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+2, base.y + 4) || issolid(base.x+2, 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());
 122            //physic.set_velocity_y(-physic.get_velocity_y());
 123          }
 124      }
 125 }
 126
 127 void
 128 Bullet::draw(DrawingContext& context)
 129 {
 130   Sprite* sprite = kind == FIRE_BULLET ? img_firebullet : img_icebullet;
 131
 132   sprite->draw(context, Vector(base.x, base.y), LAYER_OBJECTS);
 133 }
 134
 135 void
 136 Bullet::collision(const MovingObject& , int)
 137 {
 138   // later
 139 }
 140
 141 void
 142 Bullet::collision(int c_object)
 143 {
 144   if(c_object == CO_BADGUY) {
 145     remove_me();
 146   }
 147 }
 148
 149 //---------------------------------------------------------------------------
 150
 151 Upgrade::Upgrade(const Vector& pos, Direction dir_, UpgradeKind kind_)
 152 {
 153   kind = kind_;
 154   dir = dir_;
 155
 156   base.width = 32;
 157   base.height = 0;
 158   base.x = pos.x;
 159   base.y = pos.y;
 160   old_base = base;
 161
 162   physic.reset();
 163   physic.enable_gravity(false);
 164
 165   if(kind == UPGRADE_1UP || kind == UPGRADE_HERRING) {
 166     physic.set_velocity(dir == LEFT ? -1 : 1, 4);
 167     physic.enable_gravity(true);
 168     base.height = 32;
 169   } else if (kind == UPGRADE_ICEFLOWER || kind == UPGRADE_FIREFLOWER) {
 170     // nothing
 171   } else if (kind == UPGRADE_GROWUP) {
 172     physic.set_velocity(dir == LEFT ? -GROWUP_SPEED : GROWUP_SPEED, 0);
 173   } else {
 174     physic.set_velocity(dir == LEFT ? -2 : 2, 0);
 175   }
 176 }
 177
 178 Upgrade::~Upgrade()
 179 {
 180 }
 181
 182 void
 183 Upgrade::action(float elapsed_time)
 184 {
 185   if (kind == UPGRADE_ICEFLOWER || kind == UPGRADE_FIREFLOWER
 186       || kind == UPGRADE_GROWUP) {
 187     if (base.height < 32) {
 188       /* Rise up! */
 189       base.height = base.height + 0.7 * elapsed_time;
 190       if(base.height > 32)
 191         base.height = 32;
 192
 193       return;
 194     }
 195   }
 196
 197   /* Away from the screen? Kill it! */
 198   float scroll_x =
 199     Sector::current()->camera->get_translation().x;
 200   float scroll_y =
 201     Sector::current()->camera->get_translation().y;
 202
 203   if(base.x < scroll_x - X_OFFSCREEN_DISTANCE ||
 204       base.x > scroll_x + screen->w + X_OFFSCREEN_DISTANCE ||
 205       base.y < scroll_y - Y_OFFSCREEN_DISTANCE ||
 206       base.y > scroll_y + screen->h + Y_OFFSCREEN_DISTANCE)
 207     {
 208     remove_me();
 209     return;
 210     }
 211
 212   /* Move around? */
 213   physic.apply(elapsed_time, base.x, base.y);
 214   if(kind == UPGRADE_GROWUP) {
 215     collision_swept_object_map(&old_base, &base);
 216   }
 217
 218   // fall down?
 219   if(kind == UPGRADE_GROWUP || kind == UPGRADE_HERRING) {
 220     // falling?
 221     if(physic.get_velocity_y() != 0) {
 222       if(issolid(base.x, base.y + base.height)) {
 223         base.y = int(base.y / 32) * 32;
 224         old_base = base;
 225         if(kind == UPGRADE_GROWUP) {
 226           physic.enable_gravity(false);
 227           physic.set_velocity(dir == LEFT ? -GROWUP_SPEED : GROWUP_SPEED, 0);
 228         } else if(kind == UPGRADE_HERRING) {
 229           physic.set_velocity(dir == LEFT ? -2 : 2, 3);
 230         }
 231       }
 232     } else {
 233       if((physic.get_velocity_x() < 0
 234             && !issolid(base.x+base.width, base.y + base.height))
 235         || (physic.get_velocity_x() > 0
 236             && !issolid(base.x, base.y + base.height))) {
 237         physic.enable_gravity(true);
 238       }
 239     }
 240   }
 241
 242   // horizontal bounce?
 243   if(kind == UPGRADE_GROWUP || kind == UPGRADE_HERRING) {
 244     if (  (physic.get_velocity_x() < 0
 245           && issolid(base.x, (int) base.y + base.height/2))
 246         ||  (physic.get_velocity_x() > 0
 247           && issolid(base.x + base.width, (int) base.y + base.height/2))) {
 248         physic.set_velocity(-physic.get_velocity_x(),physic.get_velocity_y());
 249         dir = dir == LEFT ? RIGHT : LEFT;
 250     }
 251   }
 252 }
 253
 254 void
 255 Upgrade::draw(DrawingContext& context)
 256 {
 257   Sprite* sprite;
 258   switch(kind) {
 259     case UPGRADE_GROWUP: sprite = img_growup; break;
 260     case UPGRADE_ICEFLOWER: sprite = img_iceflower; break;
 261     case UPGRADE_FIREFLOWER: sprite = img_fireflower; break;
 262     case UPGRADE_HERRING: sprite = img_star; break;
 263     case UPGRADE_1UP: sprite = img_1up; break;
 264     default:
 265       assert(!"wrong type in Powerup::draw()");
 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   sound_manager->play_sound(sounds[SND_BUMP_UPGRADE], Vector(base.x, base.y));
 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           sound_manager->play_sound(sounds[SND_EXCELLENT]);
 331           pplayer->grow(true);
 332         }
 333       else if (kind == UPGRADE_FIREFLOWER)
 334         {
 335           sound_manager->play_sound(sounds[SND_COFFEE]);
 336           pplayer->grow(true);
 337           pplayer->got_power = pplayer->FIRE_POWER;
 338         }
 339       else if (kind == UPGRADE_ICEFLOWER)
 340         {
 341           sound_manager->play_sound(sounds[SND_COFFEE]);
 342           pplayer->grow(true);
 343           pplayer->got_power = pplayer->ICE_POWER;
 344         }
 345       else if (kind == UPGRADE_FIREFLOWER)
 346         {
 347           sound_manager->play_sound(sounds[SND_COFFEE]);
 348           pplayer->grow(true);
 349           pplayer->got_power = pplayer->FIRE_POWER;
 350         }
 351       else if (kind == UPGRADE_HERRING)
 352         {
 353           sound_manager->play_sound(sounds[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             sound_manager->play_sound(sounds[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