_Hugs Maths Teacher_

src/Berserk.java

@@ -0,0 +1,58 @@
+import java.util.HashMap;
+
+public class Berserk {
+
+    static int tileSize = 256;
+    static double initialResolution = 2d * Math.PI * 6378137d / (double) tileSize;
+    // 156543.03392804062 for tileSize 256 PIxels
+    static double originShift = 2d * Math.PI * 6378137d / 2d;
+
+    /**
+     * Converts given lat/lon in WGS84 Datum to XY in Spherical Mercator EPSG:900913
+     *
+     * @param lat The latitude
+     * @param lon The longitude
+     * @return A hashmap containing the x meter and y meter.
+     */
+    public static HashMap<String, Double> latLonToMeters(double lat, double lon) {
+        HashMap<String, Double> returnVals = new HashMap<String, Double>();
+
+        double mx = lon * originShift / 180.0;
+        double my = Math.log(Math.tan((90 + lat) * Math.PI / 360.0)) / (Math.PI / 180.0);
+
+        my = my * originShift / 180.0;
+        returnVals.put("mx", mx);
+        returnVals.put("my", my);
+        return returnVals;
+    }
+
+    /**
+     * Converts EPSG:900913 to pyramid pixel coordinates in given zoom level
+     *
+     * @param mx         The meter x
+     * @param my         The meter y
+     * @param resolution The resolution
+     * @return A hashmap containg the x pixel and y pixel.
+     */
+    public static HashMap<String, Double> metersToPixels(double mx, double my, double resolution) {
+        HashMap<String, Double> returnVals = new HashMap<String, Double>();
+
+        double px = (mx + originShift) / resolution;
+        double py = (my + originShift) / resolution;
+
+        returnVals.put("px", px);
+        returnVals.put("py", py);
+        return returnVals;
+    }
+
+    public static void main(String[] args) {
+        double mx = -8237494.4864285; //-73.998672
+        double my = 4970354.7325767; // 40.714728
+        double resolution = 12;
+        HashMap<String, Double> meterValues = metersToPixels(mx, my, resolution);
+        HashMap<String, Double> pixelValues = latLonToMeters(meterValues.get("px"), meterValues.get("py"));
+        System.out.println("First val: " + pixelValues.get("my"));
+        System.out.println("Second val: " + pixelValues.get("mx"));
+    }
+
+}

src/WatcherThread.java

@@ -35,6 +35,7 @@ public void run() {
                 Document document = Jsoup.connect("http://www.haze.gov.sg/haze-updates/psi-readings-over-the-last-24-hours").get();
                 Element firstHalfOfDay = document.select(".noalter").get(1).children().select("tr").get(1);
                 Element secondHalfOfDay = document.select(".noalter").get(1).children().select("tr").get(3);
+//                System.out.println(secondHalfOfDay.html());
                 firstHalfOfDay.select("*").get(0).remove();
                 secondHalfOfDay.select("*").get(0).remove();
                 int hour = GregorianCalendar.getInstance().get(Calendar.HOUR_OF_DAY);
@@ -84,6 +85,8 @@ public void run() {
     14 00 -> 12;
      */
 
+//    private static int[] times = new int[]{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 13, 12, 11, 10, 9, 8, 7, 6};
+
     private static String getPSI(Element firstHalfOfDay, Element secondHalfOfDay, int hour, String currentPSI, int offset) {
         if (hour == 12) {
             // Noon
@@ -92,10 +95,10 @@ private static String getPSI(Element firstHalfOfDay, Element secondHalfOfDay, in
             // Morning
             currentPSI = firstHalfOfDay.select("*").get(hour + offset).text();
         } else if (hour >= 13 && hour <= 23) {
-            // Afternoon - night            System.out.println(secondHalfOfDay.select("*").get(hour - (hour - 13) + offset).text());
-            System.out.println(secondHalfOfDay.select("*").get(hour - Integer.parseInt(String.valueOf(hour).substring(1)) + offset).text());
-
-            currentPSI = secondHalfOfDay.select("*").get(hour - (hour - 7) + offset).text();
+            // Afternoon - night
+            System.out.println(hour - 12);
+            currentPSI = secondHalfOfDay.select("*").get(hour - 10).text();
+            System.out.println(currentPSI);
         }
         return currentPSI;
     }