JavaFX - avoiding a retracing of common hexagon edges in a hexagonal map - javafx

Question

private void addHexagonsToScreen() {
for(Hex hex : map.getMap()) {
Point[] corners = screen.polygonCorners(hex);
int i = 0;
Double[] points = new Double[12];
for(Point point : corners) {
points[i] = point.getX();
points[i+1] = point.getY();
i += 2;
}
this.root.getChildren().add(drawHexagon(points));
}
}
private Polygon drawHexagon(Double[] points) {
Polygon polygon = new Polygon();
polygon.getPoints().addAll(points);
polygon.setStroke(Color.BLACK);
polygon.setFill(Color.TRANSPARENT);
return polygon;
}
This is how I define a point.
public class Point {
private final double x, y;
public Point(double x, double y) {
this.x = x;
this.y = y;
}
/**
* #return the screen x-coordinate.
*/
public double getX() {
return x;
}
/**
* #return the screen y-coordinate.
*/
public double getY() {
return y;
} }
This is currently how I am drawing my hexagons on a Pane object. As you can see in the picture below, I'm fairly certain that most of the lines are actually being retraced because each edge (except the outer edges) are obviously common to two hexagons. In order to solve this, I instead calculated all the points at once then passed that into the Polygon() function as a double [] with the intention of drawing just one polygon rather than many.
private void addHexagonsToScreen() {
int i = 0;
Double[] points = new Double[map.getMap().size() * 12];
for(Hex hex : map.getMap()) {
Point[] corners = screen.polygonCorners(hex);
for(Point point : corners) {
points[i] = point.getX();
points[i+1] = point.getY();
i += 2;
}
}
this.root.getChildren().add(drawHexagon(points));
}
This resulted in the second picture. I think the solution requires that I specify "only connect each point to its closest other point", but I am unsure of how to do this. Is there a simple solution to my problem?
The reason the hex map is off in the top left corner is because I'm specifying the origin of my hex map to be 0,0 and calculating a pixel location as such. Obviously I have done something wrong in converting my 0,0 hexagon location to correspond with the center of the Pane and growing Y+ in the up direction and X+ in the right direction.