From 07fd372981a16672af23e30816ade14fcb744804 Mon Sep 17 00:00:00 2001
From: chai <chaifix@163.com>
Date: Mon, 30 Aug 2021 13:49:30 +0800
Subject: =?UTF-8?q?=E5=87=BB=E4=B8=AD=E5=8F=8D=E9=A6=88?=
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---
 Assets/Scripts/Unit/Collider/CollisionSystem.cs | 110 ++++++++++++++++++++++--
 1 file changed, 104 insertions(+), 6 deletions(-)

(limited to 'Assets/Scripts/Unit/Collider/CollisionSystem.cs')

diff --git a/Assets/Scripts/Unit/Collider/CollisionSystem.cs b/Assets/Scripts/Unit/Collider/CollisionSystem.cs
index efbb2784..d5c96d0c 100644
--- a/Assets/Scripts/Unit/Collider/CollisionSystem.cs
+++ b/Assets/Scripts/Unit/Collider/CollisionSystem.cs
@@ -8,10 +8,18 @@ public struct ColliderDescriptor
 	public UnitCollider unitCollider;
 }
 
+public struct Box
+{
+    public Vector3 center;
+    public Vector3 size;
+}
+
 public struct CollisionInfo
 {
-	ColliderDescriptor collider; // 主动
-	ColliderDescriptor collidee; // 从动
+	public ColliderDescriptor collider; // 主动
+    public ColliderDescriptor collidee; // 从动
+    public Box intersection;
+    public bool isCollision;
 }
 
 public class CollisionSystem : SingletonMB<CollisionSystem>
@@ -77,10 +85,19 @@ public class CollisionSystem : SingletonMB<CollisionSystem>
 			for (int j = 0; j < hurtboxes.Count; ++j)
 			{
 				ColliderDescriptor hurtbox = hurtboxes[j];
-				if (hitbox.unitCollider == hurtbox.unitCollider) // 同一个角色的hitbox和hurtbox不交互
-					continue; 
-
-			}
+				if (hitbox.unitCollider == hurtbox.unitCollider) 
+					continue;
+                if (hitbox.unitCollider.owner.type == hurtbox.unitCollider.owner.type)
+                    continue;
+                CollisionInfo collision = ColliderUtility.GetCollision(hitbox, hurtbox);
+                if (!collision.isCollision)
+                    continue;
+                if (!hitbox.unitCollider.CanCollide(hitbox.colliderInfo.colliderHash, hurtbox.unitCollider.owner.GetHashCode()))
+                    continue;
+                hitbox.unitCollider.RecordCollision(hitbox.colliderInfo.colliderHash, hurtbox.unitCollider.owner.GetHashCode());
+                hitbox.unitCollider.owner.OnHit(collision);
+                hurtbox.unitCollider.owner.OnGetHit(collision);
+            }
 		}
 
 		ListPool<ColliderDescriptor>.Release(hitboxes);
@@ -105,4 +122,85 @@ public class CollisionSystem : SingletonMB<CollisionSystem>
 
 	}
 
+    private void OnDrawGizmos()
+    {
+    }
+
 }
+
+public static class ColliderUtility
+{
+    public static CollisionInfo GetCollision(ColliderDescriptor collider, ColliderDescriptor collidee)
+    {
+        CollisionInfo collision = new CollisionInfo();
+        collision.collider = collider;
+        collision.collidee = collidee;
+        Box colliderBox = GetColliderInWorldSpace(collider);
+        Box collideeBox = GetColliderInWorldSpace(collidee);
+        Box intersection = GetIntersection(colliderBox, collideeBox);
+        collision.intersection = intersection;
+        collision.isCollision = intersection.size.magnitude != 0;
+        return collision;
+    }
+
+    public static Box GetColliderInWorldSpace(ColliderDescriptor collider)
+    {
+        Box box = new Box();
+        Vector3 fac = new Vector3(1, 1, collider.unitCollider.owner.transform.forward.normalized == Vector3.forward ? 1 : -1);
+        Vector3 unitPos = collider.unitCollider.owner.transform.position;
+        Vector3 pos = Vector3.zero; // gizmo位置
+        Vector3 localPos = collider.colliderInfo.position;
+        Vector3 localSize = collider.colliderInfo.size;
+        var pivot = collider.colliderInfo.pivot;
+        switch (pivot)
+        {
+            case ColliderBox.Pivot.MiddleBottom:
+                localPos.y += localSize.y / 2;
+                break;
+        }
+        pos = unitPos + Vector3.Scale(localPos, fac);
+        box.center = pos;
+        box.size = localSize;
+        return box;
+    }
+
+    public static Box GetIntersection(Box b1, Box b2)
+    {
+        bool isIntersection = true;
+
+        float l1 = b1.center.x - b1.size.x / 2;
+        float r1 = b1.center.x + b1.size.x / 2;
+        float l2 = b2.center.x - b2.size.x / 2;
+        float r2 = b2.center.x + b2.size.x / 2;
+        isIntersection &= r1 >= l2 && l1 <= r2;
+
+        float o1 = b1.center.y - b1.size.y / 2;
+        float t1 = b1.center.y + b1.size.y / 2;
+        float o2 = b2.center.y - b2.size.y / 2;
+        float t2 = b2.center.y + b2.size.y / 2;
+        isIntersection &= t1 >= o2 && o1 <= t2;
+
+        float c1 = b1.center.z - b1.size.z / 2;
+        float f1 = b1.center.z + b1.size.z / 2;
+        float c2 = b2.center.z - b2.size.z / 2;
+        float f2 = b2.center.z + b2.size.z / 2;
+        isIntersection &= f1 >= c2 && c1 <= f2;
+
+        if(!isIntersection)
+        {
+            return new Box();
+        }
+
+        Box box = new Box();
+        float l = Mathf.Max(l1, l2);
+        float r = Mathf.Min(r1, r2);
+        float b = Mathf.Max(o1, o2);
+        float t = Mathf.Min(t1, t2);
+        float c = Mathf.Max(c1, c2);
+        float f = Mathf.Max(f1, f2);
+        box.center = new Vector3((l + r) / 2, (b + t) / 2, (c + f) / 2 );
+        box.size = new Vector3(r - l, t - b, f - c);
+        return box;
+    }
+
+}
\ No newline at end of file
-- 
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