subtracting one die from another

**addax** · December 6th, 2012, 01:53

Has anyone created a ruleset or have an idea as to how one would modify a ruleset to allow subtracting once die from another? A member of my group would like to run Alternity again and while we can work around a lot of stuff having the simple ability to say roll a d20 and subtract a d6 from it would speed up gameplay significantly. I've noted some other virtual tabletops that have that built in and I'm actually surprised I can't seem to do that with FG2.

Thank you for your time.

**Valarian** · December 6th, 2012, 08:59

There is at least one ruleset that does it. If I recall, it sets up "minus" dice as custom dice which can be used in die roll (e.g. /die 1d6+1m6 would be a d6 and a minus d6).
https://www.fantasygrounds.com/modguide/resources.xcp

**hawkwind** · December 6th, 2012, 13:40

this would be very handy for Fate based games

**Insanity** · December 8th, 2012, 01:32

The Call of Cthulhu ruleset has negative dice.

As Valarian says, i.e. m4, m6, etc...

The code is in the gameelements.xml file, and looks like this.

Code:

<customdie name="m4">
    <model>d4</model>
    <menuicon>customdice</menuicon>
    <script>
      function onValue(result)
        return -result;
      end
    </script>
  </customdie>

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