[05-3-E] Polygon series(2/2): Rectangle/Square/Rounded Rectangle

Rectangle class

object > Container > Mobject > VMobject > Polygon > Rectangle

manimlib.mobject.geometry.Rectangle(self, **kwargs)

Create a rectangle.
By default, a white rectangle with a width is 4 and height is 2 is created around the origin.

 

rect = Rectangle()

 

    CONFIG = {
        "color": WHITE,
        "height": 2.0,
        "width": 4.0,
        "mark_paths_closed": True,
        "close_new_points": True,
    }

Parameters: **kwargs
    CONFIG values of Rectangle and Polygon/VMobject/Mobject

    Frequently used variables are:
    - color=WHITE: line color. possible to use ' ' to set the line color
    - height=2.0: height length
    - width=4.0: width length
    - stroke_width=4: line thickness
    - fill_color=None: set color for inner space of rectangle
    - fill_opacity=0.0: set opacity for inner space of rectangle

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Square class

object > Container > Mobject > VMobject > Polygon > Rectangle > Square

manimlib.mobject.geometry.Square(self, **kwargs)

Create a square.
By default, a white square with a width of 2 and a height of 2 is created around the origin.

 

square = Square()

    CONFIG = {
        "side_length": 2.0,
    }

Parameters: **kwargs
  Square 및 Rectangle/Polygon/VMobject/Mobject 의 CONFIG 값

  주로 사용되는 값은,
  - side_length=2: 정사각형의 한 변의 길이
  - color=WHITE: 선의 색상 지정.  를 지정해도 동일한 효과 
  - stroke_width=4: 선의 두께 지정. 
  - fill_color=None: 객체 내부 색상 지정
  - fill_opacity=0.0: 객체 내부 투명도 지정

---

RoundedRectangle class

 object > Container > Mobject > VMobject > Polygon > Rectangle > RoundedRectangle

manimlib.mobject.geometry.RoundedRectangle(self, **kwargs)

Create a rectangle with rounded corners.
By default, a white rectangle is created, width of 2 and height of 1, around the origin.

 

rect = RoundedRectangle()

 

    CONFIG = {
        "corner_radius": 0.5,
    }

Parameters: **kwargs
    CONFIG values of RoundedRectangle and Rectangle/Polygon/VMobject/Mobject

    Frequently used variables are: 
    - corner_radius=0.5: Determines the roundness of the corners. 
                       Value greater than zero. 
                       The greater the roundness, the greater the roundness
    - side_length=2: The length of one side of the square
    - color=WHITE: line color
    - stroke_width=4: line thickness
    - fill_color=None: color for inner space of the rectangle
    - fill_opacity=0.0: transparancy of inner space

 

You can determine the roundness of the corners by adjusting the corner_radius value. 

 

The value should be a value greater than 0, and the larger the value, the greater the roundness.  If the value of corner_radius is greater than the length of one side of the rectangle, the shape becomes strange.

Below is an example of creating a rectangle based on the value of corner_radius.  If the length of the vertical is 1, and corner_radius> 1, you can see that the shape changes strangely.

 

    def round_test(self):
        values = [0.1, 0.5,1,1.5,2]

        def get_rect(val):
            rect = RoundedRectangle(corner_radius=val).scale(0.5)
            text = Text(str(val), size=0.3, stroke_width=0).next_to(rect, UP)
            return VGroup(rect,text)

        rects = VGroup(*[get_rect(v) for v in values])      
        rects.arrange(RIGHT)

        self.add(rects)
        self.wait()

 

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Next: [05-3-F] Arc series: Arc/ArcBetweenPoints/CurvedArrow

[05-3-F] Arc series: Arc/ArcBetweenPoints/CurvedArrow

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