maplair/dist/esm/geo/crs/CRS.js

JavaScript library for mobile-friendly interactive maps

import { wrapNum } from "../../core/Util.js";
import { Bounds } from "../../geometry/Bounds.js";
import { LatLngBounds } from "../LatLngBounds.js";
import { LatLng } from "../LatLng.js";
//#region src/geo/crs/CRS.js
var CRS = class {
	static projection = void 0;
	static transformation = void 0;
	static latLngToPoint(latlng, zoom) {
		const projectedPoint = this.projection.project(latlng), scale = this.scale(zoom);
		return this.transformation._transform(projectedPoint, scale);
	}
	static pointToLatLng(point, zoom) {
		const scale = this.scale(zoom), untransformedPoint = this.transformation.untransform(point, scale);
		return this.projection.unproject(untransformedPoint);
	}
	static project(latlng) {
		return this.projection.project(latlng);
	}
	static unproject(point) {
		return this.projection.unproject(point);
	}
	static scale(zoom) {
		return 256 * 2 ** zoom;
	}
	static zoom(scale) {
		return Math.log(scale / 256) / Math.LN2;
	}
	static getProjectedBounds(zoom) {
		if (this.infinite) return null;
		const b = this.projection.bounds, s = this.scale(zoom), min = this.transformation.transform(b.min, s), max = this.transformation.transform(b.max, s);
		return new Bounds(min, max);
	}
	static infinite = false;
	static wrapLatLng(latlng) {
		latlng = new LatLng(latlng);
		const lng = this.wrapLng ? wrapNum(latlng.lng, this.wrapLng, true) : latlng.lng, lat = this.wrapLat ? wrapNum(latlng.lat, this.wrapLat, true) : latlng.lat, alt = latlng.alt;
		return new LatLng(lat, lng, alt);
	}
	static wrapLatLngBounds(bounds) {
		bounds = new LatLngBounds(bounds);
		const center = bounds.getCenter(), newCenter = this.wrapLatLng(center), latShift = center.lat - newCenter.lat, lngShift = center.lng - newCenter.lng;
		if (latShift === 0 && lngShift === 0) return bounds;
		const sw = bounds.getSouthWest(), ne = bounds.getNorthEast(), newSw = new LatLng(sw.lat - latShift, sw.lng - lngShift), newNe = new LatLng(ne.lat - latShift, ne.lng - lngShift);
		return new LatLngBounds(newSw, newNe);
	}
};
//#endregion
export { CRS };

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