Line3D#

Qualified name: manim.mobject.three\_d.three\_dimensions.Line3D

class Line3D(start=array([- 1., 0., 0.]), end=array([1., 0., 0.]), thickness=0.02, color=None, **kwargs)[source]#

Bases: Cylinder

A cylindrical line, for use in ThreeDScene.

Parameters

start (np.ndarray) – The start point of the line.
end (np.ndarray) – The end point of the line.
thickness (float) – The thickness of the line.
color (Color) – The color of the line.

Examples

Example: ExampleLine3D ¶

from manim import *

class ExampleLine3D(ThreeDScene):
    def construct(self):
        axes = ThreeDAxes()
        line = Line3D(start=np.array([0, 0, 0]), end=np.array([2, 2, 2]))
        self.set_camera_orientation(phi=75 * DEGREES, theta=30 * DEGREES)
        self.add(axes, line)

Methods

`get_end`	Returns the ending point of the `Line3D`.
`get_start`	Returns the starting point of the `Line3D`.
`parallel_to`	Returns a line parallel to another line going through a given point.
`perpendicular_to`	Returns a line perpendicular to another line going through a given point.
`pointify`	Gets a point representing the center of the `Mobjects`.
`set_start_and_end_attrs`	Sets the start and end points of the line.

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.

get_end()[source]#

Returns the ending point of the Line3D.

Returns: end – Ending point of the Line3D.
Return type: numpy.array

get_start()[source]#

Returns the starting point of the Line3D.

Returns: start – Starting point of the Line3D.
Return type: numpy.array

classmethod parallel_to(line, point=array([0., 0., 0.]), length=5, **kwargs)[source]#

Returns a line parallel to another line going through a given point.

Parameters

line (Line3D) – The line to be parallel to.
point (Sequence[float]) – The point to pass through.
length (float) – Length of the parallel line.
kwargs – Additional parameters to be passed to the class.

Returns

Line parallel to line.

Return type

Line3D

Examples

Example: ParallelLineExample ¶

from manim import *

class ParallelLineExample(ThreeDScene):
    def construct(self):
        self.set_camera_orientation(PI / 3, -PI / 4)
        ax = ThreeDAxes((-5, 5), (-5, 5), (-5, 5), 10, 10, 10)
        line1 = Line3D(RIGHT * 2, UP + OUT, color=RED)
        line2 = Line3D.parallel_to(line1, color=YELLOW)
        self.add(ax, line1, line2)

classmethod perpendicular_to(line, point=array([0., 0., 0.]), length=5, **kwargs)[source]#

Returns a line perpendicular to another line going through a given point.

Parameters

line (Line3D) – The line to be perpendicular to.
point (Sequence[float]) – The point to pass through.
length (float) – Length of the perpendicular line.
kwargs – Additional parameters to be passed to the class.

Returns

Line perpendicular to line.

Return type

Line3D

Examples

Example: PerpLineExample ¶

from manim import *

class PerpLineExample(ThreeDScene):
    def construct(self):
        self.set_camera_orientation(PI / 3, -PI / 4)
        ax = ThreeDAxes((-5, 5), (-5, 5), (-5, 5), 10, 10, 10)
        line1 = Line3D(RIGHT * 2, UP + OUT, color=RED)
        line2 = Line3D.perpendicular_to(line1, color=BLUE)
        self.add(ax, line1, line2)

pointify(mob_or_point, direction=None)[source]#

Gets a point representing the center of the Mobjects.

Parameters

mob_or_point (Mobject | float) – Mobjects or point whose center should be returned.
direction (np.ndarray) – If an edge of a Mobjects should be returned, the direction of the edge.

Returns

Center of the Mobjects or point, or edge if direction is given.

Return type

numpy.array

set_start_and_end_attrs(start, end, **kwargs)[source]#

Sets the start and end points of the line.

If either start or end are Mobjects, this gives their centers.

Parameters

start (ndarray) – Starting point or Mobject.
end (ndarray) – Ending point or Mobject.

Return type

None