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  RAW Format loading  (Read 1029 times)
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Offline Mojomonkey

Senior Member

ooh ooh eee eeee

« Posted 2003-05-12 16:00:07 »

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:

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:

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

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

Any pointers?


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Offline Abuse

JGO Coder

Medals: 11

falling into the abyss of reality

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

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 16:43:23 »

Use DataInputStream.readUnsignedByte() that should help.

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Offline Mojomonkey

Senior Member

ooh ooh eee eeee

« Reply #3 - Posted 2003-05-12 16:51:26 »

Thank you both.

That was the problem.

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