span.h

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/*****************************************************************************
* Multiscale Universal Interface Code Coupling Library                       *
*                                                                            *
* Copyright (C) 2019 Y. H. Tang, S. Kudo, X. Bian, Z. Li, G. E. Karniadakis  *
*                                                                            *
* This software is jointly licensed under the Apache License, Version 2.0    *
* and the GNU General Public License version 3, you may use it according     *
* to either.                                                                 *
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* ** Apache License, version 2.0 **                                          *
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* http://www.apache.org/licenses/LICENSE-2.0                                 *
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* ** GNU General Public License, version 3 **                                *
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*****************************************************************************/
 
#ifndef SPAN_H_
#define SPAN_H_
 
#include "../general/util.h"
#include "../config.h"
#include "geometry.h"
#include "../storage/stream.h"
#include "../storage/stream_vector.h"
 
namespace mui {
 
template<class CONFIG>
class span {
protected:
    using container = std::vector<geometry::any_shape<CONFIG> >;
    container parts;
public:
    span() {}
 
    span operator || ( const geometry::any_shape<CONFIG> &s ) {
        parts.push_back(s);
        return *this;
    }
    void operator && ( const geometry::any_shape<CONFIG> &s ) {
        auto i = parts.begin();
        while( i != parts.end() ) {
            if ( !i->collide(s) ) i = parts.erase(i);
            else ++i;
        }
    }
    void reset() { parts.clear(); }
 
    bool collide( const geometry::any_shape<CONFIG>& other ) const {
        for( const auto& my: parts )
            if( mui::geometry::collide(my,other) ) return true;
        return false;
    }
    bool collide( const span& other ) const {
        for( const auto& r: other.parts )
            if( this->collide(r) ) return true;
        return false;
    }
 
    geometry::box<CONFIG> bbox() const {
        if( parts.empty() ) return geometry::box<CONFIG>();
        geometry::box<CONFIG> bx = parts.front().bbox();
        for( std::size_t i=1; i<parts.size(); ++i ) bx = mui::geometry::bbox(bx,parts[i]);
        return bx;
    }
 
    void serialize( ostream& stream ) const {
        stream << parts;
    }
    void deserialize( istream& stream ){
        stream >> parts;
    }
};
 
template<typename CONFIG>
ostream& operator<< ( ostream& stream, const span<CONFIG>& data )
{
    data.serialize(stream);
    return stream;
}
 
template<typename CONFIG>
istream& operator>> ( istream& stream, span<CONFIG>& data )
{
    data.deserialize(stream);
    return stream;
}
 
template<typename CONFIG>
bool collide( const span<CONFIG>& lhs, const span<CONFIG>& rhs )
{
    return lhs.collide(rhs);
}
 
template<typename CONFIG>
bool collide( const geometry::any_shape<CONFIG>& lhs, const span<CONFIG>& rhs )
{
    return rhs.collide(lhs);
}
template<typename CONFIG>
bool collide( const span<CONFIG>& lhs, const geometry::any_shape<CONFIG>& rhs )
{
    return lhs.collide(rhs);
}
 
}
 
#endif /* SPAN_H_ */