Node

Node

A class to manage nodes in a tikz environment.

This class is equivalent to the tikz code

\node[<options>] at (<position>) {<text>};

Parameters:

Name	Type	Description	Default
position	tuple)	Pair of floats representing the location of the node	required
options	str)	String containing node options (e.g., "above")	''
text	str	Text that will be displayed with the node; can use dollar signs $ for LaTeX	''

position property writable

position

Returns a Point object representing the position of the node. This attribute is modifiable.

__deepcopy__

__deepcopy__(memo: dict) -> Node

Creates a deep copy of a class object. This is useful since in our classes, we chose to set our methods to modify objects, but not return anything.

copy

copy(**kwargs: dict) -> Node

Allows one to simultaneously make a (deep) copy of a drawing object and modify attributes of the drawing object in one step.

Examples

Here we use some nodes to label a figure explaining the logarithm branch cut

import tikzpy

tikz = tikzpy.TikzPicture()
# x,y axes
tikz.line((-4, 0), (4, 0), options="Gray!40, ->")
tikz.line((0, -4), (0, 4), options="Gray!40, ->")
# Cut
tikz.line((-4, 0), (0, 0), options="thick")
# Line out
tikz.line((0, 0), (1.414, 1.414), options="-o")
tikz.arc((1, 0), 0, 45, radius=1, options="dashed")

# Labels
tikz.node((3.6, -0.2), text="$x$")
tikz.node((-0.24, 3.53), text="$iy$")
tikz.node((1.3, 0.4), text="$\\theta$")
tikz.node((2.1, 1.7), text="$z = re^{i\\theta}$")
tikz.node((-2, 0.3), text="Cut")

which produces

Here's another example of usings nodes to illustrate the concept of a multivariable function.

import tikzpy

tikz = tikzpy.TikzPicture()

arrow_len = 2
box_width = 2
# Lines and rectangles
input_arrow = tikz.line((0, 0), (arrow_len, 0), options="->")
box = tikz.rectangle_from_west(input_arrow.end, width=box_width, height=1)
output_arrow = tikz.line(box.east, box.east + (arrow_len, 0), options="->")

# Labels
tikz.node((-1.2, 0), text="$(x_1, \dots, x_n)$")
tikz.node(input_arrow.midpoint() + (0, 0.3), text="input")
tikz.node(box.center, text="$f$")
tikz.node(output_arrow.midpoint() + (0, 0.3), text="output")
tikz.node((7.3, 0), text="$f(x_1, \dots, x_n)$")
tikz.show()