def forward(self, inputs):
"""
Args:
inputs: graph object
Returns:
"""
features = np.ones([inputs.n, 1], dtype=np.float32) # initialize the feature matrix
features = torch.FloatTensor(features)
adj_M = torch.FloatTensor(inputs.M) # adj matrix of input graph
x = torch.nonzero(adj_M)
adj_M = utils.to_sparse(adj_M) # convert to coo sparse tensor
if self.use_cuda:
adj_M = adj_M.cuda()
features = features.cuda()
probs = self.actor(features, adj_M) # call actor to get a selection distribution
probs = probs.view(-1)
m = Categorical(probs)
node_selected = m.sample()
# node_selected = probs.multinomial() # choose the node given by GCN (add .squeeze(1) for batch training)
log_prob = m.log_prob(node_selected)
if self.use_critic: # call critic to compute the value for current state
critic_current = self.critic(features, adj_M).sum()
r = inputs.eliminate_node(node_selected, reduce=True) # reduce the graph and return the nb of edges added
features = np.ones([inputs.n, 1], dtype=np.float32) # initialize the feature matrix
features = torch.FloatTensor(features)
adj_M = torch.FloatTensor(inputs.M) # adj matrix of reduced graph
adj_M = utils.to_sparse(adj_M) # convert to coo sparse tensor
if self.use_cuda:
adj_M = adj_M.cuda()
features = features.cuda()
if self.use_critic: # call critic to compute the value for current state
critic_next = self.critic(features, adj_M).sum()
return node_selected, log_prob, r, critic_current, critic_next, inputs
def spiral_tramsform(transform_fp, template_fp, ds_factors, seq_length,
dilation):
if not osp.exists(transform_fp):
print('Generating transform matrices...')
mesh = Mesh(filename=template_fp)
# ds_factors = [3.5, 3.5, 3.5, 3.5]
_, A, D, U, F, V = mesh_sampling.generate_transform_matrices(
mesh, ds_factors)
tmp = {
'vertices': V,
'face': F,
'adj': A,
'down_transform': D,
'up_transform': U
}
with open(transform_fp, 'wb') as fp:
pickle.dump(tmp, fp)
print('Done!')
print('Transform matrices are saved in \'{}\''.format(transform_fp))
else:
with open(transform_fp, 'rb') as f:
tmp = pickle.load(f, encoding='latin1')
spiral_indices_list = [
utils.preprocess_spiral(tmp['face'][idx], seq_length[idx],
tmp['vertices'][idx],
dilation[idx]) #.to(device)
for idx in range(len(tmp['face']) - 1)
]
down_transform_list = [
utils.to_sparse(down_transform) #.to(device)
for down_transform in tmp['down_transform']
]
up_transform_list = [
utils.to_sparse(up_transform) #.to(device)
for up_transform in tmp['up_transform']
]
return spiral_indices_list, down_transform_list, up_transform_list, tmp
mesh = Mesh(filename=template_fp)
ds_factors = [4, 4, 4, 4]
_, A, D, U, F = mesh_sampling.generate_transform_matrices(mesh, ds_factors)
tmp = {'face': F, 'adj': A, 'down_transform': D, 'up_transform': U}
with open(transform_fp, 'wb') as fp:
pickle.dump(tmp, fp)
print('Done!')
print('Transform matrices are saved in \'{}\''.format(transform_fp))
else:
with open(transform_fp, 'rb') as f:
tmp = pickle.load(f, encoding='latin1')
edge_index_list = [utils.to_edge_index(adj).to(device) for adj in tmp['adj']]
down_transform_list = [
utils.to_sparse(down_transform).to(device)
for down_transform in tmp['down_transform']
]
up_transform_list = [
utils.to_sparse(up_transform).to(device)
for up_transform in tmp['up_transform']
]
model = AE(args.in_channels,
args.out_channels,
args.latent_channels,
edge_index_list,
down_transform_list,
up_transform_list,
K=args.K).to(device)
print(model)