def torus(name=None, **kwargs):
"""
Make a torus in the x-y plane
torus('mytorus', u=6, v=32, r=1, t=0.3)
u = number of subdivisions in a saggital section (small circle)
v = number of subdivisions in the horizontal section (big circle)
r = radius of the doughnut
t = thickness (radius)
th = degrees to rotate the small circle
"""
names, kwargs = utils.clean_names(name, kwargs, {'msh_name':'torus', 'obj_name':'torus', 'priority_msh':'current', 'priority_obj':'new'})
kwargs_def = {'n_u':16, 'r_u':0.3, 'n_v':32, 'r_v':1, 'theta_offset_deg':'auto'}
kwargs_alias = {'n_u':['n_u', 'u'], 'r_u':['r_u', 't', 'thickness'], 'n_v':['n_v', 'v'], 'r_v':['r_v', 'r'], 'theta_offset_deg':['theta_offset_deg', 'th', 'offset', 'th_off_deg', 'th_u']}
kwargs, _ = pn.clean_kwargs(kwargs, kwargs_def, kwargs_alias)
a = turtle.Draw(**names)
start = a.ngon(n=kwargs['n_u'], r=kwargs['r_u'], th_off_deg=kwargs['theta_offset_deg'])
bmesh.ops.rotate(a.bm, verts=start.v, cent=(0, 0, 0), matrix=mathutils.Matrix.Rotation(np.radians(90.0), 3, 'Y'))
for vert in start.v:
vert.co += mathutils.Vector((0., -kwargs['r_v'], 0.))
end = a.spin(angle=2*np.pi-2*np.pi/kwargs['n_v'], steps=kwargs['n_v']-1, axis='z', cent=(0., 0., 0.))
a.join(start.e + end.e)
tor = +a
return tor
def draw_spring():
"""Illustrates how to skin a curve using the Draw class."""
θ = np.radians(np.arange(0, 360 * 6 + 40, 40))
z1 = np.sin(θ)
y1 = np.cos(θ)
x1 = θ / 2
spine = np.array(
[np.array((tx, ty, tz)) for tx, ty, tz in zip(x1, y1, z1)])
a = turtle.Draw('testskin')
a.skin(spine, n=4, r=0.3)
return +a
def draw_basic():
"""Draw a loopy thing."""
a = turtle.Draw('link')
bmesh.ops.create_circle(a.bm, radius=0.2, segments=6)
for vert in a.bm.verts[:]:
vert.co += mathutils.Vector((0., -1., 0))
a.spin(angle=np.pi, steps=3, axis='x', cent=(0., 0., 0.))
for i in range(5):
a.spin(angle=np.pi,
steps=3,
axis=(1., 1.0 - 2.0 * (i % 2), 0),
cent=(2 * i + 1.0, 0., 0))
return +a
def __init__(self, name=None, x=0, y=0, z=0, **kwargs):
names, kwargs = utils.clean_names(name, kwargs, {'msh_name':'tube_msh', 'obj_name':'tube_obj', 'priority_obj':'new', 'priority_msh':'new'})
kwargs_ngon, _ = pn.clean_kwargs(kwargs, {'n':6, 'r':0.3, 'theta_offset_deg':-1}, {'n':['segments', 'seg', 'u', 'n'], 'r':['radius', 'r'], 'theta_offset_deg':['theta_offset_deg', 'th', 'offset', 'th_off_deg']})
spine = np.array([np.array((tx, ty, tz)) for tx, ty, tz in zip(x, y, z)])
normals = np.vstack((spine[1, :] - spine[0, :], spine[2:, :] - spine[:-2, :], spine[-1, :] - spine[-2, :]))
a = turtle.Draw(**names)
a.skin(spine, **kwargs_ngon)
a_exp = a.export()
this_obj = +a
super().__init__(this_obj.name, this_obj.data)
self.xsec = self.XSec(self, normals, a_exp)
def draw_link(n_u=6, n_v=16, l=1, r_v=1, r_u=0.2):
"""Draw one link of the chain. Same as the example in bmesh.ops page"""
a = turtle.Draw('link')
u_start = a.ngon(n=n_u, r=r_u)
for vert in u_start.v:
vert.co += mathutils.Vector((0., -r_v, 0))
u_end = a.spin(angle=np.pi, steps=n_v, axis='x', cent=(0., 0., 0.))
n_start = a.extrude(u_end.e)
for vert in n_start.v:
vert.co += mathutils.Vector((0, 0, l))
n_end = a.spin(angle=np.pi, steps=n_v, axis='x', cent=(0., 0., l))
a.join(u_start.e + n_end.e)
return +a
def draw_atom():
"""Electron clouds-like structure."""
a = turtle.Draw('cloud', coll_name='atom')
a.ngon(n=2, r=0.1)
for vert in a.bm.verts[:]:
vert.co += mathutils.Vector((0., -1., 0))
a.spin(angle=np.pi, steps=24, axis='x', cent=(0., 0., 0.))
a.spin(angle=2 * np.pi,
steps=6,
axis='y',
cent=(0., 0., 0.),
geom=turtle.Geom(a.bm).all,
use_duplicate=True)
cloud = +a
cloud.scale((1, 0.6, 1))
nucleus = new.sphere('nucleus', r=0.2, coll_name='atom')
return (nucleus, cloud)