RadiancePmap/pmaptkdt.h
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pmaptkdt.h
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			/*
			======================================================================
			In-core kd-tree for 4D TRANSIENT photon map. Based on pmapkdt.h with
			extensions to handle photon path length (representing time of flight).

			Roland Schregle (roland.schregle@{hslu.ch, gmail.com})
			(c) Tokyo University of Science,
			supported by the JSPS Grants-in-Aid for Scientific Research
			(KAKENHI JP19KK0115, "Three-Dimensional Light Flow")
			======================================================================

			$Id$
			*/


			#ifndef PMAPTKDT_H
			#define PMAPTKDT_H

			#include "pmapkdt.h"

			int kdT_TransFindPhotons (struct PhotonMap* pmap, const FVECT pos,
			const FVECT norm
			);
			/* Locate pmap -> squeue.len nearest photons to pos with similar normal
			* (ignored if NULL) at time pmap->time for speed of light pmap->velocity.
			* Return nearest photons in search queue pmap->squeue, starting with the
			* furthest photon at pmap -> squeue.node.
			* Return value = -1 if none found, else 0. */

			int kdT_TransFind1Photon (struct PhotonMap* pmap, const FVECT pos,
			const FVECT norm, Photon *photon
			);
			/* Locate single nearest photon to pos with similar normal at time
			* pmap->time for speed of light pmap->velocity.
			* Return value = -1 if none found, else 0. */
			#endif