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Changed distance calculation to use latitude and longitude

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Tags: #fix
This commit is contained in:
Michael Rausch
2017-03-17 11:08:35 +13:00
parent 8829728f19
commit d6fe155d4d
3 changed files with 14 additions and 4 deletions
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src/main/java/seng302/models/Event.java
+12 -2
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@@ -114,7 +114,7 @@ public class Event {
if (this.isFinishingEvent) {
return (this.getTimeString() + ", " + this.getBoat().getTeamName() + " finished the race");
}
System.out.println(this.getDistanceBetweenMarks());
return (this.getTimeString() + ", " + this.getBoat().getTeamName() + " passed " + this.mark1.getName() + " going heading " + this.getBoatHeading() + "°");
}
@@ -122,7 +122,17 @@ public class Event {
* @return the distance between the two marks
*/
public double getDistanceBetweenMarks(){
return Math.sqrt(Math.pow(mark1.getLatitude()-mark2.getLatitude(), 2) + Math.pow(mark1.getLongitude()-mark2.getLongitude(), 2));
//return Math.sqrt(Math.pow(mark1.getLatitude()-mark2.getLatitude(), 2) + Math.pow(mark1.getLongitude()-mark2.getLongitude(), 2));
double earth_radius = 6378.137;
double dLat = this.mark2.getLatitude() * Math.PI / 180 - this.mark1.getLatitude() * Math.PI / 180;
double dLon = this.mark2.getLongitude() * Math.PI / 180 - this.mark1.getLongitude() * Math.PI / 180;
double a = Math.sin(dLat / 2) * Math.sin(dLat / 2) + Math.cos(this.mark1.getLatitude() * Math.PI / 180) * Math.sin(dLon/2) * Math.sin(dLon/2);
double c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a));
double d = earth_radius * c;
return d * 1000;
}
/**