src/core/geometry_func.cpp

   1 /*
   2  * This file is part of OpenTTD.
   3  * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
   4  * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
   5  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
   6  */
   7
   8 /** @file geometry_func.cpp Geometry functions. */
   9
  10 #include "../stdafx.h"
  11 #include "geometry_func.hpp"
  12 #include "math_func.hpp"
  13
  14 #include "../safeguards.h"
  15
  16 /**
  17  * Compute bounding box of both dimensions.
  18  * @param d1 First dimension.
  19  * @param d2 Second dimension.
  20  * @return The bounding box of both dimensions, the smallest dimension that surrounds both arguments.
  21  */
  22 Dimension maxdim(const Dimension &d1, const Dimension &d2)
  23 {
  24         Dimension d;
  25         d.width  = std::max(d1.width,  d2.width);
  26         d.height = std::max(d1.height, d2.height);
  27         return d;
  28 }
  29
  30 /**
  31  * Compute the bounding rectangle around two rectangles.
  32  * @param r1 First rectangle.
  33  * @param r2 Second rectangle.
  34  * @return The bounding rectangle, the smallest rectangle that contains both arguments.
  35  */
  36 Rect BoundingRect(const Rect &r1, const Rect &r2)
  37 {
  38         /* If either the first or the second is empty, return the other. */
  39         if (IsEmptyRect(r1)) return r2;
  40         if (IsEmptyRect(r2)) return r1;
  41
  42         Rect r;
  43
  44         r.top    = std::min(r1.top,    r2.top);
  45         r.bottom = std::max(r1.bottom, r2.bottom);
  46         r.left   = std::min(r1.left,   r2.left);
  47         r.right  = std::max(r1.right,  r2.right);
  48
  49         return r;
  50 }