private void allocateVertices() {
// allocate vertices
final int verts = _axisSamples * (_radialSamples + 1) + (_closed ? 2 : 0);
_meshData.setVertexBuffer(BufferUtils.createVector3Buffer(_meshData.getVertexBuffer(), verts));
// allocate normals if requested
_meshData.setNormalBuffer(BufferUtils.createVector3Buffer(_meshData.getNormalBuffer(), verts));
// allocate texture coordinates
_meshData.setTextureBuffer(BufferUtils.createVector2Buffer(verts), 0);
final int count = ((_closed ? 2 : 0) + 2 * (_axisSamples - 1)) * _radialSamples;
if (_meshData.getIndices() == null || _meshData.getIndices().getBufferLimit() != 3 * count) {
_meshData.setIndices(BufferUtils.createIndexBufferData(3 * count, verts - 1));
}
setGeometryData();
setIndexData();
}
