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rtcSetGeometryTimeStepCount(3) Embree Ray Tracing Kernels 3 rtcSetGeometryTimeStepCount(3)


rtcSetGeometryTimeStepCount - sets the number of time steps of the


#include <embree3/rtcore.h>
void rtcSetGeometryTimeStepCount(
  RTCGeometry geometry,
  unsigned int timeStepCount


The rtcSetGeometryTimeStepCount function sets the number of time steps for multi-segment motion blur (timeStepCount parameter) of the specified geometry (geometry parameter).

For triangle meshes (RTC_GEOMETRY_TYPE_TRIANGLE), quad meshes (RTC_GEOMETRY_TYPE_QUAD), curves (RTC_GEOMETRY_TYPE_CURVE), points (RTC_GEOMETRY_TYPE_POINT), and subdivision geometries (RTC_GEOMETRY_TYPE_SUBDIVISION), the number of time steps directly corresponds to the number of vertex buffer slots available (RTC_BUFFER_TYPE_VERTEX buffer type). For these geometries, one vertex buffer per time step must be specified when creating multi-segment motion blur geometries.

For instance geometries (RTC_GEOMETRY_TYPE_INSTANCE), a transformation must be specified for each time step (see rtcSetGeometryTransform).

For user geometries, the registered bounding callback function must provide a bounding box per primitive and time step, and the intersection and occlusion callback functions should properly intersect the motion-blurred geometry at the ray time.


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


[rtcNewGeometry], [rtcSetGeometryTimeRange]