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Action packets now sent at regular 20ms intervals

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#issue[38] #implement
This commit is contained in:
Calum
2017-08-06 22:17:08 +12:00
parent 43788bd153
commit 8a40119a98
16 changed files with 286 additions and 189 deletions
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src/main/java/seng302/visualiser/map/MercatorProjection.java
-55
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package seng302.visualiser.map;
import javafx.geometry.Point2D;
import seng302.model.GeoPoint;
/**
* An utility class useful to convert between Geo locations and Mercator projection
* planar coordinates.
* Created by Haoming on 15/5/2017
*/
public class MercatorProjection {
private static final double MERCATOR_RANGE = 256;
private static final double pixelsPerLngDegree = MERCATOR_RANGE / 360.0;
private static final double pixelsPerLngRadian = MERCATOR_RANGE / (2 * Math.PI);
/**
* A help function keeps the value in bound between -0.9999 and 0.9999.
* @param value in bound value
* @return the value in bound
*/
private static double bound(double value) {
return Math.min(Math.max(value, -0.9999), 0.9999);
}
/**
* Projects a Geo Location (lat, lng) on a planar
* @param geo GeoPoint (lat, lng) location to be projected
* @return the projection Point2D (x, y) on planar
*/
static Point2D toMapPoint(GeoPoint geo) {
double x, y;
Point2D origin = new Point2D(MERCATOR_RANGE / 2.0, MERCATOR_RANGE / 2.0);
x = (origin.getX() + geo.getLng() * pixelsPerLngDegree);
// NOTE(appleton): Truncating to 0.9999 effectively limits latitude to
// 89.189. This is about a third of a tile past the edge of the world tile.
double sinY = bound(Math.sin(Math.toRadians(geo.getLat())));
y = origin.getY() + 0.5 * Math.log((1 + sinY) / (1 - sinY)) * (-pixelsPerLngRadian);
return new Point2D(x, y);
}
/**
* Converts the planar projection (x, y) back to Geo Location (lat, lng)
* @param point Point2D (x, y) to be converted back
* @return the original Geo location converted from the given projection point
*/
public static GeoPoint toMapGeo(Point2D point) {
Point2D origin = new Point2D(MERCATOR_RANGE / 2.0, MERCATOR_RANGE / 2.0);
double lng = (point.getX() - origin.getX()) / pixelsPerLngDegree;
double latRadians = (point.getY() - origin.getY()) / (-pixelsPerLngRadian);
double lat = Math.toDegrees(2 * Math.atan(Math.exp(latRadians)) - Math.PI / 2.0);
return new GeoPoint(lat, lng);
}
}