open-discussion
open-discussion > RE: Problem with SPHARM-PDM on new dataset!
Nov 4, 2016 03:11 PM | Martin Styner
RE: Problem with SPHARM-PDM on new dataset!
magNormDir computes the dot product
between the provided vector field and the local normal vectors,
i.e:
MeshMath a.meta -magNormDir difference.txt
=>
1. proj_i = dot(difference_i, norm(a_i))
2. output_i = abs(proj_i) * sign(proj_i)
at the i-th vertex (the normal is of unit length)
The code for this is here:
https://github.com/NIRALUser/SPHARM-PDM/...
look at lines 3668-3683 (warning, this is not nicely designed code, but rather quiet ugly, historically accumulated code)
Martin
Originally posted by Nazanin M:
MeshMath a.meta -magNormDir difference.txt
=>
1. proj_i = dot(difference_i, norm(a_i))
2. output_i = abs(proj_i) * sign(proj_i)
at the i-th vertex (the normal is of unit length)
The code for this is here:
https://github.com/NIRALUser/SPHARM-PDM/...
look at lines 3668-3683 (warning, this is not nicely designed code, but rather quiet ugly, historically accumulated code)
Martin
Originally posted by Nazanin M:
Dear Martin,
Thanks for your response. That's a great news! Hope it gets released soon.
I just have one quick question regarding -magNormDir function in MeshMath. From what I understood, it calculates the signed magnitude of projection of difference vector to another vector. So for example if we have:
MeshMath a.meta -magNormDir difference.txt
then the mathematics behind it would be :
dot_product(difference, a)/norm(a)
Is this correct? I have compared the results of MeshMath, and my own calculations using the above formula but they are not the same.. Would you please let me know where I'm making a mistake?
I really appreciate it.
Thanks,
Thanks for your response. That's a great news! Hope it gets released soon.
I just have one quick question regarding -magNormDir function in MeshMath. From what I understood, it calculates the signed magnitude of projection of difference vector to another vector. So for example if we have:
MeshMath a.meta -magNormDir difference.txt
then the mathematics behind it would be :
dot_product(difference, a)/norm(a)
Is this correct? I have compared the results of MeshMath, and my own calculations using the above formula but they are not the same.. Would you please let me know where I'm making a mistake?
I really appreciate it.
Thanks,
Threaded View
| Title | Author | Date |
|---|---|---|
| Nazanin M | Sep 27, 2016 | |
| Nazanin M | Nov 4, 2016 | |
| Martin Styner | Nov 10, 2016 | |
| Nazanin M | Dec 26, 2016 | |
| Martin Styner | Jan 2, 2017 | |
| Nazanin M | Jan 2, 2017 | |
| Martin Styner | Jan 5, 2017 | |
| Nazanin M | Jan 11, 2017 | |
| Martin Styner | Jan 17, 2017 | |
| Nazanin M | Jan 17, 2017 | |
| Nazanin M | Jan 17, 2017 | |
| Nazanin M | Nov 2, 2016 | |
| Martin Styner | Nov 4, 2016 | |
| Antoine Bouyeure | Oct 30, 2016 | |
| Martin Styner | Oct 31, 2016 | |
| D J | Nov 1, 2016 | |
| Antoine Bouyeure | Nov 1, 2016 | |
| Martin Styner | Nov 1, 2016 | |
| Antoine Bouyeure | Oct 29, 2016 | |
| Nazanin M | Oct 30, 2016 | |
| Martin Styner | Oct 31, 2016 | |