Function Shape

This example show how to create a shape from a mathematical function. In this example we use f(x) = sin(x) + log(x) + 5.5

/home/runner/.local/lib/python3.10/site-packages/b2d/testbed/backend/matplotlib_gif_gui/matplotlib_gif_gui.py:52: UserWarning: You passed in an explicit save_count=240 which is being ignored in favor of frames=240.
  self.ani = animation.FuncAnimation(

from b2d.testbed import TestbedBase
import random
import numpy
import b2d


class FunctionShape(TestbedBase):

    name = "Function Shape"

    def __init__(self, settings=None):
        super(FunctionShape, self).__init__(settings=settings)

        x = numpy.linspace(start=1, stop=30, num=100)
        y = numpy.sin(x) * numpy.log(x) + 5.5
        verts = numpy.stack([x, y], -1)
        verts = numpy.require(verts, requirements=["C"])

        shape = b2d.chain_shape(vertices=numpy.flip(verts, axis=0))

        box = self.world.create_static_body(position=(0, 0), shape=shape)

        for i in range(30):
            box = self.world.create_dynamic_body(
                position=(10 + random.random() * 10, random.random() * 10 + 10),
                shape=b2d.circle_shape(pos=(0, 0), radius=0.7),
                density=1.0,
            )


if __name__ == "__main__":

    ani = b2d.testbed.run(FunctionShape)
    ani