1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
|
/*
===========================================================================
Copyright (C) 1999-2005 Id Software, Inc.
Copyright (C) 2000-2006 Tim Angus
This file is part of Tremulous.
Tremulous is free software; you can redistribute it
and/or modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2 of the License,
or (at your option) any later version.
Tremulous 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with Tremulous; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
===========================================================================
*/
/*****************************************************************************
* name: be_ai_gen.c
*
* desc: genetic selection
*
* $Archive: /MissionPack/code/botlib/be_ai_gen.c $
*
*****************************************************************************/
#include "../qcommon/q_shared.h"
#include "l_memory.h"
#include "l_log.h"
#include "l_utils.h"
#include "l_script.h"
#include "l_precomp.h"
#include "l_struct.h"
#include "aasfile.h"
#include "botlib.h"
#include "be_aas.h"
#include "be_aas_funcs.h"
#include "be_interface.h"
#include "be_ai_gen.h"
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
int GeneticSelection(int numranks, float *rankings)
{
float sum, select;
int i, index;
sum = 0;
for (i = 0; i < numranks; i++)
{
if (rankings[i] < 0) continue;
sum += rankings[i];
} //end for
if (sum > 0)
{
//select a bot where the ones with the higest rankings have
//the highest chance of being selected
select = random() * sum;
for (i = 0; i < numranks; i++)
{
if (rankings[i] < 0) continue;
sum -= rankings[i];
if (sum <= 0) return i;
} //end for
} //end if
//select a bot randomly
index = random() * numranks;
for (i = 0; i < numranks; i++)
{
if (rankings[index] >= 0) return index;
index = (index + 1) % numranks;
} //end for
return 0;
} //end of the function GeneticSelection
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
int GeneticParentsAndChildSelection(int numranks, float *ranks, int *parent1, int *parent2, int *child)
{
float rankings[256], max;
int i;
if (numranks > 256)
{
botimport.Print(PRT_WARNING, "GeneticParentsAndChildSelection: too many bots\n");
*parent1 = *parent2 = *child = 0;
return qfalse;
} //end if
for (max = 0, i = 0; i < numranks; i++)
{
if (ranks[i] < 0) continue;
max++;
} //end for
if (max < 3)
{
botimport.Print(PRT_WARNING, "GeneticParentsAndChildSelection: too few valid bots\n");
*parent1 = *parent2 = *child = 0;
return qfalse;
} //end if
Com_Memcpy(rankings, ranks, sizeof(float) * numranks);
//select first parent
*parent1 = GeneticSelection(numranks, rankings);
rankings[*parent1] = -1;
//select second parent
*parent2 = GeneticSelection(numranks, rankings);
rankings[*parent2] = -1;
//reverse the rankings
max = 0;
for (i = 0; i < numranks; i++)
{
if (rankings[i] < 0) continue;
if (rankings[i] > max) max = rankings[i];
} //end for
for (i = 0; i < numranks; i++)
{
if (rankings[i] < 0) continue;
rankings[i] = max - rankings[i];
} //end for
//select child
*child = GeneticSelection(numranks, rankings);
return qtrue;
} //end of the function GeneticParentsAndChildSelection
|
