Unity 中大型未分段网格的运行时负载

Question

我有一个从房间的点云扫描生成的网格，根据房间的大小，顶点数有时会大于统一支持的最大值 (650,000)。

我可以将这些网格导入编辑器，Unity 会自动将它们拆分为子网格。有没有办法在运行时在脚本中访问这个例程？

Answer 1

正如您所说，网格在运行时或编辑器中不能包含超过 650,000 个顶点。

在运行时，您应该分段生成网格。例如，给定 100000 个顶点，然后创建如下网格：

// Your mesh data from the point cloud scan of a room
long[] indices = ...;
Vector3[] positions = = ...;

// Split your mesh data into two parts:
// one that have 60000 vertices and another that have 40000 vertices.

// create meshes
{
    Mesh mesh = new Mesh();
    GameObject obj = new GameObject();
    obj.AddComponent<MeshFilter>().sharedMesh = mesh;
    var positions = new Vector3[60000];
    var indices = new int[count_of_indices];//The value of count_of_indices depends on how you split the mesh data.

    // copy first 60000 vertices to positions and indices

    mesh.vertices = positions;
    mesh.triangles = indices;
}
{
    Mesh mesh = new Mesh();
    GameObject obj = new GameObject();
    obj.AddComponent<MeshFilter>().sharedMesh = mesh;
    var positions = new Vector3[4000];
    var indices = new int[count_of_indices];

    // copy the remaining 40000 vertices to positions and indices

    mesh.vertices = positions;
    mesh.triangles = indices;
}