Build a simple animation viewer

internal/assetstore/object.go

@@ -90,6 +90,21 @@ func (o *Object) LoadSprites() error {
 	return nil
 }
 
+func (o *Object) Sprites(start, count int) ([]*Sprite, error) {
+	out := make([]*Sprite, count)
+
+	for i := start; i < start+count; i++ {
+		sprite, err := o.Sprite(i)
+		if err != nil {
+			return nil, err
+		}
+
+		out[i-start] = sprite
+	}
+
+	return out, nil
+}
+
 func (o *Object) Sprite(idx int) (*Sprite, error) {
 	if sprite := o.sprites[idx]; sprite != nil {
 		return sprite, nil