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//-- File : HLRBRep_BSurfaceTool.cxx
//-- Created : Wed Jui 7 18:00:00 1993
//-- Author : Laurent BUCHARD
//-- <lbr@nonox>
//-- Copyright: Matra Datavision 1993
#include <HLRBRep_BSurfaceTool.ixx>
#include <BRepAdaptor_Surface.hxx>
//=======================================================================
//function : NbSamplesU
//purpose :
//=======================================================================
Standard_Integer
HLRBRep_BSurfaceTool::NbSamplesU(const BRepAdaptor_Surface& S)
{
Standard_Integer nbs;
GeomAbs_SurfaceType typS = S.GetType();
switch(typS) {
case GeomAbs_Plane:
{
nbs = 2;
}
break;
case GeomAbs_BezierSurface:
{
nbs = 3 + S.NbUPoles();
}
break;
case GeomAbs_BSplineSurface:
{
nbs = S.NbUKnots();
nbs*= S.UDegree();
if(nbs < 2) nbs=2;
}
break;
case GeomAbs_Torus:
{
nbs = 20;
}
break;
case GeomAbs_Cylinder:
case GeomAbs_Cone:
case GeomAbs_Sphere:
case GeomAbs_SurfaceOfRevolution:
case GeomAbs_SurfaceOfExtrusion:
{
nbs = 10;
}
break;
default:
{
nbs = 10;
}
break;
}
return(nbs);
}
//=======================================================================
//function : NbSamplesV
//purpose :
//=======================================================================
Standard_Integer
HLRBRep_BSurfaceTool::NbSamplesV(const BRepAdaptor_Surface& S)
{
Standard_Integer nbs;
GeomAbs_SurfaceType typS = S.GetType();
switch(typS) {
case GeomAbs_Plane:
{
nbs = 2;
}
break;
case GeomAbs_BezierSurface:
{
nbs = 3 + S.NbVPoles();
}
break;
case GeomAbs_BSplineSurface:
{
nbs = S.NbVKnots();
nbs*= S.VDegree();
if(nbs < 2) nbs=2;
}
break;
case GeomAbs_Cylinder:
case GeomAbs_Cone:
case GeomAbs_Sphere:
case GeomAbs_Torus:
case GeomAbs_SurfaceOfRevolution:
case GeomAbs_SurfaceOfExtrusion:
{
nbs = 15;
}
break;
default:
{
nbs = 10;
}
break;
}
return(nbs);
}
//=======================================================================
//function : NbSamplesU
//purpose :
//=======================================================================
Standard_Integer
HLRBRep_BSurfaceTool::NbSamplesU(const BRepAdaptor_Surface& S,
const Standard_Real u1,
const Standard_Real u2)
{
Standard_Integer nbs = NbSamplesU(S);
Standard_Integer n = nbs;
if(nbs>10) {
Standard_Real uf = FirstUParameter(S);
Standard_Real ul = LastUParameter(S);
n*= (Standard_Integer)((u2-u1)/(uf-ul));
if(n>nbs) n = nbs;
if(n<5) n = 5;
}
return(n);
}
//=======================================================================
//function : NbSamplesV
//purpose :
//=======================================================================
Standard_Integer
HLRBRep_BSurfaceTool::NbSamplesV(const BRepAdaptor_Surface& S,
const Standard_Real v1,
const Standard_Real v2)
{
Standard_Integer nbs = NbSamplesV(S);
Standard_Integer n = nbs;
if(nbs>10) {
Standard_Real vf = FirstVParameter(S);
Standard_Real vl = LastVParameter(S);
n*= (Standard_Integer)((v2-v1)/(vf-vl));
if(n>nbs) n = nbs;
if(n<5) n = 5;
}
return(n);
}
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