grab is too fast when using millimeters in perspective view

[mirlip]

Hi, When using the grab tool near 0, it moves really good. But if you work in millimetre, and want to move an object that is on meter away from 0, it will start to make big jumps instead of smooth translations in perspective view (orthogonal works great). Would it be possible to make the grab movement constantly fast to make it possible to work in millimetres in perspective view? Regards

[mauge123]

is this a mechanical blender issue or a blender issue ?

[mirlip]

It is a Blender issue, but I don't think it will be recognised as a bug but more as a limitation, like most of the things that have to do with precision at the moment. I guess the move steps are not linear in space. So it should only be a matter of making the object transform a linear equation of the mouse movement. Like object delta (Blender Unit) = mouse delta (Pixel). Ideal would be to make the object stay under the mouse cursor now that we have the free view during transform.

[mauge123]

Nops, the issue was that the 3D point was calc projecting the mouse position on plane on 0,0,0.

We will not rewrite the transform code because is used in lots on places, and as was said, big changes are resulting on a pain during merges.

should be fixed on e871ecc86d7da2b817625bd82acef18b7d9bc179

[mauge123]

Now the grab is controlled, but if the objects are far away, the translation is slowest, because there is a hard coded value, that should be adjusted.

[mirlip]

Just tested the patch. It works well, but I agree the speed should be relative to the object distance to viewpoint.

[mirlip]

Hi Mauge,

The bug also appear when scaling objects in edit mode ( far away from world origin). Object mode works great.

[mauge123]

As the changes are inside transform code, affects to all transform. I solved it using a point at a fixed distance of the view origin, will be solved using a point based on selection

[mirlip]

The fix works great in object mode, but not in edit mode.

[mirlip]

Up, this is really a problem for precision modeling. Please solve it in edit mode also.

[mauge123]

Um.. works fine for me, so it may be solved on recent commits and not related.

[mirlip]

Hi, I just compiled the latest version and it's still there. If I put a cube at (3000, 3000, 3000) = 3m in all direction when working in mm and then go to edit mode and press S to scale (in perspective view), the cube becomes instantly extremely big. This doesn't happen in object mode thanks to the fix, it also doesn't happen in edit mode if in the orthogonal top view.

[mauge123]

It was not working in the case the object origin was far away from origin. Now should be fixed!

[mirlip]

Hi, thanks for the fix but after compiling with latest changes, the cube still becomes huge instantly when trying to scale in edit mode. You are right, it only happen when the origin of the object is "far" away from 0.

[mirlip]

Yes it works now, thank you :) Really great addition :)

[mauge123]

;)