太阳系三体模拟器

simulators/ursina_simulator.py

@@ -7,7 +7,7 @@
 # python_version  :3.8
 # ==============================================================================
 # pip install -i http://pypi.douban.com/simple/ --trusted-host=pypi.douban.com ursina
-from ursina import Ursina, window, Entity, Grid, Mesh, camera, color, mouse, Vec2, Vec3, load_texture, held_keys
+from ursina import Ursina, window, Entity, Grid, Mesh, camera, Text, application, color, mouse, Vec2, Vec3, load_texture, held_keys
 from ursina.prefabs.first_person_controller import FirstPersonController
 
 from simulators.views.ursina_view import UrsinaView, UrsinaPlayer
@@ -110,6 +110,32 @@ class UrsinaSimulator(Simulator):
                 self.cosmic_background(cosmic_bg)
 
         EditorCamera()
+
+        pause_handler = Entity(ignore_paused=True)
+
+        # 按空格键则暂停
+        def pause_handler_input(key):
+            time_scales = [1, 10, 20, 30]
+            if key == 'space':
+                application.paused = not application.paused  # Pause/unpause the game.
+            elif key == 'tab':
+                # application.time_scale 属性控制游戏时间流逝的速度。
+                # 具体来说，它是一个浮点数，用于调整游戏时间流逝速度的比例，其默认值为 1.0，表示正常速度。
+                # 当你将它设置为小于 1.0 的值时，游戏时间会变慢，而设置为大于 1.0 的值时，游戏时间则会变快。
+                for idx, time_scale in enumerate(time_scales):
+                    if int(application.time_scale) == time_scale:
+                        if idx < len(time_scales) - 1:
+                            application.time_scale = time_scales[idx + 1]
+                            break
+                        else:
+                            application.time_scale = 1
+                print(application.time_scale)
+
+        pause_handler.input = pause_handler_input
+        # 加载中文字体文件
+        Text.default_font = 'simsun.ttc'
+        key_info_str = "方位控制[QWEASD + 鼠标] 暂停控制[空格] 移动速度[Tab]"
+        key_info = Text(text=key_info_str, position=(-0.8, 0.5), origin=(-1, 1), background=True)
         self.app.run()