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assets/scripts/GoalkeeperAI.ts

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+// assets/scripts/GoalkeeperAI.ts
+import { _decorator, Component, Node, RigidBody, Vec3, math } from "cc";
+const { ccclass, property } = _decorator;
+
+@ccclass("GoalkeeperAI")
+export class GoalkeeperAI extends Component {
+  @property(Node) ball!: Node;
+  @property({ tooltip: "球门线Z（世界坐标）" }) goalLineZ = 10;
+  @property({ tooltip: "守门员水平活动范围X" }) rangeX = 3.5;
+  @property({ tooltip: "移动速度（m/s）" }) speed = 6;
+  @property({ tooltip: "反应延迟（秒）" }) reactDelay = 0.15;
+
+  private targetX = 0;
+  private tAcc = 0;
+  private tmp = new Vec3();
+
+  update(dt: number) {
+    if (!this.ball) return;
+
+    // 简化预测：用当前速度线性外推到球门线的交点
+    const rb = this.ball.getComponent(RigidBody);
+    if (!rb) return;
+    rb.getLinearVelocity(this.tmp);
+    const v = this.tmp.clone();
+    const bp = this.ball.worldPosition.clone();
+
+    if (Math.abs(v.z) < 0.1) return; // 几乎不朝球门方向飞
+
+    const timeToLine = (this.goalLineZ - bp.z) / v.z; // z 轴朝向球门
+    if (timeToLine < 0) return; // 已过线或背离
+
+    this.tAcc += dt;
+    if (this.tAcc >= this.reactDelay) {
+      const predictX = bp.x + v.x * timeToLine;
+      this.targetX = math.clamp(predictX, -this.rangeX, this.rangeX);
+      this.tAcc = 0; // 下次再延迟
+    }
+
+    // 移动守门员
+    const p = this.node.worldPosition;
+    const dx = this.targetX - p.x;
+    const step = math.clamp(dx, -this.speed * dt, this.speed * dt);
+    this.node.setWorldPosition(p.x + step, p.y, p.z);
+  }
+}