Large-scale lighting rig mapping

[russss]

I guess I should probably put my marimapper adventures here rather than in the issues :)

I've got access to a large amount of addressable RGBW LED festoon and a Madrix licence. At new years we rigged some of the festoon up:

(The festoon system comes with an Art-Net controller, but it's just a 1-wire UCS2904 string which seems to be the same protocol as SK6812, so one day I should try and see if it works with WLED.)

Madrix only easily lets you map regular grids of pixels, but it does let you import a CSV of LED locations. I subsequently stumbled across marimapper and I added Art-Net support (#61) to make it work with this rig. I also implemented dark frame subtraction (#63), and with both of those I managed to map this rig surprisingly well using only my Macbook Pro webcam. But then I had to take it down.

Recently I had the opportunity to put it up again, this time with a few more (300) pixels - that's about 600W of LEDs:

After some additional fiddling around (#67, #68) I managed to get marimapper working very well on this (but not until after I'd taken 18 separate scans - that's probably wildly excessive now the bugs are fixed):

I still needed to get the model aligned on the axes though - as you can see it's a bit off. I wrote some quick Python to pull it into Blender as a mesh and rotated it:

...and then a separate bit of Python to export it from Blender as a Madrix-compatible CSV.