Error with subdivide #70523

New Issue

Valentin · 2019-10-04T16:19:20+02:00

Valentin commented

2019-10-04 16:19:20 +02:00

System Information
Operating system:
Graphics card: Nvidia GTX 1050 ti

Blender Version
Broken: 2.80 and 2.81

Short description of error
After using the subdivide modifier on the model, the blender hangs for 2 minutes + -
With quality 3 or higher
This hang occurs in this model because of the dense mesh around - 192 vertexes, with 32 vertexes everything is fine, it was also checked in 2.7 with 192 vertexes it does not freeze
После использования модификатора сабдивайд на модели, блендер зависает на минуты 2+-
При качестве 3 или выше
Это подвисание происходит у этой модели из за плотной сетки вокруг - 192 вертекса, при 32-х вертексов все нормально, так же проверено было в 2.7 при 192 вертексов не зависает

Exact steps for others to reproduce the error
Select a model and press ctrl + 1
Выбрать модель и нажать сочетание клавиш ctrl + 1
Test.blend

**System Information** Operating system: Graphics card: Nvidia GTX 1050 ti **Blender Version** Broken: 2.80 and 2.81 **Short description of error** After using the subdivide modifier on the model, the blender hangs for 2 minutes + - With quality 3 or higher This hang occurs in this model because of the dense mesh around - 192 vertexes, with 32 vertexes everything is fine, it was also checked in 2.7 with 192 vertexes it does not freeze После использования модификатора сабдивайд на модели, блендер зависает на минуты 2+- При качестве 3 или выше Это подвисание происходит у этой модели из за плотной сетки вокруг - 192 вертекса, при 32-х вертексов все нормально, так же проверено было в 2.7 при 192 вертексов не зависает **Exact steps for others to reproduce the error** Select a model and press ctrl + 1 Выбрать модель и нажать сочетание клавиш ctrl + 1 [Test.blend](https://archive.blender.org/developer/F7789153/Test.blend)

Valentin commented

2019-10-04 16:19:20 +02:00

Added subscriber: @valya2255

Demeter Dzadik commented

2019-10-04 17:37:04 +02:00

Added subscriber: @Mets

Demeter Dzadik commented

2019-10-04 17:37:04 +02:00

Do you mean 192 thousand?

What is your CPU model?

Edit: I missed the test file. Indeed adding subsurf level 2 to that mesh of only 34k verts, seems to take about 1.5 minute. Strange, doing the same on a sphere with 300k verts only takes a couple of seconds.

Do you mean 192 thousand? What is your CPU model? Edit: I missed the test file. Indeed adding subsurf level 2 to that mesh of only 34k verts, seems to take about 1.5 minute. Strange, doing the same on a sphere with 300k verts only takes a couple of seconds.

Valentin commented

2019-10-04 17:39:40 +02:00

In #70523#789681, @Mets wrote:
Do you mean 192 thousand?

What is your CPU model?

No. 192 vertex in a circle at the 1st loop in the model. My CPU i5 4460

> In #70523#789681, @Mets wrote: > Do you mean 192 thousand? > > What is your CPU model? No. 192 vertex in a circle at the 1st loop in the model. My CPU i5 4460

Demeter Dzadik commented

2019-10-04 17:47:47 +02:00

It seems to be caused by the n-gons at the top and bottom. Not sure if this is a bug or a limitation.

Valentin commented

2019-10-04 17:50:53 +02:00

In #70523#789688, @Mets wrote:
It seems to be caused by the n-gons at the top and bottom. Not sure if this is a bug or a limitation.

Hm after triangulation the hovering went faster

> In #70523#789688, @Mets wrote: > It seems to be caused by the n-gons at the top and bottom. Not sure if this is a bug or a limitation. Hm after triangulation the hovering went faster

Germano Cavalcante commented

2019-10-07 16:44:13 +02:00

Added subscribers: @Sergey, @mano-wii

Sergey Sharybin was assigned by Germano Cavalcante

2019-10-07 16:44:13 +02:00

Germano Cavalcante commented

2019-10-07 16:44:13 +02:00

I can confirm.
In blender2.79 it was almost instantaneous.
The major cause of slowness is the openSubdiv_createEvaluatorInternal.
@Sergey, is this a known regression?

I can confirm. In blender2.79 it was almost instantaneous. The major cause of slowness is the `openSubdiv_createEvaluatorInternal`. @Sergey, is this a known regression?

Brecht Van Lommel commented

2019-10-07 16:59:31 +02:00

Added subscriber: @brecht