Python超人-宇宙模拟器

common/func.py

@@ -15,6 +15,24 @@ import math
 import time
 
 
+def au_to_ly(au):
+    """
+    将天文单位转换为光年
+    :param au: 天文单位
+    :return: 光年
+    """
+    return au / 63241.0770847
+
+
+def ly_to_au(ly):
+    """
+    将光年转换为天文单位
+    :param ly: 光年
+    :return: 天文单位
+    """
+    return ly * 63241.0770847
+
+
 def get_dominant_colors(infile, resize=(20, 20)):
     """
     获取图片的主要颜色
@@ -106,7 +124,7 @@ def wait_for(secs):
         wait -= 1
 
 
-def calculate_acceleration(current_v , distance, t):
+def calculate_acceleration(current_v, distance, t):
     """
     计算加速度，使得当前物体到达目的距离需要的加速度
     @param current_v: 物体当前速度（km/s）
@@ -117,9 +135,10 @@ def calculate_acceleration(current_v , distance, t):
     current_v = current_v * 1000  # km/s -> m/s
     distance = distance * 1000  # km -> m
     acceleration = 2 * (distance - current_v * t) / (t ** 2)
-    acceleration = acceleration/1000  # m/s^2 -> km/s^2
+    acceleration = acceleration / 1000  # m/s^2 -> km/s^2
     return acceleration
 
+
 def calculate_distance(pos1, pos2=[0, 0, 0]):
     """
     计算两点间的距离

sim_scenes/solar_system/solar_system_reality_2.py

@@ -13,7 +13,7 @@ from bodies import Sun, Mercury, Venus, Earth, Mars, Asteroids, Jupiter, Saturn,
 from common.celestial_data_service import get_body_posvel, recalc_moon_position, calc_solar_acceleration, \
     set_solar_system_celestial_position, set_earth_rotation, get_reality_orbit_points
 from common.consts import SECONDS_PER_WEEK, SECONDS_PER_DAY, SECONDS_PER_HOUR, AU
-from sim_scenes.func import ursina_run, create_sphere_sky
+from sim_scenes.func import ursina_run, create_sphere_sky, create_text_panel
 from sim_scenes.universe_sim_scenes import UniverseSimScenes
 from simulators.func import ext_fun_for_method
 from simulators.ursina.entities.body_timer import TimeData
@@ -156,7 +156,24 @@ class SolarSystemRealitySim(UniverseSimScenes):
         delattr(self.earth.planet, "rotspeed")
 
         # 设置后，可以调整鼠标键盘的控制速度
-        application.time_scale = 1
+        application.time_scale = 5
+
+        self.text_panel = create_text_panel(font="fonts/DroidSansFallback.ttf", font_scale=1.3)
+        self.text_panel.parent.scale_y /= 6
+        self.text_panel.scale_y *= 6
+
+    def update_text_panel(self):
+        """
+        更新文字信息面板
+        @param d_sun:
+        @return:
+        """
+        from ursina import distance
+        d_sun = distance(self.sun.planet.position, camera.position)
+        d_sun = d_sun / UrsinaConfig.SCALE_FACTOR / AU
+        panel_text = "当前日距：%s AU" % "{:.2f}".format(d_sun)  # .rjust(6, "0")
+
+        self.text_panel.text = panel_text
 
     def on_timer_changed(self, time_data: TimeData):
         """
@@ -171,6 +188,7 @@ class SolarSystemRealitySim(UniverseSimScenes):
         set_earth_rotation(self.earth, dt)
         # 显示时钟
         # self.show_clock(dt)
+        self.update_text_panel()
 
     def bind_events(self):
         # 运行中，每时每刻都会触发 on_timer_changed
@@ -373,7 +391,8 @@ class SolarSystemRealitySim(UniverseSimScenes):
         UrsinaConfig.run_speed_factor = 0.01
         body.planet.origin_update = body.planet.update
         size_scale, scale_x = self.body_scale_dict[body]
-        scale_inc = (scale_x - scale_x/size_scale) / 200.0
+        scale_inc = (scale_x - scale_x / size_scale) / 200.0
+
         # scale_inc = (scale_x / size_scale) / 10.0
 
         def update_scale():