rectangle.cpp

00001 /*      _______   __   __   __   ______   __   __   _______   __   __
00002  *     / _____/\ / /\ / /\ / /\ / ____/\ / /\ / /\ / ___  /\ /  |\/ /\
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00007  * \______\/ \______\/ \_\/ \_____\/ \_\/ \_\/ \_\/ \_\/ \_\/ \_\/
00008  *
00009  * Copyright (c) 2004, 2005, 2006 Olof Naessén and Per Larsson
00010  *
00011  *                                                         Js_./
00012  * Per Larsson a.k.a finalman                          _RqZ{a<^_aa
00013  * Olof Naessén a.k.a jansem/yakslem                _asww7!uY`>  )\a//
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00056 
00057 /*
00058  * For comments regarding functions please see the header file.
00059  */
00060 
00061 #include "guichan/rectangle.hpp"
00062 
00063 namespace gcn
00064 {
00065     Rectangle::Rectangle()
00066     {
00067         x = 0;
00068         y = 0;
00069         width = 0;
00070         height = 0;
00071     }
00072 
00073     Rectangle::Rectangle(int x, int y, int width, int height)
00074     {
00075         this->x = x;
00076         this->y = y;
00077         this->width = width;
00078         this->height = height;
00079     }
00080 
00081     void Rectangle::setAll(int x, int y, int width, int height)
00082     {
00083         this->x = x;
00084         this->y = y;
00085         this->width = width;
00086         this->height = height;
00087     }
00088 
00089     bool Rectangle::intersect(const Rectangle& rectangle)
00090     {
00091         x -= rectangle.x;
00092         y -= rectangle.y;
00093 
00094         if (x < 0)
00095         {
00096             width += x;
00097             x = 0;
00098         }
00099 
00100         if (y < 0)
00101         {
00102             height += y;
00103             y = 0;
00104         }
00105 
00106         if (x + width > rectangle.width)
00107         {
00108             width = rectangle.width - x;
00109         }
00110 
00111         if (y + height > rectangle.height)
00112         {
00113             height = rectangle.height - y;
00114         }
00115 
00116         if (width <= 0 || height <= 0)
00117         {
00118             height = 0;
00119             width = 0;
00120             x += rectangle.x;
00121             y += rectangle.y;
00122             return false;
00123         }
00124 
00125         x += rectangle.x;
00126         y += rectangle.y;
00127         return true;
00128     }
00129 
00130     bool Rectangle::isPointInRect(int x, int y) const
00131     {
00132         return ((x >= this->x) && (y >= this->y)
00133                 && x < (this->x + this->width)
00134                 && y < (this->y + this->height));
00135     }
00136 }

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