vpt0.set(vpt1);
vpt1.scaleAdd(1, vTemp2, pt1f);
if (i == 0)
vpt2.set(vpt1);
viewer.transformPoint(vpt1, screens[i]);
mat.transform(vTemp2);
}
if (dmesh.isVector && !dmesh.nohead) {
renderArrowHead(vpt0, vpt1, 0.3f, false, false);
viewer.transformPoint(pt1f, screens[nPoints - 1]);
}