Quite a while ago I made a hatch pattern maker for V4 / V5 32 bit, but never updated it for 64 bit. After getting a little nudge to update it, I finally did, and I’ll put the result here:
makeHatch.rhp (84 KB)
It is still the same ol’ kludgey thing as the 32 bit version (so no real updates), but it works. The major drawback to it right now is that it only makes a *.pat file, so you have to make a pattern, save it out, open Rhino Options -> Annotation -> Hatch and Import the *.pat file you just made.
As for documentation for use, the plug-in adds one command: makeHatch. The quick rundown for the options would be: X and Y padding is how much room to add between repeating the curves selected. Currently you can only have non-negative values (so no overlapping). DecimationTolerance is how roughly curves are broken into line segments. The plug-in tries to come up with something reasonable based on the bounding box size and the file tolerance; tighter tolerance = longer definitions. MaxBboxGap is the number of bounding boxes a curve can be hidden before being drawn again (because all hatch lines are infinite); higher numbers = longer definitions. Preview sizes are pretty straight forward.
I hope you find some use in it. I have wanted to update it to make it function better (tile offsets for making running bond patterns easier, more friendly UI, etc), but time never seems to be on my side