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layout: stdlib-reference
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# HitObject\.GetGeometryIndex

## Description

Returns the geometry index of a hit. Valid if the hit object represents a hit.




## Signature 

<pre>
<span class="code_keyword">uint</span> <a href="index.html" class="code_type">HitObject</a>.<a href="getgeometryindex-03b.html">GetGeometryIndex</a>();

</pre>

## Availability and Requirements

Defined for the following targets:

#### hlsl
Available in stages: `raygen`, `closesthit`, `miss`.

Requires capabilities: `hlsl_nvapi`, `ser_hlsl_native`.
#### glsl
Available in stages: `raygen`, `closesthit`, `miss`.

#### cuda
Available in stages: `raygen`, `closesthit`, `miss`.

#### spirv
Available in stages: `raygen`, `closesthit`, `miss`.

Requires capabilities: `spvRayTracingKHR`, `spvShaderInvocationReorderEXT`.