"""
加载一个csv格式的地图。csv文件是地图的图块映射列表。里面是按行存储的数字。每行的每个数字映射地图中图块的编号。
"""
import arcade
import os
SPRITE_SCALING = 0.5
SCREEN_WIDTH = 800
SCREEN_HEIGHT = 600
SCREEN_TITLE = "Python街机arcade模块加载csv地图示例程序"
SPRITE_PIXEL_SIZE = 128
GRID_PIXEL_SIZE = (SPRITE_PIXEL_SIZE * SPRITE_SCALING)
# How many pixels to keep as a minimum margin between the character
# and the edge of the screen.
VIEWPORT_MARGIN = 40
RIGHT_MARGIN = 150
# 物理参数
MOVEMENT_SPEED = 5
JUMP_SPEED = 14
GRAVITY = 0.5 # 代表重力加速度
def get_map(filename):
"""
加载逗号隔开数字的二维数字表，解析成嵌套列表。
"""
map_file = open(filename)
map_array = []
for line in map_file: # 文件中的每一行
line = line.strip() # 去掉空白字符
map_row = line.split(",") # 以逗号分隔
# 执行下列这个for循环是为了把item转换成整数，
# 相当于 map_row = [ int(item) for item in map_row ]
for index, item in enumerate(map_row):
map_row[index] = int(item)
map_array.append(map_row)
return map_array
class MyGame(arcade.Window):
""" 应用程序的主要类. """
def __init__(self):
"""
初始化方法
"""
super().__init__(SCREEN_WIDTH, SCREEN_HEIGHT, SCREEN_TITLE)
# 设置游戏的工作目录，这是为 "python -m" 启动程序而设
file_path = os.path.dirname(os.path.abspath(__file__))
os.chdir(file_path)
# 角色列表定义
self.wall_list = None
self.player_list = None
# 玩家定义
self.player_sprite = None
self.physics_engine = None
self.view_left = 0
self.view_bottom = 0
self.game_over = False
def setup(self):
""" 设置游戏的一些变量. """
# 实例化角色列表
self.player_list = arcade.SpriteList()
self.wall_list = arcade.SpriteList()
# 实例化玩家所操作角色
self.player_sprite = arcade.Sprite("images/character.png", SPRITE_SCALING)
# 角色起始坐标
self.player_sprite.center_x = 64
self.player_sprite.center_y = 270
self.player_list.append(self.player_sprite)
# 得到 2维地图的映射表
map_array = get_map("map.csv")
print(map_array)
# 得到地图最右边的像素值
self.end_of_map = len(map_array[0]) * GRID_PIXEL_SIZE # 地图宽度
# 下面取出每个图块编号，根据号码生成wall
for row_index, row in enumerate(map_array):
for column_index, item in enumerate(row):
# 对于此地图来说，
# -1 = empty 空
# 0 = box 盒子
# 1 = grass left edge 左边角草
# 2 = grass middle 中间的草
# 3 = grass right edge右边角草
if item == -1:
continue
elif item == 0:
wall = arcade.Sprite("images/boxCrate_double.png", SPRITE_SCALING)
elif item == 1:
wall = arcade.Sprite("images/grassLeft.png", SPRITE_SCALING)
elif item == 2:
wall = arcade.Sprite("images/grassMid.png", SPRITE_SCALING)
elif item == 3:
wall = arcade.Sprite("images/grassRight.png", SPRITE_SCALING)
wall.right = column_index * 64
wall.top = (7 - row_index) * 64
self.wall_list.append(wall)
self.physics_engine = \
arcade.PhysicsEnginePlatformer(self.player_sprite,
self.wall_list,
gravity_constant=GRAVITY)
# 设置背景颜色
arcade.set_background_color(arcade.color.AMAZON)
# Set the view port boundaries
# These numbers set where we have 'scrolled' to.
self.view_left = 0
self.view_bottom = 0
self.game_over = False
def on_draw(self):
"""
渲染屏幕
"""
# 此命令放在所有重绘命令之前
arcade.start_render()
# 画所有角色.
self.player_list.draw()
self.wall_list.draw()
# Put the text on the screen.
# Adjust the text position based on the view port so that we don't
# scroll the text too.
distance = self.player_sprite.right
output = f"Distance: {distance}"
arcade.draw_text(output, self.view_left + 10, self.view_bottom + 20, arcade.color.WHITE, 14)
if self.game_over:
arcade.draw_text("Game Over", self.view_left + 200, self.view_bottom + 200, arcade.color.WHITE, 30)
def on_key_press(self, key, modifiers):
"""
当按键时调用此方法
"""
if key == arcade.key.UP:
if self.physics_engine.can_jump():
self.player_sprite.change_y = JUMP_SPEED
elif key == arcade.key.LEFT:
self.player_sprite.change_x = -MOVEMENT_SPEED
elif key == arcade.key.RIGHT:
self.player_sprite.change_x = MOVEMENT_SPEED
def on_key_release(self, key, modifiers):
"""
当松开键时调用此方法
"""
if key == arcade.key.LEFT or key == arcade.key.RIGHT:
self.player_sprite.change_x = 0
def update(self, delta_time):
""" Movement and game logic """
if self.player_sprite.right >= self.end_of_map:
self.game_over = True
# 更新所有角色
if not self.game_over:
self.physics_engine.update()
# --- Manage Scrolling ---
# Track if we need to change the view port
changed = False
# Scroll left
left_bndry = self.view_left + VIEWPORT_MARGIN
if self.player_sprite.left < left_bndry:
self.view_left -= left_bndry - self.player_sprite.left
changed = True
# Scroll right
right_bndry = self.view_left + SCREEN_WIDTH - RIGHT_MARGIN
if self.player_sprite.right > right_bndry:
self.view_left += self.player_sprite.right - right_bndry
changed = True
# Scroll up
top_bndry = self.view_bottom + SCREEN_HEIGHT - VIEWPORT_MARGIN
if self.player_sprite.top > top_bndry:
self.view_bottom += self.player_sprite.top - top_bndry
changed = True
# Scroll down
bottom_bndry = self.view_bottom + VIEWPORT_MARGIN
if self.player_sprite.bottom < bottom_bndry:
self.view_bottom -= bottom_bndry - self.player_sprite.bottom
changed = True
print(self.player_sprite.left,self.view_left)
# If we need to scroll, go ahead and do it.
if changed:
arcade.set_viewport(self.view_left,
SCREEN_WIDTH + self.view_left,
self.view_bottom,
SCREEN_HEIGHT + self.view_bottom)
def main():
window = MyGame()
window.setup()
arcade.run()
if __name__ == "__main__":
main()
