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-- File: IGESConvGeom.cdl
-- Created: Thu Sep 1 15:31:13 1994
-- Author: Christian CAILLET
-- <cky@anion>
---Copyright: Matra Datavision 1994
package IGESConvGeom
---Purpose : This package is intended to gather geometric conversion which
-- are not immediate but can be used for several purposes :
-- mainly, standard conversion to and from CasCade geometric and
-- topologic data, and adaptations of IGES files as required
-- (as replacing Spline entities to BSpline equivalents).
uses Standard, gp, TColgp, Geom, Geom2d, IGESGeom
is
class GeomBuilder;
---Purpose : basic tool to build curves from IGESGeom (arrays of points,
-- Transformations, evaluation of points in a datum)
SplineCurveFromIGES
(igesent : SplineCurve from IGESGeom;
epscoef, epsgeom : Real;
result : out mutable BSplineCurve from Geom)
returns Integer;
---Purpose : Converts a SplineCurve from IGES to a BSplineCurve from CasCade
-- <epscoef> gives tolerance to consider coefficient to be nul
-- <epsgeom> gives tolerance to consider poles to be equal
-- The returned value is a status with these possible values :
-- - 0 OK, done
-- - 1 the result is not guaranteed to be C0 (with <epsgeom>)
-- - 2 SplineType not processed (allowed : max 3)
-- (no result produced)
-- - 3 error during creation of control points
-- (no result produced)
-- - 4 polynomial equation is not correct (no result produced)
-- - 5 less than one segment (no result produced)
IncreaseCurveContinuity
(curve : mutable BSplineCurve from Geom;
epsgeom : Real;
continuity : Integer = 2) returns Integer;
---Purpose : Tries to increase curve continuity with tolerance <epsgeom>
-- <continuity> is the new desired continuity, can be 1 or 2
-- (more than 2 is considered as 2).
-- Returns the new maximum continuity obtained on all knots.
-- Remark that, for instance with <continuity> = 2, even if not
-- all the knots can be passed to C2, all knots which can be are.
IncreaseCurveContinuity
(curve : mutable BSplineCurve from Geom2d;
epsgeom : Real;
continuity : Integer = 2) returns Integer;
SplineSurfaceFromIGES
(igesent : SplineSurface from IGESGeom;
epscoef, epsgeom : Real;
result : out mutable BSplineSurface from Geom)
returns Integer;
---Purpose : Converts a SplineSurface from IGES to a BSplineSurface from CasCade
-- <epscoef> gives tolerance to consider coefficient to be nul
-- <epsgeom> gives tolerance to consider poles to be equal
-- The returned value is a status with these possible values :
-- - 0 OK, done
-- - 1 the result is not guaranteed to be C0 (with <epsgeom>)
-- - 2 degree is not compatible with code boundary type
-- (warning) but C0 is OK
-- - 3 idem but C0 is not guaranteed (warning)
-- - 4 degree has been determined to be nul, either in U or V
-- (no result produced)
-- - 5 less than one segment in U or V (no result produced)
IncreaseSurfaceContinuity
(surface : mutable BSplineSurface from Geom;
epsgeom : Real;
continuity : Integer = 2) returns Integer;
---Purpose : Tries to increase Surface continuity with tolerance <epsgeom>
-- <continuity> is the new desired continuity, can be 1 or 2
-- (more than 2 is considered as 2).
-- Returns the new maximum continuity obtained on all knots.
-- Remark that, for instance with <continuity> = 2, even if not
-- all the knots can be passed to C2, all knots which can be are.
end IGESConvGeom;
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