I can change the transformation matrix to make a model moves in 3d view. But how can I do the opposite that move and rotate a model in 3d view and get its transformation matrix? Any method or suggestion? Thanks.

If I understand correctly what you’d like to do, here are the steps: Turn on interactive transform for the model in the Data module (right click the eye not the name) [image] Transform the model using the controls [image] See the matrix in the Transforms module [image] You’ll need a …

https://slicer.readthedocs.io/en/latest/user_guide/modules/transforms.html

Thank you pieper. But I can’t understand. In fact, the key of my problem is how I can move a model directly in the 3D view,not in the transformation panel. Perhapes, it need a widget?

[image] tdchen: how I can move a model directly in the 3D view, What do you mean by that? You can use the mouse clicks to rotate/translate a model in 3D view. But that only changes the angle camera is seeing the model. If you want to modify its orientation, you need to use the transforms modu…

I think there’s no such feature available at the moment. If I understood correctly, you would like to interact with the module similarly as you do with a markup list. We achieve a similar behaviour with some custom models (e.g. screws), by reusing a set of slicer nodes (markuplist, model_nodes and…

Thank you muratmaga Yes, I can change orientation of models with transform module. But it is uneasy to control. I want to design a cutting position with mouse in 3d view, and get the corresponding transform.

You understand me, Davide_Scorza. I really want to know if there is an available module to do it. Now that you’ve told me, I’m ready to program. Sorry for my poor English.

I never find a way to do that easily with slicer, so I use to do a reslicing with the 3D MPR(multi planar rendering) tool in Horos, export the new set then import this volume to slicer, which give you the volume and the .h5 file which is the transform, you can just aply or harden, as you wish

Hello tdchen, As per my knowledge, To extract a transformation matrix from a 3D model’s movement and rotation, track applied transformations programmatically or use 3D graphics libraries. In code, maintain variables for translation and rotation, composing them into a final matrix. In addition, leve…

Yes, philippepellerin. We have plan that export data to other software and get the transformation.

Thanks for your suggestion, emmawilson. I think Slicer must have the ability to realize your plan, and I need to find it.

Is it possible to move and rotate a model in 3d view and get the transformtion matrix?

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cpinter (Csaba Pinter) May 8, 2024, 4:07pm 15

Download the preview version from https://download.slicer.org/

That is a different function. Look at my screenshots please and you’ll see.

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Is it possible to move and rotate a model in 3d view and get the transformtion matrix?

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