some questions!

[Uljibuh]

Thank you for your excellent work.
I have some questions to ask.

'def forward(self, x, c, t, context_mask):'

what is 't' in the forward of the ContextUnet model?
is it a value or matrix?

'# mask out context if context_mask == 1
context_mask = context_mask[:, None]

    context_mask = context_mask.repeat(1,self.n_classes)

    context_mask = (-1*(1-context_mask)) # need to flip 0 <-> 1

    c = c * context_mask'

what is the function of the above codes? i am confused about this part.

what should I modify besides 3DContextUnet if i have 3D image ?