【Manim CE】常用Mobject

当前文档版本：v0.16.0.post0

VMobject

---

继承自Mobject

V的意思是向量化的，vectorized mobject

fill_color=None,

fill_opacity=0.0,

stroke_color=None,

stroke_opacity=1.0,

stroke_width=DEFAULT_STROKE_WIDTH,

background_stroke_color=BLACK,

background_stroke_opacity=1.0,

background_stroke_width=0,

sheen_factor=0.0,

sheen_direction=UL,

close_new_points=False,

pre_function_handle_to_anchor_scale_factor=0.01,

make_smooth_after_applying_functions=False,

background_image=None,

shade_in_3d=False,

tolerance_for_point_equality=1e-6,

n_points_per_cubic_curve=4,

**kwargs

构造参数：

• fill_color 填充颜色
• fill_opacity 填充透明度
• stroke_color 边框颜色
• stroke_opacity 边框颜色透明度
• stroke_width 边框宽度
  • 注：DEFAULT_STROKE_WIDTH = 4
• background_stroke_color
• background_stroke_opacity
• background_stroke_width
• sheen_factor 物体的光泽
• sheen_direction 物体光泽的中心
• close_new_points Indicates that it will not be displayed, but that it should count in parent mobject’s path
• ...

几何

---

Circle 圆

manim.mobject.geometry.arc.Circle

radius: float | None = None,

color: Color | str = RED,

**kwargs,

构造参数：

• radius（float或None）圆的半径，例如 1
• color（str或Color）圆形的颜色，例如 WHITE
• kwargs 附加参数

构造示例：

from manim import *

class CircleExample(Scene):
    def construct(self):
        circle_1 = Circle(radius=1.0)
        circle_2 = Circle(radius=1.5, color=GREEN)
        circle_3 = Circle(radius=1.0, color=BLUE_B, fill_opacity=1)

        circle_group = Group(circle_1, circle_2, circle_3).arrange(buff=1)
        self.add(circle_group)

Dot 点

manim.mobject.geometry.arc.Dot

point: list | np.ndarray = ORIGIN,

radius: float = DEFAULT_DOT_RADIUS,

stroke_width: float = 0,

fill_opacity: float = 1.0,

color: Color | str = WHITE,

构造参数：

• point（数组）屏幕坐标，例如 [0,0,0]
• radius（float）点的半径，例如 0.05
• stroke_width （float）点的轮廓宽度，例如 0.01
• fill_opacity（float）点内部的颜色，例如 YELLOW
• kwargs 附加参数

构造示例：

from manim import *

class DotExample(Scene):
    def construct(self):
        dot1 = Dot(point=LEFT, radius=0.08)
        dot2 = Dot(point=ORIGIN)
        dot3 = Dot(point=RIGHT)
        self.add(dot1,dot2,dot3)

Ellipse 椭圆

manim.mobject.geometry.arc.Ellipse

width: float = 2,

height: float = 1,

**kwargs

构造参数：

• width（float）短轴
• height（float）长轴
• kwargs 附加参数

构造示例：

from manim import *

class EllipseExample(Scene):
    def construct(self):
        ellipse_1 = Ellipse(width=2.0, height=4.0, color=BLUE_B)
        ellipse_2 = Ellipse(width=4.0, height=1.0, color=BLUE_D)
        ellipse_group = Group(ellipse_1,ellipse_2).arrange(buff=1)
        self.add(ellipse_group)

Angle 角

manim.mobject.geometry.line.Angle

line1: Line,

line2: Line,

radius: float = None,

quadrant=(1, 1),

other_angle: bool = False,

dot=False,

dot_radius=None,

dot_distance=0.55,

dot_color=WHITE,

elbow=False,

**kwargs,

构造参数：

• line1（Line）起始线
  • 注：Line可以视为两个点坐标的集合，两点连成的线段。
• line2（Line）终止线
  • 注：line1、line2两条线不能平行
• radius（float）原点与角度弧线的距离半径
• quadrant 角度弧线的象限，可传入:(1,1) (1,-1) (-1,1) (-1,-1)
• other_angle（bool）从正方向画角度弧线
• dot（bool）弧度中心标记一个点，一般用于表示角度位置
• dot_radius（float）点的半径
• dot_distance（float）点离原点的距离
• elbow（bool）表示直角的角度折现
• kwargs 附加参数

构造示例：

from manim import *

class RightArcAngleExample(Scene):
    def construct(self):
        line1 = Line( LEFT, RIGHT )
        line2 = Line( DOWN, UP )
        rightarcangles = [
            Angle(line1, line2, dot=True),
            Angle(line1, line2, radius=0.4, quadrant=(1,-1), dot=True, other_angle=False),
            Angle(line1, line2, radius=0.5, quadrant=(-1,1), stroke_width=8, dot=True, dot_color=YELLOW, dot_radius=0.04, other_angle=True),
            Angle(line1, line2, radius=0.7, quadrant=(-1,-1), color=RED, dot=True, dot_color=GREEN, dot_radius=0.08),
        ]
        plots = VGroup()
        for angle in rightarcangles:
            plot=VGroup(line1.copy(),line2.copy(), angle)
            plots.add(plot)
        plots.arrange(buff=1.5)
        self.add(plots)

Line 线

manim.mobject.geometry.line.Line

start=LEFT,

end=RIGHT,

buff=0,

path_arc=None,

**kwargs

构造参数：

• start（list）起始点
• end（list）终点
• buff（float）两端点与可见线的距离
• kwargs 附加参数

构造示例：

from manim import *

class LineExample(Scene):
    def construct(self):
        ax = Axes()
        line1 = Line(ax.c2p(1,-3),ax.c2p(1,3),buff=0)
        line2 = Line(ax.c2p(2,-3),ax.c2p(2,3),buff=1)
        line3 = Line(ax.c2p(2,-3),ax.c2p(2,3),path_arc=PI)
        self.add(ax,line1,line2,line3)