feat: 为英雄和怪物添加下落入场动画

- 在 MissionHeroComp 和 MissionMonComp 中定义下落高度常量
- 修改英雄和怪物的加载方法，接受目标落地高度参数
- 使用 Tween 实现平滑下落动画，下落距离越大持续时间越长
- 下落期间禁用移动和碰撞器，落地后恢复
- 为怪物添加随机下落高度偏移，减轻重叠感

assets/script/game/map/MissionHeroComp.ts

@@ -13,6 +13,7 @@ const { ccclass, property } = _decorator;
 @ccclass('MissionHeroCompComp')
 @ecs.register('MissionHeroComp', false)
 export class MissionHeroCompComp extends CCComp {
+    private static readonly HERO_DROP_HEIGHT = 260
     timer:Timer=new Timer(2)
     Friend_is_dead:boolean=false
     current_hero_uuid:number=0
@@ -59,8 +60,9 @@ export class MissionHeroCompComp extends CCComp {
         let hero_pos=0
         let hero = ecs.getEntity<Hero>(Hero);
         let scale = 1
-        let pos:Vec3 = HeroPos[hero_pos].pos;
-        hero.load(pos,scale,uuid);
+        let landingPos:Vec3 = HeroPos[hero_pos].pos;
+        let spawnPos:Vec3 = v3(landingPos.x, landingPos.y + MissionHeroCompComp.HERO_DROP_HEIGHT, 0);
+        hero.load(spawnPos,scale,uuid,landingPos.y);
     }
 
 
@@ -70,4 +72,4 @@ export class MissionHeroCompComp extends CCComp {
     reset() {
         // this.node.destroy();
     }
-}
+}

assets/script/game/map/MissionMonComp.ts

@@ -17,6 +17,7 @@ const { ccclass, property } = _decorator;
 @ecs.register('MissionMonComp', false)
 export class MissionMonCompComp extends CCComp {
     private static readonly BOSS_RENDER_PRIORITY = 1000000;
+    private static readonly MON_DROP_HEIGHT = 300;
     @property({ tooltip: "是否启用调试日志" })
     private debugMode: boolean = false;
     
@@ -195,11 +196,13 @@ export class MissionMonCompComp extends CCComp {
         let mon = ecs.getEntity<Monster>(Monster);
         let scale = -1;
         // 按生成序号做横向错列，减轻重叠感
-        let pos: Vec3 = v3(MonStart.START_X, BoxSet.GAME_LINE, 0);
+        const landingY = BoxSet.GAME_LINE + (isBoss ? 6 : 0);
+        const dropOffset = MissionMonCompComp.MON_DROP_HEIGHT + Math.floor(Math.random() * 40);
+        let pos: Vec3 = v3(MonStart.START_X, landingY + dropOffset, 0);
         // 递增全局生成顺序，做溢出保护
         this.globalSpawnOrder = (this.globalSpawnOrder + 1) % 999; 
         
-        mon.load(pos, scale, uuid, isBoss);
+        mon.load(pos, scale, uuid, isBoss, landingY);
         const move = mon.get(MoveComp);
         if (move) {
             move.spawnOrder = isBoss