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Matrix Houdini point clouds in Clarisse

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Matrix Houdini point clouds in Clarisse

Unread postby Dertubiz » Tue Feb 05, 2019 11:37 am

Hi everyone, I figure a problem when I export a point cloud from Houdini to Clarisse.

I follow exactly this tutorial :
https://www.youtube.com/watch?v=mWAYyQ0dG3o

For the example, I used points in a circle in Houdini, and copy on this points cubes with a rotate and a scale attribute.
I export these attributes in a 4x4 Matrix, which contains rotate and scale information (screen 1)

01_PointCloud_Generate_FromHoudini.PNG


Then, I tried to reuse this attributes in Houdini, for check if the matrix is useable. And it is (screen 2)

02_PointCloud_ReapplyTransform_InHoudini.PNG


And Finaly, I've imported my point cloud in Clarisse, export the attributes with extract property nodes and...
I have a totaly different result (screen 3)

03_PointCloud_ReapplyTransform_InClarisse.PNG


When I inspect the log view, i had this message :
GeometryAbcPointCloud: property "clarissexform" was remapped from [400][1] to [25][16] to match point count (in object "/Debug_PointCloud/OUT_PointCloud" from file "I:/Clarisse_PointCloud_Debug/Export_PointCloud.abc").

I tried several rotation orders but I didn't figure how to had a good result.

I don't know where the problem come from, so I post here :)
Dertubiz
 
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Re: Matrix Houdini point clouds in Clarisse

Unread postby isoyann » Tue Feb 05, 2019 2:42 pm

Hi,

I tried to quickly reproduce your setup, it seems to work.. the log message is not a problem to get the right orientation.

h2clarisse.zip
(29.38 KiB) Downloaded 35 times


pcloudrotationmatrix.jpg


Cheers,

Yann
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isoyann
 
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Re: Matrix Houdini point clouds in Clarisse

Unread postby Dertubiz » Thu Feb 07, 2019 8:41 pm

Thanks for the reply, it works if you export only a rotation.
If you add a scale attribute, it stop work.
I used normalized geometry in my case, I needed both scale and rotation.

I use your scene and add a scale attribute in Houdini. Back in Clarisse I had a totally different thing(screen)

PointCoudDebug_Houdini.JPG

PointCoudDebug_Clarisse.JPG




I had a solution to make it work, I export a quaternion for the rotate and a three float for the scale but I want to know why the Matrix are not working
Dertubiz
 
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Re: Matrix Houdini point clouds in Clarisse

Unread postby isoyann » Fri Feb 08, 2019 5:31 pm

Another solution is separate the scale and rotation in houdini, to only export a rotation matrix.. the transform order is different and can't be controlled inside Clarisse.

Cheers,

Yann
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isoyann
 
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Re: Matrix Houdini point clouds in Clarisse

Unread postby Dertubiz » Fri Feb 08, 2019 10:25 pm

Okay,
thanks for the reply !
Maybe it can be interesting to update the tutorial if it doesn't work.
The pointClouds are an amazing way to bring geometry inside Clarisse.
I've spent time to research how to export my Point Clouds with the right attributes and I hope that no one has to spend it anymore.

Cheers :)
Dertubiz
 
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Joined: Tue May 22, 2018 9:25 pm


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