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feat: complete file-based heightmap migration — tEXt sea_level, client relief, drop BLOB (#963)

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- heightmap.rs: read sea_level from the PNG tEXt chunk (bake writes it),
  default-fallback param; new test reads_sea_level_from_text_chunk.
- client atlas_viewer.gd: load reliefmap.png (color display) instead of
  heightmap.png (now 16-bit grayscale elevation, cascade-only).
- drop atlas_body_heightmaps: removed from systems-schema.sql; DROP TABLE in
  import_economics MIGRATION_SQL (the PNG is the store now).
- D-202 amendment: implementation-status note (consumer + producer done),
  resolving the review's 'reads done but producer pending' point.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
This commit is contained in:
jpmschweitzer
2026-05-23 08:23:23 +02:00
co-authored by Claude Opus 4.7
parent 3b2cd6914e
commit b71f339996
5 changed files with 50 additions and 29 deletions
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client/ui/implant/apps/atlas/atlas_viewer.gd
+5 -2
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@@ -262,12 +262,15 @@ func _load_heightmap() -> void:
var ref: Variant = _body.get("terrain_reference")
if ref == null or str(ref).is_empty():
return
var path: String = str(ref)
# terrain_reference points at <body>/heightmap.png — now the canonical
# 16-bit GRAYSCALE elevation (D-202 amended, #963). For display we load the
# color reliefmap.png that sits beside it.
var path: String = str(ref).get_base_dir() + "/reliefmap.png"
if not path.begins_with("/"):
var project_root: String = ProjectSettings.globalize_path("res://").get_base_dir().get_base_dir()
path = project_root + "/" + path
if not FileAccess.file_exists(path):
push_warning("AtlasViewer: terrain_reference not found at %s" % path)
push_warning("AtlasViewer: reliefmap not found at %s" % path)
return
var img := Image.load_from_file(path)
if img != null: