/**
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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 FogShader from '../../material/shader/weather/FogShader.glsl'
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class Fog {
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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._enable = false
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this._fogByDistance = { near: 10, nearValue: 0, far: 2000, farValue: 1.0 }
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this._color = new Cesium.Color(0, 0, 0, 1)
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this._state = State.INITIALIZED
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}
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get type() {
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return 'fog'
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}
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set enable(enable) {
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this._enable = enable
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if (enable && this._viewer && !this._delegate) {
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this._createPostProcessStage()
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}
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this._delegate && (this._delegate.enabled = enable)
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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 fogByDistance(fogByDistance) {
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this._fogByDistance = fogByDistance
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this._delegate &&
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(this._delegate.uniforms.fogByDistance = new Cesium.Cartesian4(
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this._fogByDistance?.near || 10,
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this._fogByDistance?.nearValue || 0.0,
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this._fogByDistance?.far || 2000,
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this._fogByDistance?.farValue || 1.0
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))
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}
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get fogByDistance() {
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return this._fogByDistance
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}
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set color(color) {
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this._color = color
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this._delegate && (this._delegate.uniforms.fogColor = color)
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}
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get color() {
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return this._color
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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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_createPostProcessStage() {
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this._delegate = new Cesium.PostProcessStage({
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name: this._id,
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fragmentShader: FogShader,
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uniforms: {
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fogByDistance: new Cesium.Cartesian4(
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this._fogByDistance?.near || 10,
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this._fogByDistance?.nearValue || 0.0,
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this._fogByDistance?.far || 200,
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this._fogByDistance?.farValue || 1.0
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),
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fogColor: this._color,
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},
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})
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this._viewer.scene.postProcessStages.add(this._delegate)
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}
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}
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export default Fog
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