太阳系三体模拟器

simulators/ursina/ui_component.py

@@ -16,12 +16,12 @@ from simulators.ursina.ursina_config import UrsinaConfig
 
 
 class UiSlider(Slider):
-    def __init__(self, text, min=0.01, max=3, default=1):
+    def __init__(self, text, min=0.01, max=3, step=.01, default=1):
         # Text.default_font = 'msyhl.ttc'  # 'simsun.ttc'
         super().__init__(text=text,
                          height=Text.size,
                          y=-.6,
-                         step=.01,
+                         step=step,
                          min=min,
                          max=max,
                          default=default,
@@ -35,10 +35,9 @@ class UiSlider(Slider):
         # self.height *= 8/10
 
 
-
 class SwithButton(ButtonGroup):
     def __init__(self, options, default, tooltips=None):
-        super().__init__(options, min_selection=1,default=default,
+        super().__init__(options, min_selection=1, default=default,
                          selected_color=color.rgba(0.1, 0.6, 0.1, 1.0), ignore_paused=True,
                          color=color.rgba(0.0, 0.0, 0.0, 0.5))
         # self.label.scale = 0.8

simulators/ursina/ursina_config.py

@@ -11,15 +11,15 @@
 
 class UrsinaConfig:
     # 常量定义
-    # 天体缩放的因子（不能太大，否则无法容得下大数量级的天体）
-    SCALE_FACTOR = 5e-10
+    # 天体缩放的因子（不能太大，否则无法容得下大数量级的天体）调整 5e-7 最佳
+    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 = 0.01
 
     # 中文字体（微软雅黑）
     CN_FONT = "msyhl.ttc"  # 'simsun.ttc' 仿宋体
-    CN_FONT = 'simsun.ttc'  #  仿宋体
+    # CN_FONT = 'simsun.ttc'  #  仿宋体
 
     # 速度的倍数
     __run_speed_factor = 1.0
@@ -37,6 +37,8 @@ class UrsinaConfig:
     trail_length = 200
     # 默认秒数（0表示默认）
     seconds_per = 0
+    # # 控制摄像机动作速度（天体越大，速度越快，天体越小，速度越慢）
+    # control_camera_speed = 1
 
     __body_size_factor = 1.0
 

simulators/ursina/ursina_ui.py

@@ -27,12 +27,12 @@ class UrsinaUI:
         self.no_trail_button_text = "○ "
         self.trail_button_text = "○--"
 
-        application.time_scale = 0.5
+        # application.time_scale = 0.5
         self.slider_body_spin_factor = UiSlider(text='自转速度', min=0.01, max=30, default=1)
         self.slider_body_size_factor = UiSlider(text='天体缩放', min=0.1, max=100, default=1)
         self.slider_run_speed_factor = UiSlider(text="运行速度", min=0.01, max=80, default=1)
-        self.slider_control_speed_factor = UiSlider(text="控制速度", min=0.01, max=30, default=application.time_scale)
-        self.slider_trail_length = UiSlider(text="拖尾长度", min=30, max=500, default=UrsinaConfig.trail_length)
+        self.slider_control_speed_factor = UiSlider(text="控制速度", min=0.01, max=50, default=application.time_scale)
+        self.slider_trail_length = UiSlider(text="拖尾长度", min=30, max=500, step=10, default=UrsinaConfig.trail_length)
 
         self.slider_body_size_factor.on_value_changed = self.on_slider_body_size_changed
         self.slider_body_spin_factor.on_value_changed = self.on_slider_body_spin_changed

simulators/ursina_simulator.py

@@ -8,7 +8,7 @@
 # ==============================================================================
 # pip install -i http://pypi.douban.com/simple/ --trusted-host=pypi.douban.com ursina
 from ursina import Ursina, window, Entity, Grid, Mesh, camera, Text, application, color, mouse, Vec2, Vec3, \
-    load_texture, held_keys
+    load_texture, held_keys, distance
 from ursina.prefabs.first_person_controller import FirstPersonController
 
 from simulators.ursina.ursina_event import UrsinaEvent
@@ -57,9 +57,25 @@ class UrsinaSimulator(Simulator):
             self.ursina_views.append(view)
             # planets.append(newPlanet)
             # x += cp[i] * 10
-
+        self.adj_application_time_scale()
         UrsinaEvent.on_searching_bodies_subscription(type(self).__name__, self.on_searching_bodies)
 
+    def adj_application_time_scale(self):
+        max_distance = 0
+        for b1 in self.body_views:
+            for b2 in self.body_views:
+                if b1 is b2:
+                    continue
+            d = distance(b1.planet, b2.planet)
+            if d > max_distance:
+                max_distance = d
+
+        # UrsinaConfig.control_camera_speed = round(max_distance * 10, 2)
+        time_scale = round(pow(max_distance, 1 / 3), 2)
+        if time_scale < 0.01:
+            time_scale = 0.01
+        application.time_scale = time_scale
+
     def on_searching_bodies(self, **kwargs):
         views = []
         for view in self.body_views: