city.js lays the directory tree out at human scale: top-level folders
become districts separated by 18 m avenues, nested folders become
blocks with narrower streets and raised pavements, and files become
buildings whose footprint follows their lines and whose height follows
their complexity. The squarified treemap moves into city.js and is
shared with the landscape.
The renderer gains a second instance layer with per-instance kind,
code-atlas rectangle and selection flag, a helicopter camera in metres,
screen-to-world rays, and geometry lookup per mode. City mode supports
orbit, pan, dolly, ray picking, focusing a building and district names.
Node tests cover layout invariants, heights, ray/box hits and the
spatial index.
Adds camera.js with perspective, lookAt and matrix helpers. The orbit
view is now a lookAt pose feeding one view-projection matrix shared by
the shaders and project(), replacing the hand-rolled projection with
its clamped depth. A node test checks the new camera reproduces the old
projection to within 0.05 px, so the landscape looks the same; this is
the base the city's walk and fly cameras need (near plane, correct w).
Andy Dixon