Unity中实现愤怒的小鸟蓝鸟分裂功能时如何为克隆体赋予同向速度

实现方案 #

你的思路是正确的，只需要提前缓存本体的飞行速度，实例化克隆体后直接给克隆体的刚体组件赋值相同速度，最后销毁本体即可。修改后的完整代码如下：

_spawnpoint1edit.Set(0,+2,0);
_spawnpoint2edit.Set(0,0,0);
_spawnpoint3edit.Set(0,-2,0);

if (Input.GetKeyDown(KeyCode.Space) && 
    GetComponent<Rigidbody2D>().velocity.magnitude > 2 && 
    _activated == false)
{
    _activated = true;
    Debug.Log("Ability Activated");

    // 缓存本体的速度，避免重复读取组件
    Rigidbody2D mainRb = GetComponent<Rigidbody2D>();
    Vector2 flyVelocity = mainRb.velocity;

    _spawnpoint1 = transform.position + _spawnpoint1edit;
    _spawnpoint2 = transform.position + _spawnpoint2edit;
    _spawnpoint3 = transform.position + _spawnpoint3edit;

    var clone1 = Instantiate (_prefab1, _spawnpoint1 , Quaternion.identity);
    var clone2 = Instantiate (_prefab2, _spawnpoint2 , Quaternion.identity);
    var clone3 = Instantiate (_prefab3, _spawnpoint3 , Quaternion.identity);

    // 给克隆体赋值和本体完全一致的速度
    clone1.GetComponent<Rigidbody2D>().velocity = flyVelocity;
    clone2.GetComponent<Rigidbody2D>().velocity = flyVelocity;
    clone3.GetComponent<Rigidbody2D>().velocity = flyVelocity;

    // 可选：防止克隆体重复触发分裂技能，尖括号内替换为你挂载在鸟上的脚本类名
    // clone1.GetComponent<BirdController>()._activated = true;
    // clone2.GetComponent<BirdController>()._activated = true;
    // clone3.GetComponent<BirdController>()._activated = true;

    // 销毁本体对象
    Destroy(gameObject);
}

注意事项 #

• 请确保_prefab1、_prefab2、_prefab3三个预制体都已挂载Rigidbody2D组件，否则会出现空引用报错
• 如果三个克隆体参数完全一致，可复用同一个预制体变量，无需定义三个不同的prefab
• 如果你需要克隆体和本体的旋转角度保持一致，可将Instantiate的第三个参数从Quaternion.identity替换为transform.rotation

内容的提问来源于stack exchange，提问作者Mohamad Moheb