Epic 5 Phase 1 — form is a mesh, actors have parity with SDF
meshes.js now mirrors shader-contract.js verbatim:
- jsCastSDF rotates by -tilt (matching GLSL column-major mat2), hollow
excluded during outer-radius search so annular SDFs sample correctly,
radial search probes without hollow then punches hole separately.
- castShape samples 64 segments, inner hole scaled by hollow width.
- formToGeometry uses formDepth (u_formDepth = r.z*depth half-extent),
capsule h correctly half-height, sphere as scaled unit sphere, prism
extruded with proper halfDepth and centered; bevel thickness from
part.round.
- actorToGeometry preserves per-part op/blend userData, uses YXZ Euler
for yaw/pitch (matches formRot), mirrors radial/mirror/stack symmetry
exactly as shader formFold does.
Shared camera wired live: Show.renderFrame drives
Compositor.updateSharedCamera from ArcDriver framing/personality/time
and injects sharedCamera into each active ModelLayer — pure f(frame,look)
so seek === playback. ArcDriver exposes framingForFrame helper.
Gates: lint 107 clean / 70 literals / 68 scenes green; vite build
294 modules; deterministic actor geometry smoke-tested (same seed same
vert count, hollow handling, fallback).
Co-Authored-By: Claude <noreply@anthropic.com>
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