Having a Bash at Travel in BIND

They say you have to playtest, but they forget that I'm a lazy man, so when it came to travel rules, I didn't feel like simulating a bunch of journeys. So it's time to get the computer to do the work for me.

Setup

An encounter roll occurs every 1D6 intervals in BIND (where an interval = 'one quarter of the day' = '6 hours').

Travel rates are around 10 miles per day for a caravan on a road, so to travel 50 miles, the troupe will need 5 days (i.e. 20 intervals). In bash, we can represent these rules as so:

 1roll_an_encounter(){
 2    encounters=0
 3    miles=$1
 4    intervals_required="$(calc $miles / 2.5 )"
 5    while [ "$intervals_required" -gt 0 ]
 6    do
 7        encounter_time=$(( RANDOM %6 +1))
 8        encounters=$(( encounters + 1 ))
 9        intervals_required=$(calc $intervals_required - $encounter_time )
10    done
11    echo "Encounters: $encounters"
12}

Now we can plot a full journey of 30 miles with one command:

1roll_an_encounter 30

Some of the first or last encounters are sometimes replaced with traders, but the longer the journey, the less 'beginning' and 'end' there is.

1Time remaining: 	8 intervals
2Time remaining: 	6 intervals
3Time remaining: 	3 intervals
4Time remaining: 	2 intervals
5Time remaining: 	-2 intervals
6Encounters: 5

Currently, a good deal of journeys will be 30 miles, and 5 encounter rolls just seems too much!

The longest of journeys could go up to 80 miles (i.e. 8 days of travel).

1roll_an_encounter 80

This looks much worse...

 1Time remaining: 	26 intervals
 2Time remaining: 	22 intervals
 3Time remaining: 	20 intervals
 4Time remaining: 	19 intervals
 5Time remaining: 	17 intervals
 6Time remaining: 	12 intervals
 7Time remaining: 	9 intervals
 8Time remaining: 	6 intervals
 9Time remaining: 	3 intervals
10Time remaining: 	0 intervals
11Encounters: 10

In fact, it's unplayable. This entire session would be a series of fights with various beasties - hardly 'background noise'!

Halving Distance

Repeating that with half the usual distance, we can ask the computer for lots-and-lots of rolls, and get the following:

That looks rather more workable; perhaps a touch on the high side, but that's a burden for the rest of the system to bear. The best remedy here is keeping the encounters snappy, and fun.