rtcSetGeometryUserPrimitiveCount - sets the number of primitives of a user-defined geometry
#include <embree3/rtcore.h> void rtcSetGeometryUserPrimitiveCount( RTCGeometry geometry, unsigned int userPrimitiveCount );
The rtcSetGeometryUserPrimitiveCount function sets the number of user-defined primitives (userPrimitiveCount parameter) of the specified user-defined geometry (geometry parameter).
On failure an error code is set that can be queried using rtcGetDeviceError.
[RTC_GEOMETRY_TYPE_USER]