Zooming on Viewport with Trackpad on Mac Uncontrollably Fast at Top of Viewport #122077

New Issue

philovivero · 2024-05-22T01:24:56+02:00

philovivero commented

2024-05-22 01:24:56 +02:00

System Information
Operating system: macOS-13.6.7-arm64-arm-64bit 64 Bits
Graphics card: Metal API Apple M2 Ultra 1.2

Blender Version
Broken: version: version: 4.0.2, branch: blender-v4.0-release, commit date: 2023-12-05 07:41, hash: 9be62e85b727
Worked: This has been like this forever. It just now finally occurred to me to report it as a bug, since it's really annoying and although I've learned not to zoom in/out from the top of the viewport 99% of the time, sometimes I do it accidentally.

Short description of error
Zooming is normal speed if your OS cursor is most places on the 3D viewport, but if at the very top, zooming in/out goes at such a rapid pace you can barely control it (and in any case, it's so different from the behaviour in the other parts of the viewport you won't expect the speed at which it happens).

Exact steps for others to reproduce the error
Go to a 3D viewport on default scene. Zoom in/out using trackpad (I suspect using mouse wheel based zoom will do the same thing, but I'm not sure). Put your cursor in the bottom of the viewport. Zoom in/out a few times. Do it in the centre a few times. So far zooming in/out should work about like you expect. Now put your cursor nearly at the very top of the 3D viewport and zoom in/out. Notice it zooms in/out so fast that you lose control, and you zoom out into space, or zoom in to atomic level very quickly.

I've also attached an MP4 of the behaviour. Notice in 1st half, I start from default scene, where I guessed maybe it's because it's zooming in/out from far in the distance (like somehow the OS cursor is aware of the depth of the scene where it lies?) but when I spin the view in the second half of the video, where "far" is at the bottom and "close" is at the top, the behaviour does not reverse.

If this is a "feature" where zoom speed is very different depending on where in the viewport the OS cursor is, I would very much like to disable it and have the same speed everywhere in the 3D viewport.

**System Information** Operating system: macOS-13.6.7-arm64-arm-64bit 64 Bits Graphics card: Metal API Apple M2 Ultra 1.2 **Blender Version** Broken: version: version: 4.0.2, branch: blender-v4.0-release, commit date: 2023-12-05 07:41, hash: `9be62e85b727` Worked: This has been like this forever. It just now finally occurred to me to report it as a bug, since it's really annoying and although I've learned not to zoom in/out from the top of the viewport 99% of the time, sometimes I do it accidentally. **Short description of error** Zooming is normal speed if your OS cursor is most places on the 3D viewport, but if at the very top, zooming in/out goes at such a rapid pace you can barely control it (and in any case, it's so different from the behaviour in the other parts of the viewport you won't expect the speed at which it happens). **Exact steps for others to reproduce the error** Go to a 3D viewport on default scene. Zoom in/out using trackpad (I suspect using mouse wheel based zoom will do the same thing, but I'm not sure). Put your cursor in the bottom of the viewport. Zoom in/out a few times. Do it in the centre a few times. So far zooming in/out should work about like you expect. Now put your cursor nearly at the very top of the 3D viewport and zoom in/out. Notice it zooms in/out so fast that you lose control, and you zoom out into space, or zoom in to atomic level very quickly. I've also attached an MP4 of the behaviour. Notice in 1st half, I start from default scene, where I guessed maybe it's because it's zooming in/out from far in the distance (like somehow the OS cursor is aware of the depth of the scene where it lies?) but when I spin the view in the second half of the video, where "far" is at the bottom and "close" is at the top, the behaviour does not reverse. If this is a "feature" where zoom speed is very different depending on where in the viewport the OS cursor is, I would very much like to disable it and have the same speed everywhere in the 3D viewport.

Blender-Zoom-Bug.mp4

7.3 MiB

philovivero added the

labels 2024-05-22 01:24:57 +02:00

Alaska commented

2024-05-22 07:49:51 +02:00

I can confirm this issue with a trackpad, and it seems to be a bug. I can not confirm this issue with a mouse.

As the user pointed out, the speed at which you zoom in when using multi-touch gestures on the trackpad is determined by the position vertically in the viewport. The "fast" speed I experience is quite a bit slower than @philovivero shows in their video, but there is still a speed difference.

The reason I think this is a bug is because the axis that changes the speed of zoom is determined by the User Preferences -> Navigation -> Zoom -> Zoom Axis setting (defaulted to vertical). So if I set it to horizontal, then the speed is determined by the horizontal position of the cursor. To my knowledge, this setting is only supposed to change the direction you have to move your mouse to zoom while using the zoom widget, or while holding control + middle mouse button, not the speed at which multi-gesture zoom occurs at.

System Information
Operating system: macOS-14.4.1-arm64-arm-64bit 64 Bits
Graphics card: Metal API Apple M1 Pro 1.2
Blender version: version: 4.1.1, branch: blender-v4.1-release, commit date: 2024-04-15 15:11, hash: e1743a0317bc

I can confirm this issue with a trackpad, and it seems to be a bug. I can not confirm this issue with a mouse. As the user pointed out, the speed at which you zoom in when using multi-touch gestures on the trackpad is determined by the position vertically in the viewport. The "fast" speed I experience is quite a bit slower than @philovivero shows in their video, but there is still a speed difference. The reason I think this is a bug is because the axis that changes the speed of zoom is determined by the `User Preferences -> Navigation -> Zoom -> Zoom Axis` setting (defaulted to vertical). So if I set it to horizontal, then the speed is determined by the horizontal position of the cursor. To my knowledge, this setting is only supposed to change the direction you have to move your mouse to zoom while using the zoom widget, or while holding `control + middle mouse button`, not the speed at which multi-gesture zoom occurs at. **System Information** Operating system: macOS-14.4.1-arm64-arm-64bit 64 Bits Graphics card: Metal API Apple M1 Pro 1.2 Blender version: version: 4.1.1, branch: blender-v4.1-release, commit date: 2024-04-15 15:11, hash: `e1743a0317bc`

Alaska added

and removed

labels 2024-05-22 07:51:15 +02:00

Yevgeny Makarov commented

2024-05-23 21:22:33 +02:00

Maybe the same thing as here #92221

Zoom in/out using trackpad (I suspect using mouse wheel based zoom will do the same thing, but I'm not sure).

Mouse wheel based zoom is a different operator.
Pinch zoom gesture, Cmd + trackpad scroll, or Cmd + MMB-drag do the same thing.

Maybe the same thing as here https://projects.blender.org/blender/blender/issues/92221 *** > Zoom in/out using trackpad (I suspect using mouse wheel based zoom will do the same thing, but I'm not sure). Mouse wheel based zoom is a different operator. Pinch zoom gesture, Cmd + trackpad scroll, or Cmd + MMB-drag do the same thing.

philovivero commented

2024-05-23 23:29:36 +02:00

The "fast" speed I experience is quite a bit slower than @philovivero shows in their video, but there is still a speed difference.

I actually zoomed with less speed at the top in my video, because if I use the same amount of trackpad movement, it goes so crazy you can't even tell what happened. The default scene just disappears because it zooms so far out/in.

So whatever this bug is, it affects me way more than you. Maybe due to how my trackpad cursor acceleration is set or something.

> The "fast" speed I experience is quite a bit slower than @philovivero shows in their video, but there is still a speed difference. I actually zoomed with less speed at the top in my video, because if I use the same amount of trackpad movement, it goes so crazy you can't even tell what happened. The default scene just disappears because it zooms so far out/in. So whatever this bug is, it affects me way more than you. Maybe due to how my trackpad cursor acceleration is set or something.

Alaska commented

2024-05-24 01:17:52 +02:00

Maybe the same thing as here #92221

They seem to be somewhat related because disabling Use mouse position as mentioned in #92221 (comment) does resolve the issue.

> Maybe the same thing as here https://projects.blender.org/blender/blender/issues/92221 They seem to be somewhat related because disabling `Use mouse` position as mentioned in https://projects.blender.org/blender/blender/issues/92221#issuecomment-184262 does resolve the issue.

philovivero commented

2024-05-25 02:12:47 +02:00

I guess I should mention that it doesn't matter if I slide right/left or up/down, they both zoom in/out.

Maybe the source of the bug is that the vertical/horizontal setting mentioned earlier somehow does not apply on a trackpad, and so some edge case gets hit?

But also, from #92221...

Place the cursor at the top of the 3D View, zoom by dragging up/down with Ctrl-MMB, the speed will be high.
Place the cursor at the bottom of the 3D View, zoom by dragging with Ctrl-MMB, speed is slow.

Yeah, that sounds like a probable same-bug.

disabling Use mouse position

I definitely will live with the bug rather than disable that feature. I use it literally dozens of times a minute.

I guess I should mention that it doesn't matter if I slide right/left or up/down, they both zoom in/out. Maybe the source of the bug is that the vertical/horizontal setting mentioned earlier somehow does not apply on a trackpad, and so some edge case gets hit? But also, from #92221... > Place the cursor at the top of the 3D View, zoom by dragging up/down with Ctrl-MMB, the speed will be high. > Place the cursor at the bottom of the 3D View, zoom by dragging with Ctrl-MMB, speed is slow. Yeah, that sounds like a probable same-bug. > disabling Use mouse position I definitely will live with the bug rather than disable that feature. I use it literally dozens of times a minute.

Bart van der Braak added

and removed

labels 2024-08-14 13:00:40 +02:00

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