---
name: "rtcGetGeometryUserData"
section: "3"
platform: "linux"
package: "libembree-dev"
version: "4.3.3+dfsg-1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/rtcGetGeometryUserData"
---

# rtcGetGeometryUserData(3)

### NAME

-

  ```
  rtcGetGeometryUserData - returns the user data pointer
    of the geometry
  ```

### SYNOPSIS

-

  ```
  #include <embree4/rtcore.h>
  void* rtcGetGeometryUserData(RTCGeometry geometry);
  ```

### DESCRIPTION

The `rtcGetGeometryUserData` function queries the user data pointer previously set with `rtcSetGeometryUserData`. When `rtcSetGeometryUserData` was not called yet, `NULL` is returned.

This function is supposed to be used during rendering, but only supported on the CPU and not inside SYCL kernels on the GPU. Inside a SYCL kernel the `rtcGetGeometryUserDataFromScene` function has to get used.

### EXIT STATUS

On failure an error code is set that can be queried using `rtcGetDeviceError`.

### SEE ALSO

\[rtcSetGeometryUserData\], \[rtcGetGeometryUserDataFromScene\]