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3789ede5ee
1. Increase the tolerance of approximation. 2. Update auxiliary Draw command "topoload" for usage of option "-approx". Add missing comment
129 lines
4.4 KiB
C++
129 lines
4.4 KiB
C++
// Created on: 1995-09-18
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// Created by: Bruno DUMORTIER
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// Copyright (c) 1995-1999 Matra Datavision
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// Copyright (c) 1999-2014 OPEN CASCADE SAS
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//
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// This file is part of Open CASCADE Technology software library.
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//
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// This library is free software; you can redistribute it and/or modify it under
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// the terms of the GNU Lesser General Public License version 2.1 as published
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// by the Free Software Foundation, with special exception defined in the file
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// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
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// distribution for complete text of the license and disclaimer of any warranty.
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//
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// Alternatively, this file may be used under the terms of Open CASCADE
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// commercial license or contractual agreement.
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#ifndef _BRepOffsetAPI_MakeOffset_HeaderFile
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#define _BRepOffsetAPI_MakeOffset_HeaderFile
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#include <Standard.hxx>
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#include <Standard_DefineAlloc.hxx>
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#include <Standard_Handle.hxx>
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#include <Standard_Boolean.hxx>
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#include <GeomAbs_JoinType.hxx>
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#include <TopoDS_Face.hxx>
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#include <TopTools_ListOfShape.hxx>
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#include <BRepFill_ListOfOffsetWire.hxx>
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#include <BRepBuilderAPI_MakeShape.hxx>
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#include <Standard_Real.hxx>
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class StdFail_NotDone;
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class TopoDS_Face;
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class TopoDS_Wire;
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class TopoDS_Shape;
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//! Describes algorithms for offsetting wires from a set of
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//! wires contained in a planar face.
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//! A MakeOffset object provides a framework for:
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//! - defining the construction of an offset,
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//! - implementing the construction algorithm, and
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//! - consulting the result.
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class BRepOffsetAPI_MakeOffset : public BRepBuilderAPI_MakeShape
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{
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public:
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DEFINE_STANDARD_ALLOC
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//! Constructs an algorithm for creating an empty offset
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Standard_EXPORT BRepOffsetAPI_MakeOffset();
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//! Constructs an algorithm for creating an algorithm
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//! to build parallels to the spine Spine
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Standard_EXPORT BRepOffsetAPI_MakeOffset(const TopoDS_Face& Spine, const GeomAbs_JoinType Join = GeomAbs_Arc, const Standard_Boolean IsOpenResult = Standard_False);
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//! Initializes the algorithm to construct parallels to the spine Spine.
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//! Join defines the type of parallel generated by the
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//! salient vertices of the spine.
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//! The default type is GeomAbs_Arc where the vertices generate
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//! sections of a circle.
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//! If join type is GeomAbs_Intersection, the edges that
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//! intersect in a salient vertex generate the edges
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//! prolonged until intersection.
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Standard_EXPORT void Init (const TopoDS_Face& Spine, const GeomAbs_JoinType Join = GeomAbs_Arc, const Standard_Boolean IsOpenResult = Standard_False);
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Standard_EXPORT BRepOffsetAPI_MakeOffset(const TopoDS_Wire& Spine, const GeomAbs_JoinType Join = GeomAbs_Arc, const Standard_Boolean IsOpenResult = Standard_False);
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//! Initialize the evaluation of Offseting.
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Standard_EXPORT void Init (const GeomAbs_JoinType Join = GeomAbs_Arc, const Standard_Boolean IsOpenResult = Standard_False);
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//! Set approximation flag
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//! for convertion input contours into ones consisting of
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//! 2D circular arcs and 2D linear segments only.
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Standard_EXPORT void SetApprox (const Standard_Boolean ToApprox);
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//! Initializes the algorithm to construct parallels to the wire Spine.
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Standard_EXPORT void AddWire (const TopoDS_Wire& Spine);
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//! Computes a parallel to the spine at distance Offset and
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//! at an altitude Alt from the plane of the spine in relation
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//! to the normal to the spine.
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//! Exceptions: StdFail_NotDone if the offset is not built.
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Standard_EXPORT void Perform (const Standard_Real Offset, const Standard_Real Alt = 0.0);
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//! Builds the resulting shape (redefined from MakeShape).
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Standard_EXPORT virtual void Build() Standard_OVERRIDE;
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//! returns a list of the created shapes
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//! from the shape <S>.
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Standard_EXPORT virtual const TopTools_ListOfShape& Generated (const TopoDS_Shape& S) Standard_OVERRIDE;
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//! Converts each wire of the face into contour consisting only of
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//! arcs and segments. New 3D curves are built too.
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Standard_EXPORT static TopoDS_Face ConvertFace (const TopoDS_Face& theFace,
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const Standard_Real theAngleTolerance);
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protected:
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private:
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Standard_Boolean myIsInitialized;
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Standard_Boolean myLastIsLeft;
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GeomAbs_JoinType myJoin;
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Standard_Boolean myIsOpenResult;
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Standard_Boolean myIsToApprox;
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TopoDS_Face myFace;
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TopTools_ListOfShape myWires;
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BRepFill_ListOfOffsetWire myLeft;
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BRepFill_ListOfOffsetWire myRight;
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};
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#endif // _BRepOffsetAPI_MakeOffset_HeaderFile
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