Initial commit: browser OSM city generator
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// Просмотрщик мира: камера (перетаскивание, колесо, щипок), этажи, выбор здания.
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import type { Building, Vec, World } from '../types';
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import { Renderer, type Camera, type ViewOpts } from './renderer';
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import { KIND_NAME, ROOM_NAME } from './style';
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import { centroid } from '../util/geom';
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const el = <K extends keyof HTMLElementTagNameMap>(tag: K, cls?: string, html?: string) => {
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const e = document.createElement(tag);
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if (cls) e.className = cls;
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if (html !== undefined) e.innerHTML = html;
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return e;
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};
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const esc = (s: string) => s.replace(/[&<>"]/g, (c) => ({ '&': '&', '<': '<', '>': '>', '"': '"' }[c]!));
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export class Viewer {
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readonly root = el('div', 'viewer');
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private canvas = el('canvas', 'world-canvas');
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private ctx = this.canvas.getContext('2d')!;
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private renderer: Renderer;
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cam: Camera;
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opts: ViewOpts = { floor: null, overrides: new Map(), selected: null, furniture: true, labels: true };
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private raf = 0;
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private floorBar = el('div', 'floor-bar card');
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private info = el('div', 'info card');
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private scale = el('div', 'scale');
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private maxLevel: number;
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private pointers = new Map<number, { x: number; y: number }>();
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private gesture: { x: number; y: number; cam: Camera; d?: number; moved: boolean } | null = null;
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constructor(parent: HTMLElement, public world: World, private actions: { onNew: () => void; onExport: () => void }) {
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this.renderer = new Renderer(world);
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const B = world.bounds;
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this.cam = { x: (B.minX + B.maxX) / 2, y: (B.minY + B.maxY) / 2, z: 1 };
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this.maxLevel = Math.min(40, Math.max(1, ...world.buildings.map((b) => b.levels)));
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this.root.append(this.canvas, this.buildTop(), this.floorBar, this.info, this.scale, el('div', 'attribution', '© <a href="https://www.openstreetmap.org/copyright" target="_blank" rel="noopener">OpenStreetMap</a> contributors'));
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parent.appendChild(this.root);
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this.info.hidden = true;
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this.buildFloorBar();
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new ResizeObserver(() => this.resize()).observe(this.root);
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this.bindInput();
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requestAnimationFrame(() => {
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this.resize();
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this.fitBounds();
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});
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}
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destroy() {
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this.root.remove();
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window.removeEventListener('keydown', this.onKey);
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}
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private buildTop(): HTMLElement {
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const top = el('div', 'viewer-top card');
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const w = this.world;
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let floors = 0, rooms = 0, furn = 0, beds = 0, homes = 0;
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for (const b of w.buildings) {
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floors += b.floors.length;
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beds += b.beds;
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homes += b.units.filter((u) => u.kind === 'home').length;
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for (const f of b.floors) { rooms += f.rooms.length; furn += f.props.length; }
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}
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top.innerHTML = `
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<div class="title">${esc(w.name || 'Без названия')}</div>
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<div class="stats">${w.buildings.length.toLocaleString('ru')} зданий · ${floors.toLocaleString('ru')} этажей · ${rooms.toLocaleString('ru')} комнат · ${furn.toLocaleString('ru')} предметов · ${homes.toLocaleString('ru')} квартир/домов · ~${beds.toLocaleString('ru')} жителей</div>
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<div class="row">
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<button class="btn" data-a="new">Новая карта</button>
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<button class="btn" data-a="export" title="Скачать мир целиком (JSON) — формат для будущей игры">Экспорт мира</button>
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<label class="chip"><input type="checkbox" data-t="furniture" checked> Мебель</label>
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<label class="chip"><input type="checkbox" data-t="labels" checked> Подписи</label>
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</div>`;
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top.querySelector('[data-a=new]')!.addEventListener('click', () => this.actions.onNew());
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top.querySelector('[data-a=export]')!.addEventListener('click', () => this.actions.onExport());
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top.querySelectorAll<HTMLInputElement>('input[data-t]').forEach((inp) =>
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inp.addEventListener('change', () => {
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(this.opts as any)[inp.dataset.t!] = inp.checked;
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this.request();
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}));
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return top;
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}
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private buildFloorBar() {
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const bar = this.floorBar;
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bar.innerHTML = '<div class="floor-title">Этаж</div>';
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const list = el('div', 'floor-list');
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const mk = (label: string, value: number | null, title: string) => {
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const b = el('button', 'floor-btn', label);
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b.title = title;
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b.dataset.v = value === null ? 'roof' : String(value);
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b.addEventListener('click', () => this.setFloor(value));
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return b;
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};
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list.appendChild(mk('⌂', null, 'Крыши'));
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for (let l = this.maxLevel - 1; l >= 0; l--) list.appendChild(mk(String(l + 1), l, `${l + 1}-й этаж`));
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bar.appendChild(list);
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bar.appendChild(el('div', 'floor-hint', 'PgUp / PgDn'));
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this.syncFloorBar();
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}
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private syncFloorBar() {
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const v = this.opts.floor === null ? 'roof' : String(this.opts.floor);
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this.floorBar.querySelectorAll<HTMLButtonElement>('.floor-btn').forEach((b) => b.classList.toggle('on', b.dataset.v === v));
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}
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setFloor(v: number | null) {
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this.opts.floor = v;
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this.opts.overrides.clear();
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this.syncFloorBar();
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this.updateInfo();
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this.request();
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}
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private resize() {
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const r = this.root.getBoundingClientRect();
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const dpr = window.devicePixelRatio || 1;
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this.canvas.width = Math.round(r.width * dpr);
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this.canvas.height = Math.round(r.height * dpr);
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this.canvas.style.width = r.width + 'px';
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this.canvas.style.height = r.height + 'px';
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this.request();
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}
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fitBounds() {
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const B = this.world.bounds;
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const r = this.root.getBoundingClientRect();
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this.cam.x = (B.minX + B.maxX) / 2;
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this.cam.y = (B.minY + B.maxY) / 2;
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this.cam.z = Math.min(r.width / (B.maxX - B.minX), r.height / (B.maxY - B.minY)) * 0.92;
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this.request();
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}
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/** Перелёт к точке (для отладки и будущих событий). */
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lookAt(p: Vec, z: number) {
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this.cam = { x: p[0], y: p[1], z };
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this.request();
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}
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request() {
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if (this.raf) return;
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this.raf = requestAnimationFrame(() => {
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this.raf = 0;
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const r = this.root.getBoundingClientRect();
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this.renderer.draw(this.ctx, r.width, r.height, this.cam, this.opts, window.devicePixelRatio || 1);
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this.updateScale();
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});
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}
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private updateScale() {
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const z = this.cam.z;
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const target = 120 / z;
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const nice = [1, 2, 5, 10, 20, 50, 100, 200, 500, 1000, 2000, 5000].find((n) => n >= target * 0.6) ?? 5000;
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this.scale.style.width = nice * z + 'px';
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this.scale.textContent = nice >= 1000 ? `${nice / 1000} км` : `${nice} м`;
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}
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private screenToWorld(x: number, y: number): Vec {
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const r = this.root.getBoundingClientRect();
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return [(x - r.width / 2) / this.cam.z + this.cam.x, (y - r.height / 2) / this.cam.z + this.cam.y];
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}
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private zoomAt(x: number, y: number, factor: number) {
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const before = this.screenToWorld(x, y);
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this.cam.z = Math.max(0.05, Math.min(120, this.cam.z * factor));
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const after = this.screenToWorld(x, y);
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this.cam.x += before[0] - after[0];
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this.cam.y += before[1] - after[1];
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this.request();
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}
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private onKey = (e: KeyboardEvent) => {
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if ((e.target as HTMLElement)?.tagName === 'INPUT') return;
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const f = this.opts.floor;
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if (e.key === 'PageUp' || e.key === ']') this.setFloor(f === null ? 0 : Math.min(this.maxLevel - 1, f + 1));
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else if (e.key === 'PageDown' || e.key === '[') this.setFloor(f === null || f === 0 ? null : f - 1);
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else if (e.key === 'Escape') this.select(null);
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else if (e.key === '+' || e.key === '=') this.zoomAt(this.canvas.clientWidth / 2, this.canvas.clientHeight / 2, 1.3);
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else if (e.key === '-') this.zoomAt(this.canvas.clientWidth / 2, this.canvas.clientHeight / 2, 1 / 1.3);
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else return;
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e.preventDefault();
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};
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private bindInput() {
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const c = this.canvas;
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c.addEventListener('wheel', (e) => {
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e.preventDefault();
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const k = e.ctrlKey ? 0.01 : 0.0015;
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this.zoomAt(e.offsetX, e.offsetY, Math.exp(-e.deltaY * k));
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}, { passive: false });
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c.addEventListener('pointerdown', (e) => {
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c.setPointerCapture(e.pointerId);
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this.pointers.set(e.pointerId, { x: e.offsetX, y: e.offsetY });
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const ps = [...this.pointers.values()];
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const mx = ps.reduce((s, p) => s + p.x, 0) / ps.length, my = ps.reduce((s, p) => s + p.y, 0) / ps.length;
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this.gesture = { x: mx, y: my, cam: { ...this.cam }, d: ps.length === 2 ? Math.hypot(ps[0].x - ps[1].x, ps[0].y - ps[1].y) : undefined, moved: false };
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});
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c.addEventListener('pointermove', (e) => {
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if (!this.pointers.has(e.pointerId) || !this.gesture) return;
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this.pointers.set(e.pointerId, { x: e.offsetX, y: e.offsetY });
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const ps = [...this.pointers.values()];
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const mx = ps.reduce((s, p) => s + p.x, 0) / ps.length, my = ps.reduce((s, p) => s + p.y, 0) / ps.length;
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const g = this.gesture;
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if (Math.hypot(mx - g.x, my - g.y) > 4) g.moved = true;
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if (ps.length === 2 && g.d) {
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const d = Math.hypot(ps[0].x - ps[1].x, ps[0].y - ps[1].y);
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this.cam.z = Math.max(0.05, Math.min(120, g.cam.z * (d / g.d)));
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g.moved = true;
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}
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const r = this.root.getBoundingClientRect();
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const anchor: Vec = [(g.x - r.width / 2) / g.cam.z + g.cam.x, (g.y - r.height / 2) / g.cam.z + g.cam.y];
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this.cam.x = anchor[0] - (mx - r.width / 2) / this.cam.z;
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this.cam.y = anchor[1] - (my - r.height / 2) / this.cam.z;
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this.request();
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});
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const end = (e: PointerEvent) => {
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const g = this.gesture;
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this.pointers.delete(e.pointerId);
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if (g && !g.moved && this.pointers.size === 0) {
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const b = this.renderer.buildingAt(this.screenToWorld(e.offsetX, e.offsetY));
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this.select(b?.id ?? null);
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}
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if (this.pointers.size) {
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const ps = [...this.pointers.values()];
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this.gesture = { x: ps[0].x, y: ps[0].y, cam: { ...this.cam }, moved: true };
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} else this.gesture = null;
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};
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c.addEventListener('pointerup', end);
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c.addEventListener('pointercancel', end);
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c.addEventListener('dblclick', (e) => this.zoomAt(e.offsetX, e.offsetY, 2));
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window.addEventListener('keydown', this.onKey);
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}
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select(id: string | null) {
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this.opts.selected = id;
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this.updateInfo();
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this.request();
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}
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private updateInfo() {
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const id = this.opts.selected;
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const b = id ? this.world.buildings.find((x) => x.id === id) : null;
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if (!b) {
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this.info.hidden = true;
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return;
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}
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this.info.hidden = false;
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const cur = this.opts.overrides.has(b.id) ? this.opts.overrides.get(b.id)! : this.opts.floor;
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const lvl = cur !== null && cur < b.levels ? cur : null;
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const f = lvl !== null ? b.floors[lvl] : null;
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const src = b.levelsSource === 'osm' ? 'из OSM' : b.levelsSource === 'height' ? 'по высоте' : 'оценка';
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const counts = new Map<string, number>();
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if (f) for (const r of f.rooms) if (ROOM_NAME[r.kind]) counts.set(ROOM_NAME[r.kind], (counts.get(ROOM_NAME[r.kind]) ?? 0) + 1);
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const roomList = [...counts.entries()].map(([k, n]) => (n > 1 ? `${k} ×${n}` : k)).join(', ');
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const homes = b.units.filter((u) => u.kind === 'home').length;
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const osm = b.osmId ? `<a href="https://www.openstreetmap.org/${b.osmId}" target="_blank" rel="noopener">OSM</a>` : '';
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this.info.innerHTML = `
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<button class="close" title="Закрыть">×</button>
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<div class="title">${esc(b.name || KIND_NAME[b.kind])}</div>
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<div class="sub">${b.name ? esc(KIND_NAME[b.kind]) + ' · ' : ''}${b.use ? esc(b.use) + ' · ' : ''}${b.address ? esc(b.address) : ''}</div>
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<div class="kv"><span>Этажей</span><b>${b.levels}</b> <i>${src}</i></div>
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<div class="kv"><span>Площадь застройки</span><b>${Math.round(b.area)} м²</b></div>
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${homes ? `<div class="kv"><span>Жилых помещений</span><b>${homes}</b></div>` : ''}
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${b.beds ? `<div class="kv"><span>Спальных мест</span><b>${b.beds}</b></div>` : ''}
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<div class="floor-pick">${['⌂', ...Array.from({ length: Math.min(b.levels, 40) }, (_, i) => String(i + 1))].map((t, i) => `<button class="floor-btn sm${(i === 0 && lvl === null) || lvl === i - 1 ? ' on' : ''}" data-l="${i - 1}">${t}</button>`).join('')}</div>
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${f ? `<div class="rooms">${f.rooms.length} помещений: ${esc(roomList)}</div>` : ''}
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<div class="links">${osm}<a href="#" data-a="zoom">Приблизить</a></div>`;
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this.info.querySelector('.close')!.addEventListener('click', () => this.select(null));
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this.info.querySelectorAll<HTMLButtonElement>('[data-l]').forEach((btn) =>
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btn.addEventListener('click', () => {
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const l = +btn.dataset.l!;
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this.opts.overrides.set(b.id, l < 0 ? null : l);
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this.updateInfo();
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this.request();
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}));
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this.info.querySelector('[data-a=zoom]')!.addEventListener('click', (e) => {
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e.preventDefault();
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const c = centroid(b.footprint);
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const span = Math.sqrt(b.area) * 1.8 + 10;
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const r = this.root.getBoundingClientRect();
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this.lookAt(c, Math.min(60, Math.min(r.width, r.height) / span));
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if (this.opts.overrides.get(b.id) == null && this.opts.floor === null) this.opts.overrides.set(b.id, 0);
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this.updateInfo();
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});
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}
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selectBuilding(b: Building) {
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this.select(b.id);
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}
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}
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