用cesium本身添加水纹效果

Posted 2020-12-05 yanan-boke

参考网站：https://blog.csdn.net/XLSMN/article/details/78752669

1、首先来看一下整体效果

2、具体方法如下：

首先，你必须有两张很重要的图片，你可以从我这里保存为本地

3.具体代码如下

 

1.  
   var scene=viewer.scene;
2.  
   function applyWaterMaterial(primitive, scene) {
3.  
   primitive.appearance.material = new Cesium.Material({
4.  
   fabric : {
5.  
   type : ‘Water‘,
6.  
   uniforms : {
7.  
   specularMap:‘images/earthspec1k.jpg‘,
8.  
   normalMap:‘images/waterNormals.jpg‘,
9.  
   frequency: 10000.0,
10.  
    animationSpeed: 0.01,
11.  
    amplitude: 1.0
12.  
    }
13.  
    }
14.  
    });
15.  
    }
16.  
     
17.  
    var worldRectangle = viewer.scene.primitives.add(new Cesium.Primitive({
18.  
    geometryInstances : new Cesium.GeometryInstance({
19.  
    geometry : new Cesium.RectangleGeometry({
20.  
    rectangle : Cesium.Rectangle.fromDegrees(-180, -90, 180.0, 90.0),
21.  
    vertexFormat : Cesium.EllipsoidSurfaceAppearance.VERTEX_FORMAT
22.  
    })
23.  
    }),
24.  
    appearance : new Cesium.EllipsoidSurfaceAppearance({
25.  
    aboveGround : true
26.  
    }),
27.  
    show : true
28.  
    }));
29.  
     
30.  
    applyWaterMaterial(worldRectangle, scene);

以上是全球动态水的加载，当然可以针对某片区域水域进行动态水的加载（只需要将上边的矩形换成你要加载动态水区域的边界一系列坐标值）

 

1.  
   function applydjk_WaterMaterial(primitive, scene) {
2.  
   primitive.appearance.material = new Cesium.Material({
3.  
   fabric : {
4.  
   type : ‘Water‘,
5.  
   uniforms : {
6.  
   normalMap:‘images/waterNormals.jpg‘,
7.  
   frequency: 10000.0,
8.  
   animationSpeed: 0.01,
9.  
   amplitude: 50
10.  
    }
11.  
    }
12.  
    });
13.  
    }
14.  
     
15.  
    var djk_Polygon = viewer.scene.primitives.add(new Cesium.Primitive({
16.  
    geometryInstances : new Cesium.GeometryInstance({
17.  
    geometry : new Cesium.PolygonGeometry({
18.  
    polygonHierarchy : new Cesium.PolygonHierarchy(
19.  
    Cesium.Cartesian3.fromDegreesArray([
20.  
    111.48894522023063,32.55843610413914,111.48869238776277,32.55602570974643,111.49004745721604,32.5548361448687,111.49250635559537,32.5526581917131,111.49401017612676,32.55129837476868,111.49557557543416,32.549965127681524,111.49805874806115,32.550219820173126,111.49881935514881,32.550823388219456,111.49893286824275,32.55195597852755,111.4983164393889,32.5535655841798,111.49817521853979,32.554570336381104,111.49914284747027,32.55554277243855,111.49967950821859,32.555814392110264,111.50062151969038,32.556517275179836,111.50149914222958,32.55731250438687,111.50207800636986,32.55757396515373,111.50386396090245,32.55781206769338,111.50391371888884,32.559650818164926,111.50077307397399,32.56013340913413,111.49625702141412,32.560250133340446,111.49171532588734,32.560183453792156,111.48920373670329,32.56015020231049,111.48844043918616,32.55981856869106,111.48743657311691,32.55945303779285,111.48760383414758,32.55863069835514,111.48812831262538,32.55837951411848
21.  
    ])
22.  
    ),
23.  
    vertexFormat : Cesium.EllipsoidSurfaceAppearance.VERTEX_FORMAT
24.  
    })
25.  
    }),
26.  
    appearance : new Cesium.EllipsoidSurfaceAppearance({
27.  
    aboveGround : true
28.  
    }),
29.  
    show : true
30.  
    }));
31.  
    applydjk_WaterMaterial(djk_Polygon, scene);

当然，有时获取一系列区域的坐标值数量较多，手动去采集比较麻烦，耗时耗力，推荐一种方法，到Goole earth中画面，然后生成kml文件，里边就包含了你所画区域的边界坐标。（具体做法，可问度娘）