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154 lines
2.6 KiB
C++
154 lines
2.6 KiB
C++
#include "stdafx.h"
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#include "pointsubset.h"
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#include <fstream>
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#include <string>
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#include <sstream>
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#include <list>
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#include <algorithm>
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#include <set>
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#include "simplegrid.h"
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using namespace std;
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CPointSubset::CPointSubset(void)
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:m_xmax(0.0)
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, m_xmin(.0)
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,m_ymin(.0)
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,m_ymax(.0)
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{
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}
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CPointSubset::~CPointSubset(void)
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{
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}
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int CPointSubset::ReadPoints(CString strXyz)
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{
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m_points.clear();
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ifstream ifs(strXyz, fstream::in);
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if (!ifs)
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return 0;
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CString str;
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string line;
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stringstream sstr;
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size_t idx = 0;
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string name;
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CPointXYZ xyz;
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while (getline(ifs, line))
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{
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if (line.size() < 5)
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continue;
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idx = line.find("3dPoint");
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if (idx != std::string::npos)
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{
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line = line.substr(idx + 7);
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}
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replace(line.begin(), line.end(), ',', ' ');
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sstr.clear();
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sstr.str(line);
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sstr >> xyz.x0 >> xyz.y0 >> xyz.z0;
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m_points.push_back(xyz);
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}
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GetExtremeValues();
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return (int)m_points.size();
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}
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void CPointSubset::GetExtremeValues(void) //»ñÈ¡É¢µã¼«Öµ
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{
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if (m_points.size() < 1)
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return;
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m_xmin = m_xmax = m_points[0].x0;
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m_ymin = m_ymax = m_points[0].y0;
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for (auto& p : m_points)
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{
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m_xmin = min(m_xmin, p.x0);
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m_xmax = max(m_xmax, p.x0);
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m_ymin = min(m_ymin, p.y0);
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m_ymax = max(m_ymax, p.y0);
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}
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}
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int CPointSubset::ReadPoints(std::vector<CPointXYZ>& vecXyz)
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{
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m_points.assign(vecXyz.begin(), vecXyz.end());
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GetExtremeValues();
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return (int)m_points.size();
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}
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int CPointSubset::CreateSubsetWithMinDist(float fMinDist, std::vector<int>& idxReserved,
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std::vector<int>* idxRemoved)
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{
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if(fMinDist <= 0.000001)
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return 0;
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int xnum = ceil((m_xmax - m_xmin) / fMinDist) + 1;
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int ynum = ceil((m_ymax - m_ymin) / fMinDist) + 1;
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CSimpleGrid grd;
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grd.Create(m_xmin, m_ymin, fMinDist, fMinDist,xnum, ynum);
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////begin test
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//grd.WriteGridLines("d:/testgrd.dfd");
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////end test
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grd.ReadPoints(m_points);
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grd.SimplifyNodePointsArray();
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list<int> dstlst;
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grd.GetAllNodePointIndexes(dstlst);
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idxReserved.assign(dstlst.begin(), dstlst.end());
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if (idxRemoved)
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{
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set<int> rsvset;
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for (auto p : dstlst)
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rsvset.insert(p);
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idxRemoved->reserve(m_points.size() - rsvset.size());
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for (int i = 0; i < m_points.size(); i++)
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{
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if (rsvset.count(i) < 1)
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idxRemoved->push_back(i);
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}
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}
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return -1;
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}
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//ÓɵãÐòºÅд³öµã¼¯µ½Îļþ
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int CPointSubset::WritePoints(CString fname, std::vector<int>& idxReserved)
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{
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FILE* fw = fopen(fname, "w");
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if (nullptr == fw)
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return 0;
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for (auto idx : idxReserved)
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fprintf(fw, "%.12g,%.12g,%g\n", m_points[idx].x0,
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m_points[idx].y0, m_points[idx].z0);
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fclose(fw);
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return (int)idxReserved.size();
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} |