[Gdal-dev] Complex Data Types

[Matt Hanson]

Ok, so if I defined my own complex structure
 
struct CInt16 {
   int16 real;
   int16 imag;
}
 
and declare a pointer for a 100x100 section:
CInt16 *cbuff = new CInt16[100*100]
 
I *think* I should be able to pass this to RasterIO using the GDT_CInt16 type, correct?
 
-matt
 

________________________________

From: Frank Warmerdam [mailto:warmerdam at pobox.com]
Sent: Tue 8/22/2006 3:24 PM
To: Matt Hanson
Cc: gdal-dev at lists.maptools.org
Subject: Re: [Gdal-dev] Complex Data Types



Matt Hanson wrote:
> I'm a little confused with regard to GDAL's handling of complex data
> types.  As there is no built in complex types for C++ what is RasterIO
> expecting as a buffer type when using the GDT_C* data types?   Would it
> simply be a pointer of twice the normal length?

Matt,

Essentially the complex data types are passed around as pairs of the
basic data type.  So an array of GDT_CInt16 would be an array of GInt16's
but with two values (real followed by imaginary) for each value.

So, the answer to your question is "yes".

Best regards,
--
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