Hello,

I am new to Houdini and having a really difficult time trying to instance my leaves from a tree model I created inside Speedtree. I am importing the speedtree model as an alembic.

1. I have pulled the transformation matrix and promoted them to points, however when I copy grid to points the transformation is repeating the same number over every point leaving me with no transformation.


2. I have pulled the orient attribute to points used a for each loop to extract points and packed inside the loop, this way gets me closer, some transformation but it is not the same as the original orientation.

Hi,
I think you should try first to convert your "transform" matrix into quaternion and get an @orient attribute on points
Try to do this in VOP or VEX

take a look at this maybe :
https://www.sidefx.com/docs/houdini/nodes/vop/matxtoquat.html [www.sidefx.com]

https://www.sidefx.com/docs/houdini/vex/functions/quaternion [www.sidefx.com]

you can find as well interesting stuff here : https://www.tokeru.com/cgwiki/index.php?title=JoyOfVex17#Orient_via_matrix [www.tokeru.com]