| | The root class for bounded surfaces in 3D space. A
bounded surface is defined by a rectangle in its 2D parametric space, i.e.
- its u parameter, which ranges between two finite
values u0 and u1, referred to as "First u <br>
parameter" and "Last u parameter" respectively, and
- its v parameter, which ranges between two finite
values v0 and v1, referred to as "First v <br>
parameter" and the "Last v parameter" respectively.
The surface is limited by four curves which are the
boundaries of the surface:
- its u0 and u1 isoparametric curves in the u parametric direction, and
- its v0 and v1 isoparametric curves in the v parametric direction.
A bounded surface is finite.
The common behavior of all bounded surfaces is
described by the Geom_Surface class.
The Geom package provides three concrete
implementations of bounded surfaces:
- Geom_BezierSurface,
- Geom_BSplineSurface, and
- Geom_RectangularTrimmedSurface.
The first two of these implement well known
mathematical definitions of complex surfaces, the third
trims a surface using four isoparametric curves, i.e. it
limits the variation of its parameters to a rectangle in
2D parametric space.
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1.6.3