public float PictureY(PointF p) { return(PointOps.DotProduct(p, invVertNormal)); }
public float TableY(PointF p) { return(PointOps.DotProduct(p, vertNormal)); }
public float PictureX(PointF p) { return(PointOps.DotProduct(p, invHorizNormal)); }
public float TableX(PointF p) { return(PointOps.DotProduct(p, horizNormal)); }