Python超人-宇宙模拟器

sim_scenes/func.py

@@ -117,6 +117,7 @@ def ursina_run(bodies,
                show_exit_button=True,
                grid_position=None,
                grid_scale=None,
+               gravity_works=True,
                show_trail=False,
                show_name=False,
                show_timer=False,
@@ -135,6 +136,7 @@ def ursina_run(bodies,
     @param show_camera_info: 是否显示摄像机信息面板
     @param show_control_info: 是否显示控制信息面板
     @param show_exit_button: 是否显示模拟器关闭按钮
+    @param gravity_works: 万有引力是否启用
     @param show_trail: 是否显示拖尾
     @param show_name: 是否显示天体名称
     @param show_timer: 是否显示计时器
@@ -171,7 +173,7 @@ def ursina_run(bodies,
     def callback_update():
         UrsinaEvent.on_application_run()
         for ursina_view in simulator.ursina_views:
-            simulator.check_and_evolve()
+            simulator.check_and_evolve(gravity_works)
             if ursina_view.appeared:
                 ursina_view.update()
 

sim_scenes/solar_system/solar_system_reality.py

+# -*- coding:utf-8 -*-
+# title           :模拟太阳系给天体真实时间和位置
+# description     :模拟太阳系给天体真实时间和位置
+# author          :Python超人
+# date            :2023-07-23
+# link            :https://gitcode.net/pythoncr/
+# python_version  :3.8
+# ==============================================================================
+import numpy as np
+
+from bodies import Sun, Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto, Moon, Asteroids
+from common.consts import SECONDS_PER_WEEK, SECONDS_PER_DAY, SECONDS_PER_YEAR, AU
+from sim_scenes.func import mayavi_run, ursina_run
+from simulators.ursina.entities.body_timer import TimeData
+from simulators.ursina.ui.control_ui import ControlUI
+from simulators.ursina.ursina_event import UrsinaEvent
+from astropy.coordinates import get_body_barycentric
+from astropy.time import Time
+
+
+def get_bodies_positions(planet_names="sun,mercury,venus,earth,moon,mars,jupiter,saturn,uranus,neptune", time=None):
+    if time is None:
+        time = Time.now()
+    planets = planet_names.split(",")
+    positions = {}
+    for planet in planets:
+        try:
+            position = get_body_barycentric(planet, time)
+            positions[planet] = position
+            print(planet, position)
+        except Exception as e:
+            print(planet, str(e))
+    return positions
+
+
+def get_bodies_names(bodies):
+    names = ""
+    for body in bodies:
+        names += body.__class__.__name__ + ","
+    return names[0:-1]
+
+
+current_time = Time.now()
+
+if __name__ == '__main__':
+    # 八大行星：木星(♃)、土星(♄)、天王星(♅)、海王星(♆)、地球(⊕)、金星(♀)、火星(♂)、水星(☿)
+    # 排列顺序
+    # 1、体积：(以地球为1)木星 ：土星 ：天王星 ：海王星 ：地球 ：金星 ：火星 ：水星 = 1330：745：65：60：1：0.86：0.15：0.056
+    # 2、质量：(以地球为1)木星 ：土星 ：天王星 ：海王星 ：地球 ：金星 ：火星 ：水星 = 318：95：14.53：17.15：1：0.8：0.11：0.0553
+    # 3、离太阳从近到远的顺序：水星、金星、地球、火星、木星、土星、天王星、海王星
+    #  =====================================================================
+    #  以下展示的效果为太阳系真实的距离
+    #  由于宇宙空间尺度非常大，如果按照实际的天体大小，则无法看到天体，因此需要对天体的尺寸进行放大
+    sun = Sun(name="太阳", size_scale=0.4e2)  # 太阳放大 80 倍，距离保持不变
+    bodies = [
+        sun,
+        Mercury(name="水星", size_scale=3e3),  # 水星
+        Venus(name="金星", size_scale=3e3),  # 金星
+        Earth(name="地球", size_scale=3e3),  # 地球
+        Moon(name="月球", size_scale=3e3),  # 月球
+        Mars(name="火星", size_scale=3e3),  # 火星
+        Jupiter(name="木星", size_scale=6e2),  # 木星
+        Saturn(name="土星", size_scale=6e2),  # 土星
+        Uranus(name="天王星", size_scale=10e2),  # 天王星
+        Neptune(name="海王星", size_scale=10e2),  # 海王星
+    ]
+    # pip install -i http://pypi.douban.com/simple/ --trusted-host=pypi.douban.com de423
+    names = get_bodies_names(bodies)
+
+
+    def get_body_position(body, positions):
+        position = positions.get(body.__class__.__name__, None)
+        if position is None:
+            return [0, 0, 0]
+
+        # return [position.x.value * AU, position.y.value * AU, position.z.value * AU]
+        return [position.x.value * AU, position.z.value * AU, position.y.value * AU]
+
+
+    def on_ready():
+        # 运行前触发
+        pass
+
+
+    def on_timer_changed(time_data: TimeData):
+        t = current_time + time_data.total_days
+        positions = get_bodies_positions(names, t)
+        for body in bodies:
+            position = get_body_position(body, positions)
+            body.position = np.array(position)
+
+        dt = time_data.get_datetime(str(current_time))
+        # print(time_data.get_datetime(str(current_time)))
+        ControlUI.current_ui.show_message(dt.strftime('%Y-%m-%d %H:%M:%S'), font="simsun.ttc", close_time=-1)
+
+
+    # 运行中，每时每刻都会触发 on_timer_changed
+    UrsinaEvent.on_timer_changed_subscription(on_timer_changed)
+    # 运行前会触发 on_ready
+    UrsinaEvent.on_ready_subscription(on_ready)
+
+    # 使用 ursina 查看的运行效果
+    # 常用快捷键： P：运行和暂停  O：重新开始  I：显示天体轨迹
+    # position = 左-右+、上+下-、前+后-
+    ursina_run(bodies, SECONDS_PER_WEEK,
+               position=(0, 2 * AU, -11 * AU),
+               gravity_works=False,  # 关闭万有引力的计算
+               show_grid=False,
+               show_timer=True)

simulators/simulator.py

@@ -35,13 +35,17 @@ class Simulator(metaclass=ABCMeta):
             view = viewer_type(body, self.bodies_sys)
             self.body_views.append(view)
 
-    def evolve(self, dt: int):
+    def evolve(self, dt: int, gravity_works=True):
         """
         单位：秒，按时间差进行演变，值越小越精确，但演变速度会慢。
+
         @param dt: 时间差（秒）
+        @param gravity_works: 万有引力是否起作用
         @return:
         """
-        self.bodies_sys.evolve(dt)
+        if gravity_works:
+            self.bodies_sys.evolve(dt)
+
         for idx, view in enumerate(self.body_views):
             body = self.bodies_sys.bodies[idx]
             body.dt = dt

simulators/ursina/entities/body_timer.py

@@ -59,6 +59,17 @@ class TimeData:
             else:
                 self.time_text = f'{self.hours:02d}:{self.minutes:02d}:{self.seconds:02d}'
 
+
+    def get_datetime(self, init_datetime):
+        import datetime
+        # UTC_format = "%Y-%m-%dT%H:%M:%S.%fZ"
+        UTC = datetime.datetime.strptime(init_datetime + "Z", "%Y-%m-%d %H:%M:%S.%fZ")
+        # BJS_format = "%Y-%m-%d %H:%M:%S"
+        BJS = UTC + datetime.timedelta(hours=8+self.total_hours)
+        # BJS = BJS.strftime(BJS_format)
+        # dt = datetime(init_datetime)
+        return BJS
+
     @property
     def total_minutes(self):
         return self.total_seconds / 60

simulators/ursina/ui/ui_panel.py

@@ -63,17 +63,22 @@ class UiPanel(WindowPanel):
         """
         pass
 
-    def show_message(self, message, close_time=3):
+    def show_message(self, message, font=None, close_time=3):
         """
         显示消息框
         @param message: 消息内容
+        @param font: 字体
         @param close_time: 定义显示消息框关闭时间
         @return:
         """
         if hasattr(self, "last_message_box"):
             destroy(self.last_message_box)
+        if font is None:
+            font = UrsinaConfig.CN_FONT
+        # else:
+        #     font = None
         # 创建消息框
-        message_box = Text(text=message, font=UrsinaConfig.CN_FONT, background=True, origin=(0, 0), y=.25)
+        message_box = Text(text=message, font=font, background=True, origin=(0, 0), y=.25)
 
         self.last_message_box = message_box
 

simulators/ursina_simulator.py

@@ -210,7 +210,7 @@ class UrsinaSimulator(Simulator):
             self.last_time = now
         return is_expired
 
-    def check_and_evolve(self):
+    def check_and_evolve(self, gravity_works=True):
         if self.check_interval_expired():
             # 获取配置中的运行速度的因子
             run_speed_factor = float(UrsinaConfig.run_speed_factor)
@@ -227,7 +227,7 @@ class UrsinaSimulator(Simulator):
             evolve_args = {"evolve_dt": evolve_dt}
             UrsinaEvent.on_before_evolving(evolve_args)
             # if evolve_args["evolve_dt"] > 0:
-            super().evolve(evolve_args["evolve_dt"])
+            super().evolve(evolve_args["evolve_dt"], gravity_works=gravity_works)
 
             if self.show_timer or self.timer_enabled:
                 timer = BodyTimer()