Space3d
    
            
                
                    C# graphics library used for 3D modeling, built with OpenGL/OpenTK
                
            
             
            
             
            
        
            ..., it provides a control over a lifetime of the object cluster; second, it mirrors a subordination of the object coordinate systems. 
All the project libraries are built with Visual Studio, .NET Framework 4.7.1. The Graphics.sln and Space3d.sln solutions contain test applications, called UnitTest, featuring the library capabilities.