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RadiancePmap/pmapooc.h
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pmapooc.h
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/*
==================================================================
Photon map interface to out-of-core octree
Roland Schregle (roland.schregle@{hslu.ch, gmail.com})
(c) Lucerne University of Applied Sciences and Arts,
supported by the Swiss National Science Foundation (SNSF, #147053)
==================================================================
$Id: pmapooc.h,v 1.2 2020/04/08 15:14:21 rschregle Exp $
*/
#ifndef PMAPOOC_H
#define PMAPOOC_H
#include "oocnn.h"
/* Suffixes for octree filenames */
/* #define PMAP_OOC_NODESUFFIX ".node"
#define PMAP_OOC_HEAPSUFFIX ".heap" */
#define PMAP_OOC_LEAFSUFFIX ".leaf"
/* Out-of-core octree constants */
#define PMAP_OOC_NUMBLK 32 /* Num blocks for external sort */
#define PMAP_OOC_BLKSIZE 1e8 /* Block size for external sort */
#define PMAP_OOC_LEAFMAX (OOC_OCTCNT_MAX) /* Max photons per leaf */
#define PMAP_OOC_MAXDEPTH (OOC_MORTON_BITS) /* Max octree depth */
typedef OOC_SearchQueueNode PhotonSearchQueueNode;
typedef OOC_SearchQueue PhotonSearchQueue;
typedef OOC_Octree PhotonStorage;
typedef unsigned PhotonIdx;
/* Forward declarations to break dependency loop with pmapdata.h */
struct PhotonMap;
void OOC_BuildPhotonMap (struct PhotonMap *pmap, unsigned numProc);
/* Build out-of-core octree pmap -> store from photons in unsorted
* heapfile pmap -> heap and generate nodes and leaf file with prefix
* pmap -> fileName. Photon map construction may be parallelised if
* numProc > 1, if supported. The heap is destroyed on return. */
int OOC_SavePhotons (const struct PhotonMap *pmap, FILE *out);
/* Save photons in out-of-core octree to file. Return -1 on error,
* else 0 */
int OOC_LoadPhotons (struct PhotonMap *pmap, FILE *in);
/* Load photons in out-of-core octree from file. Return -1 on error,
* else 0 */
void OOC_InitFindPhotons (struct PhotonMap *pmap);
/* Initialise NN search queue prior to calling kdT_FindPhotons() */
int OOC_FindPhotons (struct PhotonMap* pmap, const FVECT pos,
const FVECT norm);
/* Locate pmap -> squeue.len nearest photons to pos with similar normal
* (NULL for volume photons) and return in search queue pmap -> squeue,
* starting with the further photon at pmap -> squeue.node. Return -1
* if none found, else 0. */
int OOC_Find1Photon (struct PhotonMap* pmap, const FVECT pos,
const FVECT norm, Photon *photon);
/* Locate single nearest photon to pos with similar normal. Return -1
* if none found, else 0. */
int OOC_GetPhoton (struct PhotonMap *pmap, PhotonIdx idx,
Photon *photon);
/* Retrieve photon referenced by idx from leaf file and return -1 on
* error, else 0. */
Photon *OOC_GetNearestPhoton (const PhotonSearchQueue *squeue,
PhotonIdx idx);
/* Retrieve photon from NN search queue after OOC_FindPhotons() */
PhotonIdx OOC_FirstPhoton (const struct PhotonMap* pmap);
/* Return index to first photon in octree */
#endif
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