Python超人-宇宙模拟器

sim_scenes/solar_system/halley_comet_sim.py

@@ -14,7 +14,7 @@ from common.celestial_data_service import init_bodies_reality_pos_vels, conv_to_
 from common.consts import SECONDS_PER_YEAR, AU
 from common.func import calculate_distance
 from objs import HalleComet
-from sim_scenes.func import create_text_panel
+from sim_scenes.func import create_text_panel, camera_look_at
 from sim_scenes.func import ursina_run, create_sphere_sky
 from sim_scenes.solar_system.halley_comet_lib import HalleyCometSimBase, HalleyCometParams, \
     create_halley_comet, create_orbit_line
@@ -63,10 +63,11 @@ class HalleyCometSim(HalleyCometSimBase):
         # 创建天空
         create_sphere_sky(scale=200000)
         # UrsinaConfig.trail_type = "curve_line"
-        # UrsinaConfig.trail_thickness_factor = 3
+        # UrsinaConfig.trail_length = 300
         UrsinaConfig.trail_type = "line"
-        UrsinaConfig.trail_thickness_factor = 3
         UrsinaConfig.trail_length = 152
+        UrsinaConfig.trail_thickness_factor = 5
+
         # UrsinaConfig.trail_length = 180
         UrsinaConfig.trail_factor = 3
         # camera.clip_plane_near = 0.1
@@ -111,7 +112,7 @@ class HalleyCometSim(HalleyCometSimBase):
         t = self.start_time + time_data.total_days
         set_solar_system_celestial_position(self.bodies, t, False)
 
-    def create_year_label(self, trail, year, halley_comet_pos):
+    def create_year_label(self, trail, year, halley_comet_pos=None, pos=None, scale=40, background=False):
         """
         在界面上创建年份的标签
         @param trail:
@@ -119,11 +120,18 @@ class HalleyCometSim(HalleyCometSimBase):
         @param halley_comet_pos:
         @return:
         """
+        # 为了不影响 2023年12月9日的显示，附近的 Label 就不显示
+        if year in ["1986", "2061", "2023", "2024", "2025"]:
+            return
+
         if trail is None:
-            pos = halley_comet_pos
+            _pos = halley_comet_pos
         else:
-            pos = (0, 0, 0)
-        label = create_label(trail, label=year, pos=pos, color=(255, 255, 255), scale=40, alpha=1.0)
+            _pos = pos
+        if _pos is None:
+            _pos = (0, 0, 0)
+        label = create_label(trail, label=year, pos=_pos, color=(255, 255, 255), scale=scale, alpha=1.0,
+                             background=background)
         label.set_light_off()
 
     def set_comet_trail_alpha(self, distance_sun):
@@ -150,6 +158,23 @@ class HalleyCometSim(HalleyCometSimBase):
         c = self.halley_comet.planet.children[0]
         c.alpha = alpha
 
+    def show_milestone_lable(self, last_trail, dt):
+        """
+        远日点: 35.1 AU（2023年12月9日）
+        近日点: 0.586 AU 上次通过近日点：1986年2月9日 下次通过近日点：2061年7月28日
+        @param last_trail:
+        @param dt:
+        @return:
+        """
+        milestones = ["1986-02-09", "2023-12-09", "2061-07-28"]
+        for milestone in milestones:
+            prop_name = f"milestone_{milestone}"
+            if not hasattr(self, prop_name) and dt.strftime("%Y-%m-%d") >= milestone:
+                setattr(self, prop_name, milestone)
+                self.create_year_label(last_trail, milestone, pos=(0, 2, 0), scale=100, background=True)
+                application.paused = True
+                UrsinaEvent.on_pause()
+
     def on_timer_changed(self, time_data):
         """
 
@@ -159,6 +184,8 @@ class HalleyCometSim(HalleyCometSimBase):
         dt = time_data.get_datetime(str(self.start_time))
         year = dt.strftime("%Y")
 
+        camera_look_at(self.halley_comet)
+
         if hasattr(self, "halley_comet"):
             if self.halley_comet.planet.enabled:
                 self.halley_comet.planet.look_at(self.sun.planet)
@@ -177,7 +204,9 @@ class HalleyCometSim(HalleyCometSimBase):
 
                 import copy
 
-                if not hasattr(self, "last_year"):
+                if self.show_milestone_lable(last_trail, dt):
+                    pass
+                elif not hasattr(self, "last_year"):
                     self.create_year_label(last_trail, year, pos)
                 elif self.last_year != year:
                     if not hasattr(self, "last_label_pos"):
@@ -272,7 +301,8 @@ if __name__ == '__main__':
     ursina_run(sim.bodies,
                SECONDS_PER_YEAR,
                # position=(0, 2 * AU, -11 * AU),
-               position=(0, 0.5 * AU, -5 * AU),
+               # position=(0, 0.5 * AU, -5 * AU),
+               position=(0, AU, -20 * AU),
                cosmic_bg='',
                show_trail=True,
                # bg_music='sounds/no_glory.mp3',

simulators/ursina/ursina_mesh.py

@@ -194,14 +194,14 @@ def create_arrow(height=0.5, width=0.1):
     return arrow_mesh
 
 
-def create_label(parent, label, pos, color, scale=50, alpha=1.0):
+def create_label(parent, label, pos, color, scale=50, alpha=1.0, background=False):
     if isinstance(color, tuple) or isinstance(color, list):
         color = conv_to_vec4_color(color)
     if alpha < 1:
         color[3] = alpha
     text = Text(label, parent=parent, scale=scale, billboard=True, color=color,
                 position=Vec3(pos) + Vec3(1, 1, 1), alpha=alpha,
-                font=UrsinaConfig.CN_FONT, background=False)
+                font=UrsinaConfig.CN_FONT, background=background)
     return text