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

# rtcGetGeometryTransformFromScene(3)

### NAME

-

  ```
  rtcGetGeometryTransformFromScene - returns the interpolated instance
    transformation for the specified time
  ```

### SYNOPSIS

-

  ```
  #include <embree4/rtcore.h>
  void rtcGetGeometryTransformFromScene(
    RTCScene scene,
    unsigned int geomID,
    float time,
    enum RTCFormat format,
    void* xfm
  );
  ```

### DESCRIPTION

The `rtcGetGeometryTransformFromScene` function returns the interpolated local to world transformation (`xfm` output parameter) of an instance geometry specified by its geometry ID (`geomID` parameter) of a scene (`scene` parameter) for a particular time (`time` parameter in range \[0, 1\]) in the specified format (`format` parameter).

Possible formats for the returned matrix are:

- •

  `RTC_FORMAT_FLOAT3X4_ROW_MAJOR`: The 3×4 float matrix is laid out in row-major form.

- •

  `RTC_FORMAT_FLOAT3X4_COLUMN_MAJOR`: The 3×4 float matrix is laid out in column-major form.

- •

  `RTC_FORMAT_FLOAT4X4_COLUMN_MAJOR`: The 3×4 float matrix is laid out in column-major form as a 4×4 homogeneous matrix with last row equal to (0, 0, 0, 1).

In contrast to the `rtcGetGeometryTransform` function, the `rtcGetGeometryTransformFromScene` function can get used during rendering inside a SYCL kernel.

### EXIT STATUS

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

### SEE ALSO

\[RTC\_GEOMETRY\_TYPE\_INSTANCE\], \[rtcSetGeometryTransform\], \[rtcGetGeometryTransform\]