Add steady glow effect beneath hydrogen bomb

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Render a soft radial glow underneath the hydrogen bomb sprite in
UnitPass. H-bomb instances draw an enlarged quad (hBombGlowScale) so
there's room for the halo; a cell-space UV remap keeps the sprite at its
normal size while the margin becomes glow area. The glow is a steady
(non-pulsing) radial falloff in a warm amber, alpha-blended underneath
the sprite and suppressed in alt/affiliation view.

Detection uses a HYDROGEN_BOMB_COL shader define derived from
UNIT_ORDER, so it tracks the atlas layout rather than hard-coding the
column. All other units are unaffected (scale 1, same fillrate); this
stays a single program / two instanced draw calls.

Glow color, scale, strength, and falloff are exposed in
render-settings.json for live tuning via the debug GUI.

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This commit is contained in:

evanpelle

2026-06-05 19:47:07 -07:00

parent ee8c28331b

commit 385b4dd686

6 changed files with 94 additions and 15 deletions

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resources/atlases/unit-atlas.png

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