Ubuntu18.04 vtk version6.3 but remove vtkRenderingFreeTypeOpenGL

[MikoyChinese]

Hi, Today I build it on my PC, which is Ubuntu18.04 with pcl1.8 and vtk6.3. And got a error about /usr/bin/ld: cannot find -lvtkRenderingFreeTypeOpenGL, and When I search it from google, I found that the vtkRenderingFreeTypeOpenGL was remove from vtk6.3 while vtk6.2 is still. So can you tell me how do you build it on Ubuntu18.04, and what packets you have installed?

Thanks, Mikoy Chinese

[lesterlo]

Did you install libvtk6-qt-dev? Just a quick possible solution I just through.

I following this build_guide to build the PCL 1.9.1 and PointCloud Labeller. I haven't encountered this type of error

[MikoyChinese]

Reply:

Yes, I do. My PC was ubuntu18.04:

• For Qt5: I build it from office website.
• For vtk6: install by apt install libvtk6-dev(it will also install libvtk6-qt-dev) version: 6.3
• For pcl1.8: install by apt install libpcl-dev(version: 1.8.1)

Issues:

• And you should change 17 to 11 for support c++11 2011 standard.

https://github.com/lesterlo/PointCloud-Object-Labeller/blob/35e6fdaa517372382b86080488939e7b8918933d/CMakeLists.txt#L8

• Sencondly, when I use ubuntu16.04 to install qt5 by apt install qt5-default, it can't work. So I try to install QT5 from offical website. Because the Qt installer default path is /opt/Qt5.9.6/, when it done, you need to export LD_LIBRARY_PATH include /opt/Qt5.9.6/5.9.6/gcc_64/lib to build it. And if you get error about can't find the correct QT version, you should specify the qt dir to CMakeLists.txt like following:

#For QT auto gen
set(CMAKE_AUTOMOC ON) # For meta object compiler
set(CMAKE_AUTORCC ON) # Resource files
set(CMAKE_AUTOUIC ON) # UI files

set(CMAKE_INCLUDE_CURRENT_DIR ON)
set(CMAKE_PREFIX_PATH ${CMAKE_PREFIX_PATH} /opt/Qt5.9.6/5.9.6/gcc_64/lib/cmake)

[lesterlo]

Since I am using qt, vtk from apt package manager, I don't know what happens when the program compiles with the libraries from other sources. Please follow this guide to install all of the libraries I recommended. I tested the program through this configuration.

The program is targeted on PCL version 1.9.1. This version of PCL requires the compiler compatible with >= C++ 14. Maybe you can change it to c++ 14 on this line to see whether this can solve your problem. https://github.com/lesterlo/PointCloud-Object-Labeller/blob/35e6fdaa517372382b86080488939e7b8918933d/CMakeLists.txt#L8

The g++ compiler in Ubuntu 18.04 should compatible with c++17.

About the second question. Since the default ld path doesn't include /opt/*. You need to manually include it on the cmake when you install the library at non-default location.

Hope this message can solve your problem.

[MikoyChinese]

Thx, I will try it again.