更改了坐标[x, y, z]->[-y, z, x]，备份，后面将删除注释和清理代码

bodies/asteroid.py

@@ -27,8 +27,10 @@ class Asteroid(Body):
     """
 
     def __init__(self, name="小行星", mass=4.1e10,
-                 init_position=[1.6 * AU, 0, 0],
-                 init_velocity=[0, 25.37, 0],
+                 # init_position=[1.6 * AU, 0, 0],
+                 # init_velocity=[0, 25.37, 0],
+                 init_position=[0, 0, 1.6 * AU],
+                 init_velocity=[-25.37, 0, 0],
                  texture="", size_scale=1.0, distance_scale=1.0):
         params = {
             "name": name,
@@ -43,6 +45,10 @@ class Asteroid(Body):
         }
         super().__init__(**params)
 
+    @property
+    def show_trail(self):
+        return False
+
     def ignore_gravity(self, body):
         """
         是否忽略引力

bodies/body.py

@@ -403,6 +403,9 @@ class Body(metaclass=ABCMeta):
                     body = FixedStar(**body_data)
                 else:
                     body = Body(**body_data)
+                # [x, y, z]->[-y, z, x]
+                # body.init_velocity = [-body.init_velocity[1],body.init_velocity[2],body.init_velocity[0]]
+                # body.init_position = [-body.init_position[1],body.init_position[2],body.init_position[0]]
                 bodies.append(body)
             if "params" in json_data:
                 params = json_data["params"]

bodies/earth.py

@@ -22,10 +22,11 @@ class Earth(Body):
     　天体质量: 5.97237✕10²⁴ kg
     　平均密度: 5507.85 kg/m³
     """
-
     def __init__(self, name="地球", mass=5.97237e24,rotate_angle=0,
-                 init_position=[1.12 * AU, 0, 0],
-                 init_velocity=[0, 29.79, 0],
+                 # init_position=[1.12 * AU, 0, 0],
+                 # init_velocity=[0, 29.79, 0],
+                 init_position=[0, 0, 1.12 * AU],
+                 init_velocity=[-29.79, 0, 0],
                  texture="earth1.jpg", size_scale=1.0, distance_scale=1.0,
                  rotation_speed=15, ignore_mass=False, trail_color=None, show_name=False):
         params = {

bodies/jupiter.py

@@ -22,10 +22,11 @@ class Jupiter(Body):
     　天体质量: 1.8982✕10²⁷ kg(317.8 M⊕)
     　平均密度: 1.326 g/cm³ -> -> 1.326✕10³ kg/m³
     """
-
     def __init__(self, name="木星", mass=1.8982e27,
-                 init_position=[5.2 * AU, 0, 0],
-                 init_velocity=[0, 13.06, 0],
+                 # init_position=[5.2 * AU, 0, 0],
+                 # init_velocity=[0, 13.06, 0],
+                 init_position=[0, 0, 5.2 * AU],
+                 init_velocity=[-13.06, 0, 0],
                  texture="jupiter1.jpg", size_scale=1.0, distance_scale=1.0,
                  rotation_speed=36.2537, ignore_mass=False, trail_color=None, show_name=False):
         params = {

bodies/mars.py

@@ -23,8 +23,10 @@ class Mars(Body):
     　平均密度: 3.9335 g/cm³ -> 3.9335✕10³ kg/m³
     """
     def __init__(self, name="火星", mass=6.4171e23,
-                 init_position=[1.5 * AU, 0, 0],
-                 init_velocity=[0, 24.13, 0],
+                 # init_position=[1.5 * AU, 0, 0],
+                 # init_velocity=[0, 24.13, 0],
+                 init_position=[0, 0, 1.5 * AU],
+                 init_velocity=[-24.13, 0, 0],
                  texture="mars.jpg", size_scale=1.0, distance_scale=1.0,
                  rotation_speed=14.6223, ignore_mass=False, trail_color=None, show_name=False):
         params = {

bodies/mercury.py

@@ -24,8 +24,10 @@ class Mercury(Body):
     """
 
     def __init__(self, name="水星", mass=3.3011e23,
-                 init_position=[0.4 * AU, 0, 0],
-                 init_velocity=[0, 47.87, 0],
+                 # init_position=[0.4 * AU, 0, 0],
+                 # init_velocity=[0, 47.87, 0],
+                 init_position=[0, 0, 0.4 * AU],
+                 init_velocity=[-47.87, 0, 0],
                  texture="mercury.jpg", size_scale=1.0, distance_scale=1.0,
                  rotation_speed=0.2558, ignore_mass=False, trail_color=None, show_name=False):
         params = {

bodies/moon.py

@@ -23,8 +23,10 @@ class Moon(Body):
     """
 
     def __init__(self, name="月球", mass=7.342e22,
-                 init_position=[363104 + 1.12 * AU, 0, 0],
-                 init_velocity=[0, 29.79 + 1.023, 0],
+                 # init_position=[363104 + 1.12 * AU, 0, 0],
+                 # init_velocity=[0, 29.79 + 1.023, 0],
+                 init_position=[0, 0, 363104 + 1.12 * AU],
+                 init_velocity=[-(29.79 + 1.023), 0, 0],
                  texture="moon.jpg", size_scale=1.0, distance_scale=1.0,
                  rotation_speed=0.5487, ignore_mass=False, trail_color=None, show_name=False):
         params = {

bodies/neptune.py

@@ -24,8 +24,10 @@ class Neptune(Body):
     """
 
     def __init__(self, name="海王星", mass=1.0241e26,
-                 init_position=[30 * AU, 0, 0],
-                 init_velocity=[0, 5.43, 0],
+                 # init_position=[30 * AU, 0, 0],
+                 # init_velocity=[0, 5.43, 0],
+                 init_position=[0, 0, 30 * AU],
+                 init_velocity=[-5.43, 0, 0],
                  texture="neptune.png", size_scale=1.0, distance_scale=1.0,
                  rotation_speed=22.3463, ignore_mass=False, trail_color=None, show_name=False):
         params = {

bodies/pluto.py

@@ -24,8 +24,10 @@ class Pluto(Body):
     """
 
     def __init__(self, name="冥王星", mass=1.303e22,
-                 init_position=[40 * AU, 0, 0],
-                 init_velocity=[0, 4.7, 0],
+                 # init_position=[40 * AU, 0, 0],
+                 # init_velocity=[0, 4.7, 0],
+                 init_position=[0, 0, 40 * AU],
+                 init_velocity=[-4.7, 0, 0],
                  texture="pluto.png", size_scale=1.0, distance_scale=1.0,
                  rotation_speed=-2.3474, ignore_mass=False, trail_color=None, show_name=False):
         params = {

bodies/saturn.py

@@ -24,8 +24,10 @@ class Saturn(Body):
     """
 
     def __init__(self, name="土星", mass=5.6834e26,
-                 init_position=[10 * AU, 0, 0],
-                 init_velocity=[0, 9.64, 0],
+                 # init_position=[10 * AU, 0, 0],
+                 # init_velocity=[0, 9.64, 0],
+                 init_position=[0, 0, 10 * AU],
+                 init_velocity=[-9.64, 0, 0],
                  texture="saturn.jpg", size_scale=1.0, distance_scale=1.0,
                  rotation_speed=33.7711, ignore_mass=False, trail_color=None, show_name=False):
         params = {

bodies/uranus.py

@@ -24,8 +24,10 @@ class Uranus(Body):
     """
 
     def __init__(self, name="天王星", mass=8.681e25,
-                 init_position=[19 * AU, 0, 0],
-                 init_velocity=[0, 6.81, 0],
+                 # init_position=[19 * AU, 0, 0],
+                 # init_velocity=[0, 6.81, 0],
+                 init_position=[0, 0, 19 * AU],
+                 init_velocity=[-6.81, 0, 0],
                  texture="uranus.png", size_scale=1.0, distance_scale=1.0,
                  rotation_speed=-20.8816, ignore_mass=False, trail_color=None, show_name=False):
         params = {

bodies/venus.py

@@ -24,8 +24,10 @@ class Venus(Body):
     """
 
     def __init__(self, name="金星", mass=4.8675e24,
-                 init_position=[0.72 * AU, 0, 0],
-                 init_velocity=[0, 35, 0],
+                 # init_position=[0.72 * AU, 0, 0],
+                 # init_velocity=[0, 35, 0],
+                 init_position=[0, 0, 0.72 * AU],
+                 init_velocity=[-35, 0, 0],
                  texture="venus.jpg", size_scale=1.0, distance_scale=1.0,
                  rotation_speed=-0.0617, ignore_mass=False, trail_color=None, show_name=False):
         params = {

common/func.py

@@ -64,13 +64,13 @@ def get_positions_velocitys(angles, velocity=1, radius=1, radius_offset=None, ve
         velocity = velocity + np.random.rand(len(angles)) * velocity_offset
 
     pxs = radius * np.cos(angles)
-    pys = radius * np.sin(angles)
+    pzs = radius * np.sin(angles)
 
-    vys = velocity * np.cos(angles)
+    vzs = velocity * np.cos(angles)
     vxs = velocity * np.sin(angles)
 
-    # return pxs, pys, fxs, fys
-    return np.round(pxs, 2), np.round(pys, 2), -np.round(vxs, 2), np.round(vys, 2)
+    # return pxs, pzs, vxs, vzs
+    return np.round(pxs, 2), np.round(pzs, 2), -np.round(vxs, 2), np.round(vzs, 2)
 
 
 def find_file(file_path, default_val=None, find_deep=5):

data/gravity_slingshot.json

@@ -4,12 +4,12 @@
       "name": "太阳",
       "mass": 1.9891e+30,
       "init_position": [
-        0.0,
+        -0.0,
         0.0,
         0.0
       ],
       "init_velocity": [
-        0.0,
+        -0.0,
         0.0,
         0.0
       ],
@@ -35,14 +35,14 @@
       "name": "地球",
       "mass": 5.97237e+24,
       "init_position": [
+        448793600.0,
         0.0,
-        -448793600.0,
         0.0
       ],
       "init_velocity": [
-        0.0,
-        38.0,
-        -1.0
+        -38.0,
+        -1.0,
+        0.0
       ],
       "density": 5507.85,
       "color": [

data/sun_earth.json

@@ -4,12 +4,12 @@
       "name": "太阳",
       "mass": 1.9891e+30,
       "init_position": [
-        0.0,
+        -0.0,
         0.0,
         0.0
       ],
       "init_velocity": [
-        0.0,
+        -0.0,
         0.0,
         0.0
       ],
@@ -35,13 +35,13 @@
       "name": "地球",
       "mass": 5.97237e+24,
       "init_position": [
-        167549616.0,
+        -0.0,
         0.0,
-        0.0
+        167549616.0
       ],
       "init_velocity": [
+        -29.790000915527344,
         0.0,
-        29.790000915527344,
         0.0
       ],
       "density": 5507.85,

data/sun_earth_moon.json

@@ -4,12 +4,12 @@
       "name": "太阳",
       "mass": 1.9891e+30,
       "init_position": [
-        149597872.0,
+        -0.0,
         0.0,
-        0.0
+        149597872.0
       ],
       "init_velocity": [
-        0.0,
+        -0.0,
         0.0,
         0.0
       ],
@@ -24,18 +24,23 @@
       "distance_scale": 1.0,
       "rotation_speed": 0.613,
       "ignore_mass": true,
-      "is_fixed_star": true
+      "is_fixed_star": true,
+      "trail_color": [
+        170,
+        98,
+        25
+      ]
     },
     {
       "name": "地球",
       "mass": 5.97237e+24,
       "init_position": [
-        0.0,
+        -0.0,
         0.0,
         0.0
       ],
       "init_velocity": [
-        0.0,
+        -0.0,
         0.0,
         0.0
       ],
@@ -50,19 +55,24 @@
       "distance_scale": 1.0,
       "rotation_speed": 15,
       "ignore_mass": false,
-      "is_fixed_star": false
+      "is_fixed_star": false,
+      "trail_color": [
+        1,
+        89,
+        162
+      ]
     },
     {
       "name": "月球",
       "mass": 7.342e+22,
       "init_position": [
-        384400.0,
+        -0.0,
         0.0,
-        0.0
+        384400.0
       ],
       "init_velocity": [
+        -1.0230000019073486,
         0.0,
-        1.0230000019073486,
         0.0
       ],
       "density": 3344.0,
@@ -76,7 +86,12 @@
       "distance_scale": 1.0,
       "rotation_speed": 0.5487,
       "ignore_mass": false,
-      "is_fixed_star": false
+      "is_fixed_star": false,
+      "trail_color": [
+        162,
+        162,
+        162
+      ]
     }
   ],
   "params": {
@@ -85,6 +100,8 @@
       0,
       0,
       0
-    ]
+    ],
+    "show_trail": false,
+    "show_name": false
   }
 }
\ No newline at end of file

data/tri_bodies_perfect_01.json

@@ -4,14 +4,14 @@
       "name": "红轨太阳A",
       "mass": 2e+30,
       "init_position": [
+        -518222240.0,
         0.0,
-        518222240.0,
         0.0
       ],
       "init_velocity": [
-        -14.890000343322754,
+        -0.0,
         0.0,
-        0.0
+        -14.890000343322754
       ],
       "density": 1408.0,
       "color": [
@@ -19,28 +19,30 @@
         98,
         25
       ],
+      "texture": "sun2.jpg",
+      "size_scale": 50.0,
+      "distance_scale": 1.0,
+      "rotation_speed": 0.1,
+      "ignore_mass": false,
+      "is_fixed_star": true,
       "trail_color": [
         255,
         0,
         0
-      ],
-      "texture": "sun2.jpg",
-      "size_scale": 50.0,
-      "distance_scale": 1.0,
-      "is_fixed_star": true
+      ]
     },
     {
       "name": "绿轨太阳B",
       "mass": 2e+30,
       "init_position": [
-        -299195744.0,
+        -0.0,
         0.0,
-        0.0
+        -299195744.0
       ],
       "init_velocity": [
-        7.445000171661377,
-        -12.895118713378906,
-        0.0
+        12.895118713378906,
+        0.0,
+        7.445000171661377
       ],
       "density": 1408.0,
       "color": [
@@ -48,28 +50,30 @@
         98,
         25
       ],
+      "texture": "sun2.jpg",
+      "size_scale": 50.0,
+      "distance_scale": 1.0,
+      "rotation_speed": 0.1,
+      "ignore_mass": false,
+      "is_fixed_star": true,
       "trail_color": [
         0,
         255,
         0
-      ],
-      "texture": "sun2.jpg",
-      "size_scale": 50.0,
-      "distance_scale": 1.0,
-      "is_fixed_star": true
+      ]
     },
     {
       "name": "蓝轨太阳C",
       "mass": 2e+30,
       "init_position": [
-        299195744.0,
+        -0.0,
         0.0,
-        0.0
+        299195744.0
       ],
       "init_velocity": [
-        7.445000171661377,
-        12.895118713378906,
-        0.0
+        -12.895118713378906,
+        0.0,
+        7.445000171661377
       ],
       "density": 1408.0,
       "color": [
@@ -77,28 +81,30 @@
         98,
         25
       ],
+      "texture": "sun2.jpg",
+      "size_scale": 50.0,
+      "distance_scale": 1.0,
+      "rotation_speed": 0.1,
+      "ignore_mass": false,
+      "is_fixed_star": true,
       "trail_color": [
         0,
         0,
         255
-      ],
-      "texture": "sun2.jpg",
-      "size_scale": 50.0,
-      "distance_scale": 1.0,
-      "is_fixed_star": true
+      ]
     },
     {
       "name": "流浪地球",
       "mass": 5.97237e+24,
       "init_position": [
-        0.0,
-        86370368.0,
-        747989376.0
+        -86370368.0,
+        747989376.0,
+        0.0
       ],
       "init_velocity": [
-        0.0,
-        0.0,
-        -10.0
+        -0.0,
+        -10.0,
+        0.0
       ],
       "density": 5507.85,
       "color": [
@@ -108,7 +114,15 @@
       ],
       "texture": "earth1.jpg",
       "size_scale": 4000.0,
-      "distance_scale": 1
+      "distance_scale": 1,
+      "rotation_speed": null,
+      "ignore_mass": false,
+      "is_fixed_star": false,
+      "trail_color": [
+        1,
+        89,
+        162
+      ]
     }
   ],
   "params": {

data/tri_bodies_perfect_02.json

@@ -4,14 +4,14 @@
       "name": "红轨太阳A",
       "mass": 2e+30,
       "init_position": [
+        -518222240.0,
         0.0,
-        518222240.0,
         0.0
       ],
       "init_velocity": [
-        -14.890000343322754,
+        -0.0,
         0.0,
-        0.0
+        -14.890000343322754
       ],
       "density": 1408.0,
       "color": [
@@ -19,28 +19,30 @@
         98,
         25
       ],
+      "texture": "sun2.jpg",
+      "size_scale": 50.0,
+      "distance_scale": 1.0,
+      "rotation_speed": 0.1,
+      "ignore_mass": false,
+      "is_fixed_star": true,
       "trail_color": [
         255,
         0,
         0
-      ],
-      "texture": "sun2.jpg",
-      "size_scale": 50.0,
-      "distance_scale": 1.0,
-      "is_fixed_star": true
+      ]
     },
     {
       "name": "绿轨太阳B",
       "mass": 2e+30,
       "init_position": [
-        -299195744.0,
+        -0.0,
         0.0,
-        0.0
+        -299195744.0
       ],
       "init_velocity": [
-        7.445000171661377,
-        -12.895118713378906,
-        0.0
+        12.895118713378906,
+        0.0,
+        7.445000171661377
       ],
       "density": 1408.0,
       "color": [
@@ -48,28 +50,30 @@
         98,
         25
       ],
+      "texture": "sun2.jpg",
+      "size_scale": 50.0,
+      "distance_scale": 1.0,
+      "rotation_speed": 0.1,
+      "ignore_mass": false,
+      "is_fixed_star": true,
       "trail_color": [
         0,
         255,
         0
-      ],
-      "texture": "sun2.jpg",
-      "size_scale": 50.0,
-      "distance_scale": 1.0,
-      "is_fixed_star": true
+      ]
     },
     {
       "name": "蓝轨太阳C",
       "mass": 2e+30,
       "init_position": [
-        299195744.0,
+        -0.0,
         0.0,
-        0.0
+        299195744.0
       ],
       "init_velocity": [
-        7.445000171661377,
-        12.895118713378906,
-        0.0
+        -12.895118713378906,
+        0.0,
+        7.445000171661377
       ],
       "density": 1408.0,
       "color": [
@@ -77,15 +81,17 @@
         98,
         25
       ],
+      "texture": "sun2.jpg",
+      "size_scale": 50.0,
+      "distance_scale": 1.0,
+      "rotation_speed": 0.1,
+      "ignore_mass": false,
+      "is_fixed_star": true,
       "trail_color": [
         0,
         0,
         255
-      ],
-      "texture": "sun2.jpg",
-      "size_scale": 50.0,
-      "distance_scale": 1.0,
-      "is_fixed_star": true
+      ]
     }
   ],
   "params": {

data/tri_bodies_perfect_03.json

@@ -4,14 +4,14 @@
       "name": "红轨太阳A",
       "mass": 2e+30,
       "init_position": [
+        -518222240.0,
         0.0,
-        "$exp:math.sqrt(3) * 2 * AU",
         0.0
       ],
       "init_velocity": [
-        -14.89,
+        -0.0,
         0.0,
-        0.0
+        -14.890000343322754
       ],
       "density": 1408.0,
       "color": [
@@ -19,28 +19,30 @@
         98,
         25
       ],
+      "texture": "sun2.jpg",
+      "size_scale": 50.0,
+      "distance_scale": 1.0,
+      "rotation_speed": 0.1,
+      "ignore_mass": false,
+      "is_fixed_star": true,
       "trail_color": [
         255,
         0,
         0
-      ],
-      "texture": "sun2.jpg",
-      "size_scale": 50.0,
-      "distance_scale": 1.0,
-      "is_fixed_star": true
+      ]
     },
     {
       "name": "绿轨太阳B",
       "mass": 2e+30,
       "init_position": [
-        "$exp: -2 * AU",
+        -0.0,
         0.0,
-        0.0
+        -299195744.0
       ],
       "init_velocity": [
-        "$exp: 1/2 * 14.88",
-        "$exp:-math.sqrt(3) / 2 * 14.88",
-        0.0
+        12.886458396911621,
+        0.0,
+        7.440000057220459
       ],
       "density": 1408.0,
       "color": [
@@ -48,28 +50,30 @@
         98,
         25
       ],
+      "texture": "sun2.jpg",
+      "size_scale": 50.0,
+      "distance_scale": 1.0,
+      "rotation_speed": 0.1,
+      "ignore_mass": false,
+      "is_fixed_star": true,
       "trail_color": [
         0,
         255,
         0
-      ],
-      "texture": "sun2.jpg",
-      "size_scale": 50.0,
-      "distance_scale": 1.0,
-      "is_fixed_star": true
+      ]
     },
     {
       "name": "蓝轨太阳C",
       "mass": 2e+30,
       "init_position": [
-        "$exp: 2 * AU",
+        -0.0,
         0.0,
-        0.0
+        299195744.0
       ],
       "init_velocity": [
-        "$exp: 1/2 * 14.88",
-        "$exp:math.sqrt(3) / 2 * 14.88",
-        0.0
+        -12.886458396911621,
+        0.0,
+        7.440000057220459
       ],
       "density": 1408.0,
       "color": [
@@ -77,15 +81,17 @@
         98,
         25
       ],
+      "texture": "sun2.jpg",
+      "size_scale": 50.0,
+      "distance_scale": 1.0,
+      "rotation_speed": 0.1,
+      "ignore_mass": false,
+      "is_fixed_star": true,
       "trail_color": [
         0,
         0,
         255
-      ],
-      "texture": "sun2.jpg",
-      "size_scale": 50.0,
-      "distance_scale": 1.0,
-      "is_fixed_star": true
+      ]
     }
   ],
   "params": {

data/tri_bodies_perfect_04.json

@@ -4,14 +4,14 @@
       "name": "红轨太阳A",
       "mass": 2e+30,
       "init_position": [
+        -518222240.0,
         0.0,
-        518222240.0,
         0.0
       ],
       "init_velocity": [
-        -12.0,
+        -0.0,
         0.0,
-        0.0
+        -12.0
       ],
       "density": 1408.0,
       "color": [
@@ -35,14 +35,14 @@
       "name": "绿轨太阳B",
       "mass": 2e+30,
       "init_position": [
-        -299195744.0,
+        -0.0,
         0.0,
-        0.0
+        -299195744.0
       ],
       "init_velocity": [
-        6.0,
-        -10.392304420471191,
-        0.0
+        10.392304420471191,
+        0.0,
+        6.0
       ],
       "density": 1408.0,
       "color": [
@@ -66,14 +66,14 @@
       "name": "蓝轨太阳C",
       "mass": 2e+30,
       "init_position": [
-        299195744.0,
+        -0.0,
         0.0,
-        0.0
+        299195744.0
       ],
       "init_velocity": [
-        6.0,
-        10.392304420471191,
-        0.0
+        -10.392304420471191,
+        0.0,
+        6.0
       ],
       "density": 1408.0,
       "color": [

data/tri_bodies_perfect_05.json

@@ -4,14 +4,14 @@
       "name": "红轨太阳A",
       "mass": 2e+30,
       "init_position": [
+        -518222240.0,
         0.0,
-        518222240.0,
         0.0
       ],
       "init_velocity": [
-        -19.0,
+        -0.0,
         0.0,
-        0.0
+        -19.0
       ],
       "density": 1408.0,
       "color": [
@@ -35,14 +35,14 @@
       "name": "绿轨太阳B",
       "mass": 2e+30,
       "init_position": [
-        -299195744.0,
+        -0.0,
         0.0,
-        0.0
+        -299195744.0
       ],
       "init_velocity": [
-        9.5,
-        -16.454483032226562,
-        0.0
+        16.454483032226562,
+        0.0,
+        9.5
       ],
       "density": 1408.0,
       "color": [
@@ -66,14 +66,14 @@
       "name": "蓝轨太阳C",
       "mass": 2e+30,
       "init_position": [
-        299195744.0,
+        -0.0,
         0.0,
-        0.0
+        299195744.0
       ],
       "init_velocity": [
-        9.5,
-        16.454483032226562,
-        0.0
+        -16.454483032226562,
+        0.0,
+        9.5
       ],
       "density": 1408.0,
       "color": [

sim_scenes/fiction/fixed_stars.py

@@ -48,7 +48,8 @@ if __name__ == '__main__':
             d = pow((body.raduis + bodies[idx - 1].raduis) * SIZE_SCALE, 1.0) * 1.1
         # d = (body.diameter + bodies[idx - 1].diameter) * SIZE_SCALE * 1.1 + D
         body.init_velocity = [0, 0, 0]
-        body.init_position = [body.raduis * SIZE_SCALE, (distance_sum + d), AU]
+        # body.init_position = [body.raduis * SIZE_SCALE, (distance_sum + d), AU]
+        body.init_position = [-(distance_sum + d), AU, body.raduis * SIZE_SCALE]
         distance_sum += d
 
     # 使用 ursina 查看的运行效果

sim_scenes/fiction/sun_dysen_sphere.py

@@ -15,7 +15,7 @@ if __name__ == '__main__':
     太阳、戴森球
     """
 
-    sun = Sun(size_scale=5e1, init_velocity=[0, 2, 0])  # 太阳放大 50 倍
+    sun = Sun(size_scale=5e1, init_velocity=[-2, 0, 0])  # 太阳放大 50 倍
     bodies = [
         sun,
         DysenSphere(size_scale=5e1, parent=sun),  # 戴森球放大 50 倍
@@ -28,4 +28,4 @@ if __name__ == '__main__':
     # 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, AU / 4, -3 * AU),
-               bg_music="sounds/universe_02.mp3")
+               bg_music="sounds/interstellar.mp3")

sim_scenes/interest/text_bodies.py

@@ -26,8 +26,10 @@ def show_text_bodies():
                                          params={"camera_pos": camera_pos})
     # 放一个恒星作为背景
     bg = FixedStar(name="bg", texture="fixed_star.png", mass=2e32, color=(0xff, 0xf8, 0xd4),
-                   init_position=[6000 * D, 450 * D, 100 * D],  # [ 远+近-  , 左+右-  , 上+下-]
+                   # init_position=[6000 * D, 450 * D, 100 * D],  # [ 远+近-  , 左+右-  , 上+下-]
+                   init_position=[-450 * D, 100 * D, 6000 * D],  # [ 远+近-  , 左+右-  , 上+下-]
                    ignore_mass=True)
+
     bodies.append(bg)
 
     # 使用 ursina 查看的运行效果

sim_scenes/interest/the_eye_of_god.py

@@ -25,7 +25,8 @@ def show_eye_of_god():
                                          params={"camera_pos": camera_pos})
     # 放一个恒星作为背景
     bg = FixedStar(name="bg", texture="fixed_star.png", mass=2e32, color=(0xff, 0xf8, 0xd4),
-                   init_position=[6000 * D, 400 * D, 100 * D],  # [ 远+近-  , 左+右-  , 上+下-]
+                   # init_position=[6000 * D, 400 * D, 100 * D],  # [ 远+近-  , 左+右-  , 上+下-]
+                   init_position=[-400 * D, 100 * D, 6000 * D],  # [ 远+近-  , 左+右-  , 上+下-]
                    ignore_mass=True)
     bodies.append(bg)
 

sim_scenes/interest/utils/body_utils.py

@@ -43,7 +43,11 @@ def gen_bodies_from_image(pixel_image, params, texture="color_body.png"):
 
     def get_position(pos, scale):
         # return get_scaled_body_pos((camera_pos[2], camera_pos[0], camera_pos[1]), pos, scale)
-        return get_scaled_body_pos((camera_pos[2], camera_pos[1], camera_pos[0]), pos, scale)
+        # return get_scaled_body_pos((camera_pos[2], camera_pos[1], camera_pos[0]), pos, scale)
+        return get_scaled_body_pos((camera_pos[0], camera_pos[1], camera_pos[2]), pos, scale)
+
+        # # body.init_position = [body.raduis * SIZE_SCALE, (distance_sum + d), AU]
+        # body.init_position = [-(distance_sum + d), AU, body.raduis * SIZE_SCALE]
 
         # # [ 远+近-  , 左+右-  , 上+下-]
         # return pos[0] + (scale - 1.0) * 300 * (random.randint(90, 110)) * D, pos[1], pos[2]
@@ -58,7 +62,7 @@ def gen_bodies_from_image(pixel_image, params, texture="color_body.png"):
     width, height = img.size
     interval_factor = 20  # 星球间距因子
     body_template = 'ColorBody(name="%s", mass=mass, color=(%d, %d, %d), size_scale=%.4f, ' \
-                    'init_position=get_position([0, %g * D, %g * D], %.4f), ' \
+                    'init_position=get_position([-%g * D, %g * D, 0], %.4f), ' \
                     f'init_velocity=[0, 0, 0], ignore_mass=True, texture="{texture}").set_light_disable(True)'
     bodies_str = "["
 

sim_scenes/science/gravity_slingshot_1.py

@@ -18,10 +18,12 @@ if __name__ == '__main__':
     bodies = [
         Sun(size_scale=2e1),    # 太阳放大 20 倍
         Earth(size_scale=1e3,   # 地球放大 1000 倍
-              init_position=[0, -3 * AU, 0],  # 地球距离太阳 3 个天文单位
+              # init_position=[0, -3 * AU, 0],  # 地球距离太阳 3 个天文单位
+              init_position=[3 * AU, 0, 0],  # 地球距离太阳 3 个天文单位
               # TODO: 尝试调整朝向太阳的速度，取值 33、38、50 或者其他
               # init_velocity=[0, 33, -1],
-              init_velocity=[0, 38, -1],  # 朝向太阳的速度为 38km/s，-1 km/s 是为了防止地球正面对着太阳冲去
+              # init_velocity=[0, 38, -1],  # 朝向太阳的速度为 38km/s，-1 km/s 是为了防止地球正面对着太阳冲去
+              init_velocity=[-38, -1, 0],  # 朝向太阳的速度为 38km/s，-1 km/s 是为了防止地球正面对着太阳冲去
               # init_velocity=[0, 50, -1],
               ),
     ]

sim_scenes/science/gravity_slingshot_2.py

@@ -16,12 +16,13 @@ if __name__ == '__main__':
     模拟流浪地球经过木星、土星加速
     """
     bodies = [
-        Jupiter(size_scale=1e2, init_position=[0, AU / 4, 0], init_velocity=[0, 0, 0]),  # 木星放大 100 倍
-        Saturn(size_scale=1e2, init_position=[AU/1.5, 1.5 * AU, 0], init_velocity=[0, 0, 0]),  # 土星放大 100 倍
+        Jupiter(size_scale=1e2, init_position=[-AU / 4, 0, 0], init_velocity=[0, 0, 0]),  # 木星放大 100 倍
+        Saturn(size_scale=1e2, init_position=[-1.5 * AU, 0, AU / 1.5], init_velocity=[0, 0, 0]),  # 土星放大 100 倍
         Earth(size_scale=3e2,  # 地球放大 300 倍
               init_position=[0, 0, 0],  #
               # init_velocity=[0, 33, -1],
-              init_velocity=[-1, 10, 0],  # 朝向木星的速度为 38km/s，-1 km/s 是为了防止地球正面对着木星冲去
+              # init_velocity=[-1, 10, 0],  # 朝向木星的速度为 38km/s，-1 km/s 是为了防止地球正面对着木星冲去
+              init_velocity=[-10, 0, -1],  # 朝向木星的速度为 38km/s，-1 km/s 是为了防止地球正面对着木星冲去
               # init_velocity=[0, 50, -1],
               ),
     ]

sim_scenes/solar_system/earth_at_night.py

@@ -17,13 +17,14 @@ if __name__ == '__main__':
     https://www.nasa.gov/mission_pages/NPP/news/earth-at-night.html
     https://www.nasa.gov/sites/default/files/images/712130main_8246931247_e60f3c09fb_o.jpg
     """
-    resolution = 500
+    resolution = 50
+    # resolution = 500
     bodies = [
         Earth(texture="earth_at_night_hd.jpg",
               init_position=[0, 0, 0], init_velocity=[0, 0, 0],
               size_scale=100, ignore_mass=True).set_resolution(resolution),
         Earth(texture="earth_hd.jpg",
-              init_position=[0, 10, 0], init_velocity=[0, 0, 0],
+              init_position=[-10, 0, 0], init_velocity=[0, 0, 0],
               size_scale=100, ignore_mass=True).set_resolution(resolution)
     ]
     # 使用 ursina 查看的运行效果

sim_scenes/solar_system/earth_moon.py

@@ -14,19 +14,23 @@ from bodies.body import AU
 if __name__ == '__main__':
     """
     地球、月球
+init_position=[x, y, z],
+init_position=[-y, z, x],
+init_velocity=[x, y, z],
+init_velocity=[-y, z, x],
     """
     # 地球的Y方向初始速度
     EARTH_INIT_VELOCITY = 0
     bodies = [
         # sun,
         Earth(init_position=[0, 0, 0],
-              init_velocity=[0, EARTH_INIT_VELOCITY, 0], size_scale=0.5e1),  # 地球放大 5 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=[-EARTH_INIT_VELOCITY, 0, 0], size_scale=0.5e1),  # 地球放大 5 倍，距离保持不变
+        Moon(init_position=[0, 0, 363104],  # 距地距离约: 363104 至 405696 km
+             init_velocity=[-(EARTH_INIT_VELOCITY + 1.023), 0, 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
     # 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_MONTH, position=(-300000, 200000, -1300000), show_trail=True)
+    ursina_run(bodies, SECONDS_PER_DAY, position=(-300000, 200000, -1300000), show_trail=True)

sim_scenes/solar_system/earth_moon6.py

@@ -32,4 +32,4 @@ if __name__ == '__main__':
     # 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, 60, position=(0, 0, 0), show_trail=True, view_closely=0.001)
+    ursina_run(bodies, 60, position=(0, 0, -4 * e.diameter), show_trail=True, view_closely=0.001)

sim_scenes/solar_system/hd_earth.py

@@ -17,11 +17,11 @@ if __name__ == '__main__':
     bodies = [
         Earth(texture="earth_hd.jpg",
               init_position=[0, 0, 0], init_velocity=[0, 0, 0],
-              size_scale=100, show_name=True)
+              size_scale=1, show_name=True)
     ]
     # 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_HOUR, position=(0, 30000, -2000000),
+    ursina_run(bodies, SECONDS_PER_HOUR, position=(0, 0, -20000),
                # cosmic_bg="textures/cosmic1.jpg",
-               view_closely=True)
+               view_closely=0.001)

sim_scenes/solar_system/hd_mercury.py

@@ -17,11 +17,11 @@ if __name__ == '__main__':
     bodies = [
         Mercury(texture="mercury_hd.tif",
                 init_position=[0, 0, 0], init_velocity=[0, 0, 0],
-                size_scale=100, show_name=True)
+                size_scale=1, show_name=True)
     ]
     # 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_DAY, position=(0, 30000, -800000),
+    ursina_run(bodies, SECONDS_PER_DAY, position=(0, 0, -8000),
                # cosmic_bg="textures/cosmic1.jpg",
-               view_closely=True)
+               view_closely=0.001)

sim_scenes/solar_system/hd_pluto.py

@@ -7,7 +7,7 @@
 # python_version  :3.8
 # ==============================================================================
 from bodies import Pluto
-from common.consts import SECONDS_PER_WEEK, SECONDS_PER_DAY
+from common.consts import SECONDS_PER_HOUR, SECONDS_PER_DAY
 from sim_scenes.func import ursina_run
 
 if __name__ == '__main__':
@@ -17,11 +17,11 @@ if __name__ == '__main__':
     bodies = [
         Pluto(texture="pluto_hd.jpg",
               init_position=[0, 0, 0], init_velocity=[0, 0, 0],
-              size_scale=100, show_name=True)
+              size_scale=2, show_name=True)
     ]
     # 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_DAY, position=(0, 10000, -450000),
+    ursina_run(bodies, SECONDS_PER_HOUR, position=(0, 0, -9000),
                # cosmic_bg="textures/cosmic1.jpg",
-               view_closely=True)
+               view_closely=0.001)

sim_scenes/solar_system/hd_venus.py

@@ -17,11 +17,11 @@ if __name__ == '__main__':
     bodies = [
         Venus(texture="venus_hd.jpg",
               init_position=[0, 0, 0], init_velocity=[0, 0, 0],
-              size_scale=100, show_name=True)
+              size_scale=1, show_name=True)
     ]
     # 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_DAY, position=(0, 30000, -1500000),
+    ursina_run(bodies, SECONDS_PER_DAY, position=(0, 0, -20000),
                # cosmic_bg="textures/cosmic1.jpg",
-               view_closely=True)
+               view_closely=0.001)

sim_scenes/solar_system/solar_system_1.py

@@ -20,7 +20,7 @@ if __name__ == '__main__':
     #  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=0.8e2)       # 太阳放大 80 倍，距离保持不变
-    # sun.init_velocity = [0, 0, 2]                # 太阳带着其他行星一起跑
+    # sun.init_velocity = [0, 2, 0]                 # 太阳带着其他行星一起跑
     bodies = [
         sun,
         Mercury(name="水星", size_scale=4e3),      # 水星放大 4000 倍，距离保持不变

sim_scenes/solar_system/solar_system_3.py

@@ -49,16 +49,16 @@ if __name__ == '__main__':
     NUM_OF_ASTEROIDS = 10
     asteroids = []
     angles = np.linspace(0, 100 * np.pi, NUM_OF_ASTEROIDS)
-    pxs, pys, vxs, vys = get_positions_velocitys(angles,
+    pxs, pzs, vxs, vzs = get_positions_velocitys(angles,
                                                  radius=1.60 * AU,
                                                  velocity=23.37,
                                                  radius_offset=0.1 * AU,
                                                  velocity_offset=0.2)
     for i, px in enumerate(pxs):
-        py, fx, fy = pys[i], vxs[i], vys[i]
+        pz, fx, fz = pzs[i], vxs[i], vzs[i]
         asteroids.append(Asteroid(size_scale=3e9,  # 小行星放大 5000000000 倍，距离放大 1.4 倍
-                                  init_position=[px, py, 0],
-                                  init_velocity=[fx, fy, 0],
+                                  init_position=[px, 0, pz],
+                                  init_velocity=[fx, 0, fz],
                                   distance_scale=1.4))
     # endregion 2
 

sim_scenes/solar_system/sun_earth_moon.py

@@ -17,18 +17,18 @@ if __name__ == '__main__':
     """
     # 地球的Y方向初始速度
     EARTH_INIT_VELOCITY = 0  # 0km/s
-    sun = Sun(init_position=[AU, 0, 0], size_scale=2e1)  # 太阳放大 20 倍
-    # 忽略质量的引力
+    sun = Sun(init_position=[0, 0, AU], size_scale=2e1)  # 太阳放大 20 倍
+    # 忽略质量的引力 [x, y, z]->[-y, z, x]
     sun.ignore_mass = True
 
     # 观看月相变化的过程：分别是 新月、蛾眉月、上弦月、盈凸、满月、亏凸、下弦月、残月
     # 参考：images/moon/月相变化过程.jpeg
     # TODO: 月球在摄像机的前方（从 “新月” 开始）
-    moon_pos, moon_vel = [384400, 0, 0], [0, EARTH_INIT_VELOCITY + 1.023, 0]
-    # TODO: 月球在摄像机的右方（从 “下弦月” 开始），将会出现
-    # moon_pos, moon_vel = [0, -384400, 0], [1.023, EARTH_INIT_VELOCITY, 0]
-    # TODO: 月月球在摄像机的左方（从 “上弦月” 开始）
-    # moon_pos, moon_vel = [0, 384400, 0], [-1.023, EARTH_INIT_VELOCITY, 0]
+    # moon_pos, moon_vel = [0, 0, 384400], [-(EARTH_INIT_VELOCITY + 1.023), 0, 0]
+    # TODO: 月球在摄像机的右方（从 “下弦月” 开始），将会从右方出现
+    # moon_pos, moon_vel = [384400, 0, 0], [-EARTH_INIT_VELOCITY, 0, 1.023]
+    # TODO: 月球在摄像机的左方（从 “上弦月” 开始）
+    moon_pos, moon_vel = [-384400, 0, 0], [EARTH_INIT_VELOCITY, 0, -1.023]
 
     bodies = [
         sun,

sim_scenes/tri_bodies/tri_bodies_perfect.py

@@ -27,6 +27,7 @@ if __name__ == '__main__':
     # p = 16  # TODO: 三体转圆形花
     # p = 18  # TODO: 三体转圆形花
     # p = 19  # TODO: 三体转圆形花
+    # [x, y, z]->[-y, z, x]
     bodies = [
         Sun(name="红轨太阳A", mass=mass,
             init_position=[0, math.sqrt(3) * r, 0],

sim_scenes/tri_bodies/two_bodies_01.py

@@ -19,9 +19,9 @@ if __name__ == '__main__':
     3、天体质量 mass    
     """
     bodies = [
-        Sun(mass=1.5e30, init_position=[849597870.700, 0, 0], init_velocity=[0, 7.0, 0],
+        Sun(mass=1.5e30, init_position=[849597870, 0, 0], init_velocity=[0, 7.0, 0],trail_color=(255,0,0),
             size_scale=5e1, texture="sun1.jpg"),  # 太阳放大 100 倍
-        Sun(mass=2e30, init_position=[0, 0, 0], init_velocity=[0, -8.0, 0],
+        Sun(mass=1.5e30, init_position=[0, 0, 0], init_velocity=[0, -8.0, 0],
             size_scale=5e1, texture="sun2.jpg"),  # 太阳放大 100 倍
         Earth(init_position=[0, 349597870.700, 0], init_velocity=[10.50, 0, 0],
               size_scale=4e3, distance_scale=1),  # 地球放大 4000 倍，距离保持不变
@@ -33,4 +33,4 @@ if __name__ == '__main__':
     # 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_YEAR, position=(AU, 2 * AU, -7 * AU), show_trail=True)
+    ursina_run(bodies, SECONDS_PER_YEAR, position=(1.5 * AU, 0, -7 * AU), show_trail=True)
\ No newline at end of file

sim_scenes/ursina_json_sim.py

@@ -29,7 +29,7 @@ if __name__ == '__main__':
     # TODO: 去掉注释，完美数据的三体模型的演示05（画大花）
     # bodies, params = Body.build_bodies_from_json('../data/tri_bodies_perfect_05.json')
     # TODO: 去掉注释，引力弹弓的演示
-    # bodies, params = Body.build_bodies_from_json('../data/gravity_slingshot.json')
+    bodies, params = Body.build_bodies_from_json('../data/gravity_slingshot.json')
 
     dt = params["dt"] if "dt" in params else SECONDS_PER_YEAR
     position = params["position"] if "position" in params else (0, 0, 0)

simulators/ursina/entities/body_trail.py

@@ -40,5 +40,14 @@ class BodyTrail(Entity):
 
         v_arrow, v_line, v_text = create_arrow_line((0, 0, 0), tuple(vel_direction), parent=self,
                                                     label=vel_info, color=color.red, alpha=0.8, arrow_scale=0.5)
+        if str(vel_info).startswith("0.00"):
+            v_text.parent = self
+            v_arrow.enabled = False
+            v_line.enabled = False
+
         a_arrow, a_line, a_text = create_arrow_line((0, 0, 0), tuple(acc_direction), parent=self,
                                                     label=acc_info, color=color.yellow, alpha=0.8, arrow_scale=0.5)
+        if str(acc_info).startswith("0.00"):
+            a_text.parent = self
+            a_arrow.enabled = False
+            a_line.enabled = False

simulators/ursina/entities/entity_utils.py

@@ -173,7 +173,7 @@ def clear_trails(self):
     self.trails.clear()
 
 
-def create_fixed_star_lights(parent):
+def create_fixed_star_lights(fixed_star):
     """
     创建恒星的发光的效果、并作为灯光源
     :param entity:
@@ -181,14 +181,14 @@ def create_fixed_star_lights(parent):
     """
 
     # 如果是恒星（如：太阳），自身会发光，则需要关闭灯光
-    parent.set_light_off()
+    fixed_star.set_light_off()
 
     # lights = []
     # # 创建多个新的 Entity 对象，作为光晕的容器
     # _color = color.rgba(1.0, 0.6, 0.2, 1)
-    if hasattr(parent.body_view.body, "glows"):
+    if hasattr(fixed_star.body_view.body, "glows"):
         # glows = (glow_num:10, glow_scale:1.03 glow_alpha:0.1~1)
-        glows = parent.body_view.body.glows
+        glows = fixed_star.body_view.body.glows
         if glows is not None:
             if isinstance(glows, tuple):
                 if len(glows) == 3:
@@ -210,16 +210,16 @@ def create_fixed_star_lights(parent):
                         glow_alpha = glow_alphas[-1]
 
                 # _color = color.white
-                _color = parent.body_view.body.color
+                _color = fixed_star.body_view.body.color
                 _color = color.rgba(_color[0] / 255, _color[1] / 255, _color[2] / 255, 1)
                 for i in range(glow_num):
-                    glow_entity = Entity(parent=parent, model='sphere', color=_color,
+                    glow_entity = Entity(parent=fixed_star, model='sphere', color=_color,
                                          scale=math.pow(glow_scale, i + 1), alpha=glow_alpha)
-    if hasattr(parent.body_view.body, "light_on"):
-        if parent.body_view.body.light_on:
+    if hasattr(fixed_star.body_view.body, "light_on"):
+        if fixed_star.body_view.body.light_on:
             for i in range(2):
                 # 创建 PointLight 对象，作为恒星的灯光源
-                light = PointLight(parent=parent, intensity=10, range=10, color=color.white)
+                light = PointLight(parent=fixed_star, intensity=10, range=10, color=color.white)
 
 
 def merge_vectors(vectors):
@@ -229,11 +229,11 @@ def merge_vectors(vectors):
     # 计算速度的方向
     direction = (x / value, y / value, z / value)
     # 返回速度大小和速度方向
-    # return value, direction
+    return value, direction
 
     # return value,  (direction[1], direction[0], direction[2])
     # return value, (direction[1], direction[2], direction[0])
-    return value, (-direction[1], direction[2], direction[0])
+    # return value, (-direction[1], direction[2], direction[0])
 
 
 def create_trail_info(body, trail):
@@ -256,10 +256,10 @@ def create_trail_info(body, trail):
     acc_direction = np.array(acc_direction) * 2
 
     vel_position = vel_direction
-    vel_position = (vel_position[0], vel_position[1], vel_position[2])
+    # vel_position = (vel_position[0], vel_position[1], vel_position[2])
 
     acc_position = acc_direction
-    acc_position = (acc_position[0], acc_position[1], acc_position[2])
+    # acc_position = (acc_position[0], acc_position[1], acc_position[2])
 
     trail.entity_infos = {"velocity": [vel_info, vel_direction, vel_position],
                           "acceleration": [acc_info, acc_direction, acc_position]}

simulators/ursina/entities/planet.py

@@ -100,7 +100,7 @@ class Planet(Entity):
             # 创建行星环（目前只有土星环）
             create_rings(self)
 
-    def turn(self):
+    def update(self):
         if hasattr(self.body, "torus_stars"):
             # 星环小天体群（主要模拟小行星群，非一个天体）不受 body_size_factor 影响
             self.scale = self.init_scale
@@ -110,9 +110,12 @@ class Planet(Entity):
         pos = self.body_view.position * UrsinaConfig.SCALE_FACTOR
         if self.body.parent is None:
             # TODO: ????????
-            self.x = -pos[1]
-            self.y = pos[2]
-            self.z = pos[0]
+            # self.x = -pos[1]
+            # self.y = pos[2]
+            # self.z = pos[0]
+            self.x = pos[0]
+            self.y = pos[1]
+            self.z = pos[2]
         else:
             self.follow_parent()
 
@@ -146,12 +149,13 @@ class Planet(Entity):
                                        self.rotation_y,
                                        self.rotation_z)
 
-        if UrsinaConfig.show_trail:
-            # 有时候第一个位置不正确，所以判断一下有历史记录后在创建
-            if len(self.body.his_position()) > 1:
-                create_trails(self)
-        else:
-            clear_trails(self)
+        if not hasattr(self.body, "show_trail") or self.body.show_trail:
+            if UrsinaConfig.show_trail:
+                # 有时候第一个位置不正确，所以判断一下有历史记录后在创建
+                if len(self.body.his_position()) > 1:
+                    create_trails(self)
+            else:
+                clear_trails(self)
 
         if hasattr(self, "name_text"):
             d = (camera.world_position - self.name_text.world_position).length()
@@ -177,9 +181,12 @@ class Planet(Entity):
                     break
         pos = self.f_parent.position * UrsinaConfig.SCALE_FACTOR
         # TODO: ????????
-        self.x = -pos[1]
-        self.y = pos[2]
-        self.z = pos[0]
+        # self.x = -pos[1]
+        # self.y = pos[2]
+        # self.z = pos[0]
+        self.x = pos[0]
+        self.y = pos[1]
+        self.z = pos[2]
 
     def destroy_all(self):
         # 从天体系统中移除自己（TODO:暂时还不能移除）

simulators/ursina/ursina_mesh.py

@@ -92,7 +92,7 @@ def create_arrow(height=0.5, width=0.1):
 
 
 def create_arrow_line(from_pos, to_pos, parent=None, label=None,
-                      set_light_off=True, alpha=1.0,
+                      set_light_off=True, alpha=1.0, len_scale=0.5,
                       color=color.white, thickness=2,
                       arrow_scale=1, text_scale=50):
     """
@@ -103,6 +103,7 @@ def create_arrow_line(from_pos, to_pos, parent=None, label=None,
     @param label: 箭头显示的文字
     @param set_light_off: 是否设置为灯光关闭状态
     @param alpha: 透明度
+    @param len_scale: 长度缩放
     @param color: 箭头线颜色
     @param thickness: 线段粗细
     @param arrow_scale: 箭头缩放
@@ -111,12 +112,13 @@ def create_arrow_line(from_pos, to_pos, parent=None, label=None,
     height = 0.5 * thickness
     width = 0.1 * thickness
     arrow_mesh = create_arrow(height, width)
-    verts = (Vec3(from_pos), Vec3(to_pos))
-    line = Entity(parent=parent, model=Mesh(vertices=verts, mode='line', thickness=thickness),
+    from_pos, to_pos = (Vec3(from_pos), Vec3(to_pos))
+    line = Entity(parent=parent,
+                  model=Mesh(vertices=(from_pos * len_scale, to_pos * len_scale), mode='line', thickness=thickness),
                   color=color, alpha=alpha)
-    arrow = Entity(parent=line, model=arrow_mesh, position=verts[1],
+    arrow = Entity(parent=line, model=arrow_mesh, position=to_pos * len_scale,
                    scale=thickness * arrow_scale, color=color, alpha=alpha)
-    arrow.look_at(Vec3(to_pos) * 100)
+    arrow.look_at(to_pos * 100)
 
     if set_light_off:
         line.set_light_off()

simulators/views/ursina_view.py

@@ -31,7 +31,7 @@ class UrsinaView(BodyView):
 
         :return:
         """
-        self.planet.turn()
+        self.planet.update()
 
     def appear(self):
         pass