Below ICON_MIN_CELL_PX (42px cell width) everything still draws as the
plain colored dot it always has, a game icon at that size would just
be an illegible smudge. Past that threshold, Nest/Target/Ally markers
switch to the game's own unit icon for their type, drawn as a Cairo
surface (raw Cairo draw_func, not GTK widgets, so this loads PNGs
directly via cairo.ImageSurface.create_from_png(), cached per path so
a repeat draw doesn't re-hit disk).
icons.py's target_icon_path(type, is_ally) is the TargetType -> icon
file mapping, best-effort guesses the same way the Shell descriptions
were (flagged for correction): most types map onto the game's own
Enemy_*/Friendly_* unit icons (is_ally picks which set, falling back
to Enemy_ if a given type has no Friendly_ counterpart), TANK reuses
the Armor_Mechanized artwork (no dedicated tank icon exists), and
STRIKE gets its own crosshair (assets/icons/misc/Crosshair.png, not a
unit icon at all, a planned impact point) rather than a unit icon.
An ambiguous candidate (hollow, dashed-ring marker) never switches to
the icon regardless of zoom, an icon there would look more confident
about an unconfirmed position than the dashed ring is supposed to
convey.
Verified with rendered screenshots at both zoom levels: plain dots
below the threshold, real icons above it (Tank/Infantry/MarineGarrison/
Nest all confirmed showing their correct icons), and the Strike
crosshair specifically.
Pulled from the game's own GameAssets/Assets/Texture2D (gitignored as a
whole, not redistributed wholesale) into a tracked assets/icons/ so
they're actually usable in FeNigma's UI instead of us redrawing
equivalents:
- targets/enemy/, targets/friendly/: one marker per game unit type
('Enemy_*.png' / 'Friendly_*.png', the source files spell the latter
'Frendly_*.png', corrected on copy).
- reference_points/: the four lettered RP markers ('Refrence_Point_*.png'
in the source, typo corrected the same way).
- shells/: one icon per Shell enum member (shells.py), named to match
exactly so they're a direct Shell.name lookup, no mapping table
needed. A few source files don't carry the shell's short code in
their name (Mustard Gas_DemoBlocked -> MSTD, Tear Gas -> TEAR,
Propaganda -> PRPG, Phosgene -> PHGN, Nuclear -> ATMC), documented in
assets/icons/README.md.
- nest/IronNest.png: the Iron Nest/FDC unit icon.
- misc/ScoutPlane.png: fits the scout-flight planning feature.
Also commits the (already-made, previously uncommitted) .gitignore
entry for GameAssets itself, which is what makes pulling individual
icons out into a tracked directory sensible instead of contradictory.
