Python超人-宇宙模拟器

sim_scenes/featured/two_way_foil.py

+# -*- coding:utf-8 -*-
+# title           :三体二向箔场景模拟
+# description     :三体二向箔场景模拟
+# author          :Python超人
+# date            :2023-10-27
+# link            :https://gitcode.net/pythoncr/
+# python_version  :3.9
+# ==============================================================================
+import time
+
+from ursina import camera, application, lerp
+
+from bodies import Sun, Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto
+from common.celestial_data_service import get_init_pos_vels, init_bodies_pos_vels
+from common.consts import SECONDS_PER_WEEK, AU
+from common.image_utils import resize_image
+from objs import QuadObj, CircleObj, Obj
+from sim_scenes.func import camera_look_at, two_bodies_colliding, camera_move_control, get_run_speed_factor
+from sim_scenes.func import ursina_run, create_sphere_sky
+from sim_scenes.universe_sim_scenes import UniverseSimScenes
+from simulators.ursina.ursina_event import UrsinaEvent
+from simulators.func import ext_fun_for_method
+
+
+class TwoWayFoilSim(UniverseSimScenes):
+    """
+    三体二向箔场景模拟
+    """
+
+    def __init__(self):
+        self.current_stage = self.stage_01
+
+    def build_solar_system(self):
+        # region 构建太阳系
+        self.sun, self.mercury, self.venus, self.earth, self.mars, self.jupiter, \
+        self.saturn, self.uranus, self.neptune, self.pluto = \
+            Sun(size_scale=0.8e2, texture="sun_light.jpg"), \
+            Mercury(size_scale=2e3, distance_scale=1.5), \
+            Venus(size_scale=2e3, distance_scale=1.5), \
+            Earth(size_scale=2e3, distance_scale=1.5, rotate_angle=0), \
+            Mars(size_scale=2e3, distance_scale=1.4), \
+            Jupiter(size_scale=0.3e3, distance_scale=0.72), \
+            Saturn(size_scale=0.3e3, distance_scale=0.52), \
+            Uranus(size_scale=0.8e3, distance_scale=0.36), \
+            Neptune(size_scale=0.8e3, distance_scale=0.27), \
+            Pluto(size_scale=10e3, distance_scale=0.23)
+
+        self.bodies = [
+            self.sun, self.mercury, self.venus, self.earth, self.mars, self.jupiter,
+            self.saturn, self.uranus, self.neptune, self.pluto
+        ]
+        # endregion
+        # self.sun.glows = (2, 1.005, 0.01)
+        # # glows = (glow_num:10, glow_scale:1.03 glow_alpha:0.1~1)
+        # self.sun.glows = (0, 1.005, 0.1, 160)
+        self.sun.glows = (2, 1.005, 0.01)
+
+        self.two_way_foil_dt_factor = 1
+        self.sun.two_way_foil_dt = 0.003 * self.two_way_foil_dt_factor
+        self.saturn.two_way_foil_dt = 0.005 * self.two_way_foil_dt_factor
+        self.uranus.two_way_foil_dt = 0.002 * self.two_way_foil_dt_factor
+
+        init_bodies_pos_vels(self.bodies)
+
+    def build_two_way_foil(self):
+        """
+        创建二向箔（一个原始的方形二向箔，一个不断扩展的圆形二向箔）
+        @return:
+        """
+        # 原始的方形二向箔
+        self.two_way_foil = QuadObj(texture='two_way_foil.png',
+                                    # size_scale=4e7,
+                                    size_scale=1e7,
+                                    init_velocity=[0, -50, 60],
+                                    init_position=[0, 5 * AU, -6 * AU]) \
+            .set_light_disable(True).set_ignore_gravity(True)
+        # 不断扩展的圆形二向箔
+        self.two_way_foil_circle = CircleObj(texture="two_way_foil_circle.png",
+                                             size_scale=self.two_way_foil.size_scale * 2,
+                                             ) \
+            .set_light_disable(True).set_ignore_gravity(True)
+
+        self.bodies.append(self.two_way_foil)
+        self.bodies.append(self.two_way_foil_circle)
+
+    def build(self):
+        self.build_solar_system()
+        self.build_two_way_foil()
+
+    def on_ready(self):
+        """
+        事件绑定后，模拟器运行前会触发
+        @return:
+        """
+        # 创建天空
+        # camera.clip_plane_near = 0.1
+        camera.clip_plane_far = 1000000
+        create_sphere_sky(scale=200000)
+        application.time_scale = 5
+        # 圆形二向箔初始化（一开始不显示）
+        self.two_way_foil_circle.planet.rotation_x = 90
+        self.two_way_foil_circle.planet.enabled = False
+
+        def change_two_way_foil():
+            # 长方形膜状物，长八点五厘米，宽五点二厘米，比一张信用卡略大一些，极薄，看不出任何厚度。
+            # 封装状态下晶莹剔透、无色透明。待机模式下由于封装力场逐渐蒸发，会发出白光，使其表面呈纯白色，看上去就是一张纸条
+            self.two_way_foil.planet.scale_x = 8.5
+            self.two_way_foil.planet.scale_y = 5.2
+
+        glow_circle = self.sun.planet.glow_circle
+        fixed_star_ratio = glow_circle.scale_x / self.sun.planet.scale_x
+
+        def glow_circle_update():
+            glow_circle.enabled = self.sun.planet.enabled
+            glow_circle.position = self.sun.planet.position
+            glow_circle.scale_x = fixed_star_ratio * self.sun.planet.scale_y
+            if glow_circle.scale_x < 5:
+                glow_circle.update = lambda :None
+                glow_circle.enabled = False
+            glow_circle.scale_z = fixed_star_ratio * self.sun.planet.scale_x
+            # glow_circle.scale_z = fixed_star_ratio * fixed_star.scale_z
+            glow_circle.look_at(camera)
+
+        glow_circle.update = glow_circle_update
+
+        ext_fun_for_method(self.two_way_foil.planet, after_run_fun=change_two_way_foil)
+
+    def gen_pixcel_image(self, planet):
+        """
+        将纹理图改为像素图片
+        @param planet:
+        @return:
+        """
+        import os
+        if planet.texture is None:
+            return
+        in_img = str(planet.texture.path)
+        if "_pixcel" in in_img:
+            return
+        out_img = os.path.split(in_img)
+        out_file = out_img[1].split('.')
+        out_file = f'{out_file[0]}_pixcel.{out_file[1]}'
+        out_img = os.path.abspath(os.path.join(out_img[0], "temp", out_file))
+        if not os.path.exists(out_img):
+            resize_image(in_img, out_img, 50, 25)
+        from ursina import Texture
+        planet.texture = Texture(out_img)
+
+        return out_img
+
+    def flatten_animation(self, body):
+        """
+        天体二维化的动画
+        @param body: 天体
+        @return:
+        """
+
+        def flatten_update(planet):
+            def warp():
+                # 原始的 update 方法中有计算天体的运行
+                planet.init_update()
+
+                # 对Y轴进行压平动画，如果压平大小不足 1/50，则继续压缩，直到压缩到 1/50 就不压缩了
+                # （如果觉得 1/50 的厚度压的不够，还可以继续压缩，基本上就够了）
+                # if planet.scale_y_v > planet.init_scale_y / 50:
+                if planet.scale_y_v > 0.5:
+                    planet.scale_y_v /= 1.01
+                # else:
+                #     self.gen_pixcel_image(planet)
+                planet.scale_x_v += 0.05
+
+                # 灯光关闭，不然压到2纬就会是黑色
+                planet.set_light_off(True)
+                planet.scale_y = planet.scale_y_v
+                planet.scale_x = planet.scale_x_v
+                planet.scale_z = planet.scale_x_v
+
+            return warp
+
+        body.is_2d = True
+        # 压平时，转速将为以前的 1/200
+        body.planet.rotation_speed /= 200
+        # 记录原始的厚度大小
+        body.planet.scale_y_v = body.planet.scale_y
+        body.planet.init_scale_y = body.planet.scale_y
+
+        body.planet.scale_x_v = body.planet.scale_x
+        body.planet.init_scale_x = body.planet.scale_x
+        # 原始的 update 方法中有计算天体的运行，需要保留
+        body.planet.init_update = body.planet.update
+        # 替换 update
+        body.planet.update = flatten_update(body.planet)
+
+    def get_target(self):
+        for body in self.bodies:
+            if hasattr(body, "is_2d"):
+                continue
+            return body
+        return None
+
+    def stage_01(self):
+        """
+        二向箔飞向太阳
+        @return:
+        """
+
+        # 如果二向箔和太阳碰撞
+        if two_bodies_colliding(self.two_way_foil, self.sun):
+            # 隐藏原始二向箔，保持在原地，不在飞行
+            # self.two_way_foil.planet.enabled = False
+            self.two_way_foil.init_velocity = [0, 0, 0]
+
+            def two_way_foil_update():
+                target = self.get_target()
+
+                if target is self.sun:
+                    # 关闭太阳的光晕
+                    self.sun.hide_children()
+
+                # 让实体A朝向实体B
+                # self.two_way_foil.planet.look_at(target)
+                if target is not None:
+                    # 让实体A向着实体B移动
+                    dt = target.two_way_foil_dt if hasattr(target, "two_way_foil_dt") \
+                        else 0.003 * self.two_way_foil_dt_factor
+                    # current_time = time.time()
+                    # if current_time - self.two_way_foil.last_time >= 0.1:
+                    #     dt = dt * 2
+                    #     self.two_way_foil.last_time = current_time
+                    # target.two_way_foil_dt = dt
+                    self.two_way_foil.planet.position = \
+                        lerp(self.two_way_foil.planet.position, target.planet.position, dt)
+                else:
+                    self.two_way_foil.planet.enabled = False
+
+            self.two_way_foil.planet.update = two_way_foil_update
+            # 圆形二向箔显示并设置透明度为0.8
+            self.two_way_foil_circle.planet.alpha = 0.8
+            self.two_way_foil_circle.planet.enabled = True
+            # 当前阶段为 stage_02：二向箔压平天体的阶段
+            self.current_stage = self.stage_02
+
+    def stage_02(self):
+        """
+        二向箔压平天体（二维化）的阶段
+        @return:
+        """
+        self.two_way_foil.planet.enabled = False
+        # self.sun.two_dim.planet.init_scale += 0.05
+        # 圆形二向箔不断扩展变大
+        self.two_way_foil_circle.planet.init_scale += 0.8
+        # 调整天体二维化的时间，一般需要延时，保证扩展和二维化同步的真实效果
+        two_way_delay_times = [0.5,  # 太阳
+                               0.5, 0.8, 1.0,  # 水星 金星 地球
+                               1.2, 2.0, 3.0,  # 火星 木星 土星
+                               4.0, 4.5, 5.5]  # 天王星 海王星 冥王星
+        for idx, b in enumerate(self.bodies):
+            if isinstance(b, Obj):
+                # 二向箔不处理
+                continue
+            if hasattr(b, "two_way_time"):
+                # 二向箔和天体碰撞的时间不为空，则说明已经碰撞
+                if b.two_way_time is not None:
+                    # 如果碰撞后的延时时间到，则进行压平天体处理（二维化）
+                    if time.time() - b.two_way_time > two_way_delay_times[idx]:
+                        self.flatten_animation(b)
+                        # 二向箔和天体碰撞的时间设置为空，就是说明二维化结束
+                        b.two_way_time = None
+            elif two_bodies_colliding(self.two_way_foil_circle, b):
+                # 二向箔和天体碰撞，但暂时先不二维化，记下时间，延时二维化
+                b.two_way_time = time.time()
+
+        # 圆形二向箔不断旋转的效果
+        self.two_way_foil_circle.planet.rotation_z += 0.4
+
+    def on_timer_changed(self, time_data):
+        """
+
+        @param time_data:
+        @return:
+        """
+        # 原始方形二向箔飞行的翻转效果
+        if self.two_way_foil.planet.enabled:
+            self.two_way_foil.planet.rotation_x += 0.1
+            self.two_way_foil.planet.rotation_y += 1
+        # # 摄像机始终看向二向箔
+        # camera_look_at(self.two_way_foil)
+
+        target = self.get_target()
+        if target is not None:
+            if target is self.sun:
+                # 摄像机始终看向二向箔
+                camera_look_at(self.two_way_foil)
+            else:
+                # 摄像机始终看向二向箔
+                camera_look_at(self.two_way_foil)
+                camera.position += camera.forward*10
+        self.camera_move(time_data)
+                # camera.position = \
+                #     lerp(camera.position, target.planet.position, 0.001)
+
+        self.current_stage()
+
+    def s_f(self, value=1):
+        if value == 0:
+            return 0
+        return get_run_speed_factor() * value
+
+    def camera_move(self, time_data):
+        """
+        摄像机移动控制
+        @param dt:
+        @return:
+        """
+        # 摄像机移动控制数据
+        camera_move_infos = [
+            # 条件：年份
+            # 移动的信息：
+            # 按坐标系方向移动 x:右+左-, y:升+降-, z:前+(接近太阳)后-(远离太阳)
+            # 以摄像机视角移动 f:前 b:后 l:左 r:右 u:上 d:下
+            (1, {"l": 2}),
+            (10, {"f": 50}),
+            # (40, {"f": 80}),
+            # (1983, {"to": {"ct_id": 1, "t": 10}}),
+            # (2, {"x": 2, "y": -2, "z": -15}),
+            # (3, {"y": -6, "z": -12}),
+            # (4, {"y": -3, "z": -12}),
+            # (5, {"z": -8, "f": -5}),
+            # (6, {"z": -8, "f": -3}),
+            # (7, {"z": -8}),
+            # (8, {"z": -8, "y": -0.2}),
+            # (9, {}),
+            # (100, {"f": 10}),
+            # (200, {"f": 10}),
+            # (500, {"f": 10}),
+            # (2062, {"y": -3}),
+            # (2063, {"y": -10, "z": 2}),
+            (2181, {}),
+            # (2082, {"exit": True})
+        ]
+
+        camera_move_control(camera_move_infos,
+                            cond_cb=lambda ps: ps["next_cond"] > time_data.total_days >= ps["cond"],
+                            value_conv=self.s_f, smooth=None)
+
+
+if __name__ == '__main__':
+    """
+    三体二向箔场景模拟
+    """
+    sim = TwoWayFoilSim()
+    sim.build()
+    # 订阅事件后，上面2个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(sim.on_timer_changed)
+    # 运行前会触发 on_ready
+    UrsinaEvent.on_ready_subscription(sim.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 = 左-右+、上+下-、前+后-
+    ursina_run(sim.bodies,
+               SECONDS_PER_WEEK,
+               position=(0, 2 * AU, -11 * AU),
+               # position=(0, 5 * AU, -5 * AU),
+               cosmic_bg='',
+               bg_music='sounds/no_glory.mp3',
+               show_camera_info=False,
+               show_control_info=False,
+               timer_enabled=True,
+               show_timer=True,
+               show_grid=False)