Geom2d_Curve.hxx File Reference

#include <Standard.hxx>
#include <Standard_DefineHandle.hxx>
#include <Handle_Geom2d_Curve.hxx>
#include <Geom2d_Geometry.hxx>
#include <Standard_Real.hxx>
#include <Standard_Boolean.hxx>
#include <GeomAbs_Shape.hxx>
#include <Standard_Integer.hxx>

Data Structures
class	Geom2d_Curve
	The abstract class Curve describes the common behavior of curves in 2D space. The Geom2d package provides numerous concrete classes of derived curves, including lines, circles, conics, Bezier or BSpline curves, etc. The main characteristic of these curves is that they are parameterized. The Geom2d_Curve class shows: how to work with the parametric equation of a curve in order to calculate the point of parameter u, together with the vector tangent and the derivative vectors of order 2, 3,..., N at this point; how to obtain general information about the curve (for example, level of continuity, closed characteristics, periodicity, bounds of the parameter field); how the parameter changes when a geometric transformation is applied to the curve or when the orientation of the curve is inverted. All curves must have a geometric continuity: a curve is at least "C0". Generally, this property is checked at the time of construction or when the curve is edited. Where this is not the case, the documentation explicitly states so. Warning The Geom2d package does not prevent the construction of curves with null length or curves which self-intersect. More...