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973c2be1e1
The copying permission statements at the beginning of source files updated to refer to LGPL. Copyright dates extended till 2014 in advance.
98 lines
3.6 KiB
C++
98 lines
3.6 KiB
C++
// 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
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// under the terms of the GNU Lesser General Public 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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#include <Prs3d_Arrow.ixx>
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#include <Graphic3d_Group.hxx>
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#include <Graphic3d_ArrayOfSegments.hxx>
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#include <Graphic3d_ArrayOfPolylines.hxx>
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//=======================================================================
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//function : Draw
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//purpose :
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//=======================================================================
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void Prs3d_Arrow::Draw(const Handle(Prs3d_Presentation)& aPresentation,
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const gp_Pnt& aLocation,
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const gp_Dir& aDirection,
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const Quantity_PlaneAngle anAngle,
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const Quantity_Length aLength)
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{
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Quantity_Length dx,dy,dz; aDirection.Coord(dx,dy,dz);
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//
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// Point of the arrow:
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Quantity_Length xo,yo,zo; aLocation.Coord(xo,yo,zo);
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// Center of the base circle of the arrow:
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Quantity_Length xc = xo - dx * aLength;
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Quantity_Length yc = yo - dy * aLength;
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Quantity_Length zc = zo - dz * aLength;
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// Construction of i,j mark for the circle:
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Quantity_Length xn=0., yn=0., zn=0.;
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if ( Abs(dx) <= Abs(dy) && Abs(dx) <= Abs(dz)) xn=1.;
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else if ( Abs(dy) <= Abs(dz) && Abs(dy) <= Abs(dx)) yn=1.;
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else zn=1.;
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Quantity_Length xi = dy * zn - dz * yn;
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Quantity_Length yi = dz * xn - dx * zn;
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Quantity_Length zi = dx * yn - dy * xn;
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Quantity_Length Norme = sqrt ( xi*xi + yi*yi + zi*zi );
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xi = xi / Norme; yi = yi / Norme; zi = zi/Norme;
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const Quantity_Length xj = dy * zi - dz * yi;
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const Quantity_Length yj = dz * xi - dx * zi;
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const Quantity_Length zj = dx * yi - dy * xi;
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const Standard_Integer NbPoints = 15;
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Handle(Graphic3d_ArrayOfSegments) aPrims1 = new Graphic3d_ArrayOfSegments(2*NbPoints);
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Handle(Graphic3d_ArrayOfPolylines) aPrims2 = new Graphic3d_ArrayOfPolylines(NbPoints+1);
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gp_Pnt p1;
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const Standard_Real Tg=tan(anAngle);
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for (Standard_Integer i = 1; i <= NbPoints ; i++)
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{
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const Standard_Real cosinus = cos ( 2 * M_PI / NbPoints * (i-1) );
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const Standard_Real sinus = sin ( 2 * M_PI / NbPoints * (i-1) );
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const gp_Pnt pp(xc + (cosinus * xi + sinus * xj) * aLength * Tg,
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yc + (cosinus * yi + sinus * yj) * aLength * Tg,
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zc + (cosinus * zi + sinus * zj) * aLength * Tg);
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aPrims1->AddVertex(aLocation);
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aPrims1->AddVertex(pp);
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if(i==1) p1 = pp;
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aPrims2->AddVertex(pp);
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}
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aPrims2->AddVertex(p1);
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Prs3d_Root::CurrentGroup(aPresentation)->AddPrimitiveArray(aPrims1);
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Prs3d_Root::CurrentGroup(aPresentation)->AddPrimitiveArray(aPrims2);
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}
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//=======================================================================
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//function : Fill
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//purpose :
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//=======================================================================
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void Prs3d_Arrow::Fill(const Handle(Prs3d_Presentation)& /*aPresentation*/,
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const gp_Pnt& /*aLocation*/,
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const gp_Dir& /*aDirection*/,
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const Quantity_PlaneAngle /*anAngle*/,
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const Quantity_Length /*aLength*/)
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{
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}
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