docs: 补充点图层 blur 的配置文档/demo

docs/api/point_layer/scatter.zh.md

@@ -37,7 +37,7 @@ color 可以根据数据的差异设置成不同颜色，表示数据的不同
 
 ### size
 
-散点图一般等大小的图形,size 一般设置成常量
+散点图一般等大小的图形，size 一般设置成常量。
 
 ```javascript
 const scatter = new PointLayer()
@@ -51,6 +51,12 @@ const scatter = new PointLayer()
   });
 ```
 
-[在线案例](../../../examples/point/scatter#scatter)
+
+[在线案例](/zh/examples/point/scatter#scatter)
+
+### blur
+散点图的 style 样式支持配置 blur，调整模糊。
+
+[在线案例](/zh/examples/point/scatter#blur)
 
 `markdown:docs/common/layer/base.md`

examples/point/scatter/demo/blur.js

@@ -0,0 +1,36 @@
+import { Scene, PointLayer } from '@antv/l7';
+import { GaodeMap } from '@antv/l7-maps';
+
+const scene = new Scene({
+  id: 'map',
+  map: new GaodeMap({
+    center: [ 112, 30.267069 ],
+    pitch: 0,
+    style: 'dark',
+    zoom: 3.8
+  })
+});
+scene.on('loaded', () => {
+  fetch('https://gw.alipayobjects.com/os/bmw-prod/450b2d95-006c-4bad-8269-15729269e142.json')
+    .then(res => res.json())
+    .then(data => {
+      const layer = new PointLayer({ blend: 'additive' })
+        .source(data, {
+          parser: {
+            type: 'json',
+            x: 'lng',
+            y: 'lat'
+          }
+        })
+        .shape('circle')
+        .color('#f00')
+        .size('value', v => 15 + 15 * v)
+        .style({
+          blur: 2.5,
+          opacity: 'opacity'
+        })
+        .active(true);
+      scene.addLayer(layer);
+    });
+
+});

examples/point/scatter/demo/meta.json

@@ -19,6 +19,11 @@
       "title": "样式映射散点",
       "screenshot":"https://gw.alipayobjects.com/mdn/rms_23a451/afts/img/A*F_QoSr-W0BwAAAAAAAAAAAAAARQnAQ"
     },
+    {
+      "filename": "blur.js",
+      "title": "模糊点",
+      "screenshot":"https://gw.alipayobjects.com/mdn/rms_816329/afts/img/A*v7v6SacA_5AAAAAAAAAAAAAAARQnAQ"
+    },
     {
       "filename": "animatePoint.js",
       "title": "水波散点",