changes

Author: furas

pygame/math-bullet-to-target/README.md

@@ -0,0 +1,4 @@
+It calculate new position (after one frame/move) if you have bullet's position and speed, and target's position.
+
+If target doesn't change place or bullet doesn't change angle then you can calculate cx,cy only once.
+

pygame/math-bullet-to-target/main.py

@@ -0,0 +1,52 @@
+import math
+
+def move(x1, y1, x2, y2, speed):
+
+    # distance
+    dx = x2 - x1
+    dy = y2 - y1
+
+    # angle
+    angle = math.atan2(dx, dy)
+    #print(math.degrees(angle))
+
+    # 
+    cx = speed * math.sin(angle)
+    cy = speed * math.cos(angle)
+    #print(cx, cy)
+
+    # if distance is smaller then `cx/cy`
+    # then you have to stop in target.
+
+    if abs(cx) < abs(dx) or abs(cy) < abs(dy):
+        # move bullet to new position
+        x1 += cx
+        y1 += cy
+        in_target = False
+    else:
+        # move bullet to target
+        x1 = x2
+        y1 = y2
+        in_target = True
+
+    return x1, y1, in_target
+
+#--- 
+
+speed = 10
+
+# bullet position
+x1 = 10
+y1 = 0
+
+# taget possition
+x2 = -130
+y2 = 30
+
+print('x: {:6.02f} | y: {:6.02f}'.format(x1, y1))
+
+in_target = False
+
+while not in_target and :
+    x1, y1, in_target = move(x1, y1, x2, y2, speed)
+    print('x: {:6.02f} | y: {:6.02f}'.format(x1, y1))

pygame/waypoints-move/README.md

@@ -0,0 +1,5 @@
+
+Moving player using list with waypoints.
+
+Image: 
+![#1](images/waypoint-move.png?raw=true)   

pygame/waypoints-move/images/waypoint-move.png

@@ -0,0 +1,156 @@
+#!/usr/bin/env python3
+
+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 Player():
+    
+    def __init__(self, waypoints, loop=False):
+        
+        # create green circe 
+        r = 10
+        
+        self.image = pygame.Surface((2*r, 2*r)).convert_alpha()
+        self.rect = self.image.get_rect()
+
+        self.image.fill((0,0,0,0))
+        pygame.draw.circle(self.image, (0,255,0), (r, r), r)
+
+        # ---
+
+        self.loop = loop
+        
+        self.speed = 5
+
+        self.waypoints = waypoints
+        self.next_point = 0
+
+        # set current position
+        # I use Vector2 because it keeps position as float numbers 
+        # and it makes calcuations easier and more precise
+        self.current = pygame.math.Vector2(self.waypoints[0])
+        
+        # set position in rect to draw it
+        self.rect.center = self.current
+
+        # set end point if exists on list
+        self.target_index = 1
+        if self.target_index < len(self.waypoints) - 1:
+            self.target = pygame.math.Vector2(self.waypoints[self.target_index])
+            self.moving = True
+        else:
+            self.target = self.current
+            self.moving = False
+
+    def move(self):
+        
+        if self.moving:
+
+            # get distance to taget
+            distance = self.current.distance_to(self.target)
+            
+            # 
+            if distance > self.speed:
+                self.current = self.current + (self.target - self.current).normalize() * self.speed
+                self.rect.center = self.current
+            else:
+                # put player in tagert place, 
+                # and find new target on list with waypoints 
+                
+                self.current = self.target
+                self.rect.center = self.current
+                
+                # set next end point if exists on list
+                self.target_index += 1
+                if self.target_index < len(self.waypoints):
+                    self.target = pygame.math.Vector2(self.waypoints[self.target_index])
+                else:
+                    if self.loop:
+                        self.target_index = 0
+                    else:
+                        self.moving = False
+                
+        
+    def draw(self, surface):
+        surface.blit(self.image, self.rect)
+        
+# === MAIN === (lower_case names)
+
+# --- init ---
+
+pygame.init()
+
+screen = pygame.display.set_mode((SCREEN_WIDTH, SCREEN_HEIGHT))
+screen_rect = screen.get_rect()
+
+# --- objects ---
+
+start = pygame.math.Vector2(screen_rect.centerx, screen_rect.bottom)
+end = start
+length = 150
+
+waypoints = [(50, 50), (400, 150), (500, 50), (450, 350), (200, 200), (100, 350), (50, 50)]
+
+player = Player(waypoints, True)
+
+# --- 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
+
+        # --- objects events ---
+
+            # empty
+
+    # --- updates ---
+
+        # empty
+
+    player.move()
+    
+    # --- draws ---
+
+    screen.fill(BLACK)
+
+    for start, end in zip(waypoints, waypoints[1:]):
+        pygame.draw.line(screen, RED, start, end)
+
+    player.draw(screen)
+    
+    pygame.display.update()
+
+    # --- FPS ---
+
+    clock.tick(25)
+
+# --- the end ---
+
+pygame.quit()

pygame/waypoints-move/main.py

@@ -2,7 +2,7 @@
 
 from selenium import webdriver
 from selenium.webdriver.common.keys import Keys
-import pyperclip
+#import pyperclip
 
 driver = webdriver.Chrome()
 driver.get("http://www.iplsuperfanatic.com/")
@@ -13,7 +13,7 @@
 # it works with <body> but not have to with other tags.
 element.send_keys(Keys.CONTROL, "a")
 element.send_keys(Keys.CONTROL, "c")
-print(pyperclip.paste()) # text from Clipboard
+#print(pyperclip.paste()) # text from Clipboard
 
 # it gets all text in HTML 
 # ie. country names in <select>

selenium/CONTROL_A__CONTROL_C/main.py

@@ -0,0 +1,17 @@
+#!/usr/bin/env python3
+
+from selenium import webdriver
+
+driver = webdriver.Chrome()
+driver.get("http://quotes.toscrape.com/js/")
+
+elements = driver.find_elements_by_xpath('//div[@class="quote"]')
+
+for item in elements:
+    print('text:', item.find_element_by_class_name('text').text[:20] + ' ...')
+    print('author:', item.find_element_by_class_name('text').text)
+    
+    all_tags = item.find_elements_by_class_name('tag')
+    print('tags:', ', '.join(tag.text for tag in all_tags))
+
+    print('-----')