mirror of
https://github.com/qgis/QGIS.git
synced 2025-02-26 00:02:08 -05:00
83 lines
2.4 KiB
C++
83 lines
2.4 KiB
C++
|
/*****************************************************************************
|
||
|
|
* Copyright (c) 2020, Hobu, Inc. (info@hobu.co) *
|
||
|
|
* *
|
||
|
|
* All rights reserved. *
|
||
|
|
* *
|
||
|
|
* This program is free software; you can redistribute it and/or modify *
|
||
|
|
* it under the terms of the GNU General Public License as published by *
|
||
|
|
* the Free Software Foundation; either version 3 of the License, or *
|
||
|
|
* (at your option) any later version. *
|
||
|
|
* *
|
||
|
|
****************************************************************************/
|
||
|
|
|
||
|
|
#pragma once
|
||
|
|
|
||
|
|
#include "../untwine/Common.hpp"
|
||
|
|
#include "../untwine/Point.hpp"
|
||
|
|
|
||
|
|
#include "BuTypes.hpp"
|
||
|
|
#include "FileInfo.hpp"
|
||
|
|
|
||
|
|
namespace untwine
|
||
|
|
{
|
||
|
|
namespace bu
|
||
|
|
{
|
||
|
|
|
||
|
|
class PointAccessor
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
PointAccessor(const BaseInfo& b) : m_b(b)
|
||
|
|
{}
|
||
|
|
|
||
|
|
~PointAccessor()
|
||
|
|
{
|
||
|
|
for (FileInfo *fi : m_fileInfos)
|
||
|
|
pdal::FileUtils::unmapFile(fi->context());
|
||
|
|
}
|
||
|
|
|
||
|
|
void read(FileInfo& fi)
|
||
|
|
{
|
||
|
|
using namespace pdal::FileUtils;
|
||
|
|
|
||
|
|
std::string filename = m_b.inputDir + "/" + fi.filename();
|
||
|
|
auto ctx = mapFile(filename, true, 0, fi.numPoints() * m_b.pointSize);
|
||
|
|
if (ctx.m_addr == nullptr)
|
||
|
|
fatal(filename + ": " + ctx.m_error);
|
||
|
|
fi.setContext(ctx);
|
||
|
|
fi.setStart(size());
|
||
|
|
m_fileInfos.push_back(&fi);
|
||
|
|
}
|
||
|
|
|
||
|
|
Point operator[](size_t offset)
|
||
|
|
{
|
||
|
|
for (FileInfo *fi : m_fileInfos)
|
||
|
|
if (offset >= (size_t)fi->start() &&
|
||
|
|
offset < (size_t)fi->start() + fi->numPoints())
|
||
|
|
return Point(fi->address() + ((offset - fi->start()) * m_b.pointSize));
|
||
|
|
return Point();
|
||
|
|
}
|
||
|
|
|
||
|
|
size_t size()
|
||
|
|
{
|
||
|
|
if (m_fileInfos.empty())
|
||
|
|
return 0;
|
||
|
|
else
|
||
|
|
return m_fileInfos.back()->start() + m_fileInfos.back()->numPoints();
|
||
|
|
}
|
||
|
|
|
||
|
|
void dump()
|
||
|
|
{
|
||
|
|
std::cerr << "Accessor infos:\n";
|
||
|
|
for (FileInfo *fi : m_fileInfos)
|
||
|
|
std::cerr << fi->filename() << "/" << fi->start() << "/" << fi->numPoints() << "!\n";
|
||
|
|
std::cerr << "\n";
|
||
|
|
}
|
||
|
|
|
||
|
|
private:
|
||
|
|
const BaseInfo& m_b;
|
||
|
|
std::vector<FileInfo *> m_fileInfos;
|
||
|
|
};
|
||
|
|
|
||
|
|
} // namespace bu
|
||
|
|
} // namespace untwine
|