Rect.hpp

/******************************************************************************
 
  nomlib - C++11 cross-platform game engine
 
Copyright (c) 2013, 2014 Jeffrey Carpenter <i8degrees@gmail.com>
All rights reserved.
 
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. Redistributions in binary form must reproduce the above copyright notice,
   this list of conditions and the following disclaimer in the documentation
   and/or other materials provided with the distribution.
 
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
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******************************************************************************/
#ifndef NOMLIB_MATH_RECT_HEADERS
#define NOMLIB_MATH_RECT_HEADERS
 
#include "nomlib/config.hpp"
#include "nomlib/math/Point2.hpp"
#include "nomlib/math/Size2.hpp"
#include "nomlib/ptree/Value.hpp"
 
namespace nom {

const std::string RECT_DELIMITER = ", ";

template<typename T>
struct Rect
{
  Rect ( void ) :
    x ( -1 ),
    y ( -1 ),
    w ( -1 ),
    h ( -1 )
  {
    //NOM_LOG_TRACE(NOM);
  }

  ~Rect ( void )
  {
    //NOM_LOG_TRACE(NOM);
  }

  Rect ( T left, T top, T right, T bottom ) :
    x ( left ),
    y ( top ),
    w ( right ),
    h ( bottom )
  {
    //NOM_LOG_TRACE(NOM);
  }

  Rect ( const Point2<T>& pos, const Size2<T>& size )  :
    x ( pos.x ),
    y ( pos.y ),
    w ( size.w ),
    h ( size.h )
  {
    //NOM_LOG_TRACE(NOM);
  }

  template <typename U>
  explicit Rect ( const Rect<U>& copy ) :
    x { static_cast<T> ( copy.x ) },
    y { static_cast<T> ( copy.y ) },
    w { static_cast<T> ( copy.w ) },
    h { static_cast<T> ( copy.h ) }
  {
    //NOM_LOG_TRACE(NOM);
  }

  bool contains ( T x, T y ) const
  {
    return  (
              ( x >= this->x && x <= this->x + this->w  ) &&
              ( y >= this->y && y <= this->y + this->h )
            );
  }

  bool contains ( const Point2<T>& pos ) const
  {
    return this->contains ( pos.x, pos.y );
  }

  bool intersects ( const Rect<T>& rectangle ) const
  {
    T leftA, leftB = 0;
    T rightA, rightB = 0;
    T topA, topB = 0;
    T bottomA, bottomB = 0;
 
    // Calculate sides of RectA
    leftA = this->x;
    rightA = leftA + this->w;
    topA = this->y;
    bottomA = topA + this->h;
 
    // Calculate sides of RectB
    leftB = rectangle.x;
    rightB = leftB + rectangle.w;
    topB = rectangle.y;
    bottomB = topB + rectangle.h;
 
    if ( bottomA <= topB ) return false; // No collision
    if ( topA >= bottomB ) return false; // No collision
    if ( rightA <= leftB ) return false; // No collision
    if ( leftA >= rightB ) return false; // No collision
 
    return true; // Collision!
  }

  const Object serialize( void ) const
  {
    Object object;
 
    object["x"] = this->x;
    object["y"] = this->y;
    object["width"] = this->w;
    object["height"] = this->h;
 
    return object;
  }

  const Point2i position( void ) const
  {
    return Point2i( NOM_SCAST( T, this->x ), NOM_SCAST( T, this->y ) );
  }

  const Size2i size( void ) const
  {
    return Size2i( NOM_SCAST( T, this->w ), NOM_SCAST( T, this->h ) );
  }
 
  const T& left() const
  {
    return this->x;
  }
 
  const T& top() const
  {
    return this->y;
  }
 
  const T& right() const
  {
    return(this->x + this->w);
  }
 
  const T& bottom() const
  {
    return(this->y + this->h);
  }
 
  template <typename U>
  void set_position(const Point2<U>& pos)
  {
    this->x = pos.x;
    this->y = pos.y;
  }
 
  template <typename U>
  void set_size(const Size2<U>& dims)
  {
    this->w = dims.w;
    this->h = dims.h;
  }

  static const Rect null;

  static const Rect zero;

  T x;
 
  T y;
 
  T w;

  T h;
};

template <typename T>
inline std::ostream& operator <<( std::ostream& os, const Rect<T>& rect )
{
  os
  << rect.x
  << RECT_DELIMITER
  << rect.y
  << RECT_DELIMITER
  << rect.w
  << RECT_DELIMITER
  << rect.h;
  return os;
}

template <typename T>
inline bool operator == ( const Rect<T>& lhs, const Rect<T>& rhs )
{
  return  ( lhs.x == rhs.x )  &&  ( lhs.w == rhs.w )
                              &&
          ( lhs.y == rhs.y )  &&  ( lhs.h == rhs.h );
}

template <typename T>
inline bool operator != ( const Rect<T>& lhs, const Rect<T>& rhs )
{
  return ! ( lhs == rhs );
}

template <typename T>
inline Rect<T> operator + ( const Rect<T>& lhs, const Rect<T>& rhs )
{
  return Rect<T>  ( lhs.x + rhs.x,
                    lhs.y + rhs.y,
                    lhs.w + rhs.w,
                    lhs.h + rhs.h
                  );
}

template <typename T>
inline Rect<T> operator +(int lhs, const Rect<T>& rhs)
{
  return Rect<T>(lhs + rhs.x, lhs + rhs.y, lhs + rhs.w, lhs + rhs.h);
}

template <typename T>
inline Rect<T> operator +(const Rect<T>& lhs, int rhs)
{
  return Rect<T>(lhs.x + rhs, lhs.y + rhs, lhs.w + rhs, lhs.h + rhs);
}

template <typename T>
inline Rect<T> operator ++ ( const Rect<T>& rhs )
{
  return Rect<T>  ( rhs.x + 1,
                    rhs.y + 1,
                    rhs.w + 1,
                    rhs.h + 1
                  );
}

template <typename T>
inline Rect<T> operator -( const Rect<T>& rhs )
{
  return Rect<T>  ( -rhs.x,
                    -rhs.y,
                    -rhs.w
                    -rhs.h
                  );
}

template <typename T>
inline Rect<T> operator -( const Rect<T>& lhs, const Rect<T>& rhs )
{
  return Rect<T>  ( lhs.x - rhs.x,
                    lhs.y - rhs.y,
                    lhs.w - rhs.w,
                    lhs.h - rhs.h
                  );
}

template <typename T>
inline Rect<T> operator -(int lhs, const Rect<T>& rhs)
{
  return Rect<T>(lhs - rhs.x, lhs - rhs.y, lhs - rhs.w, lhs - rhs.h);
}

template <typename T>
inline Rect<T> operator -(const Rect<T>& lhs, int rhs)
{
  return Rect<T>(lhs.x - rhs, lhs.y - rhs, lhs.w - rhs, lhs.h - rhs);
}

template <typename T>
inline Rect<T> operator -- ( const Rect<T>& rhs )
{
  return Rect<T>  ( rhs.x - 1,
                    rhs.y - 1,
                    rhs.w - 1,
                    rhs.h - 1
                  );
}

template <typename T>
inline Rect<T> operator * ( const Rect<T>& lhs, const Rect<T>& rhs )
{
  return Rect<T>  ( lhs.x * rhs.x,
                    lhs.y * rhs.y,
                    lhs.w * rhs.w,
                    lhs.h * rhs.h
                  );
}

template <typename T>
inline Rect<T> operator *(int lhs, const Rect<T>& rhs)
{
  return Rect<T>(lhs * rhs.x, lhs * rhs.y, lhs * rhs.w, lhs * rhs.h);
}

template <typename T>
inline Rect<T> operator *(const Rect<T>& lhs, int rhs)
{
  return Rect<T>  ( lhs.x * rhs,
                    lhs.y * rhs,
                    lhs.w * rhs,
                    lhs.h * rhs
                  );
}

template <typename T>
inline Rect<T> operator /( const Rect<T>& lhs, const Rect<T>& rhs )
{
  return Rect<T>  ( lhs.x / rhs.x,
                    lhs.y / rhs.y,
                    lhs.w / rhs.w,
                    lhs.h / rhs.h
                  );
}

template <typename T>
inline Rect<T> operator /(int lhs, const Rect<T>& rhs)
{
  return Rect<T>  ( lhs / rhs.x,
                    lhs / rhs.y,
                    lhs / rhs.w,
                    lhs / rhs.h
                  );
}

template <typename T>
inline Rect<T> operator /(const Rect<T>& lhs, int rhs)
{
  return Rect<T>  ( lhs.x / rhs,
                    lhs.y / rhs,
                    lhs.w / rhs,
                    lhs.h / rhs
                  );
}

template <typename T>
inline Rect<T>& operator +=( Rect<T>& lhs, const Rect<T>& rhs )
{
  lhs.x += rhs.x;
  lhs.y += rhs.y;
  lhs.w += rhs.w;
  lhs.h += rhs.h;
 
  return lhs;
}

template <typename T>
inline Rect<T>& operator +=(int lhs, const Rect<T>& rhs)
{
  lhs += rhs.x;
  lhs += rhs.y;
  lhs += rhs.w;
  lhs += rhs.h;
 
  return lhs;
}

template <typename T>
inline Rect<T>& operator +=(Rect<T>& lhs, int rhs)
{
  lhs.x += rhs;
  lhs.y += rhs;
  lhs.w += rhs;
  lhs.h += rhs;
 
  return lhs;
}

template <typename T>
inline Rect<T>& operator -=( Rect<T>& lhs, const Rect<T>& rhs )
{
  lhs.x -= rhs.x;
  lhs.y -= rhs.y;
  lhs.w -= rhs.w;
  lhs.h -= rhs.h;
 
  return lhs;
}

template <typename T>
inline Rect<T>& operator -=(int lhs, const Rect<T>& rhs)
{
  lhs -= rhs.x;
  lhs -= rhs.y;
  lhs -= rhs.w;
  lhs -= rhs.h;
 
  return lhs;
}

template <typename T>
inline Rect<T>& operator -=(Rect<T>& lhs, int rhs)
{
  lhs.x -= rhs;
  lhs.y -= rhs;
  lhs.w -= rhs;
  lhs.h -= rhs;
 
  return lhs;
}

template <typename T>
inline Rect<T>& operator *=( Rect<T>& lhs, const Rect<T>& rhs )
{
  lhs.x *= rhs.x;
  lhs.y *= rhs.y;
  lhs.w *= rhs.w;
  lhs.h *= rhs.h;
 
  return lhs;
}

template <typename T>
inline Rect<T>& operator *=(int lhs, const Rect<T>& rhs)
{
  lhs *= rhs.x;
  lhs *= rhs.y;
  lhs *= rhs.w;
  lhs *= rhs.h;
 
  return lhs;
}

template <typename T>
inline Rect<T>& operator *=(Rect<T>& lhs, int rhs)
{
  lhs.x *= rhs;
  lhs.y *= rhs;
  lhs.w *= rhs;
  lhs.h *= rhs;
 
  return lhs;
}

template <typename T>
inline Rect<T>& operator /=( Rect<T>& lhs, const Rect<T>& rhs )
{
  lhs.x /= rhs.x;
  lhs.y /= rhs.y;
  lhs.w /= rhs.w;
  lhs.h /= rhs.h;
 
  return lhs;
}

template <typename T>
inline Rect<T>& operator /=(int lhs, const Rect<T>& rhs)
{
  lhs /= rhs.x;
  lhs /= rhs.y;
  lhs /= rhs.w;
  lhs /= rhs.h;
 
  return lhs;
}

template <typename T>
inline Rect<T>& operator /=(Rect<T>& lhs, int rhs)
{
  lhs.x /= rhs;
  lhs.y /= rhs;
  lhs.w /= rhs;
  lhs.h /= rhs;
 
  return lhs;
}

template <typename T>
inline bool operator <( const Rect<T> lhs, const Rect<T>& rhs )
{
  return  ( lhs.x < rhs.x ) &&  ( lhs.y < rhs.y )
                            &&
          ( lhs.w < rhs.w ) &&  ( lhs.h < rhs.h );
}

template <typename T>
inline bool operator >( const Rect<T>& lhs, const Rect<T>& rhs )
{
  return  ( rhs.x < lhs.x )   &&  ( rhs.y < lhs.y )
                              &&
          ( rhs.w < lhs.w )   &&  ( rhs.h < lhs.h );
}

template <typename T>
inline bool operator <=( const Rect<T>& lhs, const Rect<T>& rhs )
{
  return  ( lhs.x <= rhs.x )  &&  ( lhs.y <= rhs.y )
                              &&
          ( lhs.w <= rhs.w )  &&  ( lhs.h <= rhs.h );
}

template <typename T>
inline bool operator >=( const Rect<T>& lhs, const Rect<T>& rhs )
{
  return  ( rhs.x <= lhs.x )  &&  ( rhs.y <= lhs.y )
                              &&
          ( rhs.w <= lhs.w )  &&  ( rhs.h <= lhs.h );
}

typedef Rect<int> IntRect;

typedef Rect<float> FloatRect;

typedef Rect<double> DoubleRect;
 
} // namespace nom
 
#endif // include guard defined