell")
 			a.countDown = 5000
 		}
 	}
@@ -183,16 +181,27 @@ func (a *Animation) Next() (image.Image, <-chan time.Time, error) {
 	return a.ctx.Image(), time.After(time.Millisecond * 50), nil
 }
 
+func (a *Animation) animateMario() {
+	defer a.updateMarioPosition()
+	a.ctx.SetColor(color.Black)
+	a.ctx.Clear()
+	if a.dir.X == 1 {
+		a.ctx.DrawImageAnchored(a.images[a.updown], a.position.X, a.position.Y, 0.5, 0.5)
+	} else {
+		a.ctx.DrawImageAnchored(imaging.FlipH(a.images[a.updown]), a.position.X, a.position.Y, 0.5, 0.5)
+	}
+}
+
 //what mario does every frame
-func (a *Animation) updatePosition() {
+func (a *Animation) updateMarioPosition() {
 	a.position.X += 1 * a.dir.X
 	a.position.Y += 1 * a.dir.Y
 
 	if a.position.Y+a.height > a.ctx.Height() {
 		a.dir.Y = -1
-		a.updown = 0
+		a.updown = "marioUp"
 	} else if a.position.Y-a.height < 0 {
-		a.updown = 1
+		a.updown = "marioDown"
 		a.dir.Y = 1
 	}