Re: [Chromium-users] Volume render, binary swap and mail on 2005-03-28

[Mike H. <mho...@gr...>]

Hrmm.  I only have ATI hardware (9800s/X800s) to test on.  Things seem 
fine on my end.  I'm not sure what's going on here.  The mis-sync 
problem seems VERY odd...

-Mike

Qinghuai Gao wrote:

>Mike :
>
>  
>
>>Wow.  That's spectacularly wrong.  What graphics boards/drivers/OS/etc 
>>are you using?
>>    
>>
>
>NVidia 3400, NVIDIA driver Linux-x86-1.0-7676, Linux Redhat WS 3.0 update 4.
>
>Qinghuai
>
>  
>
>>-Mike
>>
>>Qinghuai Gao wrote:
>>
>>
>>    
>>
>>>Mike :
>>>
>>>
>>>
>>>
>>>      
>>>
>>>>Hrmm.  The compositing is working on my end (with an occasional odd tear 
>>>>I've never been able to track down).  Can you send a screen shot of what 
>>>>you are seeing.  I've never seen the images get out of sync, are you 
>>>>running with the supplied conf files?
>>>>  
>>>>
>>>>        
>>>>
>>>I was using the supplied conf file raptor_4.conf.  Several screen shots
>>>are attched.  Thanks,
>>>
>>>Qinghuai
>>>
>>>
>>>
>>>
>>>      
>>>
>>>>-Mike
>>>>
>>>>Qinghuai Gao wrote:
>>>>
>>>>
>>>>  
>>>>
>>>>
>>>>        
>>>>
>>>>>Mike :
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>    
>>>>>
>>>>>
>>>>>          
>>>>>
>>>>>>Take a look at the sourcecode to Raptor, a volume renderer designed to 
>>>>>>work with Chromium:
>>>>>>http://graphics.stanford.edu/raptor
>>>>>>
>>>>>>
>>>>>>      
>>>>>>
>>>>>>            
>>>>>>
>>>>>Thanks.  I downloaded it and tried on my cluster and found two problems:
>>>>>(1) The composition issue as I described in the previous mail.  (2)
>>>>>Event synchronization issue: when I rotate the volume some nodes seemed
>>>>>responce slower so as a result, the composed image seemed weird (each
>>>>>piece has its own direction.
>>>>>
>>>>>By thw way, I saw the date of the version on the download page is
>>>>>3/21/2005.  It will be approciated if you have a newer version for me to
>>>>>try.
>>>>>
>>>>>I am using Chromium 1.8 from Chromium download site.  Is the nightly
>>>>>built better?
>>>>>
>>>>>Qinghuai
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>    
>>>>>
>>>>>
>>>>>          
>>>>>
>>>>>>-Mike
>>>>>>
>>>>>>Qinghuai Gao wrote:
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>      
>>>>>>
>>>>>>
>>>>>>            
>>>>>>
>>>>>>>I saw a mail on 2005-03-28 discussing volume render and binary swap
>>>>>>>posted by Joong-Youn Lee:
>>>>>>>
>>>>>>>"I found why binaryswap SPU did not work at my volume render.
>>>>>>>It was because fragment shader was turned on and never turned off.
>>>>>>>Thus, glDrawPixels in the binaryswap SPU never worked.
>>>>>>>I fixed to turn off vertex and fragment shaders at end of every single
>>>>>>>frame, and the SPU now works correctly."
>>>>>>>
>>>>>>>I am working on a volume render code and saw the same problem: the final
>>>>>>>composition result is simply a copy of 4 quarters from the 4 nodes.  Can
>>>>>>>saw alpha blending on the render nodes.
>>>>>>>
>>>>>>>So my question to Lee is:
>>>>>>>	Did you use shader to do the volume rendering?
>>>>>>>
>>>>>>>In my case, I only use many planes to cut through the volume and no
>>>>>>>shader is used.  Wonder the solution above is still applicable to my case.
>>>>>>>
>>>>>>>Also, shader is new to me.  If I need to turn off the shader, please
>>>>>>>advice how to turn off the shader.  I tried to put :
>>>>>>>	
>>>>>>>  glDisable(GL_FRAGMENT_PROGRAM_ARB);
>>>>>>>  glDisable(GL_VERTEX_PROGRAM_ARB);
>>>>>>>
>>>>>>>at the end of each frame but nothing changed.
>>>>>>>
>>>>>>>Thanks,
>>>>>>>
>>>>>>>Qinghuai
>>>>>>>
>>>>>>>
>>>>>>>
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>>>>>>>  
>>>>>>>
>>>>>>>        
>>>>>>>
>>>>>>>              
>>>>>>>
>>>>>>
>>>>>>      
>>>>>>
>>>>>>            
>>>>>>
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>>>>>
>>>>>          
>>>>>
>>>>  
>>>>
>>>>
>>>>------------------------------------------------------------------------
>>>>
>>>>
>>>>------------------------------------------------------------------------
>>>>
>>>>
>>>>------------------------------------------------------------------------
>>>>
>>>>        
>>>>
>>    
>>
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