How to built a point
html5 prepared browsers allow for better and easier presentation of an old graphic.
Buttons for user interaction.
There are simply too many steps for single stepping through the animation, sorry for that, but you can simply stop where you want for close inspection.
The accompanying photos can be found on this page: building turnouts illustrated
copyright: Henk Oversloot
original animated SVG graphics dating from 2006 written in java using Eclipse and Batik converted for html5 enabled browsers using javascript.
date: 14 mar 2013