private int[] drawLine(Point startPoint, Point endPoint, int thickness) {
		int dX = Math.abs(startPoint.x - endPoint.x);
		int dY = Math.abs(startPoint.y - endPoint.y);
		double aTan;
		aTan = Math.atan((double) dY / (double) dX);
		int offsetX = (int) Math.ceil(Math.sin(aTan) * thickness / 2);
		int offsetY = (int) Math.ceil(Math.cos(aTan) * thickness / 2);
		boolean startPointLower = startPoint.y > endPoint.y;
		if (startPointLower) {
			p1 = new Point(startPoint.x - offsetX, startPoint.y - offsetY);
			p2 = new Point(endPoint.x - offsetX, endPoint.y - offsetY);
			p3 = new Point(endPoint.x + offsetX, endPoint.y + offsetY);
			p4 = new Point(startPoint.x + offsetX, startPoint.y + offsetY);
		} else {
			p1 = new Point(startPoint.x + offsetX, startPoint.y - offsetY);
			p2 = new Point(endPoint.x + offsetX, endPoint.y - offsetY);
			p3 = new Point(endPoint.x - offsetX, endPoint.y + offsetY);
			p4 = new Point(startPoint.x - offsetX, startPoint.y + offsetY);
		}
		int minX = getMinX();
		int minY = getMinY();
		if (minX < 0) {
			this.offsetX = Math.abs(minX);
		} else {
			this.offsetY = 0;
		}
		if (minY < 0) {
			this.offsetY = Math.abs(minY);
		} else {
			this.offsetY = 0;
		}
		return new int[] { p1.x + this.offsetX, p1.y + this.offsetY,
				p2.x + this.offsetX, p2.y + this.offsetY, p3.x + this.offsetX,
				p3.y + this.offsetY, p4.x + this.offsetX, p4.y + this.offsetY };
	}