-- File:	Geom.cdl
-- Created:	Tue Mar  9 18:50:59 1993
-- Author:	JCV
--		<fid@phylox>
-- Copyright:	 Matra Datavision 1993


package Geom 

        --- Purpose :
        --  This package contains the definition of the geometric objects 
        --  such as point, vector, axis placement, curves, surfaces and the
        --  description of the geometric transformations available for these
        --  objects.
        --  All these entities are defined in 3D space.
        --  This package gives the possibility :
        --     . to create geometric objects,
        --     . to have information about them,
        --     . to modify these objects.
        --  This package uses the services of the package gp (Geometric
        --  processor) which describes non-persistent objects for algebraic
        --  calculus and basic analytic geometry. The purpose of this package
        --  is to create persistent geometric objects and to read geometric
        --  information about these objects. Complexes geometric algorithmes
        --  are not described in this package.     At construction time,
        --  elementary verifications are done to verify that the objects
        --  are coherents, but some verifications which require complex
        --  algorithmes (for example to check that a curve has not null
        --  length or does not self-intersect) must be done before the 
        --  construction of the geometric objects. 

uses  
    MMgt,  
    Standard,
    GeomAbs, 
    TCollection,
    TColStd, 
    gp, 
    TColgp 

--, Plate

is 



        ---Group:  Exceptions 

exception UndefinedDerivative inherits DomainError  from  Standard;
exception UndefinedValue inherits DomainError from  Standard;

    class SequenceOfBSplineSurface 
    	instantiates Sequence from TCollection (BSplineSurface from Geom);
    class HSequenceOfBSplineSurface 
    	instantiates HSequence from TCollection (BSplineSurface from Geom,
    	    	    	    	SequenceOfBSplineSurface from Geom);
--    class SequenceOfBoundedSurface 
--    	instantiates Sequence from TCollection (BoundedSurface from Geom); 

    class SequenceOfSurface 
    	instantiates Sequence from TCollection (Surface from Geom);
	
    class HSequenceOfSurface 
    	instantiates HSequence from TCollection (Surface from Geom,
    	    	    	    	SequenceOfSurface from Geom);
				
--    class HSequenceOfBoundedSurface 
--    	instantiates HSequence from TCollection (BoundedSurface from Geom,
--    	    	    	    	SequenceOfBoundedSurface from Geom);
--  class SequenceNodeOfSequenceOfSurface
--    	instantiates SeqNode from TCollection (Surface from Geom);
--  class HSequenceOfSurface 
--    	instantiates HSequence from TCollection (Surface from Geom,
--    	    	    	    	SequenceOfSurface from Geom);

        ---Group: Geometric entities 

  class Transformation;


  deferred class Geometry;


     deferred class Point;
              class  CartesianPoint;


     deferred class Vector;
              class Direction;
              class VectorWithMagnitude;
     

     deferred class AxisPlacement;
              class Axis1Placement;
              class Axis2Placement;


     deferred class Curve;

              class Line;

              deferred class Conic;
                       class Circle;
                       class Ellipse;
                       class Hyperbola;
                       class Parabola;

              deferred class BoundedCurve;
                       class BezierCurve;
                       class BSplineCurve;
                       class TrimmedCurve;

              class  OffsetCurve;


     deferred class Surface;

              deferred class ElementarySurface;
                       class Plane;
                       class ConicalSurface;
                       class CylindricalSurface;
                       class SphericalSurface;
                       class ToroidalSurface;

              deferred class SweptSurface;
                       class SurfaceOfLinearExtrusion;
                       class SurfaceOfRevolution;

              deferred class BoundedSurface;
                       class BezierSurface;
                       class BSplineSurface;
                       class RectangularTrimmedSurface;
               
              
              class OffsetSurface;
	      
private       class OsculatingSurface;

--    	      class PlateSurface ;
end Geom;