Re: AW: [Algorithms] Large landscapes

[Mohammad A. <moh...@op...>]

correct me if I am wrong:
The wavelets is a basis function that is used to change a complex 
function or operation into simple operations that can be done on the CPU 
or the GPU. one of the advantages of wavelets over other basis functions 
is the need for a small no of coefficients to represent the original 
function so it is a good compression method.But the problem with the 
wavelets is that it needs operations that are not very suitable to 
current hardware,so when  uncompressing it needs complex operations 
which makes it slow.for example, the lighting of a small model when 
calculated using compressed wavelets runs at 30 fps on 9700 pro, so it 
can not be used in a game now.
If you are thinking of using a basis function to compress the heights of 
the terrain, find another simpler basis function. wavelets have a lot of 
complex properties that you don't need as being rotationally invariant 
for example.
Also I think that he wants to compress and represent a lot of dynamic 
data more than just the heights of the terrain, which is not a problem.

Muhammad Adel

"The secret to creativity is knowing how to hide your sources".Einstein



Christian Schüler wrote:

>Hi everyone.
>
>If your goal is to save on disk space, you could try wavelet compression of the terrain heights.
>Wavelets would also give you a multiresolution solution for free.
>
>
>
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