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unit rpgdice;
{This unit handles some of my frequently-wanted dice}
{routines.}
{
GearHead: Arena, a roguelike mecha CRPG
Copyright (C) 2005 Joseph Hewitt
This library is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or (at
your option) any later version.
The full text of the LGPL can be found in license.txt.
This library is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this library; if not, write to the Free Software Foundation,
Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
}
{ *** GFX CLEARED! *** }
interface
Const
DieSize: Array [1..5] of byte = (4,6,8,10,12);
DieStep: Array [1..10,1..5] of byte = (
{ d4 d6 d8 d10 d12 }
( 1, 0, 0, 0, 0),
( 0, 1, 0, 0, 0),
( 0, 0, 1, 0, 0),
( 0, 0, 0, 1, 0),
( 0, 0, 0, 0, 1),
( 0, 1, 1, 0, 0),
( 0, 1, 0, 1, 0),
( 0, 0, 1, 1, 0),
( 0, 0, 0, 2, 0),
( 0, 0, 0, 1, 1)
);
Function Dice(die: integer): Integer;
Function RollStep(n: Integer): Integer;
Function RollStat(n: integer): integer;
{Roll Nd6; take the three highest values, add them together,}
{and return the result. N must be in the range of 1 to 10.}
implementation
Function Dice(die: integer): Integer;
{Roll a die- D(6), D(8), D(100), whatever.}
{Die rolling is done as per Earthdawn- whenever a maximum is}
{rolled, the score is kept and the die rerolled. }
var
total,dr: Integer;
begin
{Range check}
if die < 2 then die := 2;
total := 0;
repeat
dr := Random( die ) + 1;
total := total + dr;
until dr <> Die;
Dice := total;
end;
Function RollStep(n: Integer): Integer;
{Roll a dice step number, a la Earthdawn.}
var
N2,t1,t2,RS: Integer;
begin
RS := 0;
While N > 0 do begin
if N > 10 then
N2 := 10
else
N2 := N;
for t1 := 1 to 5 do begin
if DieStep[N2,t1] > 0 then begin
for t2 := 1 to DieStep[N2,t1] do RS := RS + Dice(DieSize[t1]);
end;
end;
{Decrease N by 10.}
N := N - 10;
end;
RollStep := RS;
end;
Function RollStat(n: integer): integer;
{Roll Nd6; take the three highest values, add them together,}
{and return the result. N must be in the range of 1 to 10.}
var
k: array [1..10] of integer;
t,tt: integer; {Loop counters.}
l: integer; {in theory, the low value.}
stat: integer; {The total value rolled}
begin
{Range check.}
if n>10 then n := 10;
{Initialize stat}
stat := 0;
{Roll the indicated number of dice.}
for t := 1 to n do begin
{Roll the die}
k[t] := Random(6) + 1;
{Add it to the total}
stat := stat + k[t];
end;
{If we rolled more dice than we need, go through and eliminate}
{the low rolls.}
if n > 3 then for t := 1 to n-3 do begin
{locate the first nonzero value for l}
l := 1;
while k[l] = 0 do Inc(l);
for tt := 1 to n do begin
if (k[tt] > 0) and (k[tt] < k[l]) then l := tt
end;
stat := stat - k[l];
k[l] := 0;
end;
RollStat := stat;
end;
initialization
{Set the random seed}
Randomize;
end.
|
