Basic implementation for mapping windspeed to draw a polar on a gate complete

Created functionality to grab the closest windspeed value to map to VMG values based off the current wind speed in the Polar Table

Created new RaceXML mark object which contains ALL marks for purposes of sequencing

Displaying correct (?) polars for one point only on a gate

Created functionality to receive leg data for each boat and then map that to the next gate. This may only work for the current race due to a slight fudge factor

Created functionality to receive wind speed

tags: #story[956] #pair[wmu16, mra106]

src/main/java/seng302/models/PolarTable.java

@@ -1,6 +1,7 @@
 package seng302.models;
 
 import java.io.*;
+import java.util.ArrayList;
 import java.util.HashMap;
 
 /**
@@ -113,4 +114,50 @@ public final class PolarTable {
         return downwindOptimal;
     }
 
+
+    /**
+     * Will raise an exception if a polar table has just one row of data
+     * @param thisWindSpeed The current wind speed
+     * @return HashMap containing just the optimal upwind angle and resulting boat speed
+     */
+    public static HashMap<Double, Double> getOptimalUpwindVMG(Double thisWindSpeed) {
+
+        Double polarWindSpeed = getClosestMatch(thisWindSpeed);
+        return upwindOptimal.get(polarWindSpeed);
+    }
+
+
+    /**
+     * Will raise an exception if a polar table has just one row of data
+     * @param thisWindSpeed The current wind speed
+     * @return HashMap containing just the optimal downwind angle and resulting boat speed
+     */
+    public static HashMap<Double, Double> getOptimalDownwindVMG(Double thisWindSpeed) {
+
+        Double polarWindSpeed = getClosestMatch(thisWindSpeed);
+        return downwindOptimal.get(polarWindSpeed);
+    }
+
+
+    private static Double getClosestMatch(Double thisWindSpeed) {
+
+        ArrayList<Double> windValues = new ArrayList<>(polarTable.keySet());
+
+        Double lowerVal = windValues.get(0);
+        Double upperVal = windValues.get(1);
+
+        for(int i = 0; i < windValues.size() - 1; i++) {
+            lowerVal = windValues.get(i);
+            upperVal = windValues.get(i+1);
+            if (thisWindSpeed <= upperVal) {
+                break;
+            }
+        }
+
+        Double lowerDiff = Math.abs(lowerVal - thisWindSpeed);
+        Double upperDiff = Math.abs(upperVal - thisWindSpeed);
+
+        return (lowerDiff <= upperDiff) ? lowerVal : upperVal;
+    }
+
 }