Python超人-宇宙模拟器

sim_scenes/earth/earth_3d.py

+# -*- coding:utf-8 -*-
+# title           :地球3D效果
+# description     :地球3D效果
+# author          :Python超人
+# date            :2023-05-01
+# link            :https://gitcode.net/pythoncr/
+# python_version  :3.8
+# ==============================================================================
+from bodies import Earth
+from common.consts import SECONDS_PER_HOUR, SECONDS_PER_DAY
+from sim_scenes.func import ursina_run, camera_look_at
+from simulators.ursina.entities.body_timer import TimeData
+from simulators.ursina.ursina_event import UrsinaEvent
+
+if __name__ == '__main__':
+    """
+    地球3D效果
+    """
+    # 创建带有云层的地球
+    earth = Earth(texture="earth_hd_trans.png",
+                  rotate_angle=-23.44,
+                  init_position=[0, 0, 0],
+                  init_velocity=[0, 0, 0],
+                  size_scale=1)
+    # 创建云层（texture纹理图使用了透明云层的图片，云层的 size_scale 要稍微比地球大一点）
+    clouds = Earth(name="地球云层", texture="transparent_clouds.png",
+                   rotate_angle=-23.44,
+                   size_scale=1.001, parent=earth)
+
+    bodies = [earth, clouds]
+
+
+    def on_ready():
+        from ursina import camera
+        # camera_look_at(earth, rotation_z=0)
+        # camera.fov = 40
+
+
+    def on_timer_changed(time_data: TimeData):
+        pass
+
+
+    # 运行前会触发 on_ready
+    UrsinaEvent.on_ready_subscription(on_ready)
+    # 订阅事件后，上面的函数功能才会起作用
+    # 运行中，每时每刻都会触发 on_timer_changed
+    UrsinaEvent.on_timer_changed_subscription(on_timer_changed)
+
+    # 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 / 2,
+               position=(1.2 * earth.radius, 0, -30000),
+               show_grid=False,
+               cosmic_bg="none",
+               view_closely=0.001)  # 近距离观看 view_closely=True或0.001