Faceted background

In review

Live · web

Signature surface: the one canonical faceted field (no controls)

Streaming

Nockerl · session

Faceted background

Content stays fully legible on the field. The facets are a low-contrast tonal grain, never a glow.

One codified look, composed from the shipped NockerlFacetedBackground primitive (the same field as the app-shell, the sidebar, and empty-state): a canvas per-facet tone-wave, the mesh built once per size and re-tinted every frame. Color is token-only, so it themes; changing the signature is a one-place design-system change that propagates to every app.

Code

// Web: React, consuming @dizyx/nockerl-tokens. (Web is the laggard platform;
// this is the canonical API the published @dizyx/nockerl-react package exposes.
// It re-implements the native field on a token-colored <canvas>.)
import { NockerlFacetedBackground } from '@dizyx/nockerl-react';

export function SessionStage() {
  return (
    <NockerlFacetedBackground>
      <h1>Faceted background</h1>
      <p>Content renders on the field and stays fully legible.</p>
    </NockerlFacetedBackground>
  );
}

// Android: Jetpack Compose (CANONICAL source). com.nockerl.app.chat.ui.ChatFeedBackground
// Internal composable: fills its parent and draws the faceted field behind content.
// Geometry (cell 128.dp, 18s wave, ±0.05 amplitude) is private to the file; it reads
// chatBg + canvasEdge from LocalNockerlColors, so it tracks the active palette.
import com.nockerl.app.chat.ui.ChatFeedBackground

Box {
    ChatFeedBackground(modifier = Modifier.matchParentSize())
    ChatFeed(/* messages render on the field */)
}

// macOS: SwiftUI (canonical port). NockerlVoice/UI/FacetBackground.swift
// A TimelineView(.animation) + Canvas. Takes NO parameters: it reads the window
// colorScheme and uses the same static field constants as the Compose original.
ZStack {
    FacetBackground()          // fills behind content
    DashboardContent()         // renders on the field
}

Parameters

Prop	Type	Default	Description
`reduced`	`boolean`	`false`	When true, freezes to a single composed static frame (prefers-reduced-motion). Resolved by the consumer; not a user-facing control.
`bare`	`boolean`	`false`	BARE mode: render just the full-bleed facet field with NO surface chrome (no border, radius, shadow, or 16:9 aspect). Use it for a full-bleed app-shell / stage background. The default is the bordered card-radius signature surface. The MESH + tone-wave are identical either way (one implementation); `bare` only drops the chrome. Positioned `absolute inset:0`, so the parent must be positioned.
`children`	`React.ReactNode`		Children render ON the surface (proving legibility over the live mesh).

Also accepts the native <div> attributes (e.g. onClick, disabled, id, aria-*, data-*), forwarded straight through, plus a forwarded ref.

ChatFeedBackground takes only a layout modifier; the field is configured by file-private constants and reads its colors from LocalNockerlColors. The pure geometry / tone helpers (buildFacetField, facetLuminanceDelta, shiftLuminance) are internal for testing, not a public API.

Parameter	Type	Default	Description
`modifier`	`Modifier`	`Modifier`	Layout modifier, typically `Modifier.matchParentSize()` so the field fills the content behind it.
`FACET_CELL_SIZE`	`Dp (const)`	`128.dp`	Nominal facet cell edge, kept large so the mesh reads as a few big facets.
`WAVE_PERIOD_MILLIS`	`Int (const)`	`18_000`	One full diagonal tone-wave cycle. `LinearEasing` + `RepeatMode.Restart` (a full sine wraps seamlessly).
`WAVE_AMPLITUDE`	`Float (const)`	`0.05f`	Peak luminance swing the wave adds to a facet. Small by design (low-contrast, calm).
`STATIC_FACET_JITTER`	`Float (const)`	`0.022f`	Baked per-facet luminance grain (± this fraction), deterministic so the field never shimmers.

FacetBackground is a parameterless View. It reads @Environment(\.colorScheme) and uses the same static field constants as the Compose original; the base tone comes from NockerlTheme.facetBaseDark / facetBaseLight.

Style	Type	Default	Description
`cell`	`CGFloat (static)`	`130`	Nominal facet cell edge (Compose uses 128.dp).
`jitterFraction`	`CGFloat (static)`	`0.34`	How far an interior grid point may stray from its lattice slot. Edge points are not jittered, so the field meets the bounds cleanly.
`amplitude`	`Double (static)`	`0.05`	Peak tone-wave luminance swing, matching the Compose `WAVE_AMPLITUDE`.
`staticJitter`	`Double (static)`	`0.022`	Baked per-facet tonal grain.
`periodSeconds`	`Double (static)`	`18.0`	One full diagonal wave cycle, driven by `TimelineView(.animation)`.

Cross-platform drift (this surface lives natively in Voice + Android)

The faceted field is canonical on Android (ChatFeedBackground.kt, behind the chat feed) and a faithful Swift port in Voice (FacetBackground.swift). Web is derived: the demo re-implements the exact same mesh on a token-colored <canvas>. Honest divergences:

Configurability: all three surfaces are intentionally fixed. The field is a single codified standard, not user-configurable (no intensity / density / speed / tint knobs and no surface variants on any platform). Geometry is private; only Compose exposes a modifier for placement.
Cell size: Compose 128.dp vs Swift 130, a small unreconciled constant.
Edge hairline: Compose canvasEdge @ 0.05, Swift white @ 0.06. Both should resolve to one canvas-edge token at one alpha.
Base tone: both read the chat-bg token (#181B20 dark); the per-facet shift is a neutral per-channel luminance add (no hue, no glow) on all three.