Press n or j to go to the next uncovered block, b, p or k for the previous block.
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* √2 Demo Narration Segments: "The Magic Shortcut"
*
* 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 sqrt2Demo.ts's phase constants:
*
* Seg 0 0.00–0.10 The journey starts — dot at zero
* Seg 1 0.10–0.25 The long path — draw the square, walk two sides
* Seg 2 0.25–0.35 The shortcut — diagonal appears
* Seg 3 0.35–0.50 Measuring — compass rotation to number line
* Seg 4 0.50–0.60 The mystery spot — lands between 1 and 2
* Seg 5 0.60–0.80 Why it's that long — area squares proof
* Seg 6 0.80–0.92 The never-ending number — zoom in on decimals
* Seg 7 0.92–1.00 The reveal — √2 label
*/
import type { DemoNarrationSegment } from './useConstantDemoNarration'
/** Shared voice direction for the √2 demo narrator. */
export const SQRT2_DEMO_TONE =
'You are a warm, adventurous guide for a really smart 5-year-old. ' +
'Ground everything in shortcuts, paths, and exploring squares. ' +
'Build mystery and excitement about the diagonal. ' +
'Be genuinely amazed when the number never ends.'
export const SQRT2_DEMO_SEGMENTS: DemoNarrationSegment[] = [
// ── The journey starts ──────────────────────────────────────────
{
ttsText: "Let's go on a journey! " + 'We start right here, at zero on the number line.',
startProgress: 0.0,
endProgress: 0.1,
animationDurationMs: 4000,
scrubberLabel: 'Starting at zero',
},
// ── The long path ───────────────────────────────────────────────
{
ttsText:
'To get to the far corner, we can take the long way. ' +
'One step over... and one step up! ' +
"That's two steps total.",
startProgress: 0.1,
endProgress: 0.25,
animationDurationMs: 6000,
scrubberLabel: 'The long way',
},
// ── The shortcut ────────────────────────────────────────────────
{
ttsText: 'But wait — what if we take a shortcut? ' + 'We can cut right across the middle!',
startProgress: 0.25,
endProgress: 0.35,
animationDurationMs: 5000,
scrubberLabel: 'The shortcut',
},
// ── Measuring the shortcut ──────────────────────────────────────
{
ttsText:
"Let's see exactly how long the shortcut is. " +
"We'll swing it down onto our number line, like a compass.",
startProgress: 0.35,
endProgress: 0.5,
animationDurationMs: 6000,
scrubberLabel: 'Measuring it',
},
// ── The mystery spot ────────────────────────────────────────────
{
ttsText:
"It landed here! It's longer than one, but shorter than two. " +
'What is this mystery number?',
startProgress: 0.5,
endProgress: 0.6,
animationDurationMs: 5000,
scrubberLabel: 'Mystery number',
},
// ── Why it's that long ──────────────────────────────────────────
{
ttsText:
"Here's the magic! Each side of the square has a little box with an area of one. " +
'The shortcut has a bigger box. And guess what? ' +
'The two small boxes perfectly fill the big one! Its area is two!',
startProgress: 0.6,
endProgress: 0.8,
animationDurationMs: 8000,
scrubberLabel: 'Area proof',
},
// ── The never-ending number ─────────────────────────────────────
{
ttsText:
"If we zoom in really close, it's past one point four. " +
'Even closer — past one point four one four! ' +
"The numbers keep going and never, ever stop. It's a truly special number!",
startProgress: 0.8,
endProgress: 0.92,
animationDurationMs: 6000,
scrubberLabel: 'Digits go forever',
},
// ── The reveal ──────────────────────────────────────────────────
{
ttsText:
'This magic length is called the square root of two. ' +
"It's the exact length of every square's shortcut, " +
'and it shows up everywhere in math and nature!',
startProgress: 0.92,
endProgress: 1.0,
animationDurationMs: 6000,
scrubberLabel: 'Square root of two',
},
]
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