/*
-----------------------------------------------------------------------------
This source file is part of OGRE
    (Object-oriented Graphics Rendering Engine)
For the latest info, see http://www.ogre3d.org/

Copyright (c) 2000-2006 Torus Knot Software Ltd
Also see acknowledgements in Readme.html

This program is free software; you can redistribute it and/or modify it under
the terms of the GNU Lesser 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 Lesser General Public License for more details.

You should have received a copy of the GNU Lesser 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, or go to
http://www.gnu.org/copyleft/lesser.txt.

You may alternatively use this source under the terms of a specific version of
the OGRE Unrestricted License provided you have obtained such a license from
Torus Knot Software Ltd.
-----------------------------------------------------------------------------
*/
#include "OgrePointEmitter.h"
#include "OgreParticle.h"



namespace Ogre {

    //-----------------------------------------------------------------------
    PointEmitter::PointEmitter(ParticleSystem* psys)
        :ParticleEmitter(psys)
    {
        mType = "Point";
        // Set up parameters
        if (createParamDictionary("PointEmitter"))
        {
            addBaseParameters();
        }
        // No custom parameters
    }
    //-----------------------------------------------------------------------
    void PointEmitter::_initParticle(Particle* pParticle)
    {
        // Very simple emitter, uses default implementations with no modification

        // Call superclass
        ParticleEmitter::_initParticle(pParticle);

        // Point emitter emits from own position
        pParticle->position = mPosition;

        // Generate complex data by reference
        genEmissionColour(pParticle->colour);
        genEmissionDirection(pParticle->direction);
        genEmissionVelocity(pParticle->direction);

        // Generate simpler data
        pParticle->timeToLive = pParticle->totalTimeToLive = genEmissionTTL();
        
    }
    //-----------------------------------------------------------------------
    unsigned short PointEmitter::_getEmissionCount(Real timeElapsed)
    {
        // Use basic constant emission 
        return genConstantEmissionCount(timeElapsed);
    }
}


