TRBF output

[Hansello218]

When using radial basis functions to represent opacity, I noticed that the computation method provided in your code does not match the calculation method given in the equation 7 of the paper. Could you please clarify this?

[lizhan17]

it is a parametric trick (logrithim of s), now trbfoutput is in range (0 to1) to make sure final opacity range is (0 to1).

if you take the rbf function return torch.exp(-1*x.pow(2)), you can get torch.exp(-1*(offset / exp(trbfscale)).pow(2)), same as
torch.exp(-1*(offset * exp(-trbfscale)).pow(2)), where -1*(offset * exp(-trbfscale)).pow(2) is same as -1*offset.pow(2)* exp(-trbfscale).pow(2), is same as -1* exp(-trbfscale).pow(2)*offset.pow(2) -1* exp(-2trbfscale)*offset.pow(2)

[Hansello218]

It's correct.Thanks a lot!