---

Grid.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: Grid.cpp,v 1.4 2002/01/11 14:35:02 tksuoran Exp $
*/


#include "Teddy/Models/Grid.h"
#include "Teddy/Models/Vertex.h"
#include "Teddy/Models/Line.h"
#include "Teddy/Models/LineGeometry.h"


namespace Teddy  {
namespace Models {


Grid::Grid( const int xCount, const int zCount, const float xSize, const float zSize )
:
Model( "Grid" )
{
    Vertex *v1;
    Vertex *v2;
    Line   *l;

    setGeometry( new LineGeometry() );

    //  Boundaries
    fore   =  zCount/2*zSize;
    back   = -zCount/2*zSize;
    right  =  xCount/2*xSize;
    left   = -xCount/2*xSize;

    float r1 = xCount/2*xSize;
    float r2 = zCount/2*zSize;
    float r  = sqrt(r1*r1 + r2*r2);

    setClipRadius( r );

    //  Horizontal lines
    for( int x=-xCount/2; x<=xCount/2; x++ ){
        v1 = new Vertex( x*xSize, 0, fore   );
        v2 = new Vertex( x*xSize, 0, back   );
        l  = new Line( v1, v2 );
        add( l );
    }

    //  Vertical lines
    for( int z=-zCount/2; z<=zCount/2; z++ ){
        v1 = new Vertex( left,  0, z*zSize );
        v2 = new Vertex( right, 0, z*zSize );
        l  = new Line( v1, v2 );
        add( l );
    }
}


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