Add Shelf-Device Assembly and Rendering

[jmwright]

@julianstirling Where does (or should) the screw location information live? At a minimum I need a location and an axis for each screw. The axis could be something like +Y and -Y so that I can have the correct orientation of the screw relative to the hole it's going into.

[julianstirling]

@jmwright The problem with the text CI is that when pip installed without -e the devices.json is not in the expected location, we can either try to fix this or just add -e to the test yaml

[jmwright]

@jmwright The problem with the text CI is that when pip installed without -e the devices.json is not in the expected location, we can either try to fix this or just add -e to the test yaml

Thanks @julianstirling , I was wasting too much time not understanding that.

[julianstirling]

We probably want to add a try-except around the devices file reading that gives a more meaninful error if not installed with -e

[jmwright]

We probably want to add a try-except around the devices file reading that gives a more meaninful error if not installed with -e

@julianstirling Are you suggesting that should be part of this PR?

[jmwright]

Here are two samples of the shelf assembly rendering at work. One is the default with full color, the second is with a configurable black-and-white "theme" that is more in line with traditional annotated drawings. I left the automated assembly lines in place for both, and I left the assembly exploded. I'm a little disappointed in how the CAD kernel renders some edges, especially in the black-and-white version, but I think it's passable.

[jmwright]

@julianstirling I have marked this as ready for review.

[julianstirling]

I can imagine that for some of the shelves we will need different variables because most don't have screws coming top-down. some come in from the sides. We may want to move these attributes to the specific classes.

[jmwright]

because most don't have screws coming top-down. some come in from the sides. We may want to move these attributes to the specific classes.

There is a parameter for this. You set the axis of alignment for the screw to get it in the right orientation.

[julianstirling]

Thanks Jeremy, lots of hard work in this one. I love the render examples.

I think it's time to get these merged in. We can think about generalising to other shelves later.