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When G'ing, with no snaps, and constraining to an axis like 'Y', why does it jump around like this?

1. T by theoryshaw on 19 Aug 2023, edited 21 Aug 2023 #

   Simple blender question.

   When G'ing, with no snaps, and constraining to an axis like 'Y', why does it jump around like this?

   

2. M by Moult on 20 Aug 2023 #

   Potentially a bug in Blender itself. Can somebody recreate this in vanilla?

3. T by theoryshaw on 20 Aug 2023 #

   Upon further troubleshooting, it seems it might be related to the BB drawing view.

   It jumps in the BB drawing, but when i enter overall 3D view, it doesn't jump anymore.

   video:

   files, if you need them: https://gitlab.com/openingdesign/milwaukee_st_4429/-/tree/aa931947aa4dadf8492dae9c1f56c6b03927b02e/Models/BlenderBIM

4. M by Moult on 20 Aug 2023 #

   Are you sure it's specific to a BB drawing camera? Can you try just add a regular Blender camera (orthographic, same rotation) and see what happens?

5. T by theoryshaw on 21 Aug 2023, edited 21 Aug 2023 #

   This is weird. When I first enter the FLOOR PLAN - 1ST drawing the door jumps around when i move it.

   • then i create a new vanilla camera, in the same-ish position, then the door moves smoothly.

   • When i go back to FLOOR PLAN - 1ST the door moves smoothly again. ¯\(ツ)/¯

6. G by Gorgious on 21 Aug 2023 #

   I think this is a vanilla Blender bug, I guess from funky camera - to - world - coordinates ? I'm pretty sure it happened to me several times, and outside of Bbim. Are your scale transforms applied (1, 1, 1) ?

7. T by theoryshaw on 21 Aug 2023 #

   Is this what you mean?

   Happens with other objects too.. not just this door.

   

8. T by theoryshaw on 21 Aug 2023 #

   oh, i think you meant the camera...

   

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