OpenAL position data type

[aNt]

hello all...

i is just playing around with the OpenAL cool stuff. I have got it playing audio and stuff. Just wondering how i set the position of the sound?

i take it the call should take 3 floats but i cant see a call that will let me do that. can anyone help me out?

rock and roll....

[princec]

al.source3f(source, property, x, y, z);

where property is AL.POSITION

Cas

[aNt]

yep i got it working .

just wondered how i send stuff to:

al.sourcefv(int, int, int);

shouldnt it be:

al.sourcefv(int, int, float[]);

? if not how to i send an array of floats to 'sourcefv' ?

top tops anyways. - just wondered.

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[Matzon]

shouldnt it be:
al.sourcefv(int, int, float[]);

Not if you want LWJGL to be FAST!

We use ByteBuffers to transfer between Java and the Native side. Pack you floats into a ByteBuffer, and pass the position of those floats long.

Check
http://java-game-lib.sourceforge.net/documents/openal_c-to-java.html
for more info

[cfmdobbie]

That last parameter would be the address of a FloatBuffer.  Do something like:

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// Do this bit once - it's computationally expensive FloatBuffer fb = ByteBuffer.allocateDirect(3 * 4).order(ByteOrder.nativeOrder()).asFloatBuffer() ; int address = Sys.getDirectBufferAddress(fb) ; // Fill the buffer whenever fb.rewind() ; fb.put(1.0f).put(0.5f).put(0.3f) ; // Call the method with the address of the buffer al.sourcefv(source, property, address) ;

[aNt]

what the numbers in:

allocateDirect(3 * 4) ?

faster is it? ok but i update the positions every time so i guess there wont be much of a speed leep.

will do anyways looks cooler

[Matzon]

allocateDirect(3 * 4) ?

allocateDirect needs to be told how many bytes it should allocate = 3 floats of each 4 bytes.

[aNt]

cool i was looking at the wrong docs. part of java.nio - i just started playing with at. cool - it seems very fast at io.. well i guess thats what everyone is on about