ksp-ro / lunartransferplanner Goto Github PK

My Lunar Transfer planner shows a window every 12 hours, but the inclination doesn't line up with the launch time. I tried ignoring the launch timer and launch when it said the "Launch Now Incl" was at 28.61 (the incl of my launch site) and the trajectory was way off. You can see the LTP behavior in the video below.

I tried launching when the time warp ended, and it was just as bad.

The first time I used Lunar Transfer Planner coincidentally happened to also be a career when I decided to play from New Zealand for something different.

The "First Transfer" display NEVER reaches zero. Not even close. As I time warp, the lowest it ever gets is about 4 hours, at which point it snaps to 16 hours.

As this was the first time I used Lunar Transfer Planner I assumed it was me just not understanding it. But others told me the timer reaches Zero when they play.

Eventually I figured out - they're all using Northern Hemisphere launch sites. I'm using a Southern Hemisphere launch site.

I switched my launch site to several different sites and found the behavior is consistent - if your launch site is in the southern hemisphere, the "First Transfer" will never reach zero. Ever. If your launch site is in the northern hemisphere, it works fine.

There must be something in the math that isn't correctly handing the case of starting from negative latitude degrees.

I think this is already known, I remember some discussion about it. But for tracking purposes:

There should normally be two due-east windows per day; maybe sometimes just one depending on lattitude. But there shouldn't ever be a full day without a window.

yet:

If the stock button is hidden via Janitor's Closet's "Hide here" feature, clicking the button inside the JC flyout does nothing instead of hiding/showing the planner window.

Worse, this somehow also breaks a button added to Blizzy's toolbar. Having to keep the appbar button unhidden in order to use the Toolbar button mostly defeats the purpose of having blizzy support.

(ideally there'd be a non-JC way to hide the appbar button; possibly easier than fixing whatever this is)

When entering a flight time, the planner will happily accept user input with at least 2 decimal places. However, before displaying the user's input, the planner rounds the input to a single decimal place. This makes it more difficult for the user to determine the actual input and catch errors, and for faster transfer times the small difference can be significant.

This can be seen after returning to KSC from a Venus probe. My latitude is 30.8!

After reloading the game it looks correct

After switching to Venus probe and back it's wrong again