final StylingPolicy spol = style.getStylingPolicy();
if(spol instanceof ClassStylingPolicy) {
ClassStylingPolicy cspol = (ClassStylingPolicy) spol;
for(int cnum = cspol.getMinStyle(); cnum < cspol.getMaxStyle(); cnum++) {
for(Iterator<DBID> iter = cspol.iterateClass(cnum); iter.hasNext();) {
DBID cur = iter.next();
try {
final NumberVector<?, ?> vec = rel.get(cur);
double[] v = proj.fastProjectDataToRenderSpace(vec);
ml.useMarker(svgp, layer, v[0], v[1], cnum, marker_size);