src/badguy/yeti.cpp

   1 //  $Id$
   2 //
   3 //  SuperTux
   4 //  Copyright (C) 2005 Matthias Braun <matze@braunis.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
  19 //  02111-1307, USA.
  20
  21 #include <config.h>
  22
  23 #include <float.h>
  24 #include "yeti.h"
  25 #include "object/camera.h"
  26 #include "yeti_stalactite.h"
  27 #include "bouncing_snowball.h"
  28
  29 static const float JUMP_VEL1 = 250;
  30 static const float JUMP_VEL2 = 700;
  31 static const float RUN_SPEED = 350;
  32 static const float JUMP_TIME = 1.6;
  33 static const float ANGRY_JUMP_WAIT = .5;
  34 static const int INITIAL_HITPOINTS = 3;
  35 static const int INITIAL_BULLET_HP = 10;
  36
  37 Yeti::Yeti(const lisp::Lisp& reader)
  38 {
  39   reader.get("x", start_position.x);
  40   reader.get("y", start_position.y);
  41   bbox.set_size(80, 120);
  42   sprite = sprite_manager->create("yeti");
  43   state = INIT;
  44   side = LEFT;
  45   hitpoints = INITIAL_HITPOINTS;
  46   bullet_hitpoints = INITIAL_BULLET_HP;
  47   sound_manager->preload_sound("yeti_gna");
  48   sound_manager->preload_sound("yeti_roar");
  49 }
  50
  51 Yeti::~Yeti()
  52 {
  53   Mix_FreeChunk(sound_gna);
  54 }
  55
  56 void
  57 Yeti::active_action(float elapsed_time)
  58 {
  59   switch(state) {
  60     case INIT:
  61       break;
  62     case GO_RIGHT:
  63       physic.set_velocity_x(RUN_SPEED);
  64       if(timer.check())
  65         physic.set_velocity_y(JUMP_VEL2);
  66       break;
  67     case GO_LEFT:
  68       physic.set_velocity_x(-RUN_SPEED);
  69       if(timer.check())
  70         physic.set_velocity_y(JUMP_VEL2);
  71       break;
  72     case ANGRY_JUMPING:
  73       if(timer.check()) {
  74         // jump
  75         sound_manager->play_sound("yeti_gna");
  76         physic.set_velocity_y(JUMP_VEL1);
  77       }
  78       break;
  79     default:
  80       break;
  81   }
  82
  83   movement = physic.get_movement(elapsed_time);
  84 }
  85
  86 void
  87 Yeti::go_right()
  88 {
  89   // jump and move right
  90   physic.set_velocity_y(JUMP_VEL1);
  91   physic.set_velocity_x(RUN_SPEED);
  92   state = GO_RIGHT;
  93   timer.start(JUMP_TIME);
  94 }
  95
  96 void
  97 Yeti::go_left()
  98 {
  99   physic.set_velocity_y(JUMP_VEL1);
 100   physic.set_velocity_x(-RUN_SPEED);
 101   state = GO_LEFT;
 102   timer.start(JUMP_TIME);
 103 }
 104
 105 void
 106 Yeti::angry_jumping()
 107 {
 108   jumpcount = 0;
 109   timer.start(ANGRY_JUMP_WAIT);
 110   state = ANGRY_JUMPING;
 111   physic.set_velocity_x(0);
 112 }
 113
 114 void
 115 Yeti::summon_snowball()
 116 {
 117   Sector::current()->add_object(new BouncingSnowball(get_pos().x+(side == LEFT ? 64 : -64), get_pos().y, (side == LEFT ? RIGHT : LEFT)));
 118 }
 119
 120 HitResponse
 121 Yeti::collision_player(Player& player, const CollisionHit& hit)
 122 {
 123   if(player.is_invincible()) {
 124     kill_fall();
 125     return ABORT_MOVE;
 126   }
 127   if(hit.normal.y > .9) {
 128     hitpoints--;
 129     bullet_hitpoints--;
 130     sound_manager->play_sound("yeti_roar");
 131     if(collision_squished(player))
 132       return ABORT_MOVE;
 133     else if (hitpoints <= 0) {
 134       bullet_hitpoints = 0;
 135       player.kill(Player::SHRINK);
 136       return FORCE_MOVE;
 137     }
 138   }
 139   player.kill(Player::SHRINK);
 140   return FORCE_MOVE;
 141 }
 142
 143 bool
 144 Yeti::collision_squished(Player& player)
 145 {
 146   bool result = false;
 147   player.bounce(*this);
 148   if (hitpoints <= 0) {
 149     bullet_hitpoints = 0;
 150     //sprite->set_action("dead");
 151     kill_squished(player);
 152     result = true;
 153   }
 154   return result;
 155 }
 156
 157 void
 158 Yeti::write(lisp::Writer& )
 159 {
 160 }
 161
 162 void
 163 Yeti::drop_stalactite()
 164 {
 165   YetiStalactite* nearest = 0;
 166   float dist = FLT_MAX;
 167
 168   Sector* sector = Sector::current();
 169   for(Sector::GameObjects::iterator i = sector->gameobjects.begin();
 170       i != sector->gameobjects.end(); ++i) {
 171     YetiStalactite* stalactite = dynamic_cast<YetiStalactite*> (*i);
 172     if(stalactite && stalactite->is_hanging()) {
 173       float sdist
 174         = fabsf(stalactite->get_pos().x - sector->player->get_pos().x);
 175       if(sdist < dist) {
 176         nearest = stalactite;
 177         dist = sdist;
 178       }
 179     }
 180   }
 181
 182   if(nearest)
 183     nearest->start_shaking();
 184 }
 185
 186 HitResponse
 187 Yeti::collision_solid(GameObject& , const CollisionHit& hit)
 188 {
 189   if(fabsf(hit.normal.y) > .5) { // hit floor or roof?
 190     physic.set_velocity_y(0);
 191     if(state == INIT) {
 192       go_right();
 193     } else if(state == GO_LEFT && !timer.started()) {
 194       side = LEFT;
 195       summon_snowball();
 196       angry_jumping();
 197     } else if(state == GO_RIGHT && !timer.started()) {
 198       side = RIGHT;
 199       summon_snowball();
 200       angry_jumping();
 201     } else if(state == ANGRY_JUMPING) {
 202       if(!timer.started()) {
 203         // we just landed
 204         jumpcount++;
 205         // make a stalactite falling down and shake camera a bit
 206         Sector::current()->camera->shake(.1, 0, 10);
 207         drop_stalactite();
 208
 209         // go to other side after 3 jumps
 210         if(jumpcount == 3) {
 211           if(side == LEFT)
 212             go_right();
 213           else
 214             go_left();
 215         } else {
 216           // jump again
 217           timer.start(ANGRY_JUMP_WAIT);
 218         }
 219       }
 220     }
 221   }
 222
 223   return CONTINUE;
 224 }
 225
 226 void
 227 Yeti::kill_fall()
 228 {
 229   sound_manager->play_sound("yeti_roar");
 230   bullet_hitpoints--;
 231   if (bullet_hitpoints <= 0) {
 232     sound_manager->play_sound("fall", this,
 233                               Sector::current()->player->get_pos());
 234     physic.set_velocity_y(0);
 235     physic.enable_gravity(true);
 236     set_state(STATE_FALLING);
 237   }
 238 }
 239
 240 IMPLEMENT_FACTORY(Yeti, "yeti")