(bugfix) Fix bug where turrets cannot be loaded

[MadaraUchiha]

• Also increase ammo search range from 40 tiles to 100 tiles.
• Fix bug where lastSurrdoundingAmmoCheck would not be updated if
  GenClosestAmmo cache hit.
• Fixes Turrets cannot be reloaded // Turrets reloaded with wrong ammo type #1188

Additions

N/A

Changes

Adjustments to other features made in this merge, e.g.

• Increase turret ammo search radius from 40 tiles to 100 tiles.
• Fix bug where GenClosestAmmo cache hit would cause the TTL to never be updated.

References

• Closes Turrets cannot be reloaded // Turrets reloaded with wrong ammo type #1188

Reasoning

• Turrets are generally found on the edge of your base, far away from your stockpiles. Hence, the increase in search radius. It may be prudent to add a reason to why a turret can't be reloaded next time (something along the lines of "No compatible ammo in range")

Alternatives

Remove the GenClosestAmmo class, as suggested by @NoImageAvailable.

Testing

Check tests you have performed:

• Compiles without warnings
• Game runs without errors
• (For compatibility patches) ...with and without patched mod loaded
• Playtested a colony (1 hour, though not very extensively)

[NoImageAvailable]

What's the reasoning behind the try-catch block?

[N7Huntsman]

We certainly appreciate the help, though unfortunately the issue persists. In testing, I'm seeing some truly bizarre behavior, but I'm hopeful you'll find the details helpful. I've included video of my testing, and a trace for the reload job error I encountered.
Mod list: Harmony (from Steam), Core, Royalty, Combat Extended from your 'reload fix' branch.
Video: https://www.youtube.com/watch?v=TzJw2h3qvGU&feature=youtu.be
Trace from video: https://pastebin.com/Q7AUjSvS
Another, slightly different trace (not in the video, seems to be from a different part of the same job?): https://pastebin.com/9E0bQhcE
Observations:

• The reloading hauling job seems to get "attached" to a particular stack of ammo for a turret, and won't reload if that particular stack isn't available, even if other stacks of the same type are. Even if the ammo type is changed, they will reload from the "attached" stack, and the turrets ammo type will be set to the type of the "attached" stack.
• From other (unrecorded) testing, when manning the turret, colonists it will continue to reload from the "attached" stack so long as the stack has enough ammo in it to fill the turrets magazine. Once it is too low to refill the magazine, it will no longer reload from it, and will not switch to another stack.
• If a colonist has ammo used by the turret in their inventory, if they are selected and the turret is right-clicked, they will instantly drop the ammo from their inventory, even if assigned to it by a loadout.

[NoImageAvailable]

All those issues sound like issues with the caching system. Unless there is some 1.1 specific reason it has to be there it should be rolled back.

[MadaraUchiha]

What's the reasoning behind the try-catch block?

The variable tracking the last check should be updated regardless of whether the cache lookup bails early. I could have added the last check update before every return, but figured this was easier and clearer.

I do agree that if there's no real good reason for this cache class, it should be removed.

[NoImageAvailable]

So here's the case for reverting the cache class
Con:

• It saves some performance on colonies with lots of turrets
• Simply reverting it will wipe out Mechanoid reloading along with it

Pro:

• It's extremely buggy and will likely take extended effort to make work
• Turret reloading isn't a particularly huge performance drain to begin with
• It introduces lag in reloads even if it works

@MadaraUchiha can you ditch the caching in favor of 1.0 style reloading while keeping mech functionality intact (potentially by reimplementing it in a more reasonable format such as a ThinkNode)?

[MadaraUchiha]

My RimWorld specific C# experience is very much lacking, but I'll give it my best shot. If you have any resources that you think can be useful (i.e. save me on reading decompiled RimWorld code) please let me know :).

[N7Huntsman]

I'll ping @zhrocks11 on this for the sake of bringing him into the loop so he's aware that @MadaraUchiha will be taking over the turret issue.