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#ifndef RECT_H
#define RECT_H
#include "Vector2.h"
#include "Runtime/Modules/ExportModules.h"
/// A rectangle.
template <typename T>
class EXPORT_COREMODULE RectT
{
public:
typedef RectT<T> RectType;
typedef float BaseType;
T x; ///< Rectangle x coordinate.
T y; ///< Rectangle y coordinate.
T width; ///< Rectangle width.
T height; ///< Rectangle height.
//DECLARE_SERIALIZE_OPTIMIZE_TRANSFER (Rectf)
inline static const char* GetTypeString ();
inline static bool IsAnimationChannel () { return false; }
inline static bool MightContainPPtr () { return false; }
inline static bool AllowTransferOptimization () { return true; }
template <class TransferFunction>
void Transfer (TransferFunction& transfer)
{
TRANSFER (x);
TRANSFER (y);
TRANSFER (width);
TRANSFER (height);
}
/// Create a empty rectangle.
RectT ()
{
Reset ();
}
/// Create a new rectangle.
RectT (T inX, T inY, T iWidth, T iHeight)
{
x = inX; width = iWidth;
y = inY; height = iHeight;
}
T GetRight() const { return x + width; }
T GetBottom() const { return y + height; }
void SetLeft(T l) { T oldXMax = GetXMax(); x = l; width = oldXMax - x; }
void SetTop(T t) { T oldYMax = GetYMax(); y = t; height = oldYMax - y; }
void SetRight(T r) { width = r - x; }
void SetBottom(T b) { height = b - y; }
T GetXMax() const { return x + width; }
T GetYMax() const { return y + height; }
/// Return true if rectangle is empty.
inline bool IsEmpty () const { return width <= 0 || height <= 0; }
inline void SetPosition(const Vector2f& position) { x = position.x; y = position.y; }
inline Vector2f GetPosition() const { return Vector2f(x, y); }
inline void SetSize(const Vector2f& size) { width = size.x; height = size.y; }
inline Vector2f GetSize() const { return Vector2f(width, height); }
/// Resets the rectangle
inline void Reset() { x = y = width = height = 0; }
/// Sets the rectangle
inline void Set(T inX, T inY, T iWidth, T iHeight)
{
x = inX; width = iWidth;
y = inY; height = iHeight;
}
inline void Scale (T dx, T dy) { x *= dx; width *= dx; y *= dy; height *= dy;}
/// Set Center position of rectangle (size stays the same)
void SetCenterPos (T cx, T cy) { x = cx - width / 2; y = cy - height / 2; }
Vector2f GetCenterPos() const { return Vector2f(x + (BaseType)width / 2, y + (BaseType)height / 2); }
/// Ensure this is inside the rect r.
void Clamp (const RectType &r)
{
T x2 = x + width;
T y2 = y + height;
T rx2 = r.x + r.width;
T ry2 = r.y + r.height;
if (x < r.x) x = r.x;
if (x2 > rx2) x2 = rx2;
if (y < r.y) y = r.y;
if (y2 > ry2) y2 = ry2;
width = x2 - x;
if (width < 0) width = 0;
height = y2 - y;
if (height < 0) height = 0;
}
/// Move rectangle by deltaX, deltaY.
inline void Move (T dX, T dY) { x += dX; y += dY; }
/// Return the width of rectangle.
inline T Width () const { return width; }
/// Return the height of rectangle.
inline T Height () const { return height; }
/// Return true if a point lies within rectangle bounds.
inline bool Contains (T px, T py) const { return (px >= x) && (px < x + width) && (py >= y) && (py < y + height); }
inline bool Contains (const Vector2f& p) const { return Contains(p.x, p.y); }
/// Return true if a relative point lies within rectangle bounds.
inline bool ContainsRel (T x, T y) const
{ return (x >= 0) && (x < Width ()) && (y >= 0) && (y < Height ()); }
inline bool Intersects(const RectType& r) const
{
// Rects are disjoint if there's at least one separating axis
bool disjoint = x + width < r.x;
disjoint |= r.x + r.width < x;
disjoint |= y + height < r.y;
disjoint |= r.y + r.height < y;
return !disjoint;
}
/// Normalize a rectangle such that xmin <= xmax and ymin <= ymax.
inline void Normalize ()
{
width = std::max<T>(width, 0);
height = std::max<T>(height, 0);
}
bool operator == (const RectType& r)const { return x == r.x && y == r.y && width == r.width && height == r.height; }
bool operator != (const RectType& r)const { return x != r.x || y != r.y || width != r.width || height != r.height; }
};
typedef RectT<float> Rectf;
typedef RectT<int> RectInt;
template<> inline const char* Rectf::GetTypeString () { return "Rectf"; }
template<> inline const char* RectInt::GetTypeString () { return "RectInt"; }
inline bool CompareApproximately (const Rectf& lhs, const Rectf& rhs)
{
return CompareApproximately (lhs.x, rhs.x) && CompareApproximately (lhs.y, rhs.y) &&
CompareApproximately (lhs.width, rhs.width) && CompareApproximately (lhs.height, rhs.height);
}
/// Make a rect with width & height
template<typename T>
inline RectT<T> MinMaxRect (T minx, T miny, T maxx, T maxy) { return RectT<T> (minx, miny, maxx - minx, maxy - miny); }
// RectT<float> specialization
template<>
inline bool Rectf::IsEmpty () const { return width <= 0.00001F || height <= 0.00001F; }
template<>
template<class TransferFunction> inline
void Rectf::Transfer (TransferFunction& transfer)
{
transfer.SetVersion(2);
TRANSFER (x);
TRANSFER (y);
TRANSFER (width);
TRANSFER (height);
#if UNITY_EDITOR
if (transfer.IsOldVersion(1))
{
float xmax=0.0F, ymax=0.0F, ymin=0.0F, xmin=0.0F;
TRANSFER (xmin);
TRANSFER (ymin);
TRANSFER (xmax);
TRANSFER (ymax);
*this = MinMaxRect(xmin, ymin, xmax, ymax);
}
#endif
}
#endif
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