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
  24 #include "log.hpp"
  25 #include "timer.hpp"
  26 #include "lisp/writer.hpp"
  27 #include "sprite/sprite.hpp"
  28
  29 WalkingBadguy::WalkingBadguy(const Vector& pos, const std::string& sprite_name, const std::string& walk_left_action, const std::string& walk_right_action, int layer)
  30   : BadGuy(pos, sprite_name, layer), walk_left_action(walk_left_action), walk_right_action(walk_right_action), walk_speed(80), max_drop_height(-1)
  31 {
  32 }
  33
  34 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)
  35   : 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)
  36 {
  37 }
  38
  39 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)
  40   : BadGuy(reader, sprite_name, layer), walk_left_action(walk_left_action), walk_right_action(walk_right_action), walk_speed(80), max_drop_height(-1)
  41 {
  42 }
  43
  44 void
  45 WalkingBadguy::write(lisp::Writer& writer)
  46 {
  47   writer.write("x", start_position.x);
  48   writer.write("y", start_position.y);
  49 }
  50
  51 void
  52 WalkingBadguy::initialize()
  53 {
  54   if(frozen)
  55     return;
  56   sprite->set_action(dir == LEFT ? walk_left_action : walk_right_action);
  57   bbox.set_size(sprite->get_current_hitbox_width(), sprite->get_current_hitbox_height());
  58   physic.set_velocity_x(dir == LEFT ? -walk_speed : walk_speed);
  59 }
  60
  61 void
  62 WalkingBadguy::active_update(float elapsed_time)
  63 {
  64   BadGuy::active_update(elapsed_time);
  65
  66   if (max_drop_height > -1) {
  67     if (on_ground() && might_fall(max_drop_height+1))
  68     {
  69       turn_around();
  70     }
  71   }
  72
  73 }
  74
  75 void
  76 WalkingBadguy::collision_solid(const CollisionHit& hit)
  77 {
  78
  79   update_on_ground_flag(hit);
  80
  81   if (hit.top) {
  82     if (physic.get_velocity_y() < 0) physic.set_velocity_y(0);
  83   }
  84   if (hit.bottom) {
  85     if (physic.get_velocity_y() > 0) physic.set_velocity_y(0);
  86   }
  87
  88   if ((hit.left && (hit.slope_normal.y == 0) && (dir == LEFT)) || (hit.right && (hit.slope_normal.y == 0) && (dir == RIGHT))) {
  89     turn_around();
  90   }
  91
  92 }
  93
  94 HitResponse
  95 WalkingBadguy::collision_badguy(BadGuy& , const CollisionHit& hit)
  96 {
  97
  98   if ((hit.left && (dir == LEFT)) || (hit.right && (dir == RIGHT))) {
  99     turn_around();
 100   }
 101
 102   return CONTINUE;
 103 }
 104
 105 void
 106 WalkingBadguy::turn_around()
 107 {
 108   if(frozen)
 109     return;
 110   dir = dir == LEFT ? RIGHT : LEFT;
 111   sprite->set_action(dir == LEFT ? walk_left_action : walk_right_action);
 112   physic.set_velocity_x(-physic.get_velocity_x());
 113
 114   // if we get dizzy, we fall off the screen
 115   if (turn_around_timer.started()) {
 116     if (turn_around_counter++ > 10) kill_fall();
 117   } else {
 118     turn_around_timer.start(1);
 119     turn_around_counter = 0;
 120   }
 121
 122 }
 123
 124 void
 125 WalkingBadguy::freeze()
 126 {
 127   BadGuy::freeze();
 128   physic.set_velocity_x(0);
 129 }
 130
 131 void
 132 WalkingBadguy::unfreeze()
 133 {
 134   BadGuy::unfreeze();
 135   WalkingBadguy::initialize();
 136 }
 137
 138
 139 float
 140 WalkingBadguy::get_velocity_y() const
 141 {
 142   return physic.get_velocity_y();
 143 }
 144
 145 void
 146 WalkingBadguy::set_velocity_y(float vy)
 147 {
 148   physic.set_velocity_y(vy);
 149 }