From e5eb9ecafbfd6baffc5e2b9ae3f512b91f007257 Mon Sep 17 00:00:00 2001
From: swrring <swrring@naver.com>
Date: Thu, 7 May 2026 15:55:18 +0900
Subject: [PATCH] BT5-Dev #20: IgnoreCollision Update fallback + const
 STOMP_MIN_DY 0.8 + velocity.y<0

---
 Assets/Scripts/Gameplay/PlayerEnemyCollision.cs | 10 +++++++---
 Assets/Scripts/Mechanics/EnemyController.cs     | 13 +++++++++++++
 2 files changed, 20 insertions(+), 3 deletions(-)

diff --git a/Assets/Scripts/Gameplay/PlayerEnemyCollision.cs b/Assets/Scripts/Gameplay/PlayerEnemyCollision.cs
index 89b192e..7f200e5 100644
--- a/Assets/Scripts/Gameplay/PlayerEnemyCollision.cs
+++ b/Assets/Scripts/Gameplay/PlayerEnemyCollision.cs
@@ -21,16 +21,20 @@ namespace Platformer.Gameplay
         /// <summary>BT5-Dev #16 — EnemyController.Update에서 측정한 Player·Enemy y 차 (밟기 판정 영역).</summary>
         public float dyAtCollision;
 
+        // BT5-Dev #20 — Enemy.prefab 직렬화 영역 우회 영역 const 영역
+        // Player.height 1.15 + Enemy.height 1.26 → 발 닿는 영역 dy ≈ 1.0
+        const float STOMP_MIN_DY = 0.8f;
+
         PlatformerModel model = Simulation.GetModel<PlatformerModel>();
 
         public override void Execute()
         {
             if (player == null || player.health == null || enemy == null) return;
 
-            // BT5-Dev #16 — Distance 기반 밟기 판정. dyAtCollision > stompMinDy = Player가 Enemy 위에서 밟음.
-            bool stomped = dyAtCollision > enemy.stompMinDy;
+            // BT5-Dev #20 — 밟기 영역: Player 발이 Enemy 영역 위 + 하강 중 (점프 후 영역 보장)
+            bool stomped = dyAtCollision > STOMP_MIN_DY && player.velocity.y < 0f;
 
-            Debug.Log($"[PEC] stomped={stomped} dy={dyAtCollision:F2} (threshold>{enemy.stompMinDy}) pInvuln={player.health.IsInvulnerable}");
+            Debug.Log($"[PEC] stomped={stomped} dy={dyAtCollision:F2} vy={player.velocity.y:F2} (thr>{STOMP_MIN_DY}, vy<0) pInvuln={player.health.IsInvulnerable}");
 
             if (stomped)
             {
diff --git a/Assets/Scripts/Mechanics/EnemyController.cs b/Assets/Scripts/Mechanics/EnemyController.cs
index eadbf4a..b67e8bb 100644
--- a/Assets/Scripts/Mechanics/EnemyController.cs
+++ b/Assets/Scripts/Mechanics/EnemyController.cs
@@ -37,6 +37,7 @@ namespace Platformer.Mechanics
         public Bounds VisualBounds => spriteRenderer != null ? spriteRenderer.bounds : _collider.bounds;
 
         PlayerController _cachedPlayer;
+        bool _ignoreCollisionApplied;
 
         void Awake()
         {
@@ -85,6 +86,18 @@ namespace Platformer.Mechanics
                     Debug.Log($"[BT17-Update@{name}] f={Time.frameCount} cached={(_cachedPlayer != null ? _cachedPlayer.name : "NULL")} pgoTag={(pgo != null ? pgo.name : "NULL")} allPCcount={allCount}");
                 }
             }
+
+            // BT20 — IgnoreCollision 영역 Awake 시점 Player 발견 X 영역 fallback. Update 영역에서 발견 직후 1회 영역 호출.
+            if (_cachedPlayer != null && !_ignoreCollisionApplied && _collider != null)
+            {
+                var pc = _cachedPlayer.GetComponent<Collider2D>();
+                if (pc != null)
+                {
+                    Physics2D.IgnoreCollision(_collider, pc, true);
+                    _ignoreCollisionApplied = true;
+                    Debug.Log($"[BT20-Ignore@{name}] Player↔Enemy IgnoreCollision applied");
+                }
+            }
             if (_cachedPlayer != null && _cachedPlayer.health != null && _cachedPlayer.health.IsAlive)
             {
                 // BT5-Dev #16 — Distance 기반 단순 감지 (Bounds 영역 산수 영역 의존 X·항상 작동)