From 71ab2bba1a331ec904b50cd9789304a5d3a0f6bf Mon Sep 17 00:00:00 2001
From: march3 <gang.wei@qq.com>
Date: Sat, 17 Jun 2023 15:11:41 +0800
Subject: [PATCH] =?UTF-8?q?Python=E8=B6=85=E4=BA=BA-=E5=AE=87=E5=AE=99?=
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---
 .../solar_system/solarsystem_planets_size.py  | 41 ++++++++++++-------
 1 file changed, 26 insertions(+), 15 deletions(-)

diff --git a/sim_scenes/solar_system/solarsystem_planets_size.py b/sim_scenes/solar_system/solarsystem_planets_size.py
index 2772b65..79828a9 100644
--- a/sim_scenes/solar_system/solarsystem_planets_size.py
+++ b/sim_scenes/solar_system/solarsystem_planets_size.py
@@ -10,24 +10,26 @@ from bodies import Sun, Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Ne
 from common.consts import SECONDS_PER_HOUR, SECONDS_PER_DAY, AU
 from sim_scenes.func import mayavi_run, ursina_run
 from simulators.ursina.entities.body_timer import TimeData
+from simulators.ursina.entities.entity_utils import create_directional_light
 from simulators.ursina.ursina_event import UrsinaEvent
 
-
+# 可以调整整体放大倍数 ，比例会保持不变
+FACTOR = 10
 # 地球和月球之间的距离常量，距地距离约: 363104 至 405696 km，平均距离 384000 km
-E_M_DISTANCE = 405696
-earth = Earth("地球", init_position=[0, 0, 0])
-moon = Moon("月球", init_position=[E_M_DISTANCE, 0, 0])
+E_M_DISTANCE = 405696 * FACTOR
+earth = Earth("地球", size_scale=FACTOR, init_position=[0, 0, 0])
+moon = Moon("月球", size_scale=FACTOR, init_position=[E_M_DISTANCE, 0, 0])
 
 bodies = [
     earth, moon,
-    Mercury(name="水星"),
-    Venus(name="金星"),
-    Mars(name="火星"),
-    Jupiter(name="木星"),
-    Saturn(name="土星").show_rings(False),
-    Uranus(name="天王星"),
-    Neptune(name="海王星"),
-    Pluto(name="冥王星")
+    Mercury(name="水星", size_scale=FACTOR),
+    Venus(name="金星", size_scale=FACTOR),
+    Mars(name="火星", size_scale=FACTOR),
+    Jupiter(name="木星", size_scale=FACTOR),
+    Saturn(name="土星", size_scale=FACTOR).show_rings(False),
+    Uranus(name="天王星", size_scale=FACTOR),
+    Neptune(name="海王星", size_scale=FACTOR),
+    Pluto(name="冥王星", size_scale=FACTOR)
 ]
 
 # 从第三个星球（水星）开始
@@ -35,14 +37,21 @@ index = 2
 last_total_hours = 0
 
 if __name__ == '__main__':
-    last_diameter = earth.diameter / 2
+    last_diameter = earth.diameter * FACTOR / 2
     plant_positions = []
     for i, body in enumerate(bodies):
         body.ignore_mass = True
         body.init_velocity = [0, 0, 0]
         if i >= 2:  # 从第三个星球（水星）开始
-            plant_positions.append([(body.diameter / 2) + last_diameter, 0, 0])
-            last_diameter += body.diameter
+            plant_positions.append([(body.diameter * FACTOR / 2) + last_diameter, 0, 0])
+            last_diameter += body.diameter * FACTOR
+
+
+    def on_ready():
+        # 运行前触发
+        # 为了较好的立体效果，可以增加太阳光线，光线直射地球（target=earth）
+        create_directional_light(position=(E_M_DISTANCE / 2, 0, -E_M_DISTANCE * 100), light_num=3, target=earth)
+
 
     def on_timer_changed(time_data: TimeData):
         global index, last_total_hours
@@ -58,6 +67,8 @@ if __name__ == '__main__':
 
     # 运行中，每时每刻都会触发 on_timer_changed
     UrsinaEvent.on_timer_changed_subscription(on_timer_changed)
+    # 运行前会触发 on_ready
+    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
-- 
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