mobjects

# Manim 中的 Mobjects Mobjects（数学对象）是 Manim 动画的构建块。它们代表了屏幕上可以显示的任何内容。 ## 基本形状 python from manim import * class BasicShapes(Scene): def construct(self): # 圆形 circle = Circle(radius=1, color=BLUE) circle.set_fill(BLUE, opacity=0.5) # 正方形 square = Square(side_length=2, color=RED) # 矩形 rectangle = Rectangle(width=3, height=1.5, color=GREEN) # 显示它们 self.play(Create(circle)) self.play(Create(square)) self.play(Create(rectangle)) ## 常用 Mobjects ### 几何形状 python class GeometricShapes(Scene): def construct(self): # 基本形状 circle = Circle() square = Square() triangle = Triangle() pentagon = RegularPolygon(n=5) # 排成一行 shapes = VGroup(circle, square, triangle, pentagon) shapes.arrange(RIGHT, buff=0.5) self.play(Create(shapes)) ### 线条与箭头 python class LinesAndArrows(Scene): def construct(self): # 线条 line = Line(start=LEFT, end=RIGHT, color=BLUE) # 箭头 arrow = Arrow(start=LEFT, end=RIGHT, color=RED) # 双向箭头 double_arrow = DoubleArrow(start=LEFT * 2, end=RIGHT * 2) # 向量 vector = Vector(direction=UP + RIGHT) arrows = VGroup(line, arrow, double_arrow, vector) arrows.arrange(DOWN, buff=0.5) self.play(Create(arrows)) ## Mobject 属性 ### 颜色与透明度 python class ColorOpacity(Scene): def construct(self): circle = Circle() # 设置描边颜色 circle.set_stroke(color=BLUE, width=5) # 设置填充 circle.set_fill(RED, opacity=0.7) self.play(Create(circle)) ### 大小与位置 python class SizePosition(Scene): def construct(self): square = Square() # 缩放 square.scale(2) # 移动 square.shift(UP * 2 + RIGHT * 3) # 旋转 square.rotate(PI / 4) self.play(Create(square)) ## 文本与 LaTeX python class TextExample(Scene): def construct(self): # 普通文本 text = Text("Hello, Manim!") # LaTeX 文本 formula = MathTex(r"e^{ipi} + 1 = 0") # 方程 equation = Tex(r"The famous equation: $E = mc^2$") group