What it does
A screen spanning a 2.6 mm main wall and a 5.2 mm side wall has two output groups, one with half the pixel density of the other. Drive them from one canvas at 1:1 and a layer crossing the join changes physical size the moment it crosses: same pixels, twice the millimetres.
LivePremier's answer is pitch compensation, a ratio per output group saying how much canvas each group's raster is worth. The manual gives it four sentences and doesn't say which way round the ratio goes, what the field will hold, or what happens when the answer isn't a round number. All three matter, and this works all three out.
It'll also argue with you about the reference. The ratio scales a raster up into canvas pixels, so the reference should be the group with the most pixels per millimetre. Every other group then lands above 1.000 and scales down, which a video processor does well and nobody notices. Pick a coarse group instead and the fine wall lands below 1.000, gets handed fewer canvas pixels than it physically has, and spends the whole show upscaling, visibly, on the best-pitch surface in the room.
- H and V ratios ready to type into Web RCS, from each group's raster and pitch — or from its measured size, with the pitch falling out
- The canvas footprint each output group takes, and the screen canvas that results
- The error the device's three-decimal ratio field costs you, in millimetres, at the far edge of each wall
- Defaults to the finest wall as the reference, and says so when you override it
- Runs entirely in the browser with no backend, so a client's set design is never uploaded anywhere
- Self-hostable as a container image, with a compose file and an Unraid template
Where it stands
In development. The arithmetic doesn't come from the user manual. I drove it into a running AW LivePremier Simulator 6.2.73 and read the answers back off the wire: fourteen ratio and raster pairs written to a real output's pitchRatioH and pitchRatioV, with the resulting pitchedWidth and pitchedHeight recorded. Those readings are pinned as tests, and they're what settled which way round the ratio goes, the field's range and precision, and the fact that the device floors the canvas footprint rather than rounding it. No pitch-compensated screen built from this has been driven onto real LED walls, and none of it has touched physical Aquilon hardware. The simulator runs the same nlc-platform web application and object model, but it isn't the switcher. It's hosted, and there's also a container image for a network that can't reach the web.