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 < 0 ||
 111       base.y > screen->h ||
 112       issolid(base.x + 4, base.y + 2) ||
 113       issolid(base.x, base.y + 2) ||
 114       life_count <= 0)
 115     {
 116       remove_me();
 117     }
 118
 119 }
 120
 121 void
 122 Bullet::draw()
 123 {
 124   if (base.x >= scroll_x - base.width &&
 125       base.x <= scroll_x + screen->w)
 126     {
 127       img_bullet->draw(base.x - scroll_x, base.y);
 128     }
 129 }
 130
 131 void
 132 Bullet::collision(int c_object)
 133 {
 134   if(c_object == CO_BADGUY) {
 135     remove_me();
 136   }
 137 }
 138
 139 void
 140 Upgrade::init(float x_, float y_, Direction dir_, UpgradeKind kind_)
 141 {
 142   kind = kind_;
 143   dir = dir_;
 144
 145   base.width = 32;
 146   base.height = 0;
 147   base.x = x_;
 148   base.y = y_;
 149   old_base = base;
 150
 151   physic.reset();
 152   physic.enable_gravity(false);
 153
 154   if(kind == UPGRADE_1UP || kind == UPGRADE_HERRING) {
 155     physic.set_velocity(dir == LEFT ? -1 : 1, 4);
 156     physic.enable_gravity(true);
 157     base.height = 32;
 158   } else if (kind == UPGRADE_ICEFLOWER) {
 159     // nothing
 160   } else if (kind == UPGRADE_GROWUP) {
 161     physic.set_velocity(dir == LEFT ? -GROWUP_SPEED : GROWUP_SPEED, 0);
 162   } else {
 163     physic.set_velocity(dir == LEFT ? -2 : 2, 0);
 164   }
 165 }
 166
 167 void
 168 Upgrade::remove_me()
 169 {
 170   std::vector<Upgrade>& upgrades = World::current()->upgrades;
 171   for(std::vector<Upgrade>::iterator i = upgrades.begin();
 172          i != upgrades.end(); ++i) {
 173     if( & (*i) == this) {
 174       upgrades.erase(i);
 175       return;
 176     }
 177   }
 178
 179   assert(false);
 180 }
 181
 182 void
 183 Upgrade::action(double frame_ratio)
 184 {
 185   if (kind == UPGRADE_ICEFLOWER || kind == UPGRADE_GROWUP) {
 186     if (base.height < 32) {
 187       /* Rise up! */
 188       base.height = base.height + 0.7 * frame_ratio;
 189       if(base.height > 32)
 190         base.height = 32;
 191
 192       return;
 193     }
 194   }
 195
 196   /* Away from the screen? Kill it! */
 197   if(base.x < scroll_x - OFFSCREEN_DISTANCE) {
 198       remove_me();
 199       return;
 200   }
 201   if(base.y > screen->h) {
 202     remove_me();
 203     return;
 204   }
 205
 206   /* Move around? */
 207   physic.apply(frame_ratio, base.x, base.y);
 208   if(kind == UPGRADE_GROWUP) {
 209     collision_swept_object_map(&old_base, &base);
 210   }
 211
 212   // fall down?
 213   if(kind == UPGRADE_GROWUP || kind == UPGRADE_HERRING) {
 214     // falling?
 215     if(physic.get_velocity_y() != 0) {
 216       if(issolid(base.x, base.y + base.height)) {
 217         base.y = int(base.y / 32) * 32;
 218         old_base = base;
 219         if(kind == UPGRADE_GROWUP) {
 220           physic.enable_gravity(false);
 221           physic.set_velocity(dir == LEFT ? -GROWUP_SPEED : GROWUP_SPEED, 0);
 222         } else if(kind == UPGRADE_HERRING) {
 223           physic.set_velocity(dir == LEFT ? -2 : 2, 3);
 224         }
 225       }
 226     } else {
 227       if((physic.get_velocity_x() < 0
 228             && !issolid(base.x+base.width, base.y + base.height))
 229         || (physic.get_velocity_x() > 0
 230             && !issolid(base.x, base.y + base.height))) {
 231         physic.enable_gravity(true);
 232       }
 233     }
 234   }
 235
 236   // horizontal bounce?
 237   if(kind == UPGRADE_GROWUP || kind == UPGRADE_HERRING) {
 238     if (  (physic.get_velocity_x() < 0
 239           && issolid(base.x, (int) base.y + base.height/2))
 240         ||  (physic.get_velocity_x() > 0
 241           && issolid(base.x + base.width, (int) base.y + base.height/2))) {
 242         physic.set_velocity(-physic.get_velocity_x(),physic.get_velocity_y());
 243         dir = dir == LEFT ? RIGHT : LEFT;
 244     }
 245   }
 246 }
 247
 248 void
 249 Upgrade::draw()
 250 {
 251   SDL_Rect dest;
 252   if (base.height < 32)
 253     {
 254       /* Rising up... */
 255
 256       dest.x = (int)(base.x - scroll_x);
 257       dest.y = (int)(base.y + 32 - base.height);
 258       dest.w = 32;
 259       dest.h = (int)base.height;
 260
 261       if (kind == UPGRADE_GROWUP)
 262         img_growup->draw_part(0,0,dest.x,dest.y,dest.w,dest.h);
 263       else if (kind == UPGRADE_ICEFLOWER)
 264         img_iceflower->draw_part(0,0,dest.x,dest.y,dest.w,dest.h);
 265       else if (kind == UPGRADE_HERRING)
 266         img_star->draw_part(0,0,dest.x,dest.y,dest.w,dest.h);
 267       else if (kind == UPGRADE_1UP)
 268         img_1up->draw_part( 0, 0, dest.x, dest.y, dest.w, dest.h);
 269     }
 270   else
 271     {
 272       if (kind == UPGRADE_GROWUP)
 273         {
 274           img_growup->draw(
 275                        base.x - scroll_x, base.y);
 276         }
 277       else if (kind == UPGRADE_ICEFLOWER)
 278         {
 279           img_iceflower->draw(
 280                        base.x - scroll_x, base.y);
 281         }
 282       else if (kind == UPGRADE_HERRING)
 283         {
 284           img_star->draw(
 285                        base.x - scroll_x, base.y);
 286         }
 287       else if (kind == UPGRADE_1UP)
 288         {
 289           img_1up->draw( base.x - scroll_x, base.y);
 290         }
 291     }
 292 }
 293
 294 void
 295 Upgrade::bump(Player* )
 296 {
 297   // these can't be bumped
 298   if(kind != UPGRADE_GROWUP)
 299     return;
 300
 301   play_sound(sounds[SND_BUMP_UPGRADE], SOUND_CENTER_SPEAKER);
 302
 303   // do a little jump and change direction
 304   physic.set_velocity(-physic.get_velocity_x(), 3);
 305   dir = dir == LEFT ? RIGHT : LEFT;
 306   physic.enable_gravity(true);
 307 }
 308
 309 void
 310 Upgrade::collision(void* p_c_object, int c_object, CollisionType type)
 311 {
 312   Player* pplayer = NULL;
 313
 314   if(type == COLLISION_BUMP) {
 315     if(c_object == CO_PLAYER)
 316       pplayer = (Player*) p_c_object;
 317     bump(pplayer);
 318     return;
 319   }
 320
 321   switch (c_object)
 322     {
 323     case CO_PLAYER:
 324       /* Remove the upgrade: */
 325
 326       /* p_c_object is CO_PLAYER, so assign it to pplayer */
 327       pplayer = (Player*) p_c_object;
 328
 329       /* Affect the player: */
 330
 331       if (kind == UPGRADE_GROWUP)
 332         {
 333           play_sound(sounds[SND_EXCELLENT], SOUND_CENTER_SPEAKER);
 334           pplayer->size = BIG;
 335           pplayer->base.height = 64;
 336           pplayer->base.y -= 32;
 337           if(collision_object_map(pplayer->base))
 338             {
 339               pplayer->base.height = 32;
 340               pplayer->base.y += 32;
 341               pplayer->duck = true;
 342             }
 343         }
 344       else if (kind == UPGRADE_ICEFLOWER)
 345         {
 346           play_sound(sounds[SND_COFFEE], SOUND_CENTER_SPEAKER);
 347           pplayer->got_coffee = true;
 348           if (pplayer->size == SMALL)
 349             {
 350               pplayer->size = BIG;
 351               pplayer->base.height = 64;
 352               pplayer->base.y -= 32;
 353             }
 354           if(collision_object_map(pplayer->base))
 355             {
 356               pplayer->base.height = 32;
 357               pplayer->base.y += 32;
 358               pplayer->duck = true;
 359             }
 360         }
 361       else if (kind == UPGRADE_HERRING)
 362         {
 363           play_sound(sounds[SND_HERRING], SOUND_CENTER_SPEAKER);
 364           pplayer->invincible_timer.start(TUX_INVINCIBLE_TIME);
 365           World::current()->play_music(HERRING_MUSIC);
 366         }
 367       else if (kind == UPGRADE_1UP)
 368         {
 369           if(player_status.lives < MAX_LIVES) {
 370             player_status.lives++;
 371             play_sound(sounds[SND_LIFEUP], SOUND_CENTER_SPEAKER);
 372           }
 373         }
 374
 375       remove_me();
 376       return;
 377     }
 378 }
 379
 380 void load_special_gfx()
 381 {
 382   img_growup    = sprite_manager->load("egg");
 383   img_iceflower = sprite_manager->load("iceflower");
 384   img_star      = sprite_manager->load("star");
 385   img_1up       = sprite_manager->load("1up");
 386
 387   img_bullet    = sprite_manager->load("bullet");
 388 }
 389
 390 void free_special_gfx()
 391 {
 392 }
 393