142 lines
4.0 KiB
C#
142 lines
4.0 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace 贪吃蛇
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{
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enum E_MoveDirection
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{
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Up,
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Down,
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Left,
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Right
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}
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class Snake : IDraw
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{
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E_MoveDirection moveDirection;//记录蛇当前的移动方向
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SnakeBody[] bodies; //存放蛇身体的数组
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int nowNum;//用一个变量记录蛇的长度
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public Snake(int x, int y)
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{
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moveDirection = E_MoveDirection.Right;
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bodies = new SnakeBody[200];
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bodies[0] = new SnakeBody(x, y, E_BodyType.Head);
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nowNum = 1;
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}
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public void Draw()
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{
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//只画出当前的蛇身
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for (int i = 0; i < nowNum; i++)
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{
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bodies[i].Draw();
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}
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}
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#region Lesson7
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//蛇的移动
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public void Move()
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{
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//移动前擦除前一个位置
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SnakeBody lastBody = bodies[nowNum - 1];
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Console.SetCursorPosition(lastBody.pos.x, lastBody.pos.y);
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Console.Write(" ");
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for(int i = nowNum - 1; i > 0; i--)
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{
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bodies[i].pos = bodies[i - 1].pos;
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}
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switch (moveDirection)
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{
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case E_MoveDirection.Up:
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bodies[0].pos.y--;
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break;
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case E_MoveDirection.Down:
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bodies[0].pos.y++;
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break;
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case E_MoveDirection.Left:
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bodies[0].pos.x -= 2;
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break;
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case E_MoveDirection.Right:
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bodies[0].pos.x += 2;
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break;
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}
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}
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#endregion
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#region Lesson8
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public void ChangeDirection(E_MoveDirection newDirection)
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{
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//不能直接掉头
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if ( newDirection == moveDirection ||
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nowNum > 1 && (moveDirection == E_MoveDirection.Right && newDirection == E_MoveDirection.Left ) ||
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nowNum > 1 && (moveDirection == E_MoveDirection.Left && newDirection == E_MoveDirection.Right) ||
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nowNum > 1 && (moveDirection == E_MoveDirection.Up && newDirection == E_MoveDirection.Down) ||
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nowNum > 1 && (moveDirection == E_MoveDirection.Down && newDirection == E_MoveDirection.Up) )
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{
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return;
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}
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moveDirection = newDirection;
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}
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#endregion
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#region Lesson9
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//碰撞检测
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public bool CheckEnd(Map map)
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{
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//是否和墙体位置重合
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for(int i = 0; i < map.walls.Length; i++)
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{
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if (bodies[0].pos == map.walls[i].pos)
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{
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return true;
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}
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}
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//是否和自己身体位置重合
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for(int i = 1; i < nowNum; i++)
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{
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if (bodies[0].pos == bodies[i].pos)
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{
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return true;
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}
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}
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return false;
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}
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#endregion
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#region Lesson10
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public bool CheckSamePos(Position p)
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{
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for(int i = 0; i < nowNum; i++)
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{
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if (bodies[i].pos == p)
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{
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return true;
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}
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}
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return false;
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}
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public void CheckEat(Food food)
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{
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if (bodies[0].pos == food.pos)
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{
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//吃到了就再次随机生成食物，并且让蛇变长
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food.RandomPos(this);
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GrowUp();
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}
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}
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#endregion
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#region Lesson11
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private void GrowUp()
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{
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SnakeBody lastBody = bodies[nowNum - 1];
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bodies[nowNum] = new SnakeBody(lastBody.pos.x, lastBody.pos.y, E_BodyType.Body);
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nowNum++;
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}
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#endregion
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}
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}
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