It all started with rather complex code using corner stitching and inference in Spinifex. This code did not work. To fix it would have made it a monster, and this just for some tiny transistors. Hence I decided to use an analytic approach instead of Shand's algorithmic approach.

As it then comes, the code subsequently wandered in a slightly modified form in Genista. Until Christian LeCoq said: zis iz exactli wat I need for Spice. So here it is in a separate module for your delight.