GalaxyJS 3.3.0 "Deep Field" — a zero-dependency WebGL2 tier + 20 animations (60 → 80)

[Edwson]

A WebGL2 tier, still zero dependencies

Canvas 2D remains the default renderer and the fallback. registerAnimation now accepts renderer: "webgl2", and a new registerShader(name, { defaults, uniforms, fragment }) helper compiles a full-screen fragment shader and hands it the same lifecycle every 2D animation already gets:

• DPR-clamped ResizeObserver sizing
• pointer input as uMouse (xy in device pixels, y-up, z = inside)
• IntersectionObserver suspension while off-screen
• one still frame under prefers-reduced-motion
• uniform declarations generated from the arity of the values passed in, so changing an option never recompiles

Geometry is a single full-screen triangle derived from gl_VertexID — no vertex buffer is allocated and nothing leaks. When a browser cannot supply a WebGL2 context, glPosterFallback paints a static 2D poster from the animation's own palette rather than leaving an empty canvas.

20 new animations (60 → 80)

Group	Animations
Relativistic & gravitational	lensing (Schwarzschild deflection + Einstein ring), accretionDisk (Doppler beaming + gravitational redshift), nBody, tidalStream, inspiral
Volumetric & raymarched (WebGL2)	volumetricNebula (Beer–Lambert + Henyey–Greenstein), starSurface (granulation, limb darkening, prominences), atmosphere (Rayleigh + Mie), dustLanes (self-shadowed), protoplanetary
Instruments	spectrograph, transitCurve, waterfall, hrDiagram, pulsarTiming
Pointer-driven & generative	gravityWell, nebulaPaint, solarWind, starForge, relativisticJets

Changed

• galaxy.d.ts declares all 80 names in AnimationType.
• Expected counts in every test now derive from the generated manifest. test.mjs and test-mcp.mjs asserted the literal 60 in four places, which fails on every addition and trains you to bump the number instead of reading the failure. A >= 80 floor still catches accidental deletion.
• New WebGL2 lifecycle contract in test.mjs: registerShader present, a WebGL2 context requested, a 2D fallback available, and an assertion that the library never force-loses a WebGL context — a canvas returns the same context object on every getContext, so losing it would poison any later mount on that canvas.
• Demo gallery and index.html version/cache-bust strings updated; galaxy.min.js rebuilt (157.2 kB, 52.1 kB gzip).

Verification

Every one of the 20 was rendered in a real browser (headless Chromium) and inspected, not just compiled. A harness reported blank / blown-out / not-actually-animating per animation with pixel statistics and screenshots. Four real bugs were found and fixed that way — including solarWind, whose particles were launched upstream of a cull box that destroyed them on their first frame, so the scene silently froze.

node test.mjs and node test-mcp.mjs pass; the manifest regenerates with no drift.