c# - 即使我检查碰撞，球体也会重叠

Question

我正在使用此代码围绕一个中心点生成多个具有不同大小和位置的球体。

有一个条件检查来防止球体重叠。

我面临的问题是，在场景中一些球体总是重叠。

=>

[Header("Galaxy")]
public int numberOfStars = 300;
public int maximumRadius = 100;
public float minDistBetweenStars = 2f;
[Header("Star")]
public float minimumSize = 1f;
public float maximumSize = 2f;

void Start()
{
    for(int i = 0; i < numberOfStars; i++)
    {
        float distance = Random.Range(0, maximumRadius);
        float angle = Random.Range(0, 2 * Mathf.PI);

        float starSize = Random.Range(minimumSize, maximumSize);
        Vector3 starPosition = new Vector3(distance * Mathf.Cos(angle), 0, distance * Mathf.Sin(angle));

        Collider[] starCollider = Physics.OverlapSphere(starPosition, (starSize * 0.5f) + minDistBetweenStars);
        if (starCollider.Length == 0)
        {
            GameObject star = GameObject.CreatePrimitive(PrimitiveType.Sphere);
            star.transform.position = starPosition;
            star.transform.localScale = new Vector3(starSize, starSize, starSize);
        }
        else
        {
            i--;
        }
    }
}

我确实传递了删除，所以一些球体被删除了，但我仍然看到很多重叠。

Answer 1

所以问题是我们没有禁用正在检查的球体上的对撞机 :P

public class StarGenSO : MonoBehaviour
{
    [Header("Galaxy")]
    public int numberOfStars = 300;
    public int maximumRadius = 100;
    public float minDistBetweenStars = 2f;
    [Header("Star")]
    public float minimumSize = 1f;
    public float maximumSize = 2f;

    void Awake()
    {
        for (int i = 0; i < numberOfStars; i++)
        {
            GameObject star = GameObject.CreatePrimitive(PrimitiveType.Sphere);

            float distance = Random.Range(0, maximumRadius);
            float angle = Random.Range(0, 2 * Mathf.PI);

            float starSize = Random.Range(minimumSize, maximumSize);
            Vector3 starPosition = new Vector3(distance * Mathf.Cos(angle), 0, distance * Mathf.Sin(angle));

            var currentCol = star.GetComponent<Collider>();
            currentCol.enabled = false;

            Collider[] starCollider = Physics.OverlapSphere(starPosition, (starSize * 0.5f) + minDistBetweenStars);
            if (starCollider.Length == 0)
            {
                star.transform.position = starPosition;
                star.transform.localScale = new Vector3(starSize, starSize, starSize);
                currentCol.enabled = true;
            }
            else
            {
                Debug.Log("remove");
                Destroy(star);
                i--;
            }
        }
    }
}

首选解决方案

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

public class StarGenSo : MonoBehaviour
{
    [Header("Galaxy")]
    public int numberOfStars = 300;
    public int maximumRadius = 100;
    public float minDistBetweenStars = 2f;
    [Header("Star")]
    public float minimumSize = 1f;
    public float maximumSize = 2f;
    [Header("Star Object")]
    public GameObject obj;

    IEnumerator Start()
    {
        for (int i = 0; i < numberOfStars; i++)
        {
            float distance = Random.Range(0, maximumRadius);
            float angle = Random.Range(0, 2 * Mathf.PI);

            float starSize = Random.Range(minimumSize, maximumSize);
            Vector3 starPosition = new Vector3(distance * Mathf.Cos(angle), 0, distance * Mathf.Sin(angle));

            Collider[] starCollider = Physics.OverlapSphere(starPosition, (starSize * 0.5f) + minDistBetweenStars);
            if (starCollider.Length == 0)
            {
                GameObject star = Instantiate(obj);
                star.transform.position = starPosition;
                star.transform.localScale = new Vector3(starSize, starSize, starSize);
                star.AddComponent<SphereCollider>();
            }
            else
            {
                i--;
            }
        }
        yield return null;
    }
}

结果: