# GPU_BUFFER_USAGE_TLAS_INPUT

`import { GPU_BUFFER_USAGE_TLAS_INPUT } from "destack:gpu/binding";`

Buffer usage bit for top-level acceleration-structure input.

```ds title="GPU_BUFFER_USAGE_TLAS_INPUT"
const GPU_BUFFER_USAGE_TLAS_INPUT: GpuBufferUsage
```

[language/library/src/gpu/binding/resource.ds:100](https://github.com/destack-sh/destack/blob/main/language/library/src/gpu/binding/resource.ds#L100)