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_bullet;
  35 Sprite* img_star;
  36 Sprite* img_growup;
  37 Sprite* img_iceflower;
  38 Sprite* img_1up;
  39
  40 #define GROWUP_SPEED 1.0f
  41
  42 #define BULLET_STARTING_YM 0
  43 #define BULLET_XM 6
  44
  45 void
  46 Bullet::init(float x, float y, float xm, Direction dir)
  47 {
  48   base.width = 4;
  49   base.height = 4;
  50
  51   if (dir == RIGHT)
  52     {
  53       base.x = x + 32;
  54       base.xm = BULLET_XM + xm;
  55     }
  56   else
  57     {
  58       base.x = x;
  59       base.xm = -BULLET_XM + xm;
  60     }
  61
  62   base.y = y;
  63   base.ym = BULLET_STARTING_YM;
  64   old_base = base;
  65 }
  66
  67 void
  68 Bullet::remove_me()
  69 {
  70   std::vector<Bullet>& bullets = World::current()->bullets;
  71   for(std::vector<Bullet>::iterator i = bullets.begin();
  72          i != bullets.end(); ++i) {
  73     if( & (*i) == this) {
  74       bullets.erase(i);
  75       return;
  76     }
  77   }
  78
  79   assert(false);
  80 }
  81
  82 void
  83 Bullet::action(double frame_ratio)
  84 {
  85   frame_ratio *= 0.5f;
  86
  87   float old_y = base.y;
  88
  89   base.x = base.x + base.xm * frame_ratio;
  90   base.y = base.y + base.ym * frame_ratio;
  91
  92   collision_swept_object_map(&old_base,&base);
  93
  94   if (issolid(base.x, base.y + 4) || issolid(base.x, base.y))
  95     {
  96       base.y  = old_y;
  97       base.ym = -base.ym;
  98       if (base.ym > 13)
  99         base.ym = 13;
 100       else if (base.ym < -13)
 101         base.ym = -13;
 102     }
 103
 104   base.ym = base.ym + 0.5 * frame_ratio;
 105
 106   if (base.x < scroll_x ||
 107       base.x > scroll_x + screen->w ||
 108       base.y < 0 ||
 109       base.y > screen->h ||
 110       issolid(base.x + 4, base.y + 2) ||
 111       issolid(base.x, base.y + 2))
 112     {
 113       remove_me();
 114     }
 115
 116 }
 117
 118 void
 119 Bullet::draw()
 120 {
 121   if (base.x >= scroll_x - base.width &&
 122       base.x <= scroll_x + screen->w)
 123     {
 124       img_bullet->draw(base.x - scroll_x, base.y);
 125     }
 126 }
 127
 128 void
 129 Bullet::collision(int c_object)
 130 {
 131   if(c_object == CO_BADGUY) {
 132     remove_me();
 133   }
 134 }
 135
 136 void
 137 Upgrade::init(float x_, float y_, Direction dir_, UpgradeKind kind_)
 138 {
 139   kind = kind_;
 140   dir = dir_;
 141
 142   base.width = 32;
 143   base.height = 0;
 144   base.x = x_;
 145   base.y = y_;
 146   old_base = base;
 147
 148   physic.reset();
 149   physic.enable_gravity(false);
 150
 151   if(kind == UPGRADE_1UP || kind == UPGRADE_HERRING) {
 152     physic.set_velocity(dir == LEFT ? -1 : 1, 4);
 153     physic.enable_gravity(true);
 154     base.height = 32;
 155   } else if (kind == UPGRADE_ICEFLOWER) {
 156     // nothing
 157   } else if (kind == UPGRADE_GROWUP) {
 158     physic.set_velocity(dir == LEFT ? -GROWUP_SPEED : GROWUP_SPEED, 0);
 159   } else {
 160     physic.set_velocity(dir == LEFT ? -2 : 2, 0);
 161   }
 162 }
 163
 164 void
 165 Upgrade::remove_me()
 166 {
 167   std::vector<Upgrade>& upgrades = World::current()->upgrades;
 168   for(std::vector<Upgrade>::iterator i = upgrades.begin();
 169          i != upgrades.end(); ++i) {
 170     if( & (*i) == this) {
 171       upgrades.erase(i);
 172       return;
 173     }
 174   }
 175
 176   assert(false);
 177 }
 178
 179 void
 180 Upgrade::action(double frame_ratio)
 181 {
 182   if (kind == UPGRADE_ICEFLOWER || kind == UPGRADE_GROWUP) {
 183     if (base.height < 32) {
 184       /* Rise up! */
 185       base.height = base.height + 0.7 * frame_ratio;
 186       if(base.height > 32)
 187         base.height = 32;
 188
 189       return;
 190     }
 191   }
 192
 193   /* Off screen? Kill it! */
 194   if(base.x < scroll_x - base.width || base.y > screen->h) {
 195     remove_me();
 196     return;
 197   }
 198
 199   /* Move around? */
 200   physic.apply(frame_ratio, base.x, base.y);
 201   if(kind == UPGRADE_GROWUP) {
 202     collision_swept_object_map(&old_base, &base);
 203   }
 204
 205   // fall down?
 206   if(kind == UPGRADE_GROWUP || kind == UPGRADE_HERRING) {
 207     // falling?
 208     if(physic.get_velocity_y() != 0) {
 209       if(issolid(base.x, base.y + base.height)) {
 210         base.y = int(base.y / 32) * 32;
 211         old_base = base;
 212         if(kind == UPGRADE_GROWUP) {
 213           physic.enable_gravity(false);
 214           physic.set_velocity(dir == LEFT ? -GROWUP_SPEED : GROWUP_SPEED, 0);
 215         } else if(kind == UPGRADE_HERRING) {
 216           physic.set_velocity(dir == LEFT ? -2 : 2, 3);
 217         }
 218       }
 219     } else {
 220       if((physic.get_velocity_x() < 0
 221             && !issolid(base.x+base.width, base.y + base.height))
 222         || (physic.get_velocity_x() > 0
 223             && !issolid(base.x, base.y + base.height))) {
 224         physic.enable_gravity(true);
 225       }
 226     }
 227   }
 228
 229   // horizontal bounce?
 230   if(kind == UPGRADE_GROWUP || kind == UPGRADE_HERRING) {
 231     if (  (physic.get_velocity_x() < 0
 232           && issolid(base.x, (int) base.y + base.height/2))
 233         ||  (physic.get_velocity_x() > 0
 234           && issolid(base.x + base.width, (int) base.y + base.height/2))) {
 235         physic.set_velocity(-physic.get_velocity_x(),physic.get_velocity_y());
 236         dir = dir == LEFT ? RIGHT : LEFT;
 237     }
 238   }
 239 }
 240
 241 void
 242 Upgrade::draw()
 243 {
 244   SDL_Rect dest;
 245   if (base.height < 32)
 246     {
 247       /* Rising up... */
 248
 249       dest.x = (int)(base.x - scroll_x);
 250       dest.y = (int)(base.y + 32 - base.height);
 251       dest.w = 32;
 252       dest.h = (int)base.height;
 253
 254       if (kind == UPGRADE_GROWUP)
 255         img_growup->draw_part(0,0,dest.x,dest.y,dest.w,dest.h);
 256       else if (kind == UPGRADE_ICEFLOWER)
 257         img_iceflower->draw_part(0,0,dest.x,dest.y,dest.w,dest.h);
 258       else if (kind == UPGRADE_HERRING)
 259         img_star->draw_part(0,0,dest.x,dest.y,dest.w,dest.h);
 260       else if (kind == UPGRADE_1UP)
 261         img_1up->draw_part( 0, 0, dest.x, dest.y, dest.w, dest.h);
 262     }
 263   else
 264     {
 265       if (kind == UPGRADE_GROWUP)
 266         {
 267           img_growup->draw(
 268                        base.x - scroll_x, base.y);
 269         }
 270       else if (kind == UPGRADE_ICEFLOWER)
 271         {
 272           img_iceflower->draw(
 273                        base.x - scroll_x, base.y);
 274         }
 275       else if (kind == UPGRADE_HERRING)
 276         {
 277           img_star->draw(
 278                        base.x - scroll_x, base.y);
 279         }
 280       else if (kind == UPGRADE_1UP)
 281         {
 282           img_1up->draw( base.x - scroll_x, base.y);
 283         }
 284     }
 285 }
 286
 287 void
 288 Upgrade::collision(void* p_c_object, int c_object)
 289 {
 290   Player* pplayer = NULL;
 291
 292   switch (c_object)
 293     {
 294     case CO_PLAYER:
 295       /* Remove the upgrade: */
 296
 297       /* p_c_object is CO_PLAYER, so assign it to pplayer */
 298       pplayer = (Player*) p_c_object;
 299
 300       /* Affect the player: */
 301
 302       if (kind == UPGRADE_GROWUP)
 303         {
 304           play_sound(sounds[SND_EXCELLENT], SOUND_CENTER_SPEAKER);
 305           pplayer->size = BIG;
 306           pplayer->base.height = 64;
 307           pplayer->base.y -= 32;
 308           if(collision_object_map(pplayer->base))
 309             {
 310               pplayer->base.height = 32;
 311               pplayer->base.y += 32;
 312               pplayer->duck = true;
 313             }
 314         }
 315       else if (kind == UPGRADE_ICEFLOWER)
 316         {
 317           play_sound(sounds[SND_COFFEE], SOUND_CENTER_SPEAKER);
 318           pplayer->got_coffee = true;
 319           pplayer->size = BIG;
 320           pplayer->base.height = 64;
 321           pplayer->base.y -= 32;
 322           if(collision_object_map(pplayer->base))
 323             {
 324               pplayer->base.height = 32;
 325               pplayer->base.y += 32;
 326               pplayer->duck = true;
 327             }
 328         }
 329       else if (kind == UPGRADE_HERRING)
 330         {
 331           play_sound(sounds[SND_HERRING], SOUND_CENTER_SPEAKER);
 332           pplayer->invincible_timer.start(TUX_INVINCIBLE_TIME);
 333           World::current()->play_music(HERRING_MUSIC);
 334         }
 335       else if (kind == UPGRADE_1UP)
 336         {
 337           if(player_status.lives < MAX_LIVES) {
 338             player_status.lives++;
 339             play_sound(sounds[SND_LIFEUP], SOUND_CENTER_SPEAKER);
 340           }
 341         }
 342
 343       remove_me();
 344       return;
 345     }
 346 }
 347
 348 void load_special_gfx()
 349 {
 350   img_growup    = sprite_manager->load("egg");
 351   img_iceflower = sprite_manager->load("iceflower");
 352   img_star      = sprite_manager->load("star");
 353   img_1up       = sprite_manager->load("1up");
 354
 355   img_bullet    = sprite_manager->load("bullet");
 356 }
 357
 358 void free_special_gfx()
 359 {
 360   delete img_bullet;
 361 }
 362