Function calculate_interpolated_space

tutorials/pathtracer/pathtracer_device.cpp:1343–1354

}

AffineSpace3fa calculate_interpolated_space (ISPCInstance* instance, float gtime)
{
  if (instance->numTimeSteps == 1)
    return AffineSpace3fa(instance->spaces[0]);

  /* calculate time segment itime and fractional time ftime */
  const int time_segments = instance->numTimeSteps-1;
  const float time = gtime*(float)(time_segments);
  const int itime = clamp((int)(floor(time)),(int)0,time_segments-1);
  const float ftime = time - (float)(itime);
  return (1.0f-ftime)*AffineSpace3fa(instance->spaces[itime+0]) + ftime*AffineSpace3fa(instance->spaces[itime+1]);
}

typedef ISPCInstance* ISPCInstancePtr;