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# 导入Manim核心库
from manim import *
# 导入Manim配置模块
import manim
# 动画场景类必须继承自Scene
class BoxAnimation ( Scene ) :
# construct方法是所有Manim动画的入口点
def construct ( self ) :
"""
创建并动画移动一个矩形
步骤：
1. 创建带样式的矩形
2. 分步骤进行位移动画
"""
# 创建矩形对象
box = Rectangle (
stroke_color = GREEN , # 边框颜色设置为绿色
stroke_opacity = 0.7 , # 边框透明度70%
fill_color = RED_B , # 填充颜色使用红色系B版本
fill_opacity = 0.5 , # 填充透明度50%
height = 1 , # 高度1个单位（ ）
width = 1 # 宽度1个单位
)
# 将矩形直接添加到场景（无动画）
self . add ( box )
# 第一个动画：
self . play ( box . animate . shift ( RIGHT * 2 ) , run_time = 2 )
# 第二个动画：
self . play ( box . animate . shift ( UP * 3 ) , run_time = 2 )
# 第三个动画： （ ）
self . play ( box . animate . shift ( DOWN * 5 + LEFT * 5 ) , run_time = 2 )
# 第四个动画：
self . play ( box . animate . shift ( UP * 1.5 + RIGHT * 1 ) , run_time = 2 )
