Python超人-宇宙模拟器

bodies/fixed_stars/fixed_star.py

@@ -74,9 +74,9 @@ class FixedStar(Body):
         # save_file = os.path.join(temp_dir, "%s_%s.png" % (texture_name, "_".join([str(i) for i in list(self.color)])))
 
         save_file = os.path.join(temp_dir, "%s_%s.png" % (texture_name, str(self.__class__.__name__).lower()))
-        
-        if os.path.exists(save_file):
-            return save_file
+        if self.__class__ is not FixedStar:
+            if os.path.exists(save_file):
+                return save_file
 
         fixed_star_img = os.path.join(texture_path, texture)
         gen_fixed_star_texture(self.color,

sim_scenes/funny/china_earth.py

+# -*- coding:utf-8 -*-
+# title           :组成文本的星球群（自定义星球）
+# description     :组成文本的星球群（自定义星球）
+# author          :Python超人
+# date            :2023-03-26
+# link            :https://gitcode.net/pythoncr/
+# python_version  :3.8
+# ==============================================================================
+from bodies import FixedStar, ColorBody, Earth, Sun
+from common.consts import SECONDS_PER_HOUR, SECONDS_PER_DAY, SECONDS_PER_WEEK
+from sim_scenes.func import ursina_run, create_sphere_sky
+from sim_scenes.funny.utils.body_utils import gen_bodies_from_image
+from simulators.ursina.ursina_event import UrsinaEvent
+
+D = 6000  # 基本距离单位:km（随意赋值）
+
+
+def create_earth(name, texture, scale):
+    earth = Earth(name=name, texture=texture, rotate_angle=-23.44,
+                  mass=2e32, size_scale=5 * scale,
+                  init_position=[-450 * D, 100 * D, 6000 * D],  # [ 左-右+, 上+下-, 远+近- ]
+                  init_velocity=[0, 0, 0],
+                  ignore_mass=True)
+    return earth
+
+
+def show_text_bodies():
+    """
+    显示图片文本的星球群
+    """
+
+    # 观看摄像机的位置
+    # camera_pos = (左-右+, 上+下-, 前+后-)
+    camera_pos = (D, D, -3000 * D)
+    # 根据 pixel_image 指定图片生成有色星球（注意：图片的像素不要太多）
+    bodies = gen_bodies_from_image(
+        pixel_image="./images/ilovechina.png",
+        texture="color_moon.png",
+        params={"camera_pos": camera_pos}, light_disable=False)
+
+    # 放一个恒星作为背景
+    # TODO: ignore_mass=True
+    #  注意：这里的算法是基于牛顿的万有引力（质量为0不受引力的影响在天体物理学中是不严谨）
+    sun = FixedStar(init_position=[camera_pos[0], camera_pos[1], camera_pos[2] * 30],
+                    texture="fixed_star.png", color=(255, 255, 225), size_scale=20)
+    # glows = (glow_num:10, glow_scale:1.03 glow_alpha:0.1~1 glow_color_min_val)
+    sun.glows = (10, 1.05, 0.1)
+    bodies.append(sun)
+
+    earth = create_earth(name="背景地球", texture="earth-huge.jpg", scale=1)
+    earth_cn = create_earth(name="背景地球", texture="earth-huge-cn-flag.png", scale=1.01)
+    earth_clouds = create_earth(name="地球云层", texture="transparent_clouds.png", scale=1.005)
+
+    bodies.append(earth)
+    bodies.append(earth_cn)
+    bodies.append(earth_clouds)
+
+    def on_ready():
+        # from simulators.ursina.entities.entity_utils import create_directional_light
+        # # 运行前触发
+        # # 为了较好的立体效果，可以增加太阳光线，光线指向木星（target=jupiter）
+        # create_directional_light(position=(200, 0, -300), light_num=3, target=earth)
+        from ursina import camera
+        # camera.fov = 40
+        sky = create_sphere_sky(scale=800000)
+        sky.rotation_y = 180
+        # sky.rotation_x = 20
+        # sky.rotation_z = -65
+
+    UrsinaEvent.on_ready_subscription(on_ready)
+    # 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 = camera_pos = (左-右+, 上+下-, 前+后-)
+    ursina_run(bodies, SECONDS_PER_HOUR,
+               cosmic_bg='',
+               show_grid=False,
+               position=camera_pos, view_closely=True)
+
+
+if __name__ == '__main__':
+    show_text_bodies()

sim_scenes/funny/utils/body_utils.py

@@ -29,7 +29,7 @@ def get_scaled_body_pos(camera_pos, body_pos, scale_factor):
     return new_pos
 
 
-def gen_bodies_from_image(pixel_image, params, texture="color_body.png"):
+def gen_bodies_from_image(pixel_image, params, texture="color_body.png", light_disable=True):
     """
     根据像素图片以及参数，自动生成星球，注意图片像素不能太多，否则会导致电脑运行太慢
     @param pixel_image:
@@ -63,7 +63,7 @@ def gen_bodies_from_image(pixel_image, params, texture="color_body.png"):
     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([-%g * D, %g * D, 0], %.4f), ' \
-                    f'init_velocity=[0, 0, 0], ignore_mass=True, texture="{texture}").set_light_disable(True)'
+                    f'init_velocity=[0, 0, 0], ignore_mass=True, texture="{texture}").set_light_disable({light_disable})'
     bodies_str = "["
 
     # 以图片像素为坐标，对角线的距离