.. role:: bfit
   :class: bfit

TWO-DIMENSIONAL CURVES
==============================
.. _TWO-DIMENSIONAL_CURVES_:

Two-dimensional curves are used to define surface parameter domains, to construct planar sketches, to build three-dimensional curves on surfaces, curves of surface intersections, and projections of three-dimensional curves onto surfaces and planes of local coordinate systems.  Many two-dimensional curves are organized in the same way as three-dimensional curves, with the only difference that two-dimensional points and vectors are used instead of three-dimensional ones.  Vectors, position vectors of points, and matrices in a two-dimensional space will be denoted by Latin letters set in :bfit:`bold italic` type. 

.. toctree::
   :maxdepth: 1

   subsections/EN/MbLine_Two-Dimensional_Straight_Line
   subsections/EN/MbLineSegment_Two-Dimensional_Straight_Line_Segment
   subsections/EN/MbPointCurve_Two-Dimensional_Curve-Point
   subsections/EN/MbProjCurve_Two-Dimensional_Projection_Curve
   subsections/EN/MbContour_Two-Dimensional_Contour

   .. subsections/RU/MbCurve_Two-Dimensional_Curve
   subsections/RU/MbArc_Two-Dimensional_Elliptical_Arc
   subsections/RU/MbPolyline_Two-Dimensional_Polyline
   subsections/RU/MbNurbs_Two-Dimensional_NURBS-Curve
   subsections/RU/MbHermit_Two-Dimensional_Hermite_Curve
   subsections/RU/MbBezier_Two-Dimensional_Bezier_Composite_Curve
   subsections/RU/MbCubicSpline_Two-Dimensional_Cubic_Spline
   subsections/RU/MbTrimmedCurve_Two-Dimensional_Truncated_Curve
   subsections/RU/MbReparamCurve_Two-Dimensional_Reparameterized_Curve
   subsections/RU/MbOffsetCurve_Two-Dimensional_Equidistant_Curve
   subsections/RU/MbCharacterCurve_Two-Dimensional_Character_Curve
   subsections/RU/MbCosinusoid_Two-Dimensional_Cosine_Wave