/usr/include/gmsh/OctreeInternals.h is in libgmsh-dev 2.8.5+dfsg-1.1+b1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 | // Gmsh - Copyright (C) 1997-2014 C. Geuzaine, J.-F. Remacle
//
// See the LICENSE.txt file for license information. Please report all
// bugs and problems to the public mailing list <gmsh@geuz.org>.
#ifndef _OCTREE_INTERNALS_H_
#define _OCTREE_INTERNALS_H_
#include <vector>
// file of function prototypes and macro constants
typedef void (*BBFunction)(void *, double*, double*);
typedef int (*InEleFunction)(void *, double *);
typedef void (*CentroidFunction)(void *, double *);
// structure for list of elements in an octant
typedef struct elem {
void * region; // the pointer to a mesh Db region
double centroid[3]; // centroid of element bounding box inside of the octant
double minPt[3]; // corner of element bounding box nearest the origin
double maxPt[3]; // corner of elem bound box furthest from the origin
struct elem *next; // link to next item in list, NULL if end
} Elem;
typedef Elem *ELink;
// stucture for octant buckets
struct bucket {
double minPt[3]; // the point with the smallest coordinates
double maxPt[3]; // the point with the biggest coordinates
int numElements; // number of elements contained by bucket
int precision; // the level of precision of the bucket
ELink lhead; // list of elements in bucket, if NULL -> no elements
std::vector<void *> listBB; // list of elements in bucket by Bounding Box
struct bucket *next; // link to ragged digit extensions to bucket array
struct bucket *parent; // link to the parent bucket
};
typedef struct bucket octantBucket;
// structure for global information and requirment
struct global {
int numBuckets; // number of octant buckets in initial grid array
int maxElements; // max. number of elements allowed in an octant
int maxPrecision; // current maximum octant precision for model
double origin[3]; // smallest x,y, z of model's bounding box
double size[3]; // size in x, y, z of model bounding box
void * ptrToPrevElement;
std::vector<void *> listAllElements;
};
typedef struct global globalInfo;
class Octree
{
public:
globalInfo *info;
octantBucket *root;
BBFunction function_BB;
InEleFunction function_inElement;
CentroidFunction function_centroid;
};
void refineOctants(octantBucket *buckets,
globalInfo *globalPara);
int addElement2Bucket(octantBucket *bucket, void * element,
double *minBB, double *maxBB,
double *ele_centroid, globalInfo *globalPara);
int subdivideOctantBucket(octantBucket *bucket, globalInfo *globalPara);
int initializeOctantBuckets(double *orig, double *size, int maxElem,
octantBucket **buckets, globalInfo **globalPara);
int checkElementInBucket(octantBucket *bucket, void * element);
octantBucket *findElementBucket(octantBucket *buckets, double *pt);
void *searchElement(octantBucket *buckets, double *pt,
globalInfo *globalPara, BBFunction BBElement,
InEleFunction xyzInElement);
int xyzInElementBB(double *xyz, void *region, BBFunction BBElement);
void insertOneBB(void *, double *, double *, octantBucket *);
void *searchAllElements(octantBucket *_buckets_head, double *_pt,
globalInfo *_globalPara, BBFunction BBElement,
InEleFunction xyzInElement, std::vector<void *> *_elements);
#endif
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