added docu for Curves in 3d

Quadrical_kernel_3/doc_tex/Quadrical_kernel_3_ref/CCurve_3.tex

@@ -0,0 +1,12 @@
+
+\begin{ccRefConcept}{QuadricalKernel_3::Curve_3}
+
+Concept for space curves in 3D that describes the spatial intersection curve
+of two quadrics.
+
+\ccRefines
+CopyConstructible, Assignable, DefaultConstructible
+
+\ccHasModels
+\ccc{CGAL::Curve_3<QuadricalKernel_3>}
+\end{ccRefConcept}

Quadrical_kernel_3/doc_tex/Quadrical_kernel_3_ref/Curve_3.tex

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+\begin{ccRefClass}{Curve_3<QuadricalKernel_3>}
+
+%\ccInclude{CGAL/Curve_3.h}
+
+\ccIsModel
+
+\ccc{QuadricalKernel_3::Curve_3}
+
+\ccCreation
+\ccCreationVariable{sc}
+
+\ccThree{Curve_point_3}{ca.is_x_monotone()}{}
+\ccThreeToTwo
+
+\ccConstructor{Curve_3(const QuadricalKernel_3::Quadric_3& q1, 
+                       const QuadricalKernel_3::Quadric_3& q2)}
+                     {
+                       Constructs the space curve that is defined by the intersection of \ccc{q1} and \ccc{q2}.}
+                     
+\ccAccessFunctions
+
+\ccThree{QuadricalKernel_3::Curve_point_3}{arc.is_x_monotone()}{}
+\ccThreeToTwo
+
+\ccMethod{template < class OutputIterator > OutputIterator defining_surfaces(OutputIterator oi);}{}
+
+\ccMethod{QuadricalKernel_3::Bbox_3 bbox();}{}
+
+\ccFunction{bool operator==(const Curve_3<QuadricalKernel_3> &p,
+		            const Curve_3<QuadricalKernel_3> &q);}{}
+
+\end{ccRefClass}