Using OpenGl with C

Question

Is there free OpenGL support libraries for C   If so  which one do I use and where do I find sample projects   Does C  provide classes for OpenGL

User · Answer

XNA 2 0 requires a minimum of a shader 1 1 card  While old tech  not everyone has one  Some newer laptops  in our experience Toshiba tablets with Intel graphics  have no shader 1 1 support  XNA simply wont run on these machines   This is a significant issue for us and we have shifted to Tao and OpenGL  Plus with Tao we have bindings for audio  amp  Lua support

User · Answer

I think what  korona meant was since it s just a C API  you can consume it from C  directly with a heck of a lot of typing like this    DllImport  opengl32    public static extern void glVertex3f float x  float y  float z     You unfortunately would need to do this for every single OpenGL function you call  and is basically what Tao has done for you

User · Answer

Concerning the  somewhat off topic I know but since it was brought up earlier  XNA vs OpenGL choice  it might be beneficial in several cases to go with OpenGL instead of XNA  and in other XNA instead of OpenGL        If you are going to run the applications on Linux or Mac using Mono  it might be a good choice to go with OpenGL  Also  which isn t so widely known I think  if you have customers that are going to run your applications in a Citrix environment  then DirectX Direct3D XNA won t be as economical a choice as OpenGL  The reason for this is that OpenGL applications can be co-hosted on a lesser number of servers  due to performance issues a single server cannot host an infinite number of application instances  than DirectX XNA applications which demands dedicated virtual servers to run in hardware accelerated mode  Other requirements exists like supported graphics cards etc but I will keep to the XNA vs OpenGL issue  As an IT Architect  Software developer etc this will have to be considered before choosing between OpenGL and DirectX XNA     A side note is that WebGL is based on OpenGL ES3 afaik      As a further note  these are not the only considerations  but they might make the choice easier for some

User · Answer

What would you like these support libraries to do  Just using OpenGL from C  is simple enough and does not require any additional libraries afaik

User · Answer

You can OpenGL without a wrapper and use it natively in C    Just as Jeff Mc said  you would have to import all the functions you need with DllImport   What he left out is having to create context before you can use any of the OpenGL functions  It s not hard  but there are few other not-so-intuitive DllImports that need to be done     I have created an example C  project in VS2012 with almost the bare minimum necessary to get OpenGL running on Windows box  It only paints the window blue  but it should be enough to get you started  The example can be found at http   www glinos-labs org  q programming-opengl-csharp  Look for the No Wrapper example at the bottom

User · Answer

SharpGL is a project that lets you use OpenGL in your Windows Forms or WPF applications

User · Answer

OpenTK is an improvement over the Tao API  as it uses idiomatic C  style with overloading  strongly-typed enums  exceptions  and standard  NET types  GL Begin BeginMode Points   GL Color3 Color Yellow   GL Vertex3 Vector3 Up    as opposed to Tao which merely mirrors the C API  Gl glBegin Gl GL POINTS        double  quot gl quot  prefix Gl glColor3ub 255  255  0      have to pass RGB values as separate args Gl glVertex3f 0  1  0          explicit  quot f quot  qualifier  This makes for harder porting but is incredibly nice to use  As a bonus it provides font rendering  texture loading  input handling  audio  math    Update 18th January 2016  Today the OpenTK maintainer has stepped away from the project  leaving its future uncertain  The forums are filled with spam  The maintainer recommends moving to MonoGame or SDL2   Update 30th June 2020  OpenTK has had new maintainers for a while now and has an active discord community  So the previous recommendation of using another library isn t necessarily true

User · Answer

Tao is supposed to be a nice framework   From their site      The Tao Framework for  NET is a collection of bindings to facilitate   cross-platform media application development utilizing    the  NET and Mono platforms

User · Answer

I would also recommend the Tao Framework  But one additional note   Take a look at these tutorials  http   www taumuon co uk jabuka

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