T-1118: gen_region_grid overlay (label TMP) — _draw_gen_region_grid
copies _draw_gen_district's self-contained mapping (dims from the
layer dict); mean-temp cold-to-hot ramp over -50..+50 C;
REGION_TEMP_NONE_DC airless sentinel = skip-cell (undrawn, never an
invented color); legend entry.
T-1119 (touch points 3-6): quarter_footprints protocol passthrough;
gen_l4_quarters overlay (label QTR) — density-scaled glyph anchored
on the L3 settlement dot joined by city_id, shape = dominant district
type (corner-tab/diamond marks for Commercial/Industrial/
Administrative), color = density ramp on the settlement-gold family,
zoom-gated at SETTLEMENT_LABEL_MIN_ZOOM; landmark/corridor counts
never drawn (D-226(d) tooltip-only ceiling); legend entry.
Structure: atlas_viewer.gd and protocol.gd were over gdlint's
1000-line cap before this batch; cleanly-separable responsibilities
extracted on existing precedent — atlas_generation_state.gd (per-layer
data + accessors), atlas_generation_proxy.gd (polling/retry/pending
machinery), atlas_overlay_colors.gd (pure ramp/shape lookups),
atlas_map_protocol.gd (atlas/starmap/citynames codec, the
browse_protocol.gd delegate pattern). Public APIs preserved exactly;
_gen_state stays a field default (RefCounted, pre-_ready safe) because
_ready()-construction breaks every bare AtlasViewer.new() test —
documented inline.
Tests: registration + round-trip for both overlays; pure-function
suites for the temp ramp (endpoints/midpoint/clamp/sentinel) and
quarter glyph (scaling, zoom gate, ramp, notch across all 9
DistrictTypes); Tier-2 replay asserts exact literals from the real
server-generated fixture incl. the airless sentinel. Color.lerp(a,b,
1.0) is not bit-exact to b — endpoint assertions use per-component
is_equal_approx. Full suite 3094/3094; gdlint zero warnings incl. the
two previously-over-cap files. Live capture: legend grows to 7
sections, TMP/QTR toggles clean against a live server.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
jpmschweitzerandClaude Fable 5
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