Tag: immediate mode drawing

Hello,

I am creating a very demanding application with several vertically stacked charts. I would like to use the best approach for using brushes / pens / sprites and textures.

1. Can I leave the resources between render passes or do I have to always dispose it after a render pass?
2. Which method is the most performant when drawing images? Should I use ISprite2d or ITexture2d. Is the DrawSprites the most performant?

Hello,

I need to draw a lot of annotations. Those are pretty simple figures/icons. The gotchas:

1. The axis (ticks/labels) should be inside of the chart area.
2. The annotation should be drawn on the border of the axis/chart.

I started to use the immediate mode for this. Was pretty happy to see there are Layers in the render context and I thought I could schedule or manipulate the rendereings when it comes to what I want. Unfotunately it is immutable.

The first thing I could come over by manipulating the template at runtime although I do not want to re-template it in fear of bigger template changes than the change of Grid.Row at runtime.
The second part is more tricky now. I would like to have fine grained control over the ordering of what is drawn. At least above/below the RenderableSeries but best to select the layers as wanted.

One big deal I did overcome is some mouse hover action for the drawn annotations.

So my idea now would be to add custom rendering layers like the HighQualityRenderSurface but I have no Idea how this impacts the performance. I already have a target of ~30 charts. Fortunately visible ones would be only around 8 so I could manipualte the visibility on scroll to prevent render.

I attached an example of the idea.

What I tried before was interfering with The ISciChartRenderer to wrap a before and after render. The problem is the Services are registered and the value is asigned to a property so that my re-register (swap) has no effect. Finally I got it working using a IAnnotationsDrawingProvider wrapper.

You can find the related post on StackOverflow:
https://stackoverflow.com/questions/78436617/immediate-mode-scichart-rendering-with-ordering-and-axis-positioning-custom-fas

EDIT:
For the fine grained control over the rendering order I managed to use the Layers just need to do it before any counterpart manages to schedule an action (ISciChartRenderer worked just the base class private variable assignment is nasty).

Hi,

As part of our evaluation of SciChart a very important point for us is responsiveness, as I mentioned in another post

A point that is causing concerns is that we need to update the UI in a reliable, synchronous, non-deferred way, even if this means blocking the user input. So for us the only method that works is to user RenderPriority.Immediate.

Unfortunately it seems that for complex data were the rendering starts to struggle SciChart just skips updates to the view. We tried to manually force the update using code, but we have the same problem described here (i.e. RenderPriority.Manual does not work).

So, how can we be sure that the UI gets updated every single time we update a DataSeries, regardless of load, user input, whatever?