地图

gamebackground.py

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+import pygame
+
+# 地图
+
+
+class GameBackground(object):
+    # 初始化地图
+    def __init__(self, scene):
+        # 加载相同张图片资源,做交替实现地图滚动
+        self.image1 = pygame.image.load("images/bg/bg1.jpg")
+        self.image2 = pygame.image.load("images/bg/bg1.jpg")
+        # 保存场景对象
+        self.main_scene = scene
+        # 辅助移动地图
+        self.image1_rect = self.image1.get_rect()
+        self.image2_rect = self.image2.get_rect()
+        self.y1 = self.main_scene.size[1] - self.image1_rect.height
+        self.y2 = self.y1 - self.image2_rect.height
+
+    # 计算地图图片绘制坐标
+    def action(self):
+        self.y1 = self.y1 + 1
+        self.y2 = self.y2 + 1
+        if self.y1 >= self.main_scene.size[1]:
+            self.y1 = self.y2 - self.image1_rect.height
+        if self.y2 >= self.main_scene.size[1]:
+            self.y2 = self.y1 - self.image2_rect.height
+
+    # 绘制地图的两张图片
+    def draw(self):
+        self.main_scene.scene.blit(self.image1, (0, self.y1))
+        self.main_scene.scene.blit(self.image2, (0, self.y2))