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// Copyright (C) 2003-2004 Dominique Devriese <devriese@kde.org>
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
// 02110-1301, USA.
#include "arc_type.h"
#include "bogus_imp.h"
#include "other_imp.h"
#include "point_imp.h"
#include "line_imp.h"
#include "locus_imp.h"
#include "../misc/common.h"
#include "../misc/calcpaths.h"
#include "../misc/goniometry.h"
#include "../kig/kig_part.h"
#include "../kig/kig_view.h"
#include "../kig/kig_commands.h"
#include <functional>
#include <algorithm>
#include <cmath>
using std::find;
#include <qstringlist.h>
static const char constructarcstartingstat[] = I18N_NOOP( "Construct an arc starting at this point" );
static const ArgsParser::spec argsspecArcBTP[] =
{
{ PointImp::stype(), constructarcstartingstat,
I18N_NOOP( "Select the start point of the new arc..." ), true },
{ PointImp::stype(), I18N_NOOP( "Construct an arc through this point" ),
I18N_NOOP( "Select a point for the new arc to go through..." ), true },
{ PointImp::stype(), I18N_NOOP( "Construct an arc ending at this point" ),
I18N_NOOP( "Select the end point of the new arc..." ), true }
};
KIG_INSTANTIATE_OBJECT_TYPE_INSTANCE( ArcBTPType )
ArcBTPType::ArcBTPType()
: ArgsParserObjectType( "ArcBTP", argsspecArcBTP, 3 )
{
}
ArcBTPType::~ArcBTPType()
{
}
const ArcBTPType* ArcBTPType::instance()
{
static const ArcBTPType t;
return &t;
}
ObjectImp* ArcBTPType::calc( const Args& args, const KigDocument& ) const
{
if ( ! margsparser.checkArgs( args, 2 ) )
return new InvalidImp;
const Coordinate a =
static_cast<const PointImp*>( args[0] )->coordinate();
const Coordinate b =
static_cast<const PointImp*>( args[1] )->coordinate();
Coordinate center;
double angle = 0.;
double startangle = 0.;
if ( args.size() == 3 )
{
Coordinate c = static_cast<const PointImp*>( args[2] )->coordinate();
center = calcCenter( a, b, c );
if ( ! center.valid() ) return new InvalidImp;
Coordinate ad = a - center;
Coordinate bd = b - center;
Coordinate cd = c - center;
double anglea = atan2( ad.y, ad.x );
double angleb = atan2( bd.y, bd.x );
double anglec = atan2( cd.y, cd.x );
// anglea should be smaller than anglec
if ( anglea > anglec )
{
double t = anglea;
anglea = anglec;
anglec = t;
};
if ( angleb > anglec || angleb < anglea )
{
startangle = anglec;
angle = 2 * M_PI + anglea - startangle;
}
else
{
startangle = anglea;
angle = anglec - anglea;
};
}
else
{
// find a center and angles that look natural..
center = (b+a)/2 + .6*(b-a).orthogonal();
Coordinate bd = b - center;
Coordinate ad = a - center;
startangle = atan2( ad.y, ad.x );
double halfangle = atan2( bd.y, bd.x ) - startangle;
if ( halfangle < - M_PI ) halfangle += 2*M_PI;
angle = 2 * halfangle;
};
double radius = ( a - center ).length();
return new ArcImp( center, radius, startangle, angle );
}
const ObjectImpType* ArcBTPType::impRequirement( const ObjectImp*, const Args& ) const
{
return PointImp::stype();
}
bool ArcBTPType::inherits( int type ) const
{
return Parent::inherits( type );
}
const ObjectImpType* ArcBTPType::resultId() const
{
return ArcImp::stype();
}
static const ArgsParser::spec argsspecArcBCPA[] =
{
{ PointImp::stype(), I18N_NOOP( "Construct an arc with this center" ),
I18N_NOOP( "Select the center of the new arc..." ), true },
{ PointImp::stype(), constructarcstartingstat,
I18N_NOOP( "Select the start point of the new arc..." ), true },
{ AngleImp::stype(), I18N_NOOP( "Construct an arc with this angle" ),
I18N_NOOP( "Select the angle of the new arc..." ), true }
};
KIG_INSTANTIATE_OBJECT_TYPE_INSTANCE( ArcBCPAType )
ArcBCPAType::ArcBCPAType()
: ArgsParserObjectType( "ArcBCPA", argsspecArcBCPA, 3 )
{
}
ArcBCPAType::~ArcBCPAType()
{
}
const ArcBCPAType* ArcBCPAType::instance()
{
static const ArcBCPAType t;
return &t;
}
ObjectImp* ArcBCPAType::calc( const Args& args, const KigDocument& ) const
{
if ( ! margsparser.checkArgs( args ) )
return new InvalidImp;
const Coordinate center = static_cast<const PointImp*>( args[0] )->coordinate();
const Coordinate p = static_cast<const PointImp*>( args[1] )->coordinate();
const AngleImp* a = static_cast<const AngleImp*>( args[2] );
const double angle = a->angle();
const Coordinate dir = p - center;
const double startangle = atan2( dir.y, dir.x );
const double radius = center.distance( p );
return new ArcImp( center, radius, startangle, angle );
}
const ObjectImpType* ArcBCPAType::impRequirement( const ObjectImp*, const Args& ) const
{
return PointImp::stype();
}
bool ArcBCPAType::inherits( int type ) const
{
return Parent::inherits( type );
}
const ObjectImpType* ArcBCPAType::resultId() const
{
return ArcImp::stype();
}
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