hedgewars/uRandom.pas
author nemo
Sat, 04 Aug 2012 22:26:51 -0400
changeset 7489 43a998fbacfe
parent 7389 15c3fb4882df
child 7575 f415b3e0f3b9
permissions -rw-r--r--
Also flag cases. Side effect might be some odd collision in rare cases w/ portals. Also, might cause unexpected collisions w/ cases in TestColl - although we could add a proximity check to the flag there, or simply switch to TestCollExcludingMe again. uCollisions seems mismatched w/ AI TestColl anyway. Possibly r+1+r vs r+r for gear diametre.
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
4
bcbd7adb4e4b - set svn:eol-style to native
unc0rr
parents: 1
diff changeset
     1
(*
1066
1f1b3686a2b0 Update copyright headers a bit
unc0rr
parents: 920
diff changeset
     2
 * Hedgewars, a free turn based strategy game
6700
e04da46ee43c the most important commit of the year
koda
parents: 6580
diff changeset
     3
 * Copyright (c) 2004-2012 Andrey Korotaev <unC0Rr@gmail.com>
4
bcbd7adb4e4b - set svn:eol-style to native
unc0rr
parents: 1
diff changeset
     4
 *
183
57c2ef19f719 Relicense to GPL
unc0rr
parents: 155
diff changeset
     5
 * This program is free software; you can redistribute it and/or modify
57c2ef19f719 Relicense to GPL
unc0rr
parents: 155
diff changeset
     6
 * it under the terms of the GNU General Public License as published by
57c2ef19f719 Relicense to GPL
unc0rr
parents: 155
diff changeset
     7
 * the Free Software Foundation; version 2 of the License
4
bcbd7adb4e4b - set svn:eol-style to native
unc0rr
parents: 1
diff changeset
     8
 *
183
57c2ef19f719 Relicense to GPL
unc0rr
parents: 155
diff changeset
     9
 * This program is distributed in the hope that it will be useful,
57c2ef19f719 Relicense to GPL
unc0rr
parents: 155
diff changeset
    10
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
57c2ef19f719 Relicense to GPL
unc0rr
parents: 155
diff changeset
    11
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
57c2ef19f719 Relicense to GPL
unc0rr
parents: 155
diff changeset
    12
 * GNU General Public License for more details.
4
bcbd7adb4e4b - set svn:eol-style to native
unc0rr
parents: 1
diff changeset
    13
 *
183
57c2ef19f719 Relicense to GPL
unc0rr
parents: 155
diff changeset
    14
 * You should have received a copy of the GNU General Public License
57c2ef19f719 Relicense to GPL
unc0rr
parents: 155
diff changeset
    15
 * along with this program; if not, write to the Free Software
57c2ef19f719 Relicense to GPL
unc0rr
parents: 155
diff changeset
    16
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
4
bcbd7adb4e4b - set svn:eol-style to native
unc0rr
parents: 1
diff changeset
    17
 *)
bcbd7adb4e4b - set svn:eol-style to native
unc0rr
parents: 1
diff changeset
    18
2630
079ef82eac75 revamped file access and debug display
koda
parents: 2599
diff changeset
    19
{$INCLUDE "options.inc"}
079ef82eac75 revamped file access and debug display
koda
parents: 2599
diff changeset
    20
4
bcbd7adb4e4b - set svn:eol-style to native
unc0rr
parents: 1
diff changeset
    21
unit uRandom;
5123
b0b57f247e02 guess what. comments. yay for burning commits
sheepluva
parents: 4976
diff changeset
    22
(*
b0b57f247e02 guess what. comments. yay for burning commits
sheepluva
parents: 4976
diff changeset
    23
 * This unit supplies platform-independent functions for getting various
b0b57f247e02 guess what. comments. yay for burning commits
sheepluva
parents: 4976
diff changeset
    24
 * pseudo-random values based on a shared seed.
b0b57f247e02 guess what. comments. yay for burning commits
sheepluva
parents: 4976
diff changeset
    25
 *
b0b57f247e02 guess what. comments. yay for burning commits
sheepluva
parents: 4976
diff changeset
    26
 * This is necessary for accomplishing pseudo-random behavior in the game
b0b57f247e02 guess what. comments. yay for burning commits
sheepluva
parents: 4976
diff changeset
    27
 * without causing a desynchronisation of different clients when playing over
b0b57f247e02 guess what. comments. yay for burning commits
sheepluva
parents: 4976
diff changeset
    28
 * a network.
b0b57f247e02 guess what. comments. yay for burning commits
sheepluva
parents: 4976
diff changeset
    29
 *)
4
bcbd7adb4e4b - set svn:eol-style to native
unc0rr
parents: 1
diff changeset
    30
interface
351
29bc9c36ad5f Fixed-point arithmetics in engine.
unc0rr
parents: 320
diff changeset
    31
uses uFloat;
4
bcbd7adb4e4b - set svn:eol-style to native
unc0rr
parents: 1
diff changeset
    32
3038
4e48c276a468 In pascal unit is a namespace
unc0rr
parents: 2948
diff changeset
    33
procedure initModule;
4e48c276a468 In pascal unit is a namespace
unc0rr
parents: 2948
diff changeset
    34
procedure freeModule;
2716
b9ca1bfca24f complete the replacement of init/free wrappers for every unit
koda
parents: 2699
diff changeset
    35
5123
b0b57f247e02 guess what. comments. yay for burning commits
sheepluva
parents: 4976
diff changeset
    36
procedure SetRandomSeed(Seed: shortstring); // Sets the seed that should be used for generating pseudo-random values.
7001
89488f5b99ca GetRandom -> GetRandomf
unc0rr
parents: 6700
diff changeset
    37
function  GetRandomf: hwFloat; overload; // Returns a pseudo-random hwFloat.
7389
15c3fb4882df Sorry about the slight delay in pickup. You can blame a few lame cheaters. This is to make their cheating a bit harder.
nemo
parents: 7043
diff changeset
    38
function  GetRandom(m: LongWord): LongWord; overload; inline; // Returns a positive pseudo-random integer smaller than m.
15c3fb4882df Sorry about the slight delay in pickup. You can blame a few lame cheaters. This is to make their cheating a bit harder.
nemo
parents: 7043
diff changeset
    39
procedure AddRandomness(r: LongWord); inline;
5123
b0b57f247e02 guess what. comments. yay for burning commits
sheepluva
parents: 4976
diff changeset
    40
function  rndSign(num: hwFloat): hwFloat; // Returns num with a random chance of having a inverted sign.
4
bcbd7adb4e4b - set svn:eol-style to native
unc0rr
parents: 1
diff changeset
    41
7389
15c3fb4882df Sorry about the slight delay in pickup. You can blame a few lame cheaters. This is to make their cheating a bit harder.
nemo
parents: 7043
diff changeset
    42
4
bcbd7adb4e4b - set svn:eol-style to native
unc0rr
parents: 1
diff changeset
    43
implementation
3295
ced0ee8280ad fix building without DEBUGFILE
koda
parents: 3284
diff changeset
    44
102
c45643d3fd78 New faster random generator
unc0rr
parents: 22
diff changeset
    45
var cirbuf: array[0..63] of Longword;
2699
249adefa9c1c replace initialization/finalization statements with custom init functions
koda
parents: 2630
diff changeset
    46
    n: byte;
4
bcbd7adb4e4b - set svn:eol-style to native
unc0rr
parents: 1
diff changeset
    47
7389
15c3fb4882df Sorry about the slight delay in pickup. You can blame a few lame cheaters. This is to make their cheating a bit harder.
nemo
parents: 7043
diff changeset
    48
procedure AddRandomness(r: LongWord); inline;
15c3fb4882df Sorry about the slight delay in pickup. You can blame a few lame cheaters. This is to make their cheating a bit harder.
nemo
parents: 7043
diff changeset
    49
begin
15c3fb4882df Sorry about the slight delay in pickup. You can blame a few lame cheaters. This is to make their cheating a bit harder.
nemo
parents: 7043
diff changeset
    50
n:= (n + 1) and $3F;
15c3fb4882df Sorry about the slight delay in pickup. You can blame a few lame cheaters. This is to make their cheating a bit harder.
nemo
parents: 7043
diff changeset
    51
cirbuf[n]:= cirbuf[n] xor r
15c3fb4882df Sorry about the slight delay in pickup. You can blame a few lame cheaters. This is to make their cheating a bit harder.
nemo
parents: 7043
diff changeset
    52
end;
15c3fb4882df Sorry about the slight delay in pickup. You can blame a few lame cheaters. This is to make their cheating a bit harder.
nemo
parents: 7043
diff changeset
    53
15c3fb4882df Sorry about the slight delay in pickup. You can blame a few lame cheaters. This is to make their cheating a bit harder.
nemo
parents: 7043
diff changeset
    54
function GetNext: Longword; inline;
4
bcbd7adb4e4b - set svn:eol-style to native
unc0rr
parents: 1
diff changeset
    55
begin
102
c45643d3fd78 New faster random generator
unc0rr
parents: 22
diff changeset
    56
n:= (n + 1) and $3F;
c45643d3fd78 New faster random generator
unc0rr
parents: 22
diff changeset
    57
cirbuf[n]:=
105
e7cb9bb4a9de - Fixed integer->longint
unc0rr
parents: 102
diff changeset
    58
           (cirbuf[(n + 40) and $3F] +           {n - 24 mod 64}
e7cb9bb4a9de - Fixed integer->longint
unc0rr
parents: 102
diff changeset
    59
            cirbuf[(n +  9) and $3F])            {n - 55 mod 64}
e7cb9bb4a9de - Fixed integer->longint
unc0rr
parents: 102
diff changeset
    60
            and $7FFFFFFF;                       {mod 2^31}
136
89970b70b076 Implement bot levels
unc0rr
parents: 130
diff changeset
    61
351
29bc9c36ad5f Fixed-point arithmetics in engine.
unc0rr
parents: 320
diff changeset
    62
GetNext:= cirbuf[n]
102
c45643d3fd78 New faster random generator
unc0rr
parents: 22
diff changeset
    63
end;
c45643d3fd78 New faster random generator
unc0rr
parents: 22
diff changeset
    64
c45643d3fd78 New faster random generator
unc0rr
parents: 22
diff changeset
    65
procedure SetRandomSeed(Seed: shortstring);
c45643d3fd78 New faster random generator
unc0rr
parents: 22
diff changeset
    66
var i: Longword;
c45643d3fd78 New faster random generator
unc0rr
parents: 22
diff changeset
    67
begin
155
401f4ea24715 Engine can generate land preview and send it via IPC
unc0rr
parents: 136
diff changeset
    68
n:= 54;
401f4ea24715 Engine can generate land preview and send it via IPC
unc0rr
parents: 136
diff changeset
    69
6580
6155187bf599 A partial reformatting of the pascal code to have consistent syntax. Things that are still inconsistent.
lovelacer
parents: 5123
diff changeset
    70
if Length(Seed) > 54 then
6155187bf599 A partial reformatting of the pascal code to have consistent syntax. Things that are still inconsistent.
lovelacer
parents: 5123
diff changeset
    71
    Seed:= copy(Seed, 1, 54); // not 55 to ensure we have odd numbers in cirbuf
102
c45643d3fd78 New faster random generator
unc0rr
parents: 22
diff changeset
    72
527
e23490ce1f06 - One more land template
unc0rr
parents: 431
diff changeset
    73
for i:= 0 to Pred(Length(Seed)) do
e23490ce1f06 - One more land template
unc0rr
parents: 431
diff changeset
    74
    cirbuf[i]:= byte(Seed[i + 1]);
102
c45643d3fd78 New faster random generator
unc0rr
parents: 22
diff changeset
    75
124
75b892eff74d Fixed PRNG to properly use seed string
unc0rr
parents: 107
diff changeset
    76
for i:= Length(Seed) to 54 do
4665
fa7ad5f3725f Make basic training solvable again. Freeze RNG at current version for less of this kind of issue in future, and a bit more savable of seeds. Disable offsets in preparation for release.
nemo
parents: 4363
diff changeset
    77
    cirbuf[i]:= $A98765 + 68; // odd number
130
19e3c16fb9f0 Fix engine PRNG (accidentally deleted a line)
unc0rr
parents: 124
diff changeset
    78
6580
6155187bf599 A partial reformatting of the pascal code to have consistent syntax. Things that are still inconsistent.
lovelacer
parents: 5123
diff changeset
    79
for i:= 0 to 1023 do
6155187bf599 A partial reformatting of the pascal code to have consistent syntax. Things that are still inconsistent.
lovelacer
parents: 5123
diff changeset
    80
    GetNext
4
bcbd7adb4e4b - set svn:eol-style to native
unc0rr
parents: 1
diff changeset
    81
end;
bcbd7adb4e4b - set svn:eol-style to native
unc0rr
parents: 1
diff changeset
    82
7001
89488f5b99ca GetRandom -> GetRandomf
unc0rr
parents: 6700
diff changeset
    83
function GetRandomf: hwFloat;
4
bcbd7adb4e4b - set svn:eol-style to native
unc0rr
parents: 1
diff changeset
    84
begin
351
29bc9c36ad5f Fixed-point arithmetics in engine.
unc0rr
parents: 320
diff changeset
    85
GetNext;
7001
89488f5b99ca GetRandom -> GetRandomf
unc0rr
parents: 6700
diff changeset
    86
GetRandomf.isNegative:= false;
89488f5b99ca GetRandom -> GetRandomf
unc0rr
parents: 6700
diff changeset
    87
GetRandomf.QWordValue:= GetNext
4
bcbd7adb4e4b - set svn:eol-style to native
unc0rr
parents: 1
diff changeset
    88
end;
bcbd7adb4e4b - set svn:eol-style to native
unc0rr
parents: 1
diff changeset
    89
7389
15c3fb4882df Sorry about the slight delay in pickup. You can blame a few lame cheaters. This is to make their cheating a bit harder.
nemo
parents: 7043
diff changeset
    90
function GetRandom(m: LongWord): LongWord; inline;
4
bcbd7adb4e4b - set svn:eol-style to native
unc0rr
parents: 1
diff changeset
    91
begin
105
e7cb9bb4a9de - Fixed integer->longint
unc0rr
parents: 102
diff changeset
    92
GetNext;
351
29bc9c36ad5f Fixed-point arithmetics in engine.
unc0rr
parents: 320
diff changeset
    93
GetRandom:= GetNext mod m
4
bcbd7adb4e4b - set svn:eol-style to native
unc0rr
parents: 1
diff changeset
    94
end;
bcbd7adb4e4b - set svn:eol-style to native
unc0rr
parents: 1
diff changeset
    95
915
33040b7695c0 - Some changes in clusters initialization
unc0rr
parents: 527
diff changeset
    96
function rndSign(num: hwFloat): hwFloat;
33040b7695c0 - Some changes in clusters initialization
unc0rr
parents: 527
diff changeset
    97
begin
33040b7695c0 - Some changes in clusters initialization
unc0rr
parents: 527
diff changeset
    98
num.isNegative:= odd(GetNext);
33040b7695c0 - Some changes in clusters initialization
unc0rr
parents: 527
diff changeset
    99
rndSign:= num
33040b7695c0 - Some changes in clusters initialization
unc0rr
parents: 527
diff changeset
   100
end;
33040b7695c0 - Some changes in clusters initialization
unc0rr
parents: 527
diff changeset
   101
3038
4e48c276a468 In pascal unit is a namespace
unc0rr
parents: 2948
diff changeset
   102
procedure initModule;
2699
249adefa9c1c replace initialization/finalization statements with custom init functions
koda
parents: 2630
diff changeset
   103
begin
2948
3f21a9dc93d0 Replace tabs with spaces using 'expand -t 4' command
unc0rr
parents: 2924
diff changeset
   104
    n:= 54;
3369
c7289e42f0ee add other controls for map preview, also fix a bug in digest
koda
parents: 3295
diff changeset
   105
    FillChar(cirbuf, 64*sizeof(Longword), 0);
2699
249adefa9c1c replace initialization/finalization statements with custom init functions
koda
parents: 2630
diff changeset
   106
end;
249adefa9c1c replace initialization/finalization statements with custom init functions
koda
parents: 2630
diff changeset
   107
3038
4e48c276a468 In pascal unit is a namespace
unc0rr
parents: 2948
diff changeset
   108
procedure freeModule;
2716
b9ca1bfca24f complete the replacement of init/free wrappers for every unit
koda
parents: 2699
diff changeset
   109
begin
b9ca1bfca24f complete the replacement of init/free wrappers for every unit
koda
parents: 2699
diff changeset
   110
b9ca1bfca24f complete the replacement of init/free wrappers for every unit
koda
parents: 2699
diff changeset
   111
end;
b9ca1bfca24f complete the replacement of init/free wrappers for every unit
koda
parents: 2699
diff changeset
   112
4
bcbd7adb4e4b - set svn:eol-style to native
unc0rr
parents: 1
diff changeset
   113
end.