[Manifold3D and Manim] Using the manifold3D library within Manim. #manim #3D #manifold3D #csg

20260218_manifold.py

from manim import *
import manifold3d as mf3

class spherical(ThreeDScene):
    def construct(self):
        self.set_camera_orientation(phi=70 * DEGREES, theta=-70 * DEGREES)
        sp = mf3.Manifold.sphere(radius =2, circular_segments=24)

        verts = sp.to_mesh().vert_properties
        manimsphere = VGroup(
            Polygon(
                *[verts[k],verts[l],verts[m]],
                joint_type = LineJointType.ROUND,
                fill_opacity=0.5,
                stroke_width=1,
                stroke_color=ORANGE,
            )
            for (k,l,m) in sp.to_mesh().tri_verts
        )
        self.add(manimsphere)


class intersection(ThreeDScene):
    def construct(self):
        self.set_camera_orientation(phi=70 * DEGREES, theta=-70 * DEGREES)
        sp = mf3.Manifold.sphere(radius =2, circular_segments=24)
        box = mf3.Manifold.cube(size=[3,3,3], center=True)

        obj = box ^ sp

        verts = obj.to_mesh().vert_properties
        manimobj = VGroup(
            Polygon(
                *[verts[k],verts[l],verts[m]],
                joint_type = LineJointType.ROUND,
                fill_opacity=1,
                stroke_width=1,
                stroke_color=ORANGE,
            )
            for (k,l,m) in obj.to_mesh().tri_verts
        )
        self.add(manimobj)
        self.begin_ambient_camera_rotation(0.5)
        self.wait(5)

readme.md

How to use the mesh functions from the Python library Manifold3D in Manim.

This code is for the Cairo renderer - some changes will probably be necessary for the opengl renderer, however since the opengl-renderer natively works with triangular meshes, it should be quite feasible.

Two examples: a simple sphere and the intersection between a sphere and a cube