khanat-code-old/code/snowballs2/server/position/src/physics.cpp

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2010-05-07 09:06:20 +00:00
// NeL - MMORPG Framework <http://dev.ryzom.com/projects/nel/>
// Copyright (C) 2010 Winch Gate Property Limited
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero 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 Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
2010-05-06 00:08:41 +00:00
//
// Includes
//
#include "physics.h"
//
// Namespaces
//
using namespace std;
using namespace NLMISC;
CVector CTrajectory::eval(NLMISC::TTime t) const
{
float ft = (float)(t-_StartTime)/(float)(_StopTime-_StartTime);
ft = min(ft, 1.0f);
CVector res = _EndPosition*ft + _StartPosition*(1.0f-ft);
res.z += 0.3f*_Distance*_Distance/90.0f*(float)sin(Pi*ft);
return res;
}
CVector CTrajectory::evalSpeed(NLMISC::TTime t) const
{
float ft = (float)(t-_StartTime)/(float)(_StopTime-_StartTime);
ft = min(ft, 1.0f);
CVector res = (_EndPosition-_StartPosition).normed()*_Speed;
res.z += 0.3f*_Distance*_Distance/90.0f*(float)Pi*(float)cos(Pi*ft);
return res;
}