Re: [Therion] compiling therion under Ubuntu AMD64

[Stacho Mudrak]

I am almost sure this is not the case on Linux system - it was (still 
is???) a limitation of Win32 OpenGL. But loch does this interpolation 
internally - it scales every image to a square 2^n pixel size, before it 
use it as a texture.

I do not know where the problem on Linux is - it has probably something 
to do with Linux OpenGL architecture - on both other platforms (Win32 
and Mac OS X), texture mapping works as expected. And it works on Linux 
also - at home I have NVidia OpenGL driver (with NVidia OpenGL shared 
library) and there it works also.

OK, I will try to install some plain Linux without hardware acceleration 
and debug it.

Regards, S.

Philip Schuchardt wrote:
> I think I explained it wrong???
> 
> Your image dimesion needs to be a factor of 2.
> 
> Examples:
> overlay.png  has a dimesion of 128x128 or
> overlay2.png has a dimesion of 512x256
> 
> Is that what your doing?
> 
> You can easily re-scale the images using gimp.  
> 
> Philip Schuchardt
> 
> On Sunday 15 April 2007 4:55 pm, Wolfgang Zillig wrote:
>> it does not change much: it is still gray but in some cases strange
>> triangles occur.
>>
>> I've tested 0.5 2 4 and 8 as factors. But with 8x the limits of my
>> computer seem to be almost reached.
>>
>> Any other ideas?
>> Greetings
>> Wolfgang
>>
>> PS: I'm using 0.5.0 v of therion. Has something changed in the
>> development version?
>>
>> Philip Schuchardt wrote:
>>> You have interpolate the pixel graphics.
>>>
>>> On Sunday 15 April 2007 4:13 pm, Wolfgang Zillig wrote:
>>>> Hi Philip,
>>>>
>>>> what do I have to do? Interpolating the pixel graphic or changing
>>>> something in my .th file?
>>>>
>>>> Greetings
>>>> Wolfgang
>>>>
>>>> Philip Schuchardt wrote:
>>>>> Ahh.  The linux version of loch has a bug preventing rendering correct
>>>>> texture mapping.  I think it has to do with openGL problem factor of 2
>>>>> texture mapping.  The textures dimensions need to be a factor of 2. 
>>>>> I'm just guessing that this is the problem.  Try to re-scale your
>>>>> overlay to be a factor of 2(1, 2, 8, 16, 32, 64, 128 ... etc).  Tell us
>>>>> if it works.
>>>>>
>>>>> Philip Schuchardt
>>>>>
>>>>> On Sunday 15 April 2007 3:30 pm, Wolfgang Zillig wrote:
>>>>>> I had to adapt the path to vtk and remove -lvtkjpeg -lvtkpng -lktkzlib
>>>>>> from the makefile. (the terminal was not configured to scroll through
>>>>>> so many lines and therefore I did not see the uppermost error) . There
>>>>>> were a lot of warnings like:  "warning: dereferencing type-punned
>>>>>> pointer will break strict-aliasing rules" during compillation. If
>>>>>> needed I can send you the full screen output.
>>>>>>
>>>>>> I can compile my project but the surface graphic is missing! Only a
>>>>>> gray surface is displayed. Is this due to the skipped parameter
>>>>>> -lvtkjpeg? Do I need to compile vtk from sources? I've installed
>>>>>> libvtk5 and libvtk5-dev (5.0.2-4ubuntu1).
>>>>>>
>>>>>> Thanks for any help
>>>>>> Wolfgang
>>>>>>
>>>>>> Stacho Mudrak wrote:
>>>>>>> I am not sure, but probably loch compilation does not work by
>>>>>>> default. List of libraries needed for loch is at loch/README.
>>>>>>>
>>>>>>> Regards, S.
>>>>>>>
>>>>>>> Wolfgang Zillig wrote:
>>>>>>>> Hi,
>>>>>>>>
>>>>>>>> is there somewhere a list with all the libraries that are needed to
>>>>>>>> compile therion under linux? Or a kind of manual?
>>>>>>>>
>>>>>>>> I just tried "make" but I'm getting errors, so I suppose that I miss
>>>>>>>> some libraries.
>>>>>>>>
>>>>>>>> Greetings
>>>>>>>> Wolfgang
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