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SnakeGame.cs
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SnakeGame.cs
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using System;
using System.Collections;
namespace Snake;
public class Point
{
public int X { get; set; }
public int Y { get; set; }
public Point(int x, int y)
{
X = x;
Y = y;
}
public Point(Point point)
{
X = point.X;
Y = point.Y;
}
}
public enum SnakeDirection : byte
{
Up,
Down,
Left,
Right,
Stop, //to start
}
public partial class SnakeGame
{
public int Score { get; private set; }
public int Level { get; private set; }
public int BoardWidth { get; private set; }
public int BoardHeight { get; private set; }
public ArrayList SnakePosition { get; private set; }
public Point FoodPosition { get; private set; }
public SnakeDirection Direction { get; private set; }
public bool PlaySound { get; private set; }
Random rand = new Random();
enum CellType : byte
{
Empty,
Food,
}
public SnakeGame()
{
}
void UpdateGameState()
{
Score++;
PlaySound = false;
if (Direction == SnakeDirection.Stop)
return;
var head = new Point((Point)SnakePosition[0]);
var tail = new Point((Point)SnakePosition[SnakePosition.Count - 1]);
if (Direction == SnakeDirection.Left)
{ head.X--; }
if (Direction == SnakeDirection.Right)
{ head.X++; }
if (Direction == SnakeDirection.Up)
{ head.Y--; }
if (Direction == SnakeDirection.Down)
{ head.Y++; }
for (int i = 0; i < SnakePosition.Count - 1; i++)
{
SnakePosition[SnakePosition.Count - 1 - i] = new Point((Point)SnakePosition[SnakePosition.Count - 2 - i]);
}
SnakePosition[0] = head;
if (IsCellEmpty(head.X, head.Y, true) == false)
{
Reset();
}
if (head.X == FoodPosition.X && head.Y == FoodPosition.Y)
{
SnakePosition.Add(tail);
UpdateFood();
PlaySound = true;
}
}
public void Reset()
{
SnakePosition = new ArrayList();
SnakePosition.Add(new Point(BoardWidth / 2, BoardHeight / 2));
Direction = SnakeDirection.Stop;
Level = 0;
Score = 0;
UpdateFood();
}
void UpdateFood()
{
int foodX, foodY;
do
{
foodX = rand.Next() % BoardWidth - 1;
foodY = rand.Next() % BoardHeight - 1;
}
while (IsCellEmpty(foodX, foodY) == false);
FoodPosition = new Point(foodX, foodY);
Level++;
}
bool IsCellEmpty(int x, int y, bool ignoreHead = false)
{
Point snakeBody;
if (x < 0 ||
y < 0 ||
x >= BoardWidth ||
y >= BoardHeight)
return false;
for (int i = ignoreHead ? 1 : 0; i < SnakePosition.Count; i++)
{
snakeBody = (Point)SnakePosition[i];
if (snakeBody.X == x && snakeBody.Y == y)
{
return false;
}
}
return true;
}
public void Left()
{
Direction = SnakeDirection.Left;
}
public void Right()
{
Direction = SnakeDirection.Right;
}
public void Up()
{
Direction = SnakeDirection.Up;
}
public void Down()
{
Direction = SnakeDirection.Down;
}
}