---
layout: stdlib-reference
---

# GetClusterID

## Description





## Signature 

<pre>
<span class="code_keyword">int</span> <a href="getclusterid-03ab.html">GetClusterID</a>();

</pre>

## Availability and Requirements

Defined for the following targets:

#### hlsl
Available in stages: `closesthit`, `anyhit`.

#### glsl
Available in stages: `closesthit`, `anyhit`.

#### cuda
Available in stages: `closesthit`, `anyhit`.

#### spirv
Available in stages: `closesthit`, `anyhit`.

Requires capability: `spvRayTracingKHR`.