public void Clear(ClearOptions options, Vector4 color, float depth, int stencil) { if (openGLESVersion == GLContextVersion.Gles2_0) { GL20.ClearColor(color.X, color.Y, color.Z, color.W); GL20.ClearDepth(depth); GL20.ClearStencil(stencil); GL20.Clear((uint)(All20.ColorBufferBit | All20.DepthBufferBit | All20.StencilBufferBit)); } else { GL11.ClearColor(color.X, color.Y, color.Z, color.W); GL11.ClearDepth(depth); GL11.ClearStencil(stencil); GL11.Clear((uint)(All11.ColorBufferBit | All11.DepthBufferBit | All11.StencilBufferBit)); } }