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 "screen/screen.h"
  30 #include "sound.h"
  31 #include "scene.h"
  32 #include "globals.h"
  33 #include "player.h"
  34 #include "sector.h"
  35 #include "sprite_manager.h"
  36 #include "resources.h"
  37
  38 Sprite* img_firebullet;
  39 Sprite* img_icebullet;
  40 Sprite* img_star;
  41 Sprite* img_growup;
  42 Sprite* img_iceflower;
  43 Sprite* img_fireflower;
  44 Sprite* img_1up;
  45
  46 #define GROWUP_SPEED 1.0f
  47
  48 #define BULLET_STARTING_YM 0
  49 #define BULLET_XM 6
  50
  51 Bullet::Bullet(const Vector& pos, float xm, int dir, int kind_)
  52 {
  53   life_count = 3;
  54   base.width = 4;
  55   base.height = 4;
  56
  57   if (kind == ICE_BULLET)
  58     life_count = 6; //ice-bullets get "extra lives" for bumping off walls
  59
  60   if (dir == RIGHT)
  61     {
  62       base.x = pos.x + 32;
  63       physic.set_velocity_x(BULLET_XM + xm);
  64     }
  65   else
  66     {
  67       base.x = pos.x;
  68       physic.set_velocity_x(-BULLET_XM + xm);
  69     }
  70
  71   base.y = pos.y;
  72   physic.set_velocity_y(-BULLET_STARTING_YM);
  73   old_base = base;
  74   kind = kind_;
  75 }
  76
  77 void
  78 Bullet::action(float elapsed_time)
  79 {
  80   elapsed_time *= 0.5f;
  81
  82   float old_y = base.y;
  83
  84   physic.apply(elapsed_time, base.x, base.y);
  85   collision_swept_object_map(&old_base,&base);
  86
  87   if (issolid(base.x, base.y + 4) || issolid(base.x, base.y))
  88     {
  89       base.y  = old_y;
  90       physic.set_velocity_y(-physic.get_velocity_y());
  91       life_count -= 1;
  92     }
  93
  94   if(kind == FIRE_BULLET)
  95     // @not framerate independant :-/
  96     physic.set_velocity_y(physic.get_velocity_y() - 0.5 * elapsed_time);
  97   if(physic.get_velocity_y() > 9)
  98     physic.set_velocity_y(9);
  99   else if(physic.get_velocity_y() < -9)
 100     physic.set_velocity_y(-9);
 101
 102   float scroll_x =
 103     Sector::current()->camera->get_translation().x;
 104   float scroll_y =
 105     Sector::current()->camera->get_translation().y;
 106   if (base.x < scroll_x ||
 107       base.x > scroll_x + screen->w ||
 108       base.y < scroll_y ||
 109       base.y > scroll_y + screen->h ||
 110       life_count <= 0)
 111     {
 112       remove_me();
 113     }
 114   if (issolid(base.x + 4, base.y + 2) ||
 115       issolid(base.x, base.y + 2))
 116      {
 117        if (kind == FIRE_BULLET)
 118          remove_me();
 119        else if (kind == ICE_BULLET)
 120          {
 121            physic.set_velocity_x(physic.get_velocity_x() * -1);
 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_HERRING) {
 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);
 213   if(kind == UPGRADE_GROWUP) {
 214     collision_swept_object_map(&old_base, &base);
 215   }
 216
 217   // fall down?
 218   if(kind == UPGRADE_GROWUP || kind == UPGRADE_HERRING) {
 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_HERRING) {
 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_HERRING) {
 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_HERRING: sprite = img_star; break;
 262     case UPGRADE_1UP: sprite = img_1up; break;
 263     default:
 264       assert(!"wrong type in Powerup::draw()");
 265   }
 266
 267   if(base.height < 32) // still raising up?
 268     sprite->draw(context, Vector(base.x, base.y + (32 - base.height)),
 269         LAYER_TILES - 10);
 270   else
 271     sprite->draw(context, Vector(base.x, base.y), LAYER_OBJECTS);
 272 }
 273
 274 void
 275 Upgrade::bump(Player* player)
 276 {
 277   // these can't be bumped
 278   if(kind != UPGRADE_GROWUP)
 279     return;
 280
 281   sound_manager->play_sound(sounds[SND_BUMP_UPGRADE], Vector(base.x, base.y));
 282
 283   // determine new direction
 284   Direction old_dir = dir;
 285   if (player->base.x + player->base.width/2 > base.x + base.width/2)
 286     dir = LEFT;
 287   else
 288     dir = RIGHT;
 289
 290   // do a little jump and change direction (if necessary)
 291   if (dir != old_dir)
 292     physic.set_velocity(-physic.get_velocity_x(), 3);
 293   else
 294     physic.set_velocity_y(3);
 295
 296   physic.enable_gravity(true);
 297 }
 298
 299 void
 300 Upgrade::collision(const MovingObject& , int)
 301 {
 302   // later
 303 }
 304
 305 void
 306 Upgrade::collision(void* p_c_object, int c_object, CollisionType type)
 307 {
 308   Player* pplayer = NULL;
 309
 310   if(type == COLLISION_BUMP) {
 311     if(c_object == CO_PLAYER)
 312       pplayer = (Player*) p_c_object;
 313     bump(pplayer);
 314     return;
 315   }
 316
 317   switch (c_object)
 318     {
 319     case CO_PLAYER:
 320       /* Remove the upgrade: */
 321
 322       /* p_c_object is CO_PLAYER, so assign it to pplayer */
 323       pplayer = (Player*) p_c_object;
 324
 325       /* Affect the player: */
 326
 327       if (kind == UPGRADE_GROWUP)
 328         {
 329           sound_manager->play_sound(sounds[SND_EXCELLENT]);
 330           pplayer->grow(true);
 331         }
 332       else if (kind == UPGRADE_FIREFLOWER)
 333         {
 334           sound_manager->play_sound(sounds[SND_COFFEE]);
 335           pplayer->grow(true);
 336           pplayer->got_power = pplayer->FIRE_POWER;
 337         }
 338       else if (kind == UPGRADE_ICEFLOWER)
 339         {
 340           sound_manager->play_sound(sounds[SND_COFFEE]);
 341           pplayer->grow(true);
 342           pplayer->got_power = pplayer->ICE_POWER;
 343         }
 344       else if (kind == UPGRADE_FIREFLOWER)
 345         {
 346           sound_manager->play_sound(sounds[SND_COFFEE]);
 347           pplayer->grow(true);
 348           pplayer->got_power = pplayer->FIRE_POWER;
 349         }
 350       else if (kind == UPGRADE_HERRING)
 351         {
 352           sound_manager->play_sound(sounds[SND_HERRING]);
 353           pplayer->invincible_timer.start(TUX_INVINCIBLE_TIME);
 354           Sector::current()->play_music(HERRING_MUSIC);
 355         }
 356       else if (kind == UPGRADE_1UP)
 357         {
 358           if(player_status.lives < MAX_LIVES) {
 359             player_status.lives++;
 360             sound_manager->play_sound(sounds[SND_LIFEUP]);
 361           }
 362         }
 363
 364       remove_me();
 365       return;
 366     }
 367 }
 368
 369 void load_special_gfx()
 370 {
 371   img_growup    = sprite_manager->load("egg");
 372   img_iceflower = sprite_manager->load("iceflower");
 373   img_fireflower = sprite_manager->load("fireflower");
 374   img_star      = sprite_manager->load("star");
 375   img_1up       = sprite_manager->load("1up");
 376
 377   img_firebullet = sprite_manager->load("firebullet");
 378   img_icebullet  = sprite_manager->load("icebullet");
 379 }
 380
 381 void free_special_gfx()
 382 {
 383 }
 384