How to move object or rotate the object interactively ?

[OhmPuchiss]

I want to rotate and translate an object interactively.

[OhmPuchiss]

I figure it out. Just pressing button a. I have a second question how do we scale an object (i.e. similar to blender by pressing s and moving left or right).

[marcomusy]

you right-click and drag the mouse.

[OhmPuchiss]

Dear Marco, Is there anyway we can access the axis of the object and its orientation ? I want to do thing similar to this post. However, I would like to define my own transformation matrix, button and much more. Therefore, is there anyway can I get the information about orientation and axis of the object ?

[marcomusy]

Sure you can access it by

myobj.transform

and

myobj.transform.matrix

To apply a trasformation to a specific object you can use

myobj.apply_transform(...)

[OhmPuchiss]

Hey Marco, Is there any way to make the line rotate or move together with the object (the purple one) when using mouse to move or rotate the object ?

[marcomusy]

Yes you can create an Assembly:

assem = myline + myobj
show(assem)

[marcomusy]

Did you manage to do it?

[OhmPuchiss]

Since vedo is made on VTK, Can you create a python code to make this function ?

[OhmPuchiss]

I am not good at coding yet and I believe you could help me to create something like this in vedo.

[marcomusy]

You can create a picture-in-picture rendering with any sort of 3d object or axes. This is a good example to start with https://github.com/marcomusy/vedo/blob/master/examples/other/inset.py https://github.com/marcomusy/vedo/tree/master/examples/other/icon.py https://github.com/marcomusy/vedo/tree/master/examples/volumetric/slicer1.py

[OhmPuchiss]

thank you for your assistance. I have one question. When we apply the transformation, the mesh.vertices still have the ols data from the dataset. How do we get the new coordinate information after transformation ?.

[OhmPuchiss]

*old

[marcomusy]

No, mesh.vertices will hold the new coordinates after .apply_transform(T)

[OhmPuchiss]

I think I combine the mesh and other mesh into assembly and when I apply transformation matrix. The mesh.vertices inside the assembly data still hold the old data.