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tiennm99
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* feat(component): similarity-scale slider controller Single-slider similarity demo for Module 2. Fixed △ABC, scaled △A'B'C' computed each frame as `centroid_target + k · (vertex − centroid_ABC)` for k ∈ [0.5, 2]. The slider's input event is the only event listener — no Pointer Events here (we're not dragging vertices in this MVP). AbortController teardown on astro:before-swap as before. The renderTicks helper is duplicated from congruence-sss.ts for now — when Module 4 lands we'll factor it out into a shared module. Premature abstraction would force a circular import structure for one helper. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com> * feat(module-2): tam giác đồng dạng (lớp 8) with scale slider Page at /lop-8/tam-giac-dong-dang/. △ABC fixed on the left at scalene scale-72.8 / 83.2 / 93.4 sides. △A'B'C' is the runtime scaled image, controlled by a single range input k ∈ [0.5, 2] step 0.05. Live readout table shows all six side lengths and all three ratios. The killer moment: drag the slider, watch all 3 ratios stay numerically equal to each other (= 1/k). That equality IS the definition of similarity, made visible. Tick marks per Decision D3: 1/2/3 ticks color-paired (#D7263D / #1B998B / #F46036). Triangle 1 ticks rendered once on mount; triangle 2 ticks redrawn on every slider input. Hub: lớp 8 card flips to live status. All 3 grade cards now active — the autoplan 3-module hero set is complete. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com> * chore: VERSION 0.0.4.0 + CHANGELOG + TODOS update v0.0.4.0 = scaffold + Module 3 (góc nội tiếp) + Module 1 (tam giác bằng nhau) + Module 2 (tam giác đồng dạng). All three MVP modules from autoplan now live. Move 2 P1 items to Completed (scale slider, ratio readout) and reduce Module 2 remaining items to P2 (free-drag mode) + P3 (numeric angle readouts). Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com> --------- Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Hình Học Sống
Interactive Vietnamese THCS (lớp 7–9) geometry visualizer. Drag the points; watch the theorems hold. Aligned to the SGK curriculum.
Sandbox repo currently doubling as a gstack trial — see
CLAUDE.md.
Status
Scaffold only (v0.0.1.0). Modules are placeholders — landing page lists three grades with "Sắp ra mắt" badges. See the design doc at ~/.gstack/projects/tiennm99-try-gstack/ for the full plan.
Develop
bun install
bun run dev # http://localhost:4321/try-gstack/
bun run test # Vitest (geom-engine unit tests)
bun run typecheck # Astro check + TS strict
bun run build # Static output to dist/
Deploy
Auto-deploys to GitHub Pages from main via actions/deploy-pages@v4. See RUNBOOK.md for rollback + domain-migration procedure.
Architecture (locked decisions, per autoplan review)
- Static: Astro SSG,
base: '/try-gstack/', outputdist/ - Typography: Be Vietnam Pro single family, weights 400/500/700, woff2 only, Vietnamese subset
- Math engine: pure
src/geom-engine/module (no DOM imports), Vitest unit tests; property tests withfast-checkto be added with first canvas module - Canvas: vanilla SVG + Pointer Events +
setPointerCapture(no Konva) — to be added with first canvas module - Math rendering: KaTeX, bundled locally + SSR-rendered — to be added with first canvas module
- Animation: Web Animations API +
requestAnimationFrame(no GSAP / Motion One / Lottie) - Analytics: Cloudflare Web Analytics, deferred until 50+ daily sessions
- i18n: every string via
t()fromsrc/i18n/vi.ts; English added by addingen.ts
License
TBD.