private void buildHexagonGrid(double gridWidth) {
        double halfSideLength = sideLength / 2;
        double height = Math.sqrt(3)/2 * width;

        double xOffset = sideLength + halfSideLength;
        double yOffset = width;

        double xPos = 0;
        while(xPos < edgeOfMap.x + width + sideLength) {
            double yPos = 0;
            while(yPos < edgeOfMap.y + sideLength) {

                hexagons.add( new Hexagon(
                        new Point(xPos,yPos + sideLength),
                        new Point(xPos + halfSideLength , yPos),
                        new Point(xPos + halfSideLength, yPos + width),
                        new Point(xPos + sideLength, yPos + sideLength),
                        new Point(xPos + sideLength + halfSideLength, yPos),
                        new Point(xPos + sideLength + halfSideLength, yPos + width),
                        new Point(xPos + width, yPos + sideLength)
                ));

                hexagons.add( new Hexagon(
                        new Point(xPos + xOffset,yPos + sideLength - yOffset),
                        new Point(xPos + halfSideLength + xOffset, yPos - yOffset),
                        new Point(xPos + halfSideLength + xOffset, yPos + width - yOffset),
                        new Point(xPos + sideLength + xOffset, yPos + sideLength - yOffset),
                        new Point(xPos + sideLength + halfSideLength + xOffset, yPos - yOffset),
                        new Point(xPos + sideLength + halfSideLength + xOffset, yPos + width - yOffset),
                        new Point(xPos + width + xOffset, yPos + sideLength - yOffset)
                ));
                yPos += height;
            }
            xPos += width += sideLength;
        }
    }