def get_constrained_YCP(L_x, L_y, n_x, n_y):
def geo_trans(X):
x, y, z = X.T
y = y - 1.1
# y[2], y[3], y[4], y[5] = -1.428, 1.428, -1, 1
y[2], y[3], y[4], y[5] = -0.7488, 0.7488, -0.275, 0.275
# x[2], x[3], x[8] , x[9] = 3.43, 3.43, 1.93, 4.93
x[2], x[3], x[8] , x[9] = 3.6925, 3.6925, 2.045, 5.34
return np.c_[x, y, z]
cp = YoshimuraCreasePattern(L_x=L_x, L_y=L_y, n_x=n_x, n_y=n_y,
geo_transform=geo_trans)
fixed_node = fix(cp.N_h[0, 0], (0, 1, 2))
planar_front_boundary = link(cp.N_h[0, 0], 1, 1.0,
cp.N_h[1:, 0], 1, -1.0)
planar_back_boundary = link(cp.N_h[0, -1], 1, 1.0,
cp.N_h[1:, -1], 1, -1.0)
linked_left_boundary_x = link(cp.N_h[0, 0], 0, 1.0,
cp.N_h[0, 1:], 0, -1.0)
linked_left_boundary_z = link(cp.N_h[0, 0], 2, 1.0,
cp.N_h[0, 1:], 2, -1.0)
linked_left_and_right_z = link(cp.N_v[0, :], 2, 1.0,
cp.N_v[1, :], 2, -1.0)
# linked_right_boundary_x = link(ycp.N_v[-1, 0], 0, 1.0,
# ycp.N_v[-1, 1:], 0, -1.0)
cntrl_displ = [([(cp.N_v[1, 0], 0, 1.0)], -1)]
cs=fixed_node+planar_front_boundary+planar_back_boundary+linked_left_boundary_x+linked_left_boundary_z+linked_left_and_right_z+cntrl_displ
caf = CnstrTargetFace(F=[r_, s_, 4 * 0.4 * t_ * r_ * (1 - r_ / L_x) + 0.15])
n_arr = np.hstack([cp.N_h[:, :].flatten(),
cp.N_i[:, :].flatten()
])
fold = Folding(cp=cp, n_steps=10, dof_constraints= cs,
init_tf_lst=[(caf, n_arr)] )
fold.show()
return fold
fold.u_t[-1]
fold_further = Folding(source=fold,
name='fold further',
goal_function_type='potential_energy',
n_steps=4,
MAX_ITER=1000,
dof_constraints=fix(n_l_h, [0], v) + fix(n_lr_h, [2]) +
fix(n_fixed_y, [1]) + fix(n_r_h, [0], -v)
)
fold_further.u_t[-1]
and_fold_further = Folding(source=fold_further,
name='and fold further',
goal_function_type='potential_energy',
n_steps=4,
MAX_ITER=1000,
dof_constraints=fix(n_l_h, [0], 0) + fix(n_lr_h, [2]) +
fix(n_fixed_y, [1]) + fix(n_r_h, [0], 0)
)
u_0 = np.zeros_like(fold_further.u_t[-1])
u_0[12, 0] += 0.2
and_fold_further.U_0 = u_0.flatten()
and_fold_further.u_t[-1]
cpw = CreasePatternView(root=init)
cpw.configure_traits()
from oricrete.folding2 import \
YoshimuraCreasePattern, CnstrTargetFace, Folding, fix, link, r_, s_, t_
import numpy as np
def geo_trans(X):
x, y, z = X.T
y_ = (y - 0.4) * (1 - 0.6 / 1.2 * x)
return np.c_[x, y_, z]
cp = YoshimuraCreasePattern(L_x=1.2, L_y=0.8, n_x=4, n_y=8,
geo_transform=geo_trans)
face_z_t = CnstrTargetFace(F=[r_, s_, 1.0 * t_ * r_ * (1 - r_ / 1.2)])
fold_to_target_face = Folding(cp=cp, n_steps=10,
tf_lst=[(face_z_t, np.hstack([cp.N_h[:, (0, -1)].flatten(),
cp.N_h[(0, -1), 1:-1].flatten(),
cp.N_i[(0, -1), :].flatten()
]))],
init_tf_lst=[(face_z_t, np.hstack([cp.N_h.flatten(),
cp.N_i.flatten()]))],
)
fold_to_target_face.show()
from oricrete.folding2 import \
YoshimuraCreasePattern, Initialization, CnstrTargetFace, Folding, link, r_, s_, t_
cp = YoshimuraCreasePattern(L_x=1.2, L_y=0.8, n_x=3, n_y=4)
face_z_t = CnstrTargetFace(F=[r_, s_, 0.8 * t_ * r_ * (1 - r_ / 1.2)])
fold = Folding(source=cp, n_steps=8,
tf_lst=[(face_z_t, cp.N)],
init_tf_lst=[(face_z_t, cp.N)])
fold.show()
fold2 = Folding(cp=cp, n_steps=8, unfold=True,
tf_lst=[(face_z_t, cp.N)])
fold2.X = fold.x_t[-1]
print fold2.t_arr
fold2.show()
cs= [ ([(0, 1, 1.0)], 0.005),
([(1, 1, 1.0)], -0.005),
([(2, 1, 1.0)], 0.005),
([(3, 1, 1.0)], -0.005),
([(4, 1, 1.0)], 0.005),
([(5, 1, 1.0)], -0.005),
([(6, 0, 1.0)], 0.0),
([(6, 1, 1.0)], 0.0),
([(6, 2, 1.0)], 0.0),
([(7, 1, 1.0)], 0.0),
([(8, 1, 1.0)], 0.0),
]
t_x= link(cp.N_h[:,0],0,-1.0 , cp.N_h[:,1],0,1.0)
t_y= link(cp.N_h[:,0],1,1.0 , cp.N_h[:,1],1,1.0)
#t_z= link(cp.N_h[0,0],2,-1.0 , cp.N_h[0,1],2,1.0)
t_fix=fix(cp.N_v[0,0],[0,1,2])
t_fix2=fix(cp.N_v[-1,0],[1])
cntrl_displ = [([(cp.N_v[-1,0], 0, 1.0)], -0.01)]
#cs= t_x+t_y+t_fix+t_fix2+cntrl_displ
print "cs",cs
face_z_t = CnstrTargetFace(F=[r_, s_, 0.8 * t_ * r_ * (1 - r_ / L_x)])
fold = Folding(cp=cp, n_steps=8, dof_constraints= cs,
init_tf_lst=[(face_z_t, cp.N)] )
fold.show()
print fold.x_t[-1]
x, y, z = X.T
y_ = (y - 0.4) * (1 - 0.6 / 1.2 * x)
return np.c_[x, y_, z]
cp = YoshimuraCreasePattern(L_x=1.2, L_y=0.8, n_x=3, n_y=8,
)
face_z_t = CnstrTargetFace(F=[r_, s_, 0.6 * t_ * r_ * (1 - r_ / 1.2)])
fold_to_target_face = Folding(cp=cp, n_steps=8,
tf_lst=[(face_z_t, cp.N)],
init_tf_lst=[(face_z_t, cp.N)])
U_t = fold_to_target_face.u_t[-1]
face_z = CnstrTargetFace(F=[r_, s_, 0.6 * r_ * (1 - r_ / 1.2)])
mid_node_idx = 8 / 4
narrow = Folding(cp=cp,
n_steps=14,
tf_lst=[(face_z, np.hstack([cp.N_h[(0, 1), :].flatten()]))],
U_0=U_t,
dof_constraints=fix(cp.N_h[:, mid_node_idx], 1) + \
link(cp.N_h[0, mid_node_idx - 1], 2, 1.0, cp.N_h[0, mid_node_idx + 1], 2, -1.0) + \
link(cp.N_h[-1, 0], 2, 1.0, cp.N_h[-1, 1:], 2, -1.0) + \
link(cp.N_h[-1, 0], 0, 1.0, cp.N_h[-1, 1:], 0, -1.0) + \
[([(cp.N_h[-1, 0], 1, 1.0)], 0.05),
([(cp.N_h[-1, -1], 1, 1.0)], -0.05)]
)
narrow.show()
[0, 3],
[1, 3],
[1, 4],
[2, 3],
[2, 5],
[3, 4],
[3, 5],
[3, 6],
[4, 6],
[5, 6]],
F=[[0, 1, 3],
[0, 3, 2],
[1, 4, 3],
[2, 3, 5],
[3, 6, 5],
[3, 4, 6]])
caf = CnstrTargetFace(F=[r_, s_, 4 * 0.4 * t_ * r_ * (1 - r_ / 3)])
ff = FormFinding(cp=cp, n_steps=1)
ff.tf_lst = [(caf, [0, 1, 2, 3, 4, 5, 6])]
# Unfolding
uf = Folding(cp=ff.cp, tf_lst=ff.tf_lst, n_steps=10)
uf.unfold = True
print 'x_t', uf.x_t[-1]
from oricrete.folding2 import CreasePattern, Folding, CreasePatternView
triangle = CreasePattern(X=[[0, 0, 0],
[1, 0, 0],
[1, 1, 0]],
L=[[0, 1],
[1, 2],
[2, 0]],
F=[[0, 1, 2]]
)
lift = Folding(cp=triangle,
n_steps=10,
dof_constraints=[([(0, 0, 1.0)], 0.0),
([(0, 1, 1.0)], 0.0),
([(0, 2, 1.0)], 0.0),
([(1, 1, 1.0)], 0.0),
([(1, 2, 1.0)], 0.0),
([(2, 2, 1.0)], 0.5)
]
)
lift.U_0[8] = 0.1
v = CreasePatternView(root=lift.source)
v.configure_traits()
