got turf area and intersection and union working

api/package.json

@@ -13,6 +13,7 @@
     "mysql": "^2.16.0",
     "request": "^2.88.0",
     "restify": "^7.2.1",
-    "restify-simple-versioning": "^1.0.0"
+    "restify-simple-versioning": "^1.0.0",
+    "turf": "^3.0.14"
   }
 }

api/v1/api.js

@@ -4,6 +4,7 @@ let util = require("util");
 
 module.exports = {
     getPolygons : function (req, res) {
+        mathFunc.calculateArea([]);
         if (req.query.gameID != null) {
             let query = "CALL getPolygonPoints(\"" + req.query.gameID + "\");";
             db.get().query(query, function(err, rows){
@@ -47,7 +48,7 @@ module.exports = {
                 let lastPoint = points[points.length - 1];
                 let distance = mathFunc.gpsToMeters(firstPoint.lat, firstPoint.lng, lastPoint.lat, lastPoint.lng);
                 console.log(distance);
-                if (distance < 3) {
+                if (distance < 10) {
                     //area is just 1 for now we fix later.
                     query = util.format("CALL insertPolygon(\"%s\", \"%s\", 1)", gameID, userID);
                     db.get().query(query, function(err, rows) {

api/v1/mathFunc.js

@@ -1,3 +1,6 @@
+// import Turf from "turf";
+let turf = require("turf");
+
 module.exports = {
     gpsToMeters: function (lat1, lon1, lat2, lon2){  // generally used geo measurement function
         var R = 6378.137; // Radius of earth in KM
@@ -9,5 +12,48 @@ module.exports = {
         var c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a));
         var d = R * c;
         return d * 1000; // meters
+    },
+    calculateArea: function (points) {
+        var polygon = turf.polygon([[[125, -15], [113, -22], [154, -27], [144, -15], [125, -15]]]);
+        var area = turf.area(polygon);
+        console.log(area);
+        var poly1 = turf.polygon([[
+            [-82.574787, 35.594087],
+            [-82.574787, 35.615581],
+            [-82.545261, 35.615581],
+            [-82.545261, 35.594087],
+            [-82.574787, 35.594087]
+        ]], {"fill": "#0f0"});
+        var poly2 = turf.polygon([[
+            [-82.560024, 35.585153],
+            [-82.560024, 35.602602],
+            [-82.52964, 35.602602],
+            [-82.52964, 35.585153],
+            [-82.560024, 35.585153]
+        ]], {"fill": "#00f"});
+        
+        var union = turf.union(poly1, poly2);
+        console.log(union.geometry.coordinates);
+        var poly1 = turf.polygon([[
+            [-122.801742, 45.48565],
+            [-122.801742, 45.60491],
+            [-122.584762, 45.60491],
+            [-122.584762, 45.48565],
+            [-122.801742, 45.48565]
+          ]]);
+          
+          var poly2 = turf.polygon([[
+            [-122.520217, 45.535693],
+            [-122.64038, 45.553967],
+            [-122.720031, 45.526554],
+            [-122.669906, 45.507309],
+            [-122.723464, 45.446643],
+            [-122.532577, 45.408574],
+            [-122.487258, 45.477466],
+            [-122.520217, 45.535693]
+          ]]);
+          
+          var intersection = turf.intersect(poly1, poly2);
+          console.log(intersection);//null if no intersect
     }
 }