ERROR: Could not initialize OpenGL / GLES library

Hi all,
I attempted several times to install Urho3D on RPi, which failed.
Finally, I reinstalled Raspbian Jessie OS.
Then reinstalled Urho3D with the following method(with RPi’s experimental OpenGL disabled, and GPU=768 MB.) :

[code]sudo apt-get update
sudo apt-get install build-essential
sudo apt-get install freeglut3 freeglut3-dev
sudo apt-get install unixodbc-dev

sudo apt-get install libevdev2

sudo apt-get install libasound2-dev
sudo apt-get install libaudio-dev
sudo apt-get install libesd0-dev
sudo apt-get install libpulse-dev
sudo apt-get install libroar-dev
sudo apt-get install libreadline6-dev

sudo apt-get install git cmake make

sudo git clone https://github.com/urho3d/Urho3D
cd Urho3D
sudo ./cmake_rpi.sh /home/pi/Urho3D
sudo make[/code]

Now after installation, when I run ./Urho3DPlayer , it gives the following error:

[Thu Oct 13 10:56:17 2016] INFO: Opened log file /home/pi/.local/share/urho3d/logs/NinjaSnowWar.as.log [Thu Oct 13 10:56:17 2016] INFO: Created 3 worker threads [Thu Oct 13 10:56:17 2016] INFO: Added resource path /home/pi/Urho3D/bin/Data/ [Thu Oct 13 10:56:17 2016] INFO: Added resource path /home/pi/Urho3D/bin/CoreData/ [Thu Oct 13 10:56:17 2016] INFO: Added resource path /home/pi/Urho3D/bin/Autoload/LargeData/ [Thu Oct 13 10:56:17 2016] ERROR: Could not create window, root cause: 'Could not initialize OpenGL / GLES library'

What is the problem !!?
How can I successfully get Urho3D to work on RPi !!!?!?!?!?

The error is telling you that OpenGL wasn’t able to initialize. I think might be because of the:

I haven’t a Rasberry Pi yet so this is a stab in the dark but now that you have Urho3D installed, try enabling the RPi’s experimental OpenGL feature and see if it starts.

Our RPI port has only be built and tested using GLES at the moment. Personally I haven’t tried it with OpenGL yet, so I have no idea whether it will work with OpenGL.

Thanks @weitjong for your reply.
But I don’t want to use OpenGL. I just want to run Urho3D ! That’s it !!
So, what is my system’s problem !?
Please help me solve this.

It is easier to verify that you have a working build environment by first test building a simple GLES project instead of using Urho3D. I did that when I first got my RPI. After you know for sure you can build a simple project then come back to retry to build Urho3D project. It has been awhile since the last time I build it natively on the board itself, to tell you the truth. I may try that later when I have time on my newer RPI 3. Usually just cross-compile on a Linux host and scp to the board for actual testing. I am not sure what went wrong with your build environment, but this is how I setup mine.

[ul][li]For cross-compiling: just follow the steps as outlined in urho3d.github.io/documentation/ … aspberryPi. The section of the text is contributed by me, so it exactly outlines what I did.[/li]
[li]For native build on the board: install the prerequisite software as root and then build Urho3D as normal user (I hope I won’t catch you using root again, I cannot stand such mistake and may opt to not respond at all and let others to help you). After calling cmake, verify the generated build tree contains this file: /Source/ThirdParty/SDL/include/generated/SDL_config.h and verify this file contains entries that indicate SDL has detected the video driver for RPI and OpenGL ES 1 and 2. If not then install the missing prerequisite package and rinse & repeat, each time deleting the previously generated build tree first when you are reusing a same build tree path.[/li][/ul]

[quote=“weitjong”]It is easier to verify that you have a working build environment by first test building a simple GLES project instead of using Urho3D. I did that when I first got my RPI. After you know for sure you can build a simple project then come back to retry to build Urho3D project. It has been awhile since the last time I build it natively on the board itself, to tell you the truth. I may try that later when I have time on my newer RPI 3. Usually just cross-compile on a Linux host and scp to the board for actual testing. I am not sure what went wrong with your build environment, but this is how I setup mine.

[ul][li]For cross-compiling: just follow the steps as outlined in urho3d.github.io/documentation/ … aspberryPi. The section of the text is contributed by me, so it exactly outlines what I did.[/li]
[li]For native build on the board: install the prerequisite software as root and then build Urho3D as normal user (I hope I won’t catch you using root again, I cannot stand such mistake and may opt to not respond at all and let others to help you). After calling cmake, verify the generated build tree contains this file: /Source/ThirdParty/SDL/include/generated/SDL_config.h and verify this file contains entries that indicate SDL has detected the video driver for RPI and OpenGL ES 1 and 2. If not then install the missing prerequisite package and rinse & repeat, each time deleting the previously generated build tree first when you are reusing a same build tree path.[/li][/ul][/quote]

Thanks @weitjong for your reply.

I solved the problem !!
First I did:

Then reinstalled Urho3D.
Now it works.

Now I have another problem(!!!) which I described here:
topic2447.html

i’ve been following this thread over the weekend and have had the same errors. removing mesa-common-dev also worked for me.

thanks for all effort.

[quote=“cnx_coder”][quote]
I solved the problem !!
First I did:

Then reinstalled Urho3D.
Now it works.
[/quote]

i’ve been following this thread over the weekend and have had the same errors. removing mesa-common-dev also worked for me.

thanks for all effort. [/quote]

It’s nice to hear that this issue is common among RPi users.
Maybe Urho3D developers can think about a workaround.

Also, I’ve faced another issue described here: topic2447.html
Do you have the same issue !!?