khanat-opennel-code/code/nel/src/3d/vegetable_clip_block.cpp

// 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/>.

#include "std3d.h"

#include "nel/3d/vegetable_clip_block.h"


namespace NL3D
{


// ***************************************************************************
CVegetableClipBlock::CVegetableClipBlock()
{
	_Empty= true;
	_RenderNext= NULL;
	_NumIgs= 0;
}


// ***************************************************************************
void			CVegetableClipBlock::extendBBoxOnly(const CVector &vec)
{
	if( !_BBox.include(vec) )
	{
		_BBox.extend(vec);
	}
}


// ***************************************************************************
void			CVegetableClipBlock::updateSphere()
{
	_BSphere.Center= _BBox.getCenter();
	_BSphere.Radius= _BBox.getRadius();
}

// ***************************************************************************
void			CVegetableClipBlock::extendSphere(const CVector &vec)
{
	if(_Empty)
	{
		_Empty= false;
		_BBox.setCenter(vec);
		_BBox.setHalfSize(CVector::Null);
		_BSphere.Center= vec;
		_BSphere.Radius= 0;
	}
	else
	{
		extendBBoxOnly(vec);
		updateSphere();
	}

}


// ***************************************************************************
bool			CVegetableClipBlock::clip(const std::vector<CPlane>	&pyramid)
{
	if(_Empty)
		return false;

	for(uint i=0;i<pyramid.size();i++)
	{
		// If entirely out.
		if(!_BSphere.clipBack( pyramid[i] ))
		{
			return false;
		}
	}

	return true;
}



} // NL3D