Atlas-of-Control-and-AI/src/site/notes/Mobjects.md at 38b2ef95a985aea37a69a51092d2872bb657bbda · UNLINEARITY/Atlas-of-Control-and-AI

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Mobjects are the basic building blocks for all manim animations.

任何可以在屏幕上显示的对象都是 mobject，即使它本质上不一定是数学的。 Any object that can be displayed on the screen is a mobject, even if it is not necessarily mathematical in nature.

一、创建和显示 Creating and displaying mobjects

To display a mobject on the screen, call the add() method of the containing Scene. To remove a mobject from the screen, simply call the remove() method from the containing Scene

from manim import *
class CreatingMobjects(Scene):
    def construct(self):
        circle = Circle()
        self.add(circle)
        self.wait(1)
        self.remove(circle)
        self.wait(1)

二、放置 Placing mobjects

By default, mobjects are placed at the center of coordinates, or origin, when they are first created. They are also given some default colors.

放置方法：Placing method

shift() 初始化对象位置时，确认放置的位置 the Shapes scene places the mobjects by using the shift () method

move_to() 将对象移动到相对于原点的位置 uses absolute units , measured relative to the ORIGIN

next_to() uses relative units , measured from the mobject passed as the first argument.

align_to() as a way to determine the border to use for alignment，作为确定用于对齐的边框的一种方式

# 初始位置设置
circle=Circle()
circle.shift(ORIGN/UP/DOWN/LEFT/RIGHT)
#  UP/DOWN/LEFT/RIGHT 上、下、左、右单位向量
square1=Square().move_to(UP*2)
square2=Square().next_to(circle,UP*2)
triangle=Triangle().align_to(circle, LEFT)

Module Attributes

位置常量

Constant	definitions
`ORIGIN`	The center of the coordinate system.
`UP`	One unit step in the positive Y direction.
`DOWN`	One unit step in the negative Y direction.
`RIGHT`	One unit step in the positive X direction.
`LEFT`	One unit step in the negative X direction.
`IN`	One unit step in the negative Z direction.
`OUT`	One unit step in the positive Z direction.
`UL`	One step up plus one step left.
`UR`	One step up plus one step right.
`DL`	One step down plus one step left.
`DR`	One step down plus one step right.

常量	值	含义
`RIGHT`	`np.array([1, 0, 0])`	世界坐标系 +X
`LEFT`	`np.array([-1, 0, 0])`	世界坐标系 -X
`UP`	`np.array([0, 1, 0])`	世界坐标系 +Y
`DOWN`	`np.array([0, -1, 0])`	世界坐标系 -Y
`IN`	`np.array([0, 0, -1])`	世界坐标系 -Z（指向屏幕里）
`OUT`	`np.array([0, 0, 1])`	世界坐标系 +Z（指向屏幕外）

三、改变样式 Styling mobjects

set_stroke() changes the visual style of the mobject’s border 改变边界

set_fill() changes the style of the interior 改变填充

set_fill(_color=None_, opacity=None, family=True)

color (ParsableManimColor | None) – Fill color of the VMobject.
opacity (float | None) – Fill opacity of the VMobject.默认情况下，大多数 mobject 具有完全透明的内部，因此必须指定 opacity 参数才能显示颜色。不透明度为 1.0 表示完全不透明，而 0.0 表示完全透明。
family (bool) – If True, the fill color of all submobjects is also set.

circle.set_stroke(color= COLOR, width= )  # 设置线条
circle.set_fill(COLOR, opacity= )   # 设置填充

COLOR	支持的[[颜色\|颜色]]
`ManimColor`	Internal representation of a color.
`HSV`	HSV Color Space
`RGBA`	RGBA Color Space

Color Name	RGB Hex Code	Color Name	RGB Hex Code
`BLACK`	`#000000`	`BLUE`	`#58C4DD`
`BLUE_A`	`#C7E9F1`	`BLUE_B`	`#9CDCEB`
`BLUE_C`	`#58C4DD`	`BLUE_D`	`#29ABCA`
`BLUE_E`	`#236B8E`	`DARKER_GRAY`	`#222222`
`DARKER_GREY`	`#222222`	`DARK_BLUE`	`#236B8E`
`DARK_BROWN`	`#8B4513`	`DARK_GRAY`	`#444444`
`DARK_GREY`	`#444444`	`GOLD`	`#F0AC5F`
`GOLD_A`	`#F7C797`	`GOLD_B`	`#F9B775`
`GOLD_C`	`#F0AC5F`	`GOLD_D`	`#E1A158`
`GOLD_E`	`#C78D46`	`GRAY`	`#888888`
`GRAY_A`	`#DDDDDD`	`GRAY_B`	`#BBBBBB`
`GRAY_BROWN`	`#736357`	`GRAY_C`	`#888888`
`GRAY_D`	`#444444`	`GRAY_E`	`#222222`
`GREEN`	`#83C167`	`GREEN_A`	`#C9E2AE`
`GREEN_B`	`#A6CF8C`	`GREEN_C`	`#83C167`
`GREEN_D`	`#77B05D`	`GREEN_E`	`#699C52`
`GREY`	`#888888`	`GREY_A`	`#DDDDDD`
`GREY_B`	`#BBBBBB`	`GREY_BROWN`	`#736357`
`GREY_C`	`#888888`	`GREY_D`	`#444444`
`GREY_E`	`#222222`	`LIGHTER_GRAY`	`#DDDDDD`
`LIGHTER_GREY`	`#DDDDDD`	`LIGHT_BROWN`	`#CD853F`
`LIGHT_GRAY`	`#BBBBBB`	`LIGHT_GREY`	`#BBBBBB`
`LIGHT_PINK`	`#DC75CD`	`LOGO_BLACK`	`#343434`
`LOGO_BLUE`	`#525893`	`LOGO_GREEN`	`#87C2A5`
`LOGO_RED`	`#E07A5F`	`LOGO_WHITE`	`#ECE7E2`
`MAROON`	`#C55F73`	`MAROON_A`	`#ECABC1`
`MAROON_B`	`#EC92AB`	`MAROON_C`	`#C55F73`
`MAROON_D`	`#A24D61`	`MAROON_E`	`#94424F`
`ORANGE`	`#FF862F`	`PINK`	`#D147BD`
`PURE_BLUE`	`#0000FF`	`PURE_GREEN`	`#00FF00`
`PURE_RED`	`#FF0000`	`PURPLE`	`#9A72AC`
`PURPLE_A`	`#CAA3E8`	`PURPLE_B`	`#B189C6`
`PURPLE_C`	`#9A72AC`	`PURPLE_D`	`#715582`
`PURPLE_E`	`#644172`	`RED`	`#FC6255`
`RED_A`	`#F7A1A3`	`RED_B`	`#FF8080`
`RED_C`	`#FC6255`	`RED_D`	`#E65A4C`
`RED_E`	`#CF5044`	`TEAL`	`#5CD0B3`
`TEAL_A`	`#ACEAD7`	`TEAL_B`	`#76DDC0`
`TEAL_C`	`#5CD0B3`	`TEAL_D`	`#55C1A7`
`TEAL_E`	`#49A88F`	`WHITE`	`#FFFFFF`
`YELLOW`	`#FFFF00`	`YELLOW_A`	`#FFF1B6`
`YELLOW_B`	`#FFEA94`	`YELLOW_C`	`#FFFF00`
`YELLOW_D`	`#F4D345`	`YELLOW_E`	`#E8C11C`

四、改变出现顺序 Mobject on-screen order

the order of the arguments of add () determines the order that the mobjects are displayed on the screen, with the left-most arguments being put in the back.

add () 参数的顺序决定了 mobject 在屏幕上的显示顺序，最左边的参数放在后面。

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一、创建和显示 Creating and displaying mobjects

二、放置 Placing mobjects

放置方法：Placing method

Module Attributes

三、改变样式 Styling mobjects

四、改变出现顺序 Mobject on-screen order

五、常用的 Mobjects

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一、创建和显示 Creating and displaying mobjects

二、放置 Placing mobjects

放置方法：Placing method

Module Attributes

三、改变样式 Styling mobjects

四、改变出现顺序 Mobject on-screen order

五、常用的 Mobjects