Open3d: How to manipulate meshes

[iqbalu]

Hi,

Thanks for the great library. How can we rotate, translate, scale the meshes from python api. How can we place the sphere at a specific 3D location?

My use case: I need to draw a 3D skeleton with nodes as spheres and edges as cylinders.

Thanks

[syncle]

Hi @iqbalu
According to this tutorial, you can create sphere and cylinder. For example,

mesh_sphere = create_mesh_sphere(radius = 1.0)
mesh_cylinder = create_mesh_cylinder(radius = 0.3, height = 4.0)

Now prepare your 4x4 matrix that includes scale, rotation, and translation. As we shown in this tutorial, you may try the following:

your_transform = np.asarray(
                [[0.862, 0.011, -0.507,  0.5],
                [-0.139, 0.967, -0.215,  0.7],
                [0.487, 0.255,  0.835, -1.4],
                [0.0, 0.0, 0.0, 1.0]])
mesh_sphere.transform(your_transform)
mesh_cylinder.transform(your_transform)
draw_geometries([mesh_sphere, mesh_cylinder])

[iqbalu]

Great! Thank you!