From d3a6b8203152fbb7219f3741529097d6b19aabdb Mon Sep 17 00:00:00 2001
From: Fan-Wu Yang <fwy13@uclive.ac.nz>
Date: Fri, 22 Sep 2017 21:39:48 +1200
Subject: [PATCH] Commit before checking out developement

---
 .../visualiser/Controllers/RaceViewController.java  | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/racevisionGame/src/main/java/visualiser/Controllers/RaceViewController.java b/racevisionGame/src/main/java/visualiser/Controllers/RaceViewController.java
index 24145130..2e3aedf4 100644
--- a/racevisionGame/src/main/java/visualiser/Controllers/RaceViewController.java
+++ b/racevisionGame/src/main/java/visualiser/Controllers/RaceViewController.java
@@ -323,8 +323,19 @@ public class RaceViewController extends Controller {
             AnimationTimer sailsFollowBoat = new AnimationTimer() {
                 @Override
                 public void handle(long now) {
+                    double windDir = visualiserRace.getVisualiserRaceState().getWindDirection().degrees();
+                    double windOffset = (360 - windDir + boat.getBearing().degrees()) % 360;
+                    double sailDir =  windOffset / 180 * 270 + windDir + 180;
+                    boolean leftOfWind = windOffset >= 180;
+                    if (leftOfWind){
+                        System.out.println("is left");
+                        sailDir = -sailDir;
+                    } else {
+                        System.out.println("is right");
+                        sailDir = windDir - sailDir;
+                    }
                     if (boat.isSailsOut()) {
-                        sailsSubject.setHeading(visualiserRace.getVisualiserRaceState().getWindDirection().degrees() + 90);
+                        sailsSubject.setHeading(sailDir);
                         if (sails3D.isLuffing()) {
                             sails3D.stopLuffing();
                         }