DX Brushes for drawing heatmap best practice.

[palinuro]

Hi,

I have an indicator that draws a heatmap in OnRender. At the moment I am creating a single SharpDX Brush at the beginning of OnRender using a base color, then reassigning it as necessary in a later "for" loop, and disposing of it at the end of OnRender:

				SharpDX.Direct2D1.Brush baseBrushDX = baseColor.ToDxBrush(RenderTarget);
				
				for // loop
				{
				SharpDX.Direct2D1.SolidColorBrush baseBrushDX  = new SharpDX.Direct2D1.SolidColorBrush(RenderTarget,GetColor(ratio, opacity));
				//do the drawing
					
				}
				baseBrushDX.Dispose();

This works fine, but I suspect it's not the best or most efficient way of handling it. Is there a better way?

Thanks

[NinjaTrader_AlanP]

Hello palinuro,

Thank you for your note.

Your script looks in line with the SampleCustomRender indicator preloaded on NinjaTrader, where you create a brush, assign and then dispose of it.

You could also see another example which follows the same format,

https://ninjatrader.com/support/forum/local_links.php?action=sendtofriend&catid=7&linkid=973

Please let us know if you need further assistance.

[mohawkTrader]

Could we get a fresh link to this code if available? Thanks.

[NinjaTrader_ChelseaB]

Hello mohawkTrader,

Below is a link to an example of efficiently re-using brushes.

https://ninjatrader.com/support/forum/forum/ninjatrader-8/indicator-development/98639-performance-optimization?p=789606#post789606

[mohawkTrader]

Thank you.