BackgroundRectangle

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

class BackgroundRectangle(*mobjects, 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))

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

pointwise_become_partial	Given a 2nd VMobject vmobject, a lower bound a and an upper bound b, modify this VMobject's points to match the portion of the Bézier spline described by vmobject.points with the parameter t between a and b.
set_style

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.

Parameters:

• mobjects (Mobject)

• color (ParsableManimColor | None)

• stroke_width (float)

• stroke_opacity (float)

• fill_opacity (float)

• buff (float | tuple[float, float])

• kwargs (Any)

_original__init__(*mobjects, color=None, stroke_width=0, stroke_opacity=0, fill_opacity=0.75, buff=0, **kwargs)

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

Parameters:

• mobjects (Mobject)

• color (TypeAliasForwardRef('~manim.utils.color.core.ParsableManimColor') | None)

• stroke_width (float)

• stroke_opacity (float)

• fill_opacity (float)

• buff (float | tuple[float, float])

• kwargs (Any)

Return type:

None

pointwise_become_partial(mobject, a, b)

Given a 2nd VMobject vmobject, a lower bound a and an upper bound b, modify this VMobject’s points to match the portion of the Bézier spline described by vmobject.points with the parameter t between a and b.

Parameters:

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

• a (Any) – The lower bound for t.

• b (float) – The upper bound for t

• mobject (Mobject)

Returns:

The VMobject itself, after the transformation.

Return type:

VMobject

Raises:

TypeError – If vmobject is not an instance of VMobject.