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Re: [cgal-discuss] Reading a las file.

From: Andreas Fabri <>
To:
Subject: Re: [cgal-discuss] Reading a las file.
Date: Thu, 24 Sep 2020 18:17:23 +0200
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9a23: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

As Maxime wrote: Have a look here : https://doc.cgal.org/latest/Manual/thirdparty.html#thirdpartyLASlib

On 9/24/2020 6:09 PM, Himanshu Sharma ( via cgal-discuss Mailing List) wrote:

I am using a Mac, and even compinling read_las_example.cpp fails citing
CMake Error at CMakeLists.txt:63 (include): include could not find load file:
CGAL_LASLIB_support

Are there dependencies I need to install ?
Regards Himanshu

From: on behalf of Himanshu Sharma
Sent: Thursday, September 24, 2020 11:22 AM
To:
Subject: Re: [cgal-discuss] Reading a las file.

Tried, didn't work.

Also, sorry for changing the track in between, but can you guide with the 5.1 version ?
Regards,
Himanshu

From: on behalf of Maxime Gimeno
Sent: Thursday, September 24, 2020 11:14 AM
To:
Subject: Re: [cgal-discuss] Reading a las file.

Can you try with PUBLIC instead?

Le jeu. 24 sept. 2020 à 17:11, Himanshu Sharma <> a écrit :

No particular reason. I used cgal_create_CMakeLists to generate CMakeLists.txt and that was the default.

From: <> on behalf of Maxime Gimeno <>
Sent: Thursday, September 24, 2020 11:06 AM
To: <>
Subject: Re: [cgal-discuss] Reading a las file.

Why do you link privately with CGAL ? Why not target_link_library(dsm PUBLIC CGAL) ?

Le jeu. 24 sept. 2020 à 17:00, Himanshu Sharma <> a écrit :

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.

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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-- 
Andreas Fabri, PhD
Chief Officer, GeometryFactory
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phone: +33.492.954.912    skype: andreas.fabri

Re: [cgal-discuss] Reading a las file., (continued)

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Re: [cgal-discuss] Reading a las file.