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78 lines
2.2 KiB
C++
Executable File
78 lines
2.2 KiB
C++
Executable File
// File : Adaptor3d_HSurfaceTool.cxx
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// Created : Wed Jui 7 18:00:00 1993
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// Author : Laurent BUCHARD
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// Copyright : Matra Datavision 1993
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#include <Adaptor3d_HSurfaceTool.ixx>
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Standard_Integer Adaptor3d_HSurfaceTool::NbSamplesU(const Handle(Adaptor3d_HSurface)& S)
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{
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switch (S->GetType())
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{
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case GeomAbs_Plane: return 2;
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case GeomAbs_BezierSurface: return (3 + S->NbUPoles());
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case GeomAbs_BSplineSurface:
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{
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const Standard_Integer nbs = S->NbUKnots() * S->UDegree();
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return (nbs < 2 ? 2 : nbs);
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}
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case GeomAbs_Torus: return 20;
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}
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return 10;
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}
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Standard_Integer Adaptor3d_HSurfaceTool::NbSamplesV(const Handle(Adaptor3d_HSurface)& S)
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{
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switch (S->GetType())
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{
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case GeomAbs_Plane: return 2;
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case GeomAbs_BezierSurface: return (3 + S->NbVPoles());
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case GeomAbs_BSplineSurface:
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{
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const Standard_Integer nbs = S->NbVKnots() * S->VDegree();
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return (nbs < 2 ? 2 : nbs);
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}
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case GeomAbs_Cylinder:
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case GeomAbs_Cone:
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case GeomAbs_Sphere:
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case GeomAbs_Torus:
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case GeomAbs_SurfaceOfRevolution:
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case GeomAbs_SurfaceOfExtrusion: return 15;
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}
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return 10;
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}
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Standard_Integer Adaptor3d_HSurfaceTool::NbSamplesU(const Handle(Adaptor3d_HSurface)& S,
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const Standard_Real u1,
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const Standard_Real u2)
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{
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const Standard_Integer nbs = NbSamplesU(S);
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Standard_Integer n = nbs;
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if(nbs>10)
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{
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const Standard_Real uf = FirstUParameter(S);
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const Standard_Real ul = LastUParameter(S);
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n *= (Standard_Integer)((u2-u1)/(ul-uf));
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if (n>nbs || n>50) n = nbs;
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if (n<5) n = 5;
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}
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return n;
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}
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Standard_Integer Adaptor3d_HSurfaceTool::NbSamplesV(const Handle(Adaptor3d_HSurface)& S,
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const Standard_Real v1,
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const Standard_Real v2)
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{
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const Standard_Integer nbs = NbSamplesV(S);
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Standard_Integer n = nbs;
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if(nbs>10)
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{
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const Standard_Real vf = FirstVParameter(S);
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const Standard_Real vl = LastVParameter(S);
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n *= (Standard_Integer)((v2-v1)/(vl-vf));
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if (n>nbs || n>50) n = nbs;
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if (n<5) n = 5;
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}
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return n;
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}
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