贪吃蛇小游戏 - Project1 - Powered by Discuz!

#==============================================================================
# ■ Scene_Snake
#------------------------------------------------------------------------------
# 　贪吃蛇小游戏
#==============================================================================
class Scene_Snake
#--------------------------------------------------------------------------
# ● 初始化对像
#--------------------------------------------------------------------------
def initialize
$SIZE = 30 # 图块大小
$WIDTH = 30 * 16 #界面宽度
$HEIGHT = 30 * 16 #界面高度
@score = 0 # 初始分数
@level = 1 # 初始化难度等级
@max_length = 35 # 初始化贪吃蛇最大长度
@array_snake = [[3,6],[4,6],[5,6],[6,6],[7,6],[8,6],[9,6]] # 初始化贪吃蛇
@speed = 7 # 初始化速度,数值越大，移动速度越慢
@direction = "left" # 初始化方向
@run = false # 初始化贪吃蛇是否为运动状态
@time_count = 0 # 计时器
@food_exist = false # 标记食物是否存在
end
#--------------------------------------------------------------------------
# ● 主处理
#--------------------------------------------------------------------------
def main
# 贪吃蛇背景
@sprite = Sprite.new
@sprite.bitmap = Bitmap.new(640,480)
@sprite.bitmap.fill_rect(0, 0, 640, 480, Color.new(0,0,0))
# 初始化屏幕
@sprite_clear = Sprite.new
@sprite_clear.bitmap = Bitmap.new($WIDTH,$HEIGHT)
@sprite_clear.bitmap.fill_rect(0, 0, $WIDTH, $HEIGHT, Color.new(0,255,255))
@sprite_clear.bitmap.fill_rect(2, 2, $WIDTH - 4, $HEIGHT - 4, Color.new(0,0,0))
# 显示得分
@sprite_score = Sprite.new
@sprite_score.bitmap = Bitmap.new(640 - $WIDTH,$HEIGHT)
@sprite_score.x = 480
@sprite_score.y = 0
refresh_score
# 初始化蛇的图形
@sprite_snake = []
for i in 0...@array_snake.length
@sprite_snake[i] = Sprite.new
@sprite_snake[i].bitmap = Bitmap.new($SIZE,$SIZE)
@sprite_snake[i].x = @array_snake[i][0] * $SIZE
@sprite_snake[i].y = @array_snake[i][1] * $SIZE
@sprite_snake[i].bitmap.clear
@sprite_snake[i].bitmap.fill_rect(0, 0, $SIZE, $SIZE, Color.new(0,0,0))
@sprite_snake[i].bitmap.fill_rect(2, 2, $SIZE - 4, $SIZE - 4, Color.new(150,150,150))
@sprite_snake[i].bitmap.fill_rect(5, 5, $SIZE - 10, $SIZE - 10, Color.new(255,255,255))
end
# 描绘食物
@sprite_food = Sprite.new
@sprite_food.bitmap = Bitmap.new($SIZE,$SIZE)
# 执行过渡
Graphics.transition
# 主循环
loop do
# 刷新游戏画面
Graphics.update
# 刷新输入信息
Input.update
# 刷新画面情报
update
# 如果画面被切换的话就中断循环
if $scene != self
break
end
end
# 准备过渡
Graphics.freeze
end
#--------------------------------------------------------------------------
# ● 刷新画面
#--------------------------------------------------------------------------
def update
# 如果食物不存在则描绘食物
if @food_exist == false
draw_food # 描绘食物
@food_exist = true
end
# 开始运动
start_move
# 如果贪吃蛇正在运动
if @run
if @time_count%@speed == 0
move # 移动
# 吃到食物
if check_eat
# 刷新得分
@score += 1
# 刷新等级
if @score >= @level * 20
@level += 1
@speed -= 1
if @level > 6
p "恭喜你，你已成功通关！"
exit
end
end
refresh_score
# 增加贪吃蛇长度
if @array_snake.length < @max_length
@array_snake.push([@array_snake[@array_snake.length-1][0],
@array_snake[@array_snake.length-1][1]])
@sprite_snake[@array_snake.length-1] = Sprite.new
@sprite_snake[@array_snake.length-1].bitmap = Bitmap.new($SIZE,$SIZE)
end
@food_exist = false
end
# 如果撞到墙壁或自身则游戏结束
if check_collision
game_over
end
end
end
@time_count += 1
end
# 开始运动
def start_move
# 按下方向键后开始运动
if Input.trigger?(Input::UP)
unless @direction == "down"
@run = true
@direction = "up"
end
end
if Input.trigger?(Input::DOWN)
unless @direction == "up"
@run = true
@direction = "down"
end
end
if Input.trigger?(Input::LEFT)
unless @direction == "right"
@run = true
@direction = "left"
end
end
if Input.trigger?(Input::RIGHT)
unless @direction == "left"
@run = true
@direction = "right"
end
end
end
# 贪吃蛇移动
def move
case @direction
when "up"
for i in 1...@array_snake.length
@array_snake[@array_snake.length-i][0] = @array_snake[@array_snake.length-i-1][0]
@array_snake[@array_snake.length-i][1] = @array_snake[@array_snake.length-i-1][1]
end
@array_snake[0][1] -= 1
when "down"
for i in 1...@array_snake.length
@array_snake[@array_snake.length-i][0] = @array_snake[@array_snake.length-i-1][0]
@array_snake[@array_snake.length-i][1] = @array_snake[@array_snake.length-i-1][1]
end
@array_snake[0][1] += 1
when "left"
for i in 1...@array_snake.length
@array_snake[@array_snake.length-i][0] = @array_snake[@array_snake.length-i-1][0]
@array_snake[@array_snake.length-i][1] = @array_snake[@array_snake.length-i-1][1]
end
@array_snake[0][0] -= 1
when "right"
for i in 1...@array_snake.length
@array_snake[@array_snake.length-i][0] = @array_snake[@array_snake.length-i-1][0]
@array_snake[@array_snake.length-i][1] = @array_snake[@array_snake.length-i-1][1]
end
@array_snake[0][0] += 1
end
draw_snake # 描绘贪吃蛇
end
# 清屏
def clear_screen
@sprite_clear = Sprite.new
@sprite_clear.bitmap = Bitmap.new($WIDTH,$HEIGHT)
@sprite_clear.bitmap.clear
@sprite_clear.bitmap.fill_rect(0, 0, $WIDTH, $HEIGHT, Color.new(0,255,255))
@sprite_clear.bitmap.fill_rect(2, 2, $WIDTH - 4, $HEIGHT - 4, Color.new(0,0,0))
end
# 刷新得分
def refresh_score
@sprite_score.bitmap.clear
@sprite_score.bitmap.font.size = 18
@sprite_score.bitmap.draw_text(10, 0, 160, 32, "您的得分为：" + @score.to_s)
@sprite_score.bitmap.draw_text(10, 32, 160, 32, "蛇身长度为：" + @array_snake.length.to_s)
@sprite_score.bitmap.draw_text(10, 64, 160, 32, "当前等级为：" + @level.to_s)
@sprite_score.bitmap.draw_text(10, 440, 160, 32, "程序设计：flyfairy")
end
# 描绘图块
def draw_spriteset(x,y)
@sprite_spriteset = Sprite.new
@sprite_spriteset.bitmap = Bitmap.new($SIZE,$SIZE)
@sprite_spriteset.x = x
@sprite_spriteset.y = y
@sprite_spriteset.bitmap.clear
@sprite_spriteset.bitmap.fill_rect(0, 0, $SIZE, $SIZE, Color.new(0,0,0))
@sprite_spriteset.bitmap.fill_rect(2, 2, $SIZE - 4, $SIZE - 4, Color.new(150,150,150))
@sprite_spriteset.bitmap.fill_rect(5, 5, $SIZE - 10, $SIZE - 10, Color.new(255,255,255))
end
# 生成食物坐标
def creat_food
loop do
food_x = rand(16)
food_y = rand(16)
creat_succes = true # 标记是否成功生成的开关
for i in 0...@array_snake.length
if food_x == @array_snake[i][0] and food_y == @array_snake[i][1]
creat_succes = false
end
end
# 如果成功生成食物则中断循环
if creat_succes
return food_x * $SIZE,food_y * $SIZE
break
end
end
end
# 描绘食物
def draw_food
@food_x,@food_y = creat_food
@sprite_food.bitmap.clear
@sprite_food.x = @food_x
@sprite_food.y = @food_y
@sprite_food.bitmap.fill_rect(0, 0, $SIZE, $SIZE, Color.new(0,0,0))
@sprite_food.bitmap.fill_rect(2, 2, $SIZE - 4, $SIZE - 4, Color.new(50,50,200))
@sprite_food.bitmap.fill_rect(5, 5, $SIZE - 10, $SIZE - 10, Color.new(250,50,50))
end
# 描绘蛇的图形
def draw_snake
for i in 0...@array_snake.length
@sprite_snake[i].x = @array_snake[i][0] * $SIZE
@sprite_snake[i].y = @array_snake[i][1] * $SIZE
@sprite_snake[i].bitmap.clear
@sprite_snake[i].bitmap.fill_rect(0, 0, $SIZE, $SIZE, Color.new(0,0,0))
@sprite_snake[i].bitmap.fill_rect(2, 2, $SIZE - 4, $SIZE - 4, Color.new(150,150,150))
@sprite_snake[i].bitmap.fill_rect(5, 5, $SIZE - 10, $SIZE - 10, Color.new(255,255,255))
end
end
# 检测贪吃蛇是否撞到墙壁或自身
def check_collision
if @array_snake[0][0] < 0 or @array_snake[0][0] > 15 or
@array_snake[0][1] < 0 or @array_snake[0][1] > 15
return true
end
for i in 1...@array_snake.length
if @array_snake[0][0] == @array_snake[i][0] and
@array_snake[0][1] == @array_snake[i][1]
return true
end
end
return false
end
# 检测是否吃到食物
def check_eat
if @array_snake[0][0] == @food_x/$SIZE and @array_snake[0][1] == @food_y/$SIZE
return true
end
end
# 游戏结束的处理
def game_over
print "很遗憾，游戏结束!你的游戏得分为：#{@score}"
exit
end
end

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