LDCad script integration of LDInspector's collision detection

[Stefan Frenz]

one step further: some of the collisions my collision detection reports are "really existing" in LDraw but do not exist in real world, like this collision of an axle with a technic brick shown by LDInspector:

  01_CollidingParts_LDInspector.gif (Size: 41.62 KB / Downloads: 64)

Zooming very close in LDCad gives this (with some markers done in  GIMP):

  02_CollidingDetails_LDCad_Marked.gif (Size: 10.16 KB / Downloads: 63)

So this is not a collision to avoid but is reported correctly by LDInspector. Those kind of collisions have to be checked manually, maybe even marked afterwards as "this is ok". I would suggest some internal line type like "0 !LDxx IGNORECOLLISION [whatever]" with [whatever] indicating the checked part. How this "whatever" should look like, I have some ideas but no final proposal.

Unfortunately, the above shown collision is not reported by my current version of the collision detection in LDCad but only shown by LDInspector - I'm still searching for the reason.  Bugs are found, see updated version of the script.