Cannot select all vertices in edit mode on huge objects #90203

New Issue

Sebastien Larocque · 2021-07-26T20:08:00+02:00

2021-07-26 20:08:00 +02:00

System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: GeForce GTX 1070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 462.59

Blender Version
Broken: version: 2.93.1, branch: master, commit date: 2021-06-22 05:57, hash: 1b8d33b18c
Worked: Never

Short description of error
Cannot select all vertices in edit mode on huge objects

Exact steps for others to reproduce the error

Open the attached scene to test.
Select the “Icosphere_Huge” object.
Go to edit mode.
Use the “Circle Select” (C shortcut) to select the vertices.
Select the vertices on the object.
As a result, not all vertices will be selected.
Moving the view (pan, rotate or zoom) allows to select other vertices.

The scene also contains an object “Icosphere_Small”. This sphere is 200 units in diameters and has no problem with the selection. The object Icosphere_Huge is 300000 units and has problems with the vertex selection.

I cannot pinpoint a precise cause to the problem right now. However, it seems to occur only with very large objects or when the view is set to a high clipping end value (to be able to visualize large objects).

You can look at the video below where I used the Circle Select to select the vertices. I had to change the view many times to be able to select the skipped vertices. This scenario happens every time when I try to select vertices like this.

Cannot_select _all_vertices_on_huge_objects.blend

Cannot_select _all_vertices_on_huge_objects.mp4

**System Information** Operating system: Windows-10-10.0.19041-SP0 64 Bits Graphics card: GeForce GTX 1070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 462.59 **Blender Version** Broken: version: 2.93.1, branch: master, commit date: 2021-06-22 05:57, hash: `1b8d33b18c` Worked: Never **Short description of error** Cannot select all vertices in edit mode on huge objects **Exact steps for others to reproduce the error** * Open the attached scene to test. * Select the “Icosphere_Huge” object. * Go to edit mode. * Use the “Circle Select” (C shortcut) to select the vertices. * Select the vertices on the object. * As a result, not all vertices will be selected. * Moving the view (pan, rotate or zoom) allows to select other vertices. The scene also contains an object “Icosphere_Small”. This sphere is 200 units in diameters and has no problem with the selection. The object Icosphere_Huge is 300000 units and has problems with the vertex selection. I cannot pinpoint a precise cause to the problem right now. However, it seems to occur only with very large objects or when the view is set to a high clipping end value (to be able to visualize large objects). You can look at the video below where I used the Circle Select to select the vertices. I had to change the view many times to be able to select the skipped vertices. This scenario happens every time when I try to select vertices like this. [Cannot_select _all_vertices_on_huge_objects.blend](https://archive.blender.org/developer/F10239045/Cannot_select__all_vertices_on_huge_objects.blend) [Cannot_select _all_vertices_on_huge_objects.mp4](https://archive.blender.org/developer/F10239055/Cannot_select__all_vertices_on_huge_objects.mp4)

Sebastien Larocque commented

2021-07-26 20:08:00 +02:00

Added subscriber: @SebBlender

Sebastien Larocque commented

2021-07-26 21:19:24 +02:00

Note: I've just reported another bug related to the view and the vertex selection (#90207). I believe there is a connection between the two bugs. This is why I’m mentioning it here. In this new test, I also had problems selecting vertices, but in orthographic view and with the small sphere.

Pratik Borhade commented

2021-07-27 03:30:24 +02:00

Added subscriber: @PratikPB2123

Pratik Borhade commented

2021-07-27 03:30:24 +02:00

Changed status from 'Needs Triage' to: 'Needs User Info'

Pratik Borhade commented

2021-07-27 03:30:24 +02:00

I can confirm with the provided file. But can not reproduce it from scratch (with default icosphere).
Could you please mention the steps to reproduce the mesh?

I think increasing the "clip start" value will fix the issue.

I can confirm with the provided file. But can not reproduce it from scratch (with default icosphere). Could you please mention the steps to reproduce the mesh? I think increasing the "clip start" value will fix the issue.

Pratik Borhade commented

2021-07-27 03:33:56 +02:00

Also I guess this is similar to: #86920.

Sebastien Larocque commented

2021-07-27 14:40:01 +02:00

Hello @PratikPB2123.

Here’s some extra information to answer your question about reproducing the mesh and also creating the problem. Here’s a scenario that creates the problem on my computer.

Open a new empty Blender window.
Press “N” to show the sidebar and go to the “View” panel.
Change the clip start to “0.5” and the clip end to “900000”
Note that the clip end will be set to “10000”. You will have to enter again “900000”. Is that a bug?
Shift + A and select Mesh | Ico Sphere.
In the “Add Ico Sphere” panel at the bottom left, change the parameters for “Subdivisions: 5” and “Radius: 300000”.
Do View | Frame Selected or the “.” on the numpad to set the focus on the sphere at the default focus distance.
From there, you can enter edit mode and start playing with Circle Select and play with the view (zoom, rotate, pan).

I hope that helps. This is how I create my test project.

Hello @PratikPB2123. Here’s some extra information to answer your question about reproducing the mesh and also creating the problem. Here’s a scenario that creates the problem on my computer. * Open a new empty Blender window. * Press “N” to show the sidebar and go to the “View” panel. * Change the clip start to “0.5” and the clip end to “900000” * Note that the clip end will be set to “10000”. You will have to enter again “900000”. Is that a bug? * Shift + A and select Mesh | Ico Sphere. * In the “Add Ico Sphere” panel at the bottom left, change the parameters for “Subdivisions: 5” and “Radius: 300000”. * Do View | Frame Selected or the “.” on the numpad to set the focus on the sphere at the default focus distance. * From there, you can enter edit mode and start playing with Circle Select and play with the view (zoom, rotate, pan). I hope that helps. This is how I create my test project.

Germano Cavalcante commented

2021-07-27 15:32:27 +02:00

Added subscriber: @mano-wii

Germano Cavalcante commented

2021-07-27 15:32:27 +02:00

Changed status from 'Needs User Info' to: 'Archived'

Germano Cavalcante closed this issue

2021-07-27 15:32:27 +02:00

Germano Cavalcante commented

2021-07-27 15:32:27 +02:00

The selection code draws an indices map that resembles the image seen in the 3D view.
Just like in 3D view a large range between Clip Start and Clip End can cause problem hiding some vertices, the selection map also hides some vertices.
Note in the video that the unselected vertices are the unseen ones.

This is a limitation in rendering engines (seen in both OpenGL and DirectX and Vulkan). There is no trivial solution.
Try to avoid these extreme clip values.

The selection code draws an indices map that resembles the image seen in the 3D view. Just like in 3D view a large range between Clip Start and Clip End can cause problem hiding some vertices, the selection map also hides some vertices. Note in the video that the unselected vertices are the unseen ones. This is a limitation in rendering engines (seen in both OpenGL and DirectX and Vulkan). There is no trivial solution. Try to avoid these extreme clip values.

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Cannot select all vertices in edit mode on huge objects #90203