m

Author: ityard

yeke/README.md

@@ -12,6 +12,7 @@
 + [py-tank](https://github.com/JustDoPython/python-examples/tree/master/yeke/py-tank) ：用 Python 写个坦克大战
 + [py-scratch](https://github.com/JustDoPython/python-examples/tree/master/yeke/py-scratch) ：不到 50 行 Python 代码，做个刮刮卡
 + [py-xxl](https://github.com/JustDoPython/python-examples/tree/master/yeke/py-xxl) ：用 Python 写个消消乐小游戏
++ [py-sun](https://github.com/JustDoPython/python-examples/tree/master/yeke/py-sun) ：用 Python 动态模拟太阳系的运转
 
 ---
 

yeke/py-sun/__init__.py

@@ -0,0 +1,100 @@
+import sys
+import math
+import pygame
+from pygame.locals import *
+
+pygame.init()
+WHITE =(255, 255, 255)
+SILVER = (192, 192, 192)
+BLACK = (0, 0, 0)
+GREEN = (0, 255, 0)
+RED = (255, 0, 0)
+BLUE = (0, 0, 255)
+YELLOW = (255, 255, 0)
+SandyBrown = (244, 164, 96)
+PaleGodenrod = (238, 232, 170)
+PaleVioletRed = (219, 112, 147)
+Thistle = (216, 191, 216)
+size = width, height = 800, 600
+screen = pygame.display.set_mode(size)
+pygame.display.set_caption("太阳系")
+# 创建时钟(控制游戏循环频率)
+clock = pygame.time.Clock()
+# 定义三个空列表
+pos_v = pos_e = pos_mm = []
+# 地球、月球等行星转过的角度
+roll_v = roll_e = roll_m = 0
+roll_3 = roll_4 = roll_5 = roll_6 = roll_7 = roll_8 = 0
+# 太阳的位置（中心）
+position = size[0] // 2, size[1] // 2
+
+while True:
+    for event in pygame.event.get():
+        if event.type == QUIT:
+            sys.exit()
+            # 背景颜色为黑色
+    screen.fill(BLACK)
+    # 画太阳
+    pygame.draw.circle(screen, YELLOW, position, 60, 0)
+    # 画地球
+    roll_e += 0.01  # 假设地球每帧公转 0.01 pi
+    pos_e_x = int(size[0] // 2 + size[1] // 6 * math.sin(roll_e))
+    pos_e_y = int(size[1] // 2 + size[1] // 6 * math.cos(roll_e))
+    pygame.draw.circle(screen, BLUE, (pos_e_x, pos_e_y), 15, 0)
+    # 地球的轨迹线
+    pos_e.append((pos_e_x, pos_e_y))
+    if len(pos_e) > 255:
+        pos_e.pop(0)
+    for i in range(len(pos_e)):
+        pygame.draw.circle(screen, SILVER, pos_e[i], 1, 0)
+    # 画月球
+    roll_m += 0.1
+    pos_m_x = int(pos_e_x + size[1] // 20 * math.sin(roll_m))
+    pos_m_y = int(pos_e_y + size[1] // 20 * math.cos(roll_m))
+    pygame.draw.circle(screen, WHITE, (pos_m_x, pos_m_y), 8, 0)
+    # 月球的轨迹线
+    pos_mm.append((pos_m_x, pos_m_y))
+    if len(pos_mm) > 255:
+        pos_mm.pop(0)
+    for i in range(len(pos_mm)):
+        pygame.draw.circle(screen, SILVER, pos_mm[i], 1, 0)
+    # 画金星
+    roll_v += 0.015
+    pos_v_x = int(size[0] // 2 + size[1] // 3 * math.sin(roll_v))
+    pos_v_y = int(size[1] // 2 + size[1] // 3 * math.cos(roll_v))
+    pygame.draw.circle(screen, RED, (pos_v_x, pos_v_y), 20, 0)
+    # 金星的轨迹线
+    pos_v.append((pos_v_x, pos_v_y))
+    if len(pos_v) > 255:
+        pos_v.pop(0)
+    for i in range(len(pos_v)):
+        pygame.draw.circle(screen, SILVER, pos_v[i], 1, 0)
+    # 其他几个行星
+    roll_3 += 0.03
+    pos_3_x = int(size[0] // 2 + size[1] // 3.5 * math.sin(roll_3))
+    pos_3_y = int(size[1] // 2 + size[1] // 3.5 * math.cos(roll_3))
+    pygame.draw.circle(screen, GREEN, (pos_3_x, pos_3_y), 20, 0)
+    roll_4 += 0.04
+    pos_4_x = int(size[0] // 2 + size[1] // 4 * math.sin(roll_4))
+    pos_4_y = int(size[1] // 2 + size[1] // 4 * math.cos(roll_4))
+    pygame.draw.circle(screen, SandyBrown, (pos_4_x, pos_4_y), 20, 0)
+    roll_5 += 0.05
+    pos_5_x = int(size[0] // 2 + size[1] // 5 * math.sin(roll_5))
+    pos_5_y = int(size[1] // 2 + size[1] // 5 * math.cos(roll_5))
+    pygame.draw.circle(screen, PaleGodenrod, (pos_5_x, pos_5_y), 20, 0)
+    roll_6 += 0.06
+    pos_6_x = int(size[0] // 2 + size[1] // 2.5 * math.sin(roll_6))
+    pos_6_y = int(size[1] // 2 + size[1] // 2.5 * math.cos(roll_6))
+    pygame.draw.circle(screen, PaleVioletRed, (pos_6_x, pos_6_y), 20, 0)
+    roll_7 += 0.07
+    pos_7_x = int(size[0] // 2 + size[1] // 4.5 * math.sin(roll_7))
+    pos_7_y = int(size[1] // 2 + size[1] // 4.5 * math.cos(roll_7))
+    pygame.draw.circle(screen, Thistle, (pos_7_x, pos_7_y), 20, 0)
+    roll_8 += 0.08
+    pos_8_x = int(size[0] // 2 + size[1] // 5.5 * math.sin(roll_8))
+    pos_8_y = int(size[1] // 2 + size[1] // 5.5 * math.cos(roll_8))
+    pygame.draw.circle(screen, WHITE, (pos_8_x, pos_8_y), 20, 0)
+    # 刷新
+    pygame.display.flip()
+    # 数值越大刷新越快，小球运动越快
+    clock.tick(40)