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366 lines
8.8 KiB
C++
366 lines
8.8 KiB
C++
/*+
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VIDE -- Void IDEntification pipeline -- ./c_tools/libzobov/voidTree.hpp
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Copyright (C) 2010-2013 Guilhem Lavaux
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Copyright (C) 2011-2013 Paul M. Sutter
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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+*/
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#ifndef _VOID_TREE_HPP
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#define _VOID_TREE_HPP
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#include <iostream>
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#include <stdint.h>
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#include "loadZobov.hpp"
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#include <list>
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#include <set>
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#include <vector>
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struct VoidNode
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{
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int vid;
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VoidNode *parent;
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std::list<VoidNode *> children;
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};
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struct VoidNodeOnDisk
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{
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int vid;
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int parent;
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};
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class VoidTree
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{
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protected:
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uint32_t totalNumNodes, activeNodes;
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VoidNode *nodes;
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VoidNode *rootNode;
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ZobovRep& zobov;
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public:
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typedef std::list<VoidNode *> VoidList;
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void dumpTree(std::ostream& o)
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{
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VoidNodeOnDisk data;
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o.write((char*)&activeNodes, sizeof(uint32_t));
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for (uint32_t i = 0; i < activeNodes; i++)
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{
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data.vid = nodes[i].vid;
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if (nodes[i].parent == 0)
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data.parent = -1;
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else
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data.parent = nodes[i].parent - nodes;
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o.write((char *)&data, sizeof(VoidNodeOnDisk));
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}
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}
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int lookupParent(int voidId, const std::vector<std::list<int> >& voids_for_zones)
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{
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int lastSize = 0x7fffffff;
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int goodParent = -1;
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ZobovVoid &ref_void = zobov.allVoids[voidId];
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const std::list<int>& candidateList = voids_for_zones[ref_void.zId.front()];
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std::list<int>::const_iterator iter_candidate = candidateList.begin();
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// std::cout << "candidate list size is " << candidateList.size() << std::endl;
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while (iter_candidate != candidateList.end())
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{
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int vid_candidate = *iter_candidate;
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if (vid_candidate == voidId)
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break;
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++iter_candidate;
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}
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if (iter_candidate == candidateList.end())
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{
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// std::cout << "Failure to lookup parent" << std::endl;
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return -1;
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}
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// voidId must be in the list.
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// assert(iter_candidate != candidateList.end());
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// Go back
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iter_candidate = candidateList.end();
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int vid_good_candidate = -1;
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int old_good_candidate_size = zobov.allZones.size()+1;
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do
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{
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int vid_candidate;
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--iter_candidate;
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vid_candidate = *iter_candidate;
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std::vector<int>& candidate_zIds = zobov.allVoids[vid_candidate].zId;
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if (voidId == vid_candidate)
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continue;
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if (candidate_zIds.size() < ref_void.zId.size())
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{
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continue;
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}
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int counter = 0;
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// All zones id are sorted in each void. So we just have parse the
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// vector of zones and check whether all the zones in ref_void.zId is
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// in iter_candidate->zId, the list is analyzed only once.
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// THOUGHT: candidateList may contain directly the information. It would suffice to have the void ids sorted according to volume. Then we just have to jump to the indice just smaller than voidId.
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int k = 0;
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for (int j = 0; j < candidate_zIds.size() && k < ref_void.zId.size(); j++)
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{
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if (candidate_zIds[j] == ref_void.zId[k])
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k++;
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else if (candidate_zIds[j] > ref_void.zId[k])
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break;
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}
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if (k==ref_void.zId.size())
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{
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if (candidate_zIds.size() < old_good_candidate_size)
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{
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vid_good_candidate = vid_candidate;
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old_good_candidate_size = candidate_zIds.size();
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}
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// std::cout << "Found parent " << vid_candidate << std::endl;
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// return vid_candidate;
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}
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// Go bigger, though I would say we should not to.
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}
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while (iter_candidate != candidateList.begin()) ;
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//if (vid_good_candidate < 0)
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// std::cout << "Failure to lookup parent (2)" << std::endl;
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return vid_good_candidate;
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}
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VoidTree(ZobovRep& rep, std::istream& disk)
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: zobov(rep)
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{
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totalNumNodes = rep.allVoids.size();
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disk.read((char *)&activeNodes, sizeof(uint32_t));
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nodes = new VoidNode[activeNodes];
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rootNode = 0;
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for (uint32_t i = 0; i < activeNodes; i++)
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{
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VoidNodeOnDisk data;
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disk.read((char *)&data, sizeof(data));
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nodes[i].vid = data.vid;
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if (data.parent < 0)
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{
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if (rootNode != 0)
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{
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std::cerr << "Multiple root to the tree !!!" << std::endl;
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abort();
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}
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nodes[i].parent = 0;
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rootNode = &nodes[i];
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}
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else
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{
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nodes[i].parent = nodes + data.parent;
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nodes[i].parent->children.push_back(&nodes[i]);
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}
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}
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computeMaxDepth();
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computeChildrenByNode();
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}
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VoidTree(ZobovRep& rep)
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: zobov(rep)
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{
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totalNumNodes = rep.allVoids.size();
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std::vector<std::list<int> > voids_for_zones;
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voids_for_zones.resize(rep.allZones.size());
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for (int i = 0; i < rep.allVoids.size(); i++)
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{
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ZobovVoid& v = rep.allVoids[i];
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for (int j = 0; j < v.zId.size(); j++)
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voids_for_zones[v.zId[j]].push_back(i);
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}
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// One additional for the mega-root
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nodes = new VoidNode[totalNumNodes+1];
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for (int i = 0; i <= totalNumNodes; i++)
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{
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nodes[i].vid = i;
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nodes[i].parent = 0;
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}
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std::cout << "Linking voids together..." << std::endl;
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double volMin = 0;// 4*M_PI/3*pow(4.*512/500.,3);
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int inserted = 0;
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for (int i = 0; i < rep.allVoids.size(); i++)
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{
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if (rep.allVoids[i].volume < volMin) continue;
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int p = lookupParent(i, voids_for_zones);
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if ((i % 1000) == 0) std::cout << i << std::endl;
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if (p >= 0)
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{
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nodes[p].children.push_back(&nodes[i]);
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nodes[i].parent = &nodes[p];
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}
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inserted++;
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}
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assert(inserted <= totalNumNodes);
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rootNode = &nodes[inserted];
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rootNode->vid = -1;
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rootNode->parent = 0;
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for (int i = 0; i < inserted; i++)
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if (nodes[i].parent == 0)
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{
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nodes[i].parent = rootNode;
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rootNode->children.push_back(&nodes[i]);
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}
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activeNodes = inserted+1;
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computeMaxDepth();
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computeChildrenByNode();
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}
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~VoidTree()
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{
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delete[] nodes;
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}
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int _depth_computer(VoidNode *node)
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{
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VoidList::iterator i = node->children.begin();
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int d = 0;
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while (i != node->children.end())
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{
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d = std::max(d,_depth_computer(*i));
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++i;
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}
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return d+1;
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}
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void computeMaxDepth()
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{
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std::cout << "maximum depth is " << _depth_computer(rootNode) << std::endl;
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}
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struct _children_stat {
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int num, min_num, max_num, num_zero,num_one, num_multiple;
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};
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void _children_computer(VoidNode *node, _children_stat& s)
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{
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VoidList::iterator i = node->children.begin();
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int d = 0, j = 0;
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while (i != node->children.end())
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{
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_children_computer(*i, s);
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++i;
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++j;
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}
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s.num += j;
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if (j!= 0)
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s.min_num = std::min(s.min_num, j);
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else s.num_zero ++;
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if (j==1) s.num_one++;
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if (j>1) s.num_multiple++;
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s.max_num = std::max(s.max_num, j);
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}
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void computeChildrenByNode()
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{
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_children_stat s;
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s.num = 0;
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s.min_num = activeNodes+1;
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s.max_num = s.num_zero = s.num_one =s.num_multiple= 0;
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_children_computer(rootNode, s);
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std::cout << "Average children by node " << s.num*1.0/activeNodes << " , " << s.min_num << " " << s.max_num << " " << s.num_zero << " " << s.num_one << " " << s.num_multiple << std::endl;
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}
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int getParent(int vid) const
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{
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assert(nodes[vid].parent != 0);
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return nodes[vid].parent->vid;
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}
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const VoidList& getChildren(int vid) const
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{
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return nodes[vid].children;
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}
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VoidNode *getRoot() { return rootNode; }
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template<typename T>
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void walkNode(VoidNode *node, T& traverse)
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{
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if (!traverse(node))
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return;
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VoidList::iterator i = node->children.begin();
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while (i != node->children.end())
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{
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walkNode(*i, traverse);
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++i;
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}
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}
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template<typename T>
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void walk(T& traverse)
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{
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walkNode(rootNode, traverse);
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}
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template<typename T, typename T2>
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void walkNodeWithMark(VoidNode *node, T& traverse, const T2& mark)
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{
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T2 new_mark = mark;
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if (!traverse(node, new_mark))
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return;
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VoidList::iterator i = node->children.begin();
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while (i != node->children.end())
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{
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walkNodeWithMark(*i, traverse, new_mark);
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++i;
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}
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}
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template<typename T,typename T2>
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void walkWithMark(T& traverse, T2 mark)
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{
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walkNodeWithMark(rootNode, traverse, mark);
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}
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};
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#endif
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