open3dのインストール
pip install open3d
o3d_cylinder.py
import open3d as o3d
# 1つめ
mesh1 = o3d.geometry.TriangleMesh.create_cylinder()
mesh1.compute_vertex_normals()
# 2つめ
mesh2 = o3d.geometry.TriangleMesh.create_cylinder()
mesh2.compute_vertex_normals()
# (相対)移動
mesh2.translate([0,10,10])
# STLで出力
o3d.io.write_triangle_mesh("sample.stl", mesh1+mesh2)
参考
http://www.open3d.org/docs/release/tutorial/Basic/visualization.html