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  RAW Format loading  (Read 1050 times)
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Offline Mojomonkey

Senior Member




ooh ooh eee eeee


« Posted 2003-05-12 14:00:07 »

Sorry guys, I did not know where else to post this question. There should be a General Programming group.

Anyways, maybe someone here can help me.

Working on some basic terrain, I desire to use a greyscale RAW image to use as the heightmap. However, I'm having issues loading the data. I have a piece of C code that loads RAW in the following way:

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char* data;
fread(data, 1, size * size, file);


where size is the dimensions of the RAW (i.e. 128x128). I attempted to do the same in Java as follows:

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Byte[] heightData = new Byte[size * size];
fis = new FileInputStream(filename);
BufferedInputStream bis = new BufferedInputStream(fis);
bis.read(heightData);


This reads the data, but the values are way off, about half are negative.

Any pointers?

Thanks.

Don't send a man to do a monkey's work.
Offline Abuse

JGO Knight


Medals: 12


falling into the abyss of reality


« Reply #1 - Posted 2003-05-12 14:16:09 »

I assume you meant byte not Byte.

but anyway....

bytes are signed in java -128 to +127

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Offline zparticle

Senior Member




Thick As A Brick


« Reply #2 - Posted 2003-05-12 14:43:23 »

Use DataInputStream.readUnsignedByte() that should help.

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Offline Mojomonkey

Senior Member




ooh ooh eee eeee


« Reply #3 - Posted 2003-05-12 14:51:26 »

Thank you both.

That was the problem.

Don't send a man to do a monkey's work.
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