Unity 性能优化

一 、Drawcall 的优化

Cpu运算完了以后 需要绘制场景的时候就会调用Darwcall  

想办法降低DrawCall

二 、资源的优化

  

移动端标准

Resources 目录下保证都是用得着的

 

三 、LOD

四、遮挡剔除

 五、 光照贴图

六 mesh的合并

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

public class MeshCombiner : MonoBehaviour {

	// Use this for initialization
	void Start () {
        MeshCombine();

    }
	 private void MeshCombine()
    {
        //获取每个子物体的mesh
        MeshFilter[] filters = GetComponentsInChildren<MeshFilter>();

        //专门用来处理合并的
        CombineInstance[] combiners = new CombineInstance[filters.Length];

        for (int i = 0; i < filters.Length; i++)
        {
            combiners[i].mesh = filters[i].sharedMesh;
            combiners[i].transform = filters[i].transform.localToWorldMatrix; //获得filters[i]所在的Tranform 的矩阵
        }

        Mesh finalMesh = new Mesh(); //合并后的Mesh
        finalMesh.CombineMeshes(combiners); //合并

        GetComponent<MeshFilter>().sharedMesh = finalMesh;
    }
}

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

public class BulletPool : MonoBehaviour {
    public int poolCount = 30;
    public GameObject bulletPrefab;

    private List<GameObject> buletList = new List<GameObject>();

     
	void InitPool()
    {
        for (int i = 0; i < poolCount; i++)
        {
            GameObject go=  GameObject.Instantiate(bulletPrefab);

            buletList.Add(go);
            go.SetActive(false);
            go.transform.parent = this.transform;
        }
    }


    public GameObject GetBullet()
    {
        foreach (GameObject go in buletList)
        {
            if (go.activeInHierarchy==false)
            {
                return go;
            }

        }
        return null;
    }
}