public virtual Photon store(RGBColor power, Vector3D position, Vector3D direction, Vector3D surfaceNormal)
{
storedPhotons_++;
Photon photon = new Photon();
photon.precomputedIrradiance = false;
photon.power = new RGBColor(power);
photon.position = new Vector3D(position);
photon.number = storedPhotons_;
photon.toSpherical(direction);
photon.surfaceToSpherical(surfaceNormal);
position.updateMinMax(bboxMin, bboxMax);
photons.Add(photon);
return(photon);
}