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Line

Description​

The Line class inherits from VMobject, representing a line segment between two points or Mobjects. The default drawing style for a line is a stroke with the color WHITE. A line cannot be "filled".

Constructor Parameters​

  • start (Point3D | Mobject, default=LEFT): Starting point or Mobject.
  • end (Point3D | Mobject, default=RIGHT): Ending point or Mobject.
  • buff (float, default=0.0): Buffer distance from the start and end points. Positive buffs cause the line to shorten.
  • color (ManimColor, default=WHITE): Equivalently, use stroke_color.
  • opacity (float, default=1.0): Equivalently, use stroke_opacity.
  • kwargs (dict): Additional arguments for VMobject.

Attributes​

  • start (Point3D): Starting point of the line.
  • end (Point3D): Ending point of the line.
  • length (float): Length of the line.
  • midpoint (Point3D): Midpoint of the line.
  • direction (Point3D): Direction vector of the line.
  • angle (Point3D): Angle of the line, in radians.

Examples​

Example 1​

A line between two points with custom color.

from smanim import *

line = Line(start=LEFT + DOWN, end=RIGHT + UP, color=RED)
canvas.add(line)
canvas.snapshot(preview=True, crop=True, ignore_bg=True)
Example 1

Example 2​

A line between two mobjects.

from smanim import *

d1 = Dot(LEFT + DOWN, color=BLUE)
d2 = Dot(RIGHT + UP, color=BLUE)
line = Line(start=d1, end=d2, color=RED)
canvas.add(d1, d2, line)
canvas.draw(crop=True, ignore_bg=True)
Example 2

Example 3​

A kite with a line segment between a vertex and a side's midpoint.

from smanim import *

vertices = [UP * 2, RIGHT + UP, DOWN * 2, LEFT + UP]

kite = Polygon(vertices, stroke_color=GRAY)

bottom_midpoint = (vertices[2] + vertices[3]) / 2
start_vertex = Dot(vertices[0], color=DARK_GRAY)
start_label = Text("A", color=DARK_GRAY).next_to(start_vertex, UP)
end_vertex = Dot(bottom_midpoint, color=DARK_GRAY)
end_label = Text("B", color=DARK_GRAY).next_to(end_vertex, LEFT)

bisecting_line = Line(start=start_vertex, end=end_vertex, color=RED, stroke_width=2.0)
line_label = Text("10", color=DARK_GRAY).next_to(bisecting_line.midpoint, RIGHT)

canvas.add(
    kite, bisecting_line, start_vertex, end_vertex, start_label, end_label, line_label
)
canvas.draw(crop=True, ignore_bg=True)
Example 2