Clarification on redrawing objects in NinjaTrader using SharpDX

[Curerious]

The second is that the line is partially on the screen. As an example, it starts left of the screen and ends on the screen or off the screen to the right. In this case, I would recommend you let the library handle it

QuantKey_Bruce
So is this how you will draw a line that’s partially off the screen using SharpDX? Or you have a better way to draw?

        protected override void OnRender(ChartControl chartControl, ChartScale chartScale)
        {
            base.OnRender(chartControl, chartScale);
            
            // Create brush for the line
            SharpDX.Direct2D1.SolidColorBrush customDXBrush = new SharpDX.Direct2D1.SolidColorBrush(RenderTarget, SharpDX.Color.DodgerBlue);
            
            // Purposely crate an partially off the screen line
            SharpDX.Vector2 startPoint = new SharpDX.Vector2(ChartPanel.X - 20, ChartPanel.Y - 20);
            SharpDX.Vector2 endPoint = new SharpDX.Vector2(ChartPanel.X + ChartPanel.W + 20, ChartPanel.Y + ChartPanel.H + 20);
            RenderTarget.DrawLine(startPoint, endPoint, customDXBrush, 2);  
            
            // Dispose
            customDXBrush.Dispose();
        }​

The reason I am asking these is because you claimed that there a way for us to draw outside of the viewable region using SharpDX, and I don't know any of that, hence I am curious on how you will be able to accomplish such a thing. (By using negative coordinate as I demonstrated above or other methods..)

Yes, that's the basic idea. You COULD try to deduce which pixels of the line are visible (clipping) and I'm not saying you should or shouldn't but I will say most people don't. The time it takes SharpDX to figure out which pixels are on the screen is minimal, and if you try to do it yourself there's a much higher chance of introducing bugs, so your starting stance should be to let the library handle it and only try to do this yourself if you must - for instance, if you have some special case where the library's performance is the limiting factor (this is highly unlikely).