Visualstudio2019 compilation configuration lastools-v2.0.0 under win10 system

One 、 summary

1、LAStools-v2.0.0

   For some historical reason ,LAStools The library is updated again . Last updated on ：2022 year 1 month 7 Japan .LASTools Version is ：220107. Due to some requests , Now let's use git Release the function .LASTools stay YYMMDD Version control is used in the scheme . This is for most LASTools It is very common for users , So keep this version number . Besides , We will follow the open source version git Version control guide . They may also flow into the source code later . Because we have something very similar to history , We directly from 2.0.0 edition Start .

2、 Download decompression

github link ：https://github.com/LAStools/LAStools/releases/tag/v2.0.0

Download the contents in the red box and unzip

Two 、 Source code compilation

2.1 open

Use VS2019 open lastools.dsw

Migrating solutions and projects

When the following interface appears , Just click ok .

2.2 Remove the items that failed to load

2.3 Modify the code

open LASlib The header file mydefs.hpp, Locate the 69 That's ok , Only keep #if defined(_MSC_VER), Delete or comment other code in this line .

2.4 Configuration manager

The configuration process is shown in the figure below ：

2.5 Modify the output directory

Right click LASlib— attribute — Configuration properties — routine — The output directory — It is amended as follows ：

$(SolutionDir)$(ProjectName)\$(Configuration)\

2.6 Modify the header file directory

Right click LASlib— Configuration properties —C/C++— routine — Attach include directory — Delete “…\laszip\stl”

2.7 Modify the runtime

Right click LASlib— attribute —C/C++— Code generation — Runtime — choice “ Multithreading (/MD)”.（VS2019 The default is multithreading /MTd, before ,open3d When compiling, you choose Multithreading (/MD), Therefore, multi threading is also selected here (/MD)）

2.8 Generate lib

Right click LASlib— To regenerate the . The following interface appears , be debug Mode lastools Compile successfully .

To configure release Pattern

Right click LASlib— Configuration properties —C/C++— routine — Attach include directory — Delete “…\laszip\stl”

Right click LASlib— To regenerate the . The following interface appears , be release Mode lastools Compile successfully .

2.9 lib route

...\LAStools\LAStools\LASlib\lib

3、 ... and 、 Package into Library

1. open LASlib—lib newly build Debug and Release Folder , take LASlib.lib Put in Release Folder , take LASlibD.lib Put in Debug Folder .
2. New folder LasLib, take ...\LAStools\LAStools\LASlib The next path LASlib and lib Copy the folder and put it into the new folder .
3. take ...\LAStools\LAStools\LASzip The next path src Copy the folder and put it into the new folder . Library encapsulation completed .

Four 、VS2019 Distribution Library

I am LASlib The path of is ：

D:\Open3D_0.13.0\LASlib

1. Configuration properties —C/C++— Code generation — Runtime , Multithreading (/MT), And steps 2.7 The settings are consistent .
2. VC++ Catalog — Contains the directory

D:\Open3D_0.13.0\LASlib\include
D:\Open3D_0.13.0\LASlib\src

3. VC++ Catalog — The library catalog

Release Pattern

D:\Open3D_0.13.0\LASlib\lib\Release

Debug Pattern

D:\Open3D_0.13.0\LASlib\lib\Debug

4. Additional dependency

Release Pattern

LASlib.lib

Debug Pattern

LASlibD.lib

5、 ... and 、 Test code

#include <iostream> // C++
#include "lasreader.hpp"// LasReader
#include "open3d/geometry/PointCloud.h"// Open3D  Point cloud file 
#include "open3d/visualization/utility/DrawGeometry.h" // Open3D  Visualization header file 

using namespace std;

int main(int argc, char* argv[])
{
    
	// ---------------------LASLib from las Read the point cloud in the file ---------------------------
	LASreadOpener lasreadopener;
	LASreader* lasReader = lasreadopener.open("R.las");

	if (lasReader == 0)
	{
    
		fprintf(stderr, "ERROR: could not open lasreader\n");
	}

	printf("reading %I64d points from '%s'.\n", lasReader->npoints, lasreadopener.get_file_name());

	// ------------------------Open3D Get point cloud coordinates ------------------------------
	auto cloud = std::make_shared<open3d::geometry::PointCloud>();
	int pointAmount = lasReader->npoints; // las The number of midpoint 
	cloud->points_.resize(pointAmount);
	
	int i = 0;
	while (lasReader->read_point() && i < pointAmount)
	{
    
		cloud->points_[i][0] = lasReader->point.get_X();      //  Get point cloud X coordinate 
		cloud->points_[i][1] = lasReader->point.get_Y();      //  Get point cloud Y coordinate 
		cloud->points_[i][2] = lasReader->point.get_Z();      //  Get point cloud Z coordinate 

		++i;
	}
	// ------------------------Open3D Display point cloud coordinates ------------------------------
	open3d::visualization::DrawGeometries({
     cloud }, "PointCloud", 800, 600);

	return 0;
}

6、 ... and 、 Result display

reading 595018 points from 'R.las'.