Select Box Tool: Selecting more than 2500 objects when 2500 is selected changes the tool's behavior, deselecting everything #102487

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Sidney Moraes Jr · 2022-11-14T00:30:41+01:00

Sidney Moraes Jr commented

2022-11-14 00:30:41 +01:00

System Information
Operating system: Windows 10
Graphics card: GTX 970

Blender Version
Broken: 3.3.1

Short description of error
Select Box Tool in object mode:

Works as intended when the previous object selection is lower or equal to 2500 AND you are trying to select <=2500 objects;
If the selection is 2500 or higher AND you try to select more or equal to 2501 objects, the tool will deselect all the objects;
If the selection is 2499 AND you try to select 2501 (or more) AND being one of those 2 more objects an active object, the tool will deselect all the objects as well.
It is probably related to https://developer.blender.org/T102485

Exact steps for others to reproduce the error
Selection_+2.5K_objects_weird_behavior.blend
Right behavior:

Select the 2499 objects from the file;
With them selected, select them again plus the 2,5k and +1 object: it will work as intended;

Wrong behavior:

Select the 2500 objects from the file;
With them selected, select them again plus the +1 object: it will deselect (wrong behavior);

Other Wrong behavior:

Change the active object to the 2,5k object at the top;
Select the 2499 objects from the file, leaving the 2,5k out of the selection, but "active";
With them selected, select them again plus the 2,5k and +1 object: it will deselect (wrong behavior);

Selection_2,5k_objects.webm

**System Information** Operating system: Windows 10 Graphics card: GTX 970 **Blender Version** Broken: 3.3.1 **Short description of error** Select Box Tool in object mode: - Works as intended when the previous object selection is lower or equal to 2500 AND you are trying to select <=2500 objects; - If the selection is 2500 or higher AND you try to select more or equal to 2501 objects, the tool will deselect all the objects; - If the selection is 2499 AND you try to select 2501 (or more) AND being one of those 2 more objects an active object, the tool will deselect all the objects as well. It is probably related to https://developer.blender.org/T102485 **Exact steps for others to reproduce the error** [Selection_+2.5K_objects_weird_behavior.blend](https://archive.blender.org/developer/F13905977/Selection__2.5K_objects_weird_behavior.blend) Right behavior: - Select the 2499 objects from the file; - With them selected, select them again plus the 2,5k and +1 object: it will work as intended; Wrong behavior: - Select the 2500 objects from the file; - With them selected, select them again plus the +1 object: it will **deselect** (wrong behavior); Other Wrong behavior: - Change the active object to the 2,5k object at the top; - Select the 2499 objects from the file, leaving the 2,5k out of the selection, but "active"; - With them selected, select them again plus the 2,5k and +1 object: it will **deselect** (wrong behavior); [Selection_2,5k_objects.webm](https://archive.blender.org/developer/F13906076/Selection_2_5k_objects.webm)

Sidney Moraes Jr commented

2022-11-14 00:30:41 +01:00

Added subscriber: @SidneyMoraesJr

Jesse Yurkovich commented

2022-11-14 00:53:05 +01:00

Added subscriber: @deadpin

Jesse Yurkovich commented

2022-11-14 00:53:05 +01:00

Yes, this is rooted in the same issue as the other bug. I'll duplicate this bug with your other one, note the below information, and ask the devs what they'd want to do about it -- it's been this way for many years now including back to the Blender 2.7x series. It was introduced in 50e9868abe

The 2500 number is hardcoded right now. The particular usage of this value during selection is roughly 2 * MAXPICKELEMS as seen in:
https://developer.blender.org/diffusion/B/browse/master/source/blender/editors/space_view3d/view3d_select.cc$3740

/**
 * The default value for the maximum number of elements that can be selected at once
 * using view-port selection.
 *
 * \note in many cases this defines the size of fixed-size stack buffers,
 * so take care increasing this value.
 */
#define MAXPICKELEMS 2500

Yes, this is rooted in the same issue as the other bug. I'll duplicate this bug with your other one, note the below information, and ask the devs what they'd want to do about it -- it's been this way for many years now including back to the Blender 2.7x series. It was introduced in 50e9868abe The 2500 number is hardcoded right now. The particular usage of this value during selection is roughly 2 * MAXPICKELEMS as seen in: `https://developer.blender.org/diffusion/B/browse/master/source/blender/editors/space_view3d/view3d_select.cc$3740` ``` /** * The default value for the maximum number of elements that can be selected at once * using view-port selection. * * \note in many cases this defines the size of fixed-size stack buffers, * so take care increasing this value. */ #define MAXPICKELEMS 2500 ```

Jesse Yurkovich commented

2022-11-14 00:54:50 +01:00

Closed as duplicate of blender/documentation#102485

Jesse Yurkovich closed this issue

2022-11-14 00:54:50 +01:00

Sidney Moraes Jr commented

2022-11-14 01:47:15 +01:00

Thanks, Jesse. By the way, sorry, I edited the other task text and forgot to send it. When I sent the link, I saw you had already updated it.