太阳系三体模拟器

bodies/body.py

@@ -307,7 +307,7 @@ class Body(metaclass=ABCMeta):
 
     def __repr__(self):
         return '<%s(%s)> m=%.3e(kg), r|d=%.3e|%.3e(km), v=%.3e(km³), d=%.3e(kg/m³), p=[%.3e,%.3e,%.3e](km), v=%s(km/s)' % \
-               (self.name,self.__class__.__name__, self.mass, self.raduis, self.diameter, self.volume, self.density,
+               (self.name, self.__class__.__name__, self.mass, self.raduis, self.diameter, self.volume, self.density,
                 self.position[0], self.position[1], self.position[2], self.velocity)
 
     def ignore_gravity(self, body):
@@ -371,12 +371,15 @@ class Body(metaclass=ABCMeta):
                 except Exception as e:
                     err_msg = f"{json_file} 格式错误：" + str(e)
                     raise Exception(err_msg)
+                is_fixed_star = False
                 if "is_fixed_star" in body_data:
                     if body_data["is_fixed_star"]:
+                        is_fixed_star = True
+                if is_fixed_star:
                     body_data.pop("is_fixed_star")
                     body = FixedStar(**body_data)
                 else:
-                    body = FixedStar(**body_data)
+                    body = Body(**body_data)
                 bodies.append(body)
             if "params" in json_data:
                 params = json_data["params"]

data/gravity_slingshot.json

@@ -59,6 +59,8 @@
       0,
       149597870.7,
       -448793612.09999996
-    ]
+    ],
+    "show_trail": true,
+    "show_name": false
   }
 }
\ No newline at end of file

data/sun_earth.json

@@ -59,6 +59,8 @@
       0,
       149597870.7,
       -448793612.09999996
-    ]
+    ],
+    "show_trail": true,
+    "show_name": false
   }
 }
\ No newline at end of file

data/tri_bodies_sim_perfect_01.json

@@ -102,6 +102,8 @@
       0,
       149597870.7,
       -1495978707.0
-    ]
+    ],
+    "show_trail": true,
+    "show_name": false
   }
 }
\ No newline at end of file

data/tri_bodies_sim_perfect_02.json

@@ -79,6 +79,8 @@
       0,
       149597870.7,
       -1495978707.0
-    ]
+    ],
+    "show_trail": true,
+    "show_name": false
   }
 }
\ No newline at end of file

data/tri_bodies_sim_perfect_03.json

@@ -79,6 +79,8 @@
       0,
       149597870.7,
       -1495978707.0
-    ]
+    ],
+    "show_trail": true,
+    "show_name": false
   }
 }
\ No newline at end of file

scenes/ursina_json_sim.py

@@ -29,7 +29,7 @@ if __name__ == '__main__':
 
     dt = params["dt"] if "dt" in params else SECONDS_PER_YEAR
     position = params["position"] if "position" in params else (0, 0, 0)
-    show_trail = params["show_trail"] if "show_trail" in params else True
+    show_trail = params["show_trail"] if "show_trail" in params else False
 
     # 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