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 "SDL.h"
  22 #include "defines.h"
  23 #include "special.h"
  24 #include "gameloop.h"
  25 #include "screen.h"
  26 #include "sound.h"
  27 #include "scene.h"
  28 #include "globals.h"
  29 #include "player.h"
  30 #include "sprite_manager.h"
  31 #include "resources.h"
  32
  33 Surface* img_bullet;
  34
  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 void
  43 Bullet::init(float x, float y, float xm, Direction dir)
  44 {
  45   base.width = 4;
  46   base.height = 4;
  47
  48   if (dir == RIGHT)
  49     {
  50       base.x = x + 32;
  51       base.xm = BULLET_XM + xm;
  52     }
  53   else
  54     {
  55       base.x = x;
  56       base.xm = -BULLET_XM + xm;
  57     }
  58
  59   base.y = y;
  60   base.ym = BULLET_STARTING_YM;
  61   old_base = base;
  62 }
  63
  64 void
  65 Bullet::remove_me()
  66 {
  67   std::vector<Bullet>& bullets = World::current()->bullets;
  68   for(std::vector<Bullet>::iterator i = bullets.begin();
  69          i != bullets.end(); ++i) {
  70     if( & (*i) == this) {
  71       bullets.erase(i);
  72       return;
  73     }
  74   }
  75
  76   assert(false);
  77 }
  78
  79 void
  80 Bullet::action(double frame_ratio)
  81 {
  82   base.x = base.x + base.xm * frame_ratio;
  83   base.y = base.y + base.ym * frame_ratio;
  84
  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.ym = -base.ym;
  90       base.y = (int)(base.y / 32) * 32;
  91     }
  92
  93   base.ym = base.ym + GRAVITY;
  94
  95   if (base.x < scroll_x ||
  96       base.x > scroll_x + screen->w ||
  97       base.y < 0 ||
  98       base.y > screen->h ||
  99       issolid(base.x + 4, base.y + 2) ||
 100       issolid(base.x, base.y + 2))
 101     {
 102       remove_me();
 103     }
 104
 105 }
 106
 107 void
 108 Bullet::draw()
 109 {
 110   if (base.x >= scroll_x - base.width &&
 111       base.x <= scroll_x + screen->w)
 112     {
 113       img_bullet->draw( base.x - scroll_x, base.y, 255,
 114                    NO_UPDATE);
 115     }
 116 }
 117
 118 void
 119 Bullet::collision(int c_object)
 120 {
 121   if(c_object == CO_BADGUY) {
 122     remove_me();
 123   }
 124 }
 125
 126 void
 127 Upgrade::init(float x_, float y_, Direction dir_, UpgradeKind kind_)
 128 {
 129   kind = kind_;
 130   dir = dir_;
 131
 132   base.width = 32;
 133   base.height = 0;
 134   base.x = x_;
 135   base.y = y_;
 136   old_base = base;
 137
 138   physic.reset();
 139   physic.enable_gravity(false);
 140
 141   if(kind == UPGRADE_1UP || kind == UPGRADE_HERRING) {
 142     physic.set_velocity(dir == LEFT ? -1 : 1, 4);
 143     physic.enable_gravity(true);
 144     base.height = 32;
 145   } else if (kind == UPGRADE_ICEFLOWER) {
 146     // nothing
 147   } else if (kind == UPGRADE_GROWUP) {
 148     physic.set_velocity(dir == LEFT ? -GROWUP_SPEED : GROWUP_SPEED, 0);
 149   } else {
 150     physic.set_velocity(dir == LEFT ? -2 : 2, 0);
 151   }
 152 }
 153
 154 void
 155 Upgrade::remove_me()
 156 {
 157   std::vector<Upgrade>& upgrades = World::current()->upgrades;
 158   for(std::vector<Upgrade>::iterator i = upgrades.begin();
 159          i != upgrades.end(); ++i) {
 160     if( & (*i) == this) {
 161       upgrades.erase(i);
 162       return;
 163     }
 164   }
 165
 166   assert(false);
 167 }
 168
 169 void
 170 Upgrade::action(double frame_ratio)
 171 {
 172   if (kind == UPGRADE_ICEFLOWER || kind == UPGRADE_GROWUP) {
 173     if (base.height < 32) {
 174       /* Rise up! */
 175       base.height = base.height + 0.7 * frame_ratio;
 176       if(base.height > 32)
 177         base.height = 32;
 178
 179       return;
 180     }
 181   }
 182
 183   /* Off screen? Kill it! */
 184   if(base.x < scroll_x - base.width || base.y > screen->h) {
 185     remove_me();
 186     return;
 187   }
 188
 189   /* Move around? */
 190   physic.apply(frame_ratio, base.x, base.y);
 191   if(kind == UPGRADE_GROWUP) {
 192     collision_swept_object_map(&old_base, &base);
 193   }
 194
 195   // fall down?
 196   if(kind == UPGRADE_GROWUP || kind == UPGRADE_HERRING) {
 197     // falling?
 198     if(physic.get_velocity_y() != 0) {
 199       if(issolid(base.x, base.y + base.height)) {
 200         base.y = int(base.y / 32) * 32;
 201         old_base = base;
 202         if(kind == UPGRADE_GROWUP) {
 203           physic.enable_gravity(false);
 204           physic.set_velocity(dir == LEFT ? -GROWUP_SPEED : GROWUP_SPEED, 0);
 205         } else if(kind == UPGRADE_HERRING) {
 206           physic.set_velocity(dir == LEFT ? -2 : 2, 3);
 207         }
 208       }
 209     } else {
 210       if((physic.get_velocity_x() < 0
 211             && !issolid(base.x+base.width, base.y + base.height))
 212         || (physic.get_velocity_x() > 0
 213             && !issolid(base.x, base.y + base.height))) {
 214         physic.enable_gravity(true);
 215       }
 216     }
 217   }
 218
 219   // horizontal bounce?
 220   if(kind == UPGRADE_GROWUP || kind == UPGRADE_HERRING) {
 221     if (  (physic.get_velocity_x() < 0
 222           && issolid(base.x, (int) base.y + base.height/2))
 223         ||  (physic.get_velocity_x() > 0
 224           && issolid(base.x + base.width, (int) base.y + base.height/2))) {
 225         physic.set_velocity(-physic.get_velocity_x(),physic.get_velocity_y());
 226         dir = dir == LEFT ? RIGHT : LEFT;
 227     }
 228   }
 229 }
 230
 231 void
 232 Upgrade::draw()
 233 {
 234   SDL_Rect dest;
 235   if (base.height < 32)
 236     {
 237       /* Rising up... */
 238
 239       dest.x = (int)(base.x - scroll_x);
 240       dest.y = (int)(base.y + 32 - base.height);
 241       dest.w = 32;
 242       dest.h = (int)base.height;
 243
 244       if (kind == UPGRADE_GROWUP)
 245         img_growup->draw_part(0,0,dest.x,dest.y,dest.w,dest.h);
 246       else if (kind == UPGRADE_ICEFLOWER)
 247         img_iceflower->draw_part(0,0,dest.x,dest.y,dest.w,dest.h);
 248       else if (kind == UPGRADE_HERRING)
 249         img_star->draw_part(0,0,dest.x,dest.y,dest.w,dest.h);
 250       else if (kind == UPGRADE_1UP)
 251         img_1up->draw_part( 0, 0, dest.x, dest.y, dest.w, dest.h);
 252     }
 253   else
 254     {
 255       if (kind == UPGRADE_GROWUP)
 256         {
 257           img_growup->draw(
 258                        base.x - scroll_x, base.y);
 259         }
 260       else if (kind == UPGRADE_ICEFLOWER)
 261         {
 262           img_iceflower->draw(
 263                        base.x - scroll_x, base.y);
 264         }
 265       else if (kind == UPGRADE_HERRING)
 266         {
 267           img_star->draw(
 268                        base.x - scroll_x, base.y);
 269         }
 270       else if (kind == UPGRADE_1UP)
 271         {
 272           img_1up->draw( base.x - scroll_x, base.y);
 273         }
 274     }
 275 }
 276
 277 void
 278 Upgrade::collision(void* p_c_object, int c_object)
 279 {
 280   Player* pplayer = NULL;
 281
 282   switch (c_object)
 283     {
 284     case CO_PLAYER:
 285       /* Remove the upgrade: */
 286
 287       /* p_c_object is CO_PLAYER, so assign it to pplayer */
 288       pplayer = (Player*) p_c_object;
 289
 290       /* Affect the player: */
 291
 292       if (kind == UPGRADE_GROWUP)
 293         {
 294           play_sound(sounds[SND_EXCELLENT], SOUND_CENTER_SPEAKER);
 295           pplayer->size = BIG;
 296           pplayer->base.height = 64;
 297           pplayer->base.y -= 32;
 298           if(collision_object_map(pplayer->base))
 299             {
 300               pplayer->base.height = 32;
 301               pplayer->base.y += 32;
 302               pplayer->duck = true;
 303             }
 304         }
 305       else if (kind == UPGRADE_ICEFLOWER)
 306         {
 307           play_sound(sounds[SND_COFFEE], SOUND_CENTER_SPEAKER);
 308           pplayer->got_coffee = true;
 309           pplayer->size = BIG;
 310           pplayer->base.height = 64;
 311           pplayer->base.y -= 32;
 312           if(collision_object_map(pplayer->base))
 313             {
 314               pplayer->base.height = 32;
 315               pplayer->base.y += 32;
 316               pplayer->duck = true;
 317             }
 318         }
 319       else if (kind == UPGRADE_HERRING)
 320         {
 321           play_sound(sounds[SND_HERRING], SOUND_CENTER_SPEAKER);
 322           pplayer->invincible_timer.start(TUX_INVINCIBLE_TIME);
 323           World::current()->play_music(HERRING_MUSIC);
 324         }
 325       else if (kind == UPGRADE_1UP)
 326         {
 327           if(player_status.lives < MAX_LIVES) {
 328             player_status.lives++;
 329             play_sound(sounds[SND_LIFEUP], SOUND_CENTER_SPEAKER);
 330           }
 331         }
 332
 333       remove_me();
 334       return;
 335     }
 336 }
 337
 338 void load_special_gfx()
 339 {
 340   img_growup    = sprite_manager->load("egg");
 341   img_iceflower = sprite_manager->load("iceflower");
 342   img_star      = sprite_manager->load("star");
 343   img_1up       = sprite_manager->load("1up");
 344
 345   img_bullet = new Surface(datadir + "/images/shared/bullet.png",
 346                            USE_ALPHA);
 347 }
 348
 349 void free_special_gfx()
 350 {
 351   delete img_bullet;
 352 }
 353