Projectiles

assets/Scripts/Game/Projectile/Projectile.ts

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+import { CircleCollider2D, Collider2D, Component, Contact2DType, _decorator } from "cc";
+import { ISignal } from "../../Services/EventSystem/ISignal";
+import { Signal } from "../../Services/EventSystem/Signal";
+import { ProjectileCollision } from "./ProjectileCollision";
+const { ccclass, property } = _decorator;
+
+@ccclass("Projectile")
+export class Projectile extends Component {
+    @property(CircleCollider2D) private collider: CircleCollider2D;
+    private contactBeginEvent: Signal<ProjectileCollision> = new Signal<ProjectileCollision>();
+
+    private isInit = false;
+    public tryInit(): void {
+        if (this.isInit) return;
+        this.isInit = true;
+
+        this.collider.on(Contact2DType.BEGIN_CONTACT, this.onColliderContactBegin, this);
+    }
+
+    public get ContactBeginEvent(): ISignal<ProjectileCollision> {
+        return this.contactBeginEvent;
+    }
+
+    private onColliderContactBegin(thisCollider: Collider2D, otherCollider: Collider2D): void {
+        this.contactBeginEvent.trigger({ otherCollider, projectile: this });
+    }
+}

assets/Scripts/Game/Projectile/Projectile.ts.meta

@@ -0,0 +1,9 @@
+{
+  "ver": "4.0.23",
+  "importer": "typescript",
+  "imported": true,
+  "uuid": "6a24e600-866b-4c0d-9a39-59bf222c2e50",
+  "files": [],
+  "subMetas": {},
+  "userData": {}
+}

assets/Scripts/Game/Projectile/ProjectileCollision.ts

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+import { Collider2D } from "cc";
+import { Projectile } from "./Projectile";
+
+export class ProjectileCollision {
+    public otherCollider: Collider2D;
+    public projectile: Projectile;
+}

assets/Scripts/Game/Projectile/ProjectileCollision.ts.meta

@@ -0,0 +1,9 @@
+{
+  "ver": "4.0.23",
+  "importer": "typescript",
+  "imported": true,
+  "uuid": "0f4db0b8-c13a-41cd-8d53-b87b6b615ac6",
+  "files": [],
+  "subMetas": {},
+  "userData": {}
+}