From 19492412ecfaf964009114ac7d8c8e260797d7d1 Mon Sep 17 00:00:00 2001
From: march3 <gang.wei@qq.com>
Date: Tue, 14 Nov 2023 13:12:03 +0800
Subject: [PATCH] =?UTF-8?q?Python=E8=B6=85=E4=BA=BA-=E5=AE=87=E5=AE=99?=
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---
 objs/halley_comet.py                 |  2 +-
 simulators/ursina/entities/planet.py | 26 +++++++++++++++++++++-----
 2 files changed, 22 insertions(+), 6 deletions(-)

diff --git a/objs/halley_comet.py b/objs/halley_comet.py
index 04478d3..c20c63d 100644
--- a/objs/halley_comet.py
+++ b/objs/halley_comet.py
@@ -50,7 +50,7 @@ class HalleComet(RockSnow):
         super().__init__(**params)
         # create_cone(radius, height, subdivisions, r=0.1)
         # self.comet_info = (0.18, 2.0, 100, 0.2)
-        self.comet_info = (0.07, 0.20, 2, 100)
+        self.comet_info = (0.07, 0.20, 2, 20)
 
 
 from ursina.prefabs.primitives import Shader
diff --git a/simulators/ursina/entities/planet.py b/simulators/ursina/entities/planet.py
index df3db86..7e31b69 100644
--- a/simulators/ursina/entities/planet.py
+++ b/simulators/ursina/entities/planet.py
@@ -8,7 +8,8 @@
 # ==============================================================================
 # pip install -i http://pypi.douban.com/simple/ --trusted-host=pypi.douban.com ursina
 from ursina import application, Entity, camera, color, Vec3, Text, load_texture, destroy, PointLight
-
+import time
+import random
 from common.image_utils import find_texture
 from simulators.ursina.entities.entity_utils import create_name_text, create_trails, clear_trails, create_rings, \
     trail_init, create_fixed_star_lights
@@ -191,7 +192,7 @@ class Planet(Entity):
         comet_num = 2
         for i in range(1, comet_num):
             c = Entity(parent=self.comet_trail, model=create_comet_trail(*comet_info),
-                       texture=texture, scale=1 + i * 0.01,
+                       texture=texture, scale=1 + i * 0.02,
                        position=(0, 0, 0),
                        rotation=(0, 0, 0), double_sided=True, alpha=1)
             c.set_light_off()
@@ -200,6 +201,11 @@ class Planet(Entity):
         # self.comet_sphere = Entity(parent=self, model="sphere", texture="",
         #                            color=color.white, scale=2.2, double_sided=True, alpha=0.6)
         def set_alpha(alpha):
+            """
+            设置尾巴的透明度
+            @param alpha:
+            @return:
+            """
             self.comet_trail.enabled = (alpha > 0.01)
             if self.comet_trail.enabled:
                 self.comet_trail.alpha = alpha / 2
@@ -210,17 +216,27 @@ class Planet(Entity):
             # self.comet_sphere.alpha = alpha
 
         def comet_trail_update():
-            import random
+            """
+            通过更新尾巴的旋转值，模拟尾巴的动画
+            @return:
+            """
+            if application.paused:
+                return
+            # 1秒钟更新一次，效果就可以了
+            if time.time() - comet_trail_update.last_time >= 1:
+                comet_trail_update.last_time = time.time()
+
             # self.comet_trail.rotation_x += 1
             for c in self.comet_trail.children:
                 c.rotation_y += (random.randint(-20, 20) / 10)
 
         self.comet_trail.set_alpha = set_alpha
         self.comet_trail.update = comet_trail_update
-        # set_alpha(0.8)
+
+        comet_trail_update.last_time = time.time()
         # 设置行星环不受灯光影响，否则看不清行星环
         self.comet_trail.set_light_off()
-        # self.comet_sphere.set_light_off()
+
 
     def create_rotate_entity(self):
         """
-- 
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