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refactor(street-level): drop FOLLOW and Google 3D ground casting

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FOLLOW is gone: no setFollow, follow state, map-stack availability or
handoff listener. Opening a photo still frames it with one flight through
the application's deferred navigation (begin/reassert), so a slow photo
never overrides newer navigation and tracking is released as before.

Ground casting is gone: groundCast.js, meshSampler.js, the surface mode,
the draped-to-cast swap and remesh. Coverage lines are always draped
GroundPolylinePrimitives (ClassificationType.BOTH); cones and the marker
clamp to the ground and keep the horizon cull. The terrain/meshFloor/ground
services and meshFloor.visibleTilesetLoaded are no longer needed.

Co-Authored-By: Claude Opus 5.5 <[email protected]>
This commit is contained in:
German KhokhlovandClaude Opus 5.5 committed 2026-10-07 21:59:15 +04:00
1 parent 7dec7883aa
commit 0f41fb04cd
37 files changed
+430 -3323
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src/layers/streetLevel/marker.test.mjs
+11 -104
View File
@@ -2,7 +2,6 @@ import assert from 'node:assert/strict';
import test from 'node:test';
import * as Cesium from 'cesium';
import { createMarker } from './marker.js';
import { GROUND_CAST_LIFT_M, MESH_LIFT_M } from './groundCast.js';
// The marker glyph draws on a canvas; Node has none, so drawing is a no-op.
const noop = () => {};
@@ -12,7 +11,7 @@ globalThis.document ??= {
};
/** A viewer whose camera is 20,000 km over `view`, and its pre-render listeners. */
function setup({ parts = {}, surface = 'draped' } = {}) {
function setup() {
const view = { lon: -121.49, lat: 38.58, height: 20_000_000 };
const preRender = new Set();
const viewer = {
@@ -34,7 +33,6 @@ function setup({ parts = {}, surface = 'draped' } = {}) {
const state = {
services: {},
viewer,
surface,
marker: {
// Stands in for the billboard collection; ensure() keeps it.
collection: {
@@ -45,7 +43,7 @@ function setup({ parts = {}, surface = 'draped' } = {}) {
billboard: null,
},
};
const marker = createMarker({ state, parts });
const marker = createMarker({ state });
const frame = () => {
for (const listener of [...preRender]) listener();
};
@@ -78,112 +76,21 @@ test('destroying the marker stops the horizon cull', () => {
assert.equal(preRender.size, 0);
});
/**
* Bare earth from a ground caster (null until its cell is fetched) and the
* sampled Google 3D surface from a mesh sampler (undefined until sampled).
*/
function terrainParts({ dem = null, mesh } = {}) {
const ground = { dem, prepares: [] };
const sampler = { mesh, requests: [], listeners: [] };
return {
ground,
sampler,
parts: {
groundCaster: {
groundAt: () => ground.dem,
prepare(points) {
let resolve;
const promise = new Promise((done) => {
resolve = done;
});
ground.prepares.push({ points, resolve });
return promise;
},
},
meshSampler: {
meshAt: () => sampler.mesh,
request: (points) => sampler.requests.push(points),
onSampled: (listener) => sampler.listeners.push(listener),
},
},
};
}
const heightOf = (billboard) =>
Cesium.Cartographic.fromCartesian(billboard.position).height;
const SPOT = { lon: -121.49, lat: 38.58 };
test('in terrain mode the marker stands on the sampled road surface (mesh near bare earth)', () => {
const { parts } = terrainParts({ dem: 10, mesh: 11.5 });
const { state, marker } = setup({ parts, surface: 'terrain' });
marker.set(SPOT, 45);
const billboard = state.marker.billboard;
assert.equal(billboard.heightReference, Cesium.HeightReference.NONE);
assert.ok(
Math.abs(heightOf(billboard) - (11.5 + MESH_LIFT_M)) < 1e-3,
`height ${heightOf(billboard)}`,
);
});
test('in terrain mode without a mesh sample the marker stands on bare earth and asks for one', () => {
const { parts, sampler } = terrainParts({ dem: 10 });
const { state, marker } = setup({ parts, surface: 'terrain' });
marker.set(SPOT, 45);
const billboard = state.marker.billboard;
assert.equal(billboard.heightReference, Cesium.HeightReference.NONE);
assert.ok(
Math.abs(heightOf(billboard) - (10 + GROUND_CAST_LIFT_M)) < 1e-3,
`height ${heightOf(billboard)}`,
);
assert.deepEqual(sampler.requests, [[[SPOT.lon, SPOT.lat]]]);
// The sample lands: the marker moves onto the road surface.
sampler.mesh = 10.5;
for (const listener of sampler.listeners) listener();
assert.ok(Math.abs(heightOf(billboard) - (10.5 + MESH_LIFT_M)) < 1e-3);
});
test('in terrain mode with no ground yet the marker clamps, then stands up once the ground arrives', async () => {
const { parts, ground } = terrainParts({ mesh: 11 });
const { state, marker } = setup({ parts, surface: 'terrain' });
test('the marker is clamped to the ground and turned to the bearing', () => {
const { state, marker } = setup();
marker.set(SPOT, 45);
const billboard = state.marker.billboard;
assert.equal(
billboard.heightReference,
Cesium.HeightReference.CLAMP_TO_GROUND,
);
assert.deepEqual(ground.prepares[0].points, [[SPOT.lon, SPOT.lat]]);
ground.dem = 10;
ground.prepares[0].resolve(true);
await new Promise((resolve) => setTimeout(resolve, 0));
assert.equal(billboard.heightReference, Cesium.HeightReference.NONE);
assert.ok(Math.abs(heightOf(billboard) - (11 + MESH_LIFT_M)) < 1e-3);
assert.equal(billboard.rotation, -Cesium.Math.toRadians(45), 'bearing kept');
});
test('ground that arrives after the marker moved on does not move it back', async () => {
const { parts, ground } = terrainParts();
const { state, marker } = setup({ parts, surface: 'terrain' });
marker.set(SPOT, 0);
const elsewhere = { lon: -121.5, lat: 38.6 };
marker.set(elsewhere, 0);
ground.dem = 10;
ground.prepares[0].resolve(true);
await new Promise((resolve) => setTimeout(resolve, 0));
const placed = Cesium.Cartographic.fromCartesian(
state.marker.billboard.position,
);
assert.ok(
Math.abs(Cesium.Math.toDegrees(placed.longitude) - elsewhere.lon) < 1e-9,
);
});
test('draped mode clamps the marker to the globe whatever the ground says', () => {
const { parts, ground } = terrainParts({ dem: 10, mesh: 11 });
const { state, marker } = setup({ parts, surface: 'draped' });
marker.set(SPOT, 0);
assert.equal(
state.marker.billboard.heightReference,
Cesium.HeightReference.CLAMP_TO_GROUND,
);
assert.equal(ground.prepares.length, 0);
assert.equal(billboard.rotation, -Cesium.Math.toRadians(45));
// Moving it keeps the same billboard.
marker.set({ lon: -121.5, lat: 38.6 }, 90);
assert.equal(state.marker.billboard, billboard);
const placed = Cesium.Cartographic.fromCartesian(billboard.position);
assert.ok(Math.abs(Cesium.Math.toDegrees(placed.longitude) + 121.5) < 1e-9);
assert.equal(billboard.rotation, -Cesium.Math.toRadians(90));
});