Initial commit

2025-12-10 17:47:15 +08:00
commit 94fb922f1f
50 changed files with 1059 additions and 0 deletions
--- a/js/npc/enemy.js
+++ b/js/npc/enemy.js
@@ -0,0 +1,100 @@
+import Animation from '../base/animation';
+import { SCREEN_WIDTH, SCREEN_HEIGHT } from '../render';
+
+const ENEMY_IMG_SRC = 'images/enemy.png';
+const ENEMY_WIDTH = 60;
+const ENEMY_HEIGHT = 60;
+const EXPLO_IMG_PREFIX = 'images/explosion';
+
+export default class Enemy extends Animation {
+  speed = Math.random() * 2 + 1; // 飞行速度
+
+  constructor() {
+    super(ENEMY_IMG_SRC, ENEMY_WIDTH, ENEMY_HEIGHT);
+  }
+
+  init(speed) {
+    this.x = 0;
+    this.y = 0;
+
+    // 随机选择一个边生成 (0:上, 1:右, 2:下, 3:左)
+    const side = Math.floor(Math.random() * 4);
+
+    switch (side) {
+      case 0: // Top
+        this.x = Math.random() * (SCREEN_WIDTH - this.width);
+        this.y = -this.height;
+        break;
+      case 1: // Right
+        this.x = SCREEN_WIDTH;
+        this.y = Math.random() * (SCREEN_HEIGHT - this.height);
+        break;
+      case 2: // Bottom
+        this.x = Math.random() * (SCREEN_WIDTH - this.width);
+        this.y = SCREEN_HEIGHT;
+        break;
+      case 3: // Left
+        this.x = -this.width;
+        this.y = Math.random() * (SCREEN_HEIGHT - this.height);
+        break;
+    }
+
+    // 计算朝向中心的速度向量
+    const targetX = SCREEN_WIDTH / 2 - this.width / 2;
+    const targetY = SCREEN_HEIGHT / 2 - this.height / 2;
+
+    const dx = targetX - this.x;
+    const dy = targetY - this.y;
+    const distance = Math.sqrt(dx * dx + dy * dy);
+
+    this.speed = speed || (Math.random() * 2 + 2); // 默认速度
+
+    this.vx = (dx / distance) * this.speed;
+    this.vy = (dy / distance) * this.speed;
+
+    this.isActive = true;
+    this.visible = true;
+    // 设置爆炸动画
+    this.initExplosionAnimation();
+  }
+
+  // 预定义爆炸的帧动画
+  initExplosionAnimation() {
+    const EXPLO_FRAME_COUNT = 19;
+    const frames = Array.from(
+      { length: EXPLO_FRAME_COUNT },
+      (_, i) => `${EXPLO_IMG_PREFIX}${i + 1}.png`
+    );
+    this.initFrames(frames);
+  }
+
+  // 每一帧更新敌人位置
+  update() {
+    if (GameGlobal.databus.isGameOver) {
+      return;
+    }
+
+    this.x += this.vx;
+    this.y += this.vy;
+
+    // 如果到达中心（或者非常接近），可以视为撞击玩家（碰撞检测会处理）
+    // 这里不需要额外的边界回收逻辑，因为它们最终会撞上玩家或被消灭
+  }
+
+  destroy() {
+    this.isActive = false;
+    // 播放销毁动画后移除
+    this.playAnimation();
+    GameGlobal.musicManager.playExplosion(); // 播放爆炸音效
+    wx.vibrateShort({
+      type: 'light'
+    }); // 轻微震动
+    this.on('stopAnimation', () => this.remove.bind(this));
+  }
+
+  remove() {
+    this.isActive = false;
+    this.visible = false;
+    GameGlobal.databus.removeEnemy(this);
+  }
+}