import type { Fn3 , Fn4 , FnN , FnU3 } from "@thi.ng/api" ; import { DEFAULT , defmulti } from "@thi.ng/defmulti/defmulti" ; import { clamp01 } from "@thi.ng/math/interval" ; import { fract } from "@thi.ng/math/prec" ; import type { IRandom } from "@thi.ng/random" ; import { SYSTEM } from "@thi.ng/random/system" ; import { setC4 } from "@thi.ng/vectors/setc" ; import type { Color , ReadonlyColor , TypedColor } from "./api.js" ; import { __dispatch1 } from "./internal/dispatch.js" ; import { __ensureAlpha } from "./internal/ensure.js" ; internal const analogU = ( x , delta , rnd ) => delta !== 0 ? x + rnd . norm ( delta ) : x ; internal const analogN = ( x , delta , rnd , post = clamp01 ) => delta !== 0 ? post ( x + rnd . norm ( delta ) ) : x ; internal const analogH = ( x , delta , rnd ) => analogN ( x , delta , rnd , fract ) ; internal const analogA = ( a , delta , rnd ) => delta !== 0 ? clamp01 ( ( a !== undefined ? a : 1 ) + rnd . norm ( delta ) ) : __ensureAlpha ( a ) ; export const defAnalog = ( x , y , z ) => ( out , src , delta , rnd = SYSTEM ) => setC4 ( out || src , x ( src [ 0 ] , delta , rnd ) , y ( src [ 1 ] , delta , rnd ) , z ( src [ 2 ] , delta , rnd ) , __ensureAlpha ( src [ 3 ] ) ) ; internal const analogHNN = defAnalog ( analogH , analogN , analogN ) ; internal const analogNNN = defAnalog ( analogN , analogN , analogN ) ; internal const analogNUU = defAnalog ( analogN , analogU , analogU ) ; /**
 * Returns a random analog color based on given `src` color and variance
 * `delta`. Each channel will be randomized by +/- `delta`, optionally using
 * provided  {@link @thi.ng/random#IRandom} PRNG.
  export const analog = defmulti < Color | null , TypedColor < any > , number , IRandom | undefined , Color > ( __dispatch1 , { } , { hcy : analogHNN , hsi : analogHNN , hsl : analogHNN , hsv : analogHNN , lab50 : analogNUU , lab65 : analogNUU , lch : defAnalog ( analogN , analogN , analogH ) , ycc : analogNUU , [ DEFAULT ] : analogNNN , } ) ; /**
 * Similar to  analogRGB . Returns an analog color based on given HSVA
 * color, with each channel randomly varied by given channel-specific delta
 * amounts (and optionally given  {@link @thi.ng/random#IRandom} PRNG).
 *
 *  remarks This function provides more user control than  analog , but the latter
 * is recommended for most use cases.
 *
 * By default (unless `deltaS`, `deltaV`, `deltaA` are provided) only the hue of
 * the color will be modulated.
 *
 *  param out param src param deltaH param deltaS param deltaV param deltaA param rnd export const analogHsv = ( out , src , deltaH , deltaS = 0 , deltaV = 0 , deltaA = 0 , rnd = SYSTEM ) => setC4 ( out || src , analogN ( src [ 0 ] , deltaH , rnd , fract ) , analogN ( src [ 1 ] , deltaS , rnd ) , analogN ( src [ 2 ] , deltaV , rnd ) , analogA ( src [ 3 ] , deltaA , rnd ) ) ; /**
 * Similar to  analogHSV . Returns an analog color based on given RGBA
 * color, with each channel randomly varied by given delta amounts (and
 * optionally given  {@link @thi.ng/random#IRandom} PRNG).
 *
 *  remarks param out param src param deltaR param deltaG param deltaB param deltaA param rnd export const analogRgb = ( out , src , deltaR , deltaG = deltaR , deltaB = deltaR , deltaA = 0 , rnd = SYSTEM ) => setC4 ( out || src , analogN ( src [ 0 ] , deltaR , rnd ) , analogN ( src [ 1 ] , deltaG , rnd ) , analogN ( src [ 2 ] , deltaB , rnd ) , analogA ( src [ 3 ] , deltaA , rnd ) ) ;