spring.hxx

   1 //  $Id: spring.hxx,v 1.7 2003/07/24 15:53:21 grumbel Exp $
   2 //
   3 //  Construo - A wire-frame construction game
   4 //  Copyright (C) 2002 Ingo Ruhnke <grumbel@gmx.de>
   5 //
   6 //  This program is free software; you can redistribute it and/or
   7 //  modify it under the terms of the GNU General Public License
   8 //  as published by the Free Software Foundation; either version 2
   9 //  of the License, or (at your option) any later version.
  10 //
  11 //  This program is distributed in the hope that it will be useful,
  12 //  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 //  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 //  GNU General Public License for more details.
  15 //
  16 //  You should have received a copy of the GNU General Public License
  17 //  along with this program; if not, write to the Free Software
  18 //  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  19
  20 #ifndef HEADER_CONSTRUO_SPRING_HXX
  21 #define HEADER_CONSTRUO_SPRING_HXX
  22
  23 #include <iostream>
  24 #include <assert.h>
  25 #include "particle.hxx"
  26 #include "world.hxx"
  27 #include "lisp_reader.hxx"
  28
  29 class World;
  30
  31 class Spring
  32 {
  33 public:
  34   /** Pointers to the two particles to which the Spring is
  35       connected */
  36   std::pair<Particle*, Particle*> particles;
  37
  38   /** The orignial length of the Spring, the actually length on the
  39       screen is different, since the spring can be streched */
  40   float length;
  41
  42   /** */
  43   bool destroyed;
  44
  45   float stiffness;
  46   float damping;
  47   float max_stretch;
  48
  49   Spring (Particle* f, Particle* s, float l);
  50   Spring (Particle* f, Particle* s);
  51
  52   Spring (World* world, lisp_object_t* cursor);
  53
  54   ~Spring ();
  55
  56   void update (float delta);
  57   void draw (ZoomGraphicContext* gc);
  58   void draw_highlight (ZoomGraphicContext* gc);
  59
  60   /** Forces the recalculation of the springs length */
  61   void recalc_length ();
  62
  63   lisp_object_t* serialize();
  64 };
  65
  66 #endif
  67
  68 /* EOF */