Make_Frame.hxx

// 
// Copyright (C) 2006 James M. Lawrence.  All rights reserved.
// 
// software: esve-1.0.3
// file: esve/engine/dim4/Make_Frame.hxx
// 
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 
// 1. Redistributions of source code must retain the above copyright
//    notice, this list of conditions and the following disclaimer.
// 
// 2. The origin of this software must not be misrepresented; you must
//    not claim that you wrote the original software.  If you use this
//    software in a product, an acknowledgment in the product 
//    documentation would be appreciated but is not required.
// 
// 3. Altered source versions must be plainly marked as such, and must
//    not be misrepresented as being the original software.
// 
// 4. The name of the author may not be used to endorse or promote
//    products derived from this software without specific prior written
//    permission.
// 
// THIS SOFTWARE IS PROVIDED "AS IS" WITHOUT EXPRESS OR IMPLIED WARRANTY,
// AND WITH NO CLAIM AS TO ITS SUITABILITY FOR ANY PURPOSE.  IN NO EVENT
// SHALL THE AUTHOR BE LIABLE FOR ANY CLAIM WHATSOEVER MADE IN CONNECTION
// TO THIS SOFTWARE.
// 

#ifndef esve_engine_dim4_Make_Frame_hxx
#define esve_engine_dim4_Make_Frame_hxx

#include <esve/engine/dim4/impl/Frame.hxx>
#include <esve/engine/dim4/impl/Transform.hxx>
#include <esve/message/impl/Compute_Receiver.hxx>
#include <esve/types/quat.hxx>

namespace esve { namespace engine { namespace dim4 {


template< typename T_Target, typename T_Frame = impl::Frame >
class Make_Frame
    : virtual public message::impl::Compute_Receiver,
      public T_Frame,
      public T_Target
{
private:
#if !defined(NDEBUG)
    template< class U > static void m_unused( const U & ) { }

    void m_requirements_1() const
    {
        bool r = T_Target::changed() ;
        m_unused(r) ;
    }

    void m_requirements_2()
    {
        T_Target::pretransform() ;
        T_Target::posttransform() ;

        m_requirements_2_1(T_Target::points_begin()) ;
        m_requirements_2_1(T_Target::points_end()) ;
        m_requirements_2_2(T_Target::transformed_points_begin()) ;

        engine::dim4::Frame* r = dynamic_cast<T_Frame*>(this) ;
        m_unused(r) ;
    }

    template< typename T_Points_iterator >
    void m_requirements_2_1( T_Points_iterator i )
    {
        types::quat q = *i ;
        ++i ;
    }

    template< typename T_Transformed_Points_iterator >
    void m_requirements_2_2( T_Transformed_Points_iterator i )
    {
        *i = types::quat() ;
        ++i ;
    }

    struct m_Requirements
    {
        m_Requirements()
        {
            typedef void (Make_Frame::*R1)() const ;
            typedef void (Make_Frame::*R2)() ;
            
            R1 r1 = &Make_Frame::m_requirements_1 ;
            R2 r2 = &Make_Frame::m_requirements_2 ;
            m_unused(r1) ;
            m_unused(r2) ;
        }
    } m_requirements ;
#endif // !defined(NDEBUG)

    struct Private
    {
        bool initialized ;
        impl::Transform last_world_transform ;

        Private() ;
    } ;

    Make_Frame( const Make_Frame & ) ;
    Make_Frame & operator=( const Make_Frame & ) ;

    Private m ;

public:
    Make_Frame() ;

    template< typename T_Arg >
    Make_Frame( T_Arg & ) ;

    template< typename T_Arg >
    Make_Frame( const T_Arg & ) ;

    ~Make_Frame() ;

protected:
    typedef T_Target Make_Frame_Parameter_Target ;
    typedef T_Frame Make_Frame_Parameter_Frame ;
    
    void compute() ;

    virtual void pretransform() ;

    virtual void posttransform() ;

    virtual bool changed() const ;

    virtual void apply_transform() ;
} ;

}}} // namespace esve::engine::dim4

#include <esve/engine/dim4/Make_Frame.template.cxx>

#endif

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