Extracting a rotation from 3D points

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Stevie G

I use align to vector on the x and z axis. A quick code snippet.

b\Mesh is your visible box, p[0] is your center vertet and p[5] .. p[8] are the top verlets starting from front left moving clockwise to rear left.

PositionEntity b\Mesh , EntityX( b\p[0]\pivot ) , EntityY( b\p[0]\pivot ) , EntityZ( b\p[0]\pivot )
x# = EntityX( b\p[6]\pivot ) - EntityX( b\p[5]\pivot ) + EntityX( b\p[7]\pivot ) - EntityX( b\p[8]\pivot )
y# = EntityY( b\p[6]\pivot ) - EntityY( b\p[5]\pivot ) + EntityY( b\p[7]\pivot ) - EntityY( b\p[8]\pivot )
z# = EntityZ( b\p[6]\pivot ) - EntityZ( b\p[5]\pivot ) + EntityZ( b\p[7]\pivot ) - EntityZ( b\p[8]\pivot )
AlignToVector b\Mesh, x,y,z,1 , 1
x# = EntityX( b\p[6]\pivot ) - EntityX( b\p[7]\pivot ) + EntityX( b\p[5]\pivot ) - EntityX( b\p[8]\pivot )
y# = EntityY( b\p[6]\pivot ) - EntityY( b\p[7]\pivot ) + EntityY( b\p[5]\pivot ) - EntityY( b\p[8]\pivot )
z# = EntityZ( b\p[6]\pivot ) - EntityZ( b\p[7]\pivot ) + EntityZ( b\p[5]\pivot ) - EntityZ( b\p[8]\pivot )
AlignToVector b\Mesh, x,y,z, 3 , 1

Stevie