ColumnTarget

Interface: ColumnTarget

Defined in: frame/ColumnTarget.ts:9

Per-reel target shape for ReelSet.setResult and ReelSetBuilder.initialFrame. One object per reel.

Use this for every result grid that crosses a worker, network, or serializer boundary. The shape survives structuredClone, JSON, and postMessage round-trips.

Properties

Property	Type	Description	Defined in
`bufferAbove?`	(`string` \| `undefined`)[]	Buffer-above target symbols. `bufferAbove[0]` is the slot closest to the visible top row; later indices go further above. Up to `bufferSymbols` entries are honored. Big-symbol anchors may sit here. Place a multi-cell symbol id (one whose `SymbolData.size.h > 1`) at any `bufferAbove[i]` and the coordinator paints OCCUPIED stubs across the rest of the block, including any cells that fall in visible. The block must fit on the strip end-to-end (`anchor.row + h <= visibleRows + bufferBelow`); the portion above visible is clipped by the reel mask. This is the “tail-visible” partial-landing pattern.	frame/ColumnTarget.ts:25
`bufferBelow?`	(`string` \| `undefined`)[]	Buffer-below target symbols. `bufferBelow[0]` is the slot closest to the visible bottom row; later indices go further below. Up to `bufferSymbols` entries are honored. Big-symbol stubs may sit here. A block anchored at the last visible row with `h > 1` will have its non-anchor cells spill into `bufferBelow` automatically. You can also place an anchor here, but the block then lies entirely off-screen (legal but invisible).	frame/ColumnTarget.ts:36
`visible`	`string`[]	Visible-area target symbols, indexed `0 ... visibleRows-1`.	frame/ColumnTarget.ts:11