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