pixi-silk/ui/arc

Angle maths for ring widgets: angleDelta, wrapAngle, snapTo, rubberBand.

import { AngleAccumulator, TAU, angleDelta, clamp } from 'pixi-silk/ui/arc';

Classes#

Class	Description
AngleAccumulator	Follows a pointer around a centre and counts full turns, so dragging past the seam keeps adding up instead of jumping back by a turn. `total` is the angle travelled since `reset`.

Variable	Description
TAU	A full turn in radians, `2 * Math.PI`.

Function	Description
angleDelta	Signed shortest turn from `b` to `a`, in -PI..PI radians. Inputs can be any size.
clamp	Clamps `v` to `min..max`. Expects `min <= max`.
rubberBand	Soft limit: inside `min..max` the value passes through, past a limit it keeps moving but slows down and never goes further than `limit` beyond it (the rubber band of scroll views). A `limit` of 0 or less is a hard clamp.
snapTo	Rounds `value` to the nearest `origin + k * step`. A `step` of 0 or less returns `value` unchanged.
wrapAngle	Wraps an angle of any size into 0..TAU radians.