Hi.
My first Jogl testes by manually drawing polygons (via glBegin, glVertex3f and so on) work fine. :-)
However using the faster glVertexPointer() and then glDrawElements() doesn't do anything, except to throw exceptions to me after a while. :-(
From my former Gl4java tests I got the vertex array and the connection array. However moving this code to Jogl fails for me so far.
What am I doing wrong? Any hints appreciated. :-)
Here's the relevant part:
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ByteBuffer bbuffer = ByteBuffer.allocateDirect(mypoints.length * SIZE_FLOAT);
for (short i = 0; i < mypoints.length; i++) {
bbuffer.putFloat(mypoints[i]);
}
bbuffer.rewind();
bufPoints = bbuffer.asFloatBuffer();
ByteBuffer bbuffer = ByteBuffer.allocateDirect(conns.length * SIZE_SHORT);
for (short i = 0; i < conns.length; i++) {
bbuffer.putShort(conns[i]);
}
bbuffer.rewind();
bufConns = bbuffer.asShortBuffer();
gl.glEnableClientState(gl.GL_VERTEX_ARRAY);
gl.glVertexPointer(3, gl.GL_FLOAT, 0, bufPoints);
gl.glDrawElements(gl.GL_TRIANGLES, bufConns.limit(), gl.GL_SHORT, bufConns);
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Do I have to use "gl.GL_UNSIGNED_SHORT" or "gl.GL_SHORT" in the DrawElements-call? None of them work for me. ;-)
By the way: do I really have to specify the Float_Size (4 Bytes on many machines) and Short_Size (2 bytes on many machines) ? However: if my Java application is to run on a platform where I don't know its Float_Size?
Greetings and thank you.
-ric
