added spiral funtion in helper class

Author: chetan

lib/ClusteredMapView.js

@@ -7,7 +7,8 @@ import {
   isMarker,
   markerToGeoJSONFeature,
   calculateBBox,
-  returnMapZoom
+  returnMapZoom,
+  generateSpiral
 } from "./helpers";
 
 const ClusteredMapView = ({
@@ -86,6 +87,7 @@ const ClusteredMapView = ({
       let positions = generateSpiral(
         markers[0].properties.point_count,
         markers[0].geometry.coordinates,
+        clusterChildren,
       );
       updateSpiderMarker(positions);
       updateSpiderfierMarker({
@@ -97,29 +99,6 @@ const ClusteredMapView = ({
     }
   }, [isSpiderfier]);
 
-  /**
-   * To generate coordinates in spiral way
-   * @param count Number of coordinates you want 
-   * @param centerLocation center location 
-   */
-  const generateSpiral = (count, centerLocation) => {
-    let res = [];
-    res.length = count;
-    let angle = 0;
-    for (let i = 0; i < count; i++) {
-      angle = 0.1 * (i * 0.5);
-      let latitude = centerLocation[1] + 0.00025 * angle * Math.cos(angle);
-      let longitude = centerLocation[0] + 0.00025 * angle * Math.sin(angle);
-      res[i] = {
-        longitude,
-        latitude,
-        image: clusterChildren[i].properties.image,
-        onPress: clusterChildren[i].properties.onPress,
-      };
-    }
-    return res;
-  };
-
   const _onRegionChangeComplete = region => {
     if (superCluster) {
       const bBox = calculateBBox(region);

lib/helpers.js

@@ -49,6 +49,24 @@ export const markerToGeoJSONFeature = (marker, index) => {
   };
 };
 
+export const generateSpiral = (count, centerLocation, clusterChildren) => {
+  let res = [];
+  res.length = count;
+  let angle = 0;
+  for (let i = 0; i < count; i++) {
+    angle = 0.1 * (i * 0.5);
+    let latitude = centerLocation[1] + 0.00025 * angle * Math.cos(angle);
+    let longitude = centerLocation[0] + 0.00025 * angle * Math.sin(angle);
+    res[i] = {
+      longitude,
+      latitude,
+      image: clusterChildren[i].properties.image,
+      onPress: clusterChildren[i].properties.onPress,
+    };
+  }
+  return res;
+};
+
 export const returnMarkerStyle = points => {
   if (points >= 50) {
     return {