Path


Martin McBride, 2020-10-27
Tags geometry path
Categories generativepy generative art

The Path class creates a shape based on a path object.

A path object can be obtained using the path method of any Shape object - a Rectangle, Circle, or even a Text objetc can be used to create a path.

See the paths tutorial for examples.

Path class methods

The Path class inherits add, fill, stroke, fill_stroke, path, clip and other methods from Shape.

It has additional methods:

  • of

of

Creates a shape based on an existing path.

of(path)
Parameter Type Description
path Pycairo path object A path

A path object is usually obtained by calling the path method another shape. A Path object recreates the shape and allows it to be filled.

Here is an example:

p = Rectangle(ctx).of_corner_size((0.5, 0.5), 1, 3).path()

Path.of(p).fill(Color('yellow'))

The first line creates a rectangle, but doesn't draw it, instead it obtains a path object p.

At some point later in the code, you can draw the shape by passing p into a Path object and filling or stroking it.

This is useful if you want to reuse a path, drawing it multiple times, or if you need to create a path is one part of your code but store it for use somewhere else. Paths also have advanced applications such as drawing text along a curve.

If you found this article useful, you might be interested in the book Computer Graphics in Python or other books by the same author.

Prev

Popular tags

2d arrays abstract data type alignment and animation arc array arrays bezier curve built-in function callable object circle classes close closure cmyk colour comparison operator comprehension context context manager conversion creational pattern data types design pattern device space dictionary drawing duck typing efficiency else encryption enumerate fill filter font font style for loop function function composition function plot functools game development generativepy tutorial generator geometry gif gradient greyscale higher order function hsl html image image processing imagesurface immutable object index inner function input installing iter iterable iterator itertools l system lambda function len line linspace list list comprehension logical operator lru_cache magic method mandelbrot mandelbrot set map monad mutability named parameter numeric python numpy object open operator optional parameter or partial application path polygon positional parameter print pure function pycairo radial gradient range recipes rectangle recursion reduce rgb rotation scaling sector segment sequence singleton slice slicing sound spirograph sprite square str stream string stroke subpath symmetric encryption template text text metrics tinkerbell fractal transform translation transparency tuple turtle unpacking user space vectorisation webserver website while loop zip