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// File: MeshVS_SensitivePolyhedron.cxx
// Created: Fri Jan 21 2005
// Author: Alexander SOLOVYOV
// Copyright: Open CASCADE 2005
#include <MeshVS_SensitivePolyhedron.ixx>
#include <MeshVS_Tool.hxx>
#include <CSLib_Class2d.hxx>
#include <ElCLib.hxx>
//================================================================
// Function : Constructor MeshVS_SensitivePolyhedron
// Purpose :
//================================================================
MeshVS_SensitivePolyhedron::
MeshVS_SensitivePolyhedron( const Handle( SelectBasics_EntityOwner )& Owner,
const TColgp_Array1OfPnt& Nodes,
const Handle( MeshVS_HArray1OfSequenceOfInteger )& Topo )
: Select3D_SensitiveEntity( Owner ),
myTopo( Topo )
{
Standard_Integer low = Nodes.Lower(), up = Nodes.Upper(), i;
myNodes = new TColgp_HArray1OfPnt ( low, up );
for( i=low; i<=up; i++ )
myNodes->SetValue( i, Nodes.Value( i ) );
myNodes2d = new TColgp_HArray1OfPnt2d( low, up );
}
//================================================================
// Function : Project
// Purpose :
//================================================================
void MeshVS_SensitivePolyhedron::Project( const Handle(Select3D_Projector)& aProjector )
{
Select3D_SensitiveEntity::Project( aProjector );
if( myNodes.IsNull() || myNodes2d.IsNull() )
return;
Standard_Integer low = myNodes->Lower(),
up = myNodes->Upper();
gp_Pnt pnt;
gp_Pnt2d proj;
Standard_Boolean hasLoc = HasLocation();
myCenter = gp_XY( 0, 0 );
for( Standard_Integer i=low; i<=up; i++ )
{
pnt = myNodes->Value( i );
if( !hasLoc )
aProjector->Project( pnt, proj );
else
aProjector->Project( pnt.Transformed( Location().Transformation() ), proj );
myNodes2d->SetValue( i, proj.XY() );
myCenter += proj.XY();
}
myCenter /= ( up-low+1 );
}
//================================================================
// Function : GetConnected
// Purpose :
//================================================================
Handle( Select3D_SensitiveEntity ) MeshVS_SensitivePolyhedron::GetConnected
( const TopLoc_Location& aLocation )
{
Handle( MeshVS_SensitivePolyhedron ) NewEnt = new
MeshVS_SensitivePolyhedron( myOwnerId, myNodes->Array1(), myTopo );
if( HasLocation() )
NewEnt->SetLocation( Location() );
NewEnt->UpdateLocation( aLocation );
return NewEnt;
}
//================================================================
// Function : sort
// Purpose :
//================================================================
void sort( Standard_Real& a, Standard_Real& b )
{
if( a>b )
{
Standard_Real temp = a; a = b; b = temp;
}
}
//================================================================
// Function : Matches
// Purpose :
//================================================================
Standard_Boolean MeshVS_SensitivePolyhedron::Matches( const Standard_Real X,
const Standard_Real Y,
const Standard_Real aTol,
Standard_Real& DMin )
{
if( myNodes2d.IsNull() || myTopo.IsNull() )
return Standard_False;
Standard_Integer R1 = myTopo->Lower(),
R2 = myTopo->Upper(),
low = myNodes2d->Lower();
Standard_Real rTol = aTol*SensitivityFactor();
Standard_Boolean inside = Standard_False;
// "odd-even" algorithm: with ray parallel axis of absciss and toward positive
for( Standard_Integer i=R1; i<=R2 && !inside; i++ )
{
Standard_Integer intersect = 0, cur, next, C1 = 1, C2 = myTopo->Value( i ).Length();
Standard_Real k, b, // y=kx+b -- equation of polygon's edge
x1, y1, x2, y2, xp; // auxiliary points
for( Standard_Integer j=C1; j<=C2; j++ )
{
cur = myTopo->Value( i ).Value( j );
next = myTopo->Value( i ).Value( j<C2 ? j+1 : C1 );
x1 = myNodes2d->Value( low+cur ).X(),
y1 = myNodes2d->Value( low+cur ).Y(),
x2 = myNodes2d->Value( low+next ).X(),
y2 = myNodes2d->Value( low+next ).Y();
if( Abs( x2-x1 )<Precision::Confusion() )
{
//vertical edge!!!
sort( y1, y2 );
if( Y>=y1-rTol && Y<=y2+rTol && x1>X-rTol )
intersect++;
}
else
{
//inclined edge!!!
k = ( y2-y1 ) / ( x2-x1 );
b = y1 - k*x1;
if( Abs( k )>Precision::Confusion() )
{
xp = ( Y-b ) / k; // absciss of point of intersection
sort( x1, x2 );
if( xp>=x1 && xp<=x2 && xp>X-rTol )
intersect++;
}
}
}
inside = ( intersect%2 ) == 1;
}
if( inside )
{
return Select3D_SensitiveEntity::Matches( X, Y, aTol, DMin );
}
return Standard_False;
}
//================================================================
// Function : Matches
// Purpose :
//================================================================
Standard_Boolean MeshVS_SensitivePolyhedron::Matches( const Standard_Real XMin,
const Standard_Real YMin,
const Standard_Real XMax,
const Standard_Real YMax,
const Standard_Real aTol )
{
Standard_Real rTol = aTol*SensitivityFactor();
return myCenter.X()>=XMin-rTol && myCenter.X()<=XMax+rTol &&
myCenter.Y()>=YMin-rTol && myCenter.Y()<=YMax+rTol;
}
//================================================================
// Function : Matches
// Purpose :
//================================================================
Standard_Boolean MeshVS_SensitivePolyhedron::Matches
( const TColgp_Array1OfPnt2d& Polyline,
const Bnd_Box2d& aBox,
const Standard_Real aTol )
{
Standard_Real Umin, Vmin, Umax, Vmax;
aBox.Get( Umin, Vmin, Umax, Vmax );
CSLib_Class2d aClassifier2d( Polyline, aTol, aTol, Umin, Vmin, Umax, Vmax );
Standard_Integer res = aClassifier2d.SiDans( myCenter );
return( res==1 );
}
//================================================================
// Function : FindIntersection
// Purpose :
//================================================================
Standard_Real MeshVS_SensitivePolyhedron::FindIntersection
( const TColStd_SequenceOfInteger& NodesIndices,
const gp_Lin& EyeLine) const
{
Standard_Real val( Precision::Infinite() );
for( Standard_Integer i=1, n=NodesIndices.Length(); i<=n; i++ )
val = Min( val, ElCLib::Parameter(
EyeLine, myNodes->Value( myNodes->Lower()+NodesIndices.Value( i ) ) ) );
return val;
}
//================================================================
// Function : ComputeDepth
// Purpose :
//================================================================
Standard_Real MeshVS_SensitivePolyhedron::ComputeDepth( const gp_Lin& EyeLine ) const
{
Standard_Real val = Precision::Infinite();
if( !myTopo.IsNull() )
for( Standard_Integer i=myTopo->Lower(), up=myTopo->Upper(); i<=up; i++ )
val = Min( val, FindIntersection( myTopo->Value( i ), EyeLine ) );
return val;
}
//================================================================
// Function : ComputeSize
// Purpose :
//================================================================
/*Standard_Real MeshVS_SensitivePolyhedron::ComputeSize() const
{
Bnd_Box2d aBox;
GetBox2d( aBox );
Standard_Real aXmin, aYmin, aXmax, aYmax;
aBox.Get( aXmin, aYmin, aXmax, aYmax );
return Abs( ( aXmax-aXmin ) * ( aYmax-aYmin ) );
} */
//================================================================
// Function : Areas
// Purpose :
//================================================================
void MeshVS_SensitivePolyhedron::Areas( SelectBasics_ListOfBox2d& aResult )
{
Bnd_Box2d aBox;
GetBox2d( aBox );
aResult.Append( aBox );
}
//================================================================
// Function : GetBox2d
// Purpose :
//================================================================
void MeshVS_SensitivePolyhedron::GetBox2d( Bnd_Box2d& aBox ) const
{
aBox.SetVoid();
Standard_Real xmin = 0., ymin = 0., xmax = 0., ymax = 0., x, y;
Standard_Integer low = myNodes2d->Lower(),
up = myNodes2d->Upper();
if( !myNodes2d.IsNull() )
{
xmin = xmax = myNodes2d->Value( low ).X();
ymin = ymax = myNodes2d->Value( low ).Y();
for( Standard_Integer i=low+1; i<=up; i++ )
{
x = myNodes2d->Value( i ).X();
y = myNodes2d->Value( i ).Y();
if( x>xmax )
xmax = x;
else if( x<xmin )
xmin = x;
if( y>ymax )
ymax = y;
else if( y<ymin )
ymin = y;
}
}
aBox.Update( xmin, ymin, xmax, ymax );
}
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