Axiom.RenderSystems.DirectX9.D3DRenderSystem.BeginFrame C# (CSharp) Метод

        public override void BeginFrame()
        {
            if (activeViewport == null)
                throw new AxiomException( "BeingFrame cannot run without an active viewport." );

            // begin the D3D scene for the current viewport
            ActiveD3D9Device.BeginScene();

            _lastVertexSourceCount = 0;

            // Clear left overs of previous viewport.
            // I.E: Viewport A can use 3 different textures and light states
            // When trying to render viewport B these settings should be cleared, otherwise 
            // graphical artifacts might occur.
            _deviceManager.ActiveDevice.ClearDeviceStreams();
        }