Function createColors

packages/arctic/src/cli/cmd/tui/ui/spinner.ts:336–368

(options: KnightRiderOptions = {})

 * @returns ColorGenerator function
 */
export function createColors(options: KnightRiderOptions = {}): ColorGenerator {
  const holdStart = options.holdStart ?? 30
  const holdEnd = options.holdEnd ?? 9

  const colors =
    options.colors ??
    (options.color
      ? deriveTrailColors(options.color, options.trailSteps)
      : [
          RGBA.fromHex("#ff0000"), // Brightest Red (Center)
          RGBA.fromHex("#ff5555"), // Glare/Bloom
          RGBA.fromHex("#dd0000"), // Trail 1
          RGBA.fromHex("#aa0000"), // Trail 2
          RGBA.fromHex("#770000"), // Trail 3
          RGBA.fromHex("#440000"), // Trail 4
        ])

  const defaultColor =
    options.defaultColor ??
    (options.color ? deriveInactiveColor(options.color, options.inactiveFactor) : RGBA.fromHex("#330000"))

  const trailOptions = {
    colors,
    trailLength: colors.length,
    defaultColor,
    direction: "bidirectional" as const,
    holdFrames: { start: holdStart, end: holdEnd },
    enableFading: options.enableFading,
    minAlpha: options.minAlpha,
  }

  return createKnightRiderTrail(trailOptions)
}