/**
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* @Author : Caven Chen
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*/
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import { Cesium } from '../../../libs'
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import State from '../../state/State'
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import { Util } from '../../utils'
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import IMG from '../../images/cloud.jpg'
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class Cloud {
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constructor(viewer) {
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this._id = Util.uuid()
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this._viewer = viewer
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this._delegate = undefined
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this._rotateAmount = 0
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this._enable = false
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this._heading = 0
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this._state = State.INITIALIZED
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}
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get type() {
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return 'cloud'
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}
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set enable(enable) {
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if (!this._viewer.scene.mode === Cesium.SceneMode.SCENE3D) {
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return
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}
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if (!this._delegate) {
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this._createPrimitive()
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}
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this._enable = this._delegate.show = enable
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if (this._enable) {
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this._viewer.scene.postUpdate.addEventListener(this._onRotate, this)
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} else {
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this._viewer.scene.postUpdate.removeEventListener(this._onRotate, this)
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}
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}
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get enable() {
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return this._enable
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}
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set rotateAmount(rotateAmount) {
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this._rotateAmount = rotateAmount
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}
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get rotateAmount() {
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return this._rotateAmount
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}
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/**
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*
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* @param scene
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* @param time
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* @private
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*/
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_onRotate(scene, time) {
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if (this._rotateAmount === 0) {
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return
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}
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this._heading += this._rotateAmount
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if (this._heading >= 360 || this._heading <= -360) {
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this._heading = 0
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}
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this._delegate.modelMatrix = Cesium.Transforms.headingPitchRollToFixedFrame(
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new Cesium.Cartesian3(),
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new Cesium.HeadingPitchRoll(Cesium.Math.toRadians(this._heading), 0, 0)
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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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*/
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_createPrimitive() {
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this._delegate = new Cesium.Primitive({
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appearance: new Cesium.EllipsoidSurfaceAppearance({
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material: new Cesium.Material({
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fabric: {
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type: 'Image',
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uniforms: {
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color: new Cesium.Color(1.0, 1.0, 1.0, 1.0),
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image: IMG,
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},
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components: {
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alpha:
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'texture(image, fract(repeat * materialInput.st)).r * color.a',
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diffuse: 'vec3(1.0)',
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},
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},
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}),
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translucent: true,
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aboveGround: true,
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}),
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})
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this._delegate.geometryInstances = new Cesium.GeometryInstance({
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geometry: new Cesium.EllipsoidGeometry({
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vertexFormat: Cesium.VertexFormat.POSITION_AND_ST,
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radii: this._viewer.scene.globe.ellipsoid.radii,
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}),
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id: this._id,
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})
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this._delegate.show = this._enable
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this._viewer.scene.primitives.add(this._delegate)
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}
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}
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export default Cloud
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