如何知道一个 GameObject 在 Unity 中是否有网格？

Question

I attached the following script to a GameObject to determine if it is a mesh.

using UnityEngine;

public class MeshCheck : MonoBehaviour
{
    // Start is called before the first frame update
    void Start()
    {
        var meshChecker = this.GetComponent<MeshRenderer>();
        if(meshChecker != null)
        {
            Debug.Log("this is mesh");
        }
        else
        {
            Debug.Log("this is not mesh");
        }
    }
}

This script seems to work fine as far as I've tried.

However, this method does not seem to be able to determine all meshes.

For example, there is a mesh with a blendShapeds.I opened and looked at the Inspector for that mesh. It seemed that the the mesh have "SkinMeshRenderer" and the mesh didn't have "MeshRenderer". And the above script output "this is not mesh".

The solution to this problem is to modify the script as follows:

using UnityEngine;

public class MeshCheck : MonoBehaviour
{
    // Start is called before the first frame update
    void Start()
    {
        var meshChecker = this.GetComponent<MeshRenderer>();
        var blendShapeChecker = this.GetComponent<SkinnedMeshRenderer>();
        if (meshChecker != null || blendShapeChecker != null)
        {
            Debug.Log("this is mesh");
        }
        else
        {
            Debug.Log("this is not mesh");
        }
    }
}

I'm wondering if the second script solves all the problems. If anyone knows how to accurately determine all meshes, please let me know.

Answer 1

You can use the Mesh Filter to avoid having all the controls via code.

In this way instead of having

if (meshChecker != null || blendShapeChecker != null || othermeshes...)

You will check

if(MeshFilter.mesh != null)

But with the Mesh Filter you can play with multiple meshes and check between all of them with theMesh.SubMeshCount or the Mesh.setIndices or even Mesh.CombineMeshes but it's all about the usage you need for the game!