ContactGeometry.contactInterval ci = cgeom.mapFor(y2 - ht,
y2 - ht + cgeom.pixels_step);
// cstart = (int) Math.floor(((double) y2 - ht) * contacts_per_pixel);
ContactGeometry.contactInterval ci = cgeom.mapFor(y2 - ht,
y2 - ht + cgeom.pixels_step);
// cstart = (int) Math.floor(((double) y2 - ht) * contacts_per_pixel);