Set pivot

Engine/src/shared/sprites.ts

@@ -54,6 +54,8 @@ export class SpriteInstance {
       s.x -= this.frame.originX
       s.y -= this.frame.originY
       this.container.addChild(s)
+      this.container.pivot.x -= this.frame.originX
+      this.container.pivot.y -= this.frame.originY
     }
   }