circle intersection fails

[KitWallace]

touching circles should work but doesnt

[KitWallace]

problem is that touching circles have only one point of intersection and the current algorithm assumes two - for two touching circles it should be simple to traverse one and then the other for a complete path. Need to formulate the edges so Hierholzer finds this solution

[KitWallace]

touching circles are OK if the toiuch is not the only crossing - edges wrong if 2 touching circles only

[KitWallace]

still a problem with small circle inside large circle - circumscribed circle almost works but has a couple of errors - odd