FilesExpand file tree

 master

/

SnakeAI.java

Copy path

Blame

More file actions

Blame

More file actions

Latest commit

 

History

History

History

275 lines (255 loc) · 6.9 KB

 master

/

SnakeAI.java

Copy path

Top

File metadata and controls

• Code
• Blame

275 lines (255 loc) · 6.9 KB

Raw

Copy raw file

Download raw file

Open symbols panel

Edit and raw actions

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

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

226

227

228

229

230

231

232

233

234

235

236

237

238

239

240

241

242

243

244

245

246

247

248

249

250

251

252

253

254

255

256

257

258

259

260

261

262

263

264

265

266

267

268

269

270

271

272

273

274

275

import java.awt.Color;

import java.util.ArrayList;

/**

* AI for the Snake Game.

*

* @author Jin Kim

* @author David Melisso

* @version 13 May 2016

*/

public class SnakeAI extends SnakeGame

{

/**

* Constructor for objects of class SnakeAI

*/

public SnakeAI(Color color, int sp)

{

super(color, sp);

}

public SnakeAI(Color color)

{

this(color, 10);

}

public SnakeAI(int sp)

{

this(Color.BLUE, sp);

}

/**

* Default constructor for SnakeAI

*/

public SnakeAI()

{

this(Color.BLUE, 10);

}

/**

* Changes the direction of the snake

*

* @return the direction it changed to

*/

public String change()

{

Location foodLocation = foodLocator();

Location headLocation = snake.getHeadLocation();

int headRow = headLocation.getRow();

int headCol = headLocation.getCol();

MyBoundedGrid<Block> grid = getGrid();

int[][] mat;

String res;

try

{

mat = grid.makeNumberGrid(headLocation, foodLocation);

}

catch (IllegalArgumentException e)

{

try

{

mat = grid.makeNumberGrid(headLocation, snake.getTailLocation());

}

catch (IllegalArgumentException i)

{

try

{

String destination = directionFarthestFromBarrier();

int sp = spacesToBarrierDirection(destination);

mat = grid.makeNumberGrid(headLocation, getLocationFromHead(headLocation, destination, sp));

}

catch (IllegalArgumentException p)

{

res = snake.getDirection();

if (isDirectionClear(res))

{

return res;

}

else

{

res = snake.getRightDirection();

if (isDirectionClear(res))

{

snake.changeDirection(res);

return res;

}

else

{

res = snake.getLeftDirection();

snake.changeDirection(res);

return res;

}

}

}

}

}

ArrayList<Location> adjacents = grid.getValidAdjacentLocations(headLocation);

int smallestVal = Integer.MAX_VALUE;

int dir = 0;

for(int i = 0; i < adjacents.size(); i++)

{

Location loc = adjacents.get(i);

int cur = mat[loc.getRow()][loc.getCol()];

if (cur < smallestVal && cur!=0 && cur!=-2)

{

smallestVal = cur;

dir = i;

}

}

res = directionFromHead(adjacents.get(dir));

snake.changeDirection(res);

return res;

}

public boolean isDirectionClear(String direction)

{

Location test = getLocationFromHead(snake.getHeadLocation(), direction, 1);

try

{

return getGrid().get(test)==null;

}

catch (IndexOutOfBoundsException e)

{

return false;

}

}

public String directionFromHead(Location loc)

{

Location head = snake.getHeadLocation();

int locRow = loc.getRow();

int locCol = loc.getCol();

Location locUP = new Location(locRow-1, locCol);

Location locDOWN = new Location(locRow+1, locCol);

Location locRIGHT = new Location(locRow, locCol+1);

Location locLEFT = new Location(locRow, locCol-1);

if (head.equals(locUP))

{

return "DOWN";

}

if (head.equals(locDOWN))

{

return "UP";

}

if (head.equals(locRIGHT))

{

return "LEFT";

}

if (head.equals(locLEFT))

{

return "RIGHT";

}

return "";

}

public String directionFarthestFromBarrier()

{

int right = spacesToBarrierDirection(snake.getRightDirection());

int left = spacesToBarrierDirection(snake.getLeftDirection());

int forward = spacesToBarrierDirection(snake.getDirection());

int max = Math.max(Math.max(right, left), forward);

if(max == right)

{

return snake.getRightDirection();

}

else if(max == left)

{

return snake.getLeftDirection();

}

else

{

return snake.getDirection();

}

}

public int spacesToBarrierDirection(String dir)

{

Location headLoc = snake.getHeadLocation();

MyBoundedGrid<Block> grid = getGrid();

int spaces = 1;

Location test = getLocationFromHead(headLoc, dir, spaces);

while(grid.isValid(test) && test == null)

{

test = getLocationFromHead(headLoc, dir, spaces++);

}

spaces--;

return spaces;

}

public Location getLocationFromHead(Location loc, String direc, int spaces)

{

int row = loc.getRow();

int col = loc.getCol();

Location res = snake.getHeadLocation();

if (direc.equals("RIGHT"))

{

res = new Location(row, col+spaces);

}

else if (direc.equals("LEFT"))

{

res = new Location(row, col-spaces);

}

else if (direc.equals("DOWN"))

{

res = new Location(row+spaces, col);

}

else if (direc.equals("UP"))

{

res = new Location(row-spaces, col);

}

return res;

}

/**

* Runs the game

*/

public void play()

{

spawnFoodStuff();

while(playay)

{

try

{

Thread.sleep(getWaitTime());

change();

if(snake.determineDirection()) //we need a new method to get the direction of the snake.

{

display.showBlocks();

}

else

{

//snake dies here.

gameOver(false);

}

}

catch(InterruptedException e)

{

//ignore

}

}

}

/*

public int disLeftWall()

{

return snakeHead.getCol();

}

public int disRightWall()

{

return aiGrid.getNumCols() - snakeHead.getCol();

}

public int disDownWall()

{

return aiGrid.getNumRows() - snakeHead.getRow();

}

public int disUpWall()

{

return snakeHead.getRow();

}

*/

/**

* Gets the Location of the Food

*/

public Location foodLocator()

{

return getFoodStuffSpawningLocation();

}

}