[vtkusers] Huge framedrops on Android when opening textured OBJs

[András Lehotay-Kéry]

Just a few at most. Will try it then.
Does VTK provide any dynamic texture desampling at post load? That way i
can isolate low-res texture usage to the mobile viewer and i still get to
keep my fancy 4k textures.


----------------------------

[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 18:01 Bill Lorensen <bill.lorensen at gmail.com> wrote:

> 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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>
>
> --
> Unpaid intern in BillsBasement at noware dot com
>
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