OQ - Gravity Toy

Version: 0.1.1
Date: 2026-04-13
Status: Executed

1. Purpose

Verify that Gravity Toy operates according to its current FS.md in a browser environment.

2. Preconditions

Gravity Toy IQ checks completed with no blocking issues
desktop browser and mobile/touch viewport available

3. OQ Test Cases

OQ ID	FS Ref	Test	Expected Result	Status
G-OQ-01	FS-01	Open `site/visuals-gravity.html`	Simulation starts with Solar System preset	Pass
G-OQ-02	FS-05, FS-06	Drag and launch a new orb	Spawn point, direction, and heavier hold behavior are visible	Pass
G-OQ-03	FS-09, FS-10	Switch each preset and press reset	Presets load correctly and reset restores the active preset	Pass
G-OQ-04	FS-11	Pause during active motion/effects, then resume	Simulation and transient effects freeze and continue cleanly	Pass
G-OQ-05	FS-12, FS-13	Observe Solar and high-energy cases	Fixed star stays anchored and escaped bodies are culled	Pass
G-OQ-06	FS-14, FS-15, FS-16, FS-17	Observe active motion and merge events	Color mapping, trails, force lines, and merge effects are visible	Pass
G-OQ-07	FS-18	Enable reduced motion and reload	Visual effects are suppressed and reduced-motion behavior matches design	Pass
G-OQ-08	FS-19, FS-20	Toggle language and load with `?lang=en`	NL/EN copy is complete and URL-driven language works	Pass
G-OQ-09	n/a	Inspect close-pair barycenter rendering	Barycenter markers remain visible, including with heavy central bodies	Pass
G-OQ-10	n/a	Open `site/visuals-gravity/docs/index.html` and linked pages	Gravity docs hub and linked HTML docs render correctly	Pass

4. Execution Record

Date executed: 2026-04-13
Environment:
- local HTTP server on http://127.0.0.1:4173/
- headless Playwright browser smoke on desktop and reduced-motion/mobile viewport
Executed checks:
- open visuals-gravity.html?lang=en
- switch from Solar System to Binary
- perform drag-to-launch interaction
- pause and resume the simulation
- open visuals-gravity/docs/index.html and oq.html
- verify reduced-motion starts paused and suppresses animated behavior path
- verify all Gravity docs URLs return 200
Result: no browser console errors observed; all listed OQ checks passed

5. Acceptance

OQ is acceptable when the visual remains interactive and legible on desktop and mobile, language switching works, reduced-motion behavior matches design intent, and the public docs set is reachable.