Path.h

   1 /*
   2  * This file is part of NumptyPhysics
   3  * Copyright (C) 2008 Tim Edmonds
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation; either version 3 of the
   8  * License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License for more details.
  14  *
  15  */
  16
  17 #ifndef PATH_H
  18 #define PATH_H
  19
  20 #include "Common.h"
  21 #include "Array.h"
  22
  23
  24 class Segment
  25 {
  26 public:
  27   Segment( const Vec2& p1, const Vec2& p2 )
  28     : m_p1(p1), m_p2(p2) {}
  29   float32 distanceTo( const Vec2& p );
  30 private:
  31   Vec2 m_p1, m_p2;
  32 };
  33
  34
  35 class Path : public Array<Vec2>
  36 {
  37 public:
  38   Path();
  39   Path( int n, Vec2* p );
  40   Path( const char *ptlist );
  41
  42   void makeRelative();
  43   Path& translate(const Vec2& xlate);
  44   Path& rotate(const b2Mat22& rot);
  45   Path& scale(float32 factor);
  46
  47   inline Vec2& origin() { return at(0); }
  48
  49   inline Path& operator&(const Vec2& other)
  50   {
  51     append(other);
  52     return *this;
  53   }
  54
  55   inline Path& operator&(const b2Vec2& other)
  56   {
  57     append(Vec2(other));
  58     return *this;
  59   }
  60
  61   inline Path operator+(const Vec2& p) const
  62   {
  63     Path r( *this );
  64     return r.translate( p );
  65   }
  66
  67   inline Path operator-(const Vec2& p) const
  68   {
  69     Path r( *this );
  70     Vec2 n( -p.x, -p.y );
  71     return r.translate( n );
  72   }
  73
  74   inline Path operator*(const b2Mat22& m) const
  75   {
  76     Path r( *this );
  77     return r.rotate( m );
  78   }
  79
  80   inline Path& operator+=(const Vec2& p)
  81   {
  82     return translate( p );
  83   }
  84
  85   inline Path& operator-=(const Vec2& p)
  86   {
  87     Vec2 n( -p.x, -p.y );
  88     return translate( n );
  89   }
  90
  91   inline int   numPoints() const { return size(); }
  92   inline const Vec2& point(int i) const { return at(i); }
  93   inline Vec2& point(int i) { return at(i); }
  94   inline Vec2& first() { return at(0); }
  95   inline Vec2& last() { return at(size()-1); }
  96
  97   void simplify( float32 threshold );
  98   Rect bbox() const;
  99
 100  private:
 101   void simplifySub( int first, int last, float32 threshold, bool* keepflags );
 102 };
 103
 104 #endif //PATH_H