Method dataLines

src/main/java/field/graphics/FLine.java:599–604

This takes a list of "things" and successively transforms them into a list of (list of...) Vec3 or Vec2. Each of the transformation rules are tried in turn (and in order) and anything that returns non-null terminates the transformation for that "turn". Collections are understood. All exceptions are

(Collection<Object> input, Function<Object, Object>... transformation)

	}

	private void doDataLines(Collection<Object> m) {
		boolean first = true;
		for (Object o : m) {
			if (o instanceof Vec2) {
				if (first) moveTo((Vec2) o);
				else lineTo((Vec2) o);
				first = false;
			} else if (o instanceof Vec3) {
				if (first) moveTo((Vec3) o);