angular-cesium
Version:
Angular library for working with Cesium.
135 lines • 19.5 kB
JavaScript
import { Injectable, Optional } from '@angular/core';
import { CesiumService } from '../cesium/cesium.service';
import * as geodesy from 'geodesy';
import { LatLonEllipsoidal, Utm } from 'geodesy';
const LatLonVectors = geodesy['LatLonVectors']; // doesnt exists on typings
window['geodesy'] = geodesy;
/**
* Given different types of coordinates, we provide you a service converting those types to the most common other types.
* We are using the geodesy implementation of UTM conversion. see: https://github.com/chrisveness/geodesy.
*
* @example
* import { Component, OnInit } from '@angular/core';
* import { CoordinateConverter } from 'angular2-cesium';
*
* @Component({
* selector:'my-component',
* template:'<div>{{showCartographic}}</div>',
* providers:[CoordinateConverter]
* })
* export class MyComponent implements OnInit {
* showCartographic;
*
* constructor(private coordinateConverter:CoordinateConverter){
* }
*
* ngOnInit(){
* this.showCartographic = this.coordinateConverter.degreesToCartographic(5, 5, 5);
* }
* }
*
*/
export class CoordinateConverter {
constructor(cesiumService) {
this.cesiumService = cesiumService;
}
static cartesian3ToLatLon(cartesian3, ellipsoid) {
const cart = Cesium.Cartographic.fromCartesian(cartesian3, ellipsoid);
return {
lon: Cesium.Math.toDegrees(cart.longitude),
lat: Cesium.Math.toDegrees(cart.latitude),
height: cart.height
};
}
screenToCartesian3(screenPos, addMapCanvasBoundsToPos) {
if (!this.cesiumService) {
throw new Error('ANGULAR2-CESIUM - Cesium service should be provided in order' +
' to do screen position calculations');
}
else {
const screenPosition = Object.assign({}, screenPos);
if (addMapCanvasBoundsToPos) {
const mapBounds = this.cesiumService.getViewer().canvas.getBoundingClientRect();
screenPosition.x += mapBounds.left;
screenPosition.y += mapBounds.top;
}
const camera = this.cesiumService.getViewer().camera;
return camera.pickEllipsoid(screenPosition);
}
}
screenToCartographic(screenPos, ellipsoid) {
return this.cartesian3ToCartographic(this.screenToCartesian3(screenPos), ellipsoid);
}
cartesian3ToCartographic(cartesian, ellipsoid) {
return Cesium.Cartographic.fromCartesian(cartesian, ellipsoid);
}
degreesToCartographic(longitude, latitude, height) {
return Cesium.Cartographic.fromDegrees(longitude, latitude, height);
}
radiansToCartographic(longitude, latitude, height) {
return Cesium.Cartographic.fromRadians(longitude, latitude, height);
}
degreesToUTM(longitude, latitude) {
return new LatLonEllipsoidal(latitude, longitude).toUtm();
}
UTMToDegrees(zone, hemisphereType, easting, northing) {
return this.geodesyToCesiumObject(new Utm(zone, hemisphereType, easting, northing).toLatLonE());
}
geodesyToCesiumObject(geodesyRadians) {
return {
longitude: geodesyRadians.lon,
latitude: geodesyRadians.lat,
height: geodesyRadians['height'] ? geodesyRadians['height'] : 0
};
}
/**
* middle point between two points
* @param first (latitude,longitude) in radians
* @param second (latitude,longitude) in radians
*/
midPointToCartesian3(first, second) {
const toDeg = (rad) => Cesium.Math.toDegrees(rad);
const firstPoint = new LatLonVectors(toDeg(first.latitude), toDeg(first.longitude));
const secondPoint = new LatLonVectors(toDeg(second.latitude), toDeg(second.longitude));
const middlePoint = firstPoint.midpointTo(secondPoint);
return Cesium.Cartesian3.fromDegrees(middlePoint.lon, middlePoint.lat);
}
middlePointByScreen(position0, position1) {
const scene = this.cesiumService.getScene();
const screenPosition1 = Cesium.SceneTransforms.wgs84ToWindowCoordinates(scene, position0);
const screenPosition2 = Cesium.SceneTransforms.wgs84ToWindowCoordinates(scene, position1);
const middleScreenPoint = new Cesium.Cartesian2((screenPosition2.x + screenPosition1.x) / 2.0, (screenPosition2.y + screenPosition1.y) / 2.0);
return scene.pickPosition(middleScreenPoint);
}
/**
* initial bearing between two points
*
* * @return bearing in degrees
* @param first - {latitude,longitude} in radians
* @param second - {latitude,longitude} in radians
*/
bearingTo(first, second) {
const toDeg = (rad) => Cesium.Math.toDegrees(rad);
const firstPoint = new LatLonVectors(toDeg(first.latitude), toDeg(first.longitude));
const secondPoint = new LatLonVectors(toDeg(second.latitude), toDeg(second.longitude));
const bearing = firstPoint.bearingTo(secondPoint);
return bearing;
}
/**
* initial bearing between two points
*
* @return bearing in degrees
*/
bearingToCartesian(firstCartesian3, secondCartesian3) {
const firstCart = Cesium.Cartographic.fromCartesian(firstCartesian3);
const secondCart = Cesium.Cartographic.fromCartesian(secondCartesian3);
return this.bearingTo(firstCart, secondCart);
}
}
CoordinateConverter.decorators = [
{ type: Injectable }
];
CoordinateConverter.ctorParameters = () => [
{ type: CesiumService, decorators: [{ type: Optional }] }
];
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// doesnt exists on typings\r\n\r\nwindow['geodesy'] = geodesy;\r\n\r\n/**\r\n *  Given different types of coordinates, we provide you a service converting those types to the most common other types.\r\n *  We are using the geodesy implementation of UTM conversion. see: https://github.com/chrisveness/geodesy.\r\n *\r\n * @example\r\n * import { Component, OnInit } from '@angular/core';\r\n * import { CoordinateConverter } from 'angular2-cesium';\r\n *\r\n * @Component({\r\n * \t\tselector:'my-component',\r\n * \t\ttemplate:'<div>{{showCartographic}}</div>',\r\n * \t\tproviders:[CoordinateConverter]\r\n * })\r\n * export class MyComponent implements OnInit {\r\n * \t\tshowCartographic;\r\n *\r\n * \t\tconstructor(private coordinateConverter:CoordinateConverter){\r\n * \t\t}\r\n *\r\n * \t\tngOnInit(){\r\n * \t\t\tthis.showCartographic = this.coordinateConverter.degreesToCartographic(5, 5, 5);\r\n *  }\r\n * }\r\n *\r\n */\r\n@Injectable()\r\nexport class CoordinateConverter {\r\n  constructor(@Optional() private cesiumService?: CesiumService) {\r\n  }\r\n\r\n  static cartesian3ToLatLon(cartesian3: Cartesian3, ellipsoid?: any): {lon: number, lat: number; height: number} {\r\n    const cart = Cesium.Cartographic.fromCartesian(cartesian3, ellipsoid);\r\n    return {\r\n      lon: Cesium.Math.toDegrees(cart.longitude),\r\n      lat: Cesium.Math.toDegrees(cart.latitude),\r\n      height: cart.height\r\n    };\r\n  }\r\n\r\n  screenToCartesian3(screenPos: { x: number, y: number }, addMapCanvasBoundsToPos?: boolean) {\r\n    if (!this.cesiumService) {\r\n      throw new Error('ANGULAR2-CESIUM - Cesium service should be provided in order' +\r\n        ' to do screen position calculations');\r\n    } else {\r\n      const screenPosition = { ...screenPos };\r\n      if (addMapCanvasBoundsToPos) {\r\n        const mapBounds = this.cesiumService.getViewer().canvas.getBoundingClientRect();\r\n        screenPosition.x += mapBounds.left;\r\n        screenPosition.y += mapBounds.top;\r\n      }\r\n\r\n      const camera = this.cesiumService.getViewer().camera;\r\n      return camera.pickEllipsoid(screenPosition);\r\n    }\r\n  }\r\n\r\n  screenToCartographic(screenPos: { x: number, y: number }, ellipsoid?: any) {\r\n    return this.cartesian3ToCartographic(this.screenToCartesian3(screenPos), ellipsoid);\r\n  }\r\n\r\n  cartesian3ToCartographic(cartesian: Cartesian3, ellipsoid?: any) {\r\n    return Cesium.Cartographic.fromCartesian(cartesian, ellipsoid);\r\n  }\r\n\r\n  degreesToCartographic(longitude: number, latitude: number, height?: number) {\r\n    return Cesium.Cartographic.fromDegrees(longitude, latitude, height);\r\n  }\r\n\r\n  radiansToCartographic(longitude: number, latitude: number, height?: number) {\r\n    return Cesium.Cartographic.fromRadians(longitude, latitude, height);\r\n  }\r\n\r\n  degreesToUTM(longitude: number, latitude: number) {\r\n    return new LatLonEllipsoidal(latitude, longitude).toUtm();\r\n  }\r\n\r\n  UTMToDegrees(zone: number, hemisphereType: hemisphere, easting: number, northing: number) {\r\n    return this.geodesyToCesiumObject(new Utm(zone, hemisphereType, easting, northing).toLatLonE());\r\n  }\r\n\r\n  private geodesyToCesiumObject(geodesyRadians: LatLon) {\r\n    return {\r\n      longitude: geodesyRadians.lon,\r\n      latitude: geodesyRadians.lat,\r\n      height: geodesyRadians['height'] ? geodesyRadians['height'] : 0\r\n    };\r\n  }\r\n\r\n  /**\r\n   * middle point between two points\r\n   * @param first  (latitude,longitude) in radians\r\n   * @param second (latitude,longitude) in radians\r\n   */\r\n  midPointToCartesian3(first: { latitude: number, longitude: number }, second: { latitude: number, longitude: number }) {\r\n    const toDeg = (rad: number) => Cesium.Math.toDegrees(rad);\r\n    const firstPoint = new LatLonVectors(toDeg(first.latitude), toDeg(first.longitude));\r\n    const secondPoint = new LatLonVectors(toDeg(second.latitude), toDeg(second.longitude));\r\n    const middlePoint: any = firstPoint.midpointTo(secondPoint);\r\n\r\n    return Cesium.Cartesian3.fromDegrees(middlePoint.lon, middlePoint.lat);\r\n  }\r\n\r\n  middlePointByScreen(position0: Cartesian3, position1: Cartesian3): Cartesian3 {\r\n    const scene = this.cesiumService.getScene();\r\n    const screenPosition1 = Cesium.SceneTransforms.wgs84ToWindowCoordinates(scene, position0);\r\n    const screenPosition2 = Cesium.SceneTransforms.wgs84ToWindowCoordinates(scene, position1);\r\n    const middleScreenPoint =\r\n      new Cesium.Cartesian2((screenPosition2.x + screenPosition1.x) / 2.0, (screenPosition2.y + screenPosition1.y) / 2.0);\r\n    return scene.pickPosition(middleScreenPoint);\r\n  }\r\n\r\n  /**\r\n   * initial bearing between two points\r\n   *\r\n   * * @return bearing in degrees\r\n   * @param first - {latitude,longitude} in radians\r\n   * @param second - {latitude,longitude} in radians\r\n   */\r\n  bearingTo(first: { latitude: number, longitude: number }, second: { latitude: number, longitude: number }) {\r\n    const toDeg = (rad: number) => Cesium.Math.toDegrees(rad);\r\n    const firstPoint = new LatLonVectors(toDeg(first.latitude), toDeg(first.longitude));\r\n    const secondPoint = new LatLonVectors(toDeg(second.latitude), toDeg(second.longitude));\r\n    const bearing = firstPoint.bearingTo(secondPoint);\r\n\r\n    return bearing;\r\n  }\r\n\r\n  /**\r\n   * initial bearing between two points\r\n   *\r\n   * @return bearing in degrees\r\n   */\r\n  bearingToCartesian(firstCartesian3: Cartesian3, secondCartesian3: Cartesian3) {\r\n    const firstCart = Cesium.Cartographic.fromCartesian(firstCartesian3);\r\n    const secondCart = Cesium.Cartographic.fromCartesian(secondCartesian3);\r\n\r\n    return this.bearingTo(firstCart, secondCart);\r\n  }\r\n}\r\n"]}