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* γ Demo Narration Segments: "The Sharing Slide"
*
* Pure data file — no React. Each segment maps a revealProgress range
* to a TTS utterance and a minimum animation duration.
*
* Progress ranges are derived from gammaDemo.ts's PHASE constants:
*
* Seg 0 0.00–0.10 One friend, one whole cookie
* Seg 1 0.10–0.20 Two friends share
* Seg 2 0.20–0.34 Three friends + "what about in-between?"
* Seg 3 0.34–0.48 The sharing slide emerges
* Seg 4 0.48–0.57 Highlight the extra bits (crescents)
* Seg 5 0.57–0.65 Rapid cascade of more friends
* Seg 6 0.65–0.86 Collect the crescents into the gamma bar
* Seg 7 0.86–1.00 The reveal of gamma
*/
import type { DemoNarrationSegment } from './useConstantDemoNarration'
/** Shared voice direction for the γ demo narrator. */
export const GAMMA_DEMO_TONE =
'You are a warm, playful math guide for a really smart 5-year-old. ' +
'Ground everything in sharing cookies and playground slides. ' +
'Build wonder gradually — start simple, let curiosity grow. ' +
'Be genuinely amazed when the extras converge.'
export const GAMMA_DEMO_SEGMENTS: DemoNarrationSegment[] = [
// ── One friend ──────────────────────────────────────────────────
{
ttsText:
'Imagine sharing a yummy cookie! ' +
"If there's just one friend, they get the whole thing. " +
'One friend, one whole cookie!',
startProgress: 0.0,
endProgress: 0.1,
animationDurationMs: 5000,
scrubberLabel: 'One whole cookie',
},
// ── Two friends ─────────────────────────────────────────────────
{
ttsText:
'Now two friends want to share. ' +
'Each one gets half — see how the step is shorter? ' +
'More friends means smaller pieces!',
startProgress: 0.1,
endProgress: 0.2,
animationDurationMs: 5500,
scrubberLabel: 'Two friends share',
},
// ── Three friends + the question ────────────────────────────────
{
ttsText:
'With three friends, each gets a third. ' +
'But wait — what about one-and-a-half friends? ' +
'Or two-and-a-quarter? What if sharing could be perfectly smooth?',
startProgress: 0.2,
endProgress: 0.34,
animationDurationMs: 7000,
scrubberLabel: 'Three friends',
},
// ── The slide emerges ───────────────────────────────────────────
{
ttsText:
'This is the sharing slide! ' +
'It shows the perfect share for any number of friends. ' +
'Smooth and gentle, just like a playground slide — steep at the top, gentle at the bottom.',
startProgress: 0.34,
endProgress: 0.48,
animationDurationMs: 7000,
scrubberLabel: 'The sharing slide',
},
// ── The extra bits ──────────────────────────────────────────────
{
ttsText:
'See those golden bits? ' +
'The blocky steps are always a teeny bit taller than the smooth slide. ' +
'Each step pokes up just a little!',
startProgress: 0.48,
endProgress: 0.57,
animationDurationMs: 5500,
scrubberLabel: 'The extra bits',
},
// ── Rapid cascade ───────────────────────────────────────────────
{
ttsText:
'More friends means tinier extras. ' +
'Four friends, five, six, seven, eight, nine, ten! ' +
'The extras get tinier and tinier.',
startProgress: 0.57,
endProgress: 0.65,
animationDurationMs: 5000,
scrubberLabel: 'More friends',
},
// ── Collection ──────────────────────────────────────────────────
{
ttsText:
"Now let's collect all those little extra bits and line them up! " +
'The big ones go first, then the smaller ones. ' +
'See how the bar grows fast at first, then slower and slower?',
startProgress: 0.65,
endProgress: 0.86,
animationDurationMs: 8000,
scrubberLabel: 'Collecting extras',
},
// ── The reveal ──────────────────────────────────────────────────
{
ttsText:
'All those tiny extras add up to a very special number. ' +
'Mathematicians call it gamma! ' +
"It's about zero point five seven seven, and it pops up all over mathematics — " +
'whenever sharing and smoothness play together.',
startProgress: 0.86,
endProgress: 1.0,
animationDurationMs: 7000,
scrubberLabel: "It's gamma!",
},
]
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