太阳系三体模拟器

common/consts.py

@@ -37,3 +37,7 @@ SECONDS_PER_WEEK = SECONDS_PER_DAY * 7
 一月多少秒（按照30天算）
 """
 SECONDS_PER_MONTH = SECONDS_PER_DAY * 30
+"""
+一年多少秒（按照365天算）
+"""
+SECONDS_PER_YEAR = SECONDS_PER_DAY * 365

scenes/earth_moon.py

@@ -7,7 +7,7 @@
 # python_version  :3.8
 # ==============================================================================
 from bodies import Sun, Earth, Moon
-from common.consts import SECONDS_PER_HOUR, SECONDS_PER_HALF_DAY, SECONDS_PER_DAY, SECONDS_PER_WEEK
+from common.consts import SECONDS_PER_HOUR, SECONDS_PER_HALF_DAY, SECONDS_PER_DAY, SECONDS_PER_WEEK, SECONDS_PER_MONTH
 from scenes.func import mayavi_run, ursina_run
 from bodies.body import AU
 
@@ -16,17 +16,15 @@ if __name__ == '__main__':
     地球、月球
     """
     # 地球的Y方向初始速度
-    EARTH_INIT_VELOCITY = 0  # 200m/s
-    sun = Sun(init_position=[0, AU, 0], init_velocity=[0, 0, 0], size_scale=1e1)
-    sun.ignore_mass = True
+    EARTH_INIT_VELOCITY = -0  # 20m/s
     bodies = [
         # sun,
         Earth(init_position=[0, 0, 0],
-              init_velocity=[0, EARTH_INIT_VELOCITY, 0], size_scale=1e1),  # 地球放大 10 倍，距离保持不变
+              init_velocity=[0, EARTH_INIT_VELOCITY, 0], size_scale=1),  # 地球放大 10 倍，距离保持不变
         Moon(init_position=[363104, 0, 0],  # 距地距离约: 363104 至 405696 km
-             init_velocity=[0, EARTH_INIT_VELOCITY + 1.023, 0], size_scale=1e1)  # 月球放大 10 倍，距离保持不变
+             init_velocity=[0, EARTH_INIT_VELOCITY + 1.023, 0], size_scale=1)  # 月球放大 10 倍，距离保持不变
     ]
     # mayavi_run(bodies, SECONDS_PER_HALF_DAY / 2, view_azimuth=-45)
 
     # 使用 ursina 查看的运行效果
-    ursina_run(bodies, SECONDS_PER_DAY, position=(0, 0, 0))
+    ursina_run(bodies, SECONDS_PER_MONTH, position=(0, 0, 0))

scenes/solar_system_2.py

@@ -7,7 +7,7 @@
 # python_version  :3.8
 # ==============================================================================
 from bodies import Sun, Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto
-from common.consts import SECONDS_PER_WEEK, SECONDS_PER_DAY
+from common.consts import SECONDS_PER_WEEK, SECONDS_PER_DAY, SECONDS_PER_MONTH, SECONDS_PER_YEAR
 from scenes.func import mayavi_run, ursina_run
 
 if __name__ == '__main__':
@@ -38,4 +38,4 @@ if __name__ == '__main__':
 
     # mayavi_run(bodies, SECONDS_PER_WEEK, view_azimuth=-45, view_distance=3e9, view_focalpoint=[5e2, 5e2, 5e2])
 
-    ursina_run(bodies, SECONDS_PER_DAY, position=(0, 0, 0))
\ No newline at end of file
+    ursina_run(bodies, SECONDS_PER_YEAR, position=(0, 0, 0))
\ No newline at end of file

scenes/sun_earth_moon.py

+# -*- coding:utf-8 -*-
+# title           :地月场景模拟
+# description     :地月场景模拟
+# author          :Python超人
+# date            :2023-02-11
+# link            :https://gitcode.net/pythoncr/
+# python_version  :3.8
+# ==============================================================================
+from bodies import Sun, Earth, Moon
+from common.consts import SECONDS_PER_HOUR, SECONDS_PER_HALF_DAY, SECONDS_PER_DAY, SECONDS_PER_WEEK
+from scenes.func import mayavi_run, ursina_run
+from bodies.body import AU
+
+if __name__ == '__main__':
+    """
+    地球、月球
+    """
+    # 地球的Y方向初始速度
+    EARTH_INIT_VELOCITY = 29.79  # 200m/s
+    sun = Sun(init_position=[0, AU, 0], init_velocity=[0, 0, 0], size_scale=1e1)
+    # sun.ignore_mass = True
+    bodies = [
+        sun,
+        Earth(init_position=[0, 0, 0],
+              init_velocity=[0, EARTH_INIT_VELOCITY, 0], size_scale=1e1),  # 地球放大 10 倍，距离保持不变
+        Moon(init_position=[363104, 0, 0],  # 距地距离约: 363104 至 405696 km
+             init_velocity=[0, EARTH_INIT_VELOCITY + 1.023, 0], size_scale=1e1)  # 月球放大 10 倍，距离保持不变
+    ]
+    # mayavi_run(bodies, SECONDS_PER_HALF_DAY / 2, view_azimuth=-45)
+
+    # 使用 ursina 查看的运行效果
+    ursina_run(bodies, SECONDS_PER_DAY, position=(0, 0, 0))

simulators/ursina_simulator.py

@@ -26,7 +26,7 @@ class WorldGrid(Entity):  # Entity # 定义构造方法
     def __init__(self):
         super().__init__()
         s = 100
-        grid = Entity(model=Grid(s, s), scale=s * 20, color=color.rgba(255, 255, 255, 20), rotation_x=90,
+        grid = Entity(model=Grid(s, s), scale=s*20, color=color.rgba(255, 255, 255, 20), rotation_x=90,
                       position=(0, -80, 0))
         # 坐标轴
         # vertsx = ((0, 0, 0), (10, 0, 0))
@@ -127,9 +127,11 @@ class UrsinaSimulator(Simulator):
         # self.sun = "sun"
         lights = []
         # 创建多个新的 Entity 对象，作为光晕的容器
-        for i in range(5):
+        for i in range(10):
+            # glow_entity = Entity(parent=entity, model='sphere', color=color.rgba(1.0, 0.6, 0.2, 1),
+            #                      scale=math.pow(1.03, i), alpha=0.2)
             glow_entity = Entity(parent=entity, model='sphere', color=color.rgba(1.0, 0.6, 0.2, 1),
-                                 scale=math.pow(1.03, i), alpha=0.2)
+                                 scale=math.pow(1.03, i), alpha=0.1)
 
             lights.append(glow_entity)
         # 创建 PointLight 对象，作为恒星的灯光源
@@ -159,7 +161,8 @@ class UrsinaSimulator(Simulator):
             cosmic_bg = kwargs["cosmic_bg"]
             if cosmic_bg is None:
                 # cosmic_bg = '../textures/cosmic1.png'
-                cosmic_bg = '../textures/cosmic2.jpg'
+                # cosmic_bg = '../textures/cosmic2.jpg'
+                cosmic_bg = '../textures/cosmic3.jpg'
             import os
             if cosmic_bg is not None and os.path.exists(cosmic_bg):
                 self.cosmic_background(cosmic_bg)

simulators/views/ursina_view.py

@@ -22,7 +22,10 @@ from simulators.views.body_view import BodyView
 import numpy as np
 import math
 
-SCALE_FACTOR = 5e-6
+SCALE_FACTOR = 5e-7
+# 旋转因子为1，则为正常的转速
+ROTATION_SPEED_FACTOR = 1.0
+# ROTATION_SPEED_FACTOR = 0.1
 
 
 class UrsinaPlayer(FirstPersonController):
@@ -108,12 +111,8 @@ class Planet(Entity):
             # 旋转速度和大小成反比（未使用真实数据）
             # self.rotspeed = 30000 / self.body_view.raduis  # random.uniform(1.0, 2.0)
         else:
-            # 4.60e-6 是通过月球保持一面面对地球，调整得到
-            # self.rotspeed = self.rotation_speed * dt * 4.60e-6
-            # (self.rotation_speed * dt * 4.60e-6),(self.rotation_speed * (dt / 3600))/60
-
-            self.rotspeed = self.rotation_speed * (dt / 3600) / 2.4  # / 60 / 24
-            # self.rotspeed = self.rotation_speed * (dt / 3600) / 3.65e7
+            # 是通过月球保持一面面对地球，调整得到
+            self.rotspeed = self.rotation_speed * (dt / 3600) / 2.4 * ROTATION_SPEED_FACTOR # / 60 / 24
             # rotation_speed 度/小时  dt 秒 = (dt / 3600)小时
 
         self.rotation_y -= self.rotspeed