[vtkusers] Huge framedrops on Android when opening textured OBJs

[Bill Lorensen]

How many 4k textures? I had about 100. Had to drop them to 512 then speed
was good.


On Wed, May 25, 2016 at 11:43 AM, András Lehotay-Kéry <lkandris at gmail.com>
wrote:

> Although mine is a native app, not webgl based, should be faster i think.
>
> On Wed, 25 May 2016 at 17:39 András Lehotay-Kéry <lkandris at gmail.com>
> wrote:
>
>> Well, mines can go up to 4096 x 4096. In fact the demo model has a
>> texture with just this size.
>> Allright, so if i split up my huge textures and generate multiple UV maps
>> from them of 512x512 size would it make any difference?
>>
>>
>>
>> ----------------------------
>>
>> [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>
>>
>> On Wed, 25 May 2016 at 17:35 Bill Lorensen <bill.lorensen at gmail.com>
>> wrote:
>>
>>> 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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-- 
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