Fold

Fold = object

Properties

readonly activeCorner: Point

Where the flipping page’s own origin corner sits.

readonly angle: number

Rotation of the flipping page in radians, signed by direction.

readonly bottomClip: readonly Point[]

Part of the page underneath that the fold reveals.

readonly bottomPagePosition: Point

readonly flippingClip: readonly Point[]

Visible part of the flipping page, as a polygon in page coordinates.

readonly intersections: FoldIntersections

readonly position: Point

Where the dragged corner ended up after clamping to what paper can do.

readonly progress: number

0 at rest, 100 fully turned.

readonly rect: RectPoints

Corners of the flipping page after rotation.

readonly shadow: { angle: number; start: Point; } | null

Drop-shadow origin and rotation, or null when the fold crosses no usable edges.