手把手教你从零开始使用python编写大型冒险类游戏02之人物行走

import pygame
import time
import sys
from enum import Enum

BG_COLOR = (200,200,200)
PLAYER_COLOR = (200,100,100)
SCREEN_SIZE = (500,500)
PLAYER_SPEED = 9
PLAYER_SIZE = (50, 50)
PLAYER_START_POS = (100, 400)

class Box:
    def __init__(self, start_pos, size):
        self.x = start_pos[0]
        self.y = start_pos[1]
        self.w = size[0]
        self.h = size[1]

    def rect(self):
        return (self.x, self.y, self.w, self.h)

class Direction(Enum):
    LEFT = 1
    RIGHT = 2
    UP = 3
    DOWN = 4

pygame.init()
screen = pygame.display.set_mode(SCREEN_SIZE)
player = Box(PLAYER_START_POS, PLAYER_SIZE)
direction = Direction.RIGHT
speed = 0
clock = pygame.time.Clock()
FPS=30
while(True):
    clock.tick(FPS)
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            sys.exit()
        if event.type == pygame.KEYDOWN:
            if event.key == pygame.K_LEFT:
                direction = Direction.LEFT
                speed = PLAYER_SPEED
            elif event.key == pygame.K_RIGHT:
                direction = Direction.RIGHT
                speed = PLAYER_SPEED
            elif event.key == pygame.K_UP:
                direction = Direction.UP
                speed = PLAYER_SPEED
            elif event.key == pygame.K_DOWN:
                direction = Direction.DOWN
                speed = PLAYER_SPEED
        if event.type == pygame.KEYUP:
            speed = 0

    if direction == Direction.LEFT:
        player.x -= speed
    elif direction == Direction.RIGHT:
        player.x += speed
    elif direction == Direction.UP:
        player.y -= speed
    elif direction == Direction.DOWN:
        player.y += speed

    if player.x < 0:
        player.x = 0
    elif player.x > SCREEN_SIZE[0] - player.w:
        player.x = SCREEN_SIZE[0] - player.w
    if player.y < 0:
        player.y = 0
    elif player.y > SCREEN_SIZE[1] - player.h:
        player.y = SCREEN_SIZE[1] - player.h

    screen.fill(BG_COLOR)
    pygame.draw.rect(screen, PLAYER_COLOR, player.rect())
    pygame.display.update()

import pygame
import sys


BG_COLOR = (200,200,200)
PLAYER_COLOR = (200,100,100)
SCREEN_SIZE = (800,600)
PLAYER_SPEED = 9
PLAYER_SIZE = (50, 25)
PLAYER_START_POS = (100, 100)

class Box:
    def __init__(self, pos, size, color):
        self.x = pos[0]
        self.y = pos[1]
        self.w = size[0]
        self.h = size[1]
        self.color = color

    def rect(self):
        return (self.x, self.y, self.w, self.h)

class PlayerBox:
    def __init__(self, box, direction, speed, max_speed):
        self.box = box
        self.direction = direction
        self.speed = speed
        self.max_speed = max_speed

    def set_moving_in_dir(self, direction):
        self.direction = direction
        self.speed = self.max_speed

    def set_not_moving(self):
        self.speed = 0

class Direction:
    LEFT = 1
    RIGHT = 2
    UP = 3
    DOWN = 4

pygame.init()
screen = pygame.display.set_mode(SCREEN_SIZE)
player = PlayerBox(Box(PLAYER_START_POS, PLAYER_SIZE, PLAYER_COLOR), Direction.RIGHT, 0, PLAYER_SPEED)

clock = pygame.time.Clock()
FPS=30
while True:
    clock.tick(FPS)
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            sys.exit()
        if event.type == pygame.KEYDOWN:
            if event.key == pygame.K_LEFT:
                player.set_moving_in_dir(Direction.LEFT)
            elif event.key == pygame.K_RIGHT:
                player.set_moving_in_dir(Direction.RIGHT)
            elif event.key == pygame.K_UP:
                player.set_moving_in_dir(Direction.UP)
            elif event.key == pygame.K_DOWN:
                player.set_moving_in_dir(Direction.DOWN)
        if event.type == pygame.KEYUP:
            player.set_not_moving()

    if player.direction == Direction.LEFT:
        player.box.x = max(player.box.x - player.speed, 0)
    elif player.direction == Direction.RIGHT:
        player.box.x = min(player.box.x + player.speed, SCREEN_SIZE[0] - player.box.w)
    elif player.direction == Direction.UP:
        player.box.y = max(player.box.y - player.speed, 0)
    elif player.direction == Direction.DOWN:
        player.box.y = min(player.box.y + player.speed, SCREEN_SIZE[1] - player.box.h)

    screen.fill(BG_COLOR)
    pygame.draw.rect(screen, player.box.color, player.box.rect())
    pygame.display.update()