wall.h

/* Copyright (c) 2006-2011, Stefan Eilemann <eile@equalizergraphics.com>
 *                    2012, Daniel Nachbaur <danielnachbaur@gmail.com>
 *
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License version 2.1 as published
 * by the Free Software Foundation.
 *
 * 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.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#ifndef EQFABRIC_WALL_H
#define EQFABRIC_WALL_H

#include <eq/fabric/api.h>
#include <eq/fabric/types.h>
#include <iostream>

namespace eq
{
namespace fabric
{
    class Projection;

    class Wall
    {
    public:
        EQFABRIC_API Wall();

        EQFABRIC_API Wall( const Vector3f& bottomLeft,
                           const Vector3f& bottomRight,
                           const Vector3f& topLeft );

        EQFABRIC_API void resizeHorizontal( const float ratio );

        EQFABRIC_API void resizeVertical( const float ratio );

        EQFABRIC_API void resizeLeft( const float ratio );

        EQFABRIC_API void resizeRight( const float ratio );

        EQFABRIC_API void resizeTop( const float ratio );

        EQFABRIC_API void resizeBottom( const float ratio );

        EQFABRIC_API void resizeHorizontalToAR( const float aspectRatio );

        EQFABRIC_API void moveFocus( const Vector3f& eye, const float ratio );

        EQFABRIC_API void apply( const Viewport& viewport);

        EQFABRIC_API void scale( const float ratio );

        EQFABRIC_API Wall& operator = ( const Projection& projection );

        EQFABRIC_API Wall& operator = ( const Matrix4f& xfm );

        float getWidth() const { return (bottomRight - bottomLeft).length(); }

        float getHeight() const { return (topLeft - bottomLeft).length(); }

        EQFABRIC_API bool operator == ( const Wall& rhs ) const;

        EQFABRIC_API bool operator != ( const Wall& rhs ) const;

        Vector3f getU() const { return bottomRight - bottomLeft; }

        Vector3f getV() const { return topLeft - bottomLeft; }

        Vector3f getW() const { return getU().cross( getV( )); }

        Vector3f bottomLeft;  
        Vector3f bottomRight; 
        Vector3f topLeft;     

        enum Type
        {
            TYPE_FIXED, 
            TYPE_HMD    
        };
        Type type; 
    };

    EQFABRIC_API std::ostream& operator << ( std::ostream&, const Wall& );
    EQFABRIC_API std::ostream& operator << ( std::ostream&, const Wall::Type& );
}
}

namespace lunchbox
{
template<> inline void byteswap( eq::fabric::Wall::Type& value )
{
    byteswap( reinterpret_cast< uint32_t& >( value ));
}

template<> inline void byteswap( eq::fabric::Wall& value )
{
    byteswap( value.bottomLeft );
    byteswap( value.bottomRight );
    byteswap( value.topLeft );
    byteswap( value.type );
}
}
#endif // EQFABRIC_WALL_H