Announcement of the WriteableBitmapEx library version 0.9.0.0 that adds support for parametric curves: cubic Beziér spline and the Cardinal spline. Many other new features and a bunch of optimizations were also implemented. Rene Schulte also wrote a new sample application that shows the spline methods in action. The sample starts with a demo animation that uses the Cardinal spline DrawCurve method to draw an artificial plant that grows procedurally. The other part of the sample is interactive and allows to draw and manipulate Beziér and Cardinal splines with the mouse.