Add support for custom time/calendar definitions #45
Description
KSPTOT correctly uses UT seconds internally, but the Kerbin/Earth time display and any UI fields that accept "days/years"
assume stock constants (Kerbin: 21600 s/day, 9201600 s/year). In modded installs (Sigma Dimensions dayLengthMultiplier,
rescale systems, Kronometer calendar changes), these conversions become incorrect/misleading even though UT remains correct. It is especially annoying when an input field requires days as units as this requires manual conversion.
Proposed change
Allow loading an optional custom time system definition from bodies.ini (new [Time] section) or an optional time.ini.
Fields:
system = kerbin_stock | earth_stock | customsecondsPerDaysecondsPerYear
Popular Configuration Examples
Stock Kerbin: 21,600 s/day, 9,201,600 s/year (426 x 6h days)
Stock Earth: 86,400 s/day, 31,536,000 s/year
JNSQ (native ~2.7x): 43,200 s/day (12h), 15,768,000 s/year (365 × 12h days)
JNSQ Rescale 10x (≈real scale): 86,400 s/day (24h), 31,536,000 s/year (365 × 24h days)
JNSQ Rescale 1x (≈stock scale): 21,600 s/day (6h), 9,972,540 s/year (Computed from the cited breakdown: 461 × 21,600 + 4:09:18.8 ≈ 9,972,540)
Rescale! 2.5x: 36,000 s/day (10h), 14,544,000 s/year (404 × 10h days)
Rescale! 3.2x: 43,200 s/day (12h), 16,459,200 s/year (381 × 12h days) (My Config)
Rescale! 6.4x: 64,800 s/day (18h), 23,284,800 s/year (359 × 18h days)
Rescale! 10x: 86,400 s/day (24h), 29,116,800 s/year (337 × 24h days)
Rescale! 10.625x: 86,400 s/day (24h), 29,980,800 s/year (347 × 24h days)
Notice that I may be wrong on these values, especially since leap years are a thing in Kronometer, but it should be close enough.
No idea how you would implement it via your mod, but if Kronometer is present, treat it as the source-of-truth to import since your mod already has a method to imports bodies from the game.
Example time.ini:
[Time]
; built-ins: kerbin_stock, earth_stock, custom
system = custom
; base conversion constants used ONLY for UI + "days/years" entry fields.
; UT seconds remains the truth for propagation.
secondsPerDay = 43200
secondsPerYear = 16459200
; optional: purely display/formatting preferences
hoursPerDay = 12
minutesPerHour = 60
secondsPerMinute = 60