$#include "Rect.h"

/// Two-dimensional bounding rectangle.
class Rect
{
public:
    /// Construct an undefined rect.
    Rect() :
        min_(Vector2::ZERO),
        max_(Vector2::ZERO),
        defined_(false)
    {
    }
    
    /// Copy-construct from another rect.
    Rect(const Rect& rect) :
        min_(rect.min_),
        max_(rect.max_),
        defined_(rect.defined_)
    {
    }
    
    /// Construct from minimum and maximum vectors.
    Rect(const Vector2& min, const Vector2& max) :
        min_(min),
        max_(max),
        defined_(true)
    {
    }
    
    /// Construct from coordinates.
    Rect(float left, float top, float right, float bottom) :
        min_(left, top),
        max_(right, bottom),
        defined_(true)
    {
    }
    
    /// Construct from a Vector4.
    Rect(const Vector4& vector) :
        min_(vector.x_, vector.y_),
        max_(vector.z_, vector.w_),
        defined_(true)
    {
    }

    /// Test for equality with another rect.
    bool operator == (const Rect& rhs) const { return min_ == rhs.min_ && max_ == rhs.max_; }

    /// Define from another rect.
    void Define(const Rect& rect)
    {
        min_ = rect.min_;
        max_ = rect.max_;
        defined_ = true;
    }
    
    /// Define from minimum and maximum vectors.
    void Define(const Vector2& min, const Vector2& max)
    {
        min_ = min;
        max_ = max;
        defined_ = true;
    }
    
    /// Define from a point.
    void Define(const Vector2& point)
    {
        min_ = max_ = point;
        defined_ = true;
    }
    
    /// Merge a point.
    void Merge(const Vector2& point)
    {
        if (!defined_)
        {
            min_ = max_ = point;
            defined_ = true;
        }
        
        if (point.x_ < min_.x_)
            min_.x_ = point.x_;
        if (point.x_ > max_.x_)
            max_.x_ = point.x_;
        if (point.y_ < min_.y_)
            min_.y_ = point.y_;
        if (point.y_ > max_.y_)
            max_.y_ = point.y_;
    }
    
    /// Merge a rect.
    void Merge(const Rect& rect)
    {
        if (!defined_)
        {
            min_ = rect.min_;
            max_ = rect.max_;
            defined_ = true;
        }
        
        if (rect.min_.x_ < min_.x_)
            min_.x_ = rect.min_.x_;
        if (rect.min_.y_ < min_.y_)
            min_.y_ = rect.min_.y_;
        if (rect.max_.x_ > max_.x_)
            max_.x_ = rect.max_.x_;
        if (rect.max_.y_ > max_.y_)
            max_.y_ = rect.max_.y_;
    }
    
    /// Clear to undefined state.
    void Clear()
    {
        min_ = Vector2::ZERO;
        max_ = Vector2::ZERO;
        defined_ = false;
    }
    
    /// Clip with another rect.
    void Clip(const Rect& rect);
    
    /// Return center.
    Vector2 Center() const { return (max_ + min_) * 0.5f; }
    /// Return size.
    Vector2 Size() const { return max_ - min_; }
    /// Return half-size.
    Vector2 HalfSize() const { return (max_ - min_) * 0.5f; }
    /// Test for equality with another rect with epsilon.
    bool Equals(const Rect& rhs) const { return min_.Equals(rhs.min_) && max_.Equals(rhs.max_); }
    
    /// Return as a vector.
    Vector4 ToVector4() const { return Vector4(min_.x_, min_.y_, max_.x_, max_.y_); }
    /// Return as string.
    String ToString() const;

    /// Minimum vector.
    Vector2 min_ @ min;
    
    /// Maximum vector.
    Vector2 max_ @ max;
    
    /// Rect in the range (-1, -1) - (1, 1)
    static const Rect FULL;
    /// Rect in the range (0, 0) - (1, 1)
    static const Rect POSITIVE;
    /// Zero-sized rect.
    static const Rect ZERO;
};

/// Two-dimensional bounding rectangle with integer values.
class IntRect
{
public:
    /// Construct an undefined rect.
    IntRect();
    
    /// Construct from coordinates.
    IntRect(int left, int top, int right, int bottom);
    
    /// Test for equality with another rect.
    bool operator == (const IntRect& rhs) const;
    
    /// Return size.
    IntVector2 Size() const;
    
    /// Return width.
    int Width() const;
    
    /// Return height.
    int Height() const;
    
    /// Left coordinate.
    int left_ @ left;
    
    /// Top coordinate.
    int top_ @ top;
    
    /// Right coordinate.
    int right_ @ right;
    
    /// Bottom coordinate.
    int bottom_ @ bottom;
    
    /// Zero-sized rect.
    static const IntRect ZERO;
};