public void CreateGraphicsContext(int deviceWidth, int deviceHeight) { GraphicsDeviceManager m_Manager = new GraphicsDeviceManager(game); m_Manager.PreferredBackBufferWidth = deviceWidth; m_Manager.PreferredBackBufferHeight = deviceHeight; if (m_XNA_GraphicsDevice != null) return false; //create an XNA graphics device m_XNA_GraphicsDevice = m_Manager.GraphicsDevice(); //check if graphics device was created Debug.Assert(m_XNA_GraphicsDevice != null, "XNA Graphics Device did not Initialize"); m_EffectPool = new EffectPool(); m_BasicEffect = new BasicEffect(m_XNA_GraphicsDevice, m_EffectPool); //set the model matrix to identity m_BasicEffect.World = Matrix.Identity; m_BasicEffect.View = Matrix.Identity; m_BasicEffect.Projection = Matrix.Identity; m_XNA_GraphicsDevice.RenderState.DepthBufferEnable = true; m_XNA_GraphicsDevice.RenderState.DepthBufferWriteEnable = true; return true; }