Amphibian.Debug.TimeHistory.Update C# (CSharp) Метод

        public override void Update(GameTime gameTime)
        {
            // Update draw string.
            stringBuilder.Length = 0;

            if (_history == null) {
                InitializeHistory();
                return;
            }

            SpriteFont font = debugManager.DebugFont;

            // Compute command window size and draw.
            float w = GraphicsDevice.Viewport.Width;
            float h = GraphicsDevice.Viewport.Height;
            float topMargin = h * 0.1f;
            float leftMargin = w * 0.1f;

            Rectangle rect = new Rectangle();
            rect.X = (int)leftMargin;
            rect.Y = (int)topMargin;
            rect.Width = (int)(w * 0.8f);
            rect.Height = (int)(20 * font.LineSpacing);

            float sampleStride = rect.Width / (float)_historyCount;

            const float frameSpan = 1.0f / 60.0f * 1000f;
            float scaleY = rect.Height * 1f / frameSpan;

            if (_total == null)
                _total = InitializeHistory(new Vector2(rect.Left, rect.Bottom), sampleStride, Color.White * 0.33f);
            if (_total2 == null)
                _total2 = InitializeHistory2(new Vector2(rect.Left, rect.Bottom), sampleStride);

            int bars = _ruler.Frame.Bars.Length;

            float accum = 0;
            for (int i = 0; i < bars; i++) {
                for (int j = 0; j < _ruler.Frame.Bars[i].MarkCount; j++) {
                    float time = _ruler.Frame.Bars[i].Markers[j].EndTime - _ruler.Frame.Bars[i].Markers[j].BeginTime;
                    accum += time;

                    Color c = _ruler.Frame.Bars[i].Markers[j].Color;

                    if (_history[i][j] == null)
                        _history[i][j] = InitializeHistory(new Vector2(rect.Left, rect.Bottom), sampleStride, c);
                    if (_history2[i][j] == null)
                        _history2[i][j] = InitializeHistory2(new Vector2(rect.Left, rect.Bottom), sampleStride);
                    _history[i][j][_graphIndex] = new VertexPositionColor(new Vector3(rect.X + _graphIndex * sampleStride, rect.Bottom - time * scaleY, 0), c);
                    _history2[i][j][_graphIndex] = new Vector2(rect.X + _graphIndex * sampleStride, rect.Bottom - time * scaleY);
                }
            }

            _total[_graphIndex] = new VertexPositionColor(new Vector3(rect.X + _graphIndex * sampleStride, rect.Bottom - accum * scaleY, 0), Color.White * .33f);
            _total2[_graphIndex] = new Vector2(rect.X + _graphIndex * sampleStride, rect.Bottom - accum * scaleY);

            _graphIndex++;
            if (_graphIndex >= _historyCount)
                _graphIndex = 0;

            base.Update(gameTime);
        }