Back to index

libsfml  1.6+dfsg2
Rect.inl
Go to the documentation of this file.
00001 
00002 //
00003 // SFML - Simple and Fast Multimedia Library
00004 // Copyright (C) 2007-2009 Laurent Gomila (laurent.gom@gmail.com)
00005 //
00006 // This software is provided 'as-is', without any express or implied warranty.
00007 // In no event will the authors be held liable for any damages arising from the use of this software.
00008 //
00009 // Permission is granted to anyone to use this software for any purpose,
00010 // including commercial applications, and to alter it and redistribute it freely,
00011 // subject to the following restrictions:
00012 //
00013 // 1. The origin of this software must not be misrepresented;
00014 //    you must not claim that you wrote the original software.
00015 //    If you use this software in a product, an acknowledgment
00016 //    in the product documentation would be appreciated but is not required.
00017 //
00018 // 2. Altered source versions must be plainly marked as such,
00019 //    and must not be misrepresented as being the original software.
00020 //
00021 // 3. This notice may not be removed or altered from any source distribution.
00022 //
00024 
00025 
00029 template <typename T>
00030 Rect<T>::Rect() :
00031 Left  (0),
00032 Top   (0),
00033 Right (0),
00034 Bottom(0)
00035 {
00036 
00037 }
00038 
00039 
00043 template <typename T>
00044 Rect<T>::Rect(T LeftCoord, T TopCoord, T RightCoord, T BottomCoord) :
00045 Left  (LeftCoord),
00046 Top   (TopCoord),
00047 Right (RightCoord),
00048 Bottom(BottomCoord)
00049 {
00050 
00051 }
00052 
00053 
00057 template <typename T>
00058 T Rect<T>::GetWidth() const
00059 {
00060     return Right - Left;
00061 }
00062 
00063 
00067 template <typename T>
00068 T Rect<T>::GetHeight() const
00069 {
00070     return Bottom - Top;
00071 }
00072 
00073 
00077 template <typename T>
00078 void Rect<T>::Offset(T OffsetX, T OffsetY)
00079 {
00080     Left   += OffsetX;
00081     Right  += OffsetX;
00082     Top    += OffsetY;
00083     Bottom += OffsetY;
00084 }
00085 
00086 
00090 template <typename T>
00091 bool Rect<T>::Contains(T X, T Y) const
00092 {
00093     return (X >= Left) && (X <= Right) && (Y >= Top) && (Y <= Bottom);
00094 }
00095 
00096 
00100 template <typename T>
00101 bool Rect<T>::Intersects(const Rect<T>& Rectangle, Rect<T>* OverlappingRect) const
00102 {
00103     // Compute overlapping rect
00104     Rect Overlapping(std::max(Left,   Rectangle.Left),
00105                      std::max(Top,    Rectangle.Top),
00106                      std::min(Right,  Rectangle.Right),
00107                      std::min(Bottom, Rectangle.Bottom));
00108 
00109     // If overlapping rect is valid, then there is intersection
00110     if ((Overlapping.Left < Overlapping.Right) && (Overlapping.Top < Overlapping.Bottom))
00111     {
00112         if (OverlappingRect)
00113             *OverlappingRect = Overlapping;
00114         return true;
00115     }
00116     else
00117     {
00118         if (OverlappingRect)
00119             *OverlappingRect = Rect(0, 0, 0, 0);
00120         return false;
00121     }
00122 }