/// if zin > z, lift CLPoint and update cc-point, and return true
public bool liftZ(double zin, CCPoint ccp)
{
if (zin > z)
{
z = zin;
if (cc != null)
{
if (cc != null)
{
cc.Dispose();
}
}
cc = new CCPoint(ccp);
return(true);
}
else
{
return(false);
}
}
