Amphibian.Debug.TimeHistory.Draw C# (CSharp) Method

        public override void Draw(GameTime gameTime)
        {
            if (_history == null) {
                InitializeHistory();
                return;
            }

            SpriteFont font = debugManager.DebugFont;
            SpriteBatch spriteBatch = debugManager.SpriteBatch;
            Texture2D whiteTexture = debugManager.WhiteTexture;
            //Effect solidEffect = debugManager.SolidColorEffect;

            // 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;

            Matrix mtx = Matrix.CreateTranslation(
                        new Vector3(0, -rect.Height * (1.0f - 1.0f), 0));

            spriteBatch.Begin(SpriteSortMode.Deferred, null, null, null, null, null, mtx);

            spriteBatch.Draw(whiteTexture, rect, new Color(0, 0, 0, 200));

            spriteBatch.Draw(whiteTexture, new Rectangle(rect.X + (int)(_graphIndex * sampleStride), rect.Top, 1, rect.Height), Color.White);

            spriteBatch.End();

            Viewport viewport = spriteBatch.GraphicsDevice.Viewport;
            float nw = (viewport.Width > 0)
                ? 1f / viewport.Width : 0;
            float nh = (viewport.Height > 0)
                ? -1f / viewport.Height : 0;
            Matrix mat = new Matrix
            {
                M11 = nw * 2f,
                M22 = nh * 2f,
                M33 = 1f,
                M44 = 1f,
                M41 = -1f - nh,
                M42 = 1f - nw,
            };

            //solidEffect.Parameters["MatrixTransform"].SetValue(mtx * mat);

            //debugManager.BasicEffect.TextureEnabled = false;
            debugManager.BasicEffect.VertexColorEnabled = true;
            debugManager.BasicEffect.World = mtx * mat;

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

            int bars = _ruler.Frame.Bars.Length;

            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;

                    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);
                    _history[i][j][_graphIndex] = new VertexPositionColor(new Vector3(rect.X + _graphIndex * sampleStride, rect.Bottom - time * scaleY, 0), c);

                    //solidEffect.Parameters["solidColor"].SetValue(new Vector4(c.R, c.G, c.B, 1));
                    //solidEffect.CurrentTechnique.Passes[0].Apply();
                    debugManager.BasicEffect.CurrentTechnique.Passes[0].Apply();

                    spriteBatch.GraphicsDevice.DrawUserPrimitives(PrimitiveType.LineStrip, _history[i][j], 0, _historyCount - 1);

                    //_drawBatch.DrawPrimitivePath(_history2[i][j], Pens.White);

                    /*for (int seg = 1; seg < _historyCount; seg++) {
                        Vector3 pos1 = _history[i][j][seg - 1].Position;
                        Vector3 pos2 = _history[i][j][seg].Position;

                        _drawBatch.DrawPrimitiveLine(new Point((int)pos1.X, (int)pos1.Y), new Point((int)pos2.X, (int)pos2.Y), Pens.White);
                    }*/
                }
            }

            //solidEffect.Parameters["solidColor"].SetValue(new Vector4(1, 1, 1, .33f));
            //solidEffect.CurrentTechnique.Passes[0].Apply();

            spriteBatch.GraphicsDevice.DrawUserPrimitives(PrimitiveType.LineStrip, _total, 0, _historyCount - 1);
        }