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fix an issue with bc

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This commit is contained in:
lucidrains 2025-10-25 12:27:28 -07:00
parent f97d9adc97
commit cf7c237334
2 changed files with 12 additions and 3 deletions
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13
dreamer4/dreamer4.py
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@ -284,7 +284,7 @@ def create_multi_token_prediction_targets(
batch, seq_len, device = *t.shape[:2], t.device
batch_arange = arange(batch, device = device)
seq_arange = arange(seq_len, device = device)[1:]
seq_arange = arange(seq_len, device = device)
steps_arange = arange(steps_future, device = device)
indices = add('t, steps -> t steps', seq_arange, steps_arange)
@ -3100,7 +3100,7 @@ class DynamicsWorldModel(Module):
reward_pred = rearrange(reward_pred, 'mtp b t l -> b l t mtp')
reward_targets, reward_loss_mask = create_multi_token_prediction_targets(two_hot_encoding, self.multi_token_pred_len)
reward_targets, reward_loss_mask = create_multi_token_prediction_targets(two_hot_encoding[:, :-1], self.multi_token_pred_len)
reward_targets = rearrange(reward_targets, 'b t mtp l -> b l t mtp')
@ -3126,6 +3126,15 @@ class DynamicsWorldModel(Module):
):
assert self.action_embedder.has_actions
# handle actions having time vs time - 1 length
# remove the first action if it is equal to time (as it would come from some agent token in the past)
if exists(discrete_actions) and discrete_actions.shape[1] == time:
discrete_actions = discrete_actions[:, 1:]
if exists(continuous_actions) and continuous_actions.shape[1] == time:
continuous_actions = continuous_actions[:, 1:]
# only for 1 agent
agent_tokens = rearrange(agent_tokens, 'b t 1 d -> b t d')

2
pyproject.toml
View File

@ -1,6 +1,6 @@
[project]
name = "dreamer4"
version = "0.0.75"
version = "0.0.76"
description = "Dreamer 4"
authors = [
{ name = "Phil Wang", email = "lucidrains@gmail.com" }