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// K-3D
// Copyright (c) 1995-2004, Timothy M. Shead
//
// Contact: tshead@k-3d.com
//
// 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
/** \file
\author Tim Shead (tshead@k-3d.com)
*/
#include "idocument.h"
#include "iobject_collection.h"
#include "iselectable.h"
#include "isnap_target.h"
#include "snap.h"
namespace k3d
{
bool snap(idocument& Document, const double MaxDistance, const vector3 InputCoordinates, vector3& SnapCoordinates, std::string& SnapDescription)
{
// Keep track of the closest snap coordinate as we go ...
double distance = MaxDistance * MaxDistance;
bool result = false;
// For each object in the document ...
const iobject_collection::objects_t objects(Document.objects().collection());
for(iobject_collection::objects_t::const_iterator i = objects.begin(); i != objects.end(); ++i)
{
iobject& object = **i;
// Skip objects that aren't snap targets ...
isnap_target* const snap_target = dynamic_cast<isnap_target*>(&object);
if(!snap_target)
continue;
/*
// Skip hidden objects ...
if(!object.state().QueryState(k3dIState::VISIBLE))
continue;
// Skip selected objects ...
if(!object.selectable().is_selected())
continue;
*/
vector3 snap_coordinates;
std::string snap_description;
snap_target->snap(InputCoordinates, snap_coordinates, snap_description);
if((snap_coordinates - InputCoordinates).Length2() < distance)
{
SnapCoordinates = snap_coordinates;
SnapDescription = snap_description;
distance = (snap_coordinates - InputCoordinates).Length2();
result = true;
}
}
return result;
}
} // namespace k3d
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