ExpenditureEffect

Overview

Shows a brief -Cost$ popup using a DOTweenAnimation when an Upgrade is purchased.

Serialized

• UpgradeEvent upgradePurchasedEvent
• DOTweenAnimation tween
• TextMeshProUGUI text

Behavior

• Start() → register to event, set initial alpha to 0.
• OnUpgradePurchased(Upgrade u) → set text to "-{u.cost}$", set alpha to 1, DORestart() and DOPlay() the tween.
• OnDestroy() → unregister.