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_fireflower;
  40 Sprite* img_1up;
  41
  42 #define GROWUP_SPEED 1.0f
  43
  44 #define BULLET_STARTING_YM 0
  45 #define BULLET_XM 6
  46
  47 void
  48 Bullet::init(float x, float y, float xm, Direction dir, int kind_)
  49 {
  50   life_count = 3;
  51   base.width = 4;
  52   base.height = 4;
  53
  54   if (dir == RIGHT)
  55     {
  56       base.x = x + 32;
  57       base.xm = BULLET_XM + xm;
  58     }
  59   else
  60     {
  61       base.x = x;
  62       base.xm = -BULLET_XM + xm;
  63     }
  64
  65   base.y = y;
  66   base.ym = BULLET_STARTING_YM;
  67   old_base = base;
  68   kind = kind_;
  69 }
  70
  71 void
  72 Bullet::remove_me()
  73 {
  74   std::vector<Bullet>& bullets = World::current()->bullets;
  75   for(std::vector<Bullet>::iterator i = bullets.begin();
  76          i != bullets.end(); ++i) {
  77     if( & (*i) == this) {
  78       bullets.erase(i);
  79       return;
  80     }
  81   }
  82
  83   assert(false);
  84 }
  85
  86 void
  87 Bullet::action(double frame_ratio)
  88 {
  89   frame_ratio *= 0.5f;
  90
  91   float old_y = base.y;
  92
  93   base.x = base.x + base.xm * frame_ratio;
  94   base.y = base.y + base.ym * frame_ratio;
  95
  96   collision_swept_object_map(&old_base,&base);
  97
  98   if (issolid(base.x, base.y + 4) || issolid(base.x, base.y))
  99     {
 100       base.y  = old_y;
 101       base.ym = -base.ym;
 102       if (base.ym > 9)
 103         base.ym = 9;
 104       else if (base.ym < -9)
 105         base.ym = -9;
 106       life_count -= 1;
 107     }
 108
 109   if(kind == FIRE_BULLET)
 110     base.ym = base.ym + 0.5 * frame_ratio;
 111   else if(kind == ICE_BULLET)
 112     base.ym = 0;
 113
 114   if (base.x < scroll_x ||
 115       base.x > scroll_x + screen->w ||
 116       base.y > screen->h ||
 117       issolid(base.x + 4, base.y + 2) ||
 118       issolid(base.x, base.y + 2) ||
 119       life_count <= 0)
 120     {
 121       remove_me();
 122     }
 123
 124 }
 125
 126 void
 127 Bullet::draw()
 128 {
 129   if (base.x >= scroll_x - base.width &&
 130       base.x <= scroll_x + screen->w)
 131     {
 132       if(kind == FIRE_BULLET)
 133         img_firebullet->draw(base.x, base.y);
 134       else if(kind == ICE_BULLET)
 135         img_icebullet->draw(base.x, base.y);
 136     }
 137 }
 138
 139 void
 140 Bullet::collision(int c_object)
 141 {
 142   if(c_object == CO_BADGUY) {
 143     remove_me();
 144   }
 145 }
 146
 147 void
 148 Upgrade::init(float x_, float y_, Direction dir_, UpgradeKind kind_)
 149 {
 150   kind = kind_;
 151   dir = dir_;
 152
 153   base.width = 32;
 154   base.height = 0;
 155   base.x = x_;
 156   base.y = y_;
 157   old_base = base;
 158
 159   physic.reset();
 160   physic.enable_gravity(false);
 161
 162   if(kind == UPGRADE_1UP || kind == UPGRADE_HERRING) {
 163     physic.set_velocity(dir == LEFT ? -1 : 1, 4);
 164     physic.enable_gravity(true);
 165     base.height = 32;
 166   } else if (kind == UPGRADE_ICEFLOWER || kind == UPGRADE_FIREFLOWER) {
 167     // nothing
 168   } else if (kind == UPGRADE_GROWUP) {
 169     physic.set_velocity(dir == LEFT ? -GROWUP_SPEED : GROWUP_SPEED, 0);
 170   } else {
 171     physic.set_velocity(dir == LEFT ? -2 : 2, 0);
 172   }
 173 }
 174
 175 void
 176 Upgrade::remove_me()
 177 {
 178   std::vector<Upgrade>& upgrades = World::current()->upgrades;
 179   for(std::vector<Upgrade>::iterator i = upgrades.begin();
 180          i != upgrades.end(); ++i) {
 181     if( & (*i) == this) {
 182       upgrades.erase(i);
 183       return;
 184     }
 185   }
 186
 187   assert(false);
 188 }
 189
 190 void
 191 Upgrade::action(double frame_ratio)
 192 {
 193   if (kind == UPGRADE_ICEFLOWER || kind == UPGRADE_FIREFLOWER
 194       || kind == UPGRADE_GROWUP) {
 195     if (base.height < 32) {
 196       /* Rise up! */
 197       base.height = base.height + 0.7 * frame_ratio;
 198       if(base.height > 32)
 199         base.height = 32;
 200
 201       return;
 202     }
 203   }
 204
 205   /* Away from the screen? Kill it! */
 206   if(base.x < scroll_x - OFFSCREEN_DISTANCE) {
 207       remove_me();
 208       return;
 209   }
 210   if(base.y > screen->h) {
 211     remove_me();
 212     return;
 213   }
 214
 215   /* Move around? */
 216   physic.apply(frame_ratio, base.x, base.y);
 217   if(kind == UPGRADE_GROWUP) {
 218     collision_swept_object_map(&old_base, &base);
 219   }
 220
 221   // fall down?
 222   if(kind == UPGRADE_GROWUP || kind == UPGRADE_HERRING) {
 223     // falling?
 224     if(physic.get_velocity_y() != 0) {
 225       if(issolid(base.x, base.y + base.height)) {
 226         base.y = int(base.y / 32) * 32;
 227         old_base = base;
 228         if(kind == UPGRADE_GROWUP) {
 229           physic.enable_gravity(false);
 230           physic.set_velocity(dir == LEFT ? -GROWUP_SPEED : GROWUP_SPEED, 0);
 231         } else if(kind == UPGRADE_HERRING) {
 232           physic.set_velocity(dir == LEFT ? -2 : 2, 3);
 233         }
 234       }
 235     } else {
 236       if((physic.get_velocity_x() < 0
 237             && !issolid(base.x+base.width, base.y + base.height))
 238         || (physic.get_velocity_x() > 0
 239             && !issolid(base.x, base.y + base.height))) {
 240         physic.enable_gravity(true);
 241       }
 242     }
 243   }
 244
 245   // horizontal bounce?
 246   if(kind == UPGRADE_GROWUP || kind == UPGRADE_HERRING) {
 247     if (  (physic.get_velocity_x() < 0
 248           && issolid(base.x, (int) base.y + base.height/2))
 249         ||  (physic.get_velocity_x() > 0
 250           && issolid(base.x + base.width, (int) base.y + base.height/2))) {
 251         physic.set_velocity(-physic.get_velocity_x(),physic.get_velocity_y());
 252         dir = dir == LEFT ? RIGHT : LEFT;
 253     }
 254   }
 255 }
 256
 257 void
 258 Upgrade::draw()
 259 {
 260   SDL_Rect dest;
 261
 262   if (base.height < 32)
 263     {
 264       /* Rising up... */
 265
 266       dest.x = (int)(base.x);
 267       dest.y = (int)(base.y + 32 - base.height);
 268       dest.w = 32;
 269       dest.h = (int)base.height;
 270
 271       if (kind == UPGRADE_GROWUP)
 272         img_growup->draw_part(0,0,dest.x,dest.y,dest.w,dest.h);
 273       else if (kind == UPGRADE_ICEFLOWER)
 274         img_iceflower->draw_part(0,0,dest.x,dest.y,dest.w,dest.h);
 275       else if (kind == UPGRADE_FIREFLOWER)
 276         img_fireflower->draw_part(0,0,dest.x,dest.y,dest.w,dest.h);
 277       else if (kind == UPGRADE_HERRING)
 278         img_star->draw_part(0,0,dest.x,dest.y,dest.w,dest.h);
 279       else if (kind == UPGRADE_1UP)
 280         img_1up->draw_part( 0, 0, dest.x, dest.y, dest.w, dest.h);
 281     }
 282   else
 283     {
 284       if (kind == UPGRADE_GROWUP)
 285         {
 286           img_growup->draw(
 287                        base.x, base.y);
 288         }
 289       else if (kind == UPGRADE_ICEFLOWER)
 290         {
 291           img_iceflower->draw(
 292                        base.x, base.y);
 293         }
 294       else if (kind == UPGRADE_FIREFLOWER)
 295         {
 296           img_fireflower->draw(
 297                        base.x, base.y);
 298         }
 299       else if (kind == UPGRADE_HERRING)
 300         {
 301           img_star->draw(
 302                        base.x, base.y);
 303         }
 304       else if (kind == UPGRADE_1UP)
 305         {
 306           img_1up->draw( base.x, base.y);
 307         }
 308     }
 309 }
 310
 311 void
 312 Upgrade::bump(Player* player)
 313 {
 314   // these can't be bumped
 315   if(kind != UPGRADE_GROWUP)
 316     return;
 317
 318   play_sound(sounds[SND_BUMP_UPGRADE], SOUND_CENTER_SPEAKER);
 319
 320   // determine new direction
 321   if (player->base.x + player->base.width/2 > base.x + base.width/2)
 322     dir = LEFT;
 323   else
 324     dir = RIGHT;
 325
 326   // do a little jump and change direction
 327   physic.set_velocity(-physic.get_velocity_x(), 3);
 328   physic.enable_gravity(true);
 329 }
 330
 331 void
 332 Upgrade::collision(void* p_c_object, int c_object, CollisionType type)
 333 {
 334   Player* pplayer = NULL;
 335
 336   if(type == COLLISION_BUMP) {
 337     if(c_object == CO_PLAYER)
 338       pplayer = (Player*) p_c_object;
 339     bump(pplayer);
 340     return;
 341   }
 342
 343   switch (c_object)
 344     {
 345     case CO_PLAYER:
 346       /* Remove the upgrade: */
 347
 348       /* p_c_object is CO_PLAYER, so assign it to pplayer */
 349       pplayer = (Player*) p_c_object;
 350
 351       /* Affect the player: */
 352
 353       if (kind == UPGRADE_GROWUP)
 354         {
 355           play_sound(sounds[SND_EXCELLENT], SOUND_CENTER_SPEAKER);
 356           pplayer->grow();
 357         }
 358       else if (kind == UPGRADE_FIREFLOWER)
 359         {
 360           play_sound(sounds[SND_COFFEE], SOUND_CENTER_SPEAKER);
 361           pplayer->grow();
 362           pplayer->got_power = pplayer->FIRE_POWER;
 363         }
 364       else if (kind == UPGRADE_ICEFLOWER)
 365         {
 366           play_sound(sounds[SND_COFFEE], SOUND_CENTER_SPEAKER);
 367           pplayer->grow();
 368           pplayer->got_power = pplayer->ICE_POWER;
 369         }
 370       else if (kind == UPGRADE_FIREFLOWER)
 371         {
 372           play_sound(sounds[SND_COFFEE], SOUND_CENTER_SPEAKER);
 373           pplayer->grow();
 374           pplayer->got_power = pplayer->FIRE_POWER;
 375         }
 376       else if (kind == UPGRADE_HERRING)
 377         {
 378           play_sound(sounds[SND_HERRING], SOUND_CENTER_SPEAKER);
 379           pplayer->invincible_timer.start(TUX_INVINCIBLE_TIME);
 380           World::current()->play_music(HERRING_MUSIC);
 381         }
 382       else if (kind == UPGRADE_1UP)
 383         {
 384           if(player_status.lives < MAX_LIVES) {
 385             player_status.lives++;
 386             play_sound(sounds[SND_LIFEUP], SOUND_CENTER_SPEAKER);
 387           }
 388         }
 389
 390       remove_me();
 391       return;
 392     }
 393 }
 394
 395 void load_special_gfx()
 396 {
 397   img_growup    = sprite_manager->load("egg");
 398   img_iceflower = sprite_manager->load("iceflower");
 399   img_fireflower = sprite_manager->load("fireflower");
 400   img_star      = sprite_manager->load("star");
 401   img_1up       = sprite_manager->load("1up");
 402
 403   img_firebullet    = sprite_manager->load("firebullet");
 404   img_icebullet    = sprite_manager->load("icebullet");
 405 }
 406
 407 void free_special_gfx()
 408 {
 409 }
 410