From: Praveen Bhaniramka (praveenb++at++sgi.com)
Date: 07/31/2005 21:44:59
Hi Haiquan,
Regarding your first issue, you should check the libtiff DLL on your system.
I had seen a similar problem on my PC when the libtiff DLL did not have
execute permissions on them... changing the permissions fixed the issue.
Another thing to check would be to make sure that the other DLLs required by
libtiff are present on the system, namely libjpeg and libz.
The second issue is probably due to the LUT that you are using. Try removing
the following line from your XML file and see if the app works.
<filename>DEFAULTLUT.lut</filename>
If no filename is provided, the XML loader will create a lookup table with a
default linear ramp of size 256. You seem to be using a LUT size of 65535.
What graphics hardware are you running this on? Volumizer will not support
such large LUTs unless the graphics hardware has the require OpenGL
extensions (see the release notes -> Platform Dependencies section).
Thanks.
Praveen
----- Original Message -----
From: "Haiquan Yang" <yang.haiquan++at++gmail.com>
To: <info-performer++at++sgi.com>
Sent: Sunday, July 31, 2005 12:00 PM
Subject: [info-performer] volumizer beginner
> Hello, everyone,
> I am a newer for Volumizer. I downloaded Volumizer 2.8 and intall
> it.I tried C:\Program Files\Silicon Graphics\OpenGL
> Volumizer\src\apps\simple\xml\..., I met some problems.
> 1) When I open a .tif file, for example simple.vz, I met a runtime
> error about libtiff as following.
>
> Assertion failed!
>
> ************************************************************************
> File ../../tiff-3.7.2-src/libtiff/tif_luv.c
> Expression: scheme=COMPRESSION_SGILOG24 || scheme == COMPRESSION_SGILOG
>
> ************************************************************************
>
> ************************************************************************
> 2)I also tried the binary file. It is well for the sample binary.vz,
> it is ubyte format. But when I tried a ushort file, I got the
> following warning,and the rendering is not right.
>
> Volumizer Warning:
> vzLUTManager::bindLUT(): OpenGL error 1285
>
> I used the following vz file
> <?xml version="1.0"?>
> <!DOCTYPE vzShapeSet SYSTEM "vzxml.dtd">
> <vzShapeSet>
> <vzShape id="shape1">
> <vzAppearance>
> <vzShader>
> <vzTMLUTShader/>
> </vzShader>
> <vzParameterVolumeTexture name="volume">
> <filename>Pana_2_30m.rec</filename>
> <module name="bin">
> <userString>0 300 576 576 luminance ushort</userString>
> </module>
> </vzParameterVolumeTexture>
> <vzParameterLookupTable name="lookup_table">
> <filename>DEFAULTLUT.lut</filename>
> </vzParameterLookupTable>
> </vzAppearance>
> </vzShape>
> </vzShapeSet>
>
>
> And the DEFAULYLUT.lut is defined as
> version_1.0
> 65536
> LUMINANCE
> Interpolation_mode: 1
> 2
> 0 0
> 65535 1
> 32768 32767
> Interpolation_mode: 1
> 2
> 0 0
> 65535 1
> 32768 32767
> Interpolation_mode: 1
> 2
> 0 0
> 65535 1
> 32768 32767
> Interpolation_mode: 1
> 2
> 0 0
> 65535 1
> 32768 32767
> Interpolation_mode: 1
> 2
> 0 0
> 65535 1
> 32768 32767
>
> Please help me, thank you.
>
> Haiquan
>
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