Performance of DrawingVisual vs Canvas.OnRender for lots of constantly changing shapes

Question

I\'m working on a game-like app which has up to a thousand shapes (ellipses and lines) that constantly change at 60fps. Having read an excellent article on rendering many mo

Answer 1

I thought Petzold explains in this paragraph;

The ScatterPlotVisual class works by creating a DrawingVisual object for each DataPoint. When the properties of a DataPoint object change, the class only needs to alter the DrawingVisual associated with that DataPoint.

Which builds on an earlier explanation;

Whenever the ItemsSource property changes, or the collection changes, or a property of the DataPoint objects in the collection changes, ScatterPlotRender calls InvalidateVisual. This generates a call to OnRender, which draws the entire scatter plot.

Is this what your asking about?

By the way, this is a fairly recent high-performance WPF tutorial, many tens of thousands of points in that plot, it is 3D rendered and animated also (even uses mouse input to drive some of the transforms).