/*
	Scan Tailor - Interactive post-processing tool for scanned pages.
	Copyright (C) 2007-2009  Joseph Artsimovich <joseph_a@mail.ru>

	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 3 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, see <http://www.gnu.org/licenses/>.
*/

#include "SplineSegment.h"
#include <assert.h>

SplineSegment::SplineSegment(
	SplineVertex::Ptr const& prev, SplineVertex::Ptr const& next)
:	prev(prev),
	next(next)
{
}

SplineVertex::Ptr
SplineSegment::splitAt(QPointF const& pt)
{
	assert(isValid());
	return prev->insertAfter(pt);
}

bool
SplineSegment::isValid() const
{
	return prev && next && prev->next(SplineVertex::LOOP_IF_BRIDGED) == next;
}
