Attachment indicators

I’ve added new indicators that show the attachment points between parts, these indicators appear when a construction is frozen.  There are two types of indicator, one for rigid attachments, and one for rotating attachments.  I had to add extra data to the constructions for this, which unfortunately meant a change to the save game format, so old save games likely won’t load properly.

Rigid vs. rotating attachments

For a while now it’s been possible to attach blocks to axles either rigidly or free to rotate (pressing E to cycle between these two modes when a construction is selected).  However, gears and wheels could only be attached rigidly to axles.

Well, now gears and wheels can also be attached free to rotate, just like blocks.  This opens up more possibilities when building, but it does mean you have to be careful to select the correct attachment mode for what you’re trying to do.