beezm/islaApocalypse
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

feat: shelf micro-relief + drainage incision (terrain-water task 10)

Browse source 
Two paired detail passes on the locked v5 skeleton, output-heights
only (classify path untouched):

PASS A — shelf micro-relief: +-ShelfReliefAmp (default 3 m) Simplex
skin (seed resolved+7409, ~40 undulations/island ~ 200 m features),
weighted by shelf-ness (full mid-shelf, feathered to zero 30% of a
band half-width into the risers) — both shelves get their rolling
texture back; risers and peaks untouched.

PASS B — drainage incision: D8 steepest-descent routing + height-
ordered flow accumulation over the curved+relieved land
(TerrainDetailPass — pure array machinery, named C++ candidate per
D-035); depth = K*accum^p*slope (K=0.78, p=0.45 concave, cap 30 m),
masked full on risers / 30% on shelves / zero on the toe, above the
plateau top, and within 1.2x CraterRadius (feathered to 1.4x); hard
clamp: carved height >= sea + 1 m. Ordering: curve -> relief ->
incision -> crater carve (the carve stays the final authority; carve
moved to its own pass 2c, bit-identical expression on both maps).
The pass prints its own MEASURED depth distribution.

Gate TerrainDetail "off"|"v1" (default v1; both passes one judged
unit; no-op without the curve) + ShelfReliefAmp dial. New TDTL section
(38 B: version + relief/incision params + seed offset) across
writer/parser/harness — blueprints stay self-describing.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
This commit is contained in:
Stewart Howe 2026-08-08 18:08:28 -04:00
parent c71026fd94
commit 45fe2ce034
7 changed files with 354 additions and 13 deletions
Download patch file Download diff file Expand all files Collapse all files

26
Tools/Scripts/RoundTripHarness.cs
View file

@ -121,6 +121,7 @@ public partial class RoundTripHarness : Node
ok &= CompareRoads("Trail", a.TrailRoads, b.TrailRoads);
ok &= CompareWater(a, b);
ok &= CompareTerrainCurve(a, b);
ok &= CompareTerrainDetail(a, b);
if (ok)
GD.Print($"[Harness] Semantic equality holds: {a.MapSize}x{a.MapSize} grid, " +
@ -215,6 +216,31 @@ public partial class RoundTripHarness : Node
return true;
}
private bool CompareTerrainDetail(WorldBlueprint a, WorldBlueprint b)
{
if (a.TerrainDetail == null && b.TerrainDetail == null)
{
GD.Print("[Harness] TDTL: absent in source — nothing to compare (and none reappeared).");
return true;
}
if (a.TerrainDetail == null || b.TerrainDetail == null)
{
GD.PrintErr("[Harness] TDTL presence mismatch between source and reread.");
return false;
}
var da = a.TerrainDetail; var db = b.TerrainDetail;
float[] fa = { da.Version, da.ReliefAmpM, da.ReliefFreqIslands, da.IncK, da.IncP, da.IncCapM, da.SeaClampRaw, da.CraterExclFactor, da.ShelfIncWeight, da.ReliefSeedOffset };
float[] fb = { db.Version, db.ReliefAmpM, db.ReliefFreqIslands, db.IncK, db.IncP, db.IncCapM, db.SeaClampRaw, db.CraterExclFactor, db.ShelfIncWeight, db.ReliefSeedOffset };
for (int i = 0; i < fa.Length; i++)
if (System.BitConverter.SingleToInt32Bits(fa[i]) != System.BitConverter.SingleToInt32Bits(fb[i]))
{
GD.PrintErr("[Harness] TDTL fields differ.");
return false;
}
GD.Print($"[Harness] TDTL equal (detail v{da.Version}).");
return true;
}
private bool CompareRoads(string tier, List<Vector2[]> a, List<Vector2[]> b)
{
if (a.Count != b.Count)