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…
al.source3f(source, property, x, y, z);
where property is AL.POSITION
Cas 
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.
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
That last parameter would be the address of a FloatBuffer. Do something like:
// 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) ;
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
[quote] allocateDirect(3 * 4) ?
[/quote]
allocateDirect needs to be told how many bytes it should allocate = 3 floats of each 4 bytes.
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