rtcGetGeometryTransform(3) Embree Ray Tracing Kernels 4 rtcGetGeometryTransform(3) 

rtcGetGeometryTransform - returns the interpolated instance
  transformation for the specified time


#include <embree4/rtcore.h>
void rtcGetGeometryTransform(
  RTCGeometry geometry,
  float time,
  enum RTCFormat format,
  void* xfm
);

The rtcGetGeometryTransform function returns the interpolated local to world transformation (xfm parameter) of an instance geometry (geometry 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).

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 rtcGetGeometryTransformFromScene function has to get used.

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

[RTC_GEOMETRY_TYPE_INSTANCE], [rtcSetGeometryTransform], [rtcGetGeometryTransformFromScene]