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Add City mode: codebase laid out as streets and buildings

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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.
This commit is contained in:
Andy Dixon
2026-05-10 15:50:23 +01:00
parent eae93d93dc
commit ae8b0a6b80
7 changed files with 462 additions and 123 deletions
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web/camera.js
+17
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@@ -55,3 +55,20 @@ export function orbitPose({ x, y, yaw, pitch, distance }, scale = 420, lift = .3
}
export const ORBIT_FOV = 2 * Math.atan(1 / 2.7);
// General 4x4 inverse (null when singular), for turning screen points back into world rays.
export function invert(m) {
const [a00, a01, a02, a03, a10, a11, a12, a13, a20, a21, a22, a23, a30, a31, a32, a33] = m;
const b00 = a00 * a11 - a01 * a10, b01 = a00 * a12 - a02 * a10, b02 = a00 * a13 - a03 * a10, b03 = a01 * a12 - a02 * a11;
const b04 = a01 * a13 - a03 * a11, b05 = a02 * a13 - a03 * a12, b06 = a20 * a31 - a21 * a30, b07 = a20 * a32 - a22 * a30;
const b08 = a20 * a33 - a23 * a30, b09 = a21 * a32 - a22 * a31, b10 = a21 * a33 - a23 * a31, b11 = a22 * a33 - a23 * a32;
let det = b00 * b11 - b01 * b10 + b02 * b09 + b03 * b08 - b04 * b07 + b05 * b06;
if (!det) return null;
det = 1 / det;
return new Float32Array([
(a11 * b11 - a12 * b10 + a13 * b09) * det, (a02 * b10 - a01 * b11 - a03 * b09) * det, (a31 * b05 - a32 * b04 + a33 * b03) * det, (a22 * b04 - a21 * b05 - a23 * b03) * det,
(a12 * b08 - a10 * b11 - a13 * b07) * det, (a00 * b11 - a02 * b08 + a03 * b07) * det, (a32 * b02 - a30 * b05 - a33 * b01) * det, (a20 * b05 - a22 * b02 + a23 * b01) * det,
(a10 * b10 - a11 * b08 + a13 * b06) * det, (a01 * b08 - a00 * b10 - a03 * b06) * det, (a30 * b04 - a31 * b02 + a33 * b00) * det, (a21 * b02 - a20 * b04 - a23 * b00) * det,
(a11 * b07 - a10 * b09 - a12 * b06) * det, (a00 * b09 - a01 * b07 + a02 * b06) * det, (a31 * b01 - a30 * b03 - a32 * b00) * det, (a20 * b03 - a21 * b01 + a22 * b00) * det,
]);
}