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114 lines
5.2 KiB
C++
114 lines
5.2 KiB
C++
// Created on: 1992-08-26
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// Created by: Jean Louis FRENKEL
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// Copyright (c) 1992-1999 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 _Prs3d_HeaderFile
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#define _Prs3d_HeaderFile
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#include <Graphic3d_ArrayOfPrimitives.hxx>
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#include <Standard_DefineAlloc.hxx>
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#include <Prs3d_Drawer.hxx>
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#include <Prs3d_NListOfSequenceOfPnt.hxx>
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#include <Prs3d_Presentation.hxx>
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class Poly_Triangulation;
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//! The Prs3d package provides the following services
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//! - a presentation object (the context for all
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//! modifications to the display, its presentation will be
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//! displayed in every view of an active viewer)
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//! - an attribute manager governing how objects such
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//! as color, width, and type of line are displayed;
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//! these are generic objects, whereas those in
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//! StdPrs are specific geometries and topologies.
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//! - generic algorithms providing default settings for
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//! objects such as points, curves, surfaces and shapes
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//! - a root object which provides the abstract
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//! framework for the DsgPrs definitions at work in
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//! display of dimensions, relations and trihedra.
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class Prs3d
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{
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public:
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DEFINE_STANDARD_ALLOC
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//! draws an arrow at a given location, with respect
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//! to a given direction.
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Standard_EXPORT static Standard_Boolean MatchSegment (const Standard_Real X, const Standard_Real Y, const Standard_Real Z, const Standard_Real aDistance, const gp_Pnt& p1, const gp_Pnt& p2, Standard_Real& dist);
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//! Computes the absolute deflection value based on relative deflection Prs3d_Drawer::DeviationCoefficient().
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//! @param theBndMin [in] bounding box min corner
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//! @param theBndMax [in] bounding box max corner
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//! @param theDeviationCoefficient [in] relative deflection coefficient from Prs3d_Drawer::DeviationCoefficient()
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//! @return absolute deflection coefficient based on bounding box dimensions
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static Standard_Real GetDeflection (const Graphic3d_Vec3d& theBndMin,
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const Graphic3d_Vec3d& theBndMax,
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const Standard_Real theDeviationCoefficient)
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{
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const Graphic3d_Vec3d aDiag = theBndMax - theBndMin;
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return Max (aDiag.maxComp() * theDeviationCoefficient * 4.0, Precision::Confusion());
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}
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//! Computes the absolute deflection value based on relative deflection Prs3d_Drawer::DeviationCoefficient().
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//! @param theBndBox [in] bounding box
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//! @param theDeviationCoefficient [in] relative deflection coefficient from Prs3d_Drawer::DeviationCoefficient()
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//! @param theMaximalChordialDeviation [in] absolute deflection coefficient from Prs3d_Drawer::MaximalChordialDeviation()
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//! @return absolute deflection coefficient based on bounding box dimensions or theMaximalChordialDeviation if bounding box is Void or Infinite
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static Standard_Real GetDeflection (const Bnd_Box& theBndBox,
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const Standard_Real theDeviationCoefficient,
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const Standard_Real theMaximalChordialDeviation)
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{
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if (theBndBox.IsVoid())
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{
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return theMaximalChordialDeviation;
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}
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Bnd_Box aBndBox = theBndBox;
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if (theBndBox.IsOpen())
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{
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if (!theBndBox.HasFinitePart())
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{
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return theMaximalChordialDeviation;
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}
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aBndBox = theBndBox.FinitePart();
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}
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Graphic3d_Vec3d aVecMin, aVecMax;
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aBndBox.Get (aVecMin.x(), aVecMin.y(), aVecMin.z(), aVecMax.x(), aVecMax.y(), aVecMax.z());
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return GetDeflection (aVecMin, aVecMax, theDeviationCoefficient);
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}
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//! Assembles array of primitives for sequence of polylines.
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//! @param thePoints [in] the polylines sequence
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//! @return array of primitives
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Standard_EXPORT static Handle(Graphic3d_ArrayOfPrimitives) PrimitivesFromPolylines (const Prs3d_NListOfSequenceOfPnt& thePoints);
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//! Add primitives into new group in presentation and clear the list of polylines.
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Standard_EXPORT static void AddPrimitivesGroup (const Handle(Prs3d_Presentation)& thePrs,
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const Handle(Prs3d_LineAspect)& theAspect,
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Prs3d_NListOfSequenceOfPnt& thePolylines);
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//! Add triangulation free edges into sequence of line segments.
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//! @param theSegments [out] sequence of line segments to fill
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//! @param thePolyTri [in] triangulation to process
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//! @param theLocation [in] transformation to apply
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Standard_EXPORT static void AddFreeEdges (TColgp_SequenceOfPnt& theSegments,
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const Handle(Poly_Triangulation)& thePolyTri,
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const gp_Trsf& theLocation);
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};
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#endif // _Prs3d_HeaderFile
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