Forums Houdini Indie and Apprentice Calc two pairs vectors align matrix

Calc two pairs vectors align matrix

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jerry7
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Hi,
I want align two direction vectors(blue) to another two(red). The source and target vectors has same angle. They are all in 3d space ,not 2d.
How to get the transfrom matrix?

Thanks!
Edited by - 2015年2月18日 09:46:50

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matrix.png (9.6 KB)

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animatrix_
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matrix3 m = dihedral ( from1, to1 );
from1 *= m;
from2 *= m;
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jerry7
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pusat
matrix3 m = dihedral ( from1, to1 );
from1 *= m;
from2 *= m;

Thanks, sorry I does not express clearly. The four vectors is not co-planar. Any three of them are not co-planar.
Once align just can align from1-to1, not from2-to2.
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Aizatulin
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Hi,

i've created a simple example. You can check the inline code inside the vop.
I hope this is working like you are expecting, but I think there should be an easier and faster way to do this.

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example.hipnc (73.3 KB)

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jerry7
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thanks, I will have some time to study it.

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Aizatulin
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Hi,

here is another example, where I used the orthogonal systems from two vectors (V,W):
V, VxW, Vx(VxW) which are defined, if V and W are not collinear.
So you can make the matrix from the system. I made some quick and dirty functions in VEX, but I would always replace them by standard functions, if exists and yes I hadn't used this forum for a long while, but if i am posting more, I will lose my Lurker status ^^.

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other_example.hipnc (84.9 KB)

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