Ok, this is what I got. Iām not really familiar with 3D yet, so I guess the tex-coord buffer is still wrong. But the result looks ok anyhow 
[java]
/**
- Circle.
*
-
@author Martin Simons
-
@version $Id$
*/
public class Circle
extends Mesh
{
/**
- The center.
*/
private Vector3f center;
/**
- The radius.
*/
private float radius;
/**
- The samples.
*/
private int samples;
/**
- Constructs a new instance of this class.
*
-
@param radius
*/
public Circle(float radius)
{
this(Vector3f.ZERO, radius, 16);
}
/**
- Constructs a new instance of this class.
*
-
@param radius
-
@param samples
*/
public Circle(float radius, int samples)
{
this(Vector3f.ZERO, radius, samples);
}
/**
- Constructs a new instance of this class.
*
-
@param center
-
@param radius
-
@param samples
*/
public Circle(Vector3f center, float radius, int samples)
{
super();
this.center = center;
this.radius = radius;
this.samples = samples;
setMode(Mode.Lines);
updateGeometry();
}
protected void updateGeometry()
{
FloatBuffer positions = BufferUtils.createFloatBuffer(samples * 3);
FloatBuffer normals = BufferUtils.createFloatBuffer(samples * 3);
short[] indices = new short[samples * 2];
float rate = FastMath.TWO_PI / (float) samples;
float angle = 0;
for (int i = 0; i < samples; i++)
{
float x = FastMath.cos(angle) + center.x;
float z = FastMath.sin(angle) + center.z;
positions.put(x * radius).put(center.y).put(z * radius);
normals.put(new float[] { 0, 1, 0 });
indices = (short) i;
if (i < samples - 1)
indices = (short) (i + 1);
else
indices = 0;
angle += rate;
}
setBuffer(Type.Position, 3, positions);
setBuffer(Type.Normal, 3, normals);
setBuffer(Type.Index, 2, indices);
setBuffer(Type.TexCoord, 2, new float[] { 0, 0, 1, 1 });
updateBound();
}
[/java]