rectClipper.h

Classes:

class
Detailed Description

 1
 2//-----------------------------------------------------------------------------
 3// Copyright (c) 2012 GarageGames, LLC
 4//
 5// Permission is hereby granted, free of charge, to any person obtaining a copy
 6// of this software and associated documentation files (the "Software"), to
 7// deal in the Software without restriction, including without limitation the
 8// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
 9// sell copies of the Software, and to permit persons to whom the Software is
10// furnished to do so, subject to the following conditions:
11//
12// The above copyright notice and this permission notice shall be included in
13// all copies or substantial portions of the Software.
14//
15// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21// IN THE SOFTWARE.
22//-----------------------------------------------------------------------------
23
24#ifndef _RECTCLIPPER_H_
25#define _RECTCLIPPER_H_
26
27//Includes
28#ifndef _PLATFORM_H_
29#include "platform/platform.h"
30#endif
31#ifndef _MRECT_H_
32#include "math/mRect.h"
33#endif
34
35
36class RectClipper
37{
38   RectI m_clipRect;
39
40  public:
41   RectClipper(const RectI& in_rRect);
42
43   bool  clipPoint(const Point2I& in_rPoint) const;
44   bool  clipLine(const Point2I& in_rStart,
45                  const Point2I& in_rEnd,
46                  Point2I&       out_rStart,
47                  Point2I&       out_rEnd) const;
48   bool  clipRect(const RectI& in_rRect,
49                  RectI&       out_rRect) const;
50};
51
52//------------------------------------------------------------------------------
53//-------------------------------------- INLINES
54//
55inline
56RectClipper::RectClipper(const RectI& in_rRect)
57 : m_clipRect(in_rRect)
58{
59   //
60}
61
62inline bool
63RectClipper::clipPoint(const Point2I& in_rPoint) const
64{
65   if ((in_rPoint.x < m_clipRect.point.x) ||
66       (in_rPoint.y < m_clipRect.point.y) ||
67       (in_rPoint.x >= m_clipRect.point.x + m_clipRect.extent.x) ||
68       (in_rPoint.y >= m_clipRect.point.y + m_clipRect.extent.y))
69      return false;
70   return true;
71}
72
73#endif //_RECTCLIPPER_H_
74