Graphics.DrawMeshInstanced-白红宇

Graphics.DrawMeshInstanced

阅读量：4506 次

发布时间：2019-06-08

本文共 1817 字，大约阅读时间需要 6 分钟。

Draw the same mesh multiple times using GPU instancing.

可以免去创建和管理gameObj的开销

并不是立即绘制,如需:Graphics.DrawMeshNow

每帧调用一次,当帧发送绘制请求

Meshes are not further culled by the view frustum or baked occluders, nor sorted for transparency or z efficiency.

You can only draw a maximum of 1023 instances at once

SE 3.0 以上支持

材质要勾上 enableInstancing

总的检查:material.enableInstancing && SystemInfo.supportsInstancing

过程中遇到的问题:

导入mesh,的Use File Scale 勾上就不显示??? 模型的缩放调整有问题,去掉后原本的模型直接放显得特别大

感觉像是这个函数强行用了一次file scale,再用会变得更小(函数自身*导入参数)

去掉设置,这个函数的变正常,但直接拖到游戏就不对,应该是个bug

public class GpuInstancingTest : MonoBehaviour {	public Mesh mesh;	public Material material;		List
     
       matrices = new List
      
       ();	void Start()	{		if (!material.enableInstancing || !SystemInfo.supportsInstancing)		{			enabled = false;			return;		}		for (int i = 0; i < 10; ++i)		{			Matrix4x4 mt = Matrix4x4.TRS(transform.position + (i * 1.1f) * Vector3.up, transform.rotation, Vector3.one);			matrices.Add(mt);		}	}	// Update is called once per frame	void Update () {		Graphics.DrawMeshInstanced(mesh, 0, material, matrices);	}}

             x 
public class GpuInstancingTest : MonoBehaviour {
public Mesh mesh;
public Material material;
List
                matrices = new List
                ();
void Start()
{
if (!material.enableInstancing || !SystemInfo.supportsInstancing)
{
enabled = false;
return;
}
for (int i = 0; i < 10; ++i)
{
Matrix4x4 mt = Matrix4x4.TRS(transform.position + (i * 1.1f) * Vector3.up, transform.rotation, Vector3.one);
matrices.Add(mt);
}
}
// Update is called once per frame
void Update () {
Graphics.DrawMeshInstanced(mesh, 0, material, matrices);
}
}