AnnularSector

Qualified name: manim.mobject.geometry.arc.AnnularSector

class AnnularSector(inner_radius=1, outer_radius=2, angle=1.5707963267948966, start_angle=0, fill_opacity=1, stroke_width=0, color=ManimColor('#FFFFFF'), **kwargs)

Bases: Arc

A sector of an annulus.

Parameters:

• inner_radius (float) – The inside radius of the Annular Sector.

• outer_radius (float) – The outside radius of the Annular Sector.

• angle (float) – The clockwise angle of the Annular Sector.

• start_angle (float) – The starting clockwise angle of the Annular Sector.

• fill_opacity (float) – The opacity of the color filled in the Annular Sector.

• stroke_width (float) – The stroke width of the Annular Sector.

• color (ManimColor) – The color filled into the Annular Sector.

• kwargs (Any)

Examples

Example: AnnularSectorExample

from manim import *

class AnnularSectorExample(Scene):
    def construct(self):
        # Changes background color to clearly visualize changes in fill_opacity.
        self.camera.background_color = WHITE

        # The default parameter start_angle is 0, so the AnnularSector starts from the +x-axis.
        s1 = AnnularSector(color=YELLOW).move_to(2 * UL)

        # Different inner_radius and outer_radius than the default.
        s2 = AnnularSector(inner_radius=1.5, outer_radius=2, angle=45 * DEGREES, color=RED).move_to(2 * UR)

        # fill_opacity is typically a number > 0 and <= 1. If fill_opacity=0, the AnnularSector is transparent.
        s3 = AnnularSector(inner_radius=1, outer_radius=1.5, angle=PI, fill_opacity=0.25, color=BLUE).move_to(2 * DL)

        # With a negative value for the angle, the AnnularSector is drawn clockwise from the start value.
        s4 = AnnularSector(inner_radius=1, outer_radius=1.5, angle=-3 * PI / 2, color=GREEN).move_to(2 * DR)

        self.add(s1, s2, s3, s4)

class AnnularSectorExample(Scene):
    def construct(self):
        # Changes background color to clearly visualize changes in fill_opacity.
        self.camera.background_color = WHITE

        # The default parameter start_angle is 0, so the AnnularSector starts from the +x-axis.
        s1 = AnnularSector(color=YELLOW).move_to(2 * UL)

        # Different inner_radius and outer_radius than the default.
        s2 = AnnularSector(inner_radius=1.5, outer_radius=2, angle=45 * DEGREES, color=RED).move_to(2 * UR)

        # fill_opacity is typically a number > 0 and <= 1. If fill_opacity=0, the AnnularSector is transparent.
        s3 = AnnularSector(inner_radius=1, outer_radius=1.5, angle=PI, fill_opacity=0.25, color=BLUE).move_to(2 * DL)

        # With a negative value for the angle, the AnnularSector is drawn clockwise from the start value.
        s4 = AnnularSector(inner_radius=1, outer_radius=1.5, angle=-3 * PI / 2, color=GREEN).move_to(2 * DR)

        self.add(s1, s2, s3, s4)

Methods

generate_points	Initializes points and therefore the shape.
init_points

Attributes

always	Call a method on a mobject every frame.
animate	Used to animate the application of any method of self.
animation_overrides
color
depth	The depth of the mobject.
fill_color	If there are multiple colors (for gradient) this returns the first one
height	The height of the mobject.
n_points_per_curve
sheen_factor
stroke_color
width	The width of the mobject.

_original__init__(inner_radius=1, outer_radius=2, angle=1.5707963267948966, start_angle=0, fill_opacity=1, stroke_width=0, color=ManimColor('#FFFFFF'), **kwargs)

Initialize self. See help(type(self)) for accurate signature.

Parameters:

• inner_radius (float)

• outer_radius (float)

• angle (float)

• start_angle (float)

• fill_opacity (float)

• stroke_width (float)

• color (ParsableManimColor)

• kwargs (Any)

Return type:

None

generate_points()

Initializes points and therefore the shape.

Gets called upon creation. This is an empty method that can be implemented by subclasses.

Return type:

None