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

theoryshaw

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

Moult

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

theoryshaw

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: https://www.dropbox.com/scl/fi/meqnukp2kaig18s2cn535/2023-08-20_09-50-40_KeyShowView_Carnac.mp4?rlkey=4rkovlhh5hpjieanh568r9rjw&dl=0
files, if you need them: https://gitlab.com/openingdesign/milwaukee_st_4429/-/tree/aa931947aa4dadf8492dae9c1f56c6b03927b02e/Models/BlenderBIM

Moult

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?

theoryshaw

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)_/¯

Gorgious

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) ?

theoryshaw

Is this what you mean?
Happens with other objects too.. not just this door.

theoryshaw

oh, i think you meant the camera...