import Animated , { block , defined } from "react-native-reanimated" ; import { clamp , max , min } from "./Math" ; import type { Matrix3 , Transforms2d } from "./Matrix3" ; import { decompose2d } from "./Matrix3" ; const { Value , set , add , multiply , cond , eq , abs , sub , not , lessThan , greaterThan , divide , modulo , proc , } = Animated ; export type SpringConfig = Partial < Omit < Animated . SpringConfig , "toValue" > > ; export type TimingConfig = Partial < Omit < Animated . TimingConfig , "toValue" > > ; export const mix = proc ( ( value , x , y ) => add ( x , multiply ( value , sub ( y , x ) ) ) ) ; export const step = proc ( ( value , edge ) => lessThan ( value , edge ) ) ; export const smoothstep = proc ( ( value , edge0 , edge1 ) => { const t = clamp ( divide ( sub ( value , edge0 ) , sub ( edge1 , edge0 ) ) , 0 , 1 ) ; return multiply ( t , t , sub ( 3 , multiply ( 2 , t ) ) ) ; } ) ; export const tween2d = ( value , t1 , t2 ) => { const d1 = decompose2d ( t1 ) ; const d2 = decompose2d ( t2 ) ; const translateX = mix ( value , d1 [ 0 ] . translateX , d2 [ 0 ] . translateX ) ; const translateY = mix ( value , d1 [ 1 ] . translateY , d2 [ 1 ] . translateY ) ; const skewX = mix ( value , d1 [ 2 ] . rotateZ , d2 [ 2 ] . rotateZ ) ; const scaleX = mix ( value , d1 [ 3 ] . scaleX , d2 [ 3 ] . scaleX ) ; const scaleY = mix ( value , d1 [ 4 ] . scaleY , d2 [ 4 ] . scaleY ) ; const rotateZ = mix ( value , d1 [ 5 ] . rotateZ , d2 [ 5 ] . rotateZ ) ; return [ { translateX } , { translateY } , { rotateZ : skewX } , { scaleX } , { scaleY } , { rotateZ } , ] as const ; } ; export const diff = ( v ) => { const stash = new Value ( 0 ) ; const prev = new Value < number > ( ) ; return block ( [ set ( stash , cond ( defined ( prev ) , sub ( v , prev ) , 0 ) ) , set ( prev , v ) , stash , ] ) ; } ; export const diffClamp = ( a , minVal , maxVal ) => { const value = new Value < number > ( ) ; return set ( value , min ( max ( add ( cond ( defined ( value ) , value , a ) , diff ( a ) ) , minVal ) , maxVal ) ) ; } ; export const moving = ( position , minPositionDelta = 1e-3 , emptyFrameThreshold = 5 ) => { const delta = diff ( position ) ; const noMovementFrames = new Value ( 0 ) ; return cond ( lessThan ( abs ( delta ) , minPositionDelta ) , [ set ( noMovementFrames , add ( noMovementFrames , 1 ) ) , not ( greaterThan ( noMovementFrames , emptyFrameThreshold ) ) , ] , [ set ( noMovementFrames , 0 ) , 1 ] ) ; } ; export const snapPoint = ( value , velocity , points ) => { const point = add ( value , multiply ( 0.2 , velocity ) ) ; const diffPoint = ( p ) => abs ( sub ( point , p ) ) ; const deltas = points . map ( ( p ) => diffPoint ( p ) ) ; const minDelta = min ( ... deltas ) ; return points . reduce ( ( acc , p ) => cond ( eq ( diffPoint ( p ) , minDelta ) , p , acc ) , new Value ( ) ) as Animated . Node < number > ; } ; export const addTo = proc ( ( value , node ) => set ( value , add ( value , node ) ) ) ; export const subTo = proc ( ( value , node ) => set ( value , sub ( value , node ) ) ) ; export const multiplyTo = proc ( ( value , node ) => set ( value , multiply ( value , node ) ) ) ; export const divideTo = proc ( ( value , node ) => set ( value , divide ( value , node ) ) ) ; export const moduloTo = proc ( ( value , node ) => set ( value , modulo ( value , node ) ) ) ;