Changes between Version 6 and Version 7 of FDORfc59

Timestamp:

Apr 10, 2011, 3:45:41 PM (13 years ago)

Author:

gregboone

Comment:

--

FDORfc59

@@ -93 +93 @@
     FdoGeometryComponentType_CircleSegment = 137
 };
+}}} 
+
+
+=== IEllipticalArcSegment  === 
+
+{{{
+/// \brief
+/// The FdoIEllipticalArcSegment class represets an Elliptical Arc Segment 
+/// geometry type. EllipticalArcSegment can describe portions of, or a full 
+/// ellipse. If describing a full ellipse, the start and end points are identical
+/// and the mid-point is the diametrically opposite point on the ellipse.
+///
+/// \remarks
+/// Two foci were specified as opposed to major/minor axes so that the 
+/// API can derive this class from ArcSegmentAbstract and CurveSegmentAbstract, 
+/// thus reusing the concepts of start/mid/end points as defined in the base
+/// classes. In this manner the API can maintain a common look/feel when defining
+/// arc types. The expectation is that a Geometry API utility method will be
+/// provided that will allow conversion to major/minor axis.
+///
+/// The semimajor axis and the semiminor axis are one half of the major and minor 
+/// diameters, respectively. These are sometimes called the major and minor semi-axes, 
+/// the major and minor semiaxes,or major radius and minor radius.
+///
+/// The foci of the ellipse are two special points on the ellipse's major 
+/// axis and are equidistant from the center point. The sum of the distances from any 
+/// point on the ellipse to those two foci is constant and equal to the major 
+/// diameter. Each of these two points is called a focus of the ellipse.
+///
+class FdoIEllipticalArcSegment : public FdoIArcSegmentAbstract
+{
+public:
+
+    /// \brief
+    /// Gets the two focal positions of this Ellipse Geometry.
+    /// 
+    /// \return
+    /// Returns the two focal positions of the Ellipse as a collection 
+    /// of two positions.
+    /// 
+    virtual FdoIDirectPositionCollection const * GetFocalPositions() const = 0;
+
+    /// \brief
+    /// Gets the two focal positions of this Ellipse Geometry as an array.
+    /// The ordinates are in the order XYZMXYZM, with only those present 
+    /// according to the dimensionality.
+    /// 
+    /// \return
+    /// Returns the two focal positions of the Ellipse as a collection 
+    /// 
+    virtual const double * GetFocalPositionOrdinates() = 0;
+
+protected:
+
+    /// \brief
+    /// Constructs a default instance.
+    /// 
+    FdoIEllipticalArcSegment() {};
+
+    /// \brief
+    /// Default destructor.
+    /// 
+    virtual ~FdoIEllipticalArcSegment() {};
+};
 }}}
+
+
+