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Openai/694f5245-1110-800b-b182-7c2accd50046
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==== 因為 isometric 渲染把 world 投影成菱形，你眼睛看到“碰到”是 screen 上碰到， ==== 但判定如果還在 screen 上，就會跟 enemy 的 world 判定打架。 所以我才要它直接切成 world space collision＋F2 碰撞圈。 一開你就知道：到底是沒碰到、還是扣血沒生效。 如果你願意，我也可以再幫你寫一行「快速驗證」： 讓你按 K 直接對最近的敵人扣 10 血（debug only），這樣能立刻分辨是「HP系統壞」還是「碰撞壞」😈
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