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