Cesium使用primitive合并几何体时,能不能既定义材质又能定义每个几何体不同的颜色
这块刚着手尝试了解的不是很多,绘制的是polyline,或者可能要达到我想要的效果我这里PolylineGeometry的用法不对?
var instances = [];
for (var lon = -180.0; lon < 180.0; lon += 5.0) {
for (var lat = -90.0; lat < 90.0; lat += 5.0) {
var instance = new Cesium.GeometryInstance({
geometry: new Cesium.PolylineGeometry({
positions: Cesium.Cartesian3.fromDegreesArray([lon, lat, lon + 5.0, lat + 5.0]),
width: 6.0,
}),
attributes: {
color: Cesium.ColorGeometryInstanceAttribute.fromColor(Cesium.Color.fromRandom({
alpha: 0.5
}))
},
});
instances.push(instance);
}
}
viewer.scene.primitives.add(new Cesium.Primitive({
geometryInstances: instances,
appearance: new Cesium.PolylineMaterialAppearance({
material: Cesium.Material.fromType(Cesium.Material.PolylineArrowType,{color: Cesium.Color.BLUE})})
}));