SurfaceId 是包装用于指示表面的唯一 ID 的结构。系统通过在 Update 中执行 onSurfaceChanged 回调来提供 SurfaceId 并在完成 RequestMeshAsync 调用后将其返回。保证 SurfaceId 是唯一的,但有时,表面在同一位置会被具有其他 ID 的新表面所替换。
handle | 用于指示单一表面的实际整数 ID。 |
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