[vtkusers] Huge framedrops on Android when opening textured OBJs

[Bill Lorensen]

How large are your textures and are they powers of 2. I've seen big
performance hits with large textures (1024x1024) in a webgl app.
On May 25, 2016 11:19 AM, "András Lehotay-Kéry" <lkandris at gmail.com> wrote:

> Hey folks!
> I mainly use VTK 7.0.0  for model display purposes on Android platform. I
> gave a try got the quite recently introduced vtkOBJImporter class to test
> the viewer behaviour for OBJ models with multiple textures and bumped into
> the following issues:
>
> Scenario 1:
> If i use vtkOBJImporter for models with any number of textures, i get
> ENORMOUS framedrops
> Scenario 2:
>  If i use vtkOBJReader for models with a single texture, i get the same
> effect as above
> Scenario 3:
> If i use vtkOBJReader for the same models but without textures, i have no
> issues, the viewer is up to speed.
>
> I recorded two short videos for demostration:
> Scenario 2:
> https://goo.gl/93ag9e
> Scenario 3:
> https://goo.gl/cn0blJ
> Test model:
> https://sketchfab.com/models/a6f343cc661644319f88f1bdd20fe6de
>
> Mind you, the test model is quite large, but i get the same effect on
> models weigh less than 1MB.
>
> Build setup:
> Debian 8.3
> Android NDK r10e
> toolchain GCC 4.9
> -O3 optimization
> OpenGL ES 2.0 / 3.0 linkage (tried both, makes no difference here)
>
> Test devices:
> LG G4
> Nexus 9
> Galaxy S5
>
> What could cause this effect? Different rendering mechanism for textured
> models?
> Thanks in advance!
>
>
>
>
> ----------------------------
>
> [image: SmartMobileVision] <http://www.smartmobilevision.com/>
>
>
> *András Lehotay-Kéry*Software Developer (Mobile / Computer Vision)
> lka at smartmobilevision.com
>
> SmartMobileVision
> Szent Gellért tér 3, 1114 Budapest, Hungary
> www.smartmobilevision.com
>
> [image: Google +]  <https://plus.google.com/+Andr%C3%A1sLehotayK%C3%A9ry> [image:
> LinkedIn]  <https://www.linkedin.com/in/andras-lehotay-kery-8abb899b>
>
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