@motion-script/core

@motion-script/core / resolvePivotPosition

Function: resolvePivotPosition()

resolvePivotPosition<T>(descriptor, width, height): T

Defined in: render/descriptors/shape.ts:155

Fold a plain pivot + x/y into an equivalent resolved centre, so { x, y, pivot: 'topRight' } lands the top-right corner at (x, y) — the same place { topRight: { x, y } } would — instead of x/y always positioning the centre regardless of pivot. Uses the same centre = target − a · (size / 2) formula as the anchor shorthand.

Must run exactly once, on the raw author-facing descriptor, before resolveShapeAnchor ever sees it (i.e. in flipPositionY, not inside with*Descriptor, which BaseShape.resolveState calls a second time on already-resolved state — re-running this there would double the offset, since the output below is indistinguishable from a plain x/y/pivot descriptor). A no-op when an anchor shorthand is already present (validated downstream) or pivot is centre/absent.

Type Parameters

T

T extends Partial<ShapeState> & ShapeAnchorInput

Parameters

descriptor

T

width

number

height

number

Returns

T