iceye-angular-cesium-fork
Version:
Angular library for working with Cesium.
86 lines • 15.9 kB
JavaScript
import { Injectable } from '@angular/core';
import { CesiumService } from '../cesium/cesium.service';
export class GeoUtilsService {
constructor(cesiumService) {
this.cesiumService = cesiumService;
}
static pointByLocationDistanceAndAzimuth(currentLocation, meterDistance, radianAzimuth, deprecated) {
const distance = meterDistance / Cesium.Ellipsoid.WGS84.maximumRadius;
const cartographicLocation = currentLocation instanceof Cesium.Cartesian3 ? Cesium.Cartographic.fromCartesian(currentLocation) : currentLocation;
const cartesianLocation = currentLocation instanceof Cesium.Cartesian3
? currentLocation
: Cesium.Cartesian3.fromRadians(currentLocation.longitude, currentLocation.latitude, currentLocation.height);
let resultPosition;
let resultDistance;
let counter = 0;
let distanceFactorRangeMax = 0.1;
let distanceFactorRangeMin = -0.1;
while (counter === 0 ||
(counter < 16 && Math.max(resultDistance, meterDistance) / Math.min(resultDistance, meterDistance) > 1.000001)) {
const factor = distanceFactorRangeMin + (distanceFactorRangeMax - distanceFactorRangeMin) / 2;
resultPosition = GeoUtilsService._pointByLocationDistanceAndAzimuth(cartographicLocation, distance * (1 + factor), radianAzimuth);
resultDistance = this.distance(cartesianLocation, resultPosition);
if (resultDistance > meterDistance) {
distanceFactorRangeMax = distanceFactorRangeMin + (distanceFactorRangeMax - distanceFactorRangeMin) / 2;
}
else {
distanceFactorRangeMin = distanceFactorRangeMin + (distanceFactorRangeMax - distanceFactorRangeMin) / 2;
}
counter++;
}
return resultPosition;
}
static _pointByLocationDistanceAndAzimuth(cartographicLocation, distance, radianAzimuth) {
const curLat = cartographicLocation.latitude;
const curLon = cartographicLocation.longitude;
const destinationLat = Math.asin(Math.sin(curLat) * Math.cos(distance) + Math.cos(curLat) * Math.sin(distance) * Math.cos(radianAzimuth));
let destinationLon = curLon +
Math.atan2(Math.sin(radianAzimuth) * Math.sin(distance) * Math.cos(curLat), Math.cos(distance) - Math.sin(curLat) * Math.sin(destinationLat));
destinationLon = ((destinationLon + 3 * Math.PI) % (2 * Math.PI)) - Math.PI;
return Cesium.Cartesian3.fromRadians(destinationLon, destinationLat);
}
static distance(pos0, pos1) {
return Cesium.Cartesian3.distance(pos0, pos1);
}
static getPositionsDelta(position0, position1) {
return {
x: position1.x - position0.x,
y: position1.y - position0.y,
z: position1.z - position0.z,
};
}
static addDeltaToPosition(position, delta, updateReference = false) {
if (updateReference) {
position.x += delta.x;
position.y += delta.y;
position.z += delta.z;
const cartographic = Cesium.Cartographic.fromCartesian(position);
cartographic.height = 0;
const cartesian = Cesium.Cartesian3.fromRadians(cartographic.longitude, cartographic.latitude, cartographic.height);
position.x = cartesian.x;
position.y = cartesian.y;
position.z = cartesian.z;
return position;
}
else {
const cartesian = new Cesium.Cartesian3(position.x + delta.x, position.y + delta.y, position.z + delta.z);
const cartographic = Cesium.Cartographic.fromCartesian(cartesian);
cartographic.height = 0;
return Cesium.Cartesian3.fromRadians(cartographic.longitude, cartographic.latitude, cartographic.height);
}
}
static middleCartesian3Point(position0, position1) {
return new Cesium.Cartesian3(position1.x - position0.x / 2, position1.y - position0.y / 2, position1.z - position0.z / 2);
}
screenPositionToCartesian3(screenPos) {
const camera = this.cesiumService.getViewer().camera;
return camera.pickEllipsoid(screenPos);
}
}
GeoUtilsService.decorators = [
{ type: Injectable }
];
GeoUtilsService.ctorParameters = () => [
{ type: CesiumService }
];
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Cesium.Cartographic.fromCartesian(currentLocation) : currentLocation;\n    const cartesianLocation =\n      currentLocation instanceof Cesium.Cartesian3\n        ? currentLocation\n        : Cesium.Cartesian3.fromRadians(currentLocation.longitude, currentLocation.latitude, currentLocation.height);\n\n    let resultPosition;\n    let resultDistance;\n    let counter = 0;\n    let distanceFactorRangeMax = 0.1;\n    let distanceFactorRangeMin = -0.1;\n    while (\n      counter === 0 ||\n      (counter < 16 && Math.max(resultDistance, meterDistance) / Math.min(resultDistance, meterDistance) > 1.000001)\n      ) {\n      const factor = distanceFactorRangeMin + (distanceFactorRangeMax - distanceFactorRangeMin) / 2;\n      resultPosition = GeoUtilsService._pointByLocationDistanceAndAzimuth(cartographicLocation, distance * (1 + factor), radianAzimuth);\n      resultDistance = this.distance(cartesianLocation, resultPosition);\n\n      if (resultDistance > meterDistance) {\n        distanceFactorRangeMax = distanceFactorRangeMin + (distanceFactorRangeMax - distanceFactorRangeMin) / 2;\n      } else {\n        distanceFactorRangeMin = distanceFactorRangeMin + (distanceFactorRangeMax - distanceFactorRangeMin) / 2;\n      }\n      counter++;\n    }\n\n    return resultPosition;\n  }\n\n  static _pointByLocationDistanceAndAzimuth(cartographicLocation: any, distance: number, radianAzimuth: number) {\n    const curLat = cartographicLocation.latitude;\n    const curLon = cartographicLocation.longitude;\n    const destinationLat = Math.asin(\n      Math.sin(curLat) * Math.cos(distance) + Math.cos(curLat) * Math.sin(distance) * Math.cos(radianAzimuth),\n    );\n\n    let destinationLon =\n      curLon +\n      Math.atan2(\n        Math.sin(radianAzimuth) * Math.sin(distance) * Math.cos(curLat),\n        Math.cos(distance) - Math.sin(curLat) * Math.sin(destinationLat),\n      );\n\n    destinationLon = ((destinationLon + 3 * Math.PI) % (2 * Math.PI)) - Math.PI;\n\n    return Cesium.Cartesian3.fromRadians(destinationLon, destinationLat);\n  }\n\n  static distance(pos0: Cartesian3, pos1: Cartesian3): number {\n    return Cesium.Cartesian3.distance(pos0, pos1);\n  }\n\n  static getPositionsDelta(position0: Cartesian3, position1: Cartesian3): Vec3 {\n    return {\n      x: position1.x - position0.x,\n      y: position1.y - position0.y,\n      z: position1.z - position0.z,\n    };\n  }\n\n  static addDeltaToPosition(position: Cartesian3, delta: Vec3, updateReference = false): Cartesian3 {\n    if (updateReference) {\n      position.x += delta.x;\n      position.y += delta.y;\n      position.z += delta.z;\n      const cartographic = Cesium.Cartographic.fromCartesian(position);\n      cartographic.height = 0;\n      const cartesian = Cesium.Cartesian3.fromRadians(cartographic.longitude, cartographic.latitude, cartographic.height);\n      position.x = cartesian.x;\n      position.y = cartesian.y;\n      position.z = cartesian.z;\n      return position;\n    } else {\n      const cartesian = new Cesium.Cartesian3(position.x + delta.x, position.y + delta.y, position.z + delta.z);\n      const cartographic = Cesium.Cartographic.fromCartesian(cartesian);\n      cartographic.height = 0;\n      return Cesium.Cartesian3.fromRadians(cartographic.longitude, cartographic.latitude, cartographic.height);\n    }\n  }\n\n  static middleCartesian3Point(position0: Cartesian3, position1: Cartesian3) {\n    return new Cesium.Cartesian3(position1.x - position0.x / 2, position1.y - position0.y / 2, position1.z - position0.z / 2);\n  }\n\n  constructor(private cesiumService: CesiumService) {\n  }\n\n  screenPositionToCartesian3(screenPos: { x: number; y: number }) {\n    const camera = this.cesiumService.getViewer().camera;\n    return camera.pickEllipsoid(screenPos);\n  }\n}\n"]}