MerjTek.MonoGame.OpenVr.OpenGL 1.0.0

MerjTek.MonoGame.OpenVr

MerjTek.MonoGame.OpenVr is a library that works on WIndows to add OpenVR (SteamVR) abilities to a MonoGame project.

ToDo List

• Controllers
  • Update the OVRControllerProfile to include axis information forthe touchpad, joystick, and or triggers
  • Update the bits of each button in every profile once I obtain the correct information.
• DirectX
  • Solve the Rendertarget2D submission errors.

Nuget Packages

-[ MerjTek.MonoGame.OpenVr.DirectX ] v1.0.0 - Not published
- MerjTek.MonoGame.OpenVr.OpenGL v1.0.0

How To Use

After Installing the Nuget Package:

    ...
    // In Game1.cs add the using statement below:
    using MerjTek.MonoGame.OpenVr;
    ...


    ...
    // Change the Game1 base class definiton:

    // Original (From)
    public class Game1 : Game

    // Updated (To)
    public class Game1 : VrGame
    ...


    ...
    // In the Draw method
    protected override void Draw(GameTime gameTime)
    {
        // Drawing code here
        
        // NOTE: The NearPlane, FarPlane, and ViewMatrix properties must be  
        must be set anywhere before base.Draw is called.

        base.Draw(gameTime);
        
        // OPTIONAL: Render the left eye to the screen
        _spriteBatch.Begin();
        _spriteBatch.Draw(LeftEyeTarget, Vector2.Zero, Color.White);
        _spriteBatch.End();
    }
    ...


    ...
    // Add and implement DrawScene:

    /// <summary>
    /// Renders the scene for one eye. Will be called twice.
    /// </summary>
    /// <param name="eyeView">The view matrix adjusted per eye. (DO NOT MODIFY)</param>
    /// <param name="eyeProjection">The projection matrix adjusted per eye. (DO NOT MODIFY)</param>
    protected override void DrawScene(Matrix eyeView, Matrix eyeProjection)
    {
        // NOTE: Implement scene drawing code here
    }
    ...

Caveats

• The DirectX library currently does not work. Nothing appears in the VR glasses. Rendering the left eye to the screen works. Why?

  • Calling Submit on each eye's RenderTarget2D fails with a EVRCompositorError.SharedTexturedNotSupported error.
  • OpenVR documentation: (Error) SharedTexturesNotSupported (application needs to call CreateDXGIFactory1 or later before creating DX device)

Building

• No problems building in Visual Studio 2022.
• The nuget for OpenGL after building contains a dependency on Monogame.Framework.WindowsDX. I have to use the .nupkg editing tool to correct the dependency to Monogame.Framework.OpenGL.

License

The MerjTek.MonoGame.OpenVr project is under the MIT License.