feat: scale-true drill-down — the section never rescales - #9
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Each node keeps the rect/depth/tier it was first laid out at (VNode.home); a drilled-in scope is laid out there instead of re-mapped to the full stage, so heights, footprints and terrace altitude read the same at every level and the homing transition has nothing to scale. A legibility floor enlarges only scopes too small to place their children. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
A drilled scope whose root was never laid out (a module made on the spot by a double-click, a file stripped for being too small) fell back to the whole CITY_SIZE rect — a 900-unit pancake. It now lands on a floor-sized square at its nearest placed ancestor. The legibility floor measures the home's short side, so a skinny plot is widened too, and label culling is relative to the stage instead of a fixed 3 units. Folders too deep for a terrace sign no longer count as signed, so they keep their label pill. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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Stacked on #8.
Drilling in used to re-map the subtree to the full 900-unit stage, so footprints inflated while heights stayed absolute: a district read as a pancake, and the homing transition had to scale it up around the anchor. Now each node keeps the rect/depth/tier it was first laid out at (
VNode.home) and a drilled-in scope is laid out at that home. Everything lands where it already stood; only the surroundings go away and the camera closes in.layoutCity(root, { at })places the root at a given rect/depth/tier;layoutNoderecords first placement.scopeHome()resolves the home of the (possibly synthetic) scope root;stageFloor()is the only exception — scopes too small to place their children are enlarged about their centre (real foldersmax(48, √files·6), file/module scopes keep the oldmax(60, √buildings·55)).kis now 1 in the common case; the old city fading over the identical new one is invisible.Before / after isolating
packages/canvas/.../hooks(58 files): the old version stretched it to a flat plate; the new one keeps its towers.Known trade-offs (recorded in DESIGN.md "Scale-true drill-down"):
Verification:
npm run typecheck; motion probe passes (0% viewport jump on every rebuild frame, skyline cleared, no polar backtrack).🤖 Generated with Claude Code