POV-Ray : Newsgroups : povray.programming : *.hdr fileformat : Re: *.hdr fileformat Server Time
1 Jun 2024 21:52:22 EDT (-0400)
  Re: *.hdr fileformat  
From: Christoph Hormann
Date: 15 Nov 2005 09:24:18
Message: <dlcr1t$pda$1@chho.imagico.de>
Roman Reiner wrote:
> Hmm. It's getting tricky. Reading works already for uncompressed HDRI's. But
> MegaPOV's output isn't uncompressed in most cases ;-) Could someone give me
> a hint about the RLE-encoding used by MegaPOV as there seem to be many
> variations of this compression method.

No, there is exactly one compression scheme used by MegaPOV for writing 
HDR files.  It can also read a different older compression though.

> The file you linked says
> 
>>i don't recommend writing your own routine to decode it -- use what's in color.c.
> 
> but as i'm limited to java this doesn't help me very much ;-)

The file format docs also say the algorithm is descibed in detail in 
Chapter II.8 of Graphics Gems II.  I doubt however this will be of much 
help if translating a few lines of C code into Java is impossible for you.

Christoph

-- 
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http://www.imagico.de/ (Last updated 31 Oct. 2005)
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