Pencil.Gaming is a gaming library for C#, providing support for OpenGL, GLFW and OpenAL. It's a stable, cross-platform, open-source (some prefer the term "free") alternative to libraries like XNA, which has pretty much died now, OpenTK, which hasn't been updated for about a year, and SharpDX, which is not cross-platform. A feature that Pencil.Gaming has over most other C# gaming libraries, is that users do not need to install any redistributables!

The OpenGL implementation is based on the OpenTK source code.

A quick overview of the samples:

• [OpenAL utilities] (https://github.com/antonijn/Pencil.Gaming#sample-usage-openal)
• [OpenGL utilities] (https://github.com/antonijn/Pencil.Gaming#sample-usage-glutils)

This section has been removed. Please refer to the [wiki] (https://github.com/antonijn/Pencil.Gaming/wiki) for GLFW2/3 examples.

Apart from implementing GLFW, Pencil.Gaming also has a few utilities to make your life bearable. On of the more notable of these is the Al.Utils.BufferFromWav utility, which is able to load wave files into an OpenAL buffer.

uint buffer = Al.Utils.BufferFromWav("MyWaveFile.wav");
uint source;
Al.GenSources(1, out source);

Al.Source(source, AlSourcei.Buffer, (int) buffer);
Al.Source(source, AlSourceb.Looping, true);

Al.SourcePlay(source);

// ...
// ...

// When cleaning up:
Al.DeleteSources(1, ref source);
Al.DeleteBuffers(1, ref buffer);

Gl.Utils is another utility class provided by Pencil.Gaming. It provides support for cross-platform texture loading, and will feature a model loading utility (obj files only).

This is how you use the image loading utility:

int image = Gl.Utils.LoadImage("myfile.png"); // Works with multiple file formats
Gl.BindTexture(TextureTarget.Texture2D, image);

Gl.Begin(BeginMode.TriangleStrip);
  Gl.TexCoord2(0f, 1f);
  Gl.Vertex2(0.1f, 0.9f);
  Gl.TexCoord2(0f, 0f);
  Gl.Vertex2(0.1f, 0.1f);
  Gl.TexCoord2(1f, 1f);
  Gl.Vertex2(0.9f, 0.9f);
  Gl.TexCoord2(1f, 0f);
  Gl.Vertex2(0.9f, 0.1f);
Gl.End();