[0.14.2.7] PowerViz lines not synced with display

[floral terrace]

A couple issues with the gorgeous new powerline visualization:

1. The lines are not quite synced to the camera movement. In the first screenshot, I'm in the process of scrolling the camera downwards (by pressing S, causing the ships to move upwards on the screen); the powerlines lag behind the ship tiles by a tile or two.
2. The powerlines are overdrawing multiple times on top of themselves. You can see it in the first image, especially on my ship (at the bottom of the image), but I took zoomed views as well; the second image shows what I think the powerviz lines are supposed to look like, with a clean zigzag pattern, but the third image (captured after zooming out and then back in, which seems to randomize the coherence of the visualization) shows multiple of these patterns, all slightly offset from each other.

The second issue, at least, is probably related to https://discord.com/channels/302515943945273347/1319182914012839977; having the visualizations render multiple times could certainly exacerbate any mesh-size issues!

I have a suspicion that there is a division going the wrong way somewhere in the powerviz rendering, just based on how it feels when zooming in and out; somewhere a ratio is getting larger when it should be getting smaller, and vice-versa.

like, something should be getting multiplied by the zoom factor, but instead it's getting divided. That sort of thing. Can't say for sure, but the interaction has that kind of flavor.

[sturdy sigil]

Got it! Might not be a high priority when we're back, but it's at least logged.
I think it's still rendering multiple copies of a tile's line, for one thing. And it shouldn't. Plus the scaling/UV tiling timer might have a mismatch or creeping value somewhere.

(Re: multiple copies, that seems to go away when only one power source is present.)