/*
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* @Descripttion:
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* @version: 1.0.0
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* @Author: glc
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* @Date: 2022-04-29 16:13:29
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* @LastEditors: Andy
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* @LastEditTime: 2022-09-16 20:55:05
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*/
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//自定义水体primitive
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export function WaterPrimitive(options) {
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//debugger;
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this._positions = options.positions;
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this._height = options.height;
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this._extrudedHeight = options.extrudedHeight;
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this._primitive = null;
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this._waterImg = options.waterimg;
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Object.defineProperty(this, "extrudedHeight", {
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get() {
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return this._extrudedHeight;
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},
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set(newVal) {
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if (Object.prototype.toString.call(newVal) !== "[object Number]") return;
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if (this._primitive) {
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this._primitive._state = 3; // 关键
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this._primitive._appearance = undefined; // 关键
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this._primitive.geometryInstances.geometry = this.getGeometry();
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this._extrudedHeight = newVal;
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}
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},
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});
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this.init(); // 调用init函数
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}
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WaterPrimitive.prototype.getGeometry = function () {
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return new Cesium.PolygonGeometry({
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polygonHierarchy: new Cesium.PolygonHierarchy(this._positions),
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height: this._height, // 底部高度
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extrudedHeight: this._extrudedHeight, // 水面高度
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vertexFormat: Cesium.EllipsoidSurfaceAppearance.VERTEX_FORMAT,
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});
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};
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WaterPrimitive.prototype.init = function () {
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this._primitive = new Cesium.Primitive({
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show: true, // 默认隐藏
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geometryInstances: new Cesium.GeometryInstance({
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geometry: new Cesium.PolygonGeometry({
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polygonHierarchy: new Cesium.PolygonHierarchy(this._positions),
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extrudedHeight: this._extrudedHeight, //注释掉此属性可以只显示水面
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//perPositionHeight: true, //注释掉此属性水面就贴地了
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}),
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}),
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// 可以设置内置的水面shader
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appearance: new Cesium.EllipsoidSurfaceAppearance({
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translucent: true,
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material: new Cesium.Material({
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fabric: {
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type: "Water",
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uniforms: {
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baseWaterColor: new Cesium.Color(0.0, 0.0, 1.0, 0.5),
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blendColor: new Cesium.Color(0.0, 0.0, 1.0, 0.5),
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normalMap: this._waterImg,
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frequency: 1000.0,
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animationSpeed: 0.01,
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amplitude: 10.0,
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},
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},
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}),
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}),
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});
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};
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WaterPrimitive.prototype.update = function (frameState) {
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if (this._primitive) {
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let primitive = this._primitive;
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primitive.update(frameState);
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}
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};
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