-
Notifications
You must be signed in to change notification settings - Fork 0
/
Board.cs
244 lines (229 loc) · 7.85 KB
/
Board.cs
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
using System;
using System.Collections.Generic;
using System.Linq;
using System.Numerics;
using System.Threading;
namespace _2048
{
/// <summary>
/// Contains all game logic
/// </summary>
public class Board
{
private readonly int size;
private readonly int[,] state;
private readonly Random random = new Random();
public bool Win => state.Cast<int>().Any(x => x == 2048);
public bool Lose => state.Cast<int>().All(x => x > 0) && !CanMerge();
public Board(int size = 4)
{
this.size = size;
state = new int[size, size];
FillRandom();
FillRandom();
}
/// <summary>
/// Draws board state
/// </summary>
public void Draw()
{
Console.Clear();
foreach (int i in Enumerable.Range(0, size))
Console.Write("+----");
Console.WriteLine("+");
for (int y = 0; y < size; y++)
{
for (int x = 0; x < size; x++)
{
Console.Write("|");
Console.ForegroundColor = GetColor(state[y, x]);
Console.Write($"{state[y, x],4}");
Console.ForegroundColor = ConsoleColor.White;
}
Console.WriteLine("|");
foreach (int i in Enumerable.Range(0, size))
Console.Write("+----");
Console.WriteLine("+");
}
}
/// <summary>
/// Fills some random <c>0</c> with a <c>2</c>
/// </summary>
public void FillRandom()
{
IEnumerable<Vector2> possible = EmptySpaces();
Vector2 rand = possible.ElementAt(random.Next(0, possible.Count()));
state[(int)rand.Y, (int)rand.X] = 2;
}
/// <summary>
/// Parses input key to movement direction
/// </summary>
/// <param name="key"></param>
/// <returns></returns>
public static Direction ParseKey(ConsoleKey key)
{
return key switch
{
ConsoleKey.UpArrow => Direction.UP,
ConsoleKey.DownArrow => Direction.DOWN,
ConsoleKey.LeftArrow => Direction.LEFT,
ConsoleKey.RightArrow => Direction.RIGHT,
_ => Direction.NONE,
};
}
/// <summary>
/// Moves all pieces in a direction
/// Fills random space if something moved
/// </summary>
/// <param name="direction"></param>
public void Move(Direction direction)
{
// Keep shifting in that direction until none behind
bool moved = false;
for (int i = 0; i < size; i++)
{
if (Shift(direction))
{
moved = true;
Thread.Sleep(50);
// No need to draw on last iteration
if (i < size - 1)
Draw();
}
else
{
break;
}
}
if (moved)
{
FillRandom();
Draw();
}
}
/// <summary>
/// Gets all <c>0</c> spaces
/// </summary>
/// <returns>Empty spaces</returns>
private IEnumerable<Vector2> EmptySpaces()
{
List<Vector2> empty = new List<Vector2>();
for (int y = 0; y < size; y++)
for (int x = 0; x < size; x++)
if (state[y, x] == 0)
empty.Add(new Vector2(x, y));
return empty;
}
/// <summary>
/// Shifts all squares
/// </summary>
/// <returns><c>true</c> if at least 1 square was moved</returns>
private bool Shift(Direction direction)
{
bool moved = false;
if (direction == Direction.DOWN || direction == Direction.RIGHT)
{
for (int y = size - 1; y >= 0; y--)
for (int x = size - 1; x >= 0; x--)
if (MoveSpace(direction, x, y))
moved = true;
}
else
{
for (int y = 0; y < size; y++)
for (int x = 0; x < size; x++)
if (MoveSpace(direction, x, y))
moved = true;
}
return moved;
}
/// <summary>
/// Moves space in direction, merges if possible
/// </summary>
/// <param name="direction"></param>
/// <param name="x"></param>
/// <param name="y"></param>
/// <returns><c>true</c> if merged or moved</returns>
private bool MoveSpace(Direction direction, int x, int y)
{
if (state[y, x] > 0)
{
Vector2 current = new Vector2(x, y);
Vector2 front = current + direction.Vector();
if (IsValid(front) && state.GetValue(front) == 0)
{
Swap(current, front);
return true;
}
// Merging
else if (IsValid(front) && state.GetValue(current) == state.GetValue(front))
{
state[(int)front.Y, (int)front.X] = state.GetValue(front) * 2;
state[(int)current.Y, (int)current.X] = 0;
return true;
}
}
return false;
}
/// <summary>
/// Swaps 2 points
/// </summary>
/// <param name="p1"></param>
/// <param name="p2"></param>
private void Swap(Vector2 p1, Vector2 p2)
{
int tmp = state.GetValue(p1);
state[(int)p1.Y, (int)p1.X] = state.GetValue(p2);
state[(int)p2.Y, (int)p2.X] = tmp;
}
/// <summary>
/// Checks if this point is valid
/// </summary>
/// <param name="position"></param>
/// <returns></returns>
private bool IsValid(Vector2 position)
{
return position.X >= 0 && position.Y >= 0 && position.X < size && position.Y < size;
}
/// <summary>
/// Checks if any neighbors can be merged
/// </summary>
/// <returns><c>True if some neighbor can be merged</c></returns>
private bool CanMerge()
{
for (int y = 0; y < size; y++)
for (int x = 0; x < size; x++)
foreach (Direction direction in Enum.GetValues(typeof(Direction)).Cast<Direction>().Where(d => d != Direction.NONE))
{
Vector2 current = new Vector2(x, y);
Vector2 neighbor = current + direction.Vector();
if (IsValid(neighbor) && state.GetValue(current) == state.GetValue(neighbor))
return true;
}
return false;
}
/// <summary>
/// Gets color for a number in the game
/// </summary>
/// <param name="number"></param>
/// <returns></returns>
private static ConsoleColor GetColor(int number)
{
return number switch
{
2 => ConsoleColor.DarkCyan,
4 => ConsoleColor.Cyan,
8 => ConsoleColor.Green,
16 => ConsoleColor.DarkYellow,
32 => ConsoleColor.Yellow,
64 => ConsoleColor.DarkMagenta,
128 => ConsoleColor.Magenta,
256 => ConsoleColor.DarkBlue,
512 => ConsoleColor.Blue,
1024 => ConsoleColor.DarkRed,
2048 => ConsoleColor.Red,
_ => ConsoleColor.White
};
}
}
}