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// File: TopClass_Classifier2d.gxx
// Created: Tue Nov 17 17:47:02 1992
// Author: Remi LEQUETTE
// <rle@phylox>
// Modified: Mon May 13 15:20:43 1996
// Author: Laurent BUCHARD
// <lbr@sherlox>
//-- Reinitialisation des transitions complexes
// Modified by skv - Wed Jul 12 15:20:58 2006 OCC12627
#include <IntRes2d_IntersectionSegment.hxx>
#include <IntRes2d_IntersectionPoint.hxx>
#include <gp_Vec2d.hxx>
//=======================================================================
//function : TopClass_Classifier2d
//purpose :
//=======================================================================
TopClass_Classifier2d::TopClass_Classifier2d() :
myIsSet(Standard_False),
myFirstCompare(Standard_True),
myIsHeadOrEnd(Standard_False), // skv OCC12627
myState(TopAbs_UNKNOWN) // skv OCC12627
{
}
//=======================================================================
//function : Reset
//purpose :
//=======================================================================
void TopClass_Classifier2d::Reset(const gp_Lin2d& L,
const Standard_Real P,
const Standard_Real Tol)
{
myLin = L;
myParam = P;
myTolerance = Tol;
myState = TopAbs_UNKNOWN;
myFirstCompare = Standard_True;
myFirstTrans = Standard_True;
myClosest = 0;
myIsSet = Standard_True;
// Modified by skv - Wed Jul 12 15:20:58 2006 OCC12627 Begin
myIsHeadOrEnd = Standard_False;
// Modified by skv - Wed Jul 12 15:20:58 2006 OCC12627 End
}
//=======================================================================
//function : Compare
//purpose :
//=======================================================================
void TopClass_Classifier2d::Compare(const TheEdge& E,
const TopAbs_Orientation Or)
{
// intersect the edge and the segment
myClosest = 0;
myIntersector.Perform(myLin,myParam,myTolerance,E);
if (!myIntersector.IsDone()) return;
if ((myIntersector.NbPoints() == 0)&&
(myIntersector.NbSegments() == 0)) return;
// find the closest point
Standard_Integer iPoint, iSegment, nbPoints, nbSegments;
#ifndef DEB
const IntRes2d_IntersectionPoint *PClosest = NULL;
#else
const IntRes2d_IntersectionPoint *PClosest;
#endif
Standard_Real dMin = RealLast();
nbPoints = myIntersector.NbPoints();
for (iPoint = 1; iPoint <= nbPoints; iPoint++) {
const IntRes2d_IntersectionPoint& PInter = myIntersector.Point(iPoint);
// test for ON
if (PInter.TransitionOfFirst().PositionOnCurve() == IntRes2d_Head) {
myClosest = iPoint;
myState = TopAbs_ON;
return;
}
Standard_Real paramfirst = PInter.ParamOnFirst();
if (paramfirst < dMin) {
myClosest = iPoint;
PClosest = &PInter;
dMin = paramfirst;
}
}
// for the segments we only test the first point
nbSegments = myIntersector.NbSegments();
for (iSegment = 1; iSegment <= nbSegments; iSegment++) {
const IntRes2d_IntersectionSegment& SegInter =
myIntersector.Segment(iSegment);
const IntRes2d_IntersectionPoint& PInter = SegInter.FirstPoint();
if (PInter.TransitionOfFirst().PositionOnCurve() == IntRes2d_Head) {
myClosest = nbPoints + iSegment+ iSegment - 1;
myState = TopAbs_ON;
return;
}
Standard_Real paramfirst = PInter.ParamOnFirst();
if (paramfirst < dMin) {
myClosest = nbPoints + iSegment+iSegment - 1;
PClosest = &PInter;
dMin = paramfirst;
}
}
// if no point was found return
if (myClosest == 0) return;
// if the Edge is INTERNAL or EXTERNAL, no problem
if (Or == TopAbs_INTERNAL) {
myState = TopAbs_IN;
return;
}
else if (Or == TopAbs_EXTERNAL) {
myState = TopAbs_OUT;
return;
}
if ( ! myFirstCompare ) {
Standard_Boolean b = (dMin > myParam);
if (b) {
// dMin > myParam : le point le plus proche (dMin) trouve dans CETTE
// intersection ligne,arete n'est pas le plus proche
// de TOUS les points d'intersection avec les autres aretes (myParam).
return;
}
}
// process the closest point PClosest, found at dMin on line.
myFirstCompare = Standard_False;
if(myParam > dMin) { //-- lbr le 13 mai 96
myFirstTrans = Standard_True;
}
myParam = dMin;
const IntRes2d_Transition& T2 = PClosest->TransitionOfSecond();
// Modified by skv - Wed Jul 12 15:20:58 2006 OCC12627 Begin
// Standard_Boolean isHeadorEnd = (T2.PositionOnCurve() == IntRes2d_Head) ||
// (T2.PositionOnCurve() == IntRes2d_End);
myIsHeadOrEnd = (T2.PositionOnCurve() == IntRes2d_Head) ||
(T2.PositionOnCurve() == IntRes2d_End);
// Modified by skv - Wed Jul 12 15:20:58 2006 OCC12627 End
// transition on the segment
#ifndef DEB
TopAbs_Orientation SegTrans = TopAbs_FORWARD;
#else
TopAbs_Orientation SegTrans;
#endif
const IntRes2d_Transition& T1 = PClosest->TransitionOfFirst();
switch (T1.TransitionType()) {
case IntRes2d_In :
if (Or == TopAbs_REVERSED) SegTrans = TopAbs_REVERSED;
else SegTrans = TopAbs_FORWARD;
break;
case IntRes2d_Out :
if (Or == TopAbs_REVERSED) SegTrans = TopAbs_FORWARD;
else SegTrans = TopAbs_REVERSED;
break;
case IntRes2d_Touch :
switch (T1.Situation()) {
case IntRes2d_Inside :
if (Or == TopAbs_REVERSED) SegTrans = TopAbs_EXTERNAL;
else SegTrans = TopAbs_INTERNAL;
break;
case IntRes2d_Outside :
if (Or == TopAbs_REVERSED) SegTrans = TopAbs_INTERNAL;
else SegTrans = TopAbs_EXTERNAL;
break;
case IntRes2d_Unknown : return;
}
break;
case IntRes2d_Undecided : return;
}
// are we inside the Edge ?
// const IntRes2d_Transition& T2 = PClosest->TransitionOfSecond();
if ( ! myIsHeadOrEnd ) {
// PClosest is inside the edge
switch (SegTrans) {
case TopAbs_FORWARD :
case TopAbs_EXTERNAL :
myState = TopAbs_OUT;
break;
case TopAbs_REVERSED :
case TopAbs_INTERNAL :
myState = TopAbs_IN;
break;
}
}
else {
// PClosest is Head or End of the edge : update the complex transition
gp_Dir2d Tang2d,Norm2d;
Standard_Real Curv;
myIntersector.LocalGeometry
(E,PClosest->ParamOnSecond(),Tang2d,Norm2d,Curv);
gp_Dir Tang(Tang2d.X(),Tang2d.Y(),0.);
gp_Dir Norm(Norm2d.X(),Norm2d.Y(),0.);
if (myFirstTrans) {
gp_Dir D(myLin.Direction().X(),myLin.Direction().Y(),0.);
myTrans.Reset(D);
myFirstTrans = Standard_False;
}
TopAbs_Orientation Ort;
if (T2.PositionOnCurve() == IntRes2d_Head) Ort = TopAbs_FORWARD;
else Ort = TopAbs_REVERSED;
myTrans.Compare(RealEpsilon(), Tang, Norm, Curv, SegTrans, Ort);
myState = myTrans.StateBefore();
}
}
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