How to download and setup 3d-opengl-demo
Open terminal and run command
                                            git clone https://github.com/AlxHnr/3d-opengl-demo.git
                                        
                                        git clone is used to create a copy or clone of 3d-opengl-demo repositories.
                                        You pass git clone a repository URL. it supports a few different network protocols and corresponding URL formats.
Also you may download zip file with 3d-opengl-demo https://github.com/AlxHnr/3d-opengl-demo/archive/master.zip
Or simply clone 3d-opengl-demo with SSH
                                            [email protected]:AlxHnr/3d-opengl-demo.git                                    
                                    If you have some problems with 3d-opengl-demo
You may open issue on 3d-opengl-demo support forum (system) here: https://github.com/AlxHnr/3d-opengl-demo/issuesSimilar to 3d-opengl-demo repositories
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