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Rotate bends gizmo givin a world space rotation matrix
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  • AdrianG
  • Posted: 06 February 2012 11:41 PM
  • Total Posts: 22
  • Joined: 25 December 2008 10:52 PM

Hi,
I have some animated chunks exported from Thinking particles that I need to rotate the bend gizmo at a certain direction.

Here are the details:
The flat part of the chunks that I need to bend is perpendicular to X axis.
Ai need to rotate the bends gizmo axis around the X axis pointing to a world coordinates vector
The chunks have scale in them (they was exported like this), looks like all of them are uniform scaled.

Here is the calculation of rotation matrix:

vec1 = [-1.0, 0.0, 0.0] --World space need to look at vector
upVecObj = normalize ($.transform).row1 --X axis (in this case the upVector) of the chunk
vecz = normalize (cross upVecObj vec1) --Z axis perpendicular
vecy = normalize (cross upVecObj vecz) --Y axis that is trying to perserve the lookat vector
newRot = matrix3 upVecObj vecy vecz   [1,1,1] --New rotation

now I need to apply this to $.modifiers[1].gizmo.rotation non incremental (absolute)
Didn’t found any good solution…
I even tried to bring the direction vector to object space first then create the rotation matrix, still the X axis was corect but Y an Z offseted in rotation

Thanks


Replies: 2
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Have you looked at the ”Modifier Sub-Object Transform Properties” page of the maxscript help?

-Eric

Author: PiXeL_MoNKeY
Replied: 10 February 2012 10:11 AM  
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Eric, thanks for reply,
actually I’ve read that page, but it’s describing how to get the proprieties of an mod, that are in the mod space (TM).
But doesn’t that TM is defined by the object Gizmo (that I need to transform) ?
Looks like the Gizmo it is in the object space and for transforming it in absolute rotation I need to bring the worldspace matrix to the object space only.
If that is the case then the problem its the same. :(
Or maybe I’m wrong?

Author: AdrianG
Replied: 10 February 2012 09:51 PM  




   
 
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