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1029 lines
41 KiB
JavaScript
1029 lines
41 KiB
JavaScript
var __extends = (this && this.__extends) || (function () {
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var extendStatics = function (d, b) {
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extendStatics = Object.setPrototypeOf ||
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({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
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function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };
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return extendStatics(d, b);
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};
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return function (d, b) {
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if (typeof b !== "function" && b !== null)
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throw new TypeError("Class extends value " + String(b) + " is not a constructor or null");
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extendStatics(d, b);
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function __() { this.constructor = d; }
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d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
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};
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})();
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/**
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* @module ol/layer/Graticule
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*/
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import Collection from '../Collection.js';
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import EventType from '../render/EventType.js';
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import Feature from '../Feature.js';
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import Fill from '../style/Fill.js';
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import GeometryLayout from '../geom/GeometryLayout.js';
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import LineString from '../geom/LineString.js';
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import Point from '../geom/Point.js';
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import Stroke from '../style/Stroke.js';
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import Style from '../style/Style.js';
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import Text from '../style/Text.js';
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import VectorLayer from './Vector.js';
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import VectorSource from '../source/Vector.js';
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import { applyTransform, approximatelyEquals, containsCoordinate, containsExtent, equals, getCenter, getIntersection, getWidth, intersects, isEmpty, wrapX as wrapExtentX, } from '../extent.js';
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import { assign } from '../obj.js';
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import { clamp } from '../math.js';
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import { degreesToStringHDMS } from '../coordinate.js';
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import { equivalent as equivalentProjection, get as getProjection, getTransform, } from '../proj.js';
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import { getVectorContext } from '../render.js';
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import { meridian, parallel } from '../geom/flat/geodesic.js';
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/**
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* @type {Stroke}
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* @private
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* @const
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*/
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var DEFAULT_STROKE_STYLE = new Stroke({
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color: 'rgba(0,0,0,0.2)',
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});
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/**
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* @type {Array<number>}
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* @private
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*/
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var INTERVALS = [
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90, 45, 30, 20, 10, 5, 2, 1, 0.5, 0.2, 0.1, 0.05, 0.01, 0.005, 0.002, 0.001,
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];
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/**
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* @typedef {Object} GraticuleLabelDataType
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* @property {Point} geom Geometry.
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* @property {string} text Text.
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*/
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/**
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* @typedef {Object} Options
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* @property {string} [className='ol-layer'] A CSS class name to set to the layer element.
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* @property {number} [opacity=1] Opacity (0, 1).
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* @property {boolean} [visible=true] Visibility.
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* @property {import("../extent.js").Extent} [extent] The bounding extent for layer rendering. The layer will not be
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* rendered outside of this extent.
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* @property {number} [zIndex] The z-index for layer rendering. At rendering time, the layers
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* will be ordered, first by Z-index and then by position. When `undefined`, a `zIndex` of 0 is assumed
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* for layers that are added to the map's `layers` collection, or `Infinity` when the layer's `setMap()`
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* method was used.
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* @property {number} [minResolution] The minimum resolution (inclusive) at which this layer will be
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* visible.
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* @property {number} [maxResolution] The maximum resolution (exclusive) below which this layer will
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* be visible.
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* @property {number} [minZoom] The minimum view zoom level (exclusive) above which this layer will be
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* visible.
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* @property {number} [maxZoom] The maximum view zoom level (inclusive) at which this layer will
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* be visible.
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* @property {number} [maxLines=100] The maximum number of meridians and
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* parallels from the center of the map. The default value of 100 means that at
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* most 200 meridians and 200 parallels will be displayed. The default value is
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* appropriate for conformal projections like Spherical Mercator. If you
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* increase the value, more lines will be drawn and the drawing performance will
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* decrease.
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* @property {Stroke} [strokeStyle] The
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* stroke style to use for drawing the graticule. If not provided, the following stroke will be used:
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* ```js
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* new Stroke({
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* color: 'rgba(0, 0, 0, 0.2)' // a not fully opaque black
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* });
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* ```
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* @property {number} [targetSize=100] The target size of the graticule cells,
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* in pixels.
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* @property {boolean} [showLabels=false] Render a label with the respective
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* latitude/longitude for each graticule line.
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* @property {function(number):string} [lonLabelFormatter] Label formatter for
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* longitudes. This function is called with the longitude as argument, and
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* should return a formatted string representing the longitude. By default,
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* labels are formatted as degrees, minutes, seconds and hemisphere.
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* @property {function(number):string} [latLabelFormatter] Label formatter for
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* latitudes. This function is called with the latitude as argument, and
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* should return a formatted string representing the latitude. By default,
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* labels are formatted as degrees, minutes, seconds and hemisphere.
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* @property {number} [lonLabelPosition=0] Longitude label position in fractions
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* (0..1) of view extent. 0 means at the bottom of the viewport, 1 means at the
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* top.
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* @property {number} [latLabelPosition=1] Latitude label position in fractions
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* (0..1) of view extent. 0 means at the left of the viewport, 1 means at the
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* right.
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* @property {Text} [lonLabelStyle] Longitude label text
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* style. If not provided, the following style will be used:
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* ```js
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* new Text({
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* font: '12px Calibri,sans-serif',
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* textBaseline: 'bottom',
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* fill: new Fill({
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* color: 'rgba(0,0,0,1)'
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* }),
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* stroke: new Stroke({
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* color: 'rgba(255,255,255,1)',
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* width: 3
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* })
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* });
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* ```
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* Note that the default's `textBaseline` configuration will not work well for
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* `lonLabelPosition` configurations that position labels close to the top of
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* the viewport.
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* @property {Text} [latLabelStyle] Latitude label text style.
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* If not provided, the following style will be used:
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* ```js
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* new Text({
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* font: '12px Calibri,sans-serif',
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* textAlign: 'end',
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* fill: new Fill({
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* color: 'rgba(0,0,0,1)'
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* }),
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* stroke: Stroke({
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* color: 'rgba(255,255,255,1)',
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* width: 3
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* })
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* });
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* ```
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* Note that the default's `textAlign` configuration will not work well for
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* `latLabelPosition` configurations that position labels close to the left of
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* the viewport.
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* @property {Array<number>} [intervals=[90, 45, 30, 20, 10, 5, 2, 1, 0.5, 0.2, 0.1, 0.05, 0.01, 0.005, 0.002, 0.001]]
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* Intervals (in degrees) for the graticule. Example to limit graticules to 30 and 10 degrees intervals:
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* ```js
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* [30, 10]
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* ```
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* @property {boolean} [wrapX=true] Whether to repeat the graticule horizontally.
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* @property {Object<string, *>} [properties] Arbitrary observable properties. Can be accessed with `#get()` and `#set()`.
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*/
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/**
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* @classdesc
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* Layer that renders a grid for a coordinate system (currently only EPSG:4326 is supported).
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* Note that the view projection must define both extent and worldExtent.
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*
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* @fires import("../render/Event.js").RenderEvent
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* @extends {VectorLayer<import("../source/Vector.js").default>}
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* @api
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*/
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var Graticule = /** @class */ (function (_super) {
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__extends(Graticule, _super);
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/**
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* @param {Options} [opt_options] Options.
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*/
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function Graticule(opt_options) {
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var _this = this;
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var options = opt_options ? opt_options : {};
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var baseOptions = assign({
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updateWhileAnimating: true,
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updateWhileInteracting: true,
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renderBuffer: 0,
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}, options);
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delete baseOptions.maxLines;
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delete baseOptions.strokeStyle;
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delete baseOptions.targetSize;
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delete baseOptions.showLabels;
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delete baseOptions.lonLabelFormatter;
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delete baseOptions.latLabelFormatter;
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delete baseOptions.lonLabelPosition;
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delete baseOptions.latLabelPosition;
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delete baseOptions.lonLabelStyle;
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delete baseOptions.latLabelStyle;
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delete baseOptions.intervals;
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_this = _super.call(this, baseOptions) || this;
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/**
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* @type {import("../proj/Projection.js").default}
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*/
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_this.projection_ = null;
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/**
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* @type {number}
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* @private
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*/
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_this.maxLat_ = Infinity;
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/**
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* @type {number}
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* @private
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*/
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_this.maxLon_ = Infinity;
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/**
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* @type {number}
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* @private
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*/
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_this.minLat_ = -Infinity;
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/**
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* @type {number}
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* @private
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*/
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_this.minLon_ = -Infinity;
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/**
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* @type {number}
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* @private
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*/
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_this.maxX_ = Infinity;
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/**
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* @type {number}
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* @private
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*/
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_this.maxY_ = Infinity;
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/**
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* @type {number}
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* @private
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*/
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_this.minX_ = -Infinity;
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/**
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* @type {number}
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* @private
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*/
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_this.minY_ = -Infinity;
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/**
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* @type {number}
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* @private
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*/
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_this.targetSize_ =
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options.targetSize !== undefined ? options.targetSize : 100;
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/**
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* @type {number}
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* @private
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*/
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_this.maxLines_ = options.maxLines !== undefined ? options.maxLines : 100;
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/**
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* @type {Array<LineString>}
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* @private
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*/
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_this.meridians_ = [];
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/**
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* @type {Array<LineString>}
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* @private
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*/
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_this.parallels_ = [];
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/**
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* @type {Stroke}
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* @private
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*/
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_this.strokeStyle_ =
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options.strokeStyle !== undefined
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? options.strokeStyle
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: DEFAULT_STROKE_STYLE;
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/**
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* @type {import("../proj.js").TransformFunction|undefined}
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* @private
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*/
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_this.fromLonLatTransform_ = undefined;
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/**
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* @type {import("../proj.js").TransformFunction|undefined}
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* @private
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*/
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_this.toLonLatTransform_ = undefined;
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/**
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* @type {import("../coordinate.js").Coordinate}
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* @private
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*/
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_this.projectionCenterLonLat_ = null;
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/**
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* @type {import("../coordinate.js").Coordinate}
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* @private
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*/
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_this.bottomLeft_ = null;
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/**
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* @type {import("../coordinate.js").Coordinate}
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* @private
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*/
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_this.bottomRight_ = null;
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/**
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* @type {import("../coordinate.js").Coordinate}
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* @private
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*/
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_this.topLeft_ = null;
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/**
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* @type {import("../coordinate.js").Coordinate}
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* @private
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*/
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_this.topRight_ = null;
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/**
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* @type {Array<GraticuleLabelDataType>}
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* @private
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*/
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_this.meridiansLabels_ = null;
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/**
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* @type {Array<GraticuleLabelDataType>}
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* @private
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*/
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_this.parallelsLabels_ = null;
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if (options.showLabels) {
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/**
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* @type {null|function(number):string}
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* @private
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*/
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_this.lonLabelFormatter_ =
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options.lonLabelFormatter == undefined
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? degreesToStringHDMS.bind(_this, 'EW')
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: options.lonLabelFormatter;
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/**
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* @type {function(number):string}
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* @private
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*/
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_this.latLabelFormatter_ =
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options.latLabelFormatter == undefined
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? degreesToStringHDMS.bind(_this, 'NS')
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: options.latLabelFormatter;
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/**
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* Longitude label position in fractions (0..1) of view extent. 0 means
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* bottom, 1 means top.
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* @type {number}
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* @private
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*/
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_this.lonLabelPosition_ =
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options.lonLabelPosition == undefined ? 0 : options.lonLabelPosition;
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/**
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* Latitude Label position in fractions (0..1) of view extent. 0 means left, 1
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* means right.
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* @type {number}
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* @private
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*/
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_this.latLabelPosition_ =
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options.latLabelPosition == undefined ? 1 : options.latLabelPosition;
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/**
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* @type {Style}
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* @private
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*/
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_this.lonLabelStyleBase_ = new Style({
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text: options.lonLabelStyle !== undefined
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? options.lonLabelStyle.clone()
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: new Text({
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font: '12px Calibri,sans-serif',
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textBaseline: 'bottom',
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fill: new Fill({
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color: 'rgba(0,0,0,1)',
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}),
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stroke: new Stroke({
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color: 'rgba(255,255,255,1)',
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width: 3,
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}),
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}),
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});
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/**
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* @private
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* @param {import("../Feature").default} feature Feature
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* @return {Style} style
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*/
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_this.lonLabelStyle_ = function (feature) {
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var label = feature.get('graticule_label');
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this.lonLabelStyleBase_.getText().setText(label);
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return this.lonLabelStyleBase_;
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}.bind(_this);
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/**
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* @type {Style}
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* @private
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*/
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_this.latLabelStyleBase_ = new Style({
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text: options.latLabelStyle !== undefined
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? options.latLabelStyle.clone()
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: new Text({
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font: '12px Calibri,sans-serif',
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textAlign: 'right',
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fill: new Fill({
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color: 'rgba(0,0,0,1)',
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}),
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stroke: new Stroke({
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color: 'rgba(255,255,255,1)',
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width: 3,
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}),
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}),
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});
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/**
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* @private
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* @param {import("../Feature").default} feature Feature
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* @return {Style} style
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*/
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_this.latLabelStyle_ = function (feature) {
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var label = feature.get('graticule_label');
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this.latLabelStyleBase_.getText().setText(label);
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return this.latLabelStyleBase_;
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}.bind(_this);
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_this.meridiansLabels_ = [];
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_this.parallelsLabels_ = [];
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_this.addEventListener(EventType.POSTRENDER, _this.drawLabels_.bind(_this));
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}
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/**
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* @type {Array<number>}
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* @private
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*/
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_this.intervals_ =
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options.intervals !== undefined ? options.intervals : INTERVALS;
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// use a source with a custom loader for lines & text
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_this.setSource(new VectorSource({
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loader: _this.loaderFunction.bind(_this),
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strategy: _this.strategyFunction.bind(_this),
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features: new Collection(),
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overlaps: false,
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useSpatialIndex: false,
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wrapX: options.wrapX,
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}));
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/**
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* feature pool to use when updating graticule
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* @type {Array<Feature>}
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* @private
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*/
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_this.featurePool_ = [];
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/**
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* @type {Style}
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|
* @private
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*/
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_this.lineStyle_ = new Style({
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stroke: _this.strokeStyle_,
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});
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/**
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* @type {?import("../extent.js").Extent}
|
|
* @private
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|
*/
|
|
_this.loadedExtent_ = null;
|
|
/**
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|
* @type {?import("../extent.js").Extent}
|
|
* @private
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|
*/
|
|
_this.renderedExtent_ = null;
|
|
/**
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|
* @type {?number}
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|
* @private
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*/
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_this.renderedResolution_ = null;
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_this.setRenderOrder(null);
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return _this;
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}
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|
/**
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|
* Strategy function for loading features based on the view's extent and
|
|
* resolution.
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|
* @param {import("../extent.js").Extent} extent Extent.
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* @param {number} resolution Resolution.
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|
* @return {Array<import("../extent.js").Extent>} Extents.
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*/
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Graticule.prototype.strategyFunction = function (extent, resolution) {
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// extents may be passed in different worlds, to avoid endless loop we use only one
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var realWorldExtent = extent.slice();
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if (this.projection_ && this.getSource().getWrapX()) {
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wrapExtentX(realWorldExtent, this.projection_);
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|
}
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|
if (this.loadedExtent_) {
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|
if (approximatelyEquals(this.loadedExtent_, realWorldExtent, resolution)) {
|
|
// make sure result is exactly equal to previous extent
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|
realWorldExtent = this.loadedExtent_.slice();
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|
}
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|
else {
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|
// we should not keep track of loaded extents
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this.getSource().removeLoadedExtent(this.loadedExtent_);
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}
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|
}
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return [realWorldExtent];
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};
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|
/**
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|
* Update geometries in the source based on current view
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|
* @param {import("../extent").Extent} extent Extent
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|
* @param {number} resolution Resolution
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|
* @param {import("../proj/Projection.js").default} projection Projection
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*/
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|
Graticule.prototype.loaderFunction = function (extent, resolution, projection) {
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this.loadedExtent_ = extent;
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var source = this.getSource();
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// only consider the intersection between our own extent & the requested one
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|
var layerExtent = this.getExtent() || [
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-Infinity,
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-Infinity,
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Infinity,
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Infinity,
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];
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var renderExtent = getIntersection(layerExtent, extent);
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if (this.renderedExtent_ &&
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equals(this.renderedExtent_, renderExtent) &&
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this.renderedResolution_ === resolution) {
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return;
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|
}
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|
this.renderedExtent_ = renderExtent;
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|
this.renderedResolution_ = resolution;
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|
// bail out if nothing to render
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|
if (isEmpty(renderExtent)) {
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return;
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}
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|
// update projection info
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|
var center = getCenter(renderExtent);
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|
var squaredTolerance = (resolution * resolution) / 4;
|
|
var updateProjectionInfo = !this.projection_ || !equivalentProjection(this.projection_, projection);
|
|
if (updateProjectionInfo) {
|
|
this.updateProjectionInfo_(projection);
|
|
}
|
|
this.createGraticule_(renderExtent, center, resolution, squaredTolerance);
|
|
// first make sure we have enough features in the pool
|
|
var featureCount = this.meridians_.length + this.parallels_.length;
|
|
if (this.meridiansLabels_) {
|
|
featureCount += this.meridians_.length;
|
|
}
|
|
if (this.parallelsLabels_) {
|
|
featureCount += this.parallels_.length;
|
|
}
|
|
var feature;
|
|
while (featureCount > this.featurePool_.length) {
|
|
feature = new Feature();
|
|
this.featurePool_.push(feature);
|
|
}
|
|
var featuresColl = source.getFeaturesCollection();
|
|
featuresColl.clear();
|
|
var poolIndex = 0;
|
|
// add features for the lines & labels
|
|
var i, l;
|
|
for (i = 0, l = this.meridians_.length; i < l; ++i) {
|
|
feature = this.featurePool_[poolIndex++];
|
|
feature.setGeometry(this.meridians_[i]);
|
|
feature.setStyle(this.lineStyle_);
|
|
featuresColl.push(feature);
|
|
}
|
|
for (i = 0, l = this.parallels_.length; i < l; ++i) {
|
|
feature = this.featurePool_[poolIndex++];
|
|
feature.setGeometry(this.parallels_[i]);
|
|
feature.setStyle(this.lineStyle_);
|
|
featuresColl.push(feature);
|
|
}
|
|
};
|
|
/**
|
|
* @param {number} lon Longitude.
|
|
* @param {number} minLat Minimal latitude.
|
|
* @param {number} maxLat Maximal latitude.
|
|
* @param {number} squaredTolerance Squared tolerance.
|
|
* @param {import("../extent.js").Extent} extent Extent.
|
|
* @param {number} index Index.
|
|
* @return {number} Index.
|
|
* @private
|
|
*/
|
|
Graticule.prototype.addMeridian_ = function (lon, minLat, maxLat, squaredTolerance, extent, index) {
|
|
var lineString = this.getMeridian_(lon, minLat, maxLat, squaredTolerance, index);
|
|
if (intersects(lineString.getExtent(), extent)) {
|
|
if (this.meridiansLabels_) {
|
|
var text = this.lonLabelFormatter_(lon);
|
|
if (index in this.meridiansLabels_) {
|
|
this.meridiansLabels_[index].text = text;
|
|
}
|
|
else {
|
|
this.meridiansLabels_[index] = {
|
|
geom: new Point([]),
|
|
text: text,
|
|
};
|
|
}
|
|
}
|
|
this.meridians_[index++] = lineString;
|
|
}
|
|
return index;
|
|
};
|
|
/**
|
|
* @param {number} lat Latitude.
|
|
* @param {number} minLon Minimal longitude.
|
|
* @param {number} maxLon Maximal longitude.
|
|
* @param {number} squaredTolerance Squared tolerance.
|
|
* @param {import("../extent.js").Extent} extent Extent.
|
|
* @param {number} index Index.
|
|
* @return {number} Index.
|
|
* @private
|
|
*/
|
|
Graticule.prototype.addParallel_ = function (lat, minLon, maxLon, squaredTolerance, extent, index) {
|
|
var lineString = this.getParallel_(lat, minLon, maxLon, squaredTolerance, index);
|
|
if (intersects(lineString.getExtent(), extent)) {
|
|
if (this.parallelsLabels_) {
|
|
var text = this.latLabelFormatter_(lat);
|
|
if (index in this.parallelsLabels_) {
|
|
this.parallelsLabels_[index].text = text;
|
|
}
|
|
else {
|
|
this.parallelsLabels_[index] = {
|
|
geom: new Point([]),
|
|
text: text,
|
|
};
|
|
}
|
|
}
|
|
this.parallels_[index++] = lineString;
|
|
}
|
|
return index;
|
|
};
|
|
/**
|
|
* @param {import("../render/Event.js").default} event Render event.
|
|
* @private
|
|
*/
|
|
Graticule.prototype.drawLabels_ = function (event) {
|
|
var rotation = event.frameState.viewState.rotation;
|
|
var resolution = event.frameState.viewState.resolution;
|
|
var size = event.frameState.size;
|
|
var extent = event.frameState.extent;
|
|
var rotationCenter = getCenter(extent);
|
|
var rotationExtent = extent;
|
|
if (rotation) {
|
|
var unrotatedWidth = size[0] * resolution;
|
|
var unrotatedHeight = size[1] * resolution;
|
|
rotationExtent = [
|
|
rotationCenter[0] - unrotatedWidth / 2,
|
|
rotationCenter[1] - unrotatedHeight / 2,
|
|
rotationCenter[0] + unrotatedWidth / 2,
|
|
rotationCenter[1] + unrotatedHeight / 2,
|
|
];
|
|
}
|
|
var startWorld = 0;
|
|
var endWorld = 0;
|
|
var labelsAtStart = this.latLabelPosition_ < 0.5;
|
|
var projectionExtent = this.projection_.getExtent();
|
|
var worldWidth = getWidth(projectionExtent);
|
|
if (this.getSource().getWrapX() &&
|
|
this.projection_.canWrapX() &&
|
|
!containsExtent(projectionExtent, extent)) {
|
|
startWorld = Math.floor((extent[0] - projectionExtent[0]) / worldWidth);
|
|
endWorld = Math.ceil((extent[2] - projectionExtent[2]) / worldWidth);
|
|
var inverted = Math.abs(rotation) > Math.PI / 2;
|
|
labelsAtStart = labelsAtStart !== inverted;
|
|
}
|
|
var vectorContext = getVectorContext(event);
|
|
for (var world = startWorld; world <= endWorld; ++world) {
|
|
var poolIndex = this.meridians_.length + this.parallels_.length;
|
|
var feature = void 0, index = void 0, l = void 0, textPoint = void 0;
|
|
if (this.meridiansLabels_) {
|
|
for (index = 0, l = this.meridiansLabels_.length; index < l; ++index) {
|
|
var lineString = this.meridians_[index];
|
|
if (!rotation && world === 0) {
|
|
textPoint = this.getMeridianPoint_(lineString, extent, index);
|
|
}
|
|
else {
|
|
var clone = lineString.clone();
|
|
clone.translate(world * worldWidth, 0);
|
|
clone.rotate(-rotation, rotationCenter);
|
|
textPoint = this.getMeridianPoint_(clone, rotationExtent, index);
|
|
textPoint.rotate(rotation, rotationCenter);
|
|
}
|
|
feature = this.featurePool_[poolIndex++];
|
|
feature.setGeometry(textPoint);
|
|
feature.set('graticule_label', this.meridiansLabels_[index].text);
|
|
vectorContext.drawFeature(feature, this.lonLabelStyle_(feature));
|
|
}
|
|
}
|
|
if (this.parallelsLabels_) {
|
|
if ((world === startWorld && labelsAtStart) ||
|
|
(world === endWorld && !labelsAtStart)) {
|
|
for (index = 0, l = this.parallels_.length; index < l; ++index) {
|
|
var lineString = this.parallels_[index];
|
|
if (!rotation && world === 0) {
|
|
textPoint = this.getParallelPoint_(lineString, extent, index);
|
|
}
|
|
else {
|
|
var clone = lineString.clone();
|
|
clone.translate(world * worldWidth, 0);
|
|
clone.rotate(-rotation, rotationCenter);
|
|
textPoint = this.getParallelPoint_(clone, rotationExtent, index);
|
|
textPoint.rotate(rotation, rotationCenter);
|
|
}
|
|
feature = this.featurePool_[poolIndex++];
|
|
feature.setGeometry(textPoint);
|
|
feature.set('graticule_label', this.parallelsLabels_[index].text);
|
|
vectorContext.drawFeature(feature, this.latLabelStyle_(feature));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
};
|
|
/**
|
|
* @param {import("../extent.js").Extent} extent Extent.
|
|
* @param {import("../coordinate.js").Coordinate} center Center.
|
|
* @param {number} resolution Resolution.
|
|
* @param {number} squaredTolerance Squared tolerance.
|
|
* @private
|
|
*/
|
|
Graticule.prototype.createGraticule_ = function (extent, center, resolution, squaredTolerance) {
|
|
var interval = this.getInterval_(resolution);
|
|
if (interval == -1) {
|
|
this.meridians_.length = 0;
|
|
this.parallels_.length = 0;
|
|
if (this.meridiansLabels_) {
|
|
this.meridiansLabels_.length = 0;
|
|
}
|
|
if (this.parallelsLabels_) {
|
|
this.parallelsLabels_.length = 0;
|
|
}
|
|
return;
|
|
}
|
|
var wrapX = false;
|
|
var projectionExtent = this.projection_.getExtent();
|
|
var worldWidth = getWidth(projectionExtent);
|
|
if (this.getSource().getWrapX() &&
|
|
this.projection_.canWrapX() &&
|
|
!containsExtent(projectionExtent, extent)) {
|
|
if (getWidth(extent) >= worldWidth) {
|
|
extent[0] = projectionExtent[0];
|
|
extent[2] = projectionExtent[2];
|
|
}
|
|
else {
|
|
wrapX = true;
|
|
}
|
|
}
|
|
// Constrain the center to fit into the extent available to the graticule
|
|
var validCenterP = [
|
|
clamp(center[0], this.minX_, this.maxX_),
|
|
clamp(center[1], this.minY_, this.maxY_),
|
|
];
|
|
// Transform the center to lon lat
|
|
// Some projections may have a void area at the poles
|
|
// so replace any NaN latitudes with the min or max value closest to a pole
|
|
var centerLonLat = this.toLonLatTransform_(validCenterP);
|
|
if (isNaN(centerLonLat[1])) {
|
|
centerLonLat[1] =
|
|
Math.abs(this.maxLat_) >= Math.abs(this.minLat_)
|
|
? this.maxLat_
|
|
: this.minLat_;
|
|
}
|
|
var centerLon = clamp(centerLonLat[0], this.minLon_, this.maxLon_);
|
|
var centerLat = clamp(centerLonLat[1], this.minLat_, this.maxLat_);
|
|
var maxLines = this.maxLines_;
|
|
var cnt, idx, lat, lon;
|
|
// Limit the extent to fit into the extent available to the graticule
|
|
var validExtentP = extent;
|
|
if (!wrapX) {
|
|
validExtentP = [
|
|
clamp(extent[0], this.minX_, this.maxX_),
|
|
clamp(extent[1], this.minY_, this.maxY_),
|
|
clamp(extent[2], this.minX_, this.maxX_),
|
|
clamp(extent[3], this.minY_, this.maxY_),
|
|
];
|
|
}
|
|
// Transform the extent to get the lon lat ranges for the edges of the extent
|
|
var validExtent = applyTransform(validExtentP, this.toLonLatTransform_, undefined, 8);
|
|
var maxLat = validExtent[3];
|
|
var maxLon = validExtent[2];
|
|
var minLat = validExtent[1];
|
|
var minLon = validExtent[0];
|
|
if (!wrapX) {
|
|
// Check if extremities of the world extent lie inside the extent
|
|
// (for example the pole in a polar projection)
|
|
// and extend the extent as appropriate
|
|
if (containsCoordinate(validExtentP, this.bottomLeft_)) {
|
|
minLon = this.minLon_;
|
|
minLat = this.minLat_;
|
|
}
|
|
if (containsCoordinate(validExtentP, this.bottomRight_)) {
|
|
maxLon = this.maxLon_;
|
|
minLat = this.minLat_;
|
|
}
|
|
if (containsCoordinate(validExtentP, this.topLeft_)) {
|
|
minLon = this.minLon_;
|
|
maxLat = this.maxLat_;
|
|
}
|
|
if (containsCoordinate(validExtentP, this.topRight_)) {
|
|
maxLon = this.maxLon_;
|
|
maxLat = this.maxLat_;
|
|
}
|
|
// The transformed center may also extend the lon lat ranges used for rendering
|
|
maxLat = clamp(maxLat, centerLat, this.maxLat_);
|
|
maxLon = clamp(maxLon, centerLon, this.maxLon_);
|
|
minLat = clamp(minLat, this.minLat_, centerLat);
|
|
minLon = clamp(minLon, this.minLon_, centerLon);
|
|
}
|
|
// Create meridians
|
|
centerLon = Math.floor(centerLon / interval) * interval;
|
|
lon = clamp(centerLon, this.minLon_, this.maxLon_);
|
|
idx = this.addMeridian_(lon, minLat, maxLat, squaredTolerance, extent, 0);
|
|
cnt = 0;
|
|
if (wrapX) {
|
|
while ((lon -= interval) >= minLon && cnt++ < maxLines) {
|
|
idx = this.addMeridian_(lon, minLat, maxLat, squaredTolerance, extent, idx);
|
|
}
|
|
}
|
|
else {
|
|
while (lon != this.minLon_ && cnt++ < maxLines) {
|
|
lon = Math.max(lon - interval, this.minLon_);
|
|
idx = this.addMeridian_(lon, minLat, maxLat, squaredTolerance, extent, idx);
|
|
}
|
|
}
|
|
lon = clamp(centerLon, this.minLon_, this.maxLon_);
|
|
cnt = 0;
|
|
if (wrapX) {
|
|
while ((lon += interval) <= maxLon && cnt++ < maxLines) {
|
|
idx = this.addMeridian_(lon, minLat, maxLat, squaredTolerance, extent, idx);
|
|
}
|
|
}
|
|
else {
|
|
while (lon != this.maxLon_ && cnt++ < maxLines) {
|
|
lon = Math.min(lon + interval, this.maxLon_);
|
|
idx = this.addMeridian_(lon, minLat, maxLat, squaredTolerance, extent, idx);
|
|
}
|
|
}
|
|
this.meridians_.length = idx;
|
|
if (this.meridiansLabels_) {
|
|
this.meridiansLabels_.length = idx;
|
|
}
|
|
// Create parallels
|
|
centerLat = Math.floor(centerLat / interval) * interval;
|
|
lat = clamp(centerLat, this.minLat_, this.maxLat_);
|
|
idx = this.addParallel_(lat, minLon, maxLon, squaredTolerance, extent, 0);
|
|
cnt = 0;
|
|
while (lat != this.minLat_ && cnt++ < maxLines) {
|
|
lat = Math.max(lat - interval, this.minLat_);
|
|
idx = this.addParallel_(lat, minLon, maxLon, squaredTolerance, extent, idx);
|
|
}
|
|
lat = clamp(centerLat, this.minLat_, this.maxLat_);
|
|
cnt = 0;
|
|
while (lat != this.maxLat_ && cnt++ < maxLines) {
|
|
lat = Math.min(lat + interval, this.maxLat_);
|
|
idx = this.addParallel_(lat, minLon, maxLon, squaredTolerance, extent, idx);
|
|
}
|
|
this.parallels_.length = idx;
|
|
if (this.parallelsLabels_) {
|
|
this.parallelsLabels_.length = idx;
|
|
}
|
|
};
|
|
/**
|
|
* @param {number} resolution Resolution.
|
|
* @return {number} The interval in degrees.
|
|
* @private
|
|
*/
|
|
Graticule.prototype.getInterval_ = function (resolution) {
|
|
var centerLon = this.projectionCenterLonLat_[0];
|
|
var centerLat = this.projectionCenterLonLat_[1];
|
|
var interval = -1;
|
|
var target = Math.pow(this.targetSize_ * resolution, 2);
|
|
/** @type {Array<number>} **/
|
|
var p1 = [];
|
|
/** @type {Array<number>} **/
|
|
var p2 = [];
|
|
for (var i = 0, ii = this.intervals_.length; i < ii; ++i) {
|
|
var delta = clamp(this.intervals_[i] / 2, 0, 90);
|
|
// Don't attempt to transform latitudes beyond the poles!
|
|
var clampedLat = clamp(centerLat, -90 + delta, 90 - delta);
|
|
p1[0] = centerLon - delta;
|
|
p1[1] = clampedLat - delta;
|
|
p2[0] = centerLon + delta;
|
|
p2[1] = clampedLat + delta;
|
|
this.fromLonLatTransform_(p1, p1);
|
|
this.fromLonLatTransform_(p2, p2);
|
|
var dist = Math.pow(p2[0] - p1[0], 2) + Math.pow(p2[1] - p1[1], 2);
|
|
if (dist <= target) {
|
|
break;
|
|
}
|
|
interval = this.intervals_[i];
|
|
}
|
|
return interval;
|
|
};
|
|
/**
|
|
* @param {number} lon Longitude.
|
|
* @param {number} minLat Minimal latitude.
|
|
* @param {number} maxLat Maximal latitude.
|
|
* @param {number} squaredTolerance Squared tolerance.
|
|
* @return {LineString} The meridian line string.
|
|
* @param {number} index Index.
|
|
* @private
|
|
*/
|
|
Graticule.prototype.getMeridian_ = function (lon, minLat, maxLat, squaredTolerance, index) {
|
|
var flatCoordinates = meridian(lon, minLat, maxLat, this.projection_, squaredTolerance);
|
|
var lineString = this.meridians_[index];
|
|
if (!lineString) {
|
|
lineString = new LineString(flatCoordinates, GeometryLayout.XY);
|
|
this.meridians_[index] = lineString;
|
|
}
|
|
else {
|
|
lineString.setFlatCoordinates(GeometryLayout.XY, flatCoordinates);
|
|
lineString.changed();
|
|
}
|
|
return lineString;
|
|
};
|
|
/**
|
|
* @param {LineString} lineString Meridian
|
|
* @param {import("../extent.js").Extent} extent Extent.
|
|
* @param {number} index Index.
|
|
* @return {Point} Meridian point.
|
|
* @private
|
|
*/
|
|
Graticule.prototype.getMeridianPoint_ = function (lineString, extent, index) {
|
|
var flatCoordinates = lineString.getFlatCoordinates();
|
|
var bottom = 1;
|
|
var top = flatCoordinates.length - 1;
|
|
if (flatCoordinates[bottom] > flatCoordinates[top]) {
|
|
bottom = top;
|
|
top = 1;
|
|
}
|
|
var clampedBottom = Math.max(extent[1], flatCoordinates[bottom]);
|
|
var clampedTop = Math.min(extent[3], flatCoordinates[top]);
|
|
var lat = clamp(extent[1] + Math.abs(extent[1] - extent[3]) * this.lonLabelPosition_, clampedBottom, clampedTop);
|
|
var coordinate0 = flatCoordinates[bottom - 1] +
|
|
((flatCoordinates[top - 1] - flatCoordinates[bottom - 1]) *
|
|
(lat - flatCoordinates[bottom])) /
|
|
(flatCoordinates[top] - flatCoordinates[bottom]);
|
|
var coordinate = [coordinate0, lat];
|
|
var point = this.meridiansLabels_[index].geom;
|
|
point.setCoordinates(coordinate);
|
|
return point;
|
|
};
|
|
/**
|
|
* Get the list of meridians. Meridians are lines of equal longitude.
|
|
* @return {Array<LineString>} The meridians.
|
|
* @api
|
|
*/
|
|
Graticule.prototype.getMeridians = function () {
|
|
return this.meridians_;
|
|
};
|
|
/**
|
|
* @param {number} lat Latitude.
|
|
* @param {number} minLon Minimal longitude.
|
|
* @param {number} maxLon Maximal longitude.
|
|
* @param {number} squaredTolerance Squared tolerance.
|
|
* @return {LineString} The parallel line string.
|
|
* @param {number} index Index.
|
|
* @private
|
|
*/
|
|
Graticule.prototype.getParallel_ = function (lat, minLon, maxLon, squaredTolerance, index) {
|
|
var flatCoordinates = parallel(lat, minLon, maxLon, this.projection_, squaredTolerance);
|
|
var lineString = this.parallels_[index];
|
|
if (!lineString) {
|
|
lineString = new LineString(flatCoordinates, GeometryLayout.XY);
|
|
}
|
|
else {
|
|
lineString.setFlatCoordinates(GeometryLayout.XY, flatCoordinates);
|
|
lineString.changed();
|
|
}
|
|
return lineString;
|
|
};
|
|
/**
|
|
* @param {LineString} lineString Parallels.
|
|
* @param {import("../extent.js").Extent} extent Extent.
|
|
* @param {number} index Index.
|
|
* @return {Point} Parallel point.
|
|
* @private
|
|
*/
|
|
Graticule.prototype.getParallelPoint_ = function (lineString, extent, index) {
|
|
var flatCoordinates = lineString.getFlatCoordinates();
|
|
var left = 0;
|
|
var right = flatCoordinates.length - 2;
|
|
if (flatCoordinates[left] > flatCoordinates[right]) {
|
|
left = right;
|
|
right = 0;
|
|
}
|
|
var clampedLeft = Math.max(extent[0], flatCoordinates[left]);
|
|
var clampedRight = Math.min(extent[2], flatCoordinates[right]);
|
|
var lon = clamp(extent[0] + Math.abs(extent[0] - extent[2]) * this.latLabelPosition_, clampedLeft, clampedRight);
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var coordinate1 = flatCoordinates[left + 1] +
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((flatCoordinates[right + 1] - flatCoordinates[left + 1]) *
|
|
(lon - flatCoordinates[left])) /
|
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(flatCoordinates[right] - flatCoordinates[left]);
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var coordinate = [lon, coordinate1];
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var point = this.parallelsLabels_[index].geom;
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point.setCoordinates(coordinate);
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return point;
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|
};
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|
/**
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|
* Get the list of parallels. Parallels are lines of equal latitude.
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* @return {Array<LineString>} The parallels.
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|
* @api
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|
*/
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|
Graticule.prototype.getParallels = function () {
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|
return this.parallels_;
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|
};
|
|
/**
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|
* @param {import("../proj/Projection.js").default} projection Projection.
|
|
* @private
|
|
*/
|
|
Graticule.prototype.updateProjectionInfo_ = function (projection) {
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|
var epsg4326Projection = getProjection('EPSG:4326');
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|
var worldExtent = projection.getWorldExtent();
|
|
this.maxLat_ = worldExtent[3];
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|
this.maxLon_ = worldExtent[2];
|
|
this.minLat_ = worldExtent[1];
|
|
this.minLon_ = worldExtent[0];
|
|
// If the world extent crosses the dateline define a custom transform to
|
|
// return longitudes which wrap the dateline
|
|
var toLonLatTransform = getTransform(projection, epsg4326Projection);
|
|
if (this.minLon_ < this.maxLon_) {
|
|
this.toLonLatTransform_ = toLonLatTransform;
|
|
}
|
|
else {
|
|
var split_1 = this.minLon_ + this.maxLon_ / 2;
|
|
this.maxLon_ += 360;
|
|
this.toLonLatTransform_ = function (coordinates, opt_output, opt_dimension) {
|
|
var dimension = opt_dimension || 2;
|
|
var lonLatCoordinates = toLonLatTransform(coordinates, opt_output, dimension);
|
|
for (var i = 0, l = lonLatCoordinates.length; i < l; i += dimension) {
|
|
if (lonLatCoordinates[i] < split_1) {
|
|
lonLatCoordinates[i] += 360;
|
|
}
|
|
}
|
|
return lonLatCoordinates;
|
|
};
|
|
}
|
|
// Transform the extent to get the limits of the view projection extent
|
|
// which should be available to the graticule
|
|
this.fromLonLatTransform_ = getTransform(epsg4326Projection, projection);
|
|
var worldExtentP = applyTransform([this.minLon_, this.minLat_, this.maxLon_, this.maxLat_], this.fromLonLatTransform_, undefined, 8);
|
|
this.minX_ = worldExtentP[0];
|
|
this.maxX_ = worldExtentP[2];
|
|
this.minY_ = worldExtentP[1];
|
|
this.maxY_ = worldExtentP[3];
|
|
// Determine the view projection coordinates of the extremities of the world extent
|
|
// as these may lie inside a view extent (for example the pole in a polar projection)
|
|
this.bottomLeft_ = this.fromLonLatTransform_([this.minLon_, this.minLat_]);
|
|
this.bottomRight_ = this.fromLonLatTransform_([this.maxLon_, this.minLat_]);
|
|
this.topLeft_ = this.fromLonLatTransform_([this.minLon_, this.maxLat_]);
|
|
this.topRight_ = this.fromLonLatTransform_([this.maxLon_, this.maxLat_]);
|
|
// Transform the projection center to lon lat
|
|
// Some projections may have a void area at the poles
|
|
// so replace any NaN latitudes with the min or max value closest to a pole
|
|
this.projectionCenterLonLat_ = this.toLonLatTransform_(getCenter(projection.getExtent()));
|
|
if (isNaN(this.projectionCenterLonLat_[1])) {
|
|
this.projectionCenterLonLat_[1] =
|
|
Math.abs(this.maxLat_) >= Math.abs(this.minLat_)
|
|
? this.maxLat_
|
|
: this.minLat_;
|
|
}
|
|
this.projection_ = projection;
|
|
};
|
|
return Graticule;
|
|
}(VectorLayer));
|
|
export default Graticule;
|
|
//# sourceMappingURL=Graticule.js.map
|