background images

movement of chopper

chopper.py

@@ -8,9 +8,37 @@ class Chopper:
     self.STATE_FRONT=0
     self.STATE_RIGHT=1
     self.STATE_LEFT = 2
+
+    # directions of movement
+    self.UP = 0
+    self.DOWN = 1
+    self.LEFT = 2
+    self.RIGHT = 3
+
     self.images = {}
 
 
   def add_sprite(self,state,sprite):
     self.images[state] = sprite
 
+  def move(self,direction):
+    match direction:
+      case self.UP:
+        self.state = self.STATE_FRONT
+        if self.ypos > 2:
+          self.ypos -= 2
+      case self.DOWN:
+        self.state = self.STATE_FRONT
+        self.ypos +=2
+      case self.LEFT:
+        self.state = self.STATE_LEFT
+        if self.xpos > 2:
+          self.xpos -=2
+      case self.RIGHT:
+        self.state = self.STATE_RIGHT
+        self.xpos += 2
+      
+  def current_image(self):
+    return self.images[self.state]
+
+

chopper_demo.py

@@ -7,10 +7,9 @@ class Fort:
   def __init__(self):
     print('init()')
     pygame.init()
-    pygame.display.set_mode((640, 480))
-    self.chopper_x = 100
-    self.chopper_y = 100
-    self.screen = pygame.display.set_mode((800, 600))
+    pygame.display.set_mode((384, 240))
+    self.background =pygame.image.load('background/fort_02.png')
+    self.screen = pygame.display.set_mode((384, 240))
     self.chopper_front = pygame.image.load("sprites/chopper_front.png").convert()
     self.chopper_side_right = pygame.image.load("sprites/chopper_side_right.png").convert()
     self.chopper_moving_left = pygame.image.load("sprites/chopper_moving_left.png").convert()
@@ -22,7 +21,8 @@ class Fort:
 
   def mainloop(self):
     running = True
-    self.screen.blit(self.chopper_front, (self.chopper_x, self.chopper_y))
+    self.screen.blit(self.background,(0,0))
+    self.screen.blit(self.chopper_front, (self.chopper.xpos, self.chopper.ypos))
 #    self.screen.blit(self.chopper_side_right, (100, 100))
 #    self.screen.blit(self.chopper_moving_left, (150, 150))
     pygame.display.flip()
@@ -36,16 +36,15 @@ class Fort:
             case pygame.QUIT:
               running = False
             case pygame.K_RIGHT:
-              print('right')
-              self.screen.blit(self.chopper_side_right,(self.chopper_x,self.chopper_y))
+              self.chopper.move(self.chopper.RIGHT)
             case pygame.K_LEFT:
-              print('left')
-              self.screen.blit(self.chopper_moving_left,(self.chopper_x,self.chopper_y))
-
+              self.chopper.move(self.chopper.LEFT)
+            case pygame.K_UP:
+              self.chopper.move(self.chopper.UP)
             case pygame.K_DOWN:
-              print('down')
-              self.screen.blit(self.chopper_front,(self.chopper_x,self.chopper_y))
+              self.chopper.move(self.chopper.DOWN)
         
+          self.screen.blit(self.chopper.current_image(),(self.chopper.xpos,self.chopper.ypos))
           pygame.display.flip()
 if __name__ == '__main__':
   fort = Fort()