- Resolve exact Diablo II v1.13c DS1 Type-2 Object #33 (Objects.txt ID 59) Town Portal sub-tiles across all 9 town presets (Acts 1-5) in src/game/portal.ts
- Implement TownPortalSlot.mouthInLevel(levelId) and enterFrom(levelId) per ObjMode.cpp:3245 (wilderness -> town keeps portal open; town -> wilderness closes portal)
- Add 20-charge quantity tracking for Tome of Town Portal (tbk) and Tome of Identify (ibk), right-click casting for tbk/tsc in inventory, and scroll-to-tome refill
- Bake authentic TP DCC sprite atlases (tptrlitophth, tphdlitophth, tptrlitonhth, tphdlitonhth) into public/overlays/town_portal_*
- Render Town Portal entity with OP/ON DCC animation, dynamic blue light (Light=19, RGB 64/110/255), overhead destination label, and proximity walk-to-interact in src/scene/act-scene.ts
- Add unit and parity tests in tests/town-portal.test.ts
Closes#394
1. Sub-Tile Scatter Spacing (D2Common.dll COLLISION_GetFreeCoordinatesImpl 0x6FD9D140):
- Unify GameEngine.triggerMonsterDrop, GameEngine.dropItem, GameEngine.dropGold,
and net-scene monster drops on findIsometricDropPosition (16x8 sub-tile diamond
lattice, 16px orthogonal / 8px vertical spacing) instead of 80x40px macro cells.
- Derive GroundItemEntity (cellX, cellY) from final scattered (finalX, finalY)
via worldToCell rather than overwriting with stale origin cell coordinates.
2. Monster vs. Inventory Drop Metadata & Bilingual Name Parity:
- Add formatBilingualGroundItemName in src/game/ground-items.ts using
translateItemName / translateMagicName / translateRareName so raw monster-dropped
Item objects receive identical '中文名 (English Name)' nameZh as UiInventoryItem.
- Detect runes via isRuneCode in resolveItemQualityString so monster-dropped runes
render with #ff9c18 orange labels matching inventory-dropped runes.
- Preserve flippyFile, dropSound, and dropSfxFrame in itemToUiInventoryItem, fix
socket count resolution so unsocketed items do not inherit base.gemsockets, and
add embedded drop table fallback in resolveGroundItemMetadata.
3. Anti-Stacking for Sequential Player Inventory/Body Drops:
- Simplify act-scene onDropItemToGround / onDropGoldToGround to delegate directly
to engine.dropItem / engine.dropGold at (player.x, player.y) so every dropped
item checks engine.groundItems.all and scatters to a unique sub-tile slot.
Fixes#479
- Hover ground item icon reveals authentic name label without needing Alt key (Fixes#447)
- Connect SceneMouseController pointermove/pointerleave with GroundLabelOverlay hover callback and ladder layout rendering
- Correct Grand Charm (cm3) and Gheed's Fortune ground flippy sprite mapping to flpchm3 (Fixes#452)
- Correct Small Charm (cm1) and Large Charm (cm2) default flippy mappings to flpchm1 and flpchm2
- Add 1.13c charm ground flippy resolution tier and Chinese semantic fallbacks in resolveGroundItemSpriteRect
- Add comprehensive vitest suites in tests/charm-ground-flippy-parity.test.ts and tests/ground-items-alt-labels.test.ts
Pipeline-built Items carry code as the 4-byte space-padded .d2s field
('dr3 '), so the codeToFlippyFile lookup missed and every drop fell through
to the inventory-size guess (2x2 -> invbox, the Horadric Cube). Picking the
item up rebuilt it via itemToUiInventoryItem, which is why re-dropping
looked correct. Normalize the code (trim, fall back to base.id) in both
resolveItemSpriteRect and resolveGroundItemSpriteRect.
Adds tests/ground-drop-sprite.test.ts: raw-drop sprite == post-pickup sprite
for 400 Act 1 Champ A rolls, and every droppable base with a baked flippy
resolves to it directly.
- Implement all 33 Paladin aura overlay targets (13 front/back pairs + 7 full rings) with authentic 1.13c Overlay.txt definitions
- Update offline overlay baking script scripts/pack-overlays.ts and generated metadata src/render/overlays-meta.ts with zero runtime MPQ parsing
- Align baked UI atlases and manifest in public/ui/ and src/ui/baked-ui-meta.ts
- Expand tests/skills/aura-target-parity.test.ts to 7 dimensions including 3D Isometric Aura Ring Sandwich depth layering
- Fix hero class walk offset assertion in tests/hero-classes-art.test.ts
- Add set item icon dye tests in tests/set-items-icons-dye.test.ts
- Correct Swirling Crystal (oba) invWidth from 2 to 1 (1x3) per canonical 1.13c weapons.txt for both The Oculus (STARTER_EQUIPPED_GEAR.weapon1) and Tal Rasha's Lidless Eye (CLASS_EXCLUSIVE_SETS.sor.weapon1)
- Fix The Oculus invFile from invbst (1x4 Battle Staff) to canonical invob5 (1x3 Swirling Crystal sprite)
- Audit all starter item dimensions across all 7 classes against canonical 1.13c weapons.txt, armor.txt, and misc.txt
- Add tests/starter-items-inv-size-parity.test.ts to prevent inventory size regressions
- Extract and stitch all 213 Blizzard flp*.dc6 resting frames into items-atlas.png
- Support all 4 flpgld gold pile size groups and color dye transforms
- Implement resolveGroundItemSpriteRect() in src/ui/inventory.ts
- Render authentic isometric ground art with contact shadow in drawGroundItem()
- Eliminate synthetic blue boxes, 2D perspective shear hacks, and sparkle white dots
- Fix engine pickup entity matching so picked items are cleanly removed with zero residual dots
- Add tests/ground-items-flippy-parity.test.ts
troytt