Mesh.MeshData.GetVertexData

Parameters

Returns

NativeArray<T> Returns a NativeArray containing the vertex buffer data.

Description

Gets raw data for a given vertex buffer stream format in the MeshData.

GetVertexData returns a direct "pointer" into the raw vertex buffer data without any memory allocations, data copies or conversions. You do not need to dispose of the returned NativeArray, because it does not represent a new memory allocation.

You need to know the exact Mesh data layout to do this: for instance, the presence and formats of all the mesh vertex attributes. The data layout matches the one from Mesh.SetVertexBufferData.

If the MeshData is writeable, and you have set the vertex buffer size and layout using Mesh.MeshData.SetVertexBufferParams, you can write vertex data directly to the array. If the MeshData is read-only, the array is read-only.

Additional resources: Mesh.AllocateWritableMeshData, Mesh.AcquireReadOnlyMeshData, Mesh.MeshData.SetVertexBufferParams.

using UnityEngine;
public class ExampleScript : MonoBehaviour
{
    struct Vertex
    {
        public Vector3 pos;
        public Vector2 uv;
    }
    void Start()
    {
        var mesh = new Mesh();
        mesh.vertices = new[] {Vector3.one, Vector3.up};
        mesh.uv = new[] {Vector2.right, Vector2.up};
        using (var data = Mesh.AcquireReadOnlyMeshData(mesh))
        {
            var verts = data[0].GetVertexData<Vertex>();
            // prints "pos (1.0, 1.0, 1.0) uv (1.0, 0.0)" and "pos (0.0, 1.0, 0.0) uv (0.0, 1.0)"
            foreach (var v in verts)
                Debug.Log($"pos {v.pos} uv {v.uv}");
        }
    }
}

Additional resources: Mesh.SetVertexBufferParams, Mesh.SetVertexBufferData, GetIndexData, Mesh.AcquireReadOnlyMeshData.