src/badguy/walking_badguy.cpp

   1 //  $Id$
   2 //
   3 //  SuperTux - WalkingBadguy
   4 //  Copyright (C) 2006 Christoph Sommer <christoph.sommer@2006.expires.deltadevelopment.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 #include <config.h>
  21
  22 #include "walking_badguy.hpp"
  23 #include "log.hpp"
  24 #include "timer.hpp"
  25
  26 WalkingBadguy::WalkingBadguy(const Vector& pos, const std::string& sprite_name, const std::string& walk_left_action, const std::string& walk_right_action, int layer)
  27   : BadGuy(pos, sprite_name, layer), walk_left_action(walk_left_action), walk_right_action(walk_right_action), walk_speed(80), max_drop_height(-1)
  28 {
  29 }
  30
  31 WalkingBadguy::WalkingBadguy(const Vector& pos, Direction direction, const std::string& sprite_name, const std::string& walk_left_action, const std::string& walk_right_action, int layer)
  32   : BadGuy(pos, direction, sprite_name, layer), walk_left_action(walk_left_action), walk_right_action(walk_right_action), walk_speed(80), max_drop_height(-1)
  33 {
  34 }
  35
  36 WalkingBadguy::WalkingBadguy(const lisp::Lisp& reader, const std::string& sprite_name, const std::string& walk_left_action, const std::string& walk_right_action, int layer)
  37   : BadGuy(reader, sprite_name, layer), walk_left_action(walk_left_action), walk_right_action(walk_right_action), walk_speed(80), max_drop_height(-1)
  38 {
  39 }
  40
  41 void
  42 WalkingBadguy::write(lisp::Writer& writer)
  43 {
  44   writer.write_float("x", start_position.x);
  45   writer.write_float("y", start_position.y);
  46 }
  47
  48 void
  49 WalkingBadguy::initialize()
  50 {
  51   if(frozen)
  52     return;
  53   sprite->set_action(dir == LEFT ? walk_left_action : walk_right_action);
  54   bbox.set_size(sprite->get_current_hitbox_width(), sprite->get_current_hitbox_height());
  55   physic.set_velocity_x(dir == LEFT ? -walk_speed : walk_speed);
  56 }
  57
  58 void
  59 WalkingBadguy::active_update(float elapsed_time)
  60 {
  61   BadGuy::active_update(elapsed_time);
  62
  63   if (max_drop_height > -1) {
  64     if (on_ground() && might_fall(max_drop_height+1))
  65     {
  66       turn_around();
  67     }
  68   }
  69
  70 }
  71
  72 void
  73 WalkingBadguy::collision_solid(const CollisionHit& hit)
  74 {
  75
  76   update_on_ground_flag(hit);
  77
  78   if (hit.top) {
  79     if (physic.get_velocity_y() < 0) physic.set_velocity_y(0);
  80   }
  81   if (hit.bottom) {
  82     if (physic.get_velocity_y() > 0) physic.set_velocity_y(0);
  83   }
  84
  85   if ((hit.left && (hit.slope_normal.y == 0) && (dir == LEFT)) || (hit.right && (hit.slope_normal.y == 0) && (dir == RIGHT))) {
  86     turn_around();
  87   }
  88
  89 }
  90
  91 HitResponse
  92 WalkingBadguy::collision_badguy(BadGuy& , const CollisionHit& hit)
  93 {
  94
  95   if ((hit.left && (dir == LEFT)) || (hit.right && (dir == RIGHT))) {
  96     turn_around();
  97   }
  98
  99   return CONTINUE;
 100 }
 101
 102 void
 103 WalkingBadguy::turn_around()
 104 {
 105   if(frozen)
 106     return;
 107   dir = dir == LEFT ? RIGHT : LEFT;
 108   sprite->set_action(dir == LEFT ? walk_left_action : walk_right_action);
 109   physic.set_velocity_x(-physic.get_velocity_x());
 110
 111   // if we get dizzy, we fall off the screen
 112   if (turn_around_timer.started()) {
 113     if (turn_around_counter++ > 10) kill_fall();
 114   } else {
 115     turn_around_timer.start(1);
 116     turn_around_counter = 0;
 117   }
 118
 119 }
 120
 121 void
 122 WalkingBadguy::freeze()
 123 {
 124   BadGuy::freeze();
 125   physic.set_velocity_x(0);
 126 }
 127
 128 void
 129 WalkingBadguy::unfreeze()
 130 {
 131   BadGuy::unfreeze();
 132   WalkingBadguy::initialize();
 133 }
 134
 135
 136 float
 137 WalkingBadguy::get_velocity_y() const
 138 {
 139   return physic.get_velocity_y();
 140 }
 141
 142 void
 143 WalkingBadguy::set_velocity_y(float vy)
 144 {
 145   physic.set_velocity_y(vy);
 146 }