---

Ring.cpp

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/*
    TEDDY - General graphics application library
    Copyright (C) 1999-2002  Timo Suoranta
    tksuoran@cc.helsinki.fi

    This library 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 2.1 of the License, or (at your option) any later version.

    This library 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 library; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

    $Id: Ring.cpp,v 1.4 2002/01/11 14:35:03 tksuoran Exp $
*/


#include "Teddy/Maths/Vector.h"
#include "Teddy/Models/Ring.h"
#include "Teddy/Models/QuadStrip.h"
#include "Teddy/Models/Vertex.h"
#include "Teddy/SysSupport/StdMaths.h"
using namespace Teddy::SysSupport;


namespace Teddy  {
namespace Models {


Ring::Ring(
    const std::string &name,
    const double       inner_radius,
    const double       outer_radius,
    const int          slices )
:
Model( name )
{
    QuadStrip *qs = new QuadStrip();
    for( int i=0; i<=slices; i++ ){
        double theta = i*M_2_PI/slices;
        double slice = 1.0 - (double)(i)/(double)(slices);
        Vertex *v1 = new Vertex( inner_radius * cos(theta), 0, inner_radius * sin(theta) );
        v1->setNormal (  0.0f, 1.0f, 0.0f );
        v1->setTexture( slice, 0.0f, 0.0f );
        Vertex *v2 = new Vertex( outer_radius * cos(theta), 0, outer_radius * sin(theta) );
        v1->setNormal (  0.0f, 1.0f, 0.0f );
        v1->setTexture( slice, 1.0f, 0.0f );
        qs->add( v1 );
        qs->add( v2 );
    }
    add( qs );
    setClipRadius( outer_radius );
}


};  //  namespace Models
};  //  namespace Teddy