Comments (9)
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Thanks. I've implemented unscreened Poisson by myself. Maybe due to different ways of implementation, I have to use an extra factor to adjust the weight among different levels ( x(p) = sum(factor * xi * Bi(p) ). Right now I try to implement the screened Poisson, however the adaptive weight of the screen term ( 2^d ) described in your paper just doesn't work for my code. Anyway I will be trying. Thanks.
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Hi. Where can I find the standard B-spline prolongation stencil ? Could you give me some help ?
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Much thanks. I've found this 1D stencil described in your V4 Poisson code comments. But I was not so sure.
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Hi, I have another question about the prolongation. I use the 2 degree B-spline and the prolongation stencil is {1/4, 3/4, 3/4, 1/4}. For example, in 1D, if the solution of a node T in depth D-1 is b(T), and the B-spline range of the node is [-1.5w, 1.5w], then the prolonged solutions of related 6 nodes in depth D are {0,1/4, 3/4, 3/4, 1/4,0} * b(T) ? To my understanding, it's like this:
node T in depth D - 1:
|-------------|
b(T)
nodes in depth D covered by node T:
|------|------|------|------|------|------|
0 0.75b(T) 0.25b(T)
0.25b(T) 0.75b(T) 0
But when there are some neighbor nodes T1,T2,... in depth D-1, how to compute the prolonged solution in overlap nodes in depth D ?
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Hi. I just accumulate those prolonged solutions of depth D - 1 nodes for overlapped depth D nodes. It works. Much thanks. Finally I get the same quality and accuracy mesh compared with mesh generated by your codes.
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Related Issues (20)
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