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Position Rotation Anchor

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Oz Perrenoud
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Position Rotation Anchor : When clicking on the symbol with the arrows in the Rotation Anchor, in the Position Rotation Anchor, in addition to fill in the data, provide pre-established options, such as : (x0); (y0); z(0); (x0,z0); (x0,y0); (z0,y0); (x0,y0,z0).

Lars Wernlund
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That's awfully specific. Could you please describe the situation / scenario you would be using this in?

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Oz Perrenoud
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For example, I want to set the Rotator Angle to x0, y0, z0 to create copies around the project's spatial center.

Currently, one way would be to go to Top View, set x to 0, z to 0, then switch my camera to Front View and finally set y to 0, ensuring the rotator anchor is centered in 3D space.

Having the x=0, y=0, and z=0 options to be set individually (marking the box) would be much simpler because it would keep the view-specific items highlighted, but I could change all including the value that isn't displayed in the current view to 0.

Lars Wernlund
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Unless I'm missing something here, the y coordinate does not matter at all in a top view?

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Oz Perrenoud
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Well, now something pops into my head that I hadn't realized until today.
The positioning of the rotator anchor is directly related to the view I'm viewing, meaning it doesn't change its position for alpha, beta, and gamma at the same time. I think this means they are, in fact, three independent anchors.
I can only position it at the 3D spatial center (x0, y0, z0) of a view, and its position on the third axis (the one not visible in the camera used) really doesn't make any difference in that case.
To achieve what I'm trying to do, they should be connected as if they were a single unit.
 

All that remains of my request is to have a square to quickly mark a position at zero according to the camera used, like this for top view, for example:

Lars Wernlund
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So in this case you are in a top view (since Y is disabled). I'm not sure at all that it's a very common task to set the X or Z coordinates to 0 then? What is the situation that prompts you to do so? 

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Oz Perrenoud
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I reread the entire post, and perhaps I didn't explain myself perfectly.

I wish the Rotator Anchor, not the object itself, could clearly state where the copies would originate.

Yes, it's very similar to Transform by absolute values.

From everything we've talked about, it seems that all that's left is the boxes to reset the x, y, and z coordinates to zero with one click.