src/object/platform.cpp

   1 //  SuperTux
   2 //  Copyright (C) 2006 Matthias Braun <matze@braunis.de>
   3 //
   4 //  This program is free software: you can redistribute it and/or modify
   5 //  it under the terms of the GNU General Public License as published by
   6 //  the Free Software Foundation, either version 3 of the License, or
   7 //  (at your option) any later version.
   8 //
   9 //  This program is distributed in the hope that it will be useful,
  10 //  but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 //  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 //  GNU General Public License for more details.
  13 //
  14 //  You should have received a copy of the GNU General Public License
  15 //  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16
  17 #include "object/platform.hpp"
  18
  19 #include "object/player.hpp"
  20 #include "scripting/platform.hpp"
  21 #include "scripting/squirrel_util.hpp"
  22 #include "supertux/object_factory.hpp"
  23 #include "supertux/sector.hpp"
  24 #include "util/reader.hpp"
  25
  26 Platform::Platform(const Reader& reader) :
  27   MovingSprite(reader, Vector(0,0), LAYER_OBJECTS, COLGROUP_STATIC),
  28   path(),
  29   walker(),
  30   speed(Vector(0,0)),
  31   automatic(false),
  32   player_contact(false),
  33   last_player_contact(false)
  34 {
  35   bool running = true;
  36   reader.get("name", name);
  37   reader.get("running", running);
  38   if ((name == "") && (!running)) automatic=true;
  39   const lisp::Lisp* pathLisp = reader.get_lisp("path");
  40   if(pathLisp == NULL)
  41     throw std::runtime_error("No path specified for platform");
  42   path.reset(new Path());
  43   path->read(*pathLisp);
  44   walker.reset(new PathWalker(path.get(), running));
  45   bbox.set_pos(path->get_base());
  46 }
  47
  48 /*
  49   Platform::Platform(const Platform& other) :
  50   MovingSprite(other),
  51   ScriptInterface(other),
  52   speed(other.speed),
  53   automatic(other.automatic),
  54   player_contact(false),
  55   last_player_contact(false)
  56   {
  57   name = other.name;
  58   path.reset(new Path(*other.path));
  59   walker.reset(new PathWalker(*other.walker));
  60   walker->path = &*path;
  61   }
  62 */
  63
  64 HitResponse
  65 Platform::collision(GameObject& other, const CollisionHit& )
  66 {
  67   if (dynamic_cast<Player*>(&other)) player_contact = true;
  68   return FORCE_MOVE;
  69 }
  70
  71 void
  72 Platform::update(float elapsed_time)
  73 {
  74   // check if Platform should automatically pick a destination
  75   if (automatic) {
  76
  77     if (!player_contact && !walker->is_moving()) {
  78       // Player doesn't touch platform and Platform is not moving
  79
  80       // Travel to node nearest to nearest player
  81       // FIXME: does not really use nearest player
  82       Player* player = 0;
  83       std::vector<Player*> players = Sector::current()->get_players();
  84       for (std::vector<Player*>::iterator playerIter = players.begin(); playerIter != players.end(); ++playerIter) {
  85         player = *playerIter;
  86       }
  87       if (player) {
  88         int nearest_node_id = path->get_nearest_node_no(player->get_bbox().p2);
  89         if (nearest_node_id != -1) {
  90           goto_node(nearest_node_id);
  91         }
  92       }
  93     }
  94
  95     if (player_contact && !last_player_contact && !walker->is_moving()) {
  96       // Player touched platform, didn't touch last frame and Platform is not moving
  97
  98       // Travel to node farthest from current position
  99       int farthest_node_id = path->get_farthest_node_no(get_pos());
 100       if (farthest_node_id != -1) {
 101         goto_node(farthest_node_id);
 102       }
 103     }
 104
 105     // Clear player_contact flag set by collision() method
 106     last_player_contact = player_contact;
 107     player_contact = false;
 108   }
 109
 110   movement = walker->advance(elapsed_time) - get_pos();
 111   speed = movement / elapsed_time;
 112 }
 113
 114 void
 115 Platform::goto_node(int node_no)
 116 {
 117   walker->goto_node(node_no);
 118 }
 119
 120 void
 121 Platform::start_moving()
 122 {
 123   walker->start_moving();
 124 }
 125
 126 void
 127 Platform::stop_moving()
 128 {
 129   walker->stop_moving();
 130 }
 131
 132 void
 133 Platform::expose(HSQUIRRELVM vm, SQInteger table_idx)
 134 {
 135   if (name.empty()) return;
 136   scripting::Platform* _this = new scripting::Platform(this);
 137   expose_object(vm, table_idx, _this, name, true);
 138 }
 139
 140 void
 141 Platform::unexpose(HSQUIRRELVM vm, SQInteger table_idx)
 142 {
 143   if (name.empty()) return;
 144   scripting::unexpose_object(vm, table_idx, name);
 145 }
 146
 147 /* EOF */