Documented standard stack (vanilla JS, HTML5 Canvas), architecture patterns (extend Physics for paddle2, add AI module, score detection at GameLoop level), common pitfalls (tunneling, AI balance, input lag, memory leaks), and validation architecture for Phase 2 requirements. Verified with locked decisions from CONTEXT.md and prior phase research. Ready for planning.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
- Add GameConfig with initialBallSpeed (220px/s), speedIncrement (18px/s), paddleSpeed (400px/s)
- Add Physics.serveBall(): centers ball, sets random angle (-45 to +45 deg), random left/right dir
- Replace Physics.update() skeleton with full ball movement and wall bounce logic
- Add Physics._checkPaddleCollision() with 5-zone angle deflection and speed increment per hit
- Ball exits left/right bounds → immediate re-serve from center
- Ball pushed out of paddle on collision to prevent double-hit next frame
- Add on-canvas speed debug display (Phase 1 verification aid)
- Created 01-01-SUMMARY.md documenting objects built, decisions, patterns
- Updated STATE.md: position advanced to plan 2/2 in Phase 1
- Updated ROADMAP.md: Phase 1 plan 1/2 complete (in progress)
- Marked CORE-07 and VFX-05 requirements as complete in REQUIREMENTS.md
- Created index.html with valid HTML5 structure and black full-window canvas
- Renderer object with devicePixelRatio-aware resize() using logical vs bitmap coords
- CSS enforces overflow:hidden with no scrollbars
- Minimum 4:3 aspect ratio enforcement in resize logic
- window.addEventListener('resize') handler for live canvas rescaling
Synthesized 4 parallel research efforts into comprehensive SUMMARY.md:
- STACK.md: Vanilla Canvas 2D, fixed timestep, Web Audio, no dependencies
- FEATURES.md: MVP features + v1.x enhancements + defer list
- ARCHITECTURE.md: Game loop + state machine + entity patterns, 10-phase build order
- PITFALLS.md: 8 critical pitfalls with prevention strategies
Key recommendations:
- Use fixed timestep accumulator (60 Hz physics, variable rendering)
- Implement 10 phases from game loop foundation to cross-browser testing
- Address critical pitfalls early (tunneling, timing, DPI, autoplay, AI, power-ups, lag, memory)
- MVP ships with core Pong + AI + menus + basic polish
- v1.x adds particles, trails, power-ups, arenas
All research backed by official sources (MDN, web.dev, Chrome docs) and established patterns.
Confidence: HIGH. Ready for requirements definition.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
