cesium之添加Primitive大量长方体
场景:
变成中发现页面用peimitive加载上万个长方体柱子会出现页面很卡的问题。
原因:
每创建一个长方体用viewer.scene.primitives.add(new Cesium.Primitive())加载一次。
解决方法:
将所有的柱子创建口,放在同一个geometryInstances中取加载。
代码:
// 创建长方体对象 const extrudedPolygon = new Cesium.PolygonGeometry({ polygonHierarchy: new Cesium.PolygonHierarchy( Cesium.Cartesian3.fromDegreesArray([ 112.41726298378288,23.290411251106182,113.67072522399741,23.560312361463682, 114.09370956893551,22.590768298743153,112.83803246418894,22.285610818885644, ]) ), extrudedHeight: 100000, }) const instance = new Cesium.GeometryInstance({ geometry: extrudedPolygon, id: 'box with height', }) const extrudedPolygon2 = new Cesium.PolygonGeometry({ polygonHierarchy: new Cesium.PolygonHierarchy( Cesium.Cartesian3.fromDegreesArray([ 114, 22,115,22, 115,23,114,23, ]) ), extrudedHeight: 100000, }) const instance2 = new Cesium.GeometryInstance({ geometry: extrudedPolygon2, id: 'box with height', }) // 创建材质,在MaterialAppearance中若不添加基础材质,模型将会透明 var material = new Cesium.Material.fromType("Color"); material.uniforms.color = Cesium.Color.WHITE; // 自定义材质 const aper = new Cesium.MaterialAppearance({ material: material, translucent: true, closed: true, }) // 加载模型 var p = viewer.scene.primitives.add( new Cesium.Primitive({ geometryInstances: [instance, instance2], appearance: aper, releaseGeometryInstances: false, compressVertices: false, }) )
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