c# - unity 霰弹枪制作

Question

所以我对随机数学的 C# 有点陌生，我学会了如何制作步枪、手枪等。但我想学习如何使用光线转换制作霰弹枪，不是射弹。对于光线转换，我厌倦了做 1 次以上的光线转换，但不知道如何让它们随机化，所以现在我只能使用 1 次光线转换。我想在拍摄时进行随机传播。这是脚本:

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class ShotGun : MonoBehaviour {
    private int pellets = 9;

    private float spreadAngle = 10f;

    private float damage = 10f;

    private float range = 1000f;

    private Camera fpsCam;

    // Use this for initialization
    void Start () 
    {
    }

    // Update is called once per frame
    void Update () 
    {
        if (Input.GetButtonDown("Fire1"))
        {
            ShotgunRay();
        }

    }

    private void ShotgunRay()
    {
        RaycastHit hit;
        if (Physics.Raycast(fpsCam.transform.position, fpsCam.transform.forward, out hit, range))
        {
            Health_Armor target = hit.transform.GetComponent<Health_Armor>();

            if (target != null)
            {
                target.TakeDamage(damage);
            }
        }
    }
}

Answer 1

多次拍摄:

int amountOfProjectiles = 8;
if (Input.GetButtonDown("Fire1"))
    {
        for(int i = 0; i < amountOfProjectiles; i++)
        {
            ShotgunRay();
        }
    }

对于随机性:

using Random = UnityEngine.Random;

Vector3 direction = fpsCam.transform.forward; // your initial aim.
Vector3 spread = Vector3.zero;
spread+= fpsCam.transform.up * Random.Range(-1f, 1f); // add random up or down (because random can get negative too)
spread+= fpsCam.transform.right * Random.Range(-1f, 1f); // add random left or right

// Using random up and right values will lead to a square spray pattern. If we normalize this vector, we'll get the spread direction, but as a circle.
// Since the radius is always 1 then (after normalization), we need another random call. 
direction += spread.normalized() * Random.Range(0f, 0.2f);

RaycastHit 命中；if (Physics.Raycast(fpsCam.transform.position, direction, out hit, range)){//等等...

要查看结果，请使用 Debug.DrawRay 和 DrawLine。我们想包括错过的镜头。 (我们画了1s，所以更容易看)

if (Physics.Raycast(fpsCam.transform.position, direction, out hit, range))
{
    Debug.DrawLine(fpsCam.transform.position, hit.point, Color.green, 1f);
}
else
{
    Debug.DrawLine(fpsCam.transform.position, fpsCam.transform.position + direction * range, Color.red, 1f);
}

DrawLine 绘制(在命中的情况下)到绿色的实际命中点。未命中的镜头以 range 的长度和红色绘制。

结果: