CGAL users discussion list

[Himanshu Sharma <>]

Yes, I did that.

I also tried with CGAL 5.1 just now. I am attaching the CMakeLists.txt for 5.1. For this, it is unable to find CGAL_LASLIB_support. Can you help with this as well

include could not find load file:

    CGAL_LASLIB_support

---

From: <> on behalf of Maxime Gimeno <>
Sent: Thursday, September 24, 2020 10:50 AM
To: <>
Subject: Re: [cgal-discuss] Reading a las file.

 

Did you include <CGAL/IO/read_las_points.h> ?

Le jeu. 24 sept. 2020 à 16:44, Himanshu Sharma <> a écrit :

Sorry, I am using 5.0 i meant.

---

From: Himanshu Sharma <>
Sent: Thursday, September 24, 2020 10:44 AM
To: <>
Subject: Re: [cgal-discuss] Reading a las file.

 

I am using 5.1

It is NOTICE : the LAS reader found.

Regards,
Himanshu

---

From: <> on behalf of Maxime Gimeno <>
Sent: Thursday, September 24, 2020 10:21 AM
To: <>
Subject: Re: [cgal-discuss] Reading a las file.

 

Actually it depends on your version of CGAL. <5.1, your code is probably right, if LASLIB_FOUND is TRUE. What is your CMAKE output during configuration ?

NOTICE : the LAS reader found.

or

NOTICE : the LAS reader test requires LASlib and will not be compiled.

?

Le jeu. 24 sept. 2020 à 16:11, Himanshu Sharma <> a écrit :

I see. I have attached the CMakeLists.txt along.

I tried to follow CMakeLists.txt of read_las_example from Point_set_processing_3, but didnt get it right it seems.

Regards

Himanshu

---

From: <> on behalf of Maxime Gimeno <>
Sent: Thursday, September 24, 2020 2:13 AM
To: <>
Subject: Re: [cgal-discuss] Reading a las file.

 

Hello,

It looks like you did not link with LAS. Can you provide your CMakeLists.txt ? You must have forgotten to link with the target CGAL::LASLIB_support. Have a look here : https://doc.cgal.org/latest/Manual/thirdparty.html#thirdpartyLASlib

Le jeu. 24 sept. 2020 à 05:27, Himanshu Sharma <> a écrit :

Hello,

I am trying to read a .las file into Point_set_3. Below is the code snippent. However this throws following error:

error: no matching function for call to 'make_las_point_reader.

I am not sure what goes wrong here. I understand that the argument to the make_las_point_reader is not of the right type.

 

std::ifstream ifile (argv[1], std::ios_base::binary);

  CGAL::Point_set_3<Point_3> points;

  if (!CGAL::read_las_points

      (ifile,

       points.index_back_inserter(),

       CGAL::make_las_point_reader(points.point_map())))

    {

      std::cerr << "Error: cannot read file " << argv[1] << std::endl;

      return EXIT_FAILURE;

    }

Regards

Himanshu

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# Created by the script cgal_create_CMakeLists
# This is the CMake script for compiling a set of CGAL applications.

cmake_minimum_required(VERSION 3.1...3.15)

project( dsm )


# CGAL and its components
find_package( CGAL QUIET COMPONENTS  )

if ( NOT CGAL_FOUND )

  message(STATUS "This project requires the CGAL library, and will not be 
compiled.")
  return()  

endif()


# Boost and its components
find_package( Boost REQUIRED )

if ( NOT Boost_FOUND )

  message(STATUS "This project requires the Boost library, and will not be 
compiled.")

  return()  

endif()

find_package(LASLIB)
  include(CGAL_LASLIB_support)
  if (TARGET CGAL::LASLIB_support)
    add_executable( dsm "dsm.cpp" )
  else()
    message(STATUS "NOTICE : the LAS reader test requires LASlib and will not 
be compiled.")
  endif()

# include for local directory

# include for local package


# Creating entries for target: dsm
# ############################

add_executable( dsm  dsm.cpp )

add_to_cached_list( CGAL_EXECUTABLE_TARGETS dsm )

# Link the executable to CGAL and third-party libraries
target_link_libraries(dsm PRIVATE CGAL::CGAL )
target_link_libraries(dsm ${CGAL_libs} CGAL::LASLIB_support)