# Climate constants for district temperature derivation (T-1024, D-239 §2).
#
# Source-canonical — loaded by the Rust simulation at runtime.
# These values mirror the tuned constants from tooling/planet-gen/planet_simulation.py.
# Changing these constants does NOT require a DB migration (runtime file, not DB).
# To tune: edit here, rerun the server, inspect Atlas temperature maps.
#
# Two tables are required:
#   [greenhouse_offset_c] — mean-annual base temperature offset by atmosphere class.
#   [diurnal_amplitude_c] — day/night swing AMPLITUDE by atmosphere class.
#
# Temperature derivation formula (D-239 §2):
#   T_base = T_stellar_equilibrium + greenhouse_offset_c[atmosphere]
#   T_mean = T_base + latitude_term + elevation_lapse_term
#   T_diurnal_amplitude = diurnal_amplitude_c[atmosphere]
#
# No atmosphere → temperature_c = None (airless body; D-227).

[greenhouse_offset_c]
# Greenhouse warming contribution per atmosphere class (°C above bare rock).
# "none" is not present — airless bodies skip the climate branch entirely (D-227).
# Values from planet_simulation.py STAR_LUMINOSITY + greenhouse table.
thin     = 8
standard = 33
toxic    = 33  # treated as standard greenhouse for thermal purposes
breathable = 33  # synonym for standard
dense    = 80

[diurnal_amplitude_c]
# Day/night swing amplitude (°C). The actual swing is ±amplitude around the
# mean temperature; the morning minimum is T_mean - amplitude, noon maximum is
# T_mean + amplitude. Thick/dense atmosphere = small swing (heat redistribution);
# thin/no atmosphere = large swing.
#
# "none" is excluded — airless bodies have no climate temperature (D-227).
# Values are plausible physics; tune without recompile by editing this file.
thin       = 50   # ~50°C day/night swing: large, like Mars
standard   = 15   # ~15°C: Earth-like moderate swing
toxic      = 20   # intermediate: thick but maybe less redistribution
breathable = 15   # synonym for standard
dense      = 3    # ~3°C: Venus-like near-uniform temperature

# ---------------------------------------------------------------------------
# Stellar luminosity lookup (relative to Sol = 1.0).
# Midpoint per spectral type, matching planet_simulation.py STAR_LUMINOSITY.
# Used to derive distance_au at runtime from orbital_period_days via Kepler's 3rd law.
#
# These values are also used to compute T_stellar_equilibrium:
#   T_eq_K = 278.5 * (luminosity ^ 0.25) / sqrt(distance_au)
# ---------------------------------------------------------------------------
[star_luminosity]
O = 100000.0
B = 1000.0
A = 10.0
F = 2.5
G = 1.0
K = 0.4
M = 0.04