public void setPointOnLine( double t , Point3D_F64 where ) {
		where.x = p.x + t*slope.x;
		where.y = p.y + t*slope.y;
		where.z = p.z + t*slope.z;
	}
public void setPointOnLine( double t , Point3D_F64 where ) {
		where.x = p.x + t*slope.x;
		where.y = p.y + t*slope.y;
		where.z = p.z + t*slope.z;
	}
public void setPointOnLine ( double t , Point3D_F64 where ) { where . x = p . x + t * slope . x ; where . y = p . y + t * slope . y ; where . z = p . z + t * slope . z ; }
where = p + t*slope.
where = p + t * slope .