.. role:: blue
   :class: blue

MbRect1D Univariate Dimension
=============================
.. _MbRect1D_Univariate_Dimension_:

.. kernel version: 118059

The :blue:`MbRect1D` class is declared in the *mb_rect1d.h* file. 

The :blue:`MbRect1D` univariate dimension describes a one-dimensional area, for example, a curve parameter domain, and it is defined by two numbers: *zmin* and *zmax*:

.. figure:: /MODELER/ELEMENTARY_OBJECTS/pictures/O.1.7.1.png
   :width: 12cm
   :align: center


The *zmin* and *zmax* numbers define the start and the end boundary of the area. If a one-dimensional area is not defined, then the univariate dimension is considered empty and *zmin* > *zmax*. For an empty univariate dimension, the :blue:`IsEmpty`\() method returns *true*.