Strict coast ships can't enter tiny island cities

• Reporter: lexxie9952
• Owner: cazfi
• Type: Bugs
• Status: Closed
• Component: General
• MileStone: 2.6.6 (closed)
• Priority: 5 - Medium
• Severity: 5 - Medium
• Resolution: Fixed
• File: 3

Details Reply

Photo of a boat unit who is unable to enter a tiny island city. https://cdn.discordapp.com/attachments/358555060382203905/861719109272207380/unknown.png

blamed: map.c:is_safe_ocean() and/or the conditional logic in the 3 places in movement.c which include is_safe_ocean in a conditional logic expression

Ticket History (3/11 Histories)

2021-07-06 17:17 Updated by: lexxie9952

• New Ticket "Strict coast ships can't enter tiny island cities" created

2021-07-07 02:40 Updated by: ihnatus

Comment Reply

Yes, there is an omission dating back to long ago ("Trireme" flag in 2.6, "CoastStrict" later) that a coast strict unit tests adjacent tiles for being a safe coast but not its own one, so on a one-tile safe coast region it is illegal even if the terrain is safe coast itself and/or city. Even if we test the unit's tile for safe coast, btw, such a unit won't be able to exist in an oceanic city not adjacent to a safe coast, even if it is able to exist on adjacent tiles; that looks like also a bug.

2021-09-22 05:53 Updated by: cazfi

Comment Reply

Reply To ihnatus

Even if we test the unit's tile for safe coast, btw, such a unit won't be able to exist in an oceanic city not adjacent to a safe coast, even if it is able to exist on adjacent tiles; that looks like also a bug.

Reading the code, I don't see the same problem with these as with moving to a tile. Related functions check for a safe city's existence *before* considering if unit is a CoastStrict unit outside safe coast.

2021-09-22 06:04 Updated by: cazfi

• File 0032-Allow-moving-CoastStrict-unit-to-ocean-city-or-city-.patch (File ID: 7511) is attached

2021-09-22 06:04 Updated by: cazfi

• File 0013-Allow-moving-CoastStrict-unit-to-ocean-city-or-city-.patch (File ID: 7512) is attached

2021-09-22 06:04 Updated by: cazfi

• File 0011-Allow-moving-Trireme-unit-to-ocean-city-or-city-in-1.patch (File ID: 7513) is attached

2021-09-22 06:04 Updated by: cazfi

• Resolution Update from None to Accepted
• Milestone Update from (None) to 2.6.6 (closed)

2021-09-22 06:05 Updated by: cazfi

• Component Update from (None) to General

2021-09-23 13:27 Updated by: None

Comment Reply

Wow that was easy. Thanks.

I was checking around and found this in movement.c, bool can_exist_at_tile(...) ...

/* UTYF_COAST_STRICT unit cannot exist in an ocean tile without access to land. */ if (utype_has_flag(utype, UTYF_COAST_STRICT)

&& !is_safe_ocean(nmap, ptile)) {

return FALSE;

}

Maybe a dumb question but would this also need a "&& !pcity" condition in there too?

2021-09-25 10:03 Updated by: cazfi

Comment Reply

Reply To (Anonymous)

Wow that was easy. Thanks. I was checking around and found this in movement.c, bool can_exist_at_tile(...) ... /* UTYF_COAST_STRICT unit cannot exist in an ocean tile without access to land. */ if (utype_has_flag(utype, UTYF_COAST_STRICT) && !is_safe_ocean(nmap, ptile)) { return FALSE; } Maybe a dumb question but would this also need a "&& !pcity" condition in there too?

I think that if there's a relevant city, the function has returned already, and execution never even reach that code.

2021-09-29 00:37 Updated by: cazfi

• Status Update from Open to Closed
• Owner Update from (None) to cazfi
• Resolution Update from Accepted to Fixed