register_shape_conversion()

Register new shape conversion functionality to be used by convert_shape().

Examples

import numpy as np
from shapely import Point

def shapely_point_precondition(obj):
    return isinstance(obj, Point)

# draw shapely points as a group of gaussian distributed points
def shapely_point_converter(sketch, obj, **kwargs):
    sigma = kwargs.get('sigma', 5)
    points = sigma * np.random.randn(1000, 2) + [obj.x, obj.y]

    s = sketch.create_shape()
    with s.begin_shape(sketch.POINTS):
        s.vertices(points)

    return s

py5.register_shape_conversion(
    shapely_point_precondition, shapely_point_converter
)

def setup():
    point1 = Point(30, 70)
    point2 = Point(70, 30)

    points1 = py5.convert_shape(point1)
    points2 = py5.convert_shape(point2, sigma=10)
    py5.println(type(points1))
    py5.println(type(points2))
    py5.shape(points1)
    py5.shape(points2)

Description

Register new shape conversion functionality to be used by convert_shape(). This will allow users to extend py5’s capabilities and compatability within the Python ecosystem.

The precondition parameter must be a function that accepts an object as a parameter and returns True if and only if the convert_function can successfully convert the object.

The convert_function parameter must be a function that accepts an object as a parameter and returns a Py5Shape object.

Signatures

register_shape_conversion(
    precondition: Callable,  # predicate determining if an object can be converted
    convert_function: Callable,  # function to convert object to Py5Shape object
) -> None

Updated on December 11, 2023 16:58:45pm UTC