101 lines
4.4 KiB
C
101 lines
4.4 KiB
C
/**********************************************************************
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* $Id: cpl_quad_tree.h 33666 2016-03-07 05:21:07Z goatbar $
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*
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* Project: CPL - Common Portability Library
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* Purpose: Implementation of quadtree building and searching functions.
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* Derived from shapelib and mapserver implementations
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* Author: Frank Warmerdam, warmerdam@pobox.com
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* Even Rouault, <even dot rouault at mines dash paris dot org>
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*
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******************************************************************************
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* Copyright (c) 1999-2008, Frank Warmerdam
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* Copyright (c) 2008-2014, Even Rouault <even dot rouault at mines-paris dot org>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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****************************************************************************/
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#ifndef CPL_QUAD_TREE_H_INCLUDED
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#define CPL_QUAD_TREE_H_INCLUDED
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#include "cpl_port.h"
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/**
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* \file cpl_quad_tree.h
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*
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* Quad tree implementation.
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*
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* A quadtree is a tree data structure in which each internal node
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* has up to four children. Quadtrees are most often used to partition
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* a two dimensional space by recursively subdividing it into four
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* quadrants or regions
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*/
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CPL_C_START
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/* Types */
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typedef struct {
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double minx, miny, maxx, maxy;
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} CPLRectObj;
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typedef struct _CPLQuadTree CPLQuadTree;
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typedef void (*CPLQuadTreeGetBoundsFunc)(const void* hFeature, CPLRectObj* pBounds);
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typedef int (*CPLQuadTreeForeachFunc)(void* pElt, void* pUserData);
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typedef void (*CPLQuadTreeDumpFeatureFunc)(const void* hFeature, int nIndentLevel, void* pUserData);
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/* Functions */
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CPLQuadTree CPL_DLL *CPLQuadTreeCreate(const CPLRectObj* pGlobalBounds,
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CPLQuadTreeGetBoundsFunc pfnGetBounds);
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void CPL_DLL CPLQuadTreeDestroy(CPLQuadTree *hQuadtree);
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void CPL_DLL CPLQuadTreeSetBucketCapacity(CPLQuadTree *hQuadtree,
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int nBucketCapacity);
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int CPL_DLL CPLQuadTreeGetAdvisedMaxDepth(int nExpectedFeatures);
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void CPL_DLL CPLQuadTreeSetMaxDepth(CPLQuadTree *hQuadtree,
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int nMaxDepth);
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void CPL_DLL CPLQuadTreeInsert(CPLQuadTree *hQuadtree,
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void* hFeature);
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void CPL_DLL CPLQuadTreeInsertWithBounds(CPLQuadTree *hQuadtree,
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void* hFeature,
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const CPLRectObj* psBounds);
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void CPL_DLL **CPLQuadTreeSearch(const CPLQuadTree *hQuadtree,
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const CPLRectObj* pAoi,
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int* pnFeatureCount);
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void CPL_DLL CPLQuadTreeForeach(const CPLQuadTree *hQuadtree,
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CPLQuadTreeForeachFunc pfnForeach,
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void* pUserData);
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void CPL_DLL CPLQuadTreeDump(const CPLQuadTree *hQuadtree,
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CPLQuadTreeDumpFeatureFunc pfnDumpFeatureFunc,
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void* pUserData);
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void CPL_DLL CPLQuadTreeGetStats(const CPLQuadTree *hQuadtree,
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int* pnFeatureCount,
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int* pnNodeCount,
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int* pnMaxDepth,
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int* pnMaxBucketCapacity);
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CPL_C_END
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#endif
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