Scale Cage doesn't work well for small/large objects #88579

New Issue

Thomas Mann · 2021-05-25T21:56:34+02:00

Thomas Mann commented

2021-05-25 21:56:34 +02:00

System Information
Operating system: Win10
Graphics card: GTX2080

Blender Version
Broken: master 2.92 / 02948a2

Short description of error
Using the scale cage to scale an object along an axis does not work properly:

Exact steps for others to reproduce the error

The click region of the handles are not correctly calculated (see video), which is hard to see, because...
The control handles don't have a hover effect (like all other gizmos), and...
The tool tip is only displayed for the outer pixel edge of the interaction zone.

My assumption is, that the hover regions are too large, overlapping, and not sorted correctly with results in unexpected behavior of scaling on two or three axis.

Adding a simple hover effect (2) would drastically improve the situation.

https://youtu.be/ZjJlZb-RuRE

2022-01-30_00-32-30.mp4

**System Information** Operating system: Win10 Graphics card: GTX2080 **Blender Version** Broken: master 2.92 / 02948a2 **Short description of error** Using the scale cage to scale an object along an axis does not work properly: **Exact steps for others to reproduce the error** 1. The click region of the handles are not correctly calculated (see video), which is hard to see, because... 2. The control handles don't have a hover effect (like all other gizmos), and... 3. The tool tip is only displayed for the outer pixel edge of the interaction zone. My assumption is, that the hover regions are too large, overlapping, and not sorted correctly with results in unexpected behavior of scaling on two or three axis. Adding a simple hover effect (2) would drastically improve the situation. https://youtu.be/ZjJlZb-RuRE [2022-01-30_00-32-30.mp4](https://archive.blender.org/developer/F12834186/2022-01-30_00-32-30.mp4)

Thomas Mann commented

2021-05-25 21:56:34 +02:00

Added subscriber: @pixtur

blender-admin commented

2021-05-25 21:56:34 +02:00

#91517 was marked as duplicate of this issue

blender-admin commented

2021-05-25 21:56:34 +02:00

#90926 was marked as duplicate of this issue

Philipp Oeser commented

2021-05-26 12:53:49 +02:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2021-05-26 12:53:49 +02:00

Changed status from 'Needs Triage' to: 'Needs Developer To Reproduce'

Philipp Oeser commented

2021-05-26 12:53:49 +02:00

are not correctly calculated

This sounds harsh, your comment about hover regions has a point though and it has come up in #61388 (Custom gizmo created with new_custom_shape are difficul to select.) before.

A little bit of how this works in this comment:

In #61388#1018376, @lichtwerk wrote:
Just a research note (if this ever comes into play again):

relevant functions:

wm_gizmomap_highlight_find

gizmo_find_intersected_3d

gizmo_find_intersected_3d_intern

If test_select is not defined specifically, this seems to go over the selection buffer and checks with 3 * U.pixelsize as well as 10 * U.pixelsize around the mouse position if it finds the gizmo in that area.
So the "margin" is defined here, lowering the value to 1 * U.pixelsize (and just provide one value) will give you a really tight selection/highlighting around your geometry.

So the situation is not perfect, esp. the hover would really help here, but it is not totally straightforward since atm. all these individual points in the scale cage are not individual wmGizmo, the whole thing is one single gizmo.
(so you could get a highlite, but only on the whole cage which is obviously not what we are after)

All in all, this does not really sound like a bug to me, more like a request for improved behavior [which this bugtracker is not meant for].
However, I would like a second pair of eyes here if the module wants to keep this as TODO.

> are not correctly calculated This sounds harsh, your comment about hover regions has a point though and it has come up in #61388 (Custom gizmo created with new_custom_shape are difficul to select.) before. A little bit of how this works in this comment: > In #61388#1018376, @lichtwerk wrote: > Just a research note (if this ever comes into play again): > > relevant functions: > - `wm_gizmomap_highlight_find` > - `gizmo_find_intersected_3d` > - `gizmo_find_intersected_3d_intern` > > If `test_select` is not defined specifically, this seems to go over the selection buffer and checks with `3 * U.pixelsize` as well as `10 * U.pixelsize` around the mouse position if it finds the gizmo in that area. > So the "margin" is defined here, lowering the value to `1 * U.pixelsize` (and just provide one value) will give you a really tight selection/highlighting around your geometry. So the situation is not perfect, esp. the hover would really help here, but it is not totally straightforward since atm. all these individual points in the scale cage are not individual `wmGizmo`, the whole thing is one single gizmo. (so you could get a highlite, but only on the whole cage which is obviously not what we are after) All in all, this does not really sound like a bug to me, more like a request for improved behavior [which this bugtracker is not meant for]. However, I would like a second pair of eyes here if the module wants to keep this as TODO.

Thomas Mann commented

2021-05-26 14:33:50 +02:00

Thank you for looking into this in detail!

Regarding the question, if this is a bug, it probably depends ones subjective perspective: For me as a user, if I see a number of clearly seperate selection handles, I expect that precisely dragging one of them just works (I.e. picks the handle below the mouse pointer). In case of the scale cage, scaling on more than one axis will result in unwanted incorrect manipulations that are difficult not notice.

For me this is so annoying that I try to avoid this tool, that is designed for precisely this use case.

Thank you for looking into this in detail! Regarding the question, if this is a bug, it probably depends ones subjective perspective: For me as a user, if I see a number of clearly seperate selection handles, I expect that precisely dragging one of them just works (I.e. picks the handle below the mouse pointer). In case of the scale cage, scaling on more than one axis will result in unwanted incorrect manipulations that are difficult not notice. For me this is so annoying that I try to avoid this tool, that is designed for precisely this use case.

Pratik Borhade commented

2021-08-26 07:21:50 +02:00

Added subscribers: @Vyach, @PratikPB2123

Pratik Borhade commented

2021-09-20 07:30:24 +02:00

Added subscriber: @michalpe

Michał Pęczak commented

2021-09-20 09:37:04 +02:00

Hello, I want to say that it IS a bug, and it does need to be fixed. In certain views you literally point your mouse cursor right at the handle and, even though you've got a lot of free space on screen, even though you're zoomed in, so the cage covers nearly all your viewport, even then Blender may pick the wrong handle. It's not just the issue with small objects on screen. The handle sorter is just broken. I hope that the model I attached in the link below will prove it to you, devs.

See my case:
https://developer.blender.org/T91517

Hello, I want to say that it IS a bug, and it does need to be fixed. In certain views you literally point your mouse cursor right at the handle and, even though you've got a lot of free space on screen, even though you're zoomed in, so the cage covers nearly all your viewport, even then Blender may pick the wrong handle. It's not just the issue with small objects on screen. The handle sorter is just broken. I hope that the model I attached in the link below will prove it to you, devs. See my case: https://developer.blender.org/T91517

Bulat commented

2022-01-12 15:31:54 +01:00

Added subscriber: @BulatKR

Bulat commented

2022-01-12 15:31:54 +01:00

Scale Cage works mostly stably only with standard primitives - cube and plane etc, but when trying to scale a modeled object, the tool quite often stops working normally.

Vyacheslav Kobozev commented

2022-01-29 22:30:10 +01:00

Poke.
It is still not fixed.

Not only with small objects but with big objects too.
Why this poorly tested tool was implemented in master, but well working vertex paint is not?

Poke. It is still not fixed. Not only with small objects but with big objects too. Why this poorly tested tool was implemented in master, but well working vertex paint is not?

Vyacheslav Kobozev commented

2022-01-29 22:35:42 +01:00

Please delete this tool, It do not work in most cases.
It should not to be present in master in that state as it now have
2022-01-30_00-32-30.mp4

Please delete this tool, It do not work in most cases. It should not to be present in master in that state as it now have [2022-01-30_00-32-30.mp4](https://archive.blender.org/developer/F12834186/2022-01-30_00-32-30.mp4)

Michał Pęczak commented

2022-01-30 10:29:59 +01:00

In #88579#1297621, @Vyach wrote:
Please delete this tool, It do not work in most cases.
It should not to be present in master in that state as it now have
2022-01-30_00-32-30.mp4

No, don't delete it. FIX it. This tool is crucial for architecture modelling, but it should work properly. Please, prioritize fixing scale cage.

> In #88579#1297621, @Vyach wrote: > Please delete this tool, It do not work in most cases. > It should not to be present in master in that state as it now have > [2022-01-30_00-32-30.mp4](https://archive.blender.org/developer/F12834186/2022-01-30_00-32-30.mp4) No, don't delete it. FIX it. This tool is crucial for architecture modelling, but it should work properly. Please, prioritize fixing scale cage.

Vyacheslav Kobozev commented

2022-01-30 12:32:59 +01:00

In #88579#1297759, @michalpe wrote:
No, don't delete it. FIX it. This tool is crucial for architecture modelling, but it should work properly. Please, prioritize fixing scale cage.

Yes, fix is more desirable, but as far as it do not work, it can`t be in the master

> In #88579#1297759, @michalpe wrote: > No, don't delete it. FIX it. This tool is crucial for architecture modelling, but it should work properly. Please, prioritize fixing scale cage. Yes, fix is more desirable, but as far as it do not work, it can`t be in the master

Bulat commented

2022-01-31 10:23:50 +01:00

The topic is called "Selecting center handles of Scale Change does not work for small objects", but I would say that this tool simply does not work under any circumstances with more complex objects than a cube.

Philipp Oeser changed title from ~~Selecting center handles of Scale Cage does not work for small objects~~ to Scale Cage doesn't work well for small/large objects

2022-01-31 10:42:13 +01:00

Michał Pęczak commented

2022-02-01 00:06:00 +01:00

In #88579#1298100, @BulatKR wrote:
The topic is called "Selecting center handles of Scale Change does not work for small objects", but I would say that this tool simply does not work under any circumstances with more complex objects than a cube.

Even a cube can be problematic, depending on the view angle.
I made a similar topic, but someone made a wrong decision of merging the two topics, while my case presents a different side of this problem - scale cage would pick wrong handle under certain view angles in 3D, regardless of object size:
https://developer.blender.org/T91517

> In #88579#1298100, @BulatKR wrote: > The topic is called "Selecting center handles of Scale Change does not work for small objects", but I would say that this tool simply does not work under any circumstances with more complex objects than a cube. Even a cube can be problematic, depending on the view angle. I made a similar topic, but someone made a wrong decision of merging the two topics, while my case presents a different side of this problem - scale cage would pick wrong handle under certain view angles in 3D, regardless of object size: https://developer.blender.org/T91517

Vyacheslav Kobozev commented

2022-02-01 00:58:23 +01:00

@michalpe, let`s wait a patch. If there was the same reason, your case will be fixed too,
Otherwise ask to reopen and de-merge under your report.

@michalpe, let`s wait a patch. If there was the same reason, your case will be fixed too, Otherwise ask to reopen and de-merge under your report.

lictex_ commented

2022-02-01 08:32:52 +01:00

Added subscriber: @lictex_1

lictex_ commented

2022-02-01 08:32:52 +01:00

size of the selection area is in world space instead of screen space, this is the real cause of this issue imo
handles on a small object will overlap together, and on a large object it will become so small for clicking
#91517 should be same, hitboxes in that file might look like this

try dragging on the non-overlapping area, or simply scale up the entire object by 10x, it should be able to pick up the correct axis

this tool simply does not work under any circumstances with more complex objects than a cube.

afaik this tool works on object level and the mesh data underlying shouldn't matter a lot. maybe a .blend file helps showing the problem

size of the selection area is in world space instead of screen space, this is the real cause of this issue imo handles on a small object will overlap together, and on a large object it will become so small for clicking #91517 should be same, hitboxes in that file might look like this ![image.png](https://archive.blender.org/developer/F12838774/image.png) try dragging on the non-overlapping area, or simply scale up the entire object by 10x, it should be able to pick up the correct axis > this tool simply does not work under any circumstances with more complex objects than a cube. afaik this tool works on object level and the mesh data underlying shouldn't matter a lot. maybe a .blend file helps showing the problem

Michał Pęczak commented

2022-02-01 18:52:30 +01:00

I dragged over non-overlapping area, with a simple box. My case can't possibly be simpler, and it still doesn't work properly. If you navigate to my thread:
https://developer.blender.org/T91517
you'll see an attached .blend.

I dragged over non-overlapping area, with a simple box. My case can't possibly be simpler, and it still doesn't work properly. If you navigate to my thread: https://developer.blender.org/T91517 you'll see an attached .blend.

blender-admin commented

2022-02-04 05:31:06 +01:00

This issue was referenced by f7a6e8db04

This issue was referenced by f7a6e8db04bc3f61e4e7ef6e6b07eaef9ce15066

Campbell Barton commented

2022-02-04 05:38:18 +01:00

Changed status from 'Needs Developer To Reproduce' to: 'Resolved'

Campbell Barton closed this issue

2022-02-04 05:38:18 +01:00

Campbell Barton self-assigned this 2022-02-04 05:38:18 +01:00

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Scale Cage doesn't work well for small/large objects #88579