angular-cesium
Version:
Angular library for working with Cesium.
266 lines • 31.5 kB
JavaScript
import { Injectable } from '@angular/core';
import { SceneMode } from '../../models/scene-mode.enum';
/**
* The service exposes the scene's camera and screenSpaceCameraController
* SceneMode.PERFORMANCE_SCENE2D - is a 3D scene mode that acts like Cesium 2D mode,
* but is more efficient performance wise.
*/
export class CameraService {
constructor() {
this.isSceneModePerformance2D = false;
}
init(cesiumService) {
this.viewer = cesiumService.getViewer();
this.scene = cesiumService.getScene();
this.screenSpaceCameraController = this.scene.screenSpaceCameraController;
this.camera = this.scene.camera;
this.lastRotate = this.screenSpaceCameraController.enableRotate;
this.lastTilt = this.screenSpaceCameraController.enableTilt;
this.lastLook = this.screenSpaceCameraController.enableLook;
}
_listenToSceneModeMorph(callback) {
this.morphListenerCancelFn = this.scene.morphStart.addEventListener(callback);
}
_revertCameraProperties() {
this.isSceneModePerformance2D = false;
this.enableTilt(this.lastTilt);
this.enableRotate(this.lastRotate);
this.enableLook(this.lastLook);
}
/**
* Gets the scene's camera
*/
getCamera() {
return this.camera;
}
/**
* Gets the scene's screenSpaceCameraController
*/
getScreenSpaceCameraController() {
return this.screenSpaceCameraController;
}
/**
* Gets the minimum zoom value in meters
*/
getMinimumZoom() {
return this.screenSpaceCameraController.minimumZoomDistance;
}
/**
* Sets the minimum zoom value in meters
* @param zoom amount
*/
setMinimumZoom(amount) {
this.screenSpaceCameraController.minimumZoomDistance = amount;
}
/**
* Gets the maximum zoom value in meters
*/
getMaximumZoom() {
return this.screenSpaceCameraController.maximumZoomDistance;
}
/**
* Sets the maximum zoom value in meters
* @param zoom amount
*/
setMaximumZoom(amount) {
this.screenSpaceCameraController.maximumZoomDistance = amount;
}
/**
* Sets if the camera is able to tilt
*/
enableTilt(tilt) {
this.screenSpaceCameraController.enableTilt = tilt;
}
/**
* Sets if the camera is able to rotate
*/
enableRotate(rotate) {
this.screenSpaceCameraController.enableRotate = rotate;
}
/**
* Sets if the camera is able to free-look
*/
enableLook(lock) {
this.screenSpaceCameraController.enableLook = lock;
}
/**
* Sets if the camera is able to translate
*/
enableTranslate(translate) {
this.screenSpaceCameraController.enableTranslate = translate;
}
/**
* Sets if the camera is able to zoom
*/
enableZoom(zoom) {
this.screenSpaceCameraController.enableZoom = zoom;
}
/**
* Sets if the camera receives inputs
*/
enableInputs(inputs) {
this.screenSpaceCameraController.enableInputs = inputs;
}
/**
* Sets the map's SceneMode
* @param sceneMode - The SceneMode to morph the scene into.
* @param duration - The duration of scene morph animations, in seconds
*/
setSceneMode(sceneMode, duration) {
switch (sceneMode) {
case SceneMode.SCENE3D: {
if (this.isSceneModePerformance2D) {
this._revertCameraProperties();
}
this.scene.morphTo3D(duration);
break;
}
case SceneMode.COLUMBUS_VIEW: {
if (this.isSceneModePerformance2D) {
this._revertCameraProperties();
}
this.scene.morphToColumbusView(duration);
break;
}
case SceneMode.SCENE2D: {
if (this.isSceneModePerformance2D) {
this._revertCameraProperties();
}
this.scene.morphTo2D(duration);
break;
}
case SceneMode.PERFORMANCE_SCENE2D: {
this.isSceneModePerformance2D = true;
this.lastLook = this.screenSpaceCameraController.enableLook;
this.lastTilt = this.screenSpaceCameraController.enableTilt;
this.lastRotate = this.screenSpaceCameraController.enableRotate;
this.screenSpaceCameraController.enableTilt = false;
this.screenSpaceCameraController.enableRotate = false;
this.screenSpaceCameraController.enableLook = false;
if (this.morphListenerCancelFn) {
this.morphListenerCancelFn();
}
this.scene.morphToColumbusView(duration);
const morphCompleteEventListener = this.scene.morphComplete.addEventListener(() => {
this.camera.setView({
destination: Cesium.Cartesian3.fromDegrees(0.0, 0.0, Math.min(CameraService.PERFORMANCE_2D_ALTITUDE, this.getMaximumZoom())),
orientation: {
pitch: Cesium.Math.toRadians(-90)
}
});
morphCompleteEventListener();
this._listenToSceneModeMorph(this._revertCameraProperties.bind(this));
});
break;
}
}
}
/**
* Flies the camera to a destination
* API: https://cesiumjs.org/Cesium/Build/Documentation/Camera.html?classFilter=cam#flyTo
*/
cameraFlyTo(options) {
return this.camera.flyTo(options);
}
/**
* Flies the camera to a target
* API: https://cesiumjs.org/Cesium/Build/Documentation/Viewer.html?classFilter=viewer#flyTo
* @returns Promise<boolean>
*/
flyTo(target, options) {
return this.viewer.flyTo(target, options);
}
/**
* Zooms amount along the camera's view vector.
* API: https://cesiumjs.org/Cesium/Build/Documentation/Camera.html#zoomIn
*/
zoomIn(amount) {
return this.camera.zoomIn(amount || this.camera.defaultZoomAmount);
}
/**
* Zooms amount along the opposite direction of the camera's view vector.
* API: https://cesiumjs.org/Cesium/Build/Documentation/Camera.html#zoomOut
*/
zoomOut(amount) {
return this.camera.zoomOut(amount || this.camera.defaultZoomAmount);
}
/**
* Zoom the camera to a target
* API: https://cesiumjs.org/Cesium/Build/Documentation/Viewer.html?classFilter=viewer#zoomTo
* @returns Promise<boolean>
*/
zoomTo(target, offset) {
return this.viewer.zoomTo(target, offset);
}
/**
* Flies the camera to a destination
* API: https://cesiumjs.org/Cesium/Build/Documentation/Camera.html?classFilter=camera#setView
* @param options viewer options
*/
setView(options) {
this.camera.setView(options);
}
/**
* Set camera's rotation
*/
setRotation(degreesInRadians) {
this.setView({ orientation: { heading: degreesInRadians } });
}
/**
* Locks or unlocks camera rotation
*/
lockRotation(lock) {
this.scene.screenSpaceCameraController.enableRotate = !lock;
}
/**
* Make the camera track a specific entity
* API: https://cesiumjs.org/Cesium/Build/Documentation/Viewer.html?classFilter=viewer#trackedEntity
* @param cesiumEntity - cesium entity( billboard, polygon...) to track
* @param options - track entity options
*/
trackEntity(cesiumEntity, options) {
const flyTo = (options && options.flyTo) || false;
this.viewer.trackedEntity = undefined;
return new Promise(resolve => {
if (flyTo) {
const flyToDuration = (options && options.flyToDuration) || 1;
const altitude = (options && options.altitude) || 10000;
// Calc entity flyTo position and wanted altitude
const entPosCar3 = cesiumEntity.position.getValue(Cesium.JulianDate.now());
const entPosCart = Cesium.Cartographic.fromCartesian(entPosCar3);
const zoomAmount = altitude - entPosCart.height;
entPosCart.height = altitude;
const flyToPosition = Cesium.Cartesian3.fromRadians(entPosCart.longitude, entPosCart.latitude, entPosCart.height);
this.cameraFlyTo({
duration: flyToDuration,
destination: flyToPosition,
complete: () => {
this.viewer.trackedEntity = cesiumEntity;
setTimeout(() => {
if (zoomAmount > 0) {
this.camera.zoomOut(zoomAmount);
}
else {
this.camera.zoomIn(zoomAmount);
}
}, 0);
resolve();
}
});
}
else {
this.viewer.trackedEntity = cesiumEntity;
resolve();
}
});
}
untrackEntity() {
this.trackEntity();
}
}
CameraService.PERFORMANCE_2D_ALTITUDE = 25000000;
CameraService.decorators = [
{ type: Injectable }
];
CameraService.ctorParameters = () => [];
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{ Injectable } from '@angular/core';\r\nimport { CesiumService } from '../cesium/cesium.service';\r\nimport { SceneMode } from '../../models/scene-mode.enum';\r\n\r\n/**\r\n *  The service exposes the scene's camera and screenSpaceCameraController\r\n *  SceneMode.PERFORMANCE_SCENE2D -  is a 3D scene mode that acts like Cesium 2D mode,\r\n *  but is more efficient performance wise.\r\n */\r\n@Injectable()\r\nexport class CameraService {\r\n  static PERFORMANCE_2D_ALTITUDE = 25000000;\r\n\r\n  private viewer: any;\r\n  private scene: any;\r\n  private camera: any;\r\n  private screenSpaceCameraController: any;\r\n  private morphListenerCancelFn: any;\r\n  private lastRotate: boolean;\r\n  private lastTilt: boolean;\r\n  private lastLook: boolean;\r\n  private isSceneModePerformance2D = false;\r\n\r\n  constructor() {\r\n  }\r\n\r\n  init(cesiumService: CesiumService) {\r\n    this.viewer = cesiumService.getViewer();\r\n    this.scene = cesiumService.getScene();\r\n    this.screenSpaceCameraController = this.scene.screenSpaceCameraController;\r\n    this.camera = this.scene.camera;\r\n    this.lastRotate = this.screenSpaceCameraController.enableRotate;\r\n    this.lastTilt = this.screenSpaceCameraController.enableTilt;\r\n    this.lastLook = this.screenSpaceCameraController.enableLook;\r\n  }\r\n\r\n  _listenToSceneModeMorph(callback: Function) {\r\n    this.morphListenerCancelFn = this.scene.morphStart.addEventListener(\r\n      callback\r\n    );\r\n  }\r\n\r\n  _revertCameraProperties() {\r\n    this.isSceneModePerformance2D = false;\r\n    this.enableTilt(this.lastTilt);\r\n    this.enableRotate(this.lastRotate);\r\n    this.enableLook(this.lastLook);\r\n  }\r\n\r\n  /**\r\n   * Gets the scene's camera\r\n   */\r\n  getCamera() {\r\n    return this.camera;\r\n  }\r\n\r\n  /**\r\n   * Gets the scene's screenSpaceCameraController\r\n   */\r\n  getScreenSpaceCameraController() {\r\n    return this.screenSpaceCameraController;\r\n  }\r\n\r\n  /**\r\n   * Gets the minimum zoom value in meters\r\n   */\r\n  getMinimumZoom(): number {\r\n    return this.screenSpaceCameraController.minimumZoomDistance;\r\n  }\r\n\r\n  /**\r\n   * Sets the minimum zoom value in meters\r\n   * @param zoom amount\r\n   */\r\n  setMinimumZoom(amount: number): void {\r\n    this.screenSpaceCameraController.minimumZoomDistance = amount;\r\n  }\r\n\r\n  /**\r\n   * Gets the maximum zoom value in meters\r\n   */\r\n  getMaximumZoom(): number {\r\n    return this.screenSpaceCameraController.maximumZoomDistance;\r\n  }\r\n\r\n  /**\r\n   * Sets the maximum zoom value in meters\r\n   * @param zoom amount\r\n   */\r\n  setMaximumZoom(amount: number): void {\r\n    this.screenSpaceCameraController.maximumZoomDistance = amount;\r\n  }\r\n\r\n  /**\r\n   * Sets if the camera is able to tilt\r\n   */\r\n  enableTilt(tilt: boolean): void {\r\n    this.screenSpaceCameraController.enableTilt = tilt;\r\n  }\r\n\r\n  /**\r\n   * Sets if the camera is able to rotate\r\n   */\r\n  enableRotate(rotate: boolean): void {\r\n    this.screenSpaceCameraController.enableRotate = rotate;\r\n  }\r\n\r\n  /**\r\n   * Sets if the camera is able to free-look\r\n   */\r\n  enableLook(lock: boolean): void {\r\n    this.screenSpaceCameraController.enableLook = lock;\r\n  }\r\n\r\n  /**\r\n   * Sets if the camera is able to translate\r\n   */\r\n  enableTranslate(translate: boolean): void {\r\n    this.screenSpaceCameraController.enableTranslate = translate;\r\n  }\r\n\r\n  /**\r\n   * Sets if the camera is able to zoom\r\n   */\r\n  enableZoom(zoom: boolean): void {\r\n    this.screenSpaceCameraController.enableZoom = zoom;\r\n  }\r\n\r\n  /**\r\n   * Sets if the camera receives inputs\r\n   */\r\n  enableInputs(inputs: boolean): void {\r\n    this.screenSpaceCameraController.enableInputs = inputs;\r\n  }\r\n\r\n  /**\r\n   * Sets the map's SceneMode\r\n   * @param sceneMode - The SceneMode to morph the scene into.\r\n   * @param duration - The duration of scene morph animations, in seconds\r\n   */\r\n  setSceneMode(sceneMode: SceneMode, duration?: number) {\r\n    switch (sceneMode) {\r\n      case SceneMode.SCENE3D: {\r\n        if (this.isSceneModePerformance2D) {\r\n          this._revertCameraProperties();\r\n        }\r\n\r\n        this.scene.morphTo3D(duration);\r\n\r\n        break;\r\n      }\r\n      case SceneMode.COLUMBUS_VIEW: {\r\n        if (this.isSceneModePerformance2D) {\r\n          this._revertCameraProperties();\r\n        }\r\n\r\n        this.scene.morphToColumbusView(duration);\r\n\r\n        break;\r\n      }\r\n      case SceneMode.SCENE2D: {\r\n        if (this.isSceneModePerformance2D) {\r\n          this._revertCameraProperties();\r\n        }\r\n        this.scene.morphTo2D(duration);\r\n\r\n        break;\r\n      }\r\n      case SceneMode.PERFORMANCE_SCENE2D: {\r\n        this.isSceneModePerformance2D = true;\r\n        this.lastLook = this.screenSpaceCameraController.enableLook;\r\n        this.lastTilt = this.screenSpaceCameraController.enableTilt;\r\n        this.lastRotate = this.screenSpaceCameraController.enableRotate;\r\n        this.screenSpaceCameraController.enableTilt = false;\r\n        this.screenSpaceCameraController.enableRotate = false;\r\n        this.screenSpaceCameraController.enableLook = false;\r\n        if (this.morphListenerCancelFn) {\r\n          this.morphListenerCancelFn();\r\n        }\r\n        this.scene.morphToColumbusView(duration);\r\n        const morphCompleteEventListener = this.scene.morphComplete.addEventListener(\r\n          () => {\r\n            this.camera.setView({\r\n              destination: Cesium.Cartesian3.fromDegrees(\r\n                0.0,\r\n                0.0,\r\n                Math.min(\r\n                  CameraService.PERFORMANCE_2D_ALTITUDE,\r\n                  this.getMaximumZoom()\r\n                )\r\n              ),\r\n              orientation: {\r\n                pitch: Cesium.Math.toRadians(-90)\r\n              }\r\n            });\r\n            morphCompleteEventListener();\r\n            this._listenToSceneModeMorph(\r\n              this._revertCameraProperties.bind(this)\r\n            );\r\n          }\r\n        );\r\n\r\n        break;\r\n      }\r\n    }\r\n  }\r\n\r\n  /**\r\n   * Flies the camera to a destination\r\n   * API: https://cesiumjs.org/Cesium/Build/Documentation/Camera.html?classFilter=cam#flyTo\r\n   */\r\n  cameraFlyTo(options: any) {\r\n    return this.camera.flyTo(options);\r\n  }\r\n\r\n  /**\r\n   * Flies the camera to a target\r\n   * API: https://cesiumjs.org/Cesium/Build/Documentation/Viewer.html?classFilter=viewer#flyTo\r\n   * @returns Promise<boolean>\r\n   */\r\n  flyTo(target: any, options?: any) {\r\n    return this.viewer.flyTo(target, options);\r\n  }\r\n\r\n  /**\r\n   * Zooms amount along the camera's view vector.\r\n   * API: https://cesiumjs.org/Cesium/Build/Documentation/Camera.html#zoomIn\r\n   */\r\n  zoomIn(amount: number) {\r\n    return this.camera.zoomIn(amount || this.camera.defaultZoomAmount);\r\n  }\r\n\r\n  /**\r\n   * Zooms amount along the opposite direction of the camera's view vector.\r\n   * API: https://cesiumjs.org/Cesium/Build/Documentation/Camera.html#zoomOut\r\n   */\r\n  zoomOut(amount: number) {\r\n    return this.camera.zoomOut(amount || this.camera.defaultZoomAmount);\r\n  }\r\n\r\n  /**\r\n   * Zoom the camera to a target\r\n   * API: https://cesiumjs.org/Cesium/Build/Documentation/Viewer.html?classFilter=viewer#zoomTo\r\n   * @returns Promise<boolean>\r\n   */\r\n  zoomTo(target: any, offset?: any) {\r\n    return this.viewer.zoomTo(target, offset);\r\n  }\r\n\r\n  /**\r\n   * Flies the camera to a destination\r\n   * API: https://cesiumjs.org/Cesium/Build/Documentation/Camera.html?classFilter=camera#setView\r\n   * @param options viewer options\r\n   */\r\n  setView(options: any) {\r\n    this.camera.setView(options);\r\n  }\r\n\r\n  /**\r\n   * Set camera's rotation\r\n   */\r\n  setRotation(degreesInRadians: number) {\r\n    this.setView({orientation: {heading: degreesInRadians}});\r\n  }\r\n\r\n  /**\r\n   * Locks or unlocks camera rotation\r\n   */\r\n  lockRotation(lock: boolean) {\r\n    this.scene.screenSpaceCameraController.enableRotate = !lock;\r\n  }\r\n\r\n  /**\r\n   * Make the camera track a specific entity\r\n   * API: https://cesiumjs.org/Cesium/Build/Documentation/Viewer.html?classFilter=viewer#trackedEntity\r\n   * @param cesiumEntity - cesium entity( billboard, polygon...) to track\r\n   * @param options - track entity options\r\n   */\r\n  trackEntity(\r\n    cesiumEntity?: any,\r\n    options?: { flyTo: boolean; flyToDuration?: number; altitude?: number }\r\n  ) {\r\n    const flyTo = (options && options.flyTo) || false;\r\n\r\n    this.viewer.trackedEntity = undefined;\r\n    return new Promise<void>(resolve => {\r\n      if (flyTo) {\r\n        const flyToDuration = (options && options.flyToDuration) || 1;\r\n        const altitude = (options && options.altitude) || 10000;\r\n\r\n        // Calc entity flyTo position and wanted altitude\r\n        const entPosCar3 = cesiumEntity.position.getValue(Cesium.JulianDate.now());\r\n        const entPosCart = Cesium.Cartographic.fromCartesian(entPosCar3);\r\n        const zoomAmount = altitude - entPosCart.height;\r\n        entPosCart.height = altitude;\r\n        const flyToPosition = Cesium.Cartesian3.fromRadians(\r\n          entPosCart.longitude,\r\n          entPosCart.latitude,\r\n          entPosCart.height\r\n        );\r\n\r\n        this.cameraFlyTo({\r\n          duration: flyToDuration,\r\n          destination: flyToPosition,\r\n          complete: () => {\r\n            this.viewer.trackedEntity = cesiumEntity;\r\n            setTimeout(() => {\r\n              if (zoomAmount > 0) {\r\n                this.camera.zoomOut(zoomAmount);\r\n              } else {\r\n                this.camera.zoomIn(zoomAmount);\r\n              }\r\n            }, 0);\r\n            resolve();\r\n          }\r\n        });\r\n      } else {\r\n        this.viewer.trackedEntity = cesiumEntity;\r\n        resolve();\r\n      }\r\n    });\r\n  }\r\n\r\n  untrackEntity() {\r\n    this.trackEntity();\r\n  }\r\n}\r\n"]}