Make animations work in the options screen

cmd/view-obj/main.go

@@ -24,6 +24,7 @@ var (
 
 type env struct {
 	obj  *assetstore.Object
+	spr  *assetstore.Sprite
 	step int
 
 	state     state
@@ -92,10 +93,17 @@ func main() {
 
 func (e *env) Update(screenX, screenY int) error {
 	if e.step == 0 || e.lastState != e.state {
+		sprite, err := e.obj.Sprite(e.state.spriteIdx)
+		if err != nil {
+			return err
+		}
+		e.spr = sprite
+
 		log.Printf(
-			"new state: sprite=%d/%d zoom=%.2f, origin=%+v",
+			"new state: sprite=%d/%d bounds=%+#v zoom=%.2f, origin=%+v",
 			e.state.spriteIdx,
 			e.obj.NumSprites,
+			e.spr.Rect,
 			e.state.zoom,
 			e.state.origin,
 		)