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Refactor snake game #5

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362a910
Extract Directions, GameObjects and Positions into separate classes
Jan 10, 2020
d130074
Extract common logic into functions
Jan 10, 2020
102fcbc
Extract Direction setup and not coliding functions
Jan 10, 2020
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2 changes: 2 additions & 0 deletions .gitignore
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Original file line number Diff line number Diff line change
Expand Up @@ -37,6 +37,8 @@ x64/
*.vssscc
.builds

.vs/

# Visual C++ cache files
ipch/
*.aps
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16 changes: 16 additions & 0 deletions Snake/Direction.cs
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@@ -0,0 +1,16 @@
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Snake
{
public enum Direction
{
Right,
Left,
Down,
Up
}
}
20 changes: 20 additions & 0 deletions Snake/Position.cs
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@@ -0,0 +1,20 @@
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Snake
{
public struct Position
{
public int x;
public int y;

public Position(int x, int y)
{
this.x = x;
this.y = y;
}
}
}
243 changes: 137 additions & 106 deletions Snake/Program.cs
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Expand Up @@ -7,42 +7,25 @@

namespace Snake
{
struct Position
{
public int row;
public int col;
public Position(int row, int col)
{
this.row = row;
this.col = col;
}
}


class Program
{
static void Main(string[] args)
{
byte right = 0;
byte left = 1;
byte down = 2;
byte up = 3;
int lastFoodTime = 0;
int foodDissapearTime = 8000;
int negativePoints = 0;
const int FOOD_DISAPPEAR_TIME = 8000;

Position[] directions = new Position[]
static ICollection<Position> CreatePositions()
{
return new Position[]
{
new Position(0, 1), // right
new Position(0, -1), // left
new Position(1, 0), // down
new Position(-1, 0), // up
new Position(0, -1), // Left
new Position(1, 0), // Down
new Position(-1, 0), // Up
};
double sleepTime = 100;
int direction = right;
Random randomNumbersGenerator = new Random();
Console.BufferHeight = Console.WindowHeight;
lastFoodTime = Environment.TickCount;
}

static ICollection<Position> CreateObstacles()
{
List<Position> obstacles = new List<Position>()
{
new Position(12, 12),
Expand All @@ -51,72 +34,136 @@ static void Main(string[] args)
new Position(19, 19),
new Position(6, 9),
};

foreach (Position obstacle in obstacles)
{
Console.ForegroundColor = ConsoleColor.Cyan;
Console.SetCursorPosition(obstacle.col, obstacle.row);
Console.SetCursorPosition(obstacle.y, obstacle.x);
Console.Write("=");
}

return obstacles;
}

static Queue<Position> CreateSnake()
{
Queue<Position> snakeElements = new Queue<Position>();

for (int i = 0; i <= 5; i++)
{
snakeElements.Enqueue(new Position(0, i));
}

Position food;
return snakeElements;
}

static void AddGameObject(Position position, char symbol, ConsoleColor? color = null)
{
Console.SetCursorPosition(position.y, position.x);

if (color.HasValue)
{
Console.ForegroundColor = color.Value;
}

Console.Write(symbol);
}

static Position CreateRandomPosition()
{
Random randomNumbersGenerator = new Random();

var x = randomNumbersGenerator.Next(0, Console.WindowHeight);
var y = randomNumbersGenerator.Next(0, Console.WindowWidth);

return new Position(x,y);
}

static Position CreateNotColidingPosition(Queue<Position> snakeElements
, List<Position> obstacles)
{
Position gameObject;

do
{
food = new Position(randomNumbersGenerator.Next(0, Console.WindowHeight),
randomNumbersGenerator.Next(0, Console.WindowWidth));
gameObject = CreateRandomPosition();
}
while (snakeElements.Contains(gameObject) || obstacles.Contains(gameObject));

return gameObject;
}

static Direction GetDirection(Direction oldDirection)
{
Direction direction = oldDirection;

if (Console.KeyAvailable)
{
ConsoleKeyInfo userInput = Console.ReadKey();
if (userInput.Key == ConsoleKey.LeftArrow)
{
if (oldDirection != Direction.Right) direction = Direction.Left;
}
if (userInput.Key == ConsoleKey.RightArrow)
{
if (oldDirection != Direction.Left) direction = Direction.Right;
}
if (userInput.Key == ConsoleKey.UpArrow)
{
if (oldDirection != Direction.Down) direction = Direction.Up;
}
if (userInput.Key == ConsoleKey.DownArrow)
{
if (oldDirection != Direction.Up) direction = Direction.Down;
}
}
while (snakeElements.Contains(food) || obstacles.Contains(food));
Console.SetCursorPosition(food.col, food.row);
Console.ForegroundColor = ConsoleColor.Yellow;
Console.Write("@");

return direction;
}

static void Main(string[] args)
{
int lastFoodTime = 0;
int negativePoints = 0;

Position[] directions = CreatePositions().ToArray();

double sleepTime = 100;
Direction direction = Direction.Right;


Console.BufferHeight = Console.WindowHeight;
lastFoodTime = Environment.TickCount;

List<Position> obstacles = CreateObstacles().ToList();

Queue<Position> snakeElements = CreateSnake();

Position food = CreateNotColidingPosition(snakeElements, obstacles);

AddGameObject(food, '@', ConsoleColor.Yellow);

foreach (Position position in snakeElements)
{
Console.SetCursorPosition(position.col, position.row);
Console.ForegroundColor = ConsoleColor.DarkGray;
Console.Write("*");
AddGameObject(position, '*', ConsoleColor.DarkGray);
}

while (true)
{
negativePoints++;

if (Console.KeyAvailable)
{
ConsoleKeyInfo userInput = Console.ReadKey();
if (userInput.Key == ConsoleKey.LeftArrow)
{
if (direction != right) direction = left;
}
if (userInput.Key == ConsoleKey.RightArrow)
{
if (direction != left) direction = right;
}
if (userInput.Key == ConsoleKey.UpArrow)
{
if (direction != down) direction = up;
}
if (userInput.Key == ConsoleKey.DownArrow)
{
if (direction != up) direction = down;
}
}
direction = GetDirection(direction);

Position snakeHead = snakeElements.Last();
Position nextDirection = directions[direction];
Position nextDirection = directions[(int)direction];

Position snakeNewHead = new Position(snakeHead.row + nextDirection.row,
snakeHead.col + nextDirection.col);
Position snakeNewHead = new Position(snakeHead.x + nextDirection.x,
snakeHead.y + nextDirection.y);

if (snakeNewHead.col < 0) snakeNewHead.col = Console.WindowWidth - 1;
if (snakeNewHead.row < 0) snakeNewHead.row = Console.WindowHeight - 1;
if (snakeNewHead.row >= Console.WindowHeight) snakeNewHead.row = 0;
if (snakeNewHead.col >= Console.WindowWidth) snakeNewHead.col = 0;
if (snakeNewHead.y < 0) snakeNewHead.y = Console.WindowWidth - 1;
if (snakeNewHead.x < 0) snakeNewHead.x = Console.WindowHeight - 1;
if (snakeNewHead.x >= Console.WindowHeight) snakeNewHead.x = 0;
if (snakeNewHead.y >= Console.WindowWidth) snakeNewHead.y = 0;

if (snakeElements.Contains(snakeNewHead) || obstacles.Contains(snakeNewHead))
{
Expand All @@ -130,73 +177,57 @@ static void Main(string[] args)
return;
}

Console.SetCursorPosition(snakeHead.col, snakeHead.row);
Console.ForegroundColor = ConsoleColor.DarkGray;
Console.Write("*");
AddGameObject(snakeHead, '*', ConsoleColor.DarkGray);

snakeElements.Enqueue(snakeNewHead);
Console.SetCursorPosition(snakeNewHead.col, snakeNewHead.row);
Console.ForegroundColor = ConsoleColor.Gray;
if (direction == right) Console.Write(">");
if (direction == left) Console.Write("<");
if (direction == up) Console.Write("^");
if (direction == down) Console.Write("v");

char headSymbol = '>';
if (direction == Direction.Left) headSymbol = '<';
if (direction == Direction.Up) headSymbol = '^';
if (direction == Direction.Down) headSymbol = 'v';

if (snakeNewHead.col == food.col && snakeNewHead.row == food.row)
AddGameObject(snakeNewHead, headSymbol, ConsoleColor.Gray);

if (snakeNewHead.y == food.y && snakeNewHead.x == food.x)
{
// feeding the snake
do
{
food = new Position(randomNumbersGenerator.Next(0, Console.WindowHeight),
randomNumbersGenerator.Next(0, Console.WindowWidth));
}
while (snakeElements.Contains(food) || obstacles.Contains(food));
food = CreateNotColidingPosition(snakeElements, obstacles);

lastFoodTime = Environment.TickCount;
Console.SetCursorPosition(food.col, food.row);
Console.ForegroundColor = ConsoleColor.Yellow;
Console.Write("@");
AddGameObject(food, '@', ConsoleColor.Yellow);
sleepTime--;

Position obstacle = new Position();

do
{
obstacle = new Position(randomNumbersGenerator.Next(0, Console.WindowHeight),
randomNumbersGenerator.Next(0, Console.WindowWidth));
obstacle = CreateRandomPosition();
}
while (snakeElements.Contains(obstacle) ||
obstacles.Contains(obstacle) ||
(food.row != obstacle.row && food.col != obstacle.row));
(food.x != obstacle.x && food.y != obstacle.x));

obstacles.Add(obstacle);
Console.SetCursorPosition(obstacle.col, obstacle.row);
Console.ForegroundColor = ConsoleColor.Cyan;
Console.Write("=");

AddGameObject(obstacle, '=', ConsoleColor.Cyan);
}
else
{
// moving...
Position last = snakeElements.Dequeue();
Console.SetCursorPosition(last.col, last.row);
Console.Write(" ");
AddGameObject(snakeElements.Dequeue(), ' ');
}

if (Environment.TickCount - lastFoodTime >= foodDissapearTime)
if (Environment.TickCount - lastFoodTime >= FOOD_DISAPPEAR_TIME)
{
negativePoints = negativePoints + 50;
Console.SetCursorPosition(food.col, food.row);
Console.Write(" ");
do
{
food = new Position(randomNumbersGenerator.Next(0, Console.WindowHeight),
randomNumbersGenerator.Next(0, Console.WindowWidth));
}
while (snakeElements.Contains(food) || obstacles.Contains(food));
AddGameObject(food, ' ');

food = CreateNotColidingPosition(snakeElements, obstacles);

lastFoodTime = Environment.TickCount;
}

Console.SetCursorPosition(food.col, food.row);
Console.ForegroundColor = ConsoleColor.Yellow;
Console.Write("@");
AddGameObject(food, '@', ConsoleColor.Yellow);

sleepTime -= 0.01;

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2 changes: 2 additions & 0 deletions Snake/Snake.csproj
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Expand Up @@ -41,6 +41,8 @@
<Reference Include="System.Xml" />
</ItemGroup>
<ItemGroup>
<Compile Include="Direction.cs" />
<Compile Include="Position.cs" />
<Compile Include="Program.cs" />
<Compile Include="Properties\AssemblyInfo.cs" />
</ItemGroup>
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