mask-collision

Author: furas

pygame/mask-collision/README.md

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+# Mask collision 
+
+Not collide
+
+![#1](images/not-collide.png?raw=true)   
+
+Collide
+
+![#1](images/collide.png?raw=true)   
+

pygame/mask-collision/images/collide.png

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+#!/usr/bin/env python3
+
+#
+# pygame (empty) template - by furas
+#
+
+# ---------------------------------------------------------------------
+
+import pygame
+
+# === CONSTANS === (UPPER_CASE names)
+
+BLACK = (  0,   0,   0)
+WHITE = (255, 255, 255)
+
+RED   = (255,   0,   0)
+GREEN = (  0, 255,   0)
+BLUE  = (  0,   0, 255)
+
+SCREEN_WIDTH  = 600
+SCREEN_HEIGHT = 400
+
+# === CLASSES === (CamelCase names)
+
+class Image(pygame.sprite.Sprite):
+    
+    def __init__(self, screen_rect, angle=15, color=(255,0,0), rotate=5):
+        super().__init__()
+
+        self.angle = angle
+        self.rotate = rotate
+
+        self.original_image = pygame.Surface((100, 25)).convert_alpha()
+        self.original_image.fill(color)
+        self.original_image = pygame.transform.scale(self.original_image, (250,10))
+        
+        self.change_angle = pygame.time.get_ticks()
+            
+        self.update()
+        
+    def update(self):
+        if self.change_angle <= pygame.time.get_ticks():
+            self.angle = (self.angle + self.rotate) % 360
+            
+            self.image = pygame.transform.rotate(self.original_image, self.angle)
+            self.rect = self.image.get_rect(center=screen_rect.center)
+            self.mask = pygame.mask.from_surface(self.image)
+
+            self.olist = self.mask.outline()
+
+            #self.mask_image = pygame.Surface(self.rect.size, masks=self.mask) # ??? doesn't work as I expected
+
+            if self.olist:
+                pygame.draw.lines(self.image, (0, 0, 0), 3, self.olist)
+        
+            self.change_angle = pygame.time.get_ticks() + 50
+            
+    def draw(self, screen):
+        screen.blit(self.image, self.rect)
+        #screen.blit(self.mask_image, self.rect) # ??? doesn't work
+            
+# === FUNCTIONS === (lower_case names)
+
+    # empty
+    
+# === MAIN === (lower_case names)
+
+# --- (global) variables --- 
+
+# --- init ---
+
+pygame.init()
+
+screen = pygame.display.set_mode((SCREEN_WIDTH, SCREEN_HEIGHT))
+screen_rect = screen.get_rect()
+
+# --- objects ---
+
+img1 = Image(screen_rect, 45, (0,255,0))
+img2 = Image(screen_rect, 0, (0,255,255), 0)
+
+# --- mainloop ---
+
+clock = pygame.time.Clock()
+is_running = True
+
+while is_running:
+
+    # --- events ---
+    
+    for event in pygame.event.get():
+
+        # --- global events ---
+        
+        if event.type == pygame.QUIT:
+            is_running = False
+        elif event.type == pygame.KEYDOWN:
+            if event.key == pygame.K_ESCAPE:
+                is_running = False
+        elif event.type == pygame.MOUSEMOTION:
+            img2.rect.center = event.pos
+            
+        # --- objects events ---
+
+            # empty
+        
+    # --- updates ---
+
+    img1.update()
+    
+    if pygame.sprite.collide_mask(img1, img2):
+        bg_color = (255,200,200)
+    else:
+        bg_color = WHITE
+    
+    # --- draws ---
+    
+    screen.fill(bg_color)
+
+    img1.draw(screen)
+    img2.draw(screen)
+    
+    pygame.display.update()
+
+    # --- FPS ---
+
+    clock.tick(25)
+
+# --- the end ---
+    
+pygame.quit()

pygame/mask-collision/images/not-collide.png

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+I try to use [queue()](http://pygame.org/docs/ref/music.html#pygame.mixer.music.queue) but it doesn't work for me.
+Maybe it needs `for event` loop to work but it doesn't work for me too.
+
+In documentation below [queue()](http://pygame.org/docs/ref/music.html#pygame.mixer.music.queue) I found this comment:
+
+>    This method only queues one music file.  
+>    If you call it and there already is a queued file, it will be overrided.
+
+so queue is not so usefull.
+
+I use [pygame.mixer.music.set_endevent()](http://pygame.org/docs/ref/music.html#pygame.mixer.music.set_endevent) with `for event` loop to start next track.
+
+

pygame/mask-collision/pygame-mask-collision.py

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+import pygame
+
+NEXT = pygame.USEREVENT + 1
+
+playlist = [
+    "Muzyka/efect/Shotgun 12 gauge sPAs-12 semi automatic single shot distant.mpeg",
+    "Muzyka/efect/Shotgun blast shot_BLASTWAVEFX_31658.mp3",
+    'track_one.ogg',
+    'track_two.ogg',
+    'track_three.ogg',
+    'track_four.ogg',
+]
+
+tracks_number = len(playlist)
+current_track = 0
+
+pygame.init() # need it for event loop
+#screen = pygame.display.set_mode((800,600)) # it can be useful to stop program 
+
+pygame.mixer.init(frequency = 48000)
+
+# start first track
+pygame.mixer.music.load(playlist[current_track])
+pygame.mixer.music.play()
+
+# send event NEXT when tracks ends
+pygame.mixer.music.set_endevent(NEXT) 
+
+running = True
+while running:
+    
+    for event in pygame.event.get():
+        if event.type == pygame.QUIT:
+            running = False
+            
+        elif event.type == NEXT:
+            
+            # get next track (modulo number of tracks)
+            current_track = (current_track + 1) % tracks_number
+            
+            print("Play:", playlist[current_track])
+            
+            pygame.mixer.music.load(playlist[current_track])
+            pygame.mixer.music.play()
+
+            
+pygame.quit()
+