FM / crs

/opt/canhelp/node_modules/leaflet/src/geo/crs/

/opt/canhelp/node_modules/leaflet/src/geo/crs

Name	Size	Mode	Actions
CRS.Earth.js	1133	0755	edit dl rm
CRS.EPSG3395.js	588	0644	edit dl rm
CRS.EPSG3857.js	801	0644	edit dl rm
CRS.EPSG4326.js	983	0644	edit dl rm
CRS.js	5281	0644	edit dl rm
CRS.Simple.js	926	0644	edit dl rm
index.js	394	0644	edit dl rm

Edit: /opt/canhelp/node_modules/leaflet/src/geo/crs/CRS.js (5281B)

import {Bounds} from '../../geometry/Bounds';
import {LatLng} from '../LatLng';
import {LatLngBounds} from '../LatLngBounds';
import * as Util from '../../core/Util';

/*
 * @namespace CRS
 * @crs L.CRS.Base
 * Object that defines coordinate reference systems for projecting
 * geographical points into pixel (screen) coordinates and back (and to
 * coordinates in other units for [WMS](https://en.wikipedia.org/wiki/Web_Map_Service) services). See
 * [spatial reference system](https://en.wikipedia.org/wiki/Spatial_reference_system).
 *
 * Leaflet defines the most usual CRSs by default. If you want to use a
 * CRS not defined by default, take a look at the
 * [Proj4Leaflet](https://github.com/kartena/Proj4Leaflet) plugin.
 *
 * Note that the CRS instances do not inherit from Leaflet's `Class` object,
 * and can't be instantiated. Also, new classes can't inherit from them,
 * and methods can't be added to them with the `include` function.
 */

export var CRS = {
	// @method latLngToPoint(latlng: LatLng, zoom: Number): Point
	// Projects geographical coordinates into pixel coordinates for a given zoom.
	latLngToPoint: function (latlng, zoom) {
		var projectedPoint = this.projection.project(latlng),
		    scale = this.scale(zoom);

return this.transformation._transform(projectedPoint, scale);
	},

// @method pointToLatLng(point: Point, zoom: Number): LatLng
	// The inverse of `latLngToPoint`. Projects pixel coordinates on a given
	// zoom into geographical coordinates.
	pointToLatLng: function (point, zoom) {
		var scale = this.scale(zoom),
		    untransformedPoint = this.transformation.untransform(point, scale);

return this.projection.unproject(untransformedPoint);
	},

// @method project(latlng: LatLng): Point
	// Projects geographical coordinates into coordinates in units accepted for
	// this CRS (e.g. meters for EPSG:3857, for passing it to WMS services).
	project: function (latlng) {
		return this.projection.project(latlng);
	},

// @method unproject(point: Point): LatLng
	// Given a projected coordinate returns the corresponding LatLng.
	// The inverse of `project`.
	unproject: function (point) {
		return this.projection.unproject(point);
	},

// @method scale(zoom: Number): Number
	// Returns the scale used when transforming projected coordinates into
	// pixel coordinates for a particular zoom. For example, it returns
	// `256 * 2^zoom` for Mercator-based CRS.
	scale: function (zoom) {
		return 256 * Math.pow(2, zoom);
	},

// @method zoom(scale: Number): Number
	// Inverse of `scale()`, returns the zoom level corresponding to a scale
	// factor of `scale`.
	zoom: function (scale) {
		return Math.log(scale / 256) / Math.LN2;
	},

// @method getProjectedBounds(zoom: Number): Bounds
	// Returns the projection's bounds scaled and transformed for the provided `zoom`.
	getProjectedBounds: function (zoom) {
		if (this.infinite) { return null; }

var 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);
	},

// @method distance(latlng1: LatLng, latlng2: LatLng): Number
	// Returns the distance between two geographical coordinates.

// @property code: String
	// Standard code name of the CRS passed into WMS services (e.g. `'EPSG:3857'`)
	//
	// @property wrapLng: Number[]
	// An array of two numbers defining whether the longitude (horizontal) coordinate
	// axis wraps around a given range and how. Defaults to `[-180, 180]` in most
	// geographical CRSs. If `undefined`, the longitude axis does not wrap around.
	//
	// @property wrapLat: Number[]
	// Like `wrapLng`, but for the latitude (vertical) axis.

// wrapLng: [min, max],
	// wrapLat: [min, max],

// @property infinite: Boolean
	// If true, the coordinate space will be unbounded (infinite in both axes)
	infinite: false,

// @method wrapLatLng(latlng: LatLng): LatLng
	// Returns a `LatLng` where lat and lng has been wrapped according to the
	// CRS's `wrapLat` and `wrapLng` properties, if they are outside the CRS's bounds.
	wrapLatLng: function (latlng) {
		var lng = this.wrapLng ? Util.wrapNum(latlng.lng, this.wrapLng, true) : latlng.lng,
		    lat = this.wrapLat ? Util.wrapNum(latlng.lat, this.wrapLat, true) : latlng.lat,
		    alt = latlng.alt;

return new LatLng(lat, lng, alt);
	},

// @method wrapLatLngBounds(bounds: LatLngBounds): LatLngBounds
	// Returns a `LatLngBounds` with the same size as the given one, ensuring
	// that its center is within the CRS's bounds.
	// Only accepts actual `L.LatLngBounds` instances, not arrays.
	wrapLatLngBounds: function (bounds) {
		var center = bounds.getCenter(),
		    newCenter = this.wrapLatLng(center),
		    latShift = center.lat - newCenter.lat,
		    lngShift = center.lng - newCenter.lng;

if (latShift === 0 && lngShift === 0) {
			return bounds;
		}

var 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);
	}
};

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