Integration of OCCT 6.5.0 from SVN

src/GeomAbs/GeomAbs.cdl

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+-- File:	GeomAbs.cdl
+-- Created:	Mon Feb 22 15:03:40 1993
+-- Author:	Modelistation
+--		<model@sdsun2>
+---Copyright:	 Matra Datavision 1993
+
+
+
+package GeomAbs 
+
+	---Purpose: This package gives resources for Geometric applications
+	--         
+	-- it contains :
+	--          CurveType enumeration to describe the different type of 
+	--          curves 
+	--          
+	--          SurfaceType enumeration to describe the different type of
+	--          surfaces
+	--          
+	--          Shape enumeration to  describe the continuity of curve
+	--           or surface
+	--           
+	--          CurveForm enumeration to describe the specific form of
+	--          curve 
+	--           
+	--          SurfaceForm enumeration to describe the specific form of
+	--          surface
+	--          
+	--           BSplKnotDistribution enumeration to describe the 
+	--           repartition of set of knots
+	--           
+	--           UVSense enumeration to describe the orientation of 
+	--           the parametric surface 
+uses Standard 
+
+is
+
+enumeration CurveType 
+       is  Line, Circle, Ellipse, Hyperbola, Parabola,
+           BezierCurve, BSplineCurve,OtherCurve end;
+    	---Purpose:
+    	-- Identifies the type of a curve.
+enumeration SurfaceType 
+       is  Plane, Cylinder, Cone ,Sphere ,Torus, BezierSurface, 
+           BSplineSurface, SurfaceOfRevolution , SurfaceOfExtrusion,
+	   OffsetSurface,OtherSurface end;
+
+enumeration Shape is C0, G1, C1, G2, C2, C3, CN;
+        --- Purpose :
+        -- Provides information about the continuity of a curve:
+    	-- -   C0: only geometric continuity.
+    	-- -   G1: for each point on the curve, the tangent vectors
+    	--   "on the right" and "on the left" are collinear with the same orientation.
+    	-- -   C1: continuity of the first derivative. The "C1" curve is
+    	--   also "G1" but, in addition, the tangent vectors " on the
+    	--   right" and "on the left" are equal.
+    	-- -   G2: for each point on the curve, the normalized
+    	-- normal vectors "on the right" and "on the left" are equal.
+    	-- -   C2: continuity of the second derivative.
+    	-- -   C3: continuity of the third derivative.
+    	-- -   CN: continuity of the N-th derivative, whatever is the
+    	--   value given for N (infinite order of continuity).
+    	-- Also provides information about the continuity of a surface:
+    	-- -   C0: only geometric continuity.
+    	-- -   C1: continuity of the first derivatives; any
+    	--   isoparametric (in U or V) of a surface "C1" is also "C1".
+    	-- -   G2: for BSpline curves only; "on the right" and "on the
+    	--   left" of a knot the computation of the "main curvature
+    	-- radii" and the "main directions" (when they exist) gives the same result.
+    	-- -   C2: continuity of the second derivative.
+    	-- -   C3: continuity of the third derivative.
+    	-- -   CN: continuity of any N-th derivative, whatever is the
+    	--   value given for N (infinite order of continuity).
+    	-- We may also say that a surface is "Ci" in u, and "Cj" in v
+    	-- to indicate the continuity of its derivatives up to the order
+    	-- i in the u parametric direction, and j in the v parametric direction.
+
+
+enumeration SurfaceForm is
+
+PlanarForm, ConicalForm, CylindricalForm, ToroidalForm, SphericalForm,
+RevolutionForm, RuledForm, QuadricForm, OtherSurfaceForm;
+        --- Purpose :
+        --  This enumeration is used to note specific surface form.
+
+
+
+enumeration CurveForm is
+
+PolylineForm, CircularForm, EllipticForm, HyperbolicForm, ParabolicForm,
+OtherCurveForm;
+        --- Purpose :
+        --  This enumeration is used to note specific curve form.
+
+
+enumeration BSplKnotDistribution is
+NonUniform, Uniform, QuasiUniform, PiecewiseBezier;
+        --- Purpose :
+        --  This enumeration is used in the classes BSplineCurve and
+        --  BSplineSurface to describe the repartition of set of knots.
+        --  (comments in classes BSplineCurve and BSplineSurface)
+
+
+enumeration UVSense is SameUV, SameU, SameV, OppositeUV;
+        --- Purpose :
+        --  This enumeration is used in the class RectangularTrimmedSurface
+        --  to compare the orientation of the basic surface and the orientation
+        --  of the trimmed surface and in the class ElementarySurface to know 
+        --  the direction of parametrization by comparison with the default
+        --  construction mode.
+
+enumeration IsoType is IsoU,IsoV,NoneIso;
+	---Purpose: this enumeration describes if a curve is an U isoparaetric
+	--          or V isoparametric
+
+
+enumeration JoinType is Arc, Tangent, Intersection;
+	---Purpose: Characterizes the type of a join, built by an algorithm for
+    	-- constructing parallel curves, between two consecutive
+    	-- arcs of a contour parallel to a given contour.
+
+end GeomAbs;