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// File : Adaptor3d_HSurfaceTool.cxx
// Created : Wed Jui 7 18:00:00 1993
// Author : Laurent BUCHARD
// Copyright : Matra Datavision 1993
#include <Adaptor3d_HSurfaceTool.ixx>
Standard_Integer Adaptor3d_HSurfaceTool::NbSamplesU(const Handle(Adaptor3d_HSurface)& S)
{
switch (S->GetType())
{
case GeomAbs_Plane: return 2;
case GeomAbs_BezierSurface: return (3 + S->NbUPoles());
case GeomAbs_BSplineSurface:
{
const Standard_Integer nbs = S->NbUKnots() * S->UDegree();
return (nbs < 2 ? 2 : nbs);
}
case GeomAbs_Torus: return 20;
default: /* Do nothing */ break;
}
return 10;
}
Standard_Integer Adaptor3d_HSurfaceTool::NbSamplesV(const Handle(Adaptor3d_HSurface)& S)
{
switch (S->GetType())
{
case GeomAbs_Plane: return 2;
case GeomAbs_BezierSurface: return (3 + S->NbVPoles());
case GeomAbs_BSplineSurface:
{
const Standard_Integer nbs = S->NbVKnots() * S->VDegree();
return (nbs < 2 ? 2 : nbs);
}
case GeomAbs_Cylinder:
case GeomAbs_Cone:
case GeomAbs_Sphere:
case GeomAbs_Torus:
case GeomAbs_SurfaceOfRevolution:
case GeomAbs_SurfaceOfExtrusion: return 15;
default: /* Do nothing */ break;
}
return 10;
}
Standard_Integer Adaptor3d_HSurfaceTool::NbSamplesU(const Handle(Adaptor3d_HSurface)& S,
const Standard_Real u1,
const Standard_Real u2)
{
const Standard_Integer nbs = NbSamplesU(S);
Standard_Integer n = nbs;
if(nbs>10)
{
const Standard_Real uf = FirstUParameter(S);
const Standard_Real ul = LastUParameter(S);
n *= (Standard_Integer)((u2-u1)/(ul-uf));
if (n>nbs || n>50) n = nbs;
if (n<5) n = 5;
}
return n;
}
Standard_Integer Adaptor3d_HSurfaceTool::NbSamplesV(const Handle(Adaptor3d_HSurface)& S,
const Standard_Real v1,
const Standard_Real v2)
{
const Standard_Integer nbs = NbSamplesV(S);
Standard_Integer n = nbs;
if(nbs>10)
{
const Standard_Real vf = FirstVParameter(S);
const Standard_Real vl = LastVParameter(S);
n *= (Standard_Integer)((v2-v1)/(vl-vf));
if (n>nbs || n>50) n = nbs;
if (n<5) n = 5;
}
return n;
}
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