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 <assert.h>
  21 #include <iostream>
  22 #include "SDL.h"
  23 #include "defines.h"
  24 #include "special.h"
  25 #include "gameloop.h"
  26 #include "screen.h"
  27 #include "sound.h"
  28 #include "scene.h"
  29 #include "globals.h"
  30 #include "player.h"
  31 #include "sprite_manager.h"
  32 #include "resources.h"
  33
  34 Sprite* img_firebullet;
  35 Sprite* img_icebullet;
  36 Sprite* img_star;
  37 Sprite* img_growup;
  38 Sprite* img_iceflower;
  39 Sprite* img_1up;
  40
  41 #define GROWUP_SPEED 1.0f
  42
  43 #define BULLET_STARTING_YM 0
  44 #define BULLET_XM 6
  45
  46 void
  47 Bullet::init(float x, float y, float xm, Direction dir, int kind_)
  48 {
  49   life_count = 3;
  50   base.width = 4;
  51   base.height = 4;
  52
  53   if (dir == RIGHT)
  54     {
  55       base.x = x + 32;
  56       base.xm = BULLET_XM + xm;
  57     }
  58   else
  59     {
  60       base.x = x;
  61       base.xm = -BULLET_XM + xm;
  62     }
  63
  64   base.y = y;
  65   base.ym = BULLET_STARTING_YM;
  66   old_base = base;
  67   kind = kind_;
  68 }
  69
  70 void
  71 Bullet::remove_me()
  72 {
  73   std::vector<Bullet>& bullets = World::current()->bullets;
  74   for(std::vector<Bullet>::iterator i = bullets.begin();
  75          i != bullets.end(); ++i) {
  76     if( & (*i) == this) {
  77       bullets.erase(i);
  78       return;
  79     }
  80   }
  81
  82   assert(false);
  83 }
  84
  85 void
  86 Bullet::action(double frame_ratio)
  87 {
  88   frame_ratio *= 0.5f;
  89
  90   float old_y = base.y;
  91
  92   base.x = base.x + base.xm * frame_ratio;
  93   base.y = base.y + base.ym * frame_ratio;
  94
  95   collision_swept_object_map(&old_base,&base);
  96
  97   if (issolid(base.x, base.y + 4) || issolid(base.x, base.y))
  98     {
  99       base.y  = old_y;
 100       base.ym = -base.ym;
 101       if (base.ym > 9)
 102         base.ym = 9;
 103       else if (base.ym < -9)
 104         base.ym = -9;
 105       life_count -= 1;
 106     }
 107
 108   if(kind == FIRE_BULLET)
 109     base.ym = base.ym + 0.5 * frame_ratio;
 110   else if(kind == FIRE_BULLET)
 111     base.ym = 0;
 112
 113   if (base.x < scroll_x ||
 114       base.x > scroll_x + screen->w ||
 115       base.y > screen->h ||
 116       issolid(base.x + 4, base.y + 2) ||
 117       issolid(base.x, base.y + 2) ||
 118       life_count <= 0)
 119     {
 120       remove_me();
 121     }
 122
 123 }
 124
 125 void
 126 Bullet::draw()
 127 {
 128   if (base.x >= scroll_x - base.width &&
 129       base.x <= scroll_x + screen->w)
 130     {
 131       if(kind == FIRE_BULLET)
 132         img_firebullet->draw(base.x, base.y);
 133       else if(kind == FIRE_BULLET)
 134         img_icebullet->draw(base.x, base.y);
 135     }
 136 }
 137
 138 void
 139 Bullet::collision(int c_object)
 140 {
 141   if(c_object == CO_BADGUY) {
 142     remove_me();
 143   }
 144 }
 145
 146 void
 147 Upgrade::init(float x_, float y_, Direction dir_, UpgradeKind kind_)
 148 {
 149   kind = kind_;
 150   dir = dir_;
 151
 152   base.width = 32;
 153   base.height = 0;
 154   base.x = x_;
 155   base.y = y_;
 156   old_base = base;
 157
 158   physic.reset();
 159   physic.enable_gravity(false);
 160
 161   if(kind == UPGRADE_1UP || kind == UPGRADE_HERRING) {
 162     physic.set_velocity(dir == LEFT ? -1 : 1, 4);
 163     physic.enable_gravity(true);
 164     base.height = 32;
 165   } else if (kind == UPGRADE_ICEFLOWER) {
 166     // nothing
 167   } else if (kind == UPGRADE_GROWUP) {
 168     physic.set_velocity(dir == LEFT ? -GROWUP_SPEED : GROWUP_SPEED, 0);
 169   } else {
 170     physic.set_velocity(dir == LEFT ? -2 : 2, 0);
 171   }
 172 }
 173
 174 void
 175 Upgrade::remove_me()
 176 {
 177   std::vector<Upgrade>& upgrades = World::current()->upgrades;
 178   for(std::vector<Upgrade>::iterator i = upgrades.begin();
 179          i != upgrades.end(); ++i) {
 180     if( & (*i) == this) {
 181       upgrades.erase(i);
 182       return;
 183     }
 184   }
 185
 186   assert(false);
 187 }
 188
 189 void
 190 Upgrade::action(double frame_ratio)
 191 {
 192   if (kind == UPGRADE_ICEFLOWER || kind == UPGRADE_GROWUP) {
 193     if (base.height < 32) {
 194       /* Rise up! */
 195       base.height = base.height + 0.7 * frame_ratio;
 196       if(base.height > 32)
 197         base.height = 32;
 198
 199       return;
 200     }
 201   }
 202
 203   /* Away from the screen? Kill it! */
 204   if(base.x < scroll_x - OFFSCREEN_DISTANCE) {
 205       remove_me();
 206       return;
 207   }
 208   if(base.y > screen->h) {
 209     remove_me();
 210     return;
 211   }
 212
 213   /* Move around? */
 214   physic.apply(frame_ratio, base.x, base.y);
 215   if(kind == UPGRADE_GROWUP) {
 216     collision_swept_object_map(&old_base, &base);
 217   }
 218
 219   // fall down?
 220   if(kind == UPGRADE_GROWUP || kind == UPGRADE_HERRING) {
 221     // falling?
 222     if(physic.get_velocity_y() != 0) {
 223       if(issolid(base.x, base.y + base.height)) {
 224         base.y = int(base.y / 32) * 32;
 225         old_base = base;
 226         if(kind == UPGRADE_GROWUP) {
 227           physic.enable_gravity(false);
 228           physic.set_velocity(dir == LEFT ? -GROWUP_SPEED : GROWUP_SPEED, 0);
 229         } else if(kind == UPGRADE_HERRING) {
 230           physic.set_velocity(dir == LEFT ? -2 : 2, 3);
 231         }
 232       }
 233     } else {
 234       if((physic.get_velocity_x() < 0
 235             && !issolid(base.x+base.width, base.y + base.height))
 236         || (physic.get_velocity_x() > 0
 237             && !issolid(base.x, base.y + base.height))) {
 238         physic.enable_gravity(true);
 239       }
 240     }
 241   }
 242
 243   // horizontal bounce?
 244   if(kind == UPGRADE_GROWUP || kind == UPGRADE_HERRING) {
 245     if (  (physic.get_velocity_x() < 0
 246           && issolid(base.x, (int) base.y + base.height/2))
 247         ||  (physic.get_velocity_x() > 0
 248           && issolid(base.x + base.width, (int) base.y + base.height/2))) {
 249         physic.set_velocity(-physic.get_velocity_x(),physic.get_velocity_y());
 250         dir = dir == LEFT ? RIGHT : LEFT;
 251     }
 252   }
 253 }
 254
 255 void
 256 Upgrade::draw()
 257 {
 258   SDL_Rect dest;
 259
 260   if (base.height < 32)
 261     {
 262       /* Rising up... */
 263
 264       dest.x = (int)(base.x);
 265       dest.y = (int)(base.y + 32 - base.height);
 266       dest.w = 32;
 267       dest.h = (int)base.height;
 268
 269       if (kind == UPGRADE_GROWUP)
 270         img_growup->draw_part(0,0,dest.x,dest.y,dest.w,dest.h);
 271       else if (kind == UPGRADE_ICEFLOWER)
 272         img_iceflower->draw_part(0,0,dest.x,dest.y,dest.w,dest.h);
 273       else if (kind == UPGRADE_HERRING)
 274         img_star->draw_part(0,0,dest.x,dest.y,dest.w,dest.h);
 275       else if (kind == UPGRADE_1UP)
 276         img_1up->draw_part( 0, 0, dest.x, dest.y, dest.w, dest.h);
 277     }
 278   else
 279     {
 280       if (kind == UPGRADE_GROWUP)
 281         {
 282           img_growup->draw(
 283                        base.x, base.y);
 284         }
 285       else if (kind == UPGRADE_ICEFLOWER)
 286         {
 287           img_iceflower->draw(
 288                        base.x, base.y);
 289         }
 290       else if (kind == UPGRADE_HERRING)
 291         {
 292           img_star->draw(
 293                        base.x, base.y);
 294         }
 295       else if (kind == UPGRADE_1UP)
 296         {
 297           img_1up->draw( base.x, base.y);
 298         }
 299     }
 300 }
 301
 302 void
 303 Upgrade::bump(Player* )
 304 {
 305   // these can't be bumped
 306   if(kind != UPGRADE_GROWUP)
 307     return;
 308
 309   play_sound(sounds[SND_BUMP_UPGRADE], SOUND_CENTER_SPEAKER);
 310
 311   // do a little jump and change direction
 312   physic.set_velocity(-physic.get_velocity_x(), 3);
 313   dir = dir == LEFT ? RIGHT : LEFT;
 314   physic.enable_gravity(true);
 315 }
 316
 317 void
 318 Upgrade::collision(void* p_c_object, int c_object, CollisionType type)
 319 {
 320   Player* pplayer = NULL;
 321
 322   if(type == COLLISION_BUMP) {
 323     if(c_object == CO_PLAYER)
 324       pplayer = (Player*) p_c_object;
 325     bump(pplayer);
 326     return;
 327   }
 328
 329   switch (c_object)
 330     {
 331     case CO_PLAYER:
 332       /* Remove the upgrade: */
 333
 334       /* p_c_object is CO_PLAYER, so assign it to pplayer */
 335       pplayer = (Player*) p_c_object;
 336
 337       /* Affect the player: */
 338
 339       if (kind == UPGRADE_GROWUP)
 340         {
 341           play_sound(sounds[SND_EXCELLENT], SOUND_CENTER_SPEAKER);
 342           pplayer->grow();
 343         }
 344       else if (kind == UPGRADE_FIREFLOWER)
 345         {
 346           play_sound(sounds[SND_COFFEE], SOUND_CENTER_SPEAKER);
 347           pplayer->grow();
 348           pplayer->got_power = pplayer->FIRE_POWER;
 349         }
 350       else if (kind == UPGRADE_ICEFLOWER)
 351         {
 352           play_sound(sounds[SND_COFFEE], SOUND_CENTER_SPEAKER);
 353           pplayer->grow();
 354           pplayer->got_power = pplayer->ICE_POWER;
 355         }
 356       else if (kind == UPGRADE_HERRING)
 357         {
 358           play_sound(sounds[SND_HERRING], SOUND_CENTER_SPEAKER);
 359           pplayer->invincible_timer.start(TUX_INVINCIBLE_TIME);
 360           World::current()->play_music(HERRING_MUSIC);
 361         }
 362       else if (kind == UPGRADE_1UP)
 363         {
 364           if(player_status.lives < MAX_LIVES) {
 365             player_status.lives++;
 366             play_sound(sounds[SND_LIFEUP], SOUND_CENTER_SPEAKER);
 367           }
 368         }
 369
 370       remove_me();
 371       return;
 372     }
 373 }
 374
 375 void load_special_gfx()
 376 {
 377   img_growup    = sprite_manager->load("egg");
 378   img_iceflower = sprite_manager->load("iceflower");
 379   img_star      = sprite_manager->load("star");
 380   img_1up       = sprite_manager->load("1up");
 381
 382   img_firebullet    = sprite_manager->load("firebullet");
 383   img_icebullet    = sprite_manager->load("icebullet");
 384 }
 385
 386 void free_special_gfx()
 387 {
 388 }
 389