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feat: config-gated flat-scalar sea level (D-033, terrain-water task 04)

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SeaLevelModel: "flat" (one scalar, SeaLevelValue) or "field" (the
legacy latitude Lerp 0.26..0.15). Only GetSeaLevel's body changes —
all nine call sites (crater carve target, both flood fills, biome
split, beach band, Capitol window, town filters, A* zero-point)
inherit the model automatically; no consumer re-tuning. Default:
flat 0.15, pinned in ServerConfig.json.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
This commit is contained in:
Stewart Howe 2026-08-07 06:20:48 -04:00
parent 1f957b3430
commit 200adcaf5a
3 changed files with 31 additions and 2 deletions
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21
Core/Scripts/ConfigManager.cs
View file

@ -19,6 +19,13 @@ namespace IslaApocalypse.Core // Change this if your namespace is different
// not a shippable world. Default false.
public static bool SkipRoads = false;
// Sea-level model (D-033, terrain-water task 04): "flat" = one scalar sea
// level everywhere (SeaLevelValue); "field" = the legacy latitude Lerp
// (0.26 north .. 0.15 south). Generator-only — the runtime never computes
// sea level. Default: flat 0.15.
public static string SeaLevelModel = "flat";
public static float SeaLevelValue = 0.15f;
public static void LoadConfig()
{
string path = "res://ServerConfig.json";
@ -74,6 +81,20 @@ namespace IslaApocalypse.Core // Change this if your namespace is different
SkipRoads = (bool)data["SkipRoads"];
}
// Extract the sea-level model
if (data.ContainsKey("SeaLevelModel"))
{
string model = (string)data["SeaLevelModel"];
if (model == "flat" || model == "field")
SeaLevelModel = model;
else
GD.PrintErr($"[ConfigManager] Unknown SeaLevelModel '{model}'. Keeping '{SeaLevelModel}'.");
}
if (data.ContainsKey("SeaLevelValue"))
{
SeaLevelValue = (float)data["SeaLevelValue"];
}
switch (profile)
{
case "4K":

4
ServerConfig.json
View file

@ -2,5 +2,7 @@
"WorldSeed": 1409879727,
"MapProfile": "8K",
"TownDensity": "Normal",
"ChunkRadius": 32
"ChunkRadius": 32,
"SeaLevelModel": "flat",
"SeaLevelValue": 0.15
}

8
Tools/Scripts/MapGenerator.cs
View file

@ -1212,7 +1212,13 @@ public partial class MapGenerator : TextureRect
return astar.GetPointPath(from, to);
}
private float GetSeaLevel(float t) => Mathf.Lerp(0.26f, 0.15f, Mathf.Clamp(t, 0f, 1f));
// Sea-level model gate (D-033, task 04): "flat" returns the configured scalar;
// "field" is the legacy latitude Lerp. Pure numeric mapping either way (D-035);
// all nine call sites inherit whichever model config selects.
private float GetSeaLevel(float t) =>
ConfigManager.SeaLevelModel == "flat"
? ConfigManager.SeaLevelValue
: Mathf.Lerp(0.26f, 0.15f, Mathf.Clamp(t, 0f, 1f));
private Vector2I FindClosestPixel(Vector2 pos, HashSet<Vector2I> set) {
Vector2I closest = new Vector2I(0,0); float min = float.MaxValue;