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
/* *****************************************************************************
* The lines 71, 124, 132 and 140 are based on Xitari's code, from Google Inc.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* *****************************************************************************
* A.L.E (Arcade Learning Environment)
* Copyright (c) 2009-2013 by Yavar Naddaf, Joel Veness, Marc G. Bellemare and
* the Reinforcement Learning and Artificial Intelligence Laboratory
* Released under the GNU General Public License; see License.txt for details.
*
* Based on: Stella -- "An Atari 2600 VCS Emulator"
* Copyright (c) 1995-2007 by Bradford W. Mott and the Stella team
*
* *****************************************************************************
*/
#include "RoadRunner.hpp"
#include "../RomUtils.hpp"
namespace ale {
RoadRunnerSettings::RoadRunnerSettings() { reset(); }
/* create a new instance of the rom */
RomSettings* RoadRunnerSettings::clone() const {
RomSettings* rval = new RoadRunnerSettings();
*rval = *this;
return rval;
}
/* process the latest information from ALE */
void RoadRunnerSettings::step(const System& system) {
// update the reward
int score = 0, mult = 1;
for (int digit = 0; digit < 4; digit++) {
int value = readRam(&system, 0xC9 + digit) & 0xF;
// 0xA represents '0, don't display'
if (value == 0xA)
value = 0;
score += mult * value;
mult *= 10;
}
score *= 100;
int reward = score - m_score;
m_reward = reward;
m_score = score;
// update terminal status
int lives_byte = readRam(&system, 0xC4) & 0x7;
int y_vel = readRam(&system, 0xB9);
int x_vel_death = readRam(&system, 0xBD);
m_terminal = (lives_byte == 0 && (y_vel != 0 || x_vel_death != 0));
m_lives = lives_byte + 1;
}
/* is end of game */
bool RoadRunnerSettings::isTerminal() const { return m_terminal; };
/* get the most recently observed reward */
reward_t RoadRunnerSettings::getReward() const { return m_reward; }
/* is an action part of the minimal set? */
bool RoadRunnerSettings::isMinimal(const Action& a) const {
switch (a) {
case PLAYER_A_NOOP:
case PLAYER_A_FIRE:
case PLAYER_A_UP:
case PLAYER_A_RIGHT:
case PLAYER_A_LEFT:
case PLAYER_A_DOWN:
case PLAYER_A_UPRIGHT:
case PLAYER_A_UPLEFT:
case PLAYER_A_DOWNRIGHT:
case PLAYER_A_DOWNLEFT:
case PLAYER_A_UPFIRE:
case PLAYER_A_RIGHTFIRE:
case PLAYER_A_LEFTFIRE:
case PLAYER_A_DOWNFIRE:
case PLAYER_A_UPRIGHTFIRE:
case PLAYER_A_UPLEFTFIRE:
case PLAYER_A_DOWNRIGHTFIRE:
case PLAYER_A_DOWNLEFTFIRE:
return true;
default:
return false;
}
}
/* reset the state of the game */
void RoadRunnerSettings::reset() {
m_reward = 0;
m_score = 0;
m_terminal = false;
m_lives = 3;
}
/* saves the state of the rom settings */
void RoadRunnerSettings::saveState(Serializer& ser) {
ser.putInt(m_reward);
ser.putInt(m_score);
ser.putBool(m_terminal);
ser.putInt(m_lives);
}
// loads the state of the rom settings
void RoadRunnerSettings::loadState(Deserializer& ser) {
m_reward = ser.getInt();
m_score = ser.getInt();
m_terminal = ser.getBool();
m_lives = ser.getInt();
}
} // namespace ale