Скрипт построения в блендере парочки молекул )

                        
from math import degrees, acos

from mathutils import Vector

 

spheres = (Vector((2,3,3)),Vector((1,1,2)),Vector((2,3,4)),Vector((4,5,3)))

edges = ((0,1),(1,2),(2,3))

 

for i in range(0, len(spheres)):

    r1 = spheres[i]

    bpy.ops.mesh.primitive_uv_sphere_add(location=(r1.x, r1.y, r1.z))

 

for i in range(0,len(edges)):

     r1 = spheres[edges[i][0]]

     r2 = spheres[edges[i][1]]

     r3 = (r1+r2)/2

     z = Vector((0,0,1))

     z_desired = (r1-r2).normalized()

     rot_axis = z.cross(z_desired)

     angle = acos(z.dot(z_desired))

     bpy.ops.mesh.primitive_cylinder_add(radius=0.3, depth=(r2-r1).length,location=(r3.x,r3.y,r3.z))

     bpy.ops.transform.rotate(value=(angle,), axis=rot_axis)