ReelAxis

Interface: ReelAxis

Defined in: core/ReelAxis.ts:29

Immutable projection between screen space and a reel’s travel/cross axes.

One per reel, built by the builder and injected into ReelMotion, Reel, and every phase. It carries no per-frame allocation on the hot path - addMain is one property lookup and one +=. See ADR 016 sections 3.1-3.2.

The point is to keep direction (“which way is backwards for this reel”) out of the sign of a raw delta, and orientation (“which screen axis”) out of a hardcoded .y. Public geometry stays screen-space (see toLocal/toScreen), so third-party ReelSymbol subclasses are unaffected.

Properties#

Property	Modifier	Type	Description	Defined in
`crossProp`	`readonly`	`"x"` \| `"y"`	Pixi / GSAP property key for the reel-marching axis.	core/ReelAxis.ts:37
`direction`	`readonly`	`Direction`	-	core/ReelAxis.ts:31
`feedEdge`	`readonly`	`"start"` \| `"end"`	Which strip edge new symbols enter from: ‘start’ when polarity > 0.	core/ReelAxis.ts:39
`mainProp`	`readonly`	`"x"` \| `"y"`	Pixi / GSAP property key for the travel axis.	core/ReelAxis.ts:35
`orientation`	`readonly`	`Orientation`	-	core/ReelAxis.ts:30
`polarity`	`readonly`	`-1` \| `1`	+1 for ‘forward’, -1 for ‘reverse’.	core/ReelAxis.ts:33

Methods#

addMain()#

addMain(view: Container, d: number): void;

Defined in: core/ReelAxis.ts:43

Parameters#

Parameter	Type
`view`	`Container`
`d`	`number`

Returns#

void

getCross()#

getCross(view: Container): number;

Defined in: core/ReelAxis.ts:44

Parameters#

Parameter	Type
`view`	`Container`

Returns#

number

getMain()#

getMain(view: Container): number;

Defined in: core/ReelAxis.ts:41

Parameters#

Parameter	Type
`view`	`Container`

Returns#

number

setCross()#

setCross(view: Container, v: number): void;

Defined in: core/ReelAxis.ts:45

Parameters#

Parameter	Type
`view`	`Container`
`v`	`number`

Returns#

void

setMain()#

setMain(view: Container, v: number): void;

Defined in: core/ReelAxis.ts:42

Parameters#

Parameter	Type
`view`	`Container`
`v`	`number`

Returns#

void

toLocal()#

toLocal(width: number, height: number): {
  cross: number;
  main: number;
};

Defined in: core/ReelAxis.ts:47

Screen-space (width, height) to (cross size, main size).

Parameters#

Parameter	Type
`width`	`number`
`height`	`number`

Returns#

{
  cross: number;
  main: number;
}

Name	Type	Defined in
`cross`	`number`	core/ReelAxis.ts:47
`main`	`number`	core/ReelAxis.ts:47

toScreen()#

toScreen(cross: number, main: number): {
  x: number;
  y: number;
};

Defined in: core/ReelAxis.ts:49

(cross, main) to screen-space (x, y).

Parameters#

Parameter	Type
`cross`	`number`
`main`	`number`

Returns#

{
  x: number;
  y: number;
}

Name	Type	Defined in
`x`	`number`	core/ReelAxis.ts:49
`y`	`number`	core/ReelAxis.ts:49