BackgroundRectangle

Qualified name: manim.mobject.geometry.shape\_matchers.BackgroundRectangle

class BackgroundRectangle(mobject, color=None, stroke_width=0, stroke_opacity=0, fill_opacity=0.75, buff=0, **kwargs)

Bases: SurroundingRectangle

A background rectangle. Its default color is the background color of the scene.

Examples

Example: ExampleBackgroundRectangle

from manim import *

class ExampleBackgroundRectangle(Scene):
    def construct(self):
        circle = Circle().shift(LEFT)
        circle.set_stroke(color=GREEN, width=20)
        triangle = Triangle().shift(2 * RIGHT)
        triangle.set_fill(PINK, opacity=0.5)
        backgroundRectangle1 = BackgroundRectangle(circle, color=WHITE, fill_opacity=0.15)
        backgroundRectangle2 = BackgroundRectangle(triangle, color=WHITE, fill_opacity=0.15)
        self.add(backgroundRectangle1)
        self.add(backgroundRectangle2)
        self.add(circle)
        self.add(triangle)
        self.play(Rotate(backgroundRectangle1, PI / 4))
        self.play(Rotate(backgroundRectangle2, PI / 2))

Methods

get_fill_color	If there are multiple colors (for gradient) this returns the first one
pointwise_become_partial	Given two bounds a and b, transforms the points of the self vmobject into the points of the vmobject passed as parameter with respect to the bounds.
set_style

Attributes

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.

Parameters

• color (Colors | None) –

• stroke_width (float) –

• stroke_opacity (float) –

• fill_opacity (float) –

• buff (float) –

get_fill_color()

If there are multiple colors (for gradient) this returns the first one

pointwise_become_partial(mobject, a, b)

Given two bounds a and b, transforms the points of the self vmobject into the points of the vmobject passed as parameter with respect to the bounds. Points here stand for control points of the bezier curves (anchors and handles)

Parameters

• vmobject – The vmobject that will serve as a model.

• a – upper-bound.

• b – lower-bound

Returns

self

Return type

VMobject