src/special.cpp

   1 //  $Id$
   2 //
   3 //  SuperTux -  A Jump'n Run
   4 //  Copyright (C) 2003 Tobias Glaesser <tobi.web@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 #include <cassert>
  21 #include <iostream>
  22
  23 #include "SDL.h"
  24
  25 #include "defines.h"
  26 #include "special.h"
  27 #include "camera.h"
  28 #include "gameloop.h"
  29 #include "video/screen.h"
  30 #include "scene.h"
  31 #include "app/globals.h"
  32 #include "player.h"
  33 #include "sector.h"
  34 #include "special/sprite_manager.h"
  35 #include "resources.h"
  36
  37 Sprite* img_firebullet;
  38 Sprite* img_icebullet;
  39 Sprite* img_star;
  40 Sprite* img_growup;
  41 Sprite* img_iceflower;
  42 Sprite* img_fireflower;
  43 Sprite* img_1up;
  44
  45 #define GROWUP_SPEED 1.0f
  46
  47 #define BULLET_STARTING_YM 0
  48 #define BULLET_XM 6
  49
  50 Bullet::Bullet(const Vector& pos, float xm, int dir, int kind_)
  51 {
  52   life_count = 3;
  53   base.width = 4;
  54   base.height = 4;
  55
  56   if (kind == ICE_BULLET)
  57     life_count = 6; //ice-bullets get "extra lives" for bumping off walls
  58
  59   if (dir == RIGHT)
  60     {
  61       base.x = pos.x + 32;
  62       physic.set_velocity_x(BULLET_XM + xm);
  63     }
  64   else
  65     {
  66       base.x = pos.x;
  67       physic.set_velocity_x(-BULLET_XM + xm);
  68     }
  69
  70   base.y = pos.y;
  71   physic.set_velocity_y(-BULLET_STARTING_YM);
  72   old_base = base;
  73   kind = kind_;
  74 }
  75
  76 void
  77 Bullet::action(float elapsed_time)
  78 {
  79   elapsed_time *= 0.5f;
  80
  81   float old_y = base.y;
  82
  83   physic.apply(elapsed_time, base.x, base.y,  Sector::current()->gravity);
  84   collision_swept_object_map(&old_base,&base);
  85
  86   if (issolid(base.x+2, base.y + 4) || issolid(base.x+2, base.y))
  87     {
  88       base.y  = old_y;
  89       physic.set_velocity_y(-physic.get_velocity_y());
  90       life_count -= 1;
  91     }
  92
  93   if(kind == FIRE_BULLET)
  94     // @not framerate independant :-/
  95     physic.set_velocity_y(physic.get_velocity_y() - 0.5 * elapsed_time);
  96   if(physic.get_velocity_y() > 9)
  97     physic.set_velocity_y(9);
  98   else if(physic.get_velocity_y() < -9)
  99     physic.set_velocity_y(-9);
 100
 101   float scroll_x =
 102     Sector::current()->camera->get_translation().x;
 103   float scroll_y =
 104     Sector::current()->camera->get_translation().y;
 105   if (base.x < scroll_x ||
 106       base.x > scroll_x + screen->w ||
 107 //      base.y < scroll_y ||
 108       base.y > scroll_y + screen->h ||
 109       life_count <= 0)
 110     {
 111       remove_me();
 112     }
 113   if (issolid(base.x + 4, base.y + 2) ||
 114       issolid(base.x, base.y + 2))
 115      {
 116        if (kind == FIRE_BULLET)
 117          remove_me();
 118        else if (kind == ICE_BULLET)
 119          {
 120            physic.set_velocity_x(-physic.get_velocity_x());
 121            //physic.set_velocity_y(-physic.get_velocity_y());
 122          }
 123      }
 124 }
 125
 126 void
 127 Bullet::draw(DrawingContext& context)
 128 {
 129   Sprite* sprite = kind == FIRE_BULLET ? img_firebullet : img_icebullet;
 130
 131   sprite->draw(context, Vector(base.x, base.y), LAYER_OBJECTS);
 132 }
 133
 134 void
 135 Bullet::collision(const MovingObject& , int)
 136 {
 137   // later
 138 }
 139
 140 void
 141 Bullet::collision(int c_object)
 142 {
 143   if(c_object == CO_BADGUY) {
 144     remove_me();
 145   }
 146 }
 147
 148 //---------------------------------------------------------------------------
 149
 150 Upgrade::Upgrade(const Vector& pos, Direction dir_, UpgradeKind kind_)
 151 {
 152   kind = kind_;
 153   dir = dir_;
 154
 155   base.width = 32;
 156   base.height = 0;
 157   base.x = pos.x;
 158   base.y = pos.y;
 159   old_base = base;
 160
 161   physic.reset();
 162   physic.enable_gravity(false);
 163
 164   if(kind == UPGRADE_1UP || kind == UPGRADE_STAR) {
 165     physic.set_velocity(dir == LEFT ? -1 : 1, 4);
 166     physic.enable_gravity(true);
 167     base.height = 32;
 168   } else if (kind == UPGRADE_ICEFLOWER || kind == UPGRADE_FIREFLOWER) {
 169     // nothing
 170   } else if (kind == UPGRADE_GROWUP) {
 171     physic.set_velocity(dir == LEFT ? -GROWUP_SPEED : GROWUP_SPEED, 0);
 172   } else {
 173     physic.set_velocity(dir == LEFT ? -2 : 2, 0);
 174   }
 175 }
 176
 177 Upgrade::~Upgrade()
 178 {
 179 }
 180
 181 void
 182 Upgrade::action(float elapsed_time)
 183 {
 184   if (kind == UPGRADE_ICEFLOWER || kind == UPGRADE_FIREFLOWER
 185       || kind == UPGRADE_GROWUP) {
 186     if (base.height < 32) {
 187       /* Rise up! */
 188       base.height = base.height + 0.7 * elapsed_time;
 189       if(base.height > 32)
 190         base.height = 32;
 191
 192       return;
 193     }
 194   }
 195
 196   /* Away from the screen? Kill it! */
 197   float scroll_x =
 198     Sector::current()->camera->get_translation().x;
 199   float scroll_y =
 200     Sector::current()->camera->get_translation().y;
 201
 202   if(base.x < scroll_x - X_OFFSCREEN_DISTANCE ||
 203       base.x > scroll_x + screen->w + X_OFFSCREEN_DISTANCE ||
 204       base.y < scroll_y - Y_OFFSCREEN_DISTANCE ||
 205       base.y > scroll_y + screen->h + Y_OFFSCREEN_DISTANCE)
 206     {
 207     remove_me();
 208     return;
 209     }
 210
 211   /* Move around? */
 212   physic.apply(elapsed_time, base.x, base.y, Sector::current()->gravity);
 213   if(kind == UPGRADE_GROWUP || kind == UPGRADE_STAR) {
 214     collision_swept_object_map(&old_base, &base);
 215   }
 216
 217   // fall down?
 218   if(kind == UPGRADE_GROWUP || kind == UPGRADE_STAR) {
 219     // falling?
 220     if(physic.get_velocity_y() != 0) {
 221       if(issolid(base.x, base.y + base.height)) {
 222         base.y = int(base.y / 32) * 32;
 223         old_base = base;
 224         if(kind == UPGRADE_GROWUP) {
 225           physic.enable_gravity(false);
 226           physic.set_velocity(dir == LEFT ? -GROWUP_SPEED : GROWUP_SPEED, 0);
 227         } else if(kind == UPGRADE_STAR) {
 228           physic.set_velocity(dir == LEFT ? -2 : 2, 3);
 229         }
 230       }
 231     } else {
 232       if((physic.get_velocity_x() < 0
 233             && !issolid(base.x+base.width, base.y + base.height))
 234         || (physic.get_velocity_x() > 0
 235             && !issolid(base.x, base.y + base.height))) {
 236         physic.enable_gravity(true);
 237       }
 238     }
 239   }
 240
 241   // horizontal bounce?
 242   if(kind == UPGRADE_GROWUP || kind == UPGRADE_STAR) {
 243     if (  (physic.get_velocity_x() < 0
 244           && issolid(base.x, (int) base.y + base.height/2))
 245         ||  (physic.get_velocity_x() > 0
 246           && issolid(base.x + base.width, (int) base.y + base.height/2))) {
 247         physic.set_velocity(-physic.get_velocity_x(),physic.get_velocity_y());
 248         dir = dir == LEFT ? RIGHT : LEFT;
 249     }
 250   }
 251 }
 252
 253 void
 254 Upgrade::draw(DrawingContext& context)
 255 {
 256   Sprite* sprite;
 257   switch(kind) {
 258     case UPGRADE_GROWUP: sprite = img_growup; break;
 259     case UPGRADE_ICEFLOWER: sprite = img_iceflower; break;
 260     case UPGRADE_FIREFLOWER: sprite = img_fireflower; break;
 261     case UPGRADE_STAR: sprite = img_star; break;
 262     case UPGRADE_1UP: sprite = img_1up; break;
 263     default:
 264       assert(!"wrong type in Powerup::draw()");
 265       sprite = NULL;            // added by neoneurone, g++ likes this !
 266   }
 267
 268   if(base.height < 32) // still raising up?
 269     sprite->draw(context, Vector(base.x, base.y + (32 - base.height)),
 270         LAYER_TILES - 10);
 271   else
 272     sprite->draw(context, Vector(base.x, base.y), LAYER_OBJECTS);
 273 }
 274
 275 void
 276 Upgrade::bump(Player* player)
 277 {
 278   // these can't be bumped
 279   if(kind != UPGRADE_GROWUP)
 280     return;
 281
 282   SoundManager::get()->play_sound(IDToSound(SND_BUMP_UPGRADE), Vector(base.x, base.y), Sector::current()->player->get_pos());
 283
 284   // determine new direction
 285   Direction old_dir = dir;
 286   if (player->base.x + player->base.width/2 > base.x + base.width/2)
 287     dir = LEFT;
 288   else
 289     dir = RIGHT;
 290
 291   // do a little jump and change direction (if necessary)
 292   if (dir != old_dir)
 293     physic.set_velocity(-physic.get_velocity_x(), 3);
 294   else
 295     physic.set_velocity_y(3);
 296
 297   physic.enable_gravity(true);
 298 }
 299
 300 void
 301 Upgrade::collision(const MovingObject& , int)
 302 {
 303   // later
 304 }
 305
 306 void
 307 Upgrade::collision(void* p_c_object, int c_object, CollisionType type)
 308 {
 309   Player* pplayer = NULL;
 310
 311   if(type == COLLISION_BUMP) {
 312     if(c_object == CO_PLAYER)
 313       pplayer = (Player*) p_c_object;
 314     bump(pplayer);
 315     return;
 316   }
 317
 318   switch (c_object)
 319     {
 320     case CO_PLAYER:
 321       /* Remove the upgrade: */
 322
 323       /* p_c_object is CO_PLAYER, so assign it to pplayer */
 324       pplayer = (Player*) p_c_object;
 325
 326       /* Affect the player: */
 327
 328       if (kind == UPGRADE_GROWUP)
 329         {
 330           SoundManager::get()->play_sound(IDToSound(SND_EXCELLENT));
 331           pplayer->grow(true);
 332         }
 333       else if (kind == UPGRADE_FIREFLOWER)
 334         {
 335           SoundManager::get()->play_sound(IDToSound(SND_COFFEE));
 336           pplayer->grow(true);
 337           pplayer->got_power = pplayer->FIRE_POWER;
 338         }
 339       else if (kind == UPGRADE_ICEFLOWER)
 340         {
 341           SoundManager::get()->play_sound(IDToSound(SND_COFFEE));
 342           pplayer->grow(true);
 343           pplayer->got_power = pplayer->ICE_POWER;
 344         }
 345       else if (kind == UPGRADE_FIREFLOWER)
 346         {
 347           SoundManager::get()->play_sound(IDToSound(SND_COFFEE));
 348           pplayer->grow(true);
 349           pplayer->got_power = pplayer->FIRE_POWER;
 350         }
 351       else if (kind == UPGRADE_STAR)
 352         {
 353           SoundManager::get()->play_sound(IDToSound(SND_HERRING));
 354           pplayer->invincible_timer.start(TUX_INVINCIBLE_TIME);
 355           Sector::current()->play_music(HERRING_MUSIC);
 356         }
 357       else if (kind == UPGRADE_1UP)
 358         {
 359           if(player_status.lives < MAX_LIVES) {
 360             player_status.lives++;
 361             SoundManager::get()->play_sound(IDToSound(SND_LIFEUP));
 362           }
 363         }
 364
 365       remove_me();
 366       return;
 367     }
 368 }
 369
 370 void load_special_gfx()
 371 {
 372   img_growup    = sprite_manager->load("egg");
 373   img_iceflower = sprite_manager->load("iceflower");
 374   img_fireflower = sprite_manager->load("fireflower");
 375   img_star      = sprite_manager->load("star");
 376   img_1up       = sprite_manager->load("1up");
 377
 378   img_firebullet = sprite_manager->load("firebullet");
 379   img_icebullet  = sprite_manager->load("icebullet");
 380 }
 381
 382 void free_special_gfx()
 383 {
 384 }
 385