For a scientific simulation, I need to stroke and reveal a path slowly over time, starting at the first point and traveling through all other points until reaching the last point. Like if you take a pencil and start slowly drawing a circle, spiral or triangle.
How could I do this with Core Animation or maybe OpenGL ES? Core Graphics would possibly be too slow to refresh at 60 fps.
There is CAKeyframeAnimation which can travel along a path, but I need a way of actually stroking that path while traveling along it.
Edit: Should run on iOS 3.2 as well!
CAShapeLayer
to display your path.strokeEnd
property from 0.0
to 1.0
.See this blog post of mine for details.