axisalignedbox.cpp

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// © Copyright 2010 - 2014 BlackTopp Studios Inc.
/* This file is part of The Mezzanine Engine.

    The Mezzanine Engine is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    The Mezzanine Engine 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 General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with The Mezzanine Engine.  If not, see <http://www.gnu.org/licenses/>.
*/
/* The original authors have included a copy of the license specified above in the
   'Docs' folder. See 'gpl.txt'
*/
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   Joseph Toppi - toppij@gmail.com
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*/
#ifndef _axisalignedbox_cpp
#define _axisalignedbox_cpp

/// @file
/// @brief This file contains the implementation for the AxisAlignedBox class for representing AABB's of objects in the world.

#include "axisalignedbox.h"
#include "mathtool.h"
#include "plane.h"
#include "ray.h"
#include "exception.h"
#include "serialization.h"

#include <Ogre.h>

#include <algorithm>

namespace Mezzanine
{
    AxisAlignedBox::AxisAlignedBox()
        {  }

    AxisAlignedBox::AxisAlignedBox(const AxisAlignedBox& Other) :
        MinExt(Other.MinExt),
        MaxExt(Other.MaxExt)
        {  }

    AxisAlignedBox::AxisAlignedBox(const Vector3& Min, const Vector3& Max) :
        MinExt(Min),
        MaxExt(Max)
        {  }

    AxisAlignedBox::AxisAlignedBox(const Ogre::AxisAlignedBox& InternalAABB)
        { this->ExtractOgreAABB(InternalAABB); }

    AxisAlignedBox::~AxisAlignedBox()
        {  }

    ///////////////////////////////////////////////////////////////////////////////
    // Utility

    Boolean AxisAlignedBox::IsZero() const
    {
        return ( this->MinExt.X >= this->MaxExt.X &&
                 this->MinExt.Y >= this->MaxExt.Y &&
                 this->MinExt.Z >= this->MaxExt.Z );
    }

    Real AxisAlignedBox::GetVolume() const
    {
        Vector3 Diff = this->MaxExt - this->MinExt;
        return ( Diff.X * Diff.Y * Diff.Z );
    }

    AxisAlignedBox AxisAlignedBox::GetOverlap(const AxisAlignedBox& Other) const
    {
        Vector3 NewMin = this->MinExt, NewMax = this->MaxExt;
        NewMin.Ceil(Other.MinExt);
        NewMax.Floor(Other.MaxExt);

        if( NewMin.X < NewMax.X && NewMin.Y < NewMax.Y && NewMin.Z < NewMax.Z ) {
            return AxisAlignedBox(NewMin,NewMax);
        }else{
            return AxisAlignedBox();
        }
    }

    void AxisAlignedBox::Expand(const Vector3& Point)
    {
        this->MinExt.Floor(Point);
        this->MaxExt.Ceil(Point);
    }

    void AxisAlignedBox::Expand(const AxisAlignedBox& Other)
    {
        this->MinExt.Floor(Other.MinExt);
        this->MaxExt.Ceil(Other.MaxExt);
    }

    Boolean AxisAlignedBox::IsInside(const Vector3& ToCheck) const
        { return MathTools::IsInside(*this,ToCheck); }

    Boolean AxisAlignedBox::IsOverlapping(const Sphere& ToCheck) const
        { return MathTools::Overlap(*this,ToCheck); }

    Boolean AxisAlignedBox::IsOverlapping(const AxisAlignedBox& ToCheck) const
        { return MathTools::Overlap(*this,ToCheck); }

    Boolean AxisAlignedBox::IsOverlapping(const Plane& ToCheck) const
        { return MathTools::Overlap(*this,ToCheck); }

    AxisAlignedBox::RayTestResult AxisAlignedBox::Intersects(const Ray& ToCheck) const
        { return MathTools::Intersects(*this,ToCheck); }

    ///////////////////////////////////////////////////////////////////////////////
    // Extents query

    void AxisAlignedBox::SetExtents(const Vector3& Min, const Vector3& Max)
        { this->MinExt = Min;  this->MaxExt = Max; }

    Vector3 AxisAlignedBox::GetSize() const
        { return ( this->MaxExt - this->MinExt ); }

    Vector3 AxisAlignedBox::GetHalfSize() const
        { return ( this->GetSize() * 0.5 ); }

    Vector3 AxisAlignedBox::GetCenter() const
        { return ( this->MaxExt + this->MinExt ) * 0.5; }

    Vector3 AxisAlignedBox::GetCorner(const AxisAlignedBox::AxisExtent XEx, const AxisAlignedBox::AxisExtent YEx, const AxisAlignedBox::AxisExtent ZEx) const
    {
        return Vector3( ( XEx == AE_Min ? this->MinExt.X : this->MaxExt.X ),
                        ( YEx == AE_Min ? this->MinExt.Y : this->MaxExt.Y ),
                        ( ZEx == AE_Min ? this->MinExt.Z : this->MaxExt.Z ) );
    }

    ///////////////////////////////////////////////////////////////////////////////
    // Conversion Methods

    void AxisAlignedBox::ExtractOgreAABB(const Ogre::AxisAlignedBox& InternalAABB)
        { this->MinExt.ExtractOgreVector3( InternalAABB.getMinimum() );  this->MaxExt.ExtractOgreVector3( InternalAABB.getMaximum() ); }

    Ogre::AxisAlignedBox AxisAlignedBox::GetOgreAABB() const
        { return Ogre::AxisAlignedBox(this->MinExt.GetOgreVector3(),this->MaxExt.GetOgreVector3()); }

    ///////////////////////////////////////////////////////////////////////////////
    // Serialization

    void AxisAlignedBox::ProtoSerialize(XML::Node& ParentNode) const
    {
        XML::Node SelfRoot = ParentNode.AppendChild( AxisAlignedBox::GetSerializableName() );

        if( SelfRoot.AppendAttribute("Version").SetValue("1") )
        {
            XML::Node MinimumNode = SelfRoot.AppendChild("MinExt");
            this->MinExt.ProtoSerialize( MinimumNode );

            XML::Node MaximumNode = SelfRoot.AppendChild("MaxExt");
            this->MaxExt.ProtoSerialize( MaximumNode );

            return;
        }else{
            SerializeError("Create XML Attribute Values",AxisAlignedBox::GetSerializableName(),true);
        }
    }

    void AxisAlignedBox::ProtoDeSerialize(const XML::Node& SelfRoot)
    {
        if( String(SelfRoot.Name()) == AxisAlignedBox::GetSerializableName() ) {
            if(SelfRoot.GetAttribute("Version").AsInt() == 1) {
                // Get the properties that need their own nodes
                XML::Node MinimumNode = SelfRoot.GetChild("MinExt").GetFirstChild();
                if( !MinimumNode.Empty() )
                    this->MinExt.ProtoDeSerialize(MinimumNode);

                XML::Node MaximumNode = SelfRoot.GetChild("MaxExt").GetFirstChild();
                if( !MaximumNode.Empty() )
                    this->MaxExt.ProtoDeSerialize(MaximumNode);
            }else{
                MEZZ_EXCEPTION(Exception::INVALID_VERSION_EXCEPTION,"Incompatible XML Version for " + AxisAlignedBox::GetSerializableName() + ": Not Version 1.");
            }
        }else{
            MEZZ_EXCEPTION(Exception::II_IDENTITY_NOT_FOUND_EXCEPTION,AxisAlignedBox::GetSerializableName() + " was not found in the provided XML node, which was expected.");
        }
    }

    String AxisAlignedBox::GetSerializableName()
    {
        return "AxisAlignedBox";
    }

    ///////////////////////////////////////////////////////////////////////////////
    // Operators

    void AxisAlignedBox::operator=(const AxisAlignedBox& Other)
        { this->MinExt = Other.MinExt;  this->MaxExt = Other.MaxExt; }

    void AxisAlignedBox::operator=(const Ogre::AxisAlignedBox& InternalAABB)
        { this->ExtractOgreAABB(InternalAABB); }

    Boolean AxisAlignedBox::operator>(const AxisAlignedBox& Other) const
        { return ( this->GetVolume() > Other.GetVolume() ); }

    Boolean AxisAlignedBox::operator<(const AxisAlignedBox& Other) const
        { return ( this->GetVolume() < Other.GetVolume() ); }

    Boolean AxisAlignedBox::operator>=(const AxisAlignedBox& Other) const
        { return ( this->GetVolume() >= Other.GetVolume() ); }

    Boolean AxisAlignedBox::operator<=(const AxisAlignedBox& Other) const
        { return ( this->GetVolume() <= Other.GetVolume() ); }

    Boolean AxisAlignedBox::operator==(const AxisAlignedBox& Other) const
        { return ( this->MinExt == Other.MinExt && this->MaxExt == Other.MaxExt ); }

    Boolean AxisAlignedBox::operator!=(const AxisAlignedBox& Other) const
        { return ( this->MinExt != Other.MinExt || this->MaxExt != Other.MaxExt ); }
}//Mezzanine

#endif